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 /*
  79  *      Convert a ROSE address into text.
  80  */
  81 const char *rose2asc(const rose_address *addr)
  82 {
  83         static char buffer[11];
  84
  85         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
  86             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
  87             addr->rose_addr[4] == 0x00) {
  88                 strcpy(buffer, "*");
  89         } else {
  90                 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
  91                                                 addr->rose_addr[1] & 0xFF,
  92                                                 addr->rose_addr[2] & 0xFF,
  93                                                 addr->rose_addr[3] & 0xFF,
  94                                                 addr->rose_addr[4] & 0xFF);
  95         }
  96
  97         return buffer;
  98 }
  99
 100 /*
 101  *      Compare two ROSE addresses, 0 == equal.
 102  */
 103 int rosecmp(rose_address *addr1, rose_address *addr2)
 104 {
 105         int i;
 106
 107         for (i = 0; i < 5; i++)
 108                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
 109                         return 1;
 110
 111         return 0;
 112 }
 113
 114 /*
 115  *      Compare two ROSE addresses for only mask digits, 0 == equal.
 116  */
 117 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 118 {
 119         int i, j;
 120
 121         if (mask > 10)
 122                 return 1;
 123
 124         for (i = 0; i < mask; i++) {
 125                 j = i / 2;
 126
 127                 if ((i % 2) != 0) {
 128                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
 129                                 return 1;
 130                 } else {
 131                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
 132                                 return 1;
 133                 }
 134         }
 135
 136         return 0;
 137 }
 138
 139 /*
 140  *      Socket removal during an interrupt is now safe.
 141  */
 142 static void rose_remove_socket(struct sock *sk)
 143 {
 144         spin_lock_bh(&rose_list_lock);
 145         sk_del_node_init(sk);
 146         spin_unlock_bh(&rose_list_lock);
 147 }
 148
 149 /*
 150  *      Kill all bound sockets on a broken link layer connection to a
 151  *      particular neighbour.
 152  */
 153 void rose_kill_by_neigh(struct rose_neigh *neigh)
 154 {
 155         struct sock *s;
 156         struct hlist_node *node;
 157
 158         spin_lock_bh(&rose_list_lock);
 159         sk_for_each(s, node, &rose_list) {
 160                 struct rose_sock *rose = rose_sk(s);
 161
 162                 if (rose->neighbour == neigh) {
 163                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 164                         rose->neighbour->use--;
 165                         rose->neighbour = NULL;
 166                 }
 167         }
 168         spin_unlock_bh(&rose_list_lock);
 169 }
 170
 171 /*
 172  *      Kill all bound sockets on a dropped device.
 173  */
 174 static void rose_kill_by_device(struct net_device *dev)
 175 {
 176         struct sock *s;
 177         struct hlist_node *node;
 178
 179         spin_lock_bh(&rose_list_lock);
 180         sk_for_each(s, node, &rose_list) {
 181                 struct rose_sock *rose = rose_sk(s);
 182
 183                 if (rose->device == dev) {
 184                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 185                         rose->neighbour->use--;
 186                         rose->device = NULL;
 187                 }
 188         }
 189         spin_unlock_bh(&rose_list_lock);
 190 }
 191
 192 /*
 193  *      Handle device status changes.
 194  */
 195 static int rose_device_event(struct notifier_block *this, unsigned long event,
 196         void *ptr)
 197 {
 198         struct net_device *dev = (struct net_device *)ptr;
 199
 200         if (event != NETDEV_DOWN)
 201                 return NOTIFY_DONE;
 202
 203         switch (dev->type) {
 204         case ARPHRD_ROSE:
 205                 rose_kill_by_device(dev);
 206                 break;
 207         case ARPHRD_AX25:
 208                 rose_link_device_down(dev);
 209                 rose_rt_device_down(dev);
 210                 break;
 211         }
 212
 213         return NOTIFY_DONE;
 214 }
 215
 216 /*
 217  *      Add a socket to the bound sockets list.
 218  */
 219 static void rose_insert_socket(struct sock *sk)
 220 {
 221
 222         spin_lock_bh(&rose_list_lock);
 223         sk_add_node(sk, &rose_list);
 224         spin_unlock_bh(&rose_list_lock);
 225 }
 226
 227 /*
 228  *      Find a socket that wants to accept the Call Request we just
 229  *      received.
 230  */
 231 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 232 {
 233         struct sock *s;
 234         struct hlist_node *node;
 235
 236         spin_lock_bh(&rose_list_lock);
 237         sk_for_each(s, node, &rose_list) {
 238                 struct rose_sock *rose = rose_sk(s);
 239
 240                 if (!rosecmp(&rose->source_addr, addr) &&
 241                     !ax25cmp(&rose->source_call, call) &&
 242                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 243                         goto found;
 244         }
 245
 246         sk_for_each(s, node, &rose_list) {
 247                 struct rose_sock *rose = rose_sk(s);
 248
 249                 if (!rosecmp(&rose->source_addr, addr) &&
 250                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 251                     s->sk_state == TCP_LISTEN)
 252                         goto found;
 253         }
 254         s = NULL;
 255 found:
 256         spin_unlock_bh(&rose_list_lock);
 257         return s;
 258 }
 259
 260 /*
 261  *      Find a connected ROSE socket given my LCI and device.
 262  */
 263 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 264 {
 265         struct sock *s;
 266         struct hlist_node *node;
 267
 268         spin_lock_bh(&rose_list_lock);
 269         sk_for_each(s, node, &rose_list) {
 270                 struct rose_sock *rose = rose_sk(s);
 271
 272                 if (rose->lci == lci && rose->neighbour == neigh)
 273                         goto found;
 274         }
 275         s = NULL;
 276 found:
 277         spin_unlock_bh(&rose_list_lock);
 278         return s;
 279 }
 280
 281 /*
 282  *      Find a unique LCI for a given device.
 283  */
 284 unsigned int rose_new_lci(struct rose_neigh *neigh)
 285 {
 286         int lci;
 287
 288         if (neigh->dce_mode) {
 289                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 290                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 291                                 return lci;
 292         } else {
 293                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 294                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 295                                 return lci;
 296         }
 297
 298         return 0;
 299 }
 300
 301 /*
 302  *      Deferred destroy.
 303  */
 304 void rose_destroy_socket(struct sock *);
 305
 306 /*
 307  *      Handler for deferred kills.
 308  */
 309 static void rose_destroy_timer(unsigned long data)
 310 {
 311         rose_destroy_socket((struct sock *)data);
 312 }
 313
 314 /*
 315  *      This is called from user mode and the timers. Thus it protects itself
 316  *      against interrupt users but doesn't worry about being called during
 317  *      work.  Once it is removed from the queue no interrupt or bottom half
 318  *      will touch it and we are (fairly 8-) ) safe.
 319  */
 320 void rose_destroy_socket(struct sock *sk)
 321 {
 322         struct sk_buff *skb;
 323
 324         rose_remove_socket(sk);
 325         rose_stop_heartbeat(sk);
 326         rose_stop_idletimer(sk);
 327         rose_stop_timer(sk);
 328
 329         rose_clear_queues(sk);          /* Flush the queues */
 330
 331         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 332                 if (skb->sk != sk) {    /* A pending connection */
 333                         /* Queue the unaccepted socket for death */
 334                         sock_set_flag(skb->sk, SOCK_DEAD);
 335                         rose_start_heartbeat(skb->sk);
 336                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 337                 }
 338
 339                 kfree_skb(skb);
 340         }
 341
 342         if (atomic_read(&sk->sk_wmem_alloc) ||
 343             atomic_read(&sk->sk_rmem_alloc)) {
 344                 /* Defer: outstanding buffers */
 345                 init_timer(&sk->sk_timer);
 346                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 347                 sk->sk_timer.function = rose_destroy_timer;
 348                 sk->sk_timer.data     = (unsigned long)sk;
 349                 add_timer(&sk->sk_timer);
 350         } else
 351                 sock_put(sk);
 352 }
 353
 354 /*
 355  *      Handling for system calls applied via the various interfaces to a
 356  *      ROSE socket object.
 357  */
 358
 359 static int rose_setsockopt(struct socket *sock, int level, int optname,
 360         char __user *optval, int optlen)
 361 {
 362         struct sock *sk = sock->sk;
 363         struct rose_sock *rose = rose_sk(sk);
 364         int opt;
 365
 366         if (level != SOL_ROSE)
 367                 return -ENOPROTOOPT;
 368
 369         if (optlen < sizeof(int))
 370                 return -EINVAL;
 371
 372         if (get_user(opt, (int __user *)optval))
 373                 return -EFAULT;
 374
 375         switch (optname) {
 376         case ROSE_DEFER:
 377                 rose->defer = opt ? 1 : 0;
 378                 return 0;
 379
 380         case ROSE_T1:
 381                 if (opt < 1)
 382                         return -EINVAL;
 383                 rose->t1 = opt * HZ;
 384                 return 0;
 385
 386         case ROSE_T2:
 387                 if (opt < 1)
 388                         return -EINVAL;
 389                 rose->t2 = opt * HZ;
 390                 return 0;
 391
 392         case ROSE_T3:
 393                 if (opt < 1)
 394                         return -EINVAL;
 395                 rose->t3 = opt * HZ;
 396                 return 0;
 397
 398         case ROSE_HOLDBACK:
 399                 if (opt < 1)
 400                         return -EINVAL;
 401                 rose->hb = opt * HZ;
 402                 return 0;
 403
 404         case ROSE_IDLE:
 405                 if (opt < 0)
 406                         return -EINVAL;
 407                 rose->idle = opt * 60 * HZ;
 408                 return 0;
 409
 410         case ROSE_QBITINCL:
 411                 rose->qbitincl = opt ? 1 : 0;
 412                 return 0;
 413
 414         default:
 415                 return -ENOPROTOOPT;
 416         }
 417 }
 418
 419 static int rose_getsockopt(struct socket *sock, int level, int optname,
 420         char __user *optval, int __user *optlen)
 421 {
 422         struct sock *sk = sock->sk;
 423         struct rose_sock *rose = rose_sk(sk);
 424         int val = 0;
 425         int len;
 426
 427         if (level != SOL_ROSE)
 428                 return -ENOPROTOOPT;
 429
 430         if (get_user(len, optlen))
 431                 return -EFAULT;
 432
 433         if (len < 0)
 434                 return -EINVAL;
 435
 436         switch (optname) {
 437         case ROSE_DEFER:
 438                 val = rose->defer;
 439                 break;
 440
 441         case ROSE_T1:
 442                 val = rose->t1 / HZ;
 443                 break;
 444
 445         case ROSE_T2:
 446                 val = rose->t2 / HZ;
 447                 break;
 448
 449         case ROSE_T3:
 450                 val = rose->t3 / HZ;
 451                 break;
 452
 453         case ROSE_HOLDBACK:
 454                 val = rose->hb / HZ;
 455                 break;
 456
 457         case ROSE_IDLE:
 458                 val = rose->idle / (60 * HZ);
 459                 break;
 460
 461         case ROSE_QBITINCL:
 462                 val = rose->qbitincl;
 463                 break;
 464
 465         default:
 466                 return -ENOPROTOOPT;
 467         }
 468
 469         len = min_t(unsigned int, len, sizeof(int));
 470
 471         if (put_user(len, optlen))
 472                 return -EFAULT;
 473
 474         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 475 }
 476
 477 static int rose_listen(struct socket *sock, int backlog)
 478 {
 479         struct sock *sk = sock->sk;
 480
 481         if (sk->sk_state != TCP_LISTEN) {
 482                 struct rose_sock *rose = rose_sk(sk);
 483
 484                 rose->dest_ndigis = 0;
 485                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 486                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 487                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 488                 sk->sk_max_ack_backlog = backlog;
 489                 sk->sk_state           = TCP_LISTEN;
 490                 return 0;
 491         }
 492
 493         return -EOPNOTSUPP;
 494 }
 495
 496 static struct proto rose_proto = {
 497         .name     = "ROSE",
 498         .owner    = THIS_MODULE,
 499         .obj_size = sizeof(struct rose_sock),
 500 };
 501
 502 static int rose_create(struct socket *sock, int protocol)
 503 {
 504         struct sock *sk;
 505         struct rose_sock *rose;
 506
 507         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 508                 return -ESOCKTNOSUPPORT;
 509
 510         if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
 511                 return -ENOMEM;
 512
 513         rose = rose_sk(sk);
 514
 515         sock_init_data(sock, sk);
 516
 517         skb_queue_head_init(&rose->ack_queue);
 518 #ifdef M_BIT
 519         skb_queue_head_init(&rose->frag_queue);
 520         rose->fraglen    = 0;
 521 #endif
 522
 523         sock->ops    = &rose_proto_ops;
 524         sk->sk_protocol = protocol;
 525
 526         init_timer(&rose->timer);
 527         init_timer(&rose->idletimer);
 528
 529         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 530         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 531         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 532         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 533         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 534
 535         rose->state = ROSE_STATE_0;
 536
 537         return 0;
 538 }
 539
 540 static struct sock *rose_make_new(struct sock *osk)
 541 {
 542         struct sock *sk;
 543         struct rose_sock *rose, *orose;
 544
 545         if (osk->sk_type != SOCK_SEQPACKET)
 546                 return NULL;
 547
 548         if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
 549                 return NULL;
 550
 551         rose = rose_sk(sk);
 552
 553         sock_init_data(NULL, sk);
 554
 555         skb_queue_head_init(&rose->ack_queue);
 556 #ifdef M_BIT
 557         skb_queue_head_init(&rose->frag_queue);
 558         rose->fraglen  = 0;
 559 #endif
 560
 561         sk->sk_type     = osk->sk_type;
 562         sk->sk_socket   = osk->sk_socket;
 563         sk->sk_priority = osk->sk_priority;
 564         sk->sk_protocol = osk->sk_protocol;
 565         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 566         sk->sk_sndbuf   = osk->sk_sndbuf;
 567         sk->sk_state    = TCP_ESTABLISHED;
 568         sk->sk_sleep    = osk->sk_sleep;
 569         sock_copy_flags(sk, osk);
 570
 571         init_timer(&rose->timer);
 572         init_timer(&rose->idletimer);
 573
 574         orose           = rose_sk(osk);
 575         rose->t1        = orose->t1;
 576         rose->t2        = orose->t2;
 577         rose->t3        = orose->t3;
 578         rose->hb        = orose->hb;
 579         rose->idle      = orose->idle;
 580         rose->defer     = orose->defer;
 581         rose->device    = orose->device;
 582         rose->qbitincl  = orose->qbitincl;
 583
 584         return sk;
 585 }
 586
 587 static int rose_release(struct socket *sock)
 588 {
 589         struct sock *sk = sock->sk;
 590         struct rose_sock *rose;
 591
 592         if (sk == NULL) return 0;
 593
 594         rose = rose_sk(sk);
 595
 596         switch (rose->state) {
 597         case ROSE_STATE_0:
 598                 rose_disconnect(sk, 0, -1, -1);
 599                 rose_destroy_socket(sk);
 600                 break;
 601
 602         case ROSE_STATE_2:
 603                 rose->neighbour->use--;
 604                 rose_disconnect(sk, 0, -1, -1);
 605                 rose_destroy_socket(sk);
 606                 break;
 607
 608         case ROSE_STATE_1:
 609         case ROSE_STATE_3:
 610         case ROSE_STATE_4:
 611         case ROSE_STATE_5:
 612                 rose_clear_queues(sk);
 613                 rose_stop_idletimer(sk);
 614                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 615                 rose_start_t3timer(sk);
 616                 rose->state  = ROSE_STATE_2;
 617                 sk->sk_state    = TCP_CLOSE;
 618                 sk->sk_shutdown |= SEND_SHUTDOWN;
 619                 sk->sk_state_change(sk);
 620                 sock_set_flag(sk, SOCK_DEAD);
 621                 sock_set_flag(sk, SOCK_DESTROY);
 622                 break;
 623
 624         default:
 625                 break;
 626         }
 627
 628         sock->sk = NULL;
 629
 630         return 0;
 631 }
 632
 633 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 634 {
 635         struct sock *sk = sock->sk;
 636         struct rose_sock *rose = rose_sk(sk);
 637         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 638         struct net_device *dev;
 639         ax25_address *source;
 640         ax25_uid_assoc *user;
 641         int n;
 642
 643         if (!sock_flag(sk, SOCK_ZAPPED))
 644                 return -EINVAL;
 645
 646         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 647                 return -EINVAL;
 648
 649         if (addr->srose_family != AF_ROSE)
 650                 return -EINVAL;
 651
 652         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 653                 return -EINVAL;
 654
 655         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 656                 return -EINVAL;
 657
 658         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
 659                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
 660                 return -EADDRNOTAVAIL;
 661         }
 662
 663         source = &addr->srose_call;
 664
 665         user = ax25_findbyuid(current->euid);
 666         if (user) {
 667                 rose->source_call = user->call;
 668                 ax25_uid_put(user);
 669         } else {
 670                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 671                         return -EACCES;
 672                 rose->source_call   = *source;
 673         }
 674
 675         rose->source_addr   = addr->srose_addr;
 676         rose->device        = dev;
 677         rose->source_ndigis = addr->srose_ndigis;
 678
 679         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 680                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 681                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 682                         rose->source_digis[n] = full_addr->srose_digis[n];
 683         } else {
 684                 if (rose->source_ndigis == 1) {
 685                         rose->source_digis[0] = addr->srose_digi;
 686                 }
 687         }
 688
 689         rose_insert_socket(sk);
 690
 691         sock_reset_flag(sk, SOCK_ZAPPED);
 692         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
 693         return 0;
 694 }
 695
 696 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 697 {
 698         struct sock *sk = sock->sk;
 699         struct rose_sock *rose = rose_sk(sk);
 700         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 701         unsigned char cause, diagnostic;
 702         struct net_device *dev;
 703         ax25_uid_assoc *user;
 704         int n, err = 0;
 705
 706         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 707                 return -EINVAL;
 708
 709         if (addr->srose_family != AF_ROSE)
 710                 return -EINVAL;
 711
 712         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 713                 return -EINVAL;
 714
 715         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 716                 return -EINVAL;
 717
 718         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 719         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 720                 return -EINVAL;
 721
 722         lock_sock(sk);
 723
 724         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 725                 /* Connect completed during a ERESTARTSYS event */
 726                 sock->state = SS_CONNECTED;
 727                 goto out_release;
 728         }
 729
 730         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 731                 sock->state = SS_UNCONNECTED;
 732                 err = -ECONNREFUSED;
 733                 goto out_release;
 734         }
 735
 736         if (sk->sk_state == TCP_ESTABLISHED) {
 737                 /* No reconnect on a seqpacket socket */
 738                 err = -EISCONN;
 739                 goto out_release;
 740         }
 741
 742         sk->sk_state   = TCP_CLOSE;
 743         sock->state = SS_UNCONNECTED;
 744
 745         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 746                                          &diagnostic);
 747         if (!rose->neighbour)
 748                 return -ENETUNREACH;
 749
 750         rose->lci = rose_new_lci(rose->neighbour);
 751         if (!rose->lci) {
 752                 err = -ENETUNREACH;
 753                 goto out_release;
 754         }
 755
 756         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 757                 sock_reset_flag(sk, SOCK_ZAPPED);
 758
 759                 if ((dev = rose_dev_first()) == NULL) {
 760                         err = -ENETUNREACH;
 761                         goto out_release;
 762                 }
 763
 764                 user = ax25_findbyuid(current->euid);
 765                 if (!user) {
 766                         err = -EINVAL;
 767                         goto out_release;
 768                 }
 769
 770                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 771                 rose->source_call = user->call;
 772                 rose->device      = dev;
 773                 ax25_uid_put(user);
 774
 775                 rose_insert_socket(sk);         /* Finish the bind */
 776         }
 777 rose_try_next_neigh:
 778         rose->dest_addr   = addr->srose_addr;
 779         rose->dest_call   = addr->srose_call;
 780         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 781         rose->dest_ndigis = addr->srose_ndigis;
 782
 783         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 784                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 785                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 786                         rose->dest_digis[n] = full_addr->srose_digis[n];
 787         } else {
 788                 if (rose->dest_ndigis == 1) {
 789                         rose->dest_digis[0] = addr->srose_digi;
 790                 }
 791         }
 792
 793         /* Move to connecting socket, start sending Connect Requests */
 794         sock->state   = SS_CONNECTING;
 795         sk->sk_state     = TCP_SYN_SENT;
 796
 797         rose->state = ROSE_STATE_1;
 798
 799         rose->neighbour->use++;
 800
 801         rose_write_internal(sk, ROSE_CALL_REQUEST);
 802         rose_start_heartbeat(sk);
 803         rose_start_t1timer(sk);
 804
 805         /* Now the loop */
 806         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
 807                 err = -EINPROGRESS;
 808                 goto out_release;
 809         }
 810
 811         /*
 812          * A Connect Ack with Choke or timeout or failed routing will go to
 813          * closed.
 814          */
 815         if (sk->sk_state == TCP_SYN_SENT) {
 816                 DEFINE_WAIT(wait);
 817
 818                 for (;;) {
 819                         prepare_to_wait(sk->sk_sleep, &wait,
 820                                         TASK_INTERRUPTIBLE);
 821                         if (sk->sk_state != TCP_SYN_SENT)
 822                                 break;
 823                         if (!signal_pending(current)) {
 824                                 release_sock(sk);
 825                                 schedule();
 826                                 lock_sock(sk);
 827                                 continue;
 828                         }
 829                         err = -ERESTARTSYS;
 830                         break;
 831                 }
 832                 finish_wait(sk->sk_sleep, &wait);
 833
 834                 if (err)
 835                         goto out_release;
 836         }
 837
 838         if (sk->sk_state != TCP_ESTABLISHED) {
 839         /* Try next neighbour */
 840                 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic);
 841                 if (rose->neighbour)
 842                         goto rose_try_next_neigh;
 843
 844                 /* No more neighbours */
 845                 sock->state = SS_UNCONNECTED;
 846                 err = sock_error(sk);   /* Always set at this point */
 847                 goto out_release;
 848         }
 849
 850         sock->state = SS_CONNECTED;
 851
 852 out_release:
 853         release_sock(sk);
 854
 855         return err;
 856 }
 857
 858 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 859 {
 860         struct sk_buff *skb;
 861         struct sock *newsk;
 862         DEFINE_WAIT(wait);
 863         struct sock *sk;
 864         int err = 0;
 865
 866         if ((sk = sock->sk) == NULL)
 867                 return -EINVAL;
 868
 869         lock_sock(sk);
 870         if (sk->sk_type != SOCK_SEQPACKET) {
 871                 err = -EOPNOTSUPP;
 872                 goto out_release;
 873         }
 874
 875         if (sk->sk_state != TCP_LISTEN) {
 876                 err = -EINVAL;
 877                 goto out_release;
 878         }
 879
 880         /*
 881          *      The write queue this time is holding sockets ready to use
 882          *      hooked into the SABM we saved
 883          */
 884         for (;;) {
 885                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 886
 887                 skb = skb_dequeue(&sk->sk_receive_queue);
 888                 if (skb)
 889                         break;
 890
 891                 if (flags & O_NONBLOCK) {
 892                         err = -EWOULDBLOCK;
 893                         break;
 894                 }
 895                 if (!signal_pending(current)) {
 896                         release_sock(sk);
 897                         schedule();
 898                         lock_sock(sk);
 899                         continue;
 900                 }
 901                 err = -ERESTARTSYS;
 902                 break;
 903         }
 904         finish_wait(sk->sk_sleep, &wait);
 905         if (err)
 906                 goto out_release;
 907
 908         newsk = skb->sk;
 909         newsk->sk_socket = newsock;
 910         newsk->sk_sleep = &newsock->wait;
 911
 912         /* Now attach up the new socket */
 913         skb->sk = NULL;
 914         kfree_skb(skb);
 915         sk->sk_ack_backlog--;
 916         newsock->sk = newsk;
 917
 918 out_release:
 919         release_sock(sk);
 920
 921         return err;
 922 }
 923
 924 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 925         int *uaddr_len, int peer)
 926 {
 927         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 928         struct sock *sk = sock->sk;
 929         struct rose_sock *rose = rose_sk(sk);
 930         int n;
 931
 932         if (peer != 0) {
 933                 if (sk->sk_state != TCP_ESTABLISHED)
 934                         return -ENOTCONN;
 935                 srose->srose_family = AF_ROSE;
 936                 srose->srose_addr   = rose->dest_addr;
 937                 srose->srose_call   = rose->dest_call;
 938                 srose->srose_ndigis = rose->dest_ndigis;
 939                 for (n = 0; n < rose->dest_ndigis; n++)
 940                         srose->srose_digis[n] = rose->dest_digis[n];
 941         } else {
 942                 srose->srose_family = AF_ROSE;
 943                 srose->srose_addr   = rose->source_addr;
 944                 srose->srose_call   = rose->source_call;
 945                 srose->srose_ndigis = rose->source_ndigis;
 946                 for (n = 0; n < rose->source_ndigis; n++)
 947                         srose->srose_digis[n] = rose->source_digis[n];
 948         }
 949
 950         *uaddr_len = sizeof(struct full_sockaddr_rose);
 951         return 0;
 952 }
 953
 954 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 955 {
 956         struct sock *sk;
 957         struct sock *make;
 958         struct rose_sock *make_rose;
 959         struct rose_facilities_struct facilities;
 960         int n, len;
 961
 962         skb->sk = NULL;         /* Initially we don't know who it's for */
 963
 964         /*
 965          *      skb->data points to the rose frame start
 966          */
 967         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 968
 969         len  = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
 970         len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
 971         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
 972                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 973                 return 0;
 974         }
 975
 976         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
 977
 978         /*
 979          * We can't accept the Call Request.
 980          */
 981         if (sk == NULL || sk_acceptq_is_full(sk) ||
 982             (make = rose_make_new(sk)) == NULL) {
 983                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
 984                 return 0;
 985         }
 986
 987         skb->sk     = make;
 988         make->sk_state = TCP_ESTABLISHED;
 989         make_rose = rose_sk(make);
 990
 991         make_rose->lci           = lci;
 992         make_rose->dest_addr     = facilities.dest_addr;
 993         make_rose->dest_call     = facilities.dest_call;
 994         make_rose->dest_ndigis   = facilities.dest_ndigis;
 995         for (n = 0 ; n < facilities.dest_ndigis ; n++)
 996                 make_rose->dest_digis[n] = facilities.dest_digis[n];
 997         make_rose->source_addr   = facilities.source_addr;
 998         make_rose->source_call   = facilities.source_call;
 999         make_rose->source_ndigis = facilities.source_ndigis;
1000         for (n = 0 ; n < facilities.source_ndigis ; n++)
1001                 make_rose->source_digis[n]= facilities.source_digis[n];
1002         make_rose->neighbour     = neigh;
1003         make_rose->device        = dev;
1004         make_rose->facilities    = facilities;
1005
1006         make_rose->neighbour->use++;
1007
1008         if (rose_sk(sk)->defer) {
1009                 make_rose->state = ROSE_STATE_5;
1010         } else {
1011                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1012                 make_rose->state = ROSE_STATE_3;
1013                 rose_start_idletimer(make);
1014         }
1015
1016         make_rose->condition = 0x00;
1017         make_rose->vs        = 0;
1018         make_rose->va        = 0;
1019         make_rose->vr        = 0;
1020         make_rose->vl        = 0;
1021         sk->sk_ack_backlog++;
1022
1023         rose_insert_socket(make);
1024
1025         skb_queue_head(&sk->sk_receive_queue, skb);
1026
1027         rose_start_heartbeat(make);
1028
1029         if (!sock_flag(sk, SOCK_DEAD))
1030                 sk->sk_data_ready(sk, skb->len);
1031
1032         return 1;
1033 }
1034
1035 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1036                         struct msghdr *msg, size_t len)
1037 {
1038         struct sock *sk = sock->sk;
1039         struct rose_sock *rose = rose_sk(sk);
1040         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1041         int err;
1042         struct full_sockaddr_rose srose;
1043         struct sk_buff *skb;
1044         unsigned char *asmptr;
1045         int n, size, qbit = 0;
1046
1047         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1048                 return -EINVAL;
1049
1050         if (sock_flag(sk, SOCK_ZAPPED))
1051                 return -EADDRNOTAVAIL;
1052
1053         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1054                 send_sig(SIGPIPE, current, 0);
1055                 return -EPIPE;
1056         }
1057
1058         if (rose->neighbour == NULL || rose->device == NULL)
1059                 return -ENETUNREACH;
1060
1061         if (usrose != NULL) {
1062                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1063                         return -EINVAL;
1064                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1065                 memcpy(&srose, usrose, msg->msg_namelen);
1066                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1067                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1068                         return -EISCONN;
1069                 if (srose.srose_ndigis != rose->dest_ndigis)
1070                         return -EISCONN;
1071                 if (srose.srose_ndigis == rose->dest_ndigis) {
1072                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1073                                 if (ax25cmp(&rose->dest_digis[n],
1074                                             &srose.srose_digis[n]))
1075                                         return -EISCONN;
1076                 }
1077                 if (srose.srose_family != AF_ROSE)
1078                         return -EINVAL;
1079         } else {
1080                 if (sk->sk_state != TCP_ESTABLISHED)
1081                         return -ENOTCONN;
1082
1083                 srose.srose_family = AF_ROSE;
1084                 srose.srose_addr   = rose->dest_addr;
1085                 srose.srose_call   = rose->dest_call;
1086                 srose.srose_ndigis = rose->dest_ndigis;
1087                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1088                         srose.srose_digis[n] = rose->dest_digis[n];
1089         }
1090
1091         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1092
1093         /* Build a packet */
1094         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1095         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1096
1097         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1098                 return err;
1099
1100         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1101
1102         /*
1103          *      Put the data on the end
1104          */
1105         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1106
1107         skb_reset_transport_header(skb);
1108         skb_put(skb, len);
1109
1110         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1111         if (err) {
1112                 kfree_skb(skb);
1113                 return err;
1114         }
1115
1116         /*
1117          *      If the Q BIT Include socket option is in force, the first
1118          *      byte of the user data is the logical value of the Q Bit.
1119          */
1120         if (rose->qbitincl) {
1121                 qbit = skb->data[0];
1122                 skb_pull(skb, 1);
1123         }
1124
1125         /*
1126          *      Push down the ROSE header
1127          */
1128         asmptr = skb_push(skb, ROSE_MIN_LEN);
1129
1130         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1131
1132         /* Build a ROSE Network header */
1133         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1134         asmptr[1] = (rose->lci >> 0) & 0xFF;
1135         asmptr[2] = ROSE_DATA;
1136
1137         if (qbit)
1138                 asmptr[0] |= ROSE_Q_BIT;
1139
1140         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1141
1142         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1143
1144         if (sk->sk_state != TCP_ESTABLISHED) {
1145                 kfree_skb(skb);
1146                 return -ENOTCONN;
1147         }
1148
1149 #ifdef M_BIT
1150 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1151         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1152                 unsigned char header[ROSE_MIN_LEN];
1153                 struct sk_buff *skbn;
1154                 int frontlen;
1155                 int lg;
1156
1157                 /* Save a copy of the Header */
1158                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1159                 skb_pull(skb, ROSE_MIN_LEN);
1160
1161                 frontlen = skb_headroom(skb);
1162
1163                 while (skb->len > 0) {
1164                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1165                                 kfree_skb(skb);
1166                                 return err;
1167                         }
1168
1169                         skbn->sk   = sk;
1170                         skbn->free = 1;
1171                         skbn->arp  = 1;
1172
1173                         skb_reserve(skbn, frontlen);
1174
1175                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1176
1177                         /* Copy the user data */
1178                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1179                         skb_pull(skb, lg);
1180
1181                         /* Duplicate the Header */
1182                         skb_push(skbn, ROSE_MIN_LEN);
1183                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1184
1185                         if (skb->len > 0)
1186                                 skbn->data[2] |= M_BIT;
1187
1188                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1189                 }
1190
1191                 skb->free = 1;
1192                 kfree_skb(skb);
1193         } else {
1194                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1195         }
1196 #else
1197         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1198 #endif
1199
1200         rose_kick(sk);
1201
1202         return len;
1203 }
1204
1205
1206 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1207                         struct msghdr *msg, size_t size, int flags)
1208 {
1209         struct sock *sk = sock->sk;
1210         struct rose_sock *rose = rose_sk(sk);
1211         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1212         size_t copied;
1213         unsigned char *asmptr;
1214         struct sk_buff *skb;
1215         int n, er, qbit;
1216
1217         /*
1218          * This works for seqpacket too. The receiver has ordered the queue for
1219          * us! We do one quick check first though
1220          */
1221         if (sk->sk_state != TCP_ESTABLISHED)
1222                 return -ENOTCONN;
1223
1224         /* Now we can treat all alike */
1225         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1226                 return er;
1227
1228         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1229
1230         skb_pull(skb, ROSE_MIN_LEN);
1231
1232         if (rose->qbitincl) {
1233                 asmptr  = skb_push(skb, 1);
1234                 *asmptr = qbit;
1235         }
1236
1237         skb_reset_transport_header(skb);
1238         copied     = skb->len;
1239
1240         if (copied > size) {
1241                 copied = size;
1242                 msg->msg_flags |= MSG_TRUNC;
1243         }
1244
1245         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1246
1247         if (srose != NULL) {
1248                 srose->srose_family = AF_ROSE;
1249                 srose->srose_addr   = rose->dest_addr;
1250                 srose->srose_call   = rose->dest_call;
1251                 srose->srose_ndigis = rose->dest_ndigis;
1252                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1253                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1254                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1255                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1256                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1257                 } else {
1258                         if (rose->dest_ndigis >= 1) {
1259                                 srose->srose_ndigis = 1;
1260                                 srose->srose_digi = rose->dest_digis[0];
1261                         }
1262                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1263                 }
1264         }
1265
1266         skb_free_datagram(sk, skb);
1267
1268         return copied;
1269 }
1270
1271
1272 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1273 {
1274         struct sock *sk = sock->sk;
1275         struct rose_sock *rose = rose_sk(sk);
1276         void __user *argp = (void __user *)arg;
1277
1278         switch (cmd) {
1279         case TIOCOUTQ: {
1280                 long amount;
1281                 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1282                 if (amount < 0)
1283                         amount = 0;
1284                 return put_user(amount, (unsigned int __user *) argp);
1285         }
1286
1287         case TIOCINQ: {
1288                 struct sk_buff *skb;
1289                 long amount = 0L;
1290                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1291                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1292                         amount = skb->len;
1293                 return put_user(amount, (unsigned int __user *) argp);
1294         }
1295
1296         case SIOCGSTAMP:
1297                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1298
1299         case SIOCGSTAMPNS:
1300                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1301
1302         case SIOCGIFADDR:
1303         case SIOCSIFADDR:
1304         case SIOCGIFDSTADDR:
1305         case SIOCSIFDSTADDR:
1306         case SIOCGIFBRDADDR:
1307         case SIOCSIFBRDADDR:
1308         case SIOCGIFNETMASK:
1309         case SIOCSIFNETMASK:
1310         case SIOCGIFMETRIC:
1311         case SIOCSIFMETRIC:
1312                 return -EINVAL;
1313
1314         case SIOCADDRT:
1315         case SIOCDELRT:
1316         case SIOCRSCLRRT:
1317                 if (!capable(CAP_NET_ADMIN))
1318                         return -EPERM;
1319                 return rose_rt_ioctl(cmd, argp);
1320
1321         case SIOCRSGCAUSE: {
1322                 struct rose_cause_struct rose_cause;
1323                 rose_cause.cause      = rose->cause;
1324                 rose_cause.diagnostic = rose->diagnostic;
1325                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1326         }
1327
1328         case SIOCRSSCAUSE: {
1329                 struct rose_cause_struct rose_cause;
1330                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1331                         return -EFAULT;
1332                 rose->cause      = rose_cause.cause;
1333                 rose->diagnostic = rose_cause.diagnostic;
1334                 return 0;
1335         }
1336
1337         case SIOCRSSL2CALL:
1338                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1339                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1340                         ax25_listen_release(&rose_callsign, NULL);
1341                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1342                         return -EFAULT;
1343                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1344                         return ax25_listen_register(&rose_callsign, NULL);
1345
1346                 return 0;
1347
1348         case SIOCRSGL2CALL:
1349                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1350
1351         case SIOCRSACCEPT:
1352                 if (rose->state == ROSE_STATE_5) {
1353                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1354                         rose_start_idletimer(sk);
1355                         rose->condition = 0x00;
1356                         rose->vs        = 0;
1357                         rose->va        = 0;
1358                         rose->vr        = 0;
1359                         rose->vl        = 0;
1360                         rose->state     = ROSE_STATE_3;
1361                 }
1362                 return 0;
1363
1364         default:
1365                 return -ENOIOCTLCMD;
1366         }
1367
1368         return 0;
1369 }
1370
1371 #ifdef CONFIG_PROC_FS
1372 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1373 {
1374         int i;
1375         struct sock *s;
1376         struct hlist_node *node;
1377
1378         spin_lock_bh(&rose_list_lock);
1379         if (*pos == 0)
1380                 return SEQ_START_TOKEN;
1381
1382         i = 1;
1383         sk_for_each(s, node, &rose_list) {
1384                 if (i == *pos)
1385                         return s;
1386                 ++i;
1387         }
1388         return NULL;
1389 }
1390
1391 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1392 {
1393         ++*pos;
1394
1395         return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1396                 : sk_next((struct sock *)v);
1397 }
1398
1399 static void rose_info_stop(struct seq_file *seq, void *v)
1400 {
1401         spin_unlock_bh(&rose_list_lock);
1402 }
1403
1404 static int rose_info_show(struct seq_file *seq, void *v)
1405 {
1406         char buf[11];
1407
1408         if (v == SEQ_START_TOKEN)
1409                 seq_puts(seq,
1410                          "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");
1411
1412         else {
1413                 struct sock *s = v;
1414                 struct rose_sock *rose = rose_sk(s);
1415                 const char *devname, *callsign;
1416                 const struct net_device *dev = rose->device;
1417
1418                 if (!dev)
1419                         devname = "???";
1420                 else
1421                         devname = dev->name;
1422
1423                 seq_printf(seq, "%-10s %-9s ",
1424                         rose2asc(&rose->dest_addr),
1425                         ax2asc(buf, &rose->dest_call));
1426
1427                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1428                         callsign = "??????-?";
1429                 else
1430                         callsign = ax2asc(buf, &rose->source_call);
1431
1432                 seq_printf(seq,
1433                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1434                         rose2asc(&rose->source_addr),
1435                         callsign,
1436                         devname,
1437                         rose->lci & 0x0FFF,
1438                         (rose->neighbour) ? rose->neighbour->number : 0,
1439                         rose->state,
1440                         rose->vs,
1441                         rose->vr,
1442                         rose->va,
1443                         ax25_display_timer(&rose->timer) / HZ,
1444                         rose->t1 / HZ,
1445                         rose->t2 / HZ,
1446                         rose->t3 / HZ,
1447                         rose->hb / HZ,
1448                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1449                         rose->idle / (60 * HZ),
1450                         atomic_read(&s->sk_wmem_alloc),
1451                         atomic_read(&s->sk_rmem_alloc),
1452                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1453         }
1454
1455         return 0;
1456 }
1457
1458 static const struct seq_operations rose_info_seqops = {
1459         .start = rose_info_start,
1460         .next = rose_info_next,
1461         .stop = rose_info_stop,
1462         .show = rose_info_show,
1463 };
1464
1465 static int rose_info_open(struct inode *inode, struct file *file)
1466 {
1467         return seq_open(file, &rose_info_seqops);
1468 }
1469
1470 static const struct file_operations rose_info_fops = {
1471         .owner = THIS_MODULE,
1472         .open = rose_info_open,
1473         .read = seq_read,
1474         .llseek = seq_lseek,
1475         .release = seq_release,
1476 };
1477 #endif  /* CONFIG_PROC_FS */
1478
1479 static struct net_proto_family rose_family_ops = {
1480         .family         =       PF_ROSE,
1481         .create         =       rose_create,
1482         .owner          =       THIS_MODULE,
1483 };
1484
1485 static struct proto_ops rose_proto_ops = {
1486         .family         =       PF_ROSE,
1487         .owner          =       THIS_MODULE,
1488         .release        =       rose_release,
1489         .bind           =       rose_bind,
1490         .connect        =       rose_connect,
1491         .socketpair     =       sock_no_socketpair,
1492         .accept         =       rose_accept,
1493         .getname        =       rose_getname,
1494         .poll           =       datagram_poll,
1495         .ioctl          =       rose_ioctl,
1496         .listen         =       rose_listen,
1497         .shutdown       =       sock_no_shutdown,
1498         .setsockopt     =       rose_setsockopt,
1499         .getsockopt     =       rose_getsockopt,
1500         .sendmsg        =       rose_sendmsg,
1501         .recvmsg        =       rose_recvmsg,
1502         .mmap           =       sock_no_mmap,
1503         .sendpage       =       sock_no_sendpage,
1504 };
1505
1506 static struct notifier_block rose_dev_notifier = {
1507         .notifier_call  =       rose_device_event,
1508 };
1509
1510 static struct net_device **dev_rose;
1511
1512 static struct ax25_protocol rose_pid = {
1513         .pid    = AX25_P_ROSE,
1514         .func   = rose_route_frame
1515 };
1516
1517 static struct ax25_linkfail rose_linkfail_notifier = {
1518         .func   = rose_link_failed
1519 };
1520
1521 static int __init rose_proto_init(void)
1522 {
1523         int i;
1524         int rc;
1525
1526         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1527                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1528                 rc = -EINVAL;
1529                 goto out;
1530         }
1531
1532         rc = proto_register(&rose_proto, 0);
1533         if (rc != 0)
1534                 goto out;
1535
1536         rose_callsign = null_ax25_address;
1537
1538         dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1539         if (dev_rose == NULL) {
1540                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1541                 rc = -ENOMEM;
1542                 goto out_proto_unregister;
1543         }
1544
1545         for (i = 0; i < rose_ndevs; i++) {
1546                 struct net_device *dev;
1547                 char name[IFNAMSIZ];
1548
1549                 sprintf(name, "rose%d", i);
1550                 dev = alloc_netdev(sizeof(struct net_device_stats),
1551                                    name, rose_setup);
1552                 if (!dev) {
1553                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1554                         rc = -ENOMEM;
1555                         goto fail;
1556                 }
1557                 rc = register_netdev(dev);
1558                 if (rc) {
1559                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1560                         free_netdev(dev);
1561                         goto fail;
1562                 }
1563                 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
1564                 dev_rose[i] = dev;
1565         }
1566
1567         sock_register(&rose_family_ops);
1568         register_netdevice_notifier(&rose_dev_notifier);
1569
1570         ax25_register_pid(&rose_pid);
1571         ax25_linkfail_register(&rose_linkfail_notifier);
1572
1573 #ifdef CONFIG_SYSCTL
1574         rose_register_sysctl();
1575 #endif
1576         rose_loopback_init();
1577
1578         rose_add_loopback_neigh();
1579
1580         proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1581         proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1582         proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1583         proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1584 out:
1585         return rc;
1586 fail:
1587         while (--i >= 0) {
1588                 unregister_netdev(dev_rose[i]);
1589                 free_netdev(dev_rose[i]);
1590         }
1591         kfree(dev_rose);
1592 out_proto_unregister:
1593         proto_unregister(&rose_proto);
1594         goto out;
1595 }
1596 module_init(rose_proto_init);
1597
1598 module_param(rose_ndevs, int, 0);
1599 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1600
1601 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1602 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1603 MODULE_LICENSE("GPL");
1604 MODULE_ALIAS_NETPROTO(PF_ROSE);
1605
1606 static void __exit rose_exit(void)
1607 {
1608         int i;
1609
1610         proc_net_remove(&init_net, "rose");
1611         proc_net_remove(&init_net, "rose_neigh");
1612         proc_net_remove(&init_net, "rose_nodes");
1613         proc_net_remove(&init_net, "rose_routes");
1614         rose_loopback_clear();
1615
1616         rose_rt_free();
1617
1618         ax25_protocol_release(AX25_P_ROSE);
1619         ax25_linkfail_release(&rose_linkfail_notifier);
1620
1621         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1622                 ax25_listen_release(&rose_callsign, NULL);
1623
1624 #ifdef CONFIG_SYSCTL
1625         rose_unregister_sysctl();
1626 #endif
1627         unregister_netdevice_notifier(&rose_dev_notifier);
1628
1629         sock_unregister(PF_ROSE);
1630
1631         for (i = 0; i < rose_ndevs; i++) {
1632                 struct net_device *dev = dev_rose[i];
1633
1634                 if (dev) {
1635                         unregister_netdev(dev);
1636                         free_netdev(dev);
1637                 }
1638         }
1639
1640         kfree(dev_rose);
1641         proto_unregister(&rose_proto);
1642 }
1643
1644 module_exit(rose_exit);