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/ax25.h>
  30 #include <linux/inet.h>
  31 #include <linux/netdevice.h>
  32 #include <linux/if_arp.h>
  33 #include <linux/skbuff.h>
  34 #include <net/sock.h>
  35 #include <asm/system.h>
  36 #include <asm/uaccess.h>
  37 #include <linux/fcntl.h>
  38 #include <linux/termios.h>
  39 #include <linux/mm.h>
  40 #include <linux/interrupt.h>
  41 #include <linux/notifier.h>
  42 #include <net/rose.h>
  43 #include <linux/proc_fs.h>
  44 #include <linux/seq_file.h>
  45 #include <net/tcp_states.h>
  46 #include <net/ip.h>
  47 #include <net/arp.h>
  48
  49 static int rose_ndevs = 10;
  50
  51 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
  52 int sysctl_rose_call_request_timeout    = ROSE_DEFAULT_T1;
  53 int sysctl_rose_reset_request_timeout   = ROSE_DEFAULT_T2;
  54 int sysctl_rose_clear_request_timeout   = ROSE_DEFAULT_T3;
  55 int sysctl_rose_no_activity_timeout     = ROSE_DEFAULT_IDLE;
  56 int sysctl_rose_ack_hold_back_timeout   = ROSE_DEFAULT_HB;
  57 int sysctl_rose_routing_control         = ROSE_DEFAULT_ROUTING;
  58 int sysctl_rose_link_fail_timeout       = ROSE_DEFAULT_FAIL_TIMEOUT;
  59 int sysctl_rose_maximum_vcs             = ROSE_DEFAULT_MAXVC;
  60 int sysctl_rose_window_size             = ROSE_DEFAULT_WINDOW_SIZE;
  61
  62 static HLIST_HEAD(rose_list);
  63 static DEFINE_SPINLOCK(rose_list_lock);
  64
  65 static struct proto_ops rose_proto_ops;
  66
  67 ax25_address rose_callsign;
  68
  69 /*
  70  * ROSE network devices are virtual network devices encapsulating ROSE
  71  * frames into AX.25 which will be sent through an AX.25 device, so form a
  72  * special "super class" of normal net devices; split their locks off into a
  73  * separate class since they always nest.
  74  */
  75 static struct lock_class_key rose_netdev_xmit_lock_key;
  76
  77 /*
  78  *      Convert a ROSE address into text.
  79  */
  80 const char *rose2asc(const rose_address *addr)
  81 {
  82         static char buffer[11];
  83
  84         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
  85             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
  86             addr->rose_addr[4] == 0x00) {
  87                 strcpy(buffer, "*");
  88         } else {
  89                 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
  90                                                 addr->rose_addr[1] & 0xFF,
  91                                                 addr->rose_addr[2] & 0xFF,
  92                                                 addr->rose_addr[3] & 0xFF,
  93                                                 addr->rose_addr[4] & 0xFF);
  94         }
  95
  96         return buffer;
  97 }
  98
  99 /*
 100  *      Compare two ROSE addresses, 0 == equal.
 101  */
 102 int rosecmp(rose_address *addr1, rose_address *addr2)
 103 {
 104         int i;
 105
 106         for (i = 0; i < 5; i++)
 107                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
 108                         return 1;
 109
 110         return 0;
 111 }
 112
 113 /*
 114  *      Compare two ROSE addresses for only mask digits, 0 == equal.
 115  */
 116 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 117 {
 118         int i, j;
 119
 120         if (mask > 10)
 121                 return 1;
 122
 123         for (i = 0; i < mask; i++) {
 124                 j = i / 2;
 125
 126                 if ((i % 2) != 0) {
 127                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
 128                                 return 1;
 129                 } else {
 130                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
 131                                 return 1;
 132                 }
 133         }
 134
 135         return 0;
 136 }
 137
 138 /*
 139  *      Socket removal during an interrupt is now safe.
 140  */
 141 static void rose_remove_socket(struct sock *sk)
 142 {
 143         spin_lock_bh(&rose_list_lock);
 144         sk_del_node_init(sk);
 145         spin_unlock_bh(&rose_list_lock);
 146 }
 147
 148 /*
 149  *      Kill all bound sockets on a broken link layer connection to a
 150  *      particular neighbour.
 151  */
 152 void rose_kill_by_neigh(struct rose_neigh *neigh)
 153 {
 154         struct sock *s;
 155         struct hlist_node *node;
 156
 157         spin_lock_bh(&rose_list_lock);
 158         sk_for_each(s, node, &rose_list) {
 159                 struct rose_sock *rose = rose_sk(s);
 160
 161                 if (rose->neighbour == neigh) {
 162                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 163                         rose->neighbour->use--;
 164                         rose->neighbour = NULL;
 165                 }
 166         }
 167         spin_unlock_bh(&rose_list_lock);
 168 }
 169
 170 /*
 171  *      Kill all bound sockets on a dropped device.
 172  */
 173 static void rose_kill_by_device(struct net_device *dev)
 174 {
 175         struct sock *s;
 176         struct hlist_node *node;
 177
 178         spin_lock_bh(&rose_list_lock);
 179         sk_for_each(s, node, &rose_list) {
 180                 struct rose_sock *rose = rose_sk(s);
 181
 182                 if (rose->device == dev) {
 183                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 184                         rose->neighbour->use--;
 185                         rose->device = NULL;
 186                 }
 187         }
 188         spin_unlock_bh(&rose_list_lock);
 189 }
 190
 191 /*
 192  *      Handle device status changes.
 193  */
 194 static int rose_device_event(struct notifier_block *this, unsigned long event,
 195         void *ptr)
 196 {
 197         struct net_device *dev = (struct net_device *)ptr;
 198
 199         if (event != NETDEV_DOWN)
 200                 return NOTIFY_DONE;
 201
 202         switch (dev->type) {
 203         case ARPHRD_ROSE:
 204                 rose_kill_by_device(dev);
 205                 break;
 206         case ARPHRD_AX25:
 207                 rose_link_device_down(dev);
 208                 rose_rt_device_down(dev);
 209                 break;
 210         }
 211
 212         return NOTIFY_DONE;
 213 }
 214
 215 /*
 216  *      Add a socket to the bound sockets list.
 217  */
 218 static void rose_insert_socket(struct sock *sk)
 219 {
 220
 221         spin_lock_bh(&rose_list_lock);
 222         sk_add_node(sk, &rose_list);
 223         spin_unlock_bh(&rose_list_lock);
 224 }
 225
 226 /*
 227  *      Find a socket that wants to accept the Call Request we just
 228  *      received.
 229  */
 230 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 231 {
 232         struct sock *s;
 233         struct hlist_node *node;
 234
 235         spin_lock_bh(&rose_list_lock);
 236         sk_for_each(s, node, &rose_list) {
 237                 struct rose_sock *rose = rose_sk(s);
 238
 239                 if (!rosecmp(&rose->source_addr, addr) &&
 240                     !ax25cmp(&rose->source_call, call) &&
 241                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 242                         goto found;
 243         }
 244
 245         sk_for_each(s, node, &rose_list) {
 246                 struct rose_sock *rose = rose_sk(s);
 247
 248                 if (!rosecmp(&rose->source_addr, addr) &&
 249                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 250                     s->sk_state == TCP_LISTEN)
 251                         goto found;
 252         }
 253         s = NULL;
 254 found:
 255         spin_unlock_bh(&rose_list_lock);
 256         return s;
 257 }
 258
 259 /*
 260  *      Find a connected ROSE socket given my LCI and device.
 261  */
 262 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 263 {
 264         struct sock *s;
 265         struct hlist_node *node;
 266
 267         spin_lock_bh(&rose_list_lock);
 268         sk_for_each(s, node, &rose_list) {
 269                 struct rose_sock *rose = rose_sk(s);
 270
 271                 if (rose->lci == lci && rose->neighbour == neigh)
 272                         goto found;
 273         }
 274         s = NULL;
 275 found:
 276         spin_unlock_bh(&rose_list_lock);
 277         return s;
 278 }
 279
 280 /*
 281  *      Find a unique LCI for a given device.
 282  */
 283 unsigned int rose_new_lci(struct rose_neigh *neigh)
 284 {
 285         int lci;
 286
 287         if (neigh->dce_mode) {
 288                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 289                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 290                                 return lci;
 291         } else {
 292                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 293                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 294                                 return lci;
 295         }
 296
 297         return 0;
 298 }
 299
 300 /*
 301  *      Deferred destroy.
 302  */
 303 void rose_destroy_socket(struct sock *);
 304
 305 /*
 306  *      Handler for deferred kills.
 307  */
 308 static void rose_destroy_timer(unsigned long data)
 309 {
 310         rose_destroy_socket((struct sock *)data);
 311 }
 312
 313 /*
 314  *      This is called from user mode and the timers. Thus it protects itself
 315  *      against interrupt users but doesn't worry about being called during
 316  *      work.  Once it is removed from the queue no interrupt or bottom half
 317  *      will touch it and we are (fairly 8-) ) safe.
 318  */
 319 void rose_destroy_socket(struct sock *sk)
 320 {
 321         struct sk_buff *skb;
 322
 323         rose_remove_socket(sk);
 324         rose_stop_heartbeat(sk);
 325         rose_stop_idletimer(sk);
 326         rose_stop_timer(sk);
 327
 328         rose_clear_queues(sk);          /* Flush the queues */
 329
 330         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 331                 if (skb->sk != sk) {    /* A pending connection */
 332                         /* Queue the unaccepted socket for death */
 333                         sock_set_flag(skb->sk, SOCK_DEAD);
 334                         rose_start_heartbeat(skb->sk);
 335                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 336                 }
 337
 338                 kfree_skb(skb);
 339         }
 340
 341         if (atomic_read(&sk->sk_wmem_alloc) ||
 342             atomic_read(&sk->sk_rmem_alloc)) {
 343                 /* Defer: outstanding buffers */
 344                 init_timer(&sk->sk_timer);
 345                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 346                 sk->sk_timer.function = rose_destroy_timer;
 347                 sk->sk_timer.data     = (unsigned long)sk;
 348                 add_timer(&sk->sk_timer);
 349         } else
 350                 sock_put(sk);
 351 }
 352
 353 /*
 354  *      Handling for system calls applied via the various interfaces to a
 355  *      ROSE socket object.
 356  */
 357
 358 static int rose_setsockopt(struct socket *sock, int level, int optname,
 359         char __user *optval, int optlen)
 360 {
 361         struct sock *sk = sock->sk;
 362         struct rose_sock *rose = rose_sk(sk);
 363         int opt;
 364
 365         if (level != SOL_ROSE)
 366                 return -ENOPROTOOPT;
 367
 368         if (optlen < sizeof(int))
 369                 return -EINVAL;
 370
 371         if (get_user(opt, (int __user *)optval))
 372                 return -EFAULT;
 373
 374         switch (optname) {
 375         case ROSE_DEFER:
 376                 rose->defer = opt ? 1 : 0;
 377                 return 0;
 378
 379         case ROSE_T1:
 380                 if (opt < 1)
 381                         return -EINVAL;
 382                 rose->t1 = opt * HZ;
 383                 return 0;
 384
 385         case ROSE_T2:
 386                 if (opt < 1)
 387                         return -EINVAL;
 388                 rose->t2 = opt * HZ;
 389                 return 0;
 390
 391         case ROSE_T3:
 392                 if (opt < 1)
 393                         return -EINVAL;
 394                 rose->t3 = opt * HZ;
 395                 return 0;
 396
 397         case ROSE_HOLDBACK:
 398                 if (opt < 1)
 399                         return -EINVAL;
 400                 rose->hb = opt * HZ;
 401                 return 0;
 402
 403         case ROSE_IDLE:
 404                 if (opt < 0)
 405                         return -EINVAL;
 406                 rose->idle = opt * 60 * HZ;
 407                 return 0;
 408
 409         case ROSE_QBITINCL:
 410                 rose->qbitincl = opt ? 1 : 0;
 411                 return 0;
 412
 413         default:
 414                 return -ENOPROTOOPT;
 415         }
 416 }
 417
 418 static int rose_getsockopt(struct socket *sock, int level, int optname,
 419         char __user *optval, int __user *optlen)
 420 {
 421         struct sock *sk = sock->sk;
 422         struct rose_sock *rose = rose_sk(sk);
 423         int val = 0;
 424         int len;
 425
 426         if (level != SOL_ROSE)
 427                 return -ENOPROTOOPT;
 428
 429         if (get_user(len, optlen))
 430                 return -EFAULT;
 431
 432         if (len < 0)
 433                 return -EINVAL;
 434
 435         switch (optname) {
 436         case ROSE_DEFER:
 437                 val = rose->defer;
 438                 break;
 439
 440         case ROSE_T1:
 441                 val = rose->t1 / HZ;
 442                 break;
 443
 444         case ROSE_T2:
 445                 val = rose->t2 / HZ;
 446                 break;
 447
 448         case ROSE_T3:
 449                 val = rose->t3 / HZ;
 450                 break;
 451
 452         case ROSE_HOLDBACK:
 453                 val = rose->hb / HZ;
 454                 break;
 455
 456         case ROSE_IDLE:
 457                 val = rose->idle / (60 * HZ);
 458                 break;
 459
 460         case ROSE_QBITINCL:
 461                 val = rose->qbitincl;
 462                 break;
 463
 464         default:
 465                 return -ENOPROTOOPT;
 466         }
 467
 468         len = min_t(unsigned int, len, sizeof(int));
 469
 470         if (put_user(len, optlen))
 471                 return -EFAULT;
 472
 473         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 474 }
 475
 476 static int rose_listen(struct socket *sock, int backlog)
 477 {
 478         struct sock *sk = sock->sk;
 479
 480         if (sk->sk_state != TCP_LISTEN) {
 481                 struct rose_sock *rose = rose_sk(sk);
 482
 483                 rose->dest_ndigis = 0;
 484                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 485                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 486                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 487                 sk->sk_max_ack_backlog = backlog;
 488                 sk->sk_state           = TCP_LISTEN;
 489                 return 0;
 490         }
 491
 492         return -EOPNOTSUPP;
 493 }
 494
 495 static struct proto rose_proto = {
 496         .name     = "ROSE",
 497         .owner    = THIS_MODULE,
 498         .obj_size = sizeof(struct rose_sock),
 499 };
 500
 501 static int rose_create(struct socket *sock, int protocol)
 502 {
 503         struct sock *sk;
 504         struct rose_sock *rose;
 505
 506         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 507                 return -ESOCKTNOSUPPORT;
 508
 509         if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
 510                 return -ENOMEM;
 511
 512         rose = rose_sk(sk);
 513
 514         sock_init_data(sock, sk);
 515
 516         skb_queue_head_init(&rose->ack_queue);
 517 #ifdef M_BIT
 518         skb_queue_head_init(&rose->frag_queue);
 519         rose->fraglen    = 0;
 520 #endif
 521
 522         sock->ops    = &rose_proto_ops;
 523         sk->sk_protocol = protocol;
 524
 525         init_timer(&rose->timer);
 526         init_timer(&rose->idletimer);
 527
 528         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 529         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 530         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 531         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 532         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 533
 534         rose->state = ROSE_STATE_0;
 535
 536         return 0;
 537 }
 538
 539 static struct sock *rose_make_new(struct sock *osk)
 540 {
 541         struct sock *sk;
 542         struct rose_sock *rose, *orose;
 543
 544         if (osk->sk_type != SOCK_SEQPACKET)
 545                 return NULL;
 546
 547         if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
 548                 return NULL;
 549
 550         rose = rose_sk(sk);
 551
 552         sock_init_data(NULL, sk);
 553
 554         skb_queue_head_init(&rose->ack_queue);
 555 #ifdef M_BIT
 556         skb_queue_head_init(&rose->frag_queue);
 557         rose->fraglen  = 0;
 558 #endif
 559
 560         sk->sk_type     = osk->sk_type;
 561         sk->sk_socket   = osk->sk_socket;
 562         sk->sk_priority = osk->sk_priority;
 563         sk->sk_protocol = osk->sk_protocol;
 564         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 565         sk->sk_sndbuf   = osk->sk_sndbuf;
 566         sk->sk_state    = TCP_ESTABLISHED;
 567         sk->sk_sleep    = osk->sk_sleep;
 568         sock_copy_flags(sk, osk);
 569
 570         init_timer(&rose->timer);
 571         init_timer(&rose->idletimer);
 572
 573         orose           = rose_sk(osk);
 574         rose->t1        = orose->t1;
 575         rose->t2        = orose->t2;
 576         rose->t3        = orose->t3;
 577         rose->hb        = orose->hb;
 578         rose->idle      = orose->idle;
 579         rose->defer     = orose->defer;
 580         rose->device    = orose->device;
 581         rose->qbitincl  = orose->qbitincl;
 582
 583         return sk;
 584 }
 585
 586 static int rose_release(struct socket *sock)
 587 {
 588         struct sock *sk = sock->sk;
 589         struct rose_sock *rose;
 590
 591         if (sk == NULL) return 0;
 592
 593         rose = rose_sk(sk);
 594
 595         switch (rose->state) {
 596         case ROSE_STATE_0:
 597                 rose_disconnect(sk, 0, -1, -1);
 598                 rose_destroy_socket(sk);
 599                 break;
 600
 601         case ROSE_STATE_2:
 602                 rose->neighbour->use--;
 603                 rose_disconnect(sk, 0, -1, -1);
 604                 rose_destroy_socket(sk);
 605                 break;
 606
 607         case ROSE_STATE_1:
 608         case ROSE_STATE_3:
 609         case ROSE_STATE_4:
 610         case ROSE_STATE_5:
 611                 rose_clear_queues(sk);
 612                 rose_stop_idletimer(sk);
 613                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 614                 rose_start_t3timer(sk);
 615                 rose->state  = ROSE_STATE_2;
 616                 sk->sk_state    = TCP_CLOSE;
 617                 sk->sk_shutdown |= SEND_SHUTDOWN;
 618                 sk->sk_state_change(sk);
 619                 sock_set_flag(sk, SOCK_DEAD);
 620                 sock_set_flag(sk, SOCK_DESTROY);
 621                 break;
 622
 623         default:
 624                 break;
 625         }
 626
 627         sock->sk = NULL;
 628
 629         return 0;
 630 }
 631
 632 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 633 {
 634         struct sock *sk = sock->sk;
 635         struct rose_sock *rose = rose_sk(sk);
 636         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 637         struct net_device *dev;
 638         ax25_address *source;
 639         ax25_uid_assoc *user;
 640         int n;
 641
 642         if (!sock_flag(sk, SOCK_ZAPPED))
 643                 return -EINVAL;
 644
 645         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 646                 return -EINVAL;
 647
 648         if (addr->srose_family != AF_ROSE)
 649                 return -EINVAL;
 650
 651         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 652                 return -EINVAL;
 653
 654         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 655                 return -EINVAL;
 656
 657         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
 658                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
 659                 return -EADDRNOTAVAIL;
 660         }
 661
 662         source = &addr->srose_call;
 663
 664         user = ax25_findbyuid(current->euid);
 665         if (user) {
 666                 rose->source_call = user->call;
 667                 ax25_uid_put(user);
 668         } else {
 669                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 670                         return -EACCES;
 671                 rose->source_call   = *source;
 672         }
 673
 674         rose->source_addr   = addr->srose_addr;
 675         rose->device        = dev;
 676         rose->source_ndigis = addr->srose_ndigis;
 677
 678         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 679                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 680                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 681                         rose->source_digis[n] = full_addr->srose_digis[n];
 682         } else {
 683                 if (rose->source_ndigis == 1) {
 684                         rose->source_digis[0] = addr->srose_digi;
 685                 }
 686         }
 687
 688         rose_insert_socket(sk);
 689
 690         sock_reset_flag(sk, SOCK_ZAPPED);
 691         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
 692         return 0;
 693 }
 694
 695 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 696 {
 697         struct sock *sk = sock->sk;
 698         struct rose_sock *rose = rose_sk(sk);
 699         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 700         unsigned char cause, diagnostic;
 701         struct net_device *dev;
 702         ax25_uid_assoc *user;
 703         int n, err = 0;
 704
 705         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 706                 return -EINVAL;
 707
 708         if (addr->srose_family != AF_ROSE)
 709                 return -EINVAL;
 710
 711         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 712                 return -EINVAL;
 713
 714         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 715                 return -EINVAL;
 716
 717         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 718         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 719                 return -EINVAL;
 720
 721         lock_sock(sk);
 722
 723         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 724                 /* Connect completed during a ERESTARTSYS event */
 725                 sock->state = SS_CONNECTED;
 726                 goto out_release;
 727         }
 728
 729         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 730                 sock->state = SS_UNCONNECTED;
 731                 err = -ECONNREFUSED;
 732                 goto out_release;
 733         }
 734
 735         if (sk->sk_state == TCP_ESTABLISHED) {
 736                 /* No reconnect on a seqpacket socket */
 737                 err = -EISCONN;
 738                 goto out_release;
 739         }
 740
 741         sk->sk_state   = TCP_CLOSE;
 742         sock->state = SS_UNCONNECTED;
 743
 744         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 745                                          &diagnostic);
 746         if (!rose->neighbour)
 747                 return -ENETUNREACH;
 748
 749         rose->lci = rose_new_lci(rose->neighbour);
 750         if (!rose->lci) {
 751                 err = -ENETUNREACH;
 752                 goto out_release;
 753         }
 754
 755         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 756                 sock_reset_flag(sk, SOCK_ZAPPED);
 757
 758                 if ((dev = rose_dev_first()) == NULL) {
 759                         err = -ENETUNREACH;
 760                         goto out_release;
 761                 }
 762
 763                 user = ax25_findbyuid(current->euid);
 764                 if (!user) {
 765                         err = -EINVAL;
 766                         goto out_release;
 767                 }
 768
 769                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 770                 rose->source_call = user->call;
 771                 rose->device      = dev;
 772                 ax25_uid_put(user);
 773
 774                 rose_insert_socket(sk);         /* Finish the bind */
 775         }
 776 rose_try_next_neigh:
 777         rose->dest_addr   = addr->srose_addr;
 778         rose->dest_call   = addr->srose_call;
 779         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 780         rose->dest_ndigis = addr->srose_ndigis;
 781
 782         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 783                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 784                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 785                         rose->dest_digis[n] = full_addr->srose_digis[n];
 786         } else {
 787                 if (rose->dest_ndigis == 1) {
 788                         rose->dest_digis[0] = addr->srose_digi;
 789                 }
 790         }
 791
 792         /* Move to connecting socket, start sending Connect Requests */
 793         sock->state   = SS_CONNECTING;
 794         sk->sk_state     = TCP_SYN_SENT;
 795
 796         rose->state = ROSE_STATE_1;
 797
 798         rose->neighbour->use++;
 799
 800         rose_write_internal(sk, ROSE_CALL_REQUEST);
 801         rose_start_heartbeat(sk);
 802         rose_start_t1timer(sk);
 803
 804         /* Now the loop */
 805         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
 806                 err = -EINPROGRESS;
 807                 goto out_release;
 808         }
 809
 810         /*
 811          * A Connect Ack with Choke or timeout or failed routing will go to
 812          * closed.
 813          */
 814         if (sk->sk_state == TCP_SYN_SENT) {
 815                 DEFINE_WAIT(wait);
 816
 817                 for (;;) {
 818                         prepare_to_wait(sk->sk_sleep, &wait,
 819                                         TASK_INTERRUPTIBLE);
 820                         if (sk->sk_state != TCP_SYN_SENT)
 821                                 break;
 822                         if (!signal_pending(current)) {
 823                                 release_sock(sk);
 824                                 schedule();
 825                                 lock_sock(sk);
 826                                 continue;
 827                         }
 828                         err = -ERESTARTSYS;
 829                         break;
 830                 }
 831                 finish_wait(sk->sk_sleep, &wait);
 832
 833                 if (err)
 834                         goto out_release;
 835         }
 836
 837         if (sk->sk_state != TCP_ESTABLISHED) {
 838         /* Try next neighbour */
 839                 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic);
 840                 if (rose->neighbour)
 841                         goto rose_try_next_neigh;
 842
 843                 /* No more neighbours */
 844                 sock->state = SS_UNCONNECTED;
 845                 err = sock_error(sk);   /* Always set at this point */
 846                 goto out_release;
 847         }
 848
 849         sock->state = SS_CONNECTED;
 850
 851 out_release:
 852         release_sock(sk);
 853
 854         return err;
 855 }
 856
 857 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 858 {
 859         struct sk_buff *skb;
 860         struct sock *newsk;
 861         DEFINE_WAIT(wait);
 862         struct sock *sk;
 863         int err = 0;
 864
 865         if ((sk = sock->sk) == NULL)
 866                 return -EINVAL;
 867
 868         lock_sock(sk);
 869         if (sk->sk_type != SOCK_SEQPACKET) {
 870                 err = -EOPNOTSUPP;
 871                 goto out_release;
 872         }
 873
 874         if (sk->sk_state != TCP_LISTEN) {
 875                 err = -EINVAL;
 876                 goto out_release;
 877         }
 878
 879         /*
 880          *      The write queue this time is holding sockets ready to use
 881          *      hooked into the SABM we saved
 882          */
 883         for (;;) {
 884                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 885
 886                 skb = skb_dequeue(&sk->sk_receive_queue);
 887                 if (skb)
 888                         break;
 889
 890                 if (flags & O_NONBLOCK) {
 891                         err = -EWOULDBLOCK;
 892                         break;
 893                 }
 894                 if (!signal_pending(current)) {
 895                         release_sock(sk);
 896                         schedule();
 897                         lock_sock(sk);
 898                         continue;
 899                 }
 900                 err = -ERESTARTSYS;
 901                 break;
 902         }
 903         finish_wait(sk->sk_sleep, &wait);
 904         if (err)
 905                 goto out_release;
 906
 907         newsk = skb->sk;
 908         newsk->sk_socket = newsock;
 909         newsk->sk_sleep = &newsock->wait;
 910
 911         /* Now attach up the new socket */
 912         skb->sk = NULL;
 913         kfree_skb(skb);
 914         sk->sk_ack_backlog--;
 915         newsock->sk = newsk;
 916
 917 out_release:
 918         release_sock(sk);
 919
 920         return err;
 921 }
 922
 923 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 924         int *uaddr_len, int peer)
 925 {
 926         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 927         struct sock *sk = sock->sk;
 928         struct rose_sock *rose = rose_sk(sk);
 929         int n;
 930
 931         if (peer != 0) {
 932                 if (sk->sk_state != TCP_ESTABLISHED)
 933                         return -ENOTCONN;
 934                 srose->srose_family = AF_ROSE;
 935                 srose->srose_addr   = rose->dest_addr;
 936                 srose->srose_call   = rose->dest_call;
 937                 srose->srose_ndigis = rose->dest_ndigis;
 938                 for (n = 0; n < rose->dest_ndigis; n++)
 939                         srose->srose_digis[n] = rose->dest_digis[n];
 940         } else {
 941                 srose->srose_family = AF_ROSE;
 942                 srose->srose_addr   = rose->source_addr;
 943                 srose->srose_call   = rose->source_call;
 944                 srose->srose_ndigis = rose->source_ndigis;
 945                 for (n = 0; n < rose->source_ndigis; n++)
 946                         srose->srose_digis[n] = rose->source_digis[n];
 947         }
 948
 949         *uaddr_len = sizeof(struct full_sockaddr_rose);
 950         return 0;
 951 }
 952
 953 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 954 {
 955         struct sock *sk;
 956         struct sock *make;
 957         struct rose_sock *make_rose;
 958         struct rose_facilities_struct facilities;
 959         int n, len;
 960
 961         skb->sk = NULL;         /* Initially we don't know who it's for */
 962
 963         /*
 964          *      skb->data points to the rose frame start
 965          */
 966         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 967
 968         len  = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
 969         len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
 970         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
 971                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 972                 return 0;
 973         }
 974
 975         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
 976
 977         /*
 978          * We can't accept the Call Request.
 979          */
 980         if (sk == NULL || sk_acceptq_is_full(sk) ||
 981             (make = rose_make_new(sk)) == NULL) {
 982                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
 983                 return 0;
 984         }
 985
 986         skb->sk     = make;
 987         make->sk_state = TCP_ESTABLISHED;
 988         make_rose = rose_sk(make);
 989
 990         make_rose->lci           = lci;
 991         make_rose->dest_addr     = facilities.dest_addr;
 992         make_rose->dest_call     = facilities.dest_call;
 993         make_rose->dest_ndigis   = facilities.dest_ndigis;
 994         for (n = 0 ; n < facilities.dest_ndigis ; n++)
 995                 make_rose->dest_digis[n] = facilities.dest_digis[n];
 996         make_rose->source_addr   = facilities.source_addr;
 997         make_rose->source_call   = facilities.source_call;
 998         make_rose->source_ndigis = facilities.source_ndigis;
 999         for (n = 0 ; n < facilities.source_ndigis ; n++)
1000                 make_rose->source_digis[n]= facilities.source_digis[n];
1001         make_rose->neighbour     = neigh;
1002         make_rose->device        = dev;
1003         make_rose->facilities    = facilities;
1004
1005         make_rose->neighbour->use++;
1006
1007         if (rose_sk(sk)->defer) {
1008                 make_rose->state = ROSE_STATE_5;
1009         } else {
1010                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1011                 make_rose->state = ROSE_STATE_3;
1012                 rose_start_idletimer(make);
1013         }
1014
1015         make_rose->condition = 0x00;
1016         make_rose->vs        = 0;
1017         make_rose->va        = 0;
1018         make_rose->vr        = 0;
1019         make_rose->vl        = 0;
1020         sk->sk_ack_backlog++;
1021
1022         rose_insert_socket(make);
1023
1024         skb_queue_head(&sk->sk_receive_queue, skb);
1025
1026         rose_start_heartbeat(make);
1027
1028         if (!sock_flag(sk, SOCK_DEAD))
1029                 sk->sk_data_ready(sk, skb->len);
1030
1031         return 1;
1032 }
1033
1034 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1035                         struct msghdr *msg, size_t len)
1036 {
1037         struct sock *sk = sock->sk;
1038         struct rose_sock *rose = rose_sk(sk);
1039         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1040         int err;
1041         struct full_sockaddr_rose srose;
1042         struct sk_buff *skb;
1043         unsigned char *asmptr;
1044         int n, size, qbit = 0;
1045
1046         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1047                 return -EINVAL;
1048
1049         if (sock_flag(sk, SOCK_ZAPPED))
1050                 return -EADDRNOTAVAIL;
1051
1052         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1053                 send_sig(SIGPIPE, current, 0);
1054                 return -EPIPE;
1055         }
1056
1057         if (rose->neighbour == NULL || rose->device == NULL)
1058                 return -ENETUNREACH;
1059
1060         if (usrose != NULL) {
1061                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1062                         return -EINVAL;
1063                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1064                 memcpy(&srose, usrose, msg->msg_namelen);
1065                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1066                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1067                         return -EISCONN;
1068                 if (srose.srose_ndigis != rose->dest_ndigis)
1069                         return -EISCONN;
1070                 if (srose.srose_ndigis == rose->dest_ndigis) {
1071                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1072                                 if (ax25cmp(&rose->dest_digis[n],
1073                                             &srose.srose_digis[n]))
1074                                         return -EISCONN;
1075                 }
1076                 if (srose.srose_family != AF_ROSE)
1077                         return -EINVAL;
1078         } else {
1079                 if (sk->sk_state != TCP_ESTABLISHED)
1080                         return -ENOTCONN;
1081
1082                 srose.srose_family = AF_ROSE;
1083                 srose.srose_addr   = rose->dest_addr;
1084                 srose.srose_call   = rose->dest_call;
1085                 srose.srose_ndigis = rose->dest_ndigis;
1086                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1087                         srose.srose_digis[n] = rose->dest_digis[n];
1088         }
1089
1090         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1091
1092         /* Build a packet */
1093         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1094         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1095
1096         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1097                 return err;
1098
1099         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1100
1101         /*
1102          *      Put the data on the end
1103          */
1104         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1105
1106         skb_reset_transport_header(skb);
1107         skb_put(skb, len);
1108
1109         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1110         if (err) {
1111                 kfree_skb(skb);
1112                 return err;
1113         }
1114
1115         /*
1116          *      If the Q BIT Include socket option is in force, the first
1117          *      byte of the user data is the logical value of the Q Bit.
1118          */
1119         if (rose->qbitincl) {
1120                 qbit = skb->data[0];
1121                 skb_pull(skb, 1);
1122         }
1123
1124         /*
1125          *      Push down the ROSE header
1126          */
1127         asmptr = skb_push(skb, ROSE_MIN_LEN);
1128
1129         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1130
1131         /* Build a ROSE Network header */
1132         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1133         asmptr[1] = (rose->lci >> 0) & 0xFF;
1134         asmptr[2] = ROSE_DATA;
1135
1136         if (qbit)
1137                 asmptr[0] |= ROSE_Q_BIT;
1138
1139         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1140
1141         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1142
1143         if (sk->sk_state != TCP_ESTABLISHED) {
1144                 kfree_skb(skb);
1145                 return -ENOTCONN;
1146         }
1147
1148 #ifdef M_BIT
1149 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1150         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1151                 unsigned char header[ROSE_MIN_LEN];
1152                 struct sk_buff *skbn;
1153                 int frontlen;
1154                 int lg;
1155
1156                 /* Save a copy of the Header */
1157                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1158                 skb_pull(skb, ROSE_MIN_LEN);
1159
1160                 frontlen = skb_headroom(skb);
1161
1162                 while (skb->len > 0) {
1163                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1164                                 kfree_skb(skb);
1165                                 return err;
1166                         }
1167
1168                         skbn->sk   = sk;
1169                         skbn->free = 1;
1170                         skbn->arp  = 1;
1171
1172                         skb_reserve(skbn, frontlen);
1173
1174                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1175
1176                         /* Copy the user data */
1177                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1178                         skb_pull(skb, lg);
1179
1180                         /* Duplicate the Header */
1181                         skb_push(skbn, ROSE_MIN_LEN);
1182                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1183
1184                         if (skb->len > 0)
1185                                 skbn->data[2] |= M_BIT;
1186
1187                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1188                 }
1189
1190                 skb->free = 1;
1191                 kfree_skb(skb);
1192         } else {
1193                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1194         }
1195 #else
1196         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1197 #endif
1198
1199         rose_kick(sk);
1200
1201         return len;
1202 }
1203
1204
1205 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1206                         struct msghdr *msg, size_t size, int flags)
1207 {
1208         struct sock *sk = sock->sk;
1209         struct rose_sock *rose = rose_sk(sk);
1210         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1211         size_t copied;
1212         unsigned char *asmptr;
1213         struct sk_buff *skb;
1214         int n, er, qbit;
1215
1216         /*
1217          * This works for seqpacket too. The receiver has ordered the queue for
1218          * us! We do one quick check first though
1219          */
1220         if (sk->sk_state != TCP_ESTABLISHED)
1221                 return -ENOTCONN;
1222
1223         /* Now we can treat all alike */
1224         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1225                 return er;
1226
1227         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1228
1229         skb_pull(skb, ROSE_MIN_LEN);
1230
1231         if (rose->qbitincl) {
1232                 asmptr  = skb_push(skb, 1);
1233                 *asmptr = qbit;
1234         }
1235
1236         skb_reset_transport_header(skb);
1237         copied     = skb->len;
1238
1239         if (copied > size) {
1240                 copied = size;
1241                 msg->msg_flags |= MSG_TRUNC;
1242         }
1243
1244         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1245
1246         if (srose != NULL) {
1247                 srose->srose_family = AF_ROSE;
1248                 srose->srose_addr   = rose->dest_addr;
1249                 srose->srose_call   = rose->dest_call;
1250                 srose->srose_ndigis = rose->dest_ndigis;
1251                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1252                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1253                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1254                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1255                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1256                 } else {
1257                         if (rose->dest_ndigis >= 1) {
1258                                 srose->srose_ndigis = 1;
1259                                 srose->srose_digi = rose->dest_digis[0];
1260                         }
1261                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1262                 }
1263         }
1264
1265         skb_free_datagram(sk, skb);
1266
1267         return copied;
1268 }
1269
1270
1271 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1272 {
1273         struct sock *sk = sock->sk;
1274         struct rose_sock *rose = rose_sk(sk);
1275         void __user *argp = (void __user *)arg;
1276
1277         switch (cmd) {
1278         case TIOCOUTQ: {
1279                 long amount;
1280                 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1281                 if (amount < 0)
1282                         amount = 0;
1283                 return put_user(amount, (unsigned int __user *) argp);
1284         }
1285
1286         case TIOCINQ: {
1287                 struct sk_buff *skb;
1288                 long amount = 0L;
1289                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1290                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1291                         amount = skb->len;
1292                 return put_user(amount, (unsigned int __user *) argp);
1293         }
1294
1295         case SIOCGSTAMP:
1296                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1297
1298         case SIOCGSTAMPNS:
1299                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1300
1301         case SIOCGIFADDR:
1302         case SIOCSIFADDR:
1303         case SIOCGIFDSTADDR:
1304         case SIOCSIFDSTADDR:
1305         case SIOCGIFBRDADDR:
1306         case SIOCSIFBRDADDR:
1307         case SIOCGIFNETMASK:
1308         case SIOCSIFNETMASK:
1309         case SIOCGIFMETRIC:
1310         case SIOCSIFMETRIC:
1311                 return -EINVAL;
1312
1313         case SIOCADDRT:
1314         case SIOCDELRT:
1315         case SIOCRSCLRRT:
1316                 if (!capable(CAP_NET_ADMIN))
1317                         return -EPERM;
1318                 return rose_rt_ioctl(cmd, argp);
1319
1320         case SIOCRSGCAUSE: {
1321                 struct rose_cause_struct rose_cause;
1322                 rose_cause.cause      = rose->cause;
1323                 rose_cause.diagnostic = rose->diagnostic;
1324                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1325         }
1326
1327         case SIOCRSSCAUSE: {
1328                 struct rose_cause_struct rose_cause;
1329                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1330                         return -EFAULT;
1331                 rose->cause      = rose_cause.cause;
1332                 rose->diagnostic = rose_cause.diagnostic;
1333                 return 0;
1334         }
1335
1336         case SIOCRSSL2CALL:
1337                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1338                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1339                         ax25_listen_release(&rose_callsign, NULL);
1340                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1341                         return -EFAULT;
1342                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1343                         return ax25_listen_register(&rose_callsign, NULL);
1344
1345                 return 0;
1346
1347         case SIOCRSGL2CALL:
1348                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1349
1350         case SIOCRSACCEPT:
1351                 if (rose->state == ROSE_STATE_5) {
1352                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1353                         rose_start_idletimer(sk);
1354                         rose->condition = 0x00;
1355                         rose->vs        = 0;
1356                         rose->va        = 0;
1357                         rose->vr        = 0;
1358                         rose->vl        = 0;
1359                         rose->state     = ROSE_STATE_3;
1360                 }
1361                 return 0;
1362
1363         default:
1364                 return -ENOIOCTLCMD;
1365         }
1366
1367         return 0;
1368 }
1369
1370 #ifdef CONFIG_PROC_FS
1371 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1372 {
1373         int i;
1374         struct sock *s;
1375         struct hlist_node *node;
1376
1377         spin_lock_bh(&rose_list_lock);
1378         if (*pos == 0)
1379                 return SEQ_START_TOKEN;
1380
1381         i = 1;
1382         sk_for_each(s, node, &rose_list) {
1383                 if (i == *pos)
1384                         return s;
1385                 ++i;
1386         }
1387         return NULL;
1388 }
1389
1390 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1391 {
1392         ++*pos;
1393
1394         return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1395                 : sk_next((struct sock *)v);
1396 }
1397
1398 static void rose_info_stop(struct seq_file *seq, void *v)
1399 {
1400         spin_unlock_bh(&rose_list_lock);
1401 }
1402
1403 static int rose_info_show(struct seq_file *seq, void *v)
1404 {
1405         char buf[11];
1406
1407         if (v == SEQ_START_TOKEN)
1408                 seq_puts(seq,
1409                          "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");
1410
1411         else {
1412                 struct sock *s = v;
1413                 struct rose_sock *rose = rose_sk(s);
1414                 const char *devname, *callsign;
1415                 const struct net_device *dev = rose->device;
1416
1417                 if (!dev)
1418                         devname = "???";
1419                 else
1420                         devname = dev->name;
1421
1422                 seq_printf(seq, "%-10s %-9s ",
1423                         rose2asc(&rose->dest_addr),
1424                         ax2asc(buf, &rose->dest_call));
1425
1426                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1427                         callsign = "??????-?";
1428                 else
1429                         callsign = ax2asc(buf, &rose->source_call);
1430
1431                 seq_printf(seq,
1432                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1433                         rose2asc(&rose->source_addr),
1434                         callsign,
1435                         devname,
1436                         rose->lci & 0x0FFF,
1437                         (rose->neighbour) ? rose->neighbour->number : 0,
1438                         rose->state,
1439                         rose->vs,
1440                         rose->vr,
1441                         rose->va,
1442                         ax25_display_timer(&rose->timer) / HZ,
1443                         rose->t1 / HZ,
1444                         rose->t2 / HZ,
1445                         rose->t3 / HZ,
1446                         rose->hb / HZ,
1447                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1448                         rose->idle / (60 * HZ),
1449                         atomic_read(&s->sk_wmem_alloc),
1450                         atomic_read(&s->sk_rmem_alloc),
1451                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1452         }
1453
1454         return 0;
1455 }
1456
1457 static struct seq_operations rose_info_seqops = {
1458         .start = rose_info_start,
1459         .next = rose_info_next,
1460         .stop = rose_info_stop,
1461         .show = rose_info_show,
1462 };
1463
1464 static int rose_info_open(struct inode *inode, struct file *file)
1465 {
1466         return seq_open(file, &rose_info_seqops);
1467 }
1468
1469 static const struct file_operations rose_info_fops = {
1470         .owner = THIS_MODULE,
1471         .open = rose_info_open,
1472         .read = seq_read,
1473         .llseek = seq_lseek,
1474         .release = seq_release,
1475 };
1476 #endif  /* CONFIG_PROC_FS */
1477
1478 static struct net_proto_family rose_family_ops = {
1479         .family         =       PF_ROSE,
1480         .create         =       rose_create,
1481         .owner          =       THIS_MODULE,
1482 };
1483
1484 static struct proto_ops rose_proto_ops = {
1485         .family         =       PF_ROSE,
1486         .owner          =       THIS_MODULE,
1487         .release        =       rose_release,
1488         .bind           =       rose_bind,
1489         .connect        =       rose_connect,
1490         .socketpair     =       sock_no_socketpair,
1491         .accept         =       rose_accept,
1492         .getname        =       rose_getname,
1493         .poll           =       datagram_poll,
1494         .ioctl          =       rose_ioctl,
1495         .listen         =       rose_listen,
1496         .shutdown       =       sock_no_shutdown,
1497         .setsockopt     =       rose_setsockopt,
1498         .getsockopt     =       rose_getsockopt,
1499         .sendmsg        =       rose_sendmsg,
1500         .recvmsg        =       rose_recvmsg,
1501         .mmap           =       sock_no_mmap,
1502         .sendpage       =       sock_no_sendpage,
1503 };
1504
1505 static struct notifier_block rose_dev_notifier = {
1506         .notifier_call  =       rose_device_event,
1507 };
1508
1509 static struct net_device **dev_rose;
1510
1511 static struct ax25_protocol rose_pid = {
1512         .pid    = AX25_P_ROSE,
1513         .func   = rose_route_frame
1514 };
1515
1516 static struct ax25_linkfail rose_linkfail_notifier = {
1517         .func   = rose_link_failed
1518 };
1519
1520 static int __init rose_proto_init(void)
1521 {
1522         int i;
1523         int rc;
1524
1525         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1526                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1527                 rc = -EINVAL;
1528                 goto out;
1529         }
1530
1531         rc = proto_register(&rose_proto, 0);
1532         if (rc != 0)
1533                 goto out;
1534
1535         rose_callsign = null_ax25_address;
1536
1537         dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1538         if (dev_rose == NULL) {
1539                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1540                 rc = -ENOMEM;
1541                 goto out_proto_unregister;
1542         }
1543
1544         for (i = 0; i < rose_ndevs; i++) {
1545                 struct net_device *dev;
1546                 char name[IFNAMSIZ];
1547
1548                 sprintf(name, "rose%d", i);
1549                 dev = alloc_netdev(sizeof(struct net_device_stats),
1550                                    name, rose_setup);
1551                 if (!dev) {
1552                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1553                         rc = -ENOMEM;
1554                         goto fail;
1555                 }
1556                 rc = register_netdev(dev);
1557                 if (rc) {
1558                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1559                         free_netdev(dev);
1560                         goto fail;
1561                 }
1562                 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
1563                 dev_rose[i] = dev;
1564         }
1565
1566         sock_register(&rose_family_ops);
1567         register_netdevice_notifier(&rose_dev_notifier);
1568
1569         ax25_register_pid(&rose_pid);
1570         ax25_linkfail_register(&rose_linkfail_notifier);
1571
1572 #ifdef CONFIG_SYSCTL
1573         rose_register_sysctl();
1574 #endif
1575         rose_loopback_init();
1576
1577         rose_add_loopback_neigh();
1578
1579         proc_net_fops_create("rose", S_IRUGO, &rose_info_fops);
1580         proc_net_fops_create("rose_neigh", S_IRUGO, &rose_neigh_fops);
1581         proc_net_fops_create("rose_nodes", S_IRUGO, &rose_nodes_fops);
1582         proc_net_fops_create("rose_routes", S_IRUGO, &rose_routes_fops);
1583 out:
1584         return rc;
1585 fail:
1586         while (--i >= 0) {
1587                 unregister_netdev(dev_rose[i]);
1588                 free_netdev(dev_rose[i]);
1589         }
1590         kfree(dev_rose);
1591 out_proto_unregister:
1592         proto_unregister(&rose_proto);
1593         goto out;
1594 }
1595 module_init(rose_proto_init);
1596
1597 module_param(rose_ndevs, int, 0);
1598 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1599
1600 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1601 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1602 MODULE_LICENSE("GPL");
1603 MODULE_ALIAS_NETPROTO(PF_ROSE);
1604
1605 static void __exit rose_exit(void)
1606 {
1607         int i;
1608
1609         proc_net_remove("rose");
1610         proc_net_remove("rose_neigh");
1611         proc_net_remove("rose_nodes");
1612         proc_net_remove("rose_routes");
1613         rose_loopback_clear();
1614
1615         rose_rt_free();
1616
1617         ax25_protocol_release(AX25_P_ROSE);
1618         ax25_linkfail_release(&rose_linkfail_notifier);
1619
1620         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1621                 ax25_listen_release(&rose_callsign, NULL);
1622
1623 #ifdef CONFIG_SYSCTL
1624         rose_unregister_sysctl();
1625 #endif
1626         unregister_netdevice_notifier(&rose_dev_notifier);
1627
1628         sock_unregister(PF_ROSE);
1629
1630         for (i = 0; i < rose_ndevs; i++) {
1631                 struct net_device *dev = dev_rose[i];
1632
1633                 if (dev) {
1634                         unregister_netdev(dev);
1635                         free_netdev(dev);
1636                 }
1637         }
1638
1639         kfree(dev_rose);
1640         proto_unregister(&rose_proto);
1641 }
1642
1643 module_exit(rose_exit);