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 (dev->nd_net != &init_net)
 201                 return NOTIFY_DONE;
 202
 203         if (event != NETDEV_DOWN)
 204                 return NOTIFY_DONE;
 205
 206         switch (dev->type) {
 207         case ARPHRD_ROSE:
 208                 rose_kill_by_device(dev);
 209                 break;
 210         case ARPHRD_AX25:
 211                 rose_link_device_down(dev);
 212                 rose_rt_device_down(dev);
 213                 break;
 214         }
 215
 216         return NOTIFY_DONE;
 217 }
 218
 219 /*
 220  *      Add a socket to the bound sockets list.
 221  */
 222 static void rose_insert_socket(struct sock *sk)
 223 {
 224
 225         spin_lock_bh(&rose_list_lock);
 226         sk_add_node(sk, &rose_list);
 227         spin_unlock_bh(&rose_list_lock);
 228 }
 229
 230 /*
 231  *      Find a socket that wants to accept the Call Request we just
 232  *      received.
 233  */
 234 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 235 {
 236         struct sock *s;
 237         struct hlist_node *node;
 238
 239         spin_lock_bh(&rose_list_lock);
 240         sk_for_each(s, node, &rose_list) {
 241                 struct rose_sock *rose = rose_sk(s);
 242
 243                 if (!rosecmp(&rose->source_addr, addr) &&
 244                     !ax25cmp(&rose->source_call, call) &&
 245                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 246                         goto found;
 247         }
 248
 249         sk_for_each(s, node, &rose_list) {
 250                 struct rose_sock *rose = rose_sk(s);
 251
 252                 if (!rosecmp(&rose->source_addr, addr) &&
 253                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 254                     s->sk_state == TCP_LISTEN)
 255                         goto found;
 256         }
 257         s = NULL;
 258 found:
 259         spin_unlock_bh(&rose_list_lock);
 260         return s;
 261 }
 262
 263 /*
 264  *      Find a connected ROSE socket given my LCI and device.
 265  */
 266 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 267 {
 268         struct sock *s;
 269         struct hlist_node *node;
 270
 271         spin_lock_bh(&rose_list_lock);
 272         sk_for_each(s, node, &rose_list) {
 273                 struct rose_sock *rose = rose_sk(s);
 274
 275                 if (rose->lci == lci && rose->neighbour == neigh)
 276                         goto found;
 277         }
 278         s = NULL;
 279 found:
 280         spin_unlock_bh(&rose_list_lock);
 281         return s;
 282 }
 283
 284 /*
 285  *      Find a unique LCI for a given device.
 286  */
 287 unsigned int rose_new_lci(struct rose_neigh *neigh)
 288 {
 289         int lci;
 290
 291         if (neigh->dce_mode) {
 292                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 293                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 294                                 return lci;
 295         } else {
 296                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 297                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 298                                 return lci;
 299         }
 300
 301         return 0;
 302 }
 303
 304 /*
 305  *      Deferred destroy.
 306  */
 307 void rose_destroy_socket(struct sock *);
 308
 309 /*
 310  *      Handler for deferred kills.
 311  */
 312 static void rose_destroy_timer(unsigned long data)
 313 {
 314         rose_destroy_socket((struct sock *)data);
 315 }
 316
 317 /*
 318  *      This is called from user mode and the timers. Thus it protects itself
 319  *      against interrupt users but doesn't worry about being called during
 320  *      work.  Once it is removed from the queue no interrupt or bottom half
 321  *      will touch it and we are (fairly 8-) ) safe.
 322  */
 323 void rose_destroy_socket(struct sock *sk)
 324 {
 325         struct sk_buff *skb;
 326
 327         rose_remove_socket(sk);
 328         rose_stop_heartbeat(sk);
 329         rose_stop_idletimer(sk);
 330         rose_stop_timer(sk);
 331
 332         rose_clear_queues(sk);          /* Flush the queues */
 333
 334         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 335                 if (skb->sk != sk) {    /* A pending connection */
 336                         /* Queue the unaccepted socket for death */
 337                         sock_set_flag(skb->sk, SOCK_DEAD);
 338                         rose_start_heartbeat(skb->sk);
 339                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 340                 }
 341
 342                 kfree_skb(skb);
 343         }
 344
 345         if (atomic_read(&sk->sk_wmem_alloc) ||
 346             atomic_read(&sk->sk_rmem_alloc)) {
 347                 /* Defer: outstanding buffers */
 348                 init_timer(&sk->sk_timer);
 349                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 350                 sk->sk_timer.function = rose_destroy_timer;
 351                 sk->sk_timer.data     = (unsigned long)sk;
 352                 add_timer(&sk->sk_timer);
 353         } else
 354                 sock_put(sk);
 355 }
 356
 357 /*
 358  *      Handling for system calls applied via the various interfaces to a
 359  *      ROSE socket object.
 360  */
 361
 362 static int rose_setsockopt(struct socket *sock, int level, int optname,
 363         char __user *optval, int optlen)
 364 {
 365         struct sock *sk = sock->sk;
 366         struct rose_sock *rose = rose_sk(sk);
 367         int opt;
 368
 369         if (level != SOL_ROSE)
 370                 return -ENOPROTOOPT;
 371
 372         if (optlen < sizeof(int))
 373                 return -EINVAL;
 374
 375         if (get_user(opt, (int __user *)optval))
 376                 return -EFAULT;
 377
 378         switch (optname) {
 379         case ROSE_DEFER:
 380                 rose->defer = opt ? 1 : 0;
 381                 return 0;
 382
 383         case ROSE_T1:
 384                 if (opt < 1)
 385                         return -EINVAL;
 386                 rose->t1 = opt * HZ;
 387                 return 0;
 388
 389         case ROSE_T2:
 390                 if (opt < 1)
 391                         return -EINVAL;
 392                 rose->t2 = opt * HZ;
 393                 return 0;
 394
 395         case ROSE_T3:
 396                 if (opt < 1)
 397                         return -EINVAL;
 398                 rose->t3 = opt * HZ;
 399                 return 0;
 400
 401         case ROSE_HOLDBACK:
 402                 if (opt < 1)
 403                         return -EINVAL;
 404                 rose->hb = opt * HZ;
 405                 return 0;
 406
 407         case ROSE_IDLE:
 408                 if (opt < 0)
 409                         return -EINVAL;
 410                 rose->idle = opt * 60 * HZ;
 411                 return 0;
 412
 413         case ROSE_QBITINCL:
 414                 rose->qbitincl = opt ? 1 : 0;
 415                 return 0;
 416
 417         default:
 418                 return -ENOPROTOOPT;
 419         }
 420 }
 421
 422 static int rose_getsockopt(struct socket *sock, int level, int optname,
 423         char __user *optval, int __user *optlen)
 424 {
 425         struct sock *sk = sock->sk;
 426         struct rose_sock *rose = rose_sk(sk);
 427         int val = 0;
 428         int len;
 429
 430         if (level != SOL_ROSE)
 431                 return -ENOPROTOOPT;
 432
 433         if (get_user(len, optlen))
 434                 return -EFAULT;
 435
 436         if (len < 0)
 437                 return -EINVAL;
 438
 439         switch (optname) {
 440         case ROSE_DEFER:
 441                 val = rose->defer;
 442                 break;
 443
 444         case ROSE_T1:
 445                 val = rose->t1 / HZ;
 446                 break;
 447
 448         case ROSE_T2:
 449                 val = rose->t2 / HZ;
 450                 break;
 451
 452         case ROSE_T3:
 453                 val = rose->t3 / HZ;
 454                 break;
 455
 456         case ROSE_HOLDBACK:
 457                 val = rose->hb / HZ;
 458                 break;
 459
 460         case ROSE_IDLE:
 461                 val = rose->idle / (60 * HZ);
 462                 break;
 463
 464         case ROSE_QBITINCL:
 465                 val = rose->qbitincl;
 466                 break;
 467
 468         default:
 469                 return -ENOPROTOOPT;
 470         }
 471
 472         len = min_t(unsigned int, len, sizeof(int));
 473
 474         if (put_user(len, optlen))
 475                 return -EFAULT;
 476
 477         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 478 }
 479
 480 static int rose_listen(struct socket *sock, int backlog)
 481 {
 482         struct sock *sk = sock->sk;
 483
 484         if (sk->sk_state != TCP_LISTEN) {
 485                 struct rose_sock *rose = rose_sk(sk);
 486
 487                 rose->dest_ndigis = 0;
 488                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 489                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 490                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 491                 sk->sk_max_ack_backlog = backlog;
 492                 sk->sk_state           = TCP_LISTEN;
 493                 return 0;
 494         }
 495
 496         return -EOPNOTSUPP;
 497 }
 498
 499 static struct proto rose_proto = {
 500         .name     = "ROSE",
 501         .owner    = THIS_MODULE,
 502         .obj_size = sizeof(struct rose_sock),
 503 };
 504
 505 static int rose_create(struct net *net, struct socket *sock, int protocol)
 506 {
 507         struct sock *sk;
 508         struct rose_sock *rose;
 509
 510         if (net != &init_net)
 511                 return -EAFNOSUPPORT;
 512
 513         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 514                 return -ESOCKTNOSUPPORT;
 515
 516         if ((sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
 517                 return -ENOMEM;
 518
 519         rose = rose_sk(sk);
 520
 521         sock_init_data(sock, sk);
 522
 523         skb_queue_head_init(&rose->ack_queue);
 524 #ifdef M_BIT
 525         skb_queue_head_init(&rose->frag_queue);
 526         rose->fraglen    = 0;
 527 #endif
 528
 529         sock->ops    = &rose_proto_ops;
 530         sk->sk_protocol = protocol;
 531
 532         init_timer(&rose->timer);
 533         init_timer(&rose->idletimer);
 534
 535         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 536         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 537         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 538         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 539         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 540
 541         rose->state = ROSE_STATE_0;
 542
 543         return 0;
 544 }
 545
 546 static struct sock *rose_make_new(struct sock *osk)
 547 {
 548         struct sock *sk;
 549         struct rose_sock *rose, *orose;
 550
 551         if (osk->sk_type != SOCK_SEQPACKET)
 552                 return NULL;
 553
 554         if ((sk = sk_alloc(osk->sk_net, PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
 555                 return NULL;
 556
 557         rose = rose_sk(sk);
 558
 559         sock_init_data(NULL, sk);
 560
 561         skb_queue_head_init(&rose->ack_queue);
 562 #ifdef M_BIT
 563         skb_queue_head_init(&rose->frag_queue);
 564         rose->fraglen  = 0;
 565 #endif
 566
 567         sk->sk_type     = osk->sk_type;
 568         sk->sk_socket   = osk->sk_socket;
 569         sk->sk_priority = osk->sk_priority;
 570         sk->sk_protocol = osk->sk_protocol;
 571         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 572         sk->sk_sndbuf   = osk->sk_sndbuf;
 573         sk->sk_state    = TCP_ESTABLISHED;
 574         sk->sk_sleep    = osk->sk_sleep;
 575         sock_copy_flags(sk, osk);
 576
 577         init_timer(&rose->timer);
 578         init_timer(&rose->idletimer);
 579
 580         orose           = rose_sk(osk);
 581         rose->t1        = orose->t1;
 582         rose->t2        = orose->t2;
 583         rose->t3        = orose->t3;
 584         rose->hb        = orose->hb;
 585         rose->idle      = orose->idle;
 586         rose->defer     = orose->defer;
 587         rose->device    = orose->device;
 588         rose->qbitincl  = orose->qbitincl;
 589
 590         return sk;
 591 }
 592
 593 static int rose_release(struct socket *sock)
 594 {
 595         struct sock *sk = sock->sk;
 596         struct rose_sock *rose;
 597
 598         if (sk == NULL) return 0;
 599
 600         rose = rose_sk(sk);
 601
 602         switch (rose->state) {
 603         case ROSE_STATE_0:
 604                 rose_disconnect(sk, 0, -1, -1);
 605                 rose_destroy_socket(sk);
 606                 break;
 607
 608         case ROSE_STATE_2:
 609                 rose->neighbour->use--;
 610                 rose_disconnect(sk, 0, -1, -1);
 611                 rose_destroy_socket(sk);
 612                 break;
 613
 614         case ROSE_STATE_1:
 615         case ROSE_STATE_3:
 616         case ROSE_STATE_4:
 617         case ROSE_STATE_5:
 618                 rose_clear_queues(sk);
 619                 rose_stop_idletimer(sk);
 620                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 621                 rose_start_t3timer(sk);
 622                 rose->state  = ROSE_STATE_2;
 623                 sk->sk_state    = TCP_CLOSE;
 624                 sk->sk_shutdown |= SEND_SHUTDOWN;
 625                 sk->sk_state_change(sk);
 626                 sock_set_flag(sk, SOCK_DEAD);
 627                 sock_set_flag(sk, SOCK_DESTROY);
 628                 break;
 629
 630         default:
 631                 break;
 632         }
 633
 634         sock->sk = NULL;
 635
 636         return 0;
 637 }
 638
 639 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 640 {
 641         struct sock *sk = sock->sk;
 642         struct rose_sock *rose = rose_sk(sk);
 643         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 644         struct net_device *dev;
 645         ax25_address *source;
 646         ax25_uid_assoc *user;
 647         int n;
 648
 649         if (!sock_flag(sk, SOCK_ZAPPED))
 650                 return -EINVAL;
 651
 652         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 653                 return -EINVAL;
 654
 655         if (addr->srose_family != AF_ROSE)
 656                 return -EINVAL;
 657
 658         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 659                 return -EINVAL;
 660
 661         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 662                 return -EINVAL;
 663
 664         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
 665                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
 666                 return -EADDRNOTAVAIL;
 667         }
 668
 669         source = &addr->srose_call;
 670
 671         user = ax25_findbyuid(current->euid);
 672         if (user) {
 673                 rose->source_call = user->call;
 674                 ax25_uid_put(user);
 675         } else {
 676                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 677                         return -EACCES;
 678                 rose->source_call   = *source;
 679         }
 680
 681         rose->source_addr   = addr->srose_addr;
 682         rose->device        = dev;
 683         rose->source_ndigis = addr->srose_ndigis;
 684
 685         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 686                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 687                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 688                         rose->source_digis[n] = full_addr->srose_digis[n];
 689         } else {
 690                 if (rose->source_ndigis == 1) {
 691                         rose->source_digis[0] = addr->srose_digi;
 692                 }
 693         }
 694
 695         rose_insert_socket(sk);
 696
 697         sock_reset_flag(sk, SOCK_ZAPPED);
 698         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
 699         return 0;
 700 }
 701
 702 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 703 {
 704         struct sock *sk = sock->sk;
 705         struct rose_sock *rose = rose_sk(sk);
 706         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 707         unsigned char cause, diagnostic;
 708         struct net_device *dev;
 709         ax25_uid_assoc *user;
 710         int n, err = 0;
 711
 712         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 713                 return -EINVAL;
 714
 715         if (addr->srose_family != AF_ROSE)
 716                 return -EINVAL;
 717
 718         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 719                 return -EINVAL;
 720
 721         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 722                 return -EINVAL;
 723
 724         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 725         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 726                 return -EINVAL;
 727
 728         lock_sock(sk);
 729
 730         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 731                 /* Connect completed during a ERESTARTSYS event */
 732                 sock->state = SS_CONNECTED;
 733                 goto out_release;
 734         }
 735
 736         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 737                 sock->state = SS_UNCONNECTED;
 738                 err = -ECONNREFUSED;
 739                 goto out_release;
 740         }
 741
 742         if (sk->sk_state == TCP_ESTABLISHED) {
 743                 /* No reconnect on a seqpacket socket */
 744                 err = -EISCONN;
 745                 goto out_release;
 746         }
 747
 748         sk->sk_state   = TCP_CLOSE;
 749         sock->state = SS_UNCONNECTED;
 750
 751         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 752                                          &diagnostic);
 753         if (!rose->neighbour)
 754                 return -ENETUNREACH;
 755
 756         rose->lci = rose_new_lci(rose->neighbour);
 757         if (!rose->lci) {
 758                 err = -ENETUNREACH;
 759                 goto out_release;
 760         }
 761
 762         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 763                 sock_reset_flag(sk, SOCK_ZAPPED);
 764
 765                 if ((dev = rose_dev_first()) == NULL) {
 766                         err = -ENETUNREACH;
 767                         goto out_release;
 768                 }
 769
 770                 user = ax25_findbyuid(current->euid);
 771                 if (!user) {
 772                         err = -EINVAL;
 773                         goto out_release;
 774                 }
 775
 776                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 777                 rose->source_call = user->call;
 778                 rose->device      = dev;
 779                 ax25_uid_put(user);
 780
 781                 rose_insert_socket(sk);         /* Finish the bind */
 782         }
 783 rose_try_next_neigh:
 784         rose->dest_addr   = addr->srose_addr;
 785         rose->dest_call   = addr->srose_call;
 786         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 787         rose->dest_ndigis = addr->srose_ndigis;
 788
 789         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 790                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 791                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 792                         rose->dest_digis[n] = full_addr->srose_digis[n];
 793         } else {
 794                 if (rose->dest_ndigis == 1) {
 795                         rose->dest_digis[0] = addr->srose_digi;
 796                 }
 797         }
 798
 799         /* Move to connecting socket, start sending Connect Requests */
 800         sock->state   = SS_CONNECTING;
 801         sk->sk_state     = TCP_SYN_SENT;
 802
 803         rose->state = ROSE_STATE_1;
 804
 805         rose->neighbour->use++;
 806
 807         rose_write_internal(sk, ROSE_CALL_REQUEST);
 808         rose_start_heartbeat(sk);
 809         rose_start_t1timer(sk);
 810
 811         /* Now the loop */
 812         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
 813                 err = -EINPROGRESS;
 814                 goto out_release;
 815         }
 816
 817         /*
 818          * A Connect Ack with Choke or timeout or failed routing will go to
 819          * closed.
 820          */
 821         if (sk->sk_state == TCP_SYN_SENT) {
 822                 DEFINE_WAIT(wait);
 823
 824                 for (;;) {
 825                         prepare_to_wait(sk->sk_sleep, &wait,
 826                                         TASK_INTERRUPTIBLE);
 827                         if (sk->sk_state != TCP_SYN_SENT)
 828                                 break;
 829                         if (!signal_pending(current)) {
 830                                 release_sock(sk);
 831                                 schedule();
 832                                 lock_sock(sk);
 833                                 continue;
 834                         }
 835                         err = -ERESTARTSYS;
 836                         break;
 837                 }
 838                 finish_wait(sk->sk_sleep, &wait);
 839
 840                 if (err)
 841                         goto out_release;
 842         }
 843
 844         if (sk->sk_state != TCP_ESTABLISHED) {
 845         /* Try next neighbour */
 846                 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic);
 847                 if (rose->neighbour)
 848                         goto rose_try_next_neigh;
 849
 850                 /* No more neighbours */
 851                 sock->state = SS_UNCONNECTED;
 852                 err = sock_error(sk);   /* Always set at this point */
 853                 goto out_release;
 854         }
 855
 856         sock->state = SS_CONNECTED;
 857
 858 out_release:
 859         release_sock(sk);
 860
 861         return err;
 862 }
 863
 864 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 865 {
 866         struct sk_buff *skb;
 867         struct sock *newsk;
 868         DEFINE_WAIT(wait);
 869         struct sock *sk;
 870         int err = 0;
 871
 872         if ((sk = sock->sk) == NULL)
 873                 return -EINVAL;
 874
 875         lock_sock(sk);
 876         if (sk->sk_type != SOCK_SEQPACKET) {
 877                 err = -EOPNOTSUPP;
 878                 goto out_release;
 879         }
 880
 881         if (sk->sk_state != TCP_LISTEN) {
 882                 err = -EINVAL;
 883                 goto out_release;
 884         }
 885
 886         /*
 887          *      The write queue this time is holding sockets ready to use
 888          *      hooked into the SABM we saved
 889          */
 890         for (;;) {
 891                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 892
 893                 skb = skb_dequeue(&sk->sk_receive_queue);
 894                 if (skb)
 895                         break;
 896
 897                 if (flags & O_NONBLOCK) {
 898                         err = -EWOULDBLOCK;
 899                         break;
 900                 }
 901                 if (!signal_pending(current)) {
 902                         release_sock(sk);
 903                         schedule();
 904                         lock_sock(sk);
 905                         continue;
 906                 }
 907                 err = -ERESTARTSYS;
 908                 break;
 909         }
 910         finish_wait(sk->sk_sleep, &wait);
 911         if (err)
 912                 goto out_release;
 913
 914         newsk = skb->sk;
 915         newsk->sk_socket = newsock;
 916         newsk->sk_sleep = &newsock->wait;
 917
 918         /* Now attach up the new socket */
 919         skb->sk = NULL;
 920         kfree_skb(skb);
 921         sk->sk_ack_backlog--;
 922         newsock->sk = newsk;
 923
 924 out_release:
 925         release_sock(sk);
 926
 927         return err;
 928 }
 929
 930 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 931         int *uaddr_len, int peer)
 932 {
 933         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 934         struct sock *sk = sock->sk;
 935         struct rose_sock *rose = rose_sk(sk);
 936         int n;
 937
 938         if (peer != 0) {
 939                 if (sk->sk_state != TCP_ESTABLISHED)
 940                         return -ENOTCONN;
 941                 srose->srose_family = AF_ROSE;
 942                 srose->srose_addr   = rose->dest_addr;
 943                 srose->srose_call   = rose->dest_call;
 944                 srose->srose_ndigis = rose->dest_ndigis;
 945                 for (n = 0; n < rose->dest_ndigis; n++)
 946                         srose->srose_digis[n] = rose->dest_digis[n];
 947         } else {
 948                 srose->srose_family = AF_ROSE;
 949                 srose->srose_addr   = rose->source_addr;
 950                 srose->srose_call   = rose->source_call;
 951                 srose->srose_ndigis = rose->source_ndigis;
 952                 for (n = 0; n < rose->source_ndigis; n++)
 953                         srose->srose_digis[n] = rose->source_digis[n];
 954         }
 955
 956         *uaddr_len = sizeof(struct full_sockaddr_rose);
 957         return 0;
 958 }
 959
 960 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 961 {
 962         struct sock *sk;
 963         struct sock *make;
 964         struct rose_sock *make_rose;
 965         struct rose_facilities_struct facilities;
 966         int n, len;
 967
 968         skb->sk = NULL;         /* Initially we don't know who it's for */
 969
 970         /*
 971          *      skb->data points to the rose frame start
 972          */
 973         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 974
 975         len  = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
 976         len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
 977         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
 978                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 979                 return 0;
 980         }
 981
 982         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
 983
 984         /*
 985          * We can't accept the Call Request.
 986          */
 987         if (sk == NULL || sk_acceptq_is_full(sk) ||
 988             (make = rose_make_new(sk)) == NULL) {
 989                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
 990                 return 0;
 991         }
 992
 993         skb->sk     = make;
 994         make->sk_state = TCP_ESTABLISHED;
 995         make_rose = rose_sk(make);
 996
 997         make_rose->lci           = lci;
 998         make_rose->dest_addr     = facilities.dest_addr;
 999         make_rose->dest_call     = facilities.dest_call;
1000         make_rose->dest_ndigis   = facilities.dest_ndigis;
1001         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1002                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1003         make_rose->source_addr   = facilities.source_addr;
1004         make_rose->source_call   = facilities.source_call;
1005         make_rose->source_ndigis = facilities.source_ndigis;
1006         for (n = 0 ; n < facilities.source_ndigis ; n++)
1007                 make_rose->source_digis[n]= facilities.source_digis[n];
1008         make_rose->neighbour     = neigh;
1009         make_rose->device        = dev;
1010         make_rose->facilities    = facilities;
1011
1012         make_rose->neighbour->use++;
1013
1014         if (rose_sk(sk)->defer) {
1015                 make_rose->state = ROSE_STATE_5;
1016         } else {
1017                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1018                 make_rose->state = ROSE_STATE_3;
1019                 rose_start_idletimer(make);
1020         }
1021
1022         make_rose->condition = 0x00;
1023         make_rose->vs        = 0;
1024         make_rose->va        = 0;
1025         make_rose->vr        = 0;
1026         make_rose->vl        = 0;
1027         sk->sk_ack_backlog++;
1028
1029         rose_insert_socket(make);
1030
1031         skb_queue_head(&sk->sk_receive_queue, skb);
1032
1033         rose_start_heartbeat(make);
1034
1035         if (!sock_flag(sk, SOCK_DEAD))
1036                 sk->sk_data_ready(sk, skb->len);
1037
1038         return 1;
1039 }
1040
1041 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1042                         struct msghdr *msg, size_t len)
1043 {
1044         struct sock *sk = sock->sk;
1045         struct rose_sock *rose = rose_sk(sk);
1046         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1047         int err;
1048         struct full_sockaddr_rose srose;
1049         struct sk_buff *skb;
1050         unsigned char *asmptr;
1051         int n, size, qbit = 0;
1052
1053         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1054                 return -EINVAL;
1055
1056         if (sock_flag(sk, SOCK_ZAPPED))
1057                 return -EADDRNOTAVAIL;
1058
1059         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1060                 send_sig(SIGPIPE, current, 0);
1061                 return -EPIPE;
1062         }
1063
1064         if (rose->neighbour == NULL || rose->device == NULL)
1065                 return -ENETUNREACH;
1066
1067         if (usrose != NULL) {
1068                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1069                         return -EINVAL;
1070                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1071                 memcpy(&srose, usrose, msg->msg_namelen);
1072                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1073                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1074                         return -EISCONN;
1075                 if (srose.srose_ndigis != rose->dest_ndigis)
1076                         return -EISCONN;
1077                 if (srose.srose_ndigis == rose->dest_ndigis) {
1078                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1079                                 if (ax25cmp(&rose->dest_digis[n],
1080                                             &srose.srose_digis[n]))
1081                                         return -EISCONN;
1082                 }
1083                 if (srose.srose_family != AF_ROSE)
1084                         return -EINVAL;
1085         } else {
1086                 if (sk->sk_state != TCP_ESTABLISHED)
1087                         return -ENOTCONN;
1088
1089                 srose.srose_family = AF_ROSE;
1090                 srose.srose_addr   = rose->dest_addr;
1091                 srose.srose_call   = rose->dest_call;
1092                 srose.srose_ndigis = rose->dest_ndigis;
1093                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1094                         srose.srose_digis[n] = rose->dest_digis[n];
1095         }
1096
1097         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1098
1099         /* Build a packet */
1100         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1101         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1102
1103         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1104                 return err;
1105
1106         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1107
1108         /*
1109          *      Put the data on the end
1110          */
1111         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1112
1113         skb_reset_transport_header(skb);
1114         skb_put(skb, len);
1115
1116         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1117         if (err) {
1118                 kfree_skb(skb);
1119                 return err;
1120         }
1121
1122         /*
1123          *      If the Q BIT Include socket option is in force, the first
1124          *      byte of the user data is the logical value of the Q Bit.
1125          */
1126         if (rose->qbitincl) {
1127                 qbit = skb->data[0];
1128                 skb_pull(skb, 1);
1129         }
1130
1131         /*
1132          *      Push down the ROSE header
1133          */
1134         asmptr = skb_push(skb, ROSE_MIN_LEN);
1135
1136         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1137
1138         /* Build a ROSE Network header */
1139         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1140         asmptr[1] = (rose->lci >> 0) & 0xFF;
1141         asmptr[2] = ROSE_DATA;
1142
1143         if (qbit)
1144                 asmptr[0] |= ROSE_Q_BIT;
1145
1146         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1147
1148         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1149
1150         if (sk->sk_state != TCP_ESTABLISHED) {
1151                 kfree_skb(skb);
1152                 return -ENOTCONN;
1153         }
1154
1155 #ifdef M_BIT
1156 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1157         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1158                 unsigned char header[ROSE_MIN_LEN];
1159                 struct sk_buff *skbn;
1160                 int frontlen;
1161                 int lg;
1162
1163                 /* Save a copy of the Header */
1164                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1165                 skb_pull(skb, ROSE_MIN_LEN);
1166
1167                 frontlen = skb_headroom(skb);
1168
1169                 while (skb->len > 0) {
1170                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1171                                 kfree_skb(skb);
1172                                 return err;
1173                         }
1174
1175                         skbn->sk   = sk;
1176                         skbn->free = 1;
1177                         skbn->arp  = 1;
1178
1179                         skb_reserve(skbn, frontlen);
1180
1181                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1182
1183                         /* Copy the user data */
1184                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1185                         skb_pull(skb, lg);
1186
1187                         /* Duplicate the Header */
1188                         skb_push(skbn, ROSE_MIN_LEN);
1189                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1190
1191                         if (skb->len > 0)
1192                                 skbn->data[2] |= M_BIT;
1193
1194                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1195                 }
1196
1197                 skb->free = 1;
1198                 kfree_skb(skb);
1199         } else {
1200                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1201         }
1202 #else
1203         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1204 #endif
1205
1206         rose_kick(sk);
1207
1208         return len;
1209 }
1210
1211
1212 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1213                         struct msghdr *msg, size_t size, int flags)
1214 {
1215         struct sock *sk = sock->sk;
1216         struct rose_sock *rose = rose_sk(sk);
1217         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1218         size_t copied;
1219         unsigned char *asmptr;
1220         struct sk_buff *skb;
1221         int n, er, qbit;
1222
1223         /*
1224          * This works for seqpacket too. The receiver has ordered the queue for
1225          * us! We do one quick check first though
1226          */
1227         if (sk->sk_state != TCP_ESTABLISHED)
1228                 return -ENOTCONN;
1229
1230         /* Now we can treat all alike */
1231         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1232                 return er;
1233
1234         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1235
1236         skb_pull(skb, ROSE_MIN_LEN);
1237
1238         if (rose->qbitincl) {
1239                 asmptr  = skb_push(skb, 1);
1240                 *asmptr = qbit;
1241         }
1242
1243         skb_reset_transport_header(skb);
1244         copied     = skb->len;
1245
1246         if (copied > size) {
1247                 copied = size;
1248                 msg->msg_flags |= MSG_TRUNC;
1249         }
1250
1251         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1252
1253         if (srose != NULL) {
1254                 srose->srose_family = AF_ROSE;
1255                 srose->srose_addr   = rose->dest_addr;
1256                 srose->srose_call   = rose->dest_call;
1257                 srose->srose_ndigis = rose->dest_ndigis;
1258                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1259                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1260                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1261                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1262                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1263                 } else {
1264                         if (rose->dest_ndigis >= 1) {
1265                                 srose->srose_ndigis = 1;
1266                                 srose->srose_digi = rose->dest_digis[0];
1267                         }
1268                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1269                 }
1270         }
1271
1272         skb_free_datagram(sk, skb);
1273
1274         return copied;
1275 }
1276
1277
1278 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1279 {
1280         struct sock *sk = sock->sk;
1281         struct rose_sock *rose = rose_sk(sk);
1282         void __user *argp = (void __user *)arg;
1283
1284         switch (cmd) {
1285         case TIOCOUTQ: {
1286                 long amount;
1287                 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1288                 if (amount < 0)
1289                         amount = 0;
1290                 return put_user(amount, (unsigned int __user *) argp);
1291         }
1292
1293         case TIOCINQ: {
1294                 struct sk_buff *skb;
1295                 long amount = 0L;
1296                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1297                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1298                         amount = skb->len;
1299                 return put_user(amount, (unsigned int __user *) argp);
1300         }
1301
1302         case SIOCGSTAMP:
1303                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1304
1305         case SIOCGSTAMPNS:
1306                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1307
1308         case SIOCGIFADDR:
1309         case SIOCSIFADDR:
1310         case SIOCGIFDSTADDR:
1311         case SIOCSIFDSTADDR:
1312         case SIOCGIFBRDADDR:
1313         case SIOCSIFBRDADDR:
1314         case SIOCGIFNETMASK:
1315         case SIOCSIFNETMASK:
1316         case SIOCGIFMETRIC:
1317         case SIOCSIFMETRIC:
1318                 return -EINVAL;
1319
1320         case SIOCADDRT:
1321         case SIOCDELRT:
1322         case SIOCRSCLRRT:
1323                 if (!capable(CAP_NET_ADMIN))
1324                         return -EPERM;
1325                 return rose_rt_ioctl(cmd, argp);
1326
1327         case SIOCRSGCAUSE: {
1328                 struct rose_cause_struct rose_cause;
1329                 rose_cause.cause      = rose->cause;
1330                 rose_cause.diagnostic = rose->diagnostic;
1331                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1332         }
1333
1334         case SIOCRSSCAUSE: {
1335                 struct rose_cause_struct rose_cause;
1336                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1337                         return -EFAULT;
1338                 rose->cause      = rose_cause.cause;
1339                 rose->diagnostic = rose_cause.diagnostic;
1340                 return 0;
1341         }
1342
1343         case SIOCRSSL2CALL:
1344                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1345                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1346                         ax25_listen_release(&rose_callsign, NULL);
1347                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1348                         return -EFAULT;
1349                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1350                         return ax25_listen_register(&rose_callsign, NULL);
1351
1352                 return 0;
1353
1354         case SIOCRSGL2CALL:
1355                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1356
1357         case SIOCRSACCEPT:
1358                 if (rose->state == ROSE_STATE_5) {
1359                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1360                         rose_start_idletimer(sk);
1361                         rose->condition = 0x00;
1362                         rose->vs        = 0;
1363                         rose->va        = 0;
1364                         rose->vr        = 0;
1365                         rose->vl        = 0;
1366                         rose->state     = ROSE_STATE_3;
1367                 }
1368                 return 0;
1369
1370         default:
1371                 return -ENOIOCTLCMD;
1372         }
1373
1374         return 0;
1375 }
1376
1377 #ifdef CONFIG_PROC_FS
1378 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1379 {
1380         int i;
1381         struct sock *s;
1382         struct hlist_node *node;
1383
1384         spin_lock_bh(&rose_list_lock);
1385         if (*pos == 0)
1386                 return SEQ_START_TOKEN;
1387
1388         i = 1;
1389         sk_for_each(s, node, &rose_list) {
1390                 if (i == *pos)
1391                         return s;
1392                 ++i;
1393         }
1394         return NULL;
1395 }
1396
1397 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1398 {
1399         ++*pos;
1400
1401         return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1402                 : sk_next((struct sock *)v);
1403 }
1404
1405 static void rose_info_stop(struct seq_file *seq, void *v)
1406 {
1407         spin_unlock_bh(&rose_list_lock);
1408 }
1409
1410 static int rose_info_show(struct seq_file *seq, void *v)
1411 {
1412         char buf[11];
1413
1414         if (v == SEQ_START_TOKEN)
1415                 seq_puts(seq,
1416                          "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");
1417
1418         else {
1419                 struct sock *s = v;
1420                 struct rose_sock *rose = rose_sk(s);
1421                 const char *devname, *callsign;
1422                 const struct net_device *dev = rose->device;
1423
1424                 if (!dev)
1425                         devname = "???";
1426                 else
1427                         devname = dev->name;
1428
1429                 seq_printf(seq, "%-10s %-9s ",
1430                         rose2asc(&rose->dest_addr),
1431                         ax2asc(buf, &rose->dest_call));
1432
1433                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1434                         callsign = "??????-?";
1435                 else
1436                         callsign = ax2asc(buf, &rose->source_call);
1437
1438                 seq_printf(seq,
1439                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1440                         rose2asc(&rose->source_addr),
1441                         callsign,
1442                         devname,
1443                         rose->lci & 0x0FFF,
1444                         (rose->neighbour) ? rose->neighbour->number : 0,
1445                         rose->state,
1446                         rose->vs,
1447                         rose->vr,
1448                         rose->va,
1449                         ax25_display_timer(&rose->timer) / HZ,
1450                         rose->t1 / HZ,
1451                         rose->t2 / HZ,
1452                         rose->t3 / HZ,
1453                         rose->hb / HZ,
1454                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1455                         rose->idle / (60 * HZ),
1456                         atomic_read(&s->sk_wmem_alloc),
1457                         atomic_read(&s->sk_rmem_alloc),
1458                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1459         }
1460
1461         return 0;
1462 }
1463
1464 static const struct seq_operations rose_info_seqops = {
1465         .start = rose_info_start,
1466         .next = rose_info_next,
1467         .stop = rose_info_stop,
1468         .show = rose_info_show,
1469 };
1470
1471 static int rose_info_open(struct inode *inode, struct file *file)
1472 {
1473         return seq_open(file, &rose_info_seqops);
1474 }
1475
1476 static const struct file_operations rose_info_fops = {
1477         .owner = THIS_MODULE,
1478         .open = rose_info_open,
1479         .read = seq_read,
1480         .llseek = seq_lseek,
1481         .release = seq_release,
1482 };
1483 #endif  /* CONFIG_PROC_FS */
1484
1485 static struct net_proto_family rose_family_ops = {
1486         .family         =       PF_ROSE,
1487         .create         =       rose_create,
1488         .owner          =       THIS_MODULE,
1489 };
1490
1491 static struct proto_ops rose_proto_ops = {
1492         .family         =       PF_ROSE,
1493         .owner          =       THIS_MODULE,
1494         .release        =       rose_release,
1495         .bind           =       rose_bind,
1496         .connect        =       rose_connect,
1497         .socketpair     =       sock_no_socketpair,
1498         .accept         =       rose_accept,
1499         .getname        =       rose_getname,
1500         .poll           =       datagram_poll,
1501         .ioctl          =       rose_ioctl,
1502         .listen         =       rose_listen,
1503         .shutdown       =       sock_no_shutdown,
1504         .setsockopt     =       rose_setsockopt,
1505         .getsockopt     =       rose_getsockopt,
1506         .sendmsg        =       rose_sendmsg,
1507         .recvmsg        =       rose_recvmsg,
1508         .mmap           =       sock_no_mmap,
1509         .sendpage       =       sock_no_sendpage,
1510 };
1511
1512 static struct notifier_block rose_dev_notifier = {
1513         .notifier_call  =       rose_device_event,
1514 };
1515
1516 static struct net_device **dev_rose;
1517
1518 static struct ax25_protocol rose_pid = {
1519         .pid    = AX25_P_ROSE,
1520         .func   = rose_route_frame
1521 };
1522
1523 static struct ax25_linkfail rose_linkfail_notifier = {
1524         .func   = rose_link_failed
1525 };
1526
1527 static int __init rose_proto_init(void)
1528 {
1529         int i;
1530         int rc;
1531
1532         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1533                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1534                 rc = -EINVAL;
1535                 goto out;
1536         }
1537
1538         rc = proto_register(&rose_proto, 0);
1539         if (rc != 0)
1540                 goto out;
1541
1542         rose_callsign = null_ax25_address;
1543
1544         dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1545         if (dev_rose == NULL) {
1546                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1547                 rc = -ENOMEM;
1548                 goto out_proto_unregister;
1549         }
1550
1551         for (i = 0; i < rose_ndevs; i++) {
1552                 struct net_device *dev;
1553                 char name[IFNAMSIZ];
1554
1555                 sprintf(name, "rose%d", i);
1556                 dev = alloc_netdev(sizeof(struct net_device_stats),
1557                                    name, rose_setup);
1558                 if (!dev) {
1559                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1560                         rc = -ENOMEM;
1561                         goto fail;
1562                 }
1563                 rc = register_netdev(dev);
1564                 if (rc) {
1565                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1566                         free_netdev(dev);
1567                         goto fail;
1568                 }
1569                 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
1570                 dev_rose[i] = dev;
1571         }
1572
1573         sock_register(&rose_family_ops);
1574         register_netdevice_notifier(&rose_dev_notifier);
1575
1576         ax25_register_pid(&rose_pid);
1577         ax25_linkfail_register(&rose_linkfail_notifier);
1578
1579 #ifdef CONFIG_SYSCTL
1580         rose_register_sysctl();
1581 #endif
1582         rose_loopback_init();
1583
1584         rose_add_loopback_neigh();
1585
1586         proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1587         proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1588         proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1589         proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1590 out:
1591         return rc;
1592 fail:
1593         while (--i >= 0) {
1594                 unregister_netdev(dev_rose[i]);
1595                 free_netdev(dev_rose[i]);
1596         }
1597         kfree(dev_rose);
1598 out_proto_unregister:
1599         proto_unregister(&rose_proto);
1600         goto out;
1601 }
1602 module_init(rose_proto_init);
1603
1604 module_param(rose_ndevs, int, 0);
1605 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1606
1607 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1608 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1609 MODULE_LICENSE("GPL");
1610 MODULE_ALIAS_NETPROTO(PF_ROSE);
1611
1612 static void __exit rose_exit(void)
1613 {
1614         int i;
1615
1616         proc_net_remove(&init_net, "rose");
1617         proc_net_remove(&init_net, "rose_neigh");
1618         proc_net_remove(&init_net, "rose_nodes");
1619         proc_net_remove(&init_net, "rose_routes");
1620         rose_loopback_clear();
1621
1622         rose_rt_free();
1623
1624         ax25_protocol_release(AX25_P_ROSE);
1625         ax25_linkfail_release(&rose_linkfail_notifier);
1626
1627         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1628                 ax25_listen_release(&rose_callsign, NULL);
1629
1630 #ifdef CONFIG_SYSCTL
1631         rose_unregister_sysctl();
1632 #endif
1633         unregister_netdevice_notifier(&rose_dev_notifier);
1634
1635         sock_unregister(PF_ROSE);
1636
1637         for (i = 0; i < rose_ndevs; i++) {
1638                 struct net_device *dev = dev_rose[i];
1639
1640                 if (dev) {
1641                         unregister_netdev(dev);
1642                         free_netdev(dev);
1643                 }
1644         }
1645
1646         kfree(dev_rose);
1647         proto_unregister(&rose_proto);
1648 }
1649
1650 module_exit(rose_exit);