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