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_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         sock_copy_flags(sk, osk);
 575
 576         init_timer(&rose->timer);
 577         init_timer(&rose->idletimer);
 578
 579         orose           = rose_sk(osk);
 580         rose->t1        = orose->t1;
 581         rose->t2        = orose->t2;
 582         rose->t3        = orose->t3;
 583         rose->hb        = orose->hb;
 584         rose->idle      = orose->idle;
 585         rose->defer     = orose->defer;
 586         rose->device    = orose->device;
 587         rose->qbitincl  = orose->qbitincl;
 588
 589         return sk;
 590 }
 591
 592 static int rose_release(struct socket *sock)
 593 {
 594         struct sock *sk = sock->sk;
 595         struct rose_sock *rose;
 596
 597         if (sk == NULL) return 0;
 598
 599         sock_hold(sk);
 600         sock_orphan(sk);
 601         lock_sock(sk);
 602         rose = rose_sk(sk);
 603
 604         switch (rose->state) {
 605         case ROSE_STATE_0:
 606                 release_sock(sk);
 607                 rose_disconnect(sk, 0, -1, -1);
 608                 lock_sock(sk);
 609                 rose_destroy_socket(sk);
 610                 break;
 611
 612         case ROSE_STATE_2:
 613                 rose->neighbour->use--;
 614                 release_sock(sk);
 615                 rose_disconnect(sk, 0, -1, -1);
 616                 lock_sock(sk);
 617                 rose_destroy_socket(sk);
 618                 break;
 619
 620         case ROSE_STATE_1:
 621         case ROSE_STATE_3:
 622         case ROSE_STATE_4:
 623         case ROSE_STATE_5:
 624                 rose_clear_queues(sk);
 625                 rose_stop_idletimer(sk);
 626                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 627                 rose_start_t3timer(sk);
 628                 rose->state  = ROSE_STATE_2;
 629                 sk->sk_state    = TCP_CLOSE;
 630                 sk->sk_shutdown |= SEND_SHUTDOWN;
 631                 sk->sk_state_change(sk);
 632                 sock_set_flag(sk, SOCK_DEAD);
 633                 sock_set_flag(sk, SOCK_DESTROY);
 634                 break;
 635
 636         default:
 637                 break;
 638         }
 639
 640         sock->sk = NULL;
 641         release_sock(sk);
 642         sock_put(sk);
 643
 644         return 0;
 645 }
 646
 647 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 648 {
 649         struct sock *sk = sock->sk;
 650         struct rose_sock *rose = rose_sk(sk);
 651         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 652         struct net_device *dev;
 653         ax25_address *source;
 654         ax25_uid_assoc *user;
 655         int n;
 656
 657         if (!sock_flag(sk, SOCK_ZAPPED))
 658                 return -EINVAL;
 659
 660         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 661                 return -EINVAL;
 662
 663         if (addr->srose_family != AF_ROSE)
 664                 return -EINVAL;
 665
 666         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 667                 return -EINVAL;
 668
 669         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 670                 return -EINVAL;
 671
 672         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
 673                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
 674                 return -EADDRNOTAVAIL;
 675         }
 676
 677         source = &addr->srose_call;
 678
 679         user = ax25_findbyuid(current->euid);
 680         if (user) {
 681                 rose->source_call = user->call;
 682                 ax25_uid_put(user);
 683         } else {
 684                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 685                         return -EACCES;
 686                 rose->source_call   = *source;
 687         }
 688
 689         rose->source_addr   = addr->srose_addr;
 690         rose->device        = dev;
 691         rose->source_ndigis = addr->srose_ndigis;
 692
 693         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 694                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 695                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 696                         rose->source_digis[n] = full_addr->srose_digis[n];
 697         } else {
 698                 if (rose->source_ndigis == 1) {
 699                         rose->source_digis[0] = addr->srose_digi;
 700                 }
 701         }
 702
 703         rose_insert_socket(sk);
 704
 705         sock_reset_flag(sk, SOCK_ZAPPED);
 706         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
 707         return 0;
 708 }
 709
 710 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 711 {
 712         struct sock *sk = sock->sk;
 713         struct rose_sock *rose = rose_sk(sk);
 714         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 715         unsigned char cause, diagnostic;
 716         struct net_device *dev;
 717         ax25_uid_assoc *user;
 718         int n, err = 0;
 719
 720         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 721                 return -EINVAL;
 722
 723         if (addr->srose_family != AF_ROSE)
 724                 return -EINVAL;
 725
 726         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 727                 return -EINVAL;
 728
 729         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 730                 return -EINVAL;
 731
 732         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 733         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 734                 return -EINVAL;
 735
 736         lock_sock(sk);
 737
 738         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 739                 /* Connect completed during a ERESTARTSYS event */
 740                 sock->state = SS_CONNECTED;
 741                 goto out_release;
 742         }
 743
 744         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 745                 sock->state = SS_UNCONNECTED;
 746                 err = -ECONNREFUSED;
 747                 goto out_release;
 748         }
 749
 750         if (sk->sk_state == TCP_ESTABLISHED) {
 751                 /* No reconnect on a seqpacket socket */
 752                 err = -EISCONN;
 753                 goto out_release;
 754         }
 755
 756         sk->sk_state   = TCP_CLOSE;
 757         sock->state = SS_UNCONNECTED;
 758
 759         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 760                                          &diagnostic, 0);
 761         if (!rose->neighbour) {
 762                 err = -ENETUNREACH;
 763                 goto out_release;
 764         }
 765
 766         rose->lci = rose_new_lci(rose->neighbour);
 767         if (!rose->lci) {
 768                 err = -ENETUNREACH;
 769                 goto out_release;
 770         }
 771
 772         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 773                 sock_reset_flag(sk, SOCK_ZAPPED);
 774
 775                 if ((dev = rose_dev_first()) == NULL) {
 776                         err = -ENETUNREACH;
 777                         goto out_release;
 778                 }
 779
 780                 user = ax25_findbyuid(current->euid);
 781                 if (!user) {
 782                         err = -EINVAL;
 783                         goto out_release;
 784                 }
 785
 786                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 787                 rose->source_call = user->call;
 788                 rose->device      = dev;
 789                 ax25_uid_put(user);
 790
 791                 rose_insert_socket(sk);         /* Finish the bind */
 792         }
 793 rose_try_next_neigh:
 794         rose->dest_addr   = addr->srose_addr;
 795         rose->dest_call   = addr->srose_call;
 796         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 797         rose->dest_ndigis = addr->srose_ndigis;
 798
 799         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 800                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 801                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 802                         rose->dest_digis[n] = full_addr->srose_digis[n];
 803         } else {
 804                 if (rose->dest_ndigis == 1) {
 805                         rose->dest_digis[0] = addr->srose_digi;
 806                 }
 807         }
 808
 809         /* Move to connecting socket, start sending Connect Requests */
 810         sock->state   = SS_CONNECTING;
 811         sk->sk_state     = TCP_SYN_SENT;
 812
 813         rose->state = ROSE_STATE_1;
 814
 815         rose->neighbour->use++;
 816
 817         rose_write_internal(sk, ROSE_CALL_REQUEST);
 818         rose_start_heartbeat(sk);
 819         rose_start_t1timer(sk);
 820
 821         /* Now the loop */
 822         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
 823                 err = -EINPROGRESS;
 824                 goto out_release;
 825         }
 826
 827         /*
 828          * A Connect Ack with Choke or timeout or failed routing will go to
 829          * closed.
 830          */
 831         if (sk->sk_state == TCP_SYN_SENT) {
 832                 DEFINE_WAIT(wait);
 833
 834                 for (;;) {
 835                         prepare_to_wait(sk->sk_sleep, &wait,
 836                                         TASK_INTERRUPTIBLE);
 837                         if (sk->sk_state != TCP_SYN_SENT)
 838                                 break;
 839                         if (!signal_pending(current)) {
 840                                 release_sock(sk);
 841                                 schedule();
 842                                 lock_sock(sk);
 843                                 continue;
 844                         }
 845                         err = -ERESTARTSYS;
 846                         break;
 847                 }
 848                 finish_wait(sk->sk_sleep, &wait);
 849
 850                 if (err)
 851                         goto out_release;
 852         }
 853
 854         if (sk->sk_state != TCP_ESTABLISHED) {
 855         /* Try next neighbour */
 856                 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic, 0);
 857                 if (rose->neighbour)
 858                         goto rose_try_next_neigh;
 859
 860                 /* No more neighbours */
 861                 sock->state = SS_UNCONNECTED;
 862                 err = sock_error(sk);   /* Always set at this point */
 863                 goto out_release;
 864         }
 865
 866         sock->state = SS_CONNECTED;
 867
 868 out_release:
 869         release_sock(sk);
 870
 871         return err;
 872 }
 873
 874 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 875 {
 876         struct sk_buff *skb;
 877         struct sock *newsk;
 878         DEFINE_WAIT(wait);
 879         struct sock *sk;
 880         int err = 0;
 881
 882         if ((sk = sock->sk) == NULL)
 883                 return -EINVAL;
 884
 885         lock_sock(sk);
 886         if (sk->sk_type != SOCK_SEQPACKET) {
 887                 err = -EOPNOTSUPP;
 888                 goto out_release;
 889         }
 890
 891         if (sk->sk_state != TCP_LISTEN) {
 892                 err = -EINVAL;
 893                 goto out_release;
 894         }
 895
 896         /*
 897          *      The write queue this time is holding sockets ready to use
 898          *      hooked into the SABM we saved
 899          */
 900         for (;;) {
 901                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 902
 903                 skb = skb_dequeue(&sk->sk_receive_queue);
 904                 if (skb)
 905                         break;
 906
 907                 if (flags & O_NONBLOCK) {
 908                         err = -EWOULDBLOCK;
 909                         break;
 910                 }
 911                 if (!signal_pending(current)) {
 912                         release_sock(sk);
 913                         schedule();
 914                         lock_sock(sk);
 915                         continue;
 916                 }
 917                 err = -ERESTARTSYS;
 918                 break;
 919         }
 920         finish_wait(sk->sk_sleep, &wait);
 921         if (err)
 922                 goto out_release;
 923
 924         newsk = skb->sk;
 925         sock_graft(newsk, newsock);
 926
 927         /* Now attach up the new socket */
 928         skb->sk = NULL;
 929         kfree_skb(skb);
 930         sk->sk_ack_backlog--;
 931
 932 out_release:
 933         release_sock(sk);
 934
 935         return err;
 936 }
 937
 938 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 939         int *uaddr_len, int peer)
 940 {
 941         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 942         struct sock *sk = sock->sk;
 943         struct rose_sock *rose = rose_sk(sk);
 944         int n;
 945
 946         if (peer != 0) {
 947                 if (sk->sk_state != TCP_ESTABLISHED)
 948                         return -ENOTCONN;
 949                 srose->srose_family = AF_ROSE;
 950                 srose->srose_addr   = rose->dest_addr;
 951                 srose->srose_call   = rose->dest_call;
 952                 srose->srose_ndigis = rose->dest_ndigis;
 953                 for (n = 0; n < rose->dest_ndigis; n++)
 954                         srose->srose_digis[n] = rose->dest_digis[n];
 955         } else {
 956                 srose->srose_family = AF_ROSE;
 957                 srose->srose_addr   = rose->source_addr;
 958                 srose->srose_call   = rose->source_call;
 959                 srose->srose_ndigis = rose->source_ndigis;
 960                 for (n = 0; n < rose->source_ndigis; n++)
 961                         srose->srose_digis[n] = rose->source_digis[n];
 962         }
 963
 964         *uaddr_len = sizeof(struct full_sockaddr_rose);
 965         return 0;
 966 }
 967
 968 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 969 {
 970         struct sock *sk;
 971         struct sock *make;
 972         struct rose_sock *make_rose;
 973         struct rose_facilities_struct facilities;
 974         int n, len;
 975
 976         skb->sk = NULL;         /* Initially we don't know who it's for */
 977
 978         /*
 979          *      skb->data points to the rose frame start
 980          */
 981         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 982
 983         len  = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
 984         len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
 985         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
 986                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 987                 return 0;
 988         }
 989
 990         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
 991
 992         /*
 993          * We can't accept the Call Request.
 994          */
 995         if (sk == NULL || sk_acceptq_is_full(sk) ||
 996             (make = rose_make_new(sk)) == NULL) {
 997                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
 998                 return 0;
 999         }
1000
1001         skb->sk     = make;
1002         make->sk_state = TCP_ESTABLISHED;
1003         make_rose = rose_sk(make);
1004
1005         make_rose->lci           = lci;
1006         make_rose->dest_addr     = facilities.dest_addr;
1007         make_rose->dest_call     = facilities.dest_call;
1008         make_rose->dest_ndigis   = facilities.dest_ndigis;
1009         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1010                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1011         make_rose->source_addr   = facilities.source_addr;
1012         make_rose->source_call   = facilities.source_call;
1013         make_rose->source_ndigis = facilities.source_ndigis;
1014         for (n = 0 ; n < facilities.source_ndigis ; n++)
1015                 make_rose->source_digis[n]= facilities.source_digis[n];
1016         make_rose->neighbour     = neigh;
1017         make_rose->device        = dev;
1018         make_rose->facilities    = facilities;
1019
1020         make_rose->neighbour->use++;
1021
1022         if (rose_sk(sk)->defer) {
1023                 make_rose->state = ROSE_STATE_5;
1024         } else {
1025                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1026                 make_rose->state = ROSE_STATE_3;
1027                 rose_start_idletimer(make);
1028         }
1029
1030         make_rose->condition = 0x00;
1031         make_rose->vs        = 0;
1032         make_rose->va        = 0;
1033         make_rose->vr        = 0;
1034         make_rose->vl        = 0;
1035         sk->sk_ack_backlog++;
1036
1037         rose_insert_socket(make);
1038
1039         skb_queue_head(&sk->sk_receive_queue, skb);
1040
1041         rose_start_heartbeat(make);
1042
1043         if (!sock_flag(sk, SOCK_DEAD))
1044                 sk->sk_data_ready(sk, skb->len);
1045
1046         return 1;
1047 }
1048
1049 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1050                         struct msghdr *msg, size_t len)
1051 {
1052         struct sock *sk = sock->sk;
1053         struct rose_sock *rose = rose_sk(sk);
1054         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1055         int err;
1056         struct full_sockaddr_rose srose;
1057         struct sk_buff *skb;
1058         unsigned char *asmptr;
1059         int n, size, qbit = 0;
1060
1061         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1062                 return -EINVAL;
1063
1064         if (sock_flag(sk, SOCK_ZAPPED))
1065                 return -EADDRNOTAVAIL;
1066
1067         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1068                 send_sig(SIGPIPE, current, 0);
1069                 return -EPIPE;
1070         }
1071
1072         if (rose->neighbour == NULL || rose->device == NULL)
1073                 return -ENETUNREACH;
1074
1075         if (usrose != NULL) {
1076                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1077                         return -EINVAL;
1078                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1079                 memcpy(&srose, usrose, msg->msg_namelen);
1080                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1081                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1082                         return -EISCONN;
1083                 if (srose.srose_ndigis != rose->dest_ndigis)
1084                         return -EISCONN;
1085                 if (srose.srose_ndigis == rose->dest_ndigis) {
1086                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1087                                 if (ax25cmp(&rose->dest_digis[n],
1088                                             &srose.srose_digis[n]))
1089                                         return -EISCONN;
1090                 }
1091                 if (srose.srose_family != AF_ROSE)
1092                         return -EINVAL;
1093         } else {
1094                 if (sk->sk_state != TCP_ESTABLISHED)
1095                         return -ENOTCONN;
1096
1097                 srose.srose_family = AF_ROSE;
1098                 srose.srose_addr   = rose->dest_addr;
1099                 srose.srose_call   = rose->dest_call;
1100                 srose.srose_ndigis = rose->dest_ndigis;
1101                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1102                         srose.srose_digis[n] = rose->dest_digis[n];
1103         }
1104
1105         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1106
1107         /* Build a packet */
1108         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1109         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1110
1111         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1112                 return err;
1113
1114         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1115
1116         /*
1117          *      Put the data on the end
1118          */
1119         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1120
1121         skb_reset_transport_header(skb);
1122         skb_put(skb, len);
1123
1124         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1125         if (err) {
1126                 kfree_skb(skb);
1127                 return err;
1128         }
1129
1130         /*
1131          *      If the Q BIT Include socket option is in force, the first
1132          *      byte of the user data is the logical value of the Q Bit.
1133          */
1134         if (rose->qbitincl) {
1135                 qbit = skb->data[0];
1136                 skb_pull(skb, 1);
1137         }
1138
1139         /*
1140          *      Push down the ROSE header
1141          */
1142         asmptr = skb_push(skb, ROSE_MIN_LEN);
1143
1144         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1145
1146         /* Build a ROSE Network header */
1147         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1148         asmptr[1] = (rose->lci >> 0) & 0xFF;
1149         asmptr[2] = ROSE_DATA;
1150
1151         if (qbit)
1152                 asmptr[0] |= ROSE_Q_BIT;
1153
1154         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1155
1156         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1157
1158         if (sk->sk_state != TCP_ESTABLISHED) {
1159                 kfree_skb(skb);
1160                 return -ENOTCONN;
1161         }
1162
1163 #ifdef M_BIT
1164 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1165         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1166                 unsigned char header[ROSE_MIN_LEN];
1167                 struct sk_buff *skbn;
1168                 int frontlen;
1169                 int lg;
1170
1171                 /* Save a copy of the Header */
1172                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1173                 skb_pull(skb, ROSE_MIN_LEN);
1174
1175                 frontlen = skb_headroom(skb);
1176
1177                 while (skb->len > 0) {
1178                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1179                                 kfree_skb(skb);
1180                                 return err;
1181                         }
1182
1183                         skbn->sk   = sk;
1184                         skbn->free = 1;
1185                         skbn->arp  = 1;
1186
1187                         skb_reserve(skbn, frontlen);
1188
1189                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1190
1191                         /* Copy the user data */
1192                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1193                         skb_pull(skb, lg);
1194
1195                         /* Duplicate the Header */
1196                         skb_push(skbn, ROSE_MIN_LEN);
1197                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1198
1199                         if (skb->len > 0)
1200                                 skbn->data[2] |= M_BIT;
1201
1202                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1203                 }
1204
1205                 skb->free = 1;
1206                 kfree_skb(skb);
1207         } else {
1208                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1209         }
1210 #else
1211         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1212 #endif
1213
1214         rose_kick(sk);
1215
1216         return len;
1217 }
1218
1219
1220 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1221                         struct msghdr *msg, size_t size, int flags)
1222 {
1223         struct sock *sk = sock->sk;
1224         struct rose_sock *rose = rose_sk(sk);
1225         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1226         size_t copied;
1227         unsigned char *asmptr;
1228         struct sk_buff *skb;
1229         int n, er, qbit;
1230
1231         /*
1232          * This works for seqpacket too. The receiver has ordered the queue for
1233          * us! We do one quick check first though
1234          */
1235         if (sk->sk_state != TCP_ESTABLISHED)
1236                 return -ENOTCONN;
1237
1238         /* Now we can treat all alike */
1239         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1240                 return er;
1241
1242         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1243
1244         skb_pull(skb, ROSE_MIN_LEN);
1245
1246         if (rose->qbitincl) {
1247                 asmptr  = skb_push(skb, 1);
1248                 *asmptr = qbit;
1249         }
1250
1251         skb_reset_transport_header(skb);
1252         copied     = skb->len;
1253
1254         if (copied > size) {
1255                 copied = size;
1256                 msg->msg_flags |= MSG_TRUNC;
1257         }
1258
1259         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1260
1261         if (srose != NULL) {
1262                 srose->srose_family = AF_ROSE;
1263                 srose->srose_addr   = rose->dest_addr;
1264                 srose->srose_call   = rose->dest_call;
1265                 srose->srose_ndigis = rose->dest_ndigis;
1266                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1267                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1268                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1269                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1270                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1271                 } else {
1272                         if (rose->dest_ndigis >= 1) {
1273                                 srose->srose_ndigis = 1;
1274                                 srose->srose_digi = rose->dest_digis[0];
1275                         }
1276                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1277                 }
1278         }
1279
1280         skb_free_datagram(sk, skb);
1281
1282         return copied;
1283 }
1284
1285
1286 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1287 {
1288         struct sock *sk = sock->sk;
1289         struct rose_sock *rose = rose_sk(sk);
1290         void __user *argp = (void __user *)arg;
1291
1292         switch (cmd) {
1293         case TIOCOUTQ: {
1294                 long amount;
1295                 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1296                 if (amount < 0)
1297                         amount = 0;
1298                 return put_user(amount, (unsigned int __user *) argp);
1299         }
1300
1301         case TIOCINQ: {
1302                 struct sk_buff *skb;
1303                 long amount = 0L;
1304                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1305                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1306                         amount = skb->len;
1307                 return put_user(amount, (unsigned int __user *) argp);
1308         }
1309
1310         case SIOCGSTAMP:
1311                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1312
1313         case SIOCGSTAMPNS:
1314                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1315
1316         case SIOCGIFADDR:
1317         case SIOCSIFADDR:
1318         case SIOCGIFDSTADDR:
1319         case SIOCSIFDSTADDR:
1320         case SIOCGIFBRDADDR:
1321         case SIOCSIFBRDADDR:
1322         case SIOCGIFNETMASK:
1323         case SIOCSIFNETMASK:
1324         case SIOCGIFMETRIC:
1325         case SIOCSIFMETRIC:
1326                 return -EINVAL;
1327
1328         case SIOCADDRT:
1329         case SIOCDELRT:
1330         case SIOCRSCLRRT:
1331                 if (!capable(CAP_NET_ADMIN))
1332                         return -EPERM;
1333                 return rose_rt_ioctl(cmd, argp);
1334
1335         case SIOCRSGCAUSE: {
1336                 struct rose_cause_struct rose_cause;
1337                 rose_cause.cause      = rose->cause;
1338                 rose_cause.diagnostic = rose->diagnostic;
1339                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1340         }
1341
1342         case SIOCRSSCAUSE: {
1343                 struct rose_cause_struct rose_cause;
1344                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1345                         return -EFAULT;
1346                 rose->cause      = rose_cause.cause;
1347                 rose->diagnostic = rose_cause.diagnostic;
1348                 return 0;
1349         }
1350
1351         case SIOCRSSL2CALL:
1352                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1353                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1354                         ax25_listen_release(&rose_callsign, NULL);
1355                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1356                         return -EFAULT;
1357                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1358                         return ax25_listen_register(&rose_callsign, NULL);
1359
1360                 return 0;
1361
1362         case SIOCRSGL2CALL:
1363                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1364
1365         case SIOCRSACCEPT:
1366                 if (rose->state == ROSE_STATE_5) {
1367                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1368                         rose_start_idletimer(sk);
1369                         rose->condition = 0x00;
1370                         rose->vs        = 0;
1371                         rose->va        = 0;
1372                         rose->vr        = 0;
1373                         rose->vl        = 0;
1374                         rose->state     = ROSE_STATE_3;
1375                 }
1376                 return 0;
1377
1378         default:
1379                 return -ENOIOCTLCMD;
1380         }
1381
1382         return 0;
1383 }
1384
1385 #ifdef CONFIG_PROC_FS
1386 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1387         __acquires(rose_list_lock)
1388 {
1389         int i;
1390         struct sock *s;
1391         struct hlist_node *node;
1392
1393         spin_lock_bh(&rose_list_lock);
1394         if (*pos == 0)
1395                 return SEQ_START_TOKEN;
1396
1397         i = 1;
1398         sk_for_each(s, node, &rose_list) {
1399                 if (i == *pos)
1400                         return s;
1401                 ++i;
1402         }
1403         return NULL;
1404 }
1405
1406 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1407 {
1408         ++*pos;
1409
1410         return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1411                 : sk_next((struct sock *)v);
1412 }
1413
1414 static void rose_info_stop(struct seq_file *seq, void *v)
1415         __releases(rose_list_lock)
1416 {
1417         spin_unlock_bh(&rose_list_lock);
1418 }
1419
1420 static int rose_info_show(struct seq_file *seq, void *v)
1421 {
1422         char buf[11];
1423
1424         if (v == SEQ_START_TOKEN)
1425                 seq_puts(seq,
1426                          "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");
1427
1428         else {
1429                 struct sock *s = v;
1430                 struct rose_sock *rose = rose_sk(s);
1431                 const char *devname, *callsign;
1432                 const struct net_device *dev = rose->device;
1433
1434                 if (!dev)
1435                         devname = "???";
1436                 else
1437                         devname = dev->name;
1438
1439                 seq_printf(seq, "%-10s %-9s ",
1440                         rose2asc(&rose->dest_addr),
1441                         ax2asc(buf, &rose->dest_call));
1442
1443                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1444                         callsign = "??????-?";
1445                 else
1446                         callsign = ax2asc(buf, &rose->source_call);
1447
1448                 seq_printf(seq,
1449                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1450                         rose2asc(&rose->source_addr),
1451                         callsign,
1452                         devname,
1453                         rose->lci & 0x0FFF,
1454                         (rose->neighbour) ? rose->neighbour->number : 0,
1455                         rose->state,
1456                         rose->vs,
1457                         rose->vr,
1458                         rose->va,
1459                         ax25_display_timer(&rose->timer) / HZ,
1460                         rose->t1 / HZ,
1461                         rose->t2 / HZ,
1462                         rose->t3 / HZ,
1463                         rose->hb / HZ,
1464                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1465                         rose->idle / (60 * HZ),
1466                         atomic_read(&s->sk_wmem_alloc),
1467                         atomic_read(&s->sk_rmem_alloc),
1468                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1469         }
1470
1471         return 0;
1472 }
1473
1474 static const struct seq_operations rose_info_seqops = {
1475         .start = rose_info_start,
1476         .next = rose_info_next,
1477         .stop = rose_info_stop,
1478         .show = rose_info_show,
1479 };
1480
1481 static int rose_info_open(struct inode *inode, struct file *file)
1482 {
1483         return seq_open(file, &rose_info_seqops);
1484 }
1485
1486 static const struct file_operations rose_info_fops = {
1487         .owner = THIS_MODULE,
1488         .open = rose_info_open,
1489         .read = seq_read,
1490         .llseek = seq_lseek,
1491         .release = seq_release,
1492 };
1493 #endif  /* CONFIG_PROC_FS */
1494
1495 static struct net_proto_family rose_family_ops = {
1496         .family         =       PF_ROSE,
1497         .create         =       rose_create,
1498         .owner          =       THIS_MODULE,
1499 };
1500
1501 static struct proto_ops rose_proto_ops = {
1502         .family         =       PF_ROSE,
1503         .owner          =       THIS_MODULE,
1504         .release        =       rose_release,
1505         .bind           =       rose_bind,
1506         .connect        =       rose_connect,
1507         .socketpair     =       sock_no_socketpair,
1508         .accept         =       rose_accept,
1509         .getname        =       rose_getname,
1510         .poll           =       datagram_poll,
1511         .ioctl          =       rose_ioctl,
1512         .listen         =       rose_listen,
1513         .shutdown       =       sock_no_shutdown,
1514         .setsockopt     =       rose_setsockopt,
1515         .getsockopt     =       rose_getsockopt,
1516         .sendmsg        =       rose_sendmsg,
1517         .recvmsg        =       rose_recvmsg,
1518         .mmap           =       sock_no_mmap,
1519         .sendpage       =       sock_no_sendpage,
1520 };
1521
1522 static struct notifier_block rose_dev_notifier = {
1523         .notifier_call  =       rose_device_event,
1524 };
1525
1526 static struct net_device **dev_rose;
1527
1528 static struct ax25_protocol rose_pid = {
1529         .pid    = AX25_P_ROSE,
1530         .func   = rose_route_frame
1531 };
1532
1533 static struct ax25_linkfail rose_linkfail_notifier = {
1534         .func   = rose_link_failed
1535 };
1536
1537 static int __init rose_proto_init(void)
1538 {
1539         int i;
1540         int rc;
1541
1542         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1543                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1544                 rc = -EINVAL;
1545                 goto out;
1546         }
1547
1548         rc = proto_register(&rose_proto, 0);
1549         if (rc != 0)
1550                 goto out;
1551
1552         rose_callsign = null_ax25_address;
1553
1554         dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1555         if (dev_rose == NULL) {
1556                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1557                 rc = -ENOMEM;
1558                 goto out_proto_unregister;
1559         }
1560
1561         for (i = 0; i < rose_ndevs; i++) {
1562                 struct net_device *dev;
1563                 char name[IFNAMSIZ];
1564
1565                 sprintf(name, "rose%d", i);
1566                 dev = alloc_netdev(sizeof(struct net_device_stats),
1567                                    name, rose_setup);
1568                 if (!dev) {
1569                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1570                         rc = -ENOMEM;
1571                         goto fail;
1572                 }
1573                 rc = register_netdev(dev);
1574                 if (rc) {
1575                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1576                         free_netdev(dev);
1577                         goto fail;
1578                 }
1579                 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
1580                 dev_rose[i] = dev;
1581         }
1582
1583         sock_register(&rose_family_ops);
1584         register_netdevice_notifier(&rose_dev_notifier);
1585
1586         ax25_register_pid(&rose_pid);
1587         ax25_linkfail_register(&rose_linkfail_notifier);
1588
1589 #ifdef CONFIG_SYSCTL
1590         rose_register_sysctl();
1591 #endif
1592         rose_loopback_init();
1593
1594         rose_add_loopback_neigh();
1595
1596         proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1597         proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1598         proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1599         proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1600 out:
1601         return rc;
1602 fail:
1603         while (--i >= 0) {
1604                 unregister_netdev(dev_rose[i]);
1605                 free_netdev(dev_rose[i]);
1606         }
1607         kfree(dev_rose);
1608 out_proto_unregister:
1609         proto_unregister(&rose_proto);
1610         goto out;
1611 }
1612 module_init(rose_proto_init);
1613
1614 module_param(rose_ndevs, int, 0);
1615 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1616
1617 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1618 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1619 MODULE_LICENSE("GPL");
1620 MODULE_ALIAS_NETPROTO(PF_ROSE);
1621
1622 static void __exit rose_exit(void)
1623 {
1624         int i;
1625
1626         proc_net_remove(&init_net, "rose");
1627         proc_net_remove(&init_net, "rose_neigh");
1628         proc_net_remove(&init_net, "rose_nodes");
1629         proc_net_remove(&init_net, "rose_routes");
1630         rose_loopback_clear();
1631
1632         rose_rt_free();
1633
1634         ax25_protocol_release(AX25_P_ROSE);
1635         ax25_linkfail_release(&rose_linkfail_notifier);
1636
1637         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1638                 ax25_listen_release(&rose_callsign, NULL);
1639
1640 #ifdef CONFIG_SYSCTL
1641         rose_unregister_sysctl();
1642 #endif
1643         unregister_netdevice_notifier(&rose_dev_notifier);
1644
1645         sock_unregister(PF_ROSE);
1646
1647         for (i = 0; i < rose_ndevs; i++) {
1648                 struct net_device *dev = dev_rose[i];
1649
1650                 if (dev) {
1651                         unregister_netdev(dev);
1652                         free_netdev(dev);
1653                 }
1654         }
1655
1656         kfree(dev_rose);
1657         proto_unregister(&rose_proto);
1658 }
1659
1660 module_exit(rose_exit);