net/rose/af_rose.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License as published by
   4  * the Free Software Foundation; either version 2 of the License, or
   5  * (at your option) any later version.
   6  *
   7  * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
   8  * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
   9  * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
  10  * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
  11  */
  12
  13 #include <linux/capability.h>
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/init.h>
  17 #include <linux/errno.h>
  18 #include <linux/types.h>
  19 #include <linux/socket.h>
  20 #include <linux/in.h>
  21 #include <linux/kernel.h>
  22 #include <linux/sched.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/timer.h>
  25 #include <linux/string.h>
  26 #include <linux/sockios.h>
  27 #include <linux/net.h>
  28 #include <linux/stat.h>
  29 #include <net/net_namespace.h>
  30 #include <net/ax25.h>
  31 #include <linux/inet.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/if_arp.h>
  34 #include <linux/skbuff.h>
  35 #include <net/sock.h>
  36 #include <asm/system.h>
  37 #include <asm/uaccess.h>
  38 #include <linux/fcntl.h>
  39 #include <linux/termios.h>
  40 #include <linux/mm.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/notifier.h>
  43 #include <net/rose.h>
  44 #include <linux/proc_fs.h>
  45 #include <linux/seq_file.h>
  46 #include <net/tcp_states.h>
  47 #include <net/ip.h>
  48 #include <net/arp.h>
  49
  50 static int rose_ndevs = 10;
  51
  52 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
  53 int sysctl_rose_call_request_timeout    = ROSE_DEFAULT_T1;
  54 int sysctl_rose_reset_request_timeout   = ROSE_DEFAULT_T2;
  55 int sysctl_rose_clear_request_timeout   = ROSE_DEFAULT_T3;
  56 int sysctl_rose_no_activity_timeout     = ROSE_DEFAULT_IDLE;
  57 int sysctl_rose_ack_hold_back_timeout   = ROSE_DEFAULT_HB;
  58 int sysctl_rose_routing_control         = ROSE_DEFAULT_ROUTING;
  59 int sysctl_rose_link_fail_timeout       = ROSE_DEFAULT_FAIL_TIMEOUT;
  60 int sysctl_rose_maximum_vcs             = ROSE_DEFAULT_MAXVC;
  61 int sysctl_rose_window_size             = ROSE_DEFAULT_WINDOW_SIZE;
  62
  63 static HLIST_HEAD(rose_list);
  64 static DEFINE_SPINLOCK(rose_list_lock);
  65
  66 static struct proto_ops rose_proto_ops;
  67
  68 ax25_address rose_callsign;
  69
  70 /*
  71  * ROSE network devices are virtual network devices encapsulating ROSE
  72  * frames into AX.25 which will be sent through an AX.25 device, so form a
  73  * special "super class" of normal net devices; split their locks off into a
  74  * separate class since they always nest.
  75  */
  76 static struct lock_class_key rose_netdev_xmit_lock_key;
  77
  78 /*
  79  *      Convert a ROSE address into text.
  80  */
  81 const char *rose2asc(const rose_address *addr)
  82 {
  83         static char buffer[11];
  84
  85         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
  86             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
  87             addr->rose_addr[4] == 0x00) {
  88                 strcpy(buffer, "*");
  89         } else {
  90                 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
  91                                                 addr->rose_addr[1] & 0xFF,
  92                                                 addr->rose_addr[2] & 0xFF,
  93                                                 addr->rose_addr[3] & 0xFF,
  94                                                 addr->rose_addr[4] & 0xFF);
  95         }
  96
  97         return buffer;
  98 }
  99
 100 /*
 101  *      Compare two ROSE addresses, 0 == equal.
 102  */
 103 int rosecmp(rose_address *addr1, rose_address *addr2)
 104 {
 105         int i;
 106
 107         for (i = 0; i < 5; i++)
 108                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
 109                         return 1;
 110
 111         return 0;
 112 }
 113
 114 /*
 115  *      Compare two ROSE addresses for only mask digits, 0 == equal.
 116  */
 117 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 118 {
 119         int i, j;
 120
 121         if (mask > 10)
 122                 return 1;
 123
 124         for (i = 0; i < mask; i++) {
 125                 j = i / 2;
 126
 127                 if ((i % 2) != 0) {
 128                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
 129                                 return 1;
 130                 } else {
 131                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
 132                                 return 1;
 133                 }
 134         }
 135
 136         return 0;
 137 }
 138
 139 /*
 140  *      Socket removal during an interrupt is now safe.
 141  */
 142 static void rose_remove_socket(struct sock *sk)
 143 {
 144         spin_lock_bh(&rose_list_lock);
 145         sk_del_node_init(sk);
 146         spin_unlock_bh(&rose_list_lock);
 147 }
 148
 149 /*
 150  *      Kill all bound sockets on a broken link layer connection to a
 151  *      particular neighbour.
 152  */
 153 void rose_kill_by_neigh(struct rose_neigh *neigh)
 154 {
 155         struct sock *s;
 156         struct hlist_node *node;
 157
 158         spin_lock_bh(&rose_list_lock);
 159         sk_for_each(s, node, &rose_list) {
 160                 struct rose_sock *rose = rose_sk(s);
 161
 162                 if (rose->neighbour == neigh) {
 163                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 164                         rose->neighbour->use--;
 165                         rose->neighbour = NULL;
 166                 }
 167         }
 168         spin_unlock_bh(&rose_list_lock);
 169 }
 170
 171 /*
 172  *      Kill all bound sockets on a dropped device.
 173  */
 174 static void rose_kill_by_device(struct net_device *dev)
 175 {
 176         struct sock *s;
 177         struct hlist_node *node;
 178
 179         spin_lock_bh(&rose_list_lock);
 180         sk_for_each(s, node, &rose_list) {
 181                 struct rose_sock *rose = rose_sk(s);
 182
 183                 if (rose->device == dev) {
 184                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 185                         rose->neighbour->use--;
 186                         rose->device = NULL;
 187                 }
 188         }
 189         spin_unlock_bh(&rose_list_lock);
 190 }
 191
 192 /*
 193  *      Handle device status changes.
 194  */
 195 static int rose_device_event(struct notifier_block *this, unsigned long event,
 196         void *ptr)
 197 {
 198         struct net_device *dev = (struct net_device *)ptr;
 199
 200         if (dev->nd_net != &init_net)
 201                 return NOTIFY_DONE;
 202
 203         if (event != NETDEV_DOWN)
 204                 return NOTIFY_DONE;
 205
 206         switch (dev->type) {
 207         case ARPHRD_ROSE:
 208                 rose_kill_by_device(dev);
 209                 break;
 210         case ARPHRD_AX25:
 211                 rose_link_device_down(dev);
 212                 rose_rt_device_down(dev);
 213                 break;
 214         }
 215
 216         return NOTIFY_DONE;
 217 }
 218
 219 /*
 220  *      Add a socket to the bound sockets list.
 221  */
 222 static void rose_insert_socket(struct sock *sk)
 223 {
 224
 225         spin_lock_bh(&rose_list_lock);
 226         sk_add_node(sk, &rose_list);
 227         spin_unlock_bh(&rose_list_lock);
 228 }
 229
 230 /*
 231  *      Find a socket that wants to accept the Call Request we just
 232  *      received.
 233  */
 234 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 235 {
 236         struct sock *s;
 237         struct hlist_node *node;
 238
 239         spin_lock_bh(&rose_list_lock);
 240         sk_for_each(s, node, &rose_list) {
 241                 struct rose_sock *rose = rose_sk(s);
 242
 243                 if (!rosecmp(&rose->source_addr, addr) &&
 244                     !ax25cmp(&rose->source_call, call) &&
 245                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 246                         goto found;
 247         }
 248
 249         sk_for_each(s, node, &rose_list) {
 250                 struct rose_sock *rose = rose_sk(s);
 251
 252                 if (!rosecmp(&rose->source_addr, addr) &&
 253                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 254                     s->sk_state == TCP_LISTEN)
 255                         goto found;
 256         }
 257         s = NULL;
 258 found:
 259         spin_unlock_bh(&rose_list_lock);
 260         return s;
 261 }
 262
 263 /*
 264  *      Find a connected ROSE socket given my LCI and device.
 265  */
 266 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 267 {
 268         struct sock *s;
 269         struct hlist_node *node;
 270
 271         spin_lock_bh(&rose_list_lock);
 272         sk_for_each(s, node, &rose_list) {
 273                 struct rose_sock *rose = rose_sk(s);
 274
 275                 if (rose->lci == lci && rose->neighbour == neigh)
 276                         goto found;
 277         }
 278         s = NULL;
 279 found:
 280         spin_unlock_bh(&rose_list_lock);
 281         return s;
 282 }
 283
 284 /*
 285  *      Find a unique LCI for a given device.
 286  */
 287 unsigned int rose_new_lci(struct rose_neigh *neigh)
 288 {
 289         int lci;
 290
 291         if (neigh->dce_mode) {
 292                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 293                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 294                                 return lci;
 295         } else {
 296                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 297                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 298                                 return lci;
 299         }
 300
 301         return 0;
 302 }
 303
 304 /*
 305  *      Deferred destroy.
 306  */
 307 void rose_destroy_socket(struct sock *);
 308
 309 /*
 310  *      Handler for deferred kills.
 311  */
 312 static void rose_destroy_timer(unsigned long data)
 313 {
 314         rose_destroy_socket((struct sock *)data);
 315 }
 316
 317 /*
 318  *      This is called from user mode and the timers. Thus it protects itself
 319  *      against interrupt users but doesn't worry about being called during
 320  *      work.  Once it is removed from the queue no interrupt or bottom half
 321  *      will touch it and we are (fairly 8-) ) safe.
 322  */
 323 void rose_destroy_socket(struct sock *sk)
 324 {
 325         struct sk_buff *skb;
 326
 327         rose_remove_socket(sk);
 328         rose_stop_heartbeat(sk);
 329         rose_stop_idletimer(sk);
 330         rose_stop_timer(sk);
 331
 332         rose_clear_queues(sk);          /* Flush the queues */
 333
 334         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 335                 if (skb->sk != sk) {    /* A pending connection */
 336                         /* Queue the unaccepted socket for death */
 337                         sock_set_flag(skb->sk, SOCK_DEAD);
 338                         rose_start_heartbeat(skb->sk);
 339                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 340                 }
 341
 342                 kfree_skb(skb);
 343         }
 344
 345         if (atomic_read(&sk->sk_wmem_alloc) ||
 346             atomic_read(&sk->sk_rmem_alloc)) {
 347                 /* Defer: outstanding buffers */
 348                 init_timer(&sk->sk_timer);
 349                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 350                 sk->sk_timer.function = rose_destroy_timer;
 351                 sk->sk_timer.data     = (unsigned long)sk;
 352                 add_timer(&sk->sk_timer);
 353         } else
 354                 sock_put(sk);
 355 }
 356
 357 /*
 358  *      Handling for system calls applied via the various interfaces to a
 359  *      ROSE socket object.
 360  */
 361
 362 static int rose_setsockopt(struct socket *sock, int level, int optname,
 363         char __user *optval, int optlen)
 364 {
 365         struct sock *sk = sock->sk;
 366         struct rose_sock *rose = rose_sk(sk);
 367         int opt;
 368
 369         if (level != SOL_ROSE)
 370                 return -ENOPROTOOPT;
 371
 372         if (optlen < sizeof(int))
 373                 return -EINVAL;
 374
 375         if (get_user(opt, (int __user *)optval))
 376                 return -EFAULT;
 377
 378         switch (optname) {
 379         case ROSE_DEFER:
 380                 rose->defer = opt ? 1 : 0;
 381                 return 0;
 382
 383         case ROSE_T1:
 384                 if (opt < 1)
 385                         return -EINVAL;
 386                 rose->t1 = opt * HZ;
 387                 return 0;
 388
 389         case ROSE_T2:
 390                 if (opt < 1)
 391                         return -EINVAL;
 392                 rose->t2 = opt * HZ;
 393                 return 0;
 394
 395         case ROSE_T3:
 396                 if (opt < 1)
 397                         return -EINVAL;
 398                 rose->t3 = opt * HZ;
 399                 return 0;
 400
 401         case ROSE_HOLDBACK:
 402                 if (opt < 1)
 403                         return -EINVAL;
 404                 rose->hb = opt * HZ;
 405                 return 0;
 406
 407         case ROSE_IDLE:
 408                 if (opt < 0)
 409                         return -EINVAL;
 410                 rose->idle = opt * 60 * HZ;
 411                 return 0;
 412
 413         case ROSE_QBITINCL:
 414                 rose->qbitincl = opt ? 1 : 0;
 415                 return 0;
 416
 417         default:
 418                 return -ENOPROTOOPT;
 419         }
 420 }
 421
 422 static int rose_getsockopt(struct socket *sock, int level, int optname,
 423         char __user *optval, int __user *optlen)
 424 {
 425         struct sock *sk = sock->sk;
 426         struct rose_sock *rose = rose_sk(sk);
 427         int val = 0;
 428         int len;
 429
 430         if (level != SOL_ROSE)
 431                 return -ENOPROTOOPT;
 432
 433         if (get_user(len, optlen))
 434                 return -EFAULT;
 435
 436         if (len < 0)
 437                 return -EINVAL;
 438
 439         switch (optname) {
 440         case ROSE_DEFER:
 441                 val = rose->defer;
 442                 break;
 443
 444         case ROSE_T1:
 445                 val = rose->t1 / HZ;
 446                 break;
 447
 448         case ROSE_T2:
 449                 val = rose->t2 / HZ;
 450                 break;
 451
 452         case ROSE_T3:
 453                 val = rose->t3 / HZ;
 454                 break;
 455
 456         case ROSE_HOLDBACK:
 457                 val = rose->hb / HZ;
 458                 break;
 459
 460         case ROSE_IDLE:
 461                 val = rose->idle / (60 * HZ);
 462                 break;
 463
 464         case ROSE_QBITINCL:
 465                 val = rose->qbitincl;
 466                 break;
 467
 468         default:
 469                 return -ENOPROTOOPT;
 470         }
 471
 472         len = min_t(unsigned int, len, sizeof(int));
 473
 474         if (put_user(len, optlen))
 475                 return -EFAULT;
 476
 477         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 478 }
 479
 480 static int rose_listen(struct socket *sock, int backlog)
 481 {
 482         struct sock *sk = sock->sk;
 483
 484         if (sk->sk_state != TCP_LISTEN) {
 485                 struct rose_sock *rose = rose_sk(sk);
 486
 487                 rose->dest_ndigis = 0;
 488                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 489                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 490                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 491                 sk->sk_max_ack_backlog = backlog;
 492                 sk->sk_state           = TCP_LISTEN;
 493                 return 0;
 494         }
 495
 496         return -EOPNOTSUPP;
 497 }
 498
 499 static struct proto rose_proto = {
 500         .name     = "ROSE",
 501         .owner    = THIS_MODULE,
 502         .obj_size = sizeof(struct rose_sock),
 503 };
 504
 505 static int rose_create(struct net *net, struct socket *sock, int protocol)
 506 {
 507         struct sock *sk;
 508         struct rose_sock *rose;
 509
 510         if (net != &init_net)
 511                 return -EAFNOSUPPORT;
 512
 513         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 514                 return -ESOCKTNOSUPPORT;
 515
 516         sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
 517         if (sk == NULL)
 518                 return -ENOMEM;
 519
 520         rose = rose_sk(sk);
 521
 522         sock_init_data(sock, sk);
 523
 524         skb_queue_head_init(&rose->ack_queue);
 525 #ifdef M_BIT
 526         skb_queue_head_init(&rose->frag_queue);
 527         rose->fraglen    = 0;
 528 #endif
 529
 530         sock->ops    = &rose_proto_ops;
 531         sk->sk_protocol = protocol;
 532
 533         init_timer(&rose->timer);
 534         init_timer(&rose->idletimer);
 535
 536         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 537         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 538         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 539         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 540         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 541
 542         rose->state = ROSE_STATE_0;
 543
 544         return 0;
 545 }
 546
 547 static struct sock *rose_make_new(struct sock *osk)
 548 {
 549         struct sock *sk;
 550         struct rose_sock *rose, *orose;
 551
 552         if (osk->sk_type != SOCK_SEQPACKET)
 553                 return NULL;
 554
 555         sk = sk_alloc(osk->sk_net, PF_ROSE, GFP_ATOMIC, &rose_proto);
 556         if (sk == NULL)
 557                 return NULL;
 558
 559         rose = rose_sk(sk);
 560
 561         sock_init_data(NULL, sk);
 562
 563         skb_queue_head_init(&rose->ack_queue);
 564 #ifdef M_BIT
 565         skb_queue_head_init(&rose->frag_queue);
 566         rose->fraglen  = 0;
 567 #endif
 568
 569         sk->sk_type     = osk->sk_type;
 570         sk->sk_socket   = osk->sk_socket;
 571         sk->sk_priority = osk->sk_priority;
 572         sk->sk_protocol = osk->sk_protocol;
 573         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 574         sk->sk_sndbuf   = osk->sk_sndbuf;
 575         sk->sk_state    = TCP_ESTABLISHED;
 576         sk->sk_sleep    = osk->sk_sleep;
 577         sock_copy_flags(sk, osk);
 578
 579         init_timer(&rose->timer);
 580         init_timer(&rose->idletimer);
 581
 582         orose           = rose_sk(osk);
 583         rose->t1        = orose->t1;
 584         rose->t2        = orose->t2;
 585         rose->t3        = orose->t3;
 586         rose->hb        = orose->hb;
 587         rose->idle      = orose->idle;
 588         rose->defer     = orose->defer;
 589         rose->device    = orose->device;
 590         rose->qbitincl  = orose->qbitincl;
 591
 592         return sk;
 593 }
 594
 595 static int rose_release(struct socket *sock)
 596 {
 597         struct sock *sk = sock->sk;
 598         struct rose_sock *rose;
 599
 600         if (sk == NULL) return 0;
 601
 602         rose = rose_sk(sk);
 603
 604         switch (rose->state) {
 605         case ROSE_STATE_0:
 606                 rose_disconnect(sk, 0, -1, -1);
 607                 rose_destroy_socket(sk);
 608                 break;
 609
 610         case ROSE_STATE_2:
 611                 rose->neighbour->use--;
 612                 rose_disconnect(sk, 0, -1, -1);
 613                 rose_destroy_socket(sk);
 614                 break;
 615
 616         case ROSE_STATE_1:
 617         case ROSE_STATE_3:
 618         case ROSE_STATE_4:
 619         case ROSE_STATE_5:
 620                 rose_clear_queues(sk);
 621                 rose_stop_idletimer(sk);
 622                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 623                 rose_start_t3timer(sk);
 624                 rose->state  = ROSE_STATE_2;
 625                 sk->sk_state    = TCP_CLOSE;
 626                 sk->sk_shutdown |= SEND_SHUTDOWN;
 627                 sk->sk_state_change(sk);
 628                 sock_set_flag(sk, SOCK_DEAD);
 629                 sock_set_flag(sk, SOCK_DESTROY);
 630                 break;
 631
 632         default:
 633                 break;
 634         }
 635
 636         sock->sk = NULL;
 637
 638         return 0;
 639 }
 640
 641 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 642 {
 643         struct sock *sk = sock->sk;
 644         struct rose_sock *rose = rose_sk(sk);
 645         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 646         struct net_device *dev;
 647         ax25_address *source;
 648         ax25_uid_assoc *user;
 649         int n;
 650
 651         if (!sock_flag(sk, SOCK_ZAPPED))
 652                 return -EINVAL;
 653
 654         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 655                 return -EINVAL;
 656
 657         if (addr->srose_family != AF_ROSE)
 658                 return -EINVAL;
 659
 660         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 661                 return -EINVAL;
 662
 663         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 664                 return -EINVAL;
 665
 666         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
 667                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
 668                 return -EADDRNOTAVAIL;
 669         }
 670
 671         source = &addr->srose_call;
 672
 673         user = ax25_findbyuid(current->euid);
 674         if (user) {
 675                 rose->source_call = user->call;
 676                 ax25_uid_put(user);
 677         } else {
 678                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 679                         return -EACCES;
 680                 rose->source_call   = *source;
 681         }
 682
 683         rose->source_addr   = addr->srose_addr;
 684         rose->device        = dev;
 685         rose->source_ndigis = addr->srose_ndigis;
 686
 687         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 688                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 689                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 690                         rose->source_digis[n] = full_addr->srose_digis[n];
 691         } else {
 692                 if (rose->source_ndigis == 1) {
 693                         rose->source_digis[0] = addr->srose_digi;
 694                 }
 695         }
 696
 697         rose_insert_socket(sk);
 698
 699         sock_reset_flag(sk, SOCK_ZAPPED);
 700         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
 701         return 0;
 702 }
 703
 704 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 705 {
 706         struct sock *sk = sock->sk;
 707         struct rose_sock *rose = rose_sk(sk);
 708         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 709         unsigned char cause, diagnostic;
 710         struct net_device *dev;
 711         ax25_uid_assoc *user;
 712         int n, err = 0;
 713
 714         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 715                 return -EINVAL;
 716
 717         if (addr->srose_family != AF_ROSE)
 718                 return -EINVAL;
 719
 720         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 721                 return -EINVAL;
 722
 723         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 724                 return -EINVAL;
 725
 726         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 727         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 728                 return -EINVAL;
 729
 730         lock_sock(sk);
 731
 732         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 733                 /* Connect completed during a ERESTARTSYS event */
 734                 sock->state = SS_CONNECTED;
 735                 goto out_release;
 736         }
 737
 738         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 739                 sock->state = SS_UNCONNECTED;
 740                 err = -ECONNREFUSED;
 741                 goto out_release;
 742         }
 743
 744         if (sk->sk_state == TCP_ESTABLISHED) {
 745                 /* No reconnect on a seqpacket socket */
 746                 err = -EISCONN;
 747                 goto out_release;
 748         }
 749
 750         sk->sk_state   = TCP_CLOSE;
 751         sock->state = SS_UNCONNECTED;
 752
 753         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 754                                          &diagnostic);
 755         if (!rose->neighbour)
 756                 return -ENETUNREACH;
 757
 758         rose->lci = rose_new_lci(rose->neighbour);
 759         if (!rose->lci) {
 760                 err = -ENETUNREACH;
 761                 goto out_release;
 762         }
 763
 764         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 765                 sock_reset_flag(sk, SOCK_ZAPPED);
 766
 767                 if ((dev = rose_dev_first()) == NULL) {
 768                         err = -ENETUNREACH;
 769                         goto out_release;
 770                 }
 771
 772                 user = ax25_findbyuid(current->euid);
 773                 if (!user) {
 774                         err = -EINVAL;
 775                         goto out_release;
 776                 }
 777
 778                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 779                 rose->source_call = user->call;
 780                 rose->device      = dev;
 781                 ax25_uid_put(user);
 782
 783                 rose_insert_socket(sk);         /* Finish the bind */
 784         }
 785 rose_try_next_neigh:
 786         rose->dest_addr   = addr->srose_addr;
 787         rose->dest_call   = addr->srose_call;
 788         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 789         rose->dest_ndigis = addr->srose_ndigis;
 790
 791         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 792                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 793                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 794                         rose->dest_digis[n] = full_addr->srose_digis[n];
 795         } else {
 796                 if (rose->dest_ndigis == 1) {
 797                         rose->dest_digis[0] = addr->srose_digi;
 798                 }
 799         }
 800
 801         /* Move to connecting socket, start sending Connect Requests */
 802         sock->state   = SS_CONNECTING;
 803         sk->sk_state     = TCP_SYN_SENT;
 804
 805         rose->state = ROSE_STATE_1;
 806
 807         rose->neighbour->use++;
 808
 809         rose_write_internal(sk, ROSE_CALL_REQUEST);
 810         rose_start_heartbeat(sk);
 811         rose_start_t1timer(sk);
 812
 813         /* Now the loop */
 814         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
 815                 err = -EINPROGRESS;
 816                 goto out_release;
 817         }
 818
 819         /*
 820          * A Connect Ack with Choke or timeout or failed routing will go to
 821          * closed.
 822          */
 823         if (sk->sk_state == TCP_SYN_SENT) {
 824                 DEFINE_WAIT(wait);
 825
 826                 for (;;) {
 827                         prepare_to_wait(sk->sk_sleep, &wait,
 828                                         TASK_INTERRUPTIBLE);
 829                         if (sk->sk_state != TCP_SYN_SENT)
 830                                 break;
 831                         if (!signal_pending(current)) {
 832                                 release_sock(sk);
 833                                 schedule();
 834                                 lock_sock(sk);
 835                                 continue;
 836                         }
 837                         err = -ERESTARTSYS;
 838                         break;
 839                 }
 840                 finish_wait(sk->sk_sleep, &wait);
 841
 842                 if (err)
 843                         goto out_release;
 844         }
 845
 846         if (sk->sk_state != TCP_ESTABLISHED) {
 847         /* Try next neighbour */
 848                 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic);
 849                 if (rose->neighbour)
 850                         goto rose_try_next_neigh;
 851
 852                 /* No more neighbours */
 853                 sock->state = SS_UNCONNECTED;
 854                 err = sock_error(sk);   /* Always set at this point */
 855                 goto out_release;
 856         }
 857
 858         sock->state = SS_CONNECTED;
 859
 860 out_release:
 861         release_sock(sk);
 862
 863         return err;
 864 }
 865
 866 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 867 {
 868         struct sk_buff *skb;
 869         struct sock *newsk;
 870         DEFINE_WAIT(wait);
 871         struct sock *sk;
 872         int err = 0;
 873
 874         if ((sk = sock->sk) == NULL)
 875                 return -EINVAL;
 876
 877         lock_sock(sk);
 878         if (sk->sk_type != SOCK_SEQPACKET) {
 879                 err = -EOPNOTSUPP;
 880                 goto out_release;
 881         }
 882
 883         if (sk->sk_state != TCP_LISTEN) {
 884                 err = -EINVAL;
 885                 goto out_release;
 886         }
 887
 888         /*
 889          *      The write queue this time is holding sockets ready to use
 890          *      hooked into the SABM we saved
 891          */
 892         for (;;) {
 893                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 894
 895                 skb = skb_dequeue(&sk->sk_receive_queue);
 896                 if (skb)
 897                         break;
 898
 899                 if (flags & O_NONBLOCK) {
 900                         err = -EWOULDBLOCK;
 901                         break;
 902                 }
 903                 if (!signal_pending(current)) {
 904                         release_sock(sk);
 905                         schedule();
 906                         lock_sock(sk);
 907                         continue;
 908                 }
 909                 err = -ERESTARTSYS;
 910                 break;
 911         }
 912         finish_wait(sk->sk_sleep, &wait);
 913         if (err)
 914                 goto out_release;
 915
 916         newsk = skb->sk;
 917         newsk->sk_socket = newsock;
 918         newsk->sk_sleep = &newsock->wait;
 919
 920         /* Now attach up the new socket */
 921         skb->sk = NULL;
 922         kfree_skb(skb);
 923         sk->sk_ack_backlog--;
 924         newsock->sk = newsk;
 925
 926 out_release:
 927         release_sock(sk);
 928
 929         return err;
 930 }
 931
 932 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 933         int *uaddr_len, int peer)
 934 {
 935         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 936         struct sock *sk = sock->sk;
 937         struct rose_sock *rose = rose_sk(sk);
 938         int n;
 939
 940         if (peer != 0) {
 941                 if (sk->sk_state != TCP_ESTABLISHED)
 942                         return -ENOTCONN;
 943                 srose->srose_family = AF_ROSE;
 944                 srose->srose_addr   = rose->dest_addr;
 945                 srose->srose_call   = rose->dest_call;
 946                 srose->srose_ndigis = rose->dest_ndigis;
 947                 for (n = 0; n < rose->dest_ndigis; n++)
 948                         srose->srose_digis[n] = rose->dest_digis[n];
 949         } else {
 950                 srose->srose_family = AF_ROSE;
 951                 srose->srose_addr   = rose->source_addr;
 952                 srose->srose_call   = rose->source_call;
 953                 srose->srose_ndigis = rose->source_ndigis;
 954                 for (n = 0; n < rose->source_ndigis; n++)
 955                         srose->srose_digis[n] = rose->source_digis[n];
 956         }
 957
 958         *uaddr_len = sizeof(struct full_sockaddr_rose);
 959         return 0;
 960 }
 961
 962 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 963 {
 964         struct sock *sk;
 965         struct sock *make;
 966         struct rose_sock *make_rose;
 967         struct rose_facilities_struct facilities;
 968         int n, len;
 969
 970         skb->sk = NULL;         /* Initially we don't know who it's for */
 971
 972         /*
 973          *      skb->data points to the rose frame start
 974          */
 975         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 976
 977         len  = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
 978         len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
 979         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
 980                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 981                 return 0;
 982         }
 983
 984         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
 985
 986         /*
 987          * We can't accept the Call Request.
 988          */
 989         if (sk == NULL || sk_acceptq_is_full(sk) ||
 990             (make = rose_make_new(sk)) == NULL) {
 991                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
 992                 return 0;
 993         }
 994
 995         skb->sk     = make;
 996         make->sk_state = TCP_ESTABLISHED;
 997         make_rose = rose_sk(make);
 998
 999         make_rose->lci           = lci;
1000         make_rose->dest_addr     = facilities.dest_addr;
1001         make_rose->dest_call     = facilities.dest_call;
1002         make_rose->dest_ndigis   = facilities.dest_ndigis;
1003         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1004                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1005         make_rose->source_addr   = facilities.source_addr;
1006         make_rose->source_call   = facilities.source_call;
1007         make_rose->source_ndigis = facilities.source_ndigis;
1008         for (n = 0 ; n < facilities.source_ndigis ; n++)
1009                 make_rose->source_digis[n]= facilities.source_digis[n];
1010         make_rose->neighbour     = neigh;
1011         make_rose->device        = dev;
1012         make_rose->facilities    = facilities;
1013
1014         make_rose->neighbour->use++;
1015
1016         if (rose_sk(sk)->defer) {
1017                 make_rose->state = ROSE_STATE_5;
1018         } else {
1019                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1020                 make_rose->state = ROSE_STATE_3;
1021                 rose_start_idletimer(make);
1022         }
1023
1024         make_rose->condition = 0x00;
1025         make_rose->vs        = 0;
1026         make_rose->va        = 0;
1027         make_rose->vr        = 0;
1028         make_rose->vl        = 0;
1029         sk->sk_ack_backlog++;
1030
1031         rose_insert_socket(make);
1032
1033         skb_queue_head(&sk->sk_receive_queue, skb);
1034
1035         rose_start_heartbeat(make);
1036
1037         if (!sock_flag(sk, SOCK_DEAD))
1038                 sk->sk_data_ready(sk, skb->len);
1039
1040         return 1;
1041 }
1042
1043 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1044                         struct msghdr *msg, size_t len)
1045 {
1046         struct sock *sk = sock->sk;
1047         struct rose_sock *rose = rose_sk(sk);
1048         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1049         int err;
1050         struct full_sockaddr_rose srose;
1051         struct sk_buff *skb;
1052         unsigned char *asmptr;
1053         int n, size, qbit = 0;
1054
1055         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1056                 return -EINVAL;
1057
1058         if (sock_flag(sk, SOCK_ZAPPED))
1059                 return -EADDRNOTAVAIL;
1060
1061         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1062                 send_sig(SIGPIPE, current, 0);
1063                 return -EPIPE;
1064         }
1065
1066         if (rose->neighbour == NULL || rose->device == NULL)
1067                 return -ENETUNREACH;
1068
1069         if (usrose != NULL) {
1070                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1071                         return -EINVAL;
1072                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1073                 memcpy(&srose, usrose, msg->msg_namelen);
1074                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1075                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1076                         return -EISCONN;
1077                 if (srose.srose_ndigis != rose->dest_ndigis)
1078                         return -EISCONN;
1079                 if (srose.srose_ndigis == rose->dest_ndigis) {
1080                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1081                                 if (ax25cmp(&rose->dest_digis[n],
1082                                             &srose.srose_digis[n]))
1083                                         return -EISCONN;
1084                 }
1085                 if (srose.srose_family != AF_ROSE)
1086                         return -EINVAL;
1087         } else {
1088                 if (sk->sk_state != TCP_ESTABLISHED)
1089                         return -ENOTCONN;
1090
1091                 srose.srose_family = AF_ROSE;
1092                 srose.srose_addr   = rose->dest_addr;
1093                 srose.srose_call   = rose->dest_call;
1094                 srose.srose_ndigis = rose->dest_ndigis;
1095                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1096                         srose.srose_digis[n] = rose->dest_digis[n];
1097         }
1098
1099         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1100
1101         /* Build a packet */
1102         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1103         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1104
1105         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1106                 return err;
1107
1108         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1109
1110         /*
1111          *      Put the data on the end
1112          */
1113         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1114
1115         skb_reset_transport_header(skb);
1116         skb_put(skb, len);
1117
1118         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1119         if (err) {
1120                 kfree_skb(skb);
1121                 return err;
1122         }
1123
1124         /*
1125          *      If the Q BIT Include socket option is in force, the first
1126          *      byte of the user data is the logical value of the Q Bit.
1127          */
1128         if (rose->qbitincl) {
1129                 qbit = skb->data[0];
1130                 skb_pull(skb, 1);
1131         }
1132
1133         /*
1134          *      Push down the ROSE header
1135          */
1136         asmptr = skb_push(skb, ROSE_MIN_LEN);
1137
1138         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1139
1140         /* Build a ROSE Network header */
1141         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1142         asmptr[1] = (rose->lci >> 0) & 0xFF;
1143         asmptr[2] = ROSE_DATA;
1144
1145         if (qbit)
1146                 asmptr[0] |= ROSE_Q_BIT;
1147
1148         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1149
1150         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1151
1152         if (sk->sk_state != TCP_ESTABLISHED) {
1153                 kfree_skb(skb);
1154                 return -ENOTCONN;
1155         }
1156
1157 #ifdef M_BIT
1158 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1159         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1160                 unsigned char header[ROSE_MIN_LEN];
1161                 struct sk_buff *skbn;
1162                 int frontlen;
1163                 int lg;
1164
1165                 /* Save a copy of the Header */
1166                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1167                 skb_pull(skb, ROSE_MIN_LEN);
1168
1169                 frontlen = skb_headroom(skb);
1170
1171                 while (skb->len > 0) {
1172                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1173                                 kfree_skb(skb);
1174                                 return err;
1175                         }
1176
1177                         skbn->sk   = sk;
1178                         skbn->free = 1;
1179                         skbn->arp  = 1;
1180
1181                         skb_reserve(skbn, frontlen);
1182
1183                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1184
1185                         /* Copy the user data */
1186                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1187                         skb_pull(skb, lg);
1188
1189                         /* Duplicate the Header */
1190                         skb_push(skbn, ROSE_MIN_LEN);
1191                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1192
1193                         if (skb->len > 0)
1194                                 skbn->data[2] |= M_BIT;
1195
1196                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1197                 }
1198
1199                 skb->free = 1;
1200                 kfree_skb(skb);
1201         } else {
1202                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1203         }
1204 #else
1205         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1206 #endif
1207
1208         rose_kick(sk);
1209
1210         return len;
1211 }
1212
1213
1214 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1215                         struct msghdr *msg, size_t size, int flags)
1216 {
1217         struct sock *sk = sock->sk;
1218         struct rose_sock *rose = rose_sk(sk);
1219         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1220         size_t copied;
1221         unsigned char *asmptr;
1222         struct sk_buff *skb;
1223         int n, er, qbit;
1224
1225         /*
1226          * This works for seqpacket too. The receiver has ordered the queue for
1227          * us! We do one quick check first though
1228          */
1229         if (sk->sk_state != TCP_ESTABLISHED)
1230                 return -ENOTCONN;
1231
1232         /* Now we can treat all alike */
1233         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1234                 return er;
1235
1236         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1237
1238         skb_pull(skb, ROSE_MIN_LEN);
1239
1240         if (rose->qbitincl) {
1241                 asmptr  = skb_push(skb, 1);
1242                 *asmptr = qbit;
1243         }
1244
1245         skb_reset_transport_header(skb);
1246         copied     = skb->len;
1247
1248         if (copied > size) {
1249                 copied = size;
1250                 msg->msg_flags |= MSG_TRUNC;
1251         }
1252
1253         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1254
1255         if (srose != NULL) {
1256                 srose->srose_family = AF_ROSE;
1257                 srose->srose_addr   = rose->dest_addr;
1258                 srose->srose_call   = rose->dest_call;
1259                 srose->srose_ndigis = rose->dest_ndigis;
1260                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1261                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1262                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1263                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1264                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1265                 } else {
1266                         if (rose->dest_ndigis >= 1) {
1267                                 srose->srose_ndigis = 1;
1268                                 srose->srose_digi = rose->dest_digis[0];
1269                         }
1270                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1271                 }
1272         }
1273
1274         skb_free_datagram(sk, skb);
1275
1276         return copied;
1277 }
1278
1279
1280 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1281 {
1282         struct sock *sk = sock->sk;
1283         struct rose_sock *rose = rose_sk(sk);
1284         void __user *argp = (void __user *)arg;
1285
1286         switch (cmd) {
1287         case TIOCOUTQ: {
1288                 long amount;
1289                 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1290                 if (amount < 0)
1291                         amount = 0;
1292                 return put_user(amount, (unsigned int __user *) argp);
1293         }
1294
1295         case TIOCINQ: {
1296                 struct sk_buff *skb;
1297                 long amount = 0L;
1298                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1299                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1300                         amount = skb->len;
1301                 return put_user(amount, (unsigned int __user *) argp);
1302         }
1303
1304         case SIOCGSTAMP:
1305                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1306
1307         case SIOCGSTAMPNS:
1308                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1309
1310         case SIOCGIFADDR:
1311         case SIOCSIFADDR:
1312         case SIOCGIFDSTADDR:
1313         case SIOCSIFDSTADDR:
1314         case SIOCGIFBRDADDR:
1315         case SIOCSIFBRDADDR:
1316         case SIOCGIFNETMASK:
1317         case SIOCSIFNETMASK:
1318         case SIOCGIFMETRIC:
1319         case SIOCSIFMETRIC:
1320                 return -EINVAL;
1321
1322         case SIOCADDRT:
1323         case SIOCDELRT:
1324         case SIOCRSCLRRT:
1325                 if (!capable(CAP_NET_ADMIN))
1326                         return -EPERM;
1327                 return rose_rt_ioctl(cmd, argp);
1328
1329         case SIOCRSGCAUSE: {
1330                 struct rose_cause_struct rose_cause;
1331                 rose_cause.cause      = rose->cause;
1332                 rose_cause.diagnostic = rose->diagnostic;
1333                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1334         }
1335
1336         case SIOCRSSCAUSE: {
1337                 struct rose_cause_struct rose_cause;
1338                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1339                         return -EFAULT;
1340                 rose->cause      = rose_cause.cause;
1341                 rose->diagnostic = rose_cause.diagnostic;
1342                 return 0;
1343         }
1344
1345         case SIOCRSSL2CALL:
1346                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1347                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1348                         ax25_listen_release(&rose_callsign, NULL);
1349                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1350                         return -EFAULT;
1351                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1352                         return ax25_listen_register(&rose_callsign, NULL);
1353
1354                 return 0;
1355
1356         case SIOCRSGL2CALL:
1357                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1358
1359         case SIOCRSACCEPT:
1360                 if (rose->state == ROSE_STATE_5) {
1361                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1362                         rose_start_idletimer(sk);
1363                         rose->condition = 0x00;
1364                         rose->vs        = 0;
1365                         rose->va        = 0;
1366                         rose->vr        = 0;
1367                         rose->vl        = 0;
1368                         rose->state     = ROSE_STATE_3;
1369                 }
1370                 return 0;
1371
1372         default:
1373                 return -ENOIOCTLCMD;
1374         }
1375
1376         return 0;
1377 }
1378
1379 #ifdef CONFIG_PROC_FS
1380 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
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 {
1409         spin_unlock_bh(&rose_list_lock);
1410 }
1411
1412 static int rose_info_show(struct seq_file *seq, void *v)
1413 {
1414         char buf[11];
1415
1416         if (v == SEQ_START_TOKEN)
1417                 seq_puts(seq,
1418                          "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");
1419
1420         else {
1421                 struct sock *s = v;
1422                 struct rose_sock *rose = rose_sk(s);
1423                 const char *devname, *callsign;
1424                 const struct net_device *dev = rose->device;
1425
1426                 if (!dev)
1427                         devname = "???";
1428                 else
1429                         devname = dev->name;
1430
1431                 seq_printf(seq, "%-10s %-9s ",
1432                         rose2asc(&rose->dest_addr),
1433                         ax2asc(buf, &rose->dest_call));
1434
1435                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1436                         callsign = "??????-?";
1437                 else
1438                         callsign = ax2asc(buf, &rose->source_call);
1439
1440                 seq_printf(seq,
1441                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1442                         rose2asc(&rose->source_addr),
1443                         callsign,
1444                         devname,
1445                         rose->lci & 0x0FFF,
1446                         (rose->neighbour) ? rose->neighbour->number : 0,
1447                         rose->state,
1448                         rose->vs,
1449                         rose->vr,
1450                         rose->va,
1451                         ax25_display_timer(&rose->timer) / HZ,
1452                         rose->t1 / HZ,
1453                         rose->t2 / HZ,
1454                         rose->t3 / HZ,
1455                         rose->hb / HZ,
1456                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1457                         rose->idle / (60 * HZ),
1458                         atomic_read(&s->sk_wmem_alloc),
1459                         atomic_read(&s->sk_rmem_alloc),
1460                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1461         }
1462
1463         return 0;
1464 }
1465
1466 static const struct seq_operations rose_info_seqops = {
1467         .start = rose_info_start,
1468         .next = rose_info_next,
1469         .stop = rose_info_stop,
1470         .show = rose_info_show,
1471 };
1472
1473 static int rose_info_open(struct inode *inode, struct file *file)
1474 {
1475         return seq_open(file, &rose_info_seqops);
1476 }
1477
1478 static const struct file_operations rose_info_fops = {
1479         .owner = THIS_MODULE,
1480         .open = rose_info_open,
1481         .read = seq_read,
1482         .llseek = seq_lseek,
1483         .release = seq_release,
1484 };
1485 #endif  /* CONFIG_PROC_FS */
1486
1487 static struct net_proto_family rose_family_ops = {
1488         .family         =       PF_ROSE,
1489         .create         =       rose_create,
1490         .owner          =       THIS_MODULE,
1491 };
1492
1493 static struct proto_ops rose_proto_ops = {
1494         .family         =       PF_ROSE,
1495         .owner          =       THIS_MODULE,
1496         .release        =       rose_release,
1497         .bind           =       rose_bind,
1498         .connect        =       rose_connect,
1499         .socketpair     =       sock_no_socketpair,
1500         .accept         =       rose_accept,
1501         .getname        =       rose_getname,
1502         .poll           =       datagram_poll,
1503         .ioctl          =       rose_ioctl,
1504         .listen         =       rose_listen,
1505         .shutdown       =       sock_no_shutdown,
1506         .setsockopt     =       rose_setsockopt,
1507         .getsockopt     =       rose_getsockopt,
1508         .sendmsg        =       rose_sendmsg,
1509         .recvmsg        =       rose_recvmsg,
1510         .mmap           =       sock_no_mmap,
1511         .sendpage       =       sock_no_sendpage,
1512 };
1513
1514 static struct notifier_block rose_dev_notifier = {
1515         .notifier_call  =       rose_device_event,
1516 };
1517
1518 static struct net_device **dev_rose;
1519
1520 static struct ax25_protocol rose_pid = {
1521         .pid    = AX25_P_ROSE,
1522         .func   = rose_route_frame
1523 };
1524
1525 static struct ax25_linkfail rose_linkfail_notifier = {
1526         .func   = rose_link_failed
1527 };
1528
1529 static int __init rose_proto_init(void)
1530 {
1531         int i;
1532         int rc;
1533
1534         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1535                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1536                 rc = -EINVAL;
1537                 goto out;
1538         }
1539
1540         rc = proto_register(&rose_proto, 0);
1541         if (rc != 0)
1542                 goto out;
1543
1544         rose_callsign = null_ax25_address;
1545
1546         dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1547         if (dev_rose == NULL) {
1548                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1549                 rc = -ENOMEM;
1550                 goto out_proto_unregister;
1551         }
1552
1553         for (i = 0; i < rose_ndevs; i++) {
1554                 struct net_device *dev;
1555                 char name[IFNAMSIZ];
1556
1557                 sprintf(name, "rose%d", i);
1558                 dev = alloc_netdev(sizeof(struct net_device_stats),
1559                                    name, rose_setup);
1560                 if (!dev) {
1561                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1562                         rc = -ENOMEM;
1563                         goto fail;
1564                 }
1565                 rc = register_netdev(dev);
1566                 if (rc) {
1567                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1568                         free_netdev(dev);
1569                         goto fail;
1570                 }
1571                 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key);
1572                 dev_rose[i] = dev;
1573         }
1574
1575         sock_register(&rose_family_ops);
1576         register_netdevice_notifier(&rose_dev_notifier);
1577
1578         ax25_register_pid(&rose_pid);
1579         ax25_linkfail_register(&rose_linkfail_notifier);
1580
1581 #ifdef CONFIG_SYSCTL
1582         rose_register_sysctl();
1583 #endif
1584         rose_loopback_init();
1585
1586         rose_add_loopback_neigh();
1587
1588         proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1589         proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1590         proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1591         proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1592 out:
1593         return rc;
1594 fail:
1595         while (--i >= 0) {
1596                 unregister_netdev(dev_rose[i]);
1597                 free_netdev(dev_rose[i]);
1598         }
1599         kfree(dev_rose);
1600 out_proto_unregister:
1601         proto_unregister(&rose_proto);
1602         goto out;
1603 }
1604 module_init(rose_proto_init);
1605
1606 module_param(rose_ndevs, int, 0);
1607 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1608
1609 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1610 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1611 MODULE_LICENSE("GPL");
1612 MODULE_ALIAS_NETPROTO(PF_ROSE);
1613
1614 static void __exit rose_exit(void)
1615 {
1616         int i;
1617
1618         proc_net_remove(&init_net, "rose");
1619         proc_net_remove(&init_net, "rose_neigh");
1620         proc_net_remove(&init_net, "rose_nodes");
1621         proc_net_remove(&init_net, "rose_routes");
1622         rose_loopback_clear();
1623
1624         rose_rt_free();
1625
1626         ax25_protocol_release(AX25_P_ROSE);
1627         ax25_linkfail_release(&rose_linkfail_notifier);
1628
1629         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1630                 ax25_listen_release(&rose_callsign, NULL);
1631
1632 #ifdef CONFIG_SYSCTL
1633         rose_unregister_sysctl();
1634 #endif
1635         unregister_netdevice_notifier(&rose_dev_notifier);
1636
1637         sock_unregister(PF_ROSE);
1638
1639         for (i = 0; i < rose_ndevs; i++) {
1640                 struct net_device *dev = dev_rose[i];
1641
1642                 if (dev) {
1643                         unregister_netdev(dev);
1644                         free_netdev(dev);
1645                 }
1646         }
1647
1648         kfree(dev_rose);
1649         proto_unregister(&rose_proto);
1650 }
1651
1652 module_exit(rose_exit);