net/rose/af_rose.c

   1 /*
   2  *      ROSE release 003
   3  *
   4  *      This code REQUIRES 2.1.15 or higher/ NET3.038
   5  *
   6  *      This module:
   7  *              This module is free software; you can redistribute it and/or
   8  *              modify it under the terms of the GNU General Public License
   9  *              as published by the Free Software Foundation; either version
  10  *              2 of the License, or (at your option) any later version.
  11  *
  12  *      History
  13  *      ROSE 001        Jonathan(G4KLX) Cloned from af_netrom.c.
  14  *                      Alan(GW4PTS)    Hacked up for newer API stuff
  15  *                      Terry (VK2KTJ)  Added support for variable length
  16  *                                      address masks.
  17  *      ROSE 002        Jonathan(G4KLX) Changed hdrincl to qbitincl.
  18  *                                      Added random number facilities entry.
  19  *                                      Variable number of ROSE devices.
  20  *      ROSE 003        Jonathan(G4KLX) New timer architecture.
  21  *                                      Implemented idle timer.
  22  *                                      Added use count to neighbour.
  23  *                      Tomi(OH2BNS)    Fixed rose_getname().
  24  *                      Arnaldo C. Melo s/suser/capable/ + micro cleanups
  25  *                      Joroen (PE1RXQ) Use sock_orphan() on release.
  26  *
  27  *  ROSE 0.63   Jean-Paul(F6FBB) Fixed wrong length of L3 packets
  28  *                                      Added CLEAR_REQUEST facilities
  29  *  ROSE 0.64   Jean-Paul(F6FBB) Fixed null pointer in rose_kill_by_device
  30  */
  31
  32 #include <linux/config.h>
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35 #include <linux/errno.h>
  36 #include <linux/types.h>
  37 #include <linux/socket.h>
  38 #include <linux/in.h>
  39 #include <linux/kernel.h>
  40 #include <linux/sched.h>
  41 #include <linux/timer.h>
  42 #include <linux/string.h>
  43 #include <linux/sockios.h>
  44 #include <linux/net.h>
  45 #include <linux/stat.h>
  46 #include <net/ax25.h>
  47 #include <linux/inet.h>
  48 #include <linux/netdevice.h>
  49 #include <linux/if_arp.h>
  50 #include <linux/skbuff.h>
  51 #include <net/sock.h>
  52 #include <asm/segment.h>
  53 #include <asm/system.h>
  54 #include <asm/uaccess.h>
  55 #include <linux/fcntl.h>
  56 #include <linux/termios.h>      /* For TIOCINQ/OUTQ */
  57 #include <linux/mm.h>
  58 #include <linux/interrupt.h>
  59 #include <linux/notifier.h>
  60 #include <net/rose.h>
  61 #include <linux/proc_fs.h>
  62 #include <net/ip.h>
  63 #include <net/arp.h>
  64
  65 int rose_ndevs = 10;
  66
  67 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
  68 int sysctl_rose_call_request_timeout    = ROSE_DEFAULT_T1;
  69 int sysctl_rose_reset_request_timeout   = ROSE_DEFAULT_T2;
  70 int sysctl_rose_clear_request_timeout   = ROSE_DEFAULT_T3;
  71 int sysctl_rose_no_activity_timeout     = ROSE_DEFAULT_IDLE;
  72 int sysctl_rose_ack_hold_back_timeout   = ROSE_DEFAULT_HB;
  73 int sysctl_rose_routing_control         = ROSE_DEFAULT_ROUTING;
  74 int sysctl_rose_link_fail_timeout       = ROSE_DEFAULT_FAIL_TIMEOUT;
  75 int sysctl_rose_maximum_vcs             = ROSE_DEFAULT_MAXVC;
  76 int sysctl_rose_window_size             = ROSE_DEFAULT_WINDOW_SIZE;
  77
  78 static struct sock *rose_list;
  79
  80 static struct proto_ops rose_proto_ops;
  81
  82 ax25_address rose_callsign;
  83
  84 /*
  85  *      Convert a ROSE address into text.
  86  */
  87 char *rose2asc(rose_address *addr)
  88 {
  89         static char buffer[11];
  90
  91         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
  92             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
  93             addr->rose_addr[4] == 0x00) {
  94                 strcpy(buffer, "*");
  95         } else {
  96                 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
  97                                                 addr->rose_addr[1] & 0xFF,
  98                                                 addr->rose_addr[2] & 0xFF,
  99                                                 addr->rose_addr[3] & 0xFF,
 100                                                 addr->rose_addr[4] & 0xFF);
 101         }
 102
 103         return buffer;
 104 }
 105
 106 /*
 107  *      Compare two ROSE addresses, 0 == equal.
 108  */
 109 int rosecmp(rose_address *addr1, rose_address *addr2)
 110 {
 111         int i;
 112
 113         for (i = 0; i < 5; i++)
 114                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
 115                         return 1;
 116
 117         return 0;
 118 }
 119
 120 /*
 121  *      Compare two ROSE addresses for only mask digits, 0 == equal.
 122  */
 123 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 124 {
 125         int i, j;
 126
 127         if (mask > 10)
 128                 return 1;
 129
 130         for (i = 0; i < mask; i++) {
 131                 j = i / 2;
 132
 133                 if ((i % 2) != 0) {
 134                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
 135                                 return 1;
 136                 } else {
 137                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
 138                                 return 1;
 139                 }
 140         }
 141
 142         return 0;
 143 }
 144
 145 static void rose_free_sock(struct sock *sk)
 146 {
 147         sk_free(sk);
 148
 149         MOD_DEC_USE_COUNT;
 150 }
 151
 152 static struct sock *rose_alloc_sock(void)
 153 {
 154         struct sock *sk;
 155         rose_cb *rose;
 156
 157         if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, 1)) == NULL)
 158                 return NULL;
 159
 160         if ((rose = kmalloc(sizeof(*rose), GFP_ATOMIC)) == NULL) {
 161                 sk_free(sk);
 162                 return NULL;
 163         }
 164
 165         MOD_INC_USE_COUNT;
 166
 167         memset(rose, 0x00, sizeof(*rose));
 168
 169         sk->protinfo.rose = rose;
 170         rose->sk          = sk;
 171
 172         return sk;
 173 }
 174
 175 /*
 176  *      Socket removal during an interrupt is now safe.
 177  */
 178 static void rose_remove_socket(struct sock *sk)
 179 {
 180         struct sock *s;
 181         unsigned long flags;
 182
 183         save_flags(flags); cli();
 184
 185         if ((s = rose_list) == sk) {
 186                 rose_list = s->next;
 187                 restore_flags(flags);
 188                 return;
 189         }
 190
 191         while (s != NULL && s->next != NULL) {
 192                 if (s->next == sk) {
 193                         s->next = sk->next;
 194                         restore_flags(flags);
 195                         return;
 196                 }
 197
 198                 s = s->next;
 199         }
 200
 201         restore_flags(flags);
 202 }
 203
 204 /*
 205  *      Kill all bound sockets on a broken link layer connection to a
 206  *      particular neighbour.
 207  */
 208 void rose_kill_by_neigh(struct rose_neigh *neigh)
 209 {
 210         struct sock *s;
 211
 212         for (s = rose_list; s != NULL; s = s->next) {
 213                 if (s->protinfo.rose->neighbour == neigh) {
 214                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 215                         s->protinfo.rose->neighbour->use--;
 216                         s->protinfo.rose->neighbour = NULL;
 217                 }
 218         }
 219 }
 220
 221 /*
 222  *      Kill all bound sockets on a dropped device.
 223  */
 224 static void rose_kill_by_device(struct net_device *dev)
 225 {
 226         struct sock *s;
 227
 228         for (s = rose_list; s != NULL; s = s->next) {
 229                 if (s->protinfo.rose->device == dev) {
 230                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 231                         if (s->protinfo.rose->neighbour)
 232                                 s->protinfo.rose->neighbour->use--;
 233                         s->protinfo.rose->device = NULL;
 234                 }
 235         }
 236 }
 237
 238 /*
 239  *      Handle device status changes.
 240  */
 241 static int rose_device_event(struct notifier_block *this, unsigned long event, void *ptr)
 242 {
 243         struct net_device *dev = (struct net_device *)ptr;
 244
 245         if (event != NETDEV_DOWN)
 246                 return NOTIFY_DONE;
 247
 248         switch (dev->type) {
 249                 case ARPHRD_ROSE:
 250                         rose_kill_by_device(dev);
 251                         break;
 252                 case ARPHRD_AX25:
 253                         rose_link_device_down(dev);
 254                         rose_rt_device_down(dev);
 255                         break;
 256         }
 257
 258         return NOTIFY_DONE;
 259 }
 260
 261 /*
 262  *      Add a socket to the bound sockets list.
 263  */
 264 static void rose_insert_socket(struct sock *sk)
 265 {
 266         unsigned long flags;
 267
 268         save_flags(flags); cli();
 269
 270         sk->next  = rose_list;
 271         rose_list = sk;
 272
 273         restore_flags(flags);
 274 }
 275
 276 /*
 277  *      Find a socket that wants to accept the Call Request we just
 278  *      received.
 279  */
 280 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 281 {
 282         unsigned long flags;
 283         struct sock *s;
 284
 285         save_flags(flags); cli();
 286
 287         for (s = rose_list; s != NULL; s = s->next) {
 288                 if (rosecmp(&s->protinfo.rose->source_addr, addr) == 0 && ax25cmp(&s->protinfo.rose->source_call, call) == 0 && s->protinfo.rose->source_ndigis == 0 && s->state == TCP_LISTEN) {
 289                         restore_flags(flags);
 290                         return s;
 291                 }
 292         }
 293
 294         for (s = rose_list; s != NULL; s = s->next) {
 295                 if (rosecmp(&s->protinfo.rose->source_addr, addr) == 0 && ax25cmp(&s->protinfo.rose->source_call, &null_ax25_address) == 0 && s->state == TCP_LISTEN) {
 296                         restore_flags(flags);
 297                         return s;
 298                 }
 299         }
 300
 301         restore_flags(flags);
 302         return NULL;
 303 }
 304
 305 /*
 306  *      Find a connected ROSE socket given my LCI and device.
 307  */
 308 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 309 {
 310         struct sock *s;
 311         unsigned long flags;
 312
 313         save_flags(flags); cli();
 314
 315         for (s = rose_list; s != NULL; s = s->next) {
 316                 if (s->protinfo.rose->lci == lci && s->protinfo.rose->neighbour == neigh) {
 317                         restore_flags(flags);
 318                         return s;
 319                 }
 320         }
 321
 322         restore_flags(flags);
 323
 324         return NULL;
 325 }
 326
 327 /*
 328  *      Find a unique LCI for a given device.
 329  */
 330 unsigned int rose_new_lci(struct rose_neigh *neigh)
 331 {
 332         int lci;
 333
 334         if (neigh->dce_mode) {
 335                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 336                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 337                                 return lci;
 338         } else {
 339                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 340                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 341                                 return lci;
 342         }
 343
 344         return 0;
 345 }
 346
 347 /*
 348  *      Deferred destroy.
 349  */
 350 void rose_destroy_socket(struct sock *);
 351
 352 /*
 353  *      Handler for deferred kills.
 354  */
 355 static void rose_destroy_timer(unsigned long data)
 356 {
 357         rose_destroy_socket((struct sock *)data);
 358 }
 359
 360 /*
 361  *      This is called from user mode and the timers. Thus it protects itself against
 362  *      interrupt users but doesn't worry about being called during work.
 363  *      Once it is removed from the queue no interrupt or bottom half will
 364  *      touch it and we are (fairly 8-) ) safe.
 365  */
 366 void rose_destroy_socket(struct sock *sk)       /* Not static as it's used by the timer */
 367 {
 368         struct sk_buff *skb;
 369         unsigned long flags;
 370
 371         save_flags(flags); cli();
 372
 373         rose_stop_heartbeat(sk);
 374         rose_stop_idletimer(sk);
 375         rose_stop_timer(sk);
 376
 377         rose_remove_socket(sk);
 378         rose_clear_queues(sk);          /* Flush the queues */
 379
 380         while ((skb = skb_dequeue(&sk->receive_queue)) != NULL) {
 381                 if (skb->sk != sk) {                    /* A pending connection */
 382                         skb->sk->dead = 1;      /* Queue the unaccepted socket for death */
 383                         rose_start_heartbeat(skb->sk);
 384                         skb->sk->protinfo.rose->state = ROSE_STATE_0;
 385                 }
 386
 387                 kfree_skb(skb);
 388         }
 389
 390         if (atomic_read(&sk->wmem_alloc) != 0 || atomic_read(&sk->rmem_alloc) != 0) {
 391                 /* Defer: outstanding buffers */
 392                 init_timer(&sk->timer);
 393                 sk->timer.expires  = jiffies + 10 * HZ;
 394                 sk->timer.function = rose_destroy_timer;
 395                 sk->timer.data     = (unsigned long)sk;
 396                 add_timer(&sk->timer);
 397         } else {
 398                 rose_free_sock(sk);
 399         }
 400
 401         restore_flags(flags);
 402 }
 403
 404 /*
 405  *      Handling for system calls applied via the various interfaces to a
 406  *      ROSE socket object.
 407  */
 408
 409 static int rose_setsockopt(struct socket *sock, int level, int optname,
 410         char *optval, int optlen)
 411 {
 412         struct sock *sk = sock->sk;
 413         int opt;
 414
 415         if (level != SOL_ROSE)
 416                 return -ENOPROTOOPT;
 417
 418         if (optlen < sizeof(int))
 419                 return -EINVAL;
 420
 421         if (get_user(opt, (int *)optval))
 422                 return -EFAULT;
 423
 424         switch (optname) {
 425                 case ROSE_DEFER:
 426                         sk->protinfo.rose->defer = opt ? 1 : 0;
 427                         return 0;
 428
 429                 case ROSE_T1:
 430                         if (opt < 1)
 431                                 return -EINVAL;
 432                         sk->protinfo.rose->t1 = opt * HZ;
 433                         return 0;
 434
 435                 case ROSE_T2:
 436                         if (opt < 1)
 437                                 return -EINVAL;
 438                         sk->protinfo.rose->t2 = opt * HZ;
 439                         return 0;
 440
 441                 case ROSE_T3:
 442                         if (opt < 1)
 443                                 return -EINVAL;
 444                         sk->protinfo.rose->t3 = opt * HZ;
 445                         return 0;
 446
 447                 case ROSE_HOLDBACK:
 448                         if (opt < 1)
 449                                 return -EINVAL;
 450                         sk->protinfo.rose->hb = opt * HZ;
 451                         return 0;
 452
 453                 case ROSE_IDLE:
 454                         if (opt < 0)
 455                                 return -EINVAL;
 456                         sk->protinfo.rose->idle = opt * 60 * HZ;
 457                         return 0;
 458
 459                 case ROSE_QBITINCL:
 460                         sk->protinfo.rose->qbitincl = opt ? 1 : 0;
 461                         return 0;
 462
 463                 default:
 464                         return -ENOPROTOOPT;
 465         }
 466 }
 467
 468 static int rose_getsockopt(struct socket *sock, int level, int optname,
 469         char *optval, int *optlen)
 470 {
 471         struct sock *sk = sock->sk;
 472         int val = 0;
 473         int len;
 474
 475         if (level != SOL_ROSE)
 476                 return -ENOPROTOOPT;
 477
 478         if (get_user(len, optlen))
 479                 return -EFAULT;
 480
 481         if (len < 0)
 482                 return -EINVAL;
 483
 484         switch (optname) {
 485                 case ROSE_DEFER:
 486                         val = sk->protinfo.rose->defer;
 487                         break;
 488
 489                 case ROSE_T1:
 490                         val = sk->protinfo.rose->t1 / HZ;
 491                         break;
 492
 493                 case ROSE_T2:
 494                         val = sk->protinfo.rose->t2 / HZ;
 495                         break;
 496
 497                 case ROSE_T3:
 498                         val = sk->protinfo.rose->t3 / HZ;
 499                         break;
 500
 501                 case ROSE_HOLDBACK:
 502                         val = sk->protinfo.rose->hb / HZ;
 503                         break;
 504
 505                 case ROSE_IDLE:
 506                         val = sk->protinfo.rose->idle / (60 * HZ);
 507                         break;
 508
 509                 case ROSE_QBITINCL:
 510                         val = sk->protinfo.rose->qbitincl;
 511                         break;
 512
 513                 default:
 514                         return -ENOPROTOOPT;
 515         }
 516
 517         len = min_t(unsigned int, len, sizeof(int));
 518
 519         if (put_user(len, optlen))
 520                 return -EFAULT;
 521
 522         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 523 }
 524
 525 static int rose_listen(struct socket *sock, int backlog)
 526 {
 527         struct sock *sk = sock->sk;
 528
 529         if (sk->state != TCP_LISTEN) {
 530                 sk->protinfo.rose->dest_ndigis = 0;
 531                 memset(&sk->protinfo.rose->dest_addr, '\0', ROSE_ADDR_LEN);
 532                 memset(&sk->protinfo.rose->dest_call, '\0', AX25_ADDR_LEN);
 533                 memset(sk->protinfo.rose->dest_digis, '\0', AX25_ADDR_LEN*ROSE_MAX_DIGIS);
 534                 sk->max_ack_backlog = backlog;
 535                 sk->state           = TCP_LISTEN;
 536                 return 0;
 537         }
 538
 539         return -EOPNOTSUPP;
 540 }
 541
 542 static int rose_create(struct socket *sock, int protocol)
 543 {
 544         struct sock *sk;
 545         rose_cb *rose;
 546
 547         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 548                 return -ESOCKTNOSUPPORT;
 549
 550         if ((sk = rose_alloc_sock()) == NULL)
 551                 return -ENOMEM;
 552
 553         rose = sk->protinfo.rose;
 554
 555         sock_init_data(sock, sk);
 556
 557         skb_queue_head_init(&rose->ack_queue);
 558 #ifdef M_BIT
 559         skb_queue_head_init(&rose->frag_queue);
 560         rose->fraglen    = 0;
 561 #endif
 562
 563         sock->ops    = &rose_proto_ops;
 564         sk->protocol = protocol;
 565
 566         init_timer(&rose->timer);
 567         init_timer(&rose->idletimer);
 568
 569         rose->t1   = sysctl_rose_call_request_timeout;
 570         rose->t2   = sysctl_rose_reset_request_timeout;
 571         rose->t3   = sysctl_rose_clear_request_timeout;
 572         rose->hb   = sysctl_rose_ack_hold_back_timeout;
 573         rose->idle = sysctl_rose_no_activity_timeout;
 574
 575         rose->state = ROSE_STATE_0;
 576
 577         return 0;
 578 }
 579
 580 static struct sock *rose_make_new(struct sock *osk)
 581 {
 582         struct sock *sk;
 583         rose_cb *rose;
 584
 585         if (osk->type != SOCK_SEQPACKET)
 586                 return NULL;
 587
 588         if ((sk = rose_alloc_sock()) == NULL)
 589                 return NULL;
 590
 591         rose = sk->protinfo.rose;
 592
 593         sock_init_data(NULL, sk);
 594
 595         skb_queue_head_init(&rose->ack_queue);
 596 #ifdef M_BIT
 597         skb_queue_head_init(&rose->frag_queue);
 598         rose->fraglen  = 0;
 599 #endif
 600
 601         sk->type     = osk->type;
 602         sk->socket   = osk->socket;
 603         sk->priority = osk->priority;
 604         sk->protocol = osk->protocol;
 605         sk->rcvbuf   = osk->rcvbuf;
 606         sk->sndbuf   = osk->sndbuf;
 607         sk->debug    = osk->debug;
 608         sk->state    = TCP_ESTABLISHED;
 609         sk->sleep    = osk->sleep;
 610         sk->zapped   = osk->zapped;
 611
 612         init_timer(&rose->timer);
 613         init_timer(&rose->idletimer);
 614
 615         rose->t1      = osk->protinfo.rose->t1;
 616         rose->t2      = osk->protinfo.rose->t2;
 617         rose->t3      = osk->protinfo.rose->t3;
 618         rose->hb      = osk->protinfo.rose->hb;
 619         rose->idle    = osk->protinfo.rose->idle;
 620
 621         rose->defer    = osk->protinfo.rose->defer;
 622         rose->device   = osk->protinfo.rose->device;
 623         rose->qbitincl = osk->protinfo.rose->qbitincl;
 624
 625         return sk;
 626 }
 627
 628 static int rose_release(struct socket *sock)
 629 {
 630         struct sock *sk = sock->sk;
 631
 632         if (sk == NULL) return 0;
 633
 634         switch (sk->protinfo.rose->state) {
 635
 636                 case ROSE_STATE_0:
 637                         rose_disconnect(sk, 0, -1, -1);
 638                         rose_destroy_socket(sk);
 639                         break;
 640
 641                 case ROSE_STATE_2:
 642                         sk->protinfo.rose->neighbour->use--;
 643                         rose_disconnect(sk, 0, -1, -1);
 644                         rose_destroy_socket(sk);
 645                         break;
 646
 647                 case ROSE_STATE_1:
 648                 case ROSE_STATE_3:
 649                 case ROSE_STATE_4:
 650                 case ROSE_STATE_5:
 651                         rose_clear_queues(sk);
 652                         rose_stop_idletimer(sk);
 653                         rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 654                         rose_start_t3timer(sk);
 655                         sk->protinfo.rose->state = ROSE_STATE_2;
 656                         sk->state                = TCP_CLOSE;
 657                         sk->shutdown            |= SEND_SHUTDOWN;
 658                         sk->state_change(sk);
 659                         sock_orphan(sk);
 660                         sk->destroy              = 1;
 661                         break;
 662
 663                 default:
 664                         sk->socket = NULL;
 665                         break;
 666         }
 667
 668         sock->sk = NULL;
 669
 670         return 0;
 671 }
 672
 673 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 674 {
 675         struct sock *sk = sock->sk;
 676         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 677         struct net_device *dev;
 678         ax25_address *user, *source;
 679         int n;
 680
 681         if (sk->zapped == 0)
 682                 return -EINVAL;
 683
 684         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 685                 return -EINVAL;
 686
 687         if (addr->srose_family != AF_ROSE)
 688                 return -EINVAL;
 689
 690         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 691                 return -EINVAL;
 692
 693         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 694                 return -EINVAL;
 695
 696         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
 697                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
 698                 return -EADDRNOTAVAIL;
 699         }
 700
 701         source = &addr->srose_call;
 702
 703         if ((user = ax25_findbyuid(current->euid)) == NULL) {
 704                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 705                         return -EACCES;
 706                 user = source;
 707         }
 708
 709         sk->protinfo.rose->source_addr   = addr->srose_addr;
 710         sk->protinfo.rose->source_call   = *user;
 711         sk->protinfo.rose->device        = dev;
 712         sk->protinfo.rose->source_ndigis = addr->srose_ndigis;
 713
 714         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 715                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 716                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 717                         sk->protinfo.rose->source_digis[n] = full_addr->srose_digis[n];
 718         } else {
 719                 if (sk->protinfo.rose->source_ndigis == 1) {
 720                         sk->protinfo.rose->source_digis[0] = addr->srose_digi;
 721                 }
 722         }
 723
 724         rose_insert_socket(sk);
 725
 726         sk->zapped = 0;
 727         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
 728         return 0;
 729 }
 730
 731 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 732 {
 733         struct sock *sk = sock->sk;
 734         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 735         unsigned char cause, diagnostic;
 736         ax25_address *user;
 737         struct net_device *dev;
 738         int n;
 739
 740         if (sk->state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 741                 sock->state = SS_CONNECTED;
 742                 return 0;       /* Connect completed during a ERESTARTSYS event */
 743         }
 744
 745         if (sk->state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 746                 sock->state = SS_UNCONNECTED;
 747                 return -ECONNREFUSED;
 748         }
 749
 750         if (sk->state == TCP_ESTABLISHED)
 751                 return -EISCONN;        /* No reconnect on a seqpacket socket */
 752
 753         sk->state   = TCP_CLOSE;
 754         sock->state = SS_UNCONNECTED;
 755
 756         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 757                 return -EINVAL;
 758
 759         if (addr->srose_family != AF_ROSE)
 760                 return -EINVAL;
 761
 762         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 763                 return -EINVAL;
 764
 765         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 766                 return -EINVAL;
 767
 768         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 769         if ((sk->protinfo.rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 770                 return -EINVAL;
 771
 772         if ((sk->protinfo.rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic)) == NULL)
 773                 return -ENETUNREACH;
 774
 775         if ((sk->protinfo.rose->lci = rose_new_lci(sk->protinfo.rose->neighbour)) == 0)
 776                 return -ENETUNREACH;
 777
 778         if (sk->zapped) {       /* Must bind first - autobinding in this may or may not work */
 779                 sk->zapped = 0;
 780
 781                 if ((dev = rose_dev_first()) == NULL)
 782                         return -ENETUNREACH;
 783
 784                 if ((user = ax25_findbyuid(current->euid)) == NULL)
 785                         return -EINVAL;
 786
 787                 memcpy(&sk->protinfo.rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 788                 sk->protinfo.rose->source_call = *user;
 789                 sk->protinfo.rose->device      = dev;
 790
 791                 rose_insert_socket(sk);         /* Finish the bind */
 792         }
 793
 794         sk->protinfo.rose->dest_addr   = addr->srose_addr;
 795         sk->protinfo.rose->dest_call   = addr->srose_call;
 796         sk->protinfo.rose->rand        = ((int)sk->protinfo.rose & 0xFFFF) + sk->protinfo.rose->lci;
 797         sk->protinfo.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                         sk->protinfo.rose->dest_digis[n] = full_addr->srose_digis[n];
 803         } else {
 804                 if (sk->protinfo.rose->dest_ndigis == 1) {
 805                         sk->protinfo.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->state     = TCP_SYN_SENT;
 812
 813         sk->protinfo.rose->state = ROSE_STATE_1;
 814
 815         sk->protinfo.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->state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
 823                 return -EINPROGRESS;
 824
 825         cli();  /* To avoid races on the sleep */
 826
 827         /*
 828          * A Connect Ack with Choke or timeout or failed routing will go to closed.
 829          */
 830         while (sk->state == TCP_SYN_SENT) {
 831                 interruptible_sleep_on(sk->sleep);
 832                 if (signal_pending(current)) {
 833                         sti();
 834                         return -ERESTARTSYS;
 835                 }
 836         }
 837
 838         if (sk->state != TCP_ESTABLISHED) {
 839                 sti();
 840                 sock->state = SS_UNCONNECTED;
 841                 return sock_error(sk);  /* Always set at this point */
 842         }
 843
 844         sock->state = SS_CONNECTED;
 845
 846         sti();
 847
 848         return 0;
 849 }
 850
 851 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 852 {
 853         struct sock *sk;
 854         struct sock *newsk;
 855         struct sk_buff *skb;
 856
 857         if ((sk = sock->sk) == NULL)
 858                 return -EINVAL;
 859
 860         if (sk->type != SOCK_SEQPACKET)
 861                 return -EOPNOTSUPP;
 862
 863         if (sk->state != TCP_LISTEN)
 864                 return -EINVAL;
 865
 866         /*
 867          *      The write queue this time is holding sockets ready to use
 868          *      hooked into the SABM we saved
 869          */
 870         do {
 871                 cli();
 872                 if ((skb = skb_dequeue(&sk->receive_queue)) == NULL) {
 873                         if (flags & O_NONBLOCK) {
 874                                 sti();
 875                                 return -EWOULDBLOCK;
 876                         }
 877                         interruptible_sleep_on(sk->sleep);
 878                         if (signal_pending(current)) {
 879                                 sti();
 880                                 return -ERESTARTSYS;
 881                         }
 882                 }
 883         } while (skb == NULL);
 884
 885         newsk = skb->sk;
 886         newsk->pair = NULL;
 887         newsk->socket = newsock;
 888         newsk->sleep = &newsock->wait;
 889         sti();
 890
 891         /* Now attach up the new socket */
 892         skb->sk = NULL;
 893         kfree_skb(skb);
 894         sk->ack_backlog--;
 895         newsock->sk = newsk;
 896
 897         return 0;
 898 }
 899
 900 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 901         int *uaddr_len, int peer)
 902 {
 903         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 904         struct sock *sk = sock->sk;
 905         int n;
 906
 907         if (peer != 0) {
 908                 if (sk->state != TCP_ESTABLISHED)
 909                         return -ENOTCONN;
 910                 srose->srose_family = AF_ROSE;
 911                 srose->srose_addr   = sk->protinfo.rose->dest_addr;
 912                 srose->srose_call   = sk->protinfo.rose->dest_call;
 913                 srose->srose_ndigis = sk->protinfo.rose->dest_ndigis;
 914                 for (n = 0 ; n < sk->protinfo.rose->dest_ndigis ; n++)
 915                         srose->srose_digis[n] = sk->protinfo.rose->dest_digis[n];
 916         } else {
 917                 srose->srose_family = AF_ROSE;
 918                 srose->srose_addr   = sk->protinfo.rose->source_addr;
 919                 srose->srose_call   = sk->protinfo.rose->source_call;
 920                 srose->srose_ndigis = sk->protinfo.rose->source_ndigis;
 921                 for (n = 0 ; n < sk->protinfo.rose->source_ndigis ; n++)
 922                         srose->srose_digis[n] = sk->protinfo.rose->source_digis[n];
 923         }
 924
 925         *uaddr_len = sizeof(struct full_sockaddr_rose);
 926         return 0;
 927 }
 928
 929 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 930 {
 931         struct sock *sk;
 932         struct sock *make;
 933         struct rose_facilities_struct facilities;
 934         int n, len;
 935
 936         skb->sk = NULL;         /* Initially we don't know who it's for */
 937
 938         /*
 939          *      skb->data points to the rose frame start
 940          */
 941         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 942
 943         len  = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
 944         len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
 945         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
 946                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 947                 return 0;
 948         }
 949
 950         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
 951
 952         /*
 953          * We can't accept the Call Request.
 954          */
 955         if (sk == NULL || sk->ack_backlog == sk->max_ack_backlog || (make = rose_make_new(sk)) == NULL) {
 956                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
 957                 return 0;
 958         }
 959
 960         skb->sk     = make;
 961         make->state = TCP_ESTABLISHED;
 962
 963         make->protinfo.rose->lci           = lci;
 964         make->protinfo.rose->dest_addr     = facilities.dest_addr;
 965         make->protinfo.rose->dest_call     = facilities.dest_call;
 966         make->protinfo.rose->dest_ndigis   = facilities.dest_ndigis;
 967         for (n = 0 ; n < facilities.dest_ndigis ; n++)
 968                 make->protinfo.rose->dest_digis[n] = facilities.dest_digis[n];
 969         make->protinfo.rose->source_addr   = facilities.source_addr;
 970         make->protinfo.rose->source_call   = facilities.source_call;
 971         make->protinfo.rose->source_ndigis = facilities.source_ndigis;
 972         for (n = 0 ; n < facilities.source_ndigis ; n++)
 973                 make->protinfo.rose->source_digis[n]= facilities.source_digis[n];
 974         make->protinfo.rose->neighbour     = neigh;
 975         make->protinfo.rose->device        = dev;
 976         make->protinfo.rose->facilities    = facilities;
 977
 978         make->protinfo.rose->neighbour->use++;
 979
 980         if (sk->protinfo.rose->defer) {
 981                 make->protinfo.rose->state = ROSE_STATE_5;
 982         } else {
 983                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
 984                 make->protinfo.rose->state = ROSE_STATE_3;
 985                 rose_start_idletimer(make);
 986         }
 987
 988         make->protinfo.rose->condition = 0x00;
 989         make->protinfo.rose->vs        = 0;
 990         make->protinfo.rose->va        = 0;
 991         make->protinfo.rose->vr        = 0;
 992         make->protinfo.rose->vl        = 0;
 993         sk->ack_backlog++;
 994         make->pair = sk;
 995
 996         rose_insert_socket(make);
 997
 998         skb_queue_head(&sk->receive_queue, skb);
 999
1000         rose_start_heartbeat(make);
1001
1002         if (!sk->dead)
1003                 sk->data_ready(sk, skb->len);
1004
1005         return 1;
1006 }
1007
1008 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, int len,
1009                                 struct scm_cookie *scm)
1010 {
1011         struct sock *sk = sock->sk;
1012         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1013         int err;
1014         struct full_sockaddr_rose srose;
1015         struct sk_buff *skb;
1016         unsigned char *asmptr;
1017         int n, size, qbit = 0;
1018
1019         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR))
1020                 return -EINVAL;
1021
1022         if (sk->zapped)
1023                 return -EADDRNOTAVAIL;
1024
1025         if (sk->shutdown & SEND_SHUTDOWN) {
1026                 send_sig(SIGPIPE, current, 0);
1027                 return -EPIPE;
1028         }
1029
1030         if (sk->protinfo.rose->neighbour == NULL || sk->protinfo.rose->device == NULL)
1031                 return -ENETUNREACH;
1032
1033         if (usrose != NULL) {
1034                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1035                         return -EINVAL;
1036                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1037                 memcpy(&srose, usrose, msg->msg_namelen);
1038                 if (rosecmp(&sk->protinfo.rose->dest_addr, &srose.srose_addr) != 0 ||
1039                     ax25cmp(&sk->protinfo.rose->dest_call, &srose.srose_call) != 0)
1040                         return -EISCONN;
1041                 if (srose.srose_ndigis != sk->protinfo.rose->dest_ndigis)
1042                         return -EISCONN;
1043                 if (srose.srose_ndigis == sk->protinfo.rose->dest_ndigis) {
1044                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1045                                 if (ax25cmp(&sk->protinfo.rose->dest_digis[n], &srose.srose_digis[n]) != 0)
1046                                         return -EISCONN;
1047                 }
1048                 if (srose.srose_family != AF_ROSE)
1049                         return -EINVAL;
1050         } else {
1051                 if (sk->state != TCP_ESTABLISHED)
1052                         return -ENOTCONN;
1053
1054                 srose.srose_family = AF_ROSE;
1055                 srose.srose_addr   = sk->protinfo.rose->dest_addr;
1056                 srose.srose_call   = sk->protinfo.rose->dest_call;
1057                 srose.srose_ndigis = sk->protinfo.rose->dest_ndigis;
1058                 for (n = 0 ; n < sk->protinfo.rose->dest_ndigis ; n++)
1059                         srose.srose_digis[n] = sk->protinfo.rose->dest_digis[n];
1060         }
1061
1062         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1063
1064         /* Build a packet */
1065         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1066         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1067
1068         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1069                 return err;
1070
1071         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1072
1073         /*
1074          *      Put the data on the end
1075          */
1076         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1077
1078         asmptr = skb->h.raw = skb_put(skb, len);
1079
1080         memcpy_fromiovec(asmptr, msg->msg_iov, len);
1081
1082         /*
1083          *      If the Q BIT Include socket option is in force, the first
1084          *      byte of the user data is the logical value of the Q Bit.
1085          */
1086         if (sk->protinfo.rose->qbitincl) {
1087                 qbit = skb->data[0];
1088                 skb_pull(skb, 1);
1089         }
1090
1091         /*
1092          *      Push down the ROSE header
1093          */
1094         asmptr = skb_push(skb, ROSE_MIN_LEN);
1095
1096         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1097
1098         /* Build a ROSE Network header */
1099         asmptr[0] = ((sk->protinfo.rose->lci >> 8) & 0x0F) | ROSE_GFI;
1100         asmptr[1] = (sk->protinfo.rose->lci >> 0) & 0xFF;
1101         asmptr[2] = ROSE_DATA;
1102
1103         if (qbit)
1104                 asmptr[0] |= ROSE_Q_BIT;
1105
1106         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1107
1108         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1109
1110         if (sk->state != TCP_ESTABLISHED) {
1111                 kfree_skb(skb);
1112                 return -ENOTCONN;
1113         }
1114
1115 #ifdef M_BIT
1116 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1117         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1118                 unsigned char header[ROSE_MIN_LEN];
1119                 struct sk_buff *skbn;
1120                 int frontlen;
1121                 int lg;
1122
1123                 /* Save a copy of the Header */
1124                 memcpy(header, skb->data, ROSE_MIN_LEN);
1125                 skb_pull(skb, ROSE_MIN_LEN);
1126
1127                 frontlen = skb_headroom(skb);
1128
1129                 while (skb->len > 0) {
1130                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL)
1131                                 return err;
1132
1133                         skbn->sk   = sk;
1134                         skbn->free = 1;
1135                         skbn->arp  = 1;
1136
1137                         skb_reserve(skbn, frontlen);
1138
1139                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1140
1141                         /* Copy the user data */
1142                         memcpy(skb_put(skbn, lg), skb->data, lg);
1143                         skb_pull(skb, lg);
1144
1145                         /* Duplicate the Header */
1146                         skb_push(skbn, ROSE_MIN_LEN);
1147                         memcpy(skbn->data, header, ROSE_MIN_LEN);
1148
1149                         if (skb->len > 0)
1150                                 skbn->data[2] |= M_BIT;
1151
1152                         skb_queue_tail(&sk->write_queue, skbn); /* Throw it on the queue */
1153                 }
1154
1155                 skb->free = 1;
1156                 kfree_skb(skb, FREE_WRITE);
1157         } else {
1158                 skb_queue_tail(&sk->write_queue, skb);          /* Throw it on the queue */
1159         }
1160 #else
1161         skb_queue_tail(&sk->write_queue, skb);  /* Shove it onto the queue */
1162 #endif
1163
1164         rose_kick(sk);
1165
1166         return len;
1167 }
1168
1169
1170 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, int size,
1171                    int flags, struct scm_cookie *scm)
1172 {
1173         struct sock *sk = sock->sk;
1174         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1175         int copied, qbit;
1176         unsigned char *asmptr;
1177         struct sk_buff *skb;
1178         int n, er;
1179
1180         /*
1181          * This works for seqpacket too. The receiver has ordered the queue for
1182          * us! We do one quick check first though
1183          */
1184         if (sk->state != TCP_ESTABLISHED)
1185                 return -ENOTCONN;
1186
1187         /* Now we can treat all alike */
1188         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1189                 return er;
1190
1191         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1192
1193         skb_pull(skb, ROSE_MIN_LEN);
1194
1195         if (sk->protinfo.rose->qbitincl) {
1196                 asmptr  = skb_push(skb, 1);
1197                 *asmptr = qbit;
1198         }
1199
1200         skb->h.raw = skb->data;
1201         copied     = skb->len;
1202
1203         if (copied > size) {
1204                 copied = size;
1205                 msg->msg_flags |= MSG_TRUNC;
1206         }
1207
1208         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1209
1210         if (srose != NULL) {
1211                 srose->srose_family = AF_ROSE;
1212                 srose->srose_addr   = sk->protinfo.rose->dest_addr;
1213                 srose->srose_call   = sk->protinfo.rose->dest_call;
1214                 srose->srose_ndigis = sk->protinfo.rose->dest_ndigis;
1215                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1216                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1217                         for (n = 0 ; n < sk->protinfo.rose->dest_ndigis ; n++)
1218                                 full_srose->srose_digis[n] = sk->protinfo.rose->dest_digis[n];
1219                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1220                 } else {
1221                         if (sk->protinfo.rose->dest_ndigis >= 1) {
1222                                 srose->srose_ndigis = 1;
1223                                 srose->srose_digi = sk->protinfo.rose->dest_digis[0];
1224                         }
1225                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1226                 }
1227         }
1228
1229         skb_free_datagram(sk, skb);
1230
1231         return copied;
1232 }
1233
1234
1235 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1236 {
1237         struct sock *sk = sock->sk;
1238
1239         switch (cmd) {
1240                 case TIOCOUTQ: {
1241                         long amount;
1242                         amount = sk->sndbuf - atomic_read(&sk->wmem_alloc);
1243                         if (amount < 0)
1244                                 amount = 0;
1245                         return put_user(amount, (unsigned int *)arg);
1246                 }
1247
1248                 case TIOCINQ: {
1249                         struct sk_buff *skb;
1250                         long amount = 0L;
1251                         /* These two are safe on a single CPU system as only user tasks fiddle here */
1252                         if ((skb = skb_peek(&sk->receive_queue)) != NULL)
1253                                 amount = skb->len;
1254                         return put_user(amount, (unsigned int *)arg);
1255                 }
1256
1257                 case SIOCGSTAMP:
1258                         if (sk != NULL) {
1259                                 if (sk->stamp.tv_sec == 0)
1260                                         return -ENOENT;
1261                                 return copy_to_user((void *)arg, &sk->stamp, sizeof(struct timeval)) ? -EFAULT : 0;
1262                         }
1263                         return -EINVAL;
1264
1265                 case SIOCGIFADDR:
1266                 case SIOCSIFADDR:
1267                 case SIOCGIFDSTADDR:
1268                 case SIOCSIFDSTADDR:
1269                 case SIOCGIFBRDADDR:
1270                 case SIOCSIFBRDADDR:
1271                 case SIOCGIFNETMASK:
1272                 case SIOCSIFNETMASK:
1273                 case SIOCGIFMETRIC:
1274                 case SIOCSIFMETRIC:
1275                         return -EINVAL;
1276
1277                 case SIOCADDRT:
1278                 case SIOCDELRT:
1279                 case SIOCRSCLRRT:
1280                         if (!capable(CAP_NET_ADMIN)) return -EPERM;
1281                         return rose_rt_ioctl(cmd, (void *)arg);
1282
1283                 case SIOCRSGCAUSE: {
1284                         struct rose_cause_struct rose_cause;
1285                         rose_cause.cause      = sk->protinfo.rose->cause;
1286                         rose_cause.diagnostic = sk->protinfo.rose->diagnostic;
1287                         return copy_to_user((void *)arg, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1288                 }
1289
1290                 case SIOCRSSCAUSE: {
1291                         struct rose_cause_struct rose_cause;
1292                         if (copy_from_user(&rose_cause, (void *)arg, sizeof(struct rose_cause_struct)))
1293                                 return -EFAULT;
1294                         sk->protinfo.rose->cause      = rose_cause.cause;
1295                         sk->protinfo.rose->diagnostic = rose_cause.diagnostic;
1296                         return 0;
1297                 }
1298
1299                 case SIOCRSSL2CALL:
1300                         if (!capable(CAP_NET_ADMIN)) return -EPERM;
1301                         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1302                                 ax25_listen_release(&rose_callsign, NULL);
1303                         if (copy_from_user(&rose_callsign, (void *)arg, sizeof(ax25_address)))
1304                                 return -EFAULT;
1305                         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1306                                 ax25_listen_register(&rose_callsign, NULL);
1307                         return 0;
1308
1309                 case SIOCRSGL2CALL:
1310                         return copy_to_user((void *)arg, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1311
1312                 case SIOCRSACCEPT:
1313                         if (sk->protinfo.rose->state == ROSE_STATE_5) {
1314                                 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1315                                 rose_start_idletimer(sk);
1316                                 sk->protinfo.rose->condition = 0x00;
1317                                 sk->protinfo.rose->vs        = 0;
1318                                 sk->protinfo.rose->va        = 0;
1319                                 sk->protinfo.rose->vr        = 0;
1320                                 sk->protinfo.rose->vl        = 0;
1321                                 sk->protinfo.rose->state     = ROSE_STATE_3;
1322                         }
1323                         return 0;
1324
1325                 default:
1326                         return dev_ioctl(cmd, (void *)arg);
1327         }
1328
1329         /*NOTREACHED*/
1330         return 0;
1331 }
1332
1333 static int rose_get_info(char *buffer, char **start, off_t offset, int length)
1334 {
1335         struct sock *s;
1336         struct net_device *dev;
1337         const char *devname, *callsign;
1338         int len = 0;
1339         off_t pos = 0;
1340         off_t begin = 0;
1341
1342         cli();
1343
1344         len += sprintf(buffer, "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");
1345
1346         for (s = rose_list; s != NULL; s = s->next) {
1347                 if ((dev = s->protinfo.rose->device) == NULL)
1348                         devname = "???";
1349                 else
1350                         devname = dev->name;
1351
1352                 len += sprintf(buffer + len, "%-10s %-9s ",
1353                         rose2asc(&s->protinfo.rose->dest_addr),
1354                         ax2asc(&s->protinfo.rose->dest_call));
1355
1356                 if (ax25cmp(&s->protinfo.rose->source_call, &null_ax25_address) == 0)
1357                         callsign = "??????-?";
1358                 else
1359                         callsign = ax2asc(&s->protinfo.rose->source_call);
1360
1361                 len += sprintf(buffer + len, "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1362                         rose2asc(&s->protinfo.rose->source_addr),
1363                         callsign,
1364                         devname,
1365                         s->protinfo.rose->lci & 0x0FFF,
1366                         (s->protinfo.rose->neighbour) ? s->protinfo.rose->neighbour->number : 0,
1367                         s->protinfo.rose->state,
1368                         s->protinfo.rose->vs,
1369                         s->protinfo.rose->vr,
1370                         s->protinfo.rose->va,
1371                         ax25_display_timer(&s->protinfo.rose->timer) / HZ,
1372                         s->protinfo.rose->t1 / HZ,
1373                         s->protinfo.rose->t2 / HZ,
1374                         s->protinfo.rose->t3 / HZ,
1375                         s->protinfo.rose->hb / HZ,
1376                         ax25_display_timer(&s->protinfo.rose->idletimer) / (60 * HZ),
1377                         s->protinfo.rose->idle / (60 * HZ),
1378                         atomic_read(&s->wmem_alloc),
1379                         atomic_read(&s->rmem_alloc),
1380                         s->socket != NULL ? s->socket->inode->i_ino : 0L);
1381
1382                 pos = begin + len;
1383
1384                 if (pos < offset) {
1385                         len   = 0;
1386                         begin = pos;
1387                 }
1388
1389                 if (pos > offset + length)
1390                         break;
1391         }
1392
1393         sti();
1394
1395         *start = buffer + (offset - begin);
1396         len   -= (offset - begin);
1397
1398         if (len > length) len = length;
1399
1400         return(len);
1401 }
1402
1403 static struct net_proto_family rose_family_ops = {
1404         family:         PF_ROSE,
1405         create:         rose_create,
1406 };
1407
1408 static struct proto_ops SOCKOPS_WRAPPED(rose_proto_ops) = {
1409         family:         PF_ROSE,
1410
1411         release:        rose_release,
1412         bind:           rose_bind,
1413         connect:        rose_connect,
1414         socketpair:     sock_no_socketpair,
1415         accept:         rose_accept,
1416         getname:        rose_getname,
1417         poll:           datagram_poll,
1418         ioctl:          rose_ioctl,
1419         listen:         rose_listen,
1420         shutdown:       sock_no_shutdown,
1421         setsockopt:     rose_setsockopt,
1422         getsockopt:     rose_getsockopt,
1423         sendmsg:        rose_sendmsg,
1424         recvmsg:        rose_recvmsg,
1425         mmap:           sock_no_mmap,
1426         sendpage:       sock_no_sendpage,
1427 };
1428
1429 #include <linux/smp_lock.h>
1430 SOCKOPS_WRAP(rose_proto, PF_ROSE);
1431
1432 static struct notifier_block rose_dev_notifier = {
1433         notifier_call:  rose_device_event,
1434 };
1435
1436 static struct net_device *dev_rose;
1437
1438 static const char banner[] = KERN_INFO "F6FBB/G4KLX ROSE for Linux. Version 0.64 for AX25.037 Linux 2.4\n";
1439
1440 static int __init rose_proto_init(void)
1441 {
1442         int i;
1443
1444         rose_callsign = null_ax25_address;
1445
1446         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device)) {
1447                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1448                 return -1;
1449         }
1450
1451         if ((dev_rose = kmalloc(rose_ndevs * sizeof(struct net_device), GFP_KERNEL)) == NULL) {
1452                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1453                 return -1;
1454         }
1455
1456         memset(dev_rose, 0x00, rose_ndevs * sizeof(struct net_device));
1457
1458         for (i = 0; i < rose_ndevs; i++) {
1459                 sprintf(dev_rose[i].name, "rose%d", i);
1460                 dev_rose[i].init = rose_init;
1461                 register_netdev(&dev_rose[i]);
1462         }
1463
1464         sock_register(&rose_family_ops);
1465         register_netdevice_notifier(&rose_dev_notifier);
1466         printk(banner);
1467
1468         ax25_protocol_register(AX25_P_ROSE, rose_route_frame);
1469         ax25_linkfail_register(rose_link_failed);
1470
1471 #ifdef CONFIG_SYSCTL
1472         rose_register_sysctl();
1473 #endif
1474         rose_loopback_init();
1475
1476         rose_add_loopback_neigh();
1477
1478         proc_net_create("rose", 0, rose_get_info);
1479         proc_net_create("rose_neigh", 0, rose_neigh_get_info);
1480         proc_net_create("rose_nodes", 0, rose_nodes_get_info);
1481         proc_net_create("rose_routes", 0, rose_routes_get_info);
1482         return 0;
1483 }
1484 module_init(rose_proto_init);
1485
1486 EXPORT_NO_SYMBOLS;
1487
1488 MODULE_PARM(rose_ndevs, "i");
1489 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1490
1491 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1492 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1493 MODULE_LICENSE("GPL");
1494
1495 static void __exit rose_exit(void)
1496 {
1497         int i;
1498
1499         proc_net_remove("rose");
1500         proc_net_remove("rose_neigh");
1501         proc_net_remove("rose_nodes");
1502         proc_net_remove("rose_routes");
1503         rose_loopback_clear();
1504
1505         rose_rt_free();
1506
1507         ax25_protocol_release(AX25_P_ROSE);
1508         ax25_linkfail_release(rose_link_failed);
1509
1510         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1511                 ax25_listen_release(&rose_callsign, NULL);
1512
1513 #ifdef CONFIG_SYSCTL
1514         rose_unregister_sysctl();
1515 #endif
1516         unregister_netdevice_notifier(&rose_dev_notifier);
1517
1518         sock_unregister(PF_ROSE);
1519
1520         for (i = 0; i < rose_ndevs; i++) {
1521                 if (dev_rose[i].priv != NULL) {
1522                         kfree(dev_rose[i].priv);
1523                         dev_rose[i].priv = NULL;
1524                         unregister_netdev(&dev_rose[i]);
1525                 }
1526                 kfree(dev_rose[i].name);
1527         }
1528
1529         kfree(dev_rose);
1530 }
1531 module_exit(rose_exit);
1532