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/slab.h> 22 #include <linux/kernel.h> 23 #include <linux/sched.h> 24 #include <linux/spinlock.h> 25 #include <linux/timer.h> 26 #include <linux/string.h> 27 #include <linux/sockios.h> 28 #include <linux/net.h> 29 #include <linux/stat.h> 30 #include <net/net_namespace.h> 31 #include <net/ax25.h> 32 #include <linux/inet.h> 33 #include <linux/netdevice.h> 34 #include <linux/if_arp.h> 35 #include <linux/skbuff.h> 36 #include <net/sock.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 const 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 static struct lock_class_key rose_netdev_addr_lock_key; 78 79 static void rose_set_lockdep_one(struct net_device *dev, 80 struct netdev_queue *txq, 81 void *_unused) 82 { 83 lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key); 84 } 85 86 static void rose_set_lockdep_key(struct net_device *dev) 87 { 88 lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key); 89 netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL); 90 } 91 92 /* 93 * Convert a ROSE address into text. 94 */ 95 char *rose2asc(char *buf, const rose_address *addr) 96 { 97 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 && 98 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 && 99 addr->rose_addr[4] == 0x00) { 100 strcpy(buf, "*"); 101 } else { 102 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF, 103 addr->rose_addr[1] & 0xFF, 104 addr->rose_addr[2] & 0xFF, 105 addr->rose_addr[3] & 0xFF, 106 addr->rose_addr[4] & 0xFF); 107 } 108 109 return buf; 110 } 111 112 /* 113 * Compare two ROSE addresses, 0 == equal. 114 */ 115 int rosecmp(rose_address *addr1, rose_address *addr2) 116 { 117 int i; 118 119 for (i = 0; i < 5; i++) 120 if (addr1->rose_addr[i] != addr2->rose_addr[i]) 121 return 1; 122 123 return 0; 124 } 125 126 /* 127 * Compare two ROSE addresses for only mask digits, 0 == equal. 128 */ 129 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask) 130 { 131 unsigned int i, j; 132 133 if (mask > 10) 134 return 1; 135 136 for (i = 0; i < mask; i++) { 137 j = i / 2; 138 139 if ((i % 2) != 0) { 140 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F)) 141 return 1; 142 } else { 143 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0)) 144 return 1; 145 } 146 } 147 148 return 0; 149 } 150 151 /* 152 * Socket removal during an interrupt is now safe. 153 */ 154 static void rose_remove_socket(struct sock *sk) 155 { 156 spin_lock_bh(&rose_list_lock); 157 sk_del_node_init(sk); 158 spin_unlock_bh(&rose_list_lock); 159 } 160 161 /* 162 * Kill all bound sockets on a broken link layer connection to a 163 * particular neighbour. 164 */ 165 void rose_kill_by_neigh(struct rose_neigh *neigh) 166 { 167 struct sock *s; 168 169 spin_lock_bh(&rose_list_lock); 170 sk_for_each(s, &rose_list) { 171 struct rose_sock *rose = rose_sk(s); 172 173 if (rose->neighbour == neigh) { 174 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); 175 rose->neighbour->use--; 176 rose->neighbour = NULL; 177 } 178 } 179 spin_unlock_bh(&rose_list_lock); 180 } 181 182 /* 183 * Kill all bound sockets on a dropped device. 184 */ 185 static void rose_kill_by_device(struct net_device *dev) 186 { 187 struct sock *s; 188 189 spin_lock_bh(&rose_list_lock); 190 sk_for_each(s, &rose_list) { 191 struct rose_sock *rose = rose_sk(s); 192 193 if (rose->device == dev) { 194 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); 195 rose->neighbour->use--; 196 rose->device = NULL; 197 } 198 } 199 spin_unlock_bh(&rose_list_lock); 200 } 201 202 /* 203 * Handle device status changes. 204 */ 205 static int rose_device_event(struct notifier_block *this, 206 unsigned long event, void *ptr) 207 { 208 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 209 210 if (!net_eq(dev_net(dev), &init_net)) 211 return NOTIFY_DONE; 212 213 if (event != NETDEV_DOWN) 214 return NOTIFY_DONE; 215 216 switch (dev->type) { 217 case ARPHRD_ROSE: 218 rose_kill_by_device(dev); 219 break; 220 case ARPHRD_AX25: 221 rose_link_device_down(dev); 222 rose_rt_device_down(dev); 223 break; 224 } 225 226 return NOTIFY_DONE; 227 } 228 229 /* 230 * Add a socket to the bound sockets list. 231 */ 232 static void rose_insert_socket(struct sock *sk) 233 { 234 235 spin_lock_bh(&rose_list_lock); 236 sk_add_node(sk, &rose_list); 237 spin_unlock_bh(&rose_list_lock); 238 } 239 240 /* 241 * Find a socket that wants to accept the Call Request we just 242 * received. 243 */ 244 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call) 245 { 246 struct sock *s; 247 248 spin_lock_bh(&rose_list_lock); 249 sk_for_each(s, &rose_list) { 250 struct rose_sock *rose = rose_sk(s); 251 252 if (!rosecmp(&rose->source_addr, addr) && 253 !ax25cmp(&rose->source_call, call) && 254 !rose->source_ndigis && s->sk_state == TCP_LISTEN) 255 goto found; 256 } 257 258 sk_for_each(s, &rose_list) { 259 struct rose_sock *rose = rose_sk(s); 260 261 if (!rosecmp(&rose->source_addr, addr) && 262 !ax25cmp(&rose->source_call, &null_ax25_address) && 263 s->sk_state == TCP_LISTEN) 264 goto found; 265 } 266 s = NULL; 267 found: 268 spin_unlock_bh(&rose_list_lock); 269 return s; 270 } 271 272 /* 273 * Find a connected ROSE socket given my LCI and device. 274 */ 275 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh) 276 { 277 struct sock *s; 278 279 spin_lock_bh(&rose_list_lock); 280 sk_for_each(s, &rose_list) { 281 struct rose_sock *rose = rose_sk(s); 282 283 if (rose->lci == lci && rose->neighbour == neigh) 284 goto found; 285 } 286 s = NULL; 287 found: 288 spin_unlock_bh(&rose_list_lock); 289 return s; 290 } 291 292 /* 293 * Find a unique LCI for a given device. 294 */ 295 unsigned int rose_new_lci(struct rose_neigh *neigh) 296 { 297 int lci; 298 299 if (neigh->dce_mode) { 300 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++) 301 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) 302 return lci; 303 } else { 304 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--) 305 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) 306 return lci; 307 } 308 309 return 0; 310 } 311 312 /* 313 * Deferred destroy. 314 */ 315 void rose_destroy_socket(struct sock *); 316 317 /* 318 * Handler for deferred kills. 319 */ 320 static void rose_destroy_timer(unsigned long data) 321 { 322 rose_destroy_socket((struct sock *)data); 323 } 324 325 /* 326 * This is called from user mode and the timers. Thus it protects itself 327 * against interrupt users but doesn't worry about being called during 328 * work. Once it is removed from the queue no interrupt or bottom half 329 * will touch it and we are (fairly 8-) ) safe. 330 */ 331 void rose_destroy_socket(struct sock *sk) 332 { 333 struct sk_buff *skb; 334 335 rose_remove_socket(sk); 336 rose_stop_heartbeat(sk); 337 rose_stop_idletimer(sk); 338 rose_stop_timer(sk); 339 340 rose_clear_queues(sk); /* Flush the queues */ 341 342 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { 343 if (skb->sk != sk) { /* A pending connection */ 344 /* Queue the unaccepted socket for death */ 345 sock_set_flag(skb->sk, SOCK_DEAD); 346 rose_start_heartbeat(skb->sk); 347 rose_sk(skb->sk)->state = ROSE_STATE_0; 348 } 349 350 kfree_skb(skb); 351 } 352 353 if (sk_has_allocations(sk)) { 354 /* Defer: outstanding buffers */ 355 setup_timer(&sk->sk_timer, rose_destroy_timer, 356 (unsigned long)sk); 357 sk->sk_timer.expires = jiffies + 10 * HZ; 358 add_timer(&sk->sk_timer); 359 } else 360 sock_put(sk); 361 } 362 363 /* 364 * Handling for system calls applied via the various interfaces to a 365 * ROSE socket object. 366 */ 367 368 static int rose_setsockopt(struct socket *sock, int level, int optname, 369 char __user *optval, unsigned int optlen) 370 { 371 struct sock *sk = sock->sk; 372 struct rose_sock *rose = rose_sk(sk); 373 int opt; 374 375 if (level != SOL_ROSE) 376 return -ENOPROTOOPT; 377 378 if (optlen < sizeof(int)) 379 return -EINVAL; 380 381 if (get_user(opt, (int __user *)optval)) 382 return -EFAULT; 383 384 switch (optname) { 385 case ROSE_DEFER: 386 rose->defer = opt ? 1 : 0; 387 return 0; 388 389 case ROSE_T1: 390 if (opt < 1) 391 return -EINVAL; 392 rose->t1 = opt * HZ; 393 return 0; 394 395 case ROSE_T2: 396 if (opt < 1) 397 return -EINVAL; 398 rose->t2 = opt * HZ; 399 return 0; 400 401 case ROSE_T3: 402 if (opt < 1) 403 return -EINVAL; 404 rose->t3 = opt * HZ; 405 return 0; 406 407 case ROSE_HOLDBACK: 408 if (opt < 1) 409 return -EINVAL; 410 rose->hb = opt * HZ; 411 return 0; 412 413 case ROSE_IDLE: 414 if (opt < 0) 415 return -EINVAL; 416 rose->idle = opt * 60 * HZ; 417 return 0; 418 419 case ROSE_QBITINCL: 420 rose->qbitincl = opt ? 1 : 0; 421 return 0; 422 423 default: 424 return -ENOPROTOOPT; 425 } 426 } 427 428 static int rose_getsockopt(struct socket *sock, int level, int optname, 429 char __user *optval, int __user *optlen) 430 { 431 struct sock *sk = sock->sk; 432 struct rose_sock *rose = rose_sk(sk); 433 int val = 0; 434 int len; 435 436 if (level != SOL_ROSE) 437 return -ENOPROTOOPT; 438 439 if (get_user(len, optlen)) 440 return -EFAULT; 441 442 if (len < 0) 443 return -EINVAL; 444 445 switch (optname) { 446 case ROSE_DEFER: 447 val = rose->defer; 448 break; 449 450 case ROSE_T1: 451 val = rose->t1 / HZ; 452 break; 453 454 case ROSE_T2: 455 val = rose->t2 / HZ; 456 break; 457 458 case ROSE_T3: 459 val = rose->t3 / HZ; 460 break; 461 462 case ROSE_HOLDBACK: 463 val = rose->hb / HZ; 464 break; 465 466 case ROSE_IDLE: 467 val = rose->idle / (60 * HZ); 468 break; 469 470 case ROSE_QBITINCL: 471 val = rose->qbitincl; 472 break; 473 474 default: 475 return -ENOPROTOOPT; 476 } 477 478 len = min_t(unsigned int, len, sizeof(int)); 479 480 if (put_user(len, optlen)) 481 return -EFAULT; 482 483 return copy_to_user(optval, &val, len) ? -EFAULT : 0; 484 } 485 486 static int rose_listen(struct socket *sock, int backlog) 487 { 488 struct sock *sk = sock->sk; 489 490 if (sk->sk_state != TCP_LISTEN) { 491 struct rose_sock *rose = rose_sk(sk); 492 493 rose->dest_ndigis = 0; 494 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN); 495 memset(&rose->dest_call, 0, AX25_ADDR_LEN); 496 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS); 497 sk->sk_max_ack_backlog = backlog; 498 sk->sk_state = TCP_LISTEN; 499 return 0; 500 } 501 502 return -EOPNOTSUPP; 503 } 504 505 static struct proto rose_proto = { 506 .name = "ROSE", 507 .owner = THIS_MODULE, 508 .obj_size = sizeof(struct rose_sock), 509 }; 510 511 static int rose_create(struct net *net, struct socket *sock, int protocol, 512 int kern) 513 { 514 struct sock *sk; 515 struct rose_sock *rose; 516 517 if (!net_eq(net, &init_net)) 518 return -EAFNOSUPPORT; 519 520 if (sock->type != SOCK_SEQPACKET || protocol != 0) 521 return -ESOCKTNOSUPPORT; 522 523 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto); 524 if (sk == NULL) 525 return -ENOMEM; 526 527 rose = rose_sk(sk); 528 529 sock_init_data(sock, sk); 530 531 skb_queue_head_init(&rose->ack_queue); 532 #ifdef M_BIT 533 skb_queue_head_init(&rose->frag_queue); 534 rose->fraglen = 0; 535 #endif 536 537 sock->ops = &rose_proto_ops; 538 sk->sk_protocol = protocol; 539 540 init_timer(&rose->timer); 541 init_timer(&rose->idletimer); 542 543 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout); 544 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout); 545 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout); 546 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout); 547 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout); 548 549 rose->state = ROSE_STATE_0; 550 551 return 0; 552 } 553 554 static struct sock *rose_make_new(struct sock *osk) 555 { 556 struct sock *sk; 557 struct rose_sock *rose, *orose; 558 559 if (osk->sk_type != SOCK_SEQPACKET) 560 return NULL; 561 562 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto); 563 if (sk == NULL) 564 return NULL; 565 566 rose = rose_sk(sk); 567 568 sock_init_data(NULL, sk); 569 570 skb_queue_head_init(&rose->ack_queue); 571 #ifdef M_BIT 572 skb_queue_head_init(&rose->frag_queue); 573 rose->fraglen = 0; 574 #endif 575 576 sk->sk_type = osk->sk_type; 577 sk->sk_priority = osk->sk_priority; 578 sk->sk_protocol = osk->sk_protocol; 579 sk->sk_rcvbuf = osk->sk_rcvbuf; 580 sk->sk_sndbuf = osk->sk_sndbuf; 581 sk->sk_state = TCP_ESTABLISHED; 582 sock_copy_flags(sk, osk); 583 584 init_timer(&rose->timer); 585 init_timer(&rose->idletimer); 586 587 orose = rose_sk(osk); 588 rose->t1 = orose->t1; 589 rose->t2 = orose->t2; 590 rose->t3 = orose->t3; 591 rose->hb = orose->hb; 592 rose->idle = orose->idle; 593 rose->defer = orose->defer; 594 rose->device = orose->device; 595 rose->qbitincl = orose->qbitincl; 596 597 return sk; 598 } 599 600 static int rose_release(struct socket *sock) 601 { 602 struct sock *sk = sock->sk; 603 struct rose_sock *rose; 604 605 if (sk == NULL) return 0; 606 607 sock_hold(sk); 608 sock_orphan(sk); 609 lock_sock(sk); 610 rose = rose_sk(sk); 611 612 switch (rose->state) { 613 case ROSE_STATE_0: 614 release_sock(sk); 615 rose_disconnect(sk, 0, -1, -1); 616 lock_sock(sk); 617 rose_destroy_socket(sk); 618 break; 619 620 case ROSE_STATE_2: 621 rose->neighbour->use--; 622 release_sock(sk); 623 rose_disconnect(sk, 0, -1, -1); 624 lock_sock(sk); 625 rose_destroy_socket(sk); 626 break; 627 628 case ROSE_STATE_1: 629 case ROSE_STATE_3: 630 case ROSE_STATE_4: 631 case ROSE_STATE_5: 632 rose_clear_queues(sk); 633 rose_stop_idletimer(sk); 634 rose_write_internal(sk, ROSE_CLEAR_REQUEST); 635 rose_start_t3timer(sk); 636 rose->state = ROSE_STATE_2; 637 sk->sk_state = TCP_CLOSE; 638 sk->sk_shutdown |= SEND_SHUTDOWN; 639 sk->sk_state_change(sk); 640 sock_set_flag(sk, SOCK_DEAD); 641 sock_set_flag(sk, SOCK_DESTROY); 642 break; 643 644 default: 645 break; 646 } 647 648 sock->sk = NULL; 649 release_sock(sk); 650 sock_put(sk); 651 652 return 0; 653 } 654 655 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) 656 { 657 struct sock *sk = sock->sk; 658 struct rose_sock *rose = rose_sk(sk); 659 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; 660 struct net_device *dev; 661 ax25_address *source; 662 ax25_uid_assoc *user; 663 int n; 664 665 if (!sock_flag(sk, SOCK_ZAPPED)) 666 return -EINVAL; 667 668 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) 669 return -EINVAL; 670 671 if (addr->srose_family != AF_ROSE) 672 return -EINVAL; 673 674 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) 675 return -EINVAL; 676 677 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS) 678 return -EINVAL; 679 680 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) 681 return -EADDRNOTAVAIL; 682 683 source = &addr->srose_call; 684 685 user = ax25_findbyuid(current_euid()); 686 if (user) { 687 rose->source_call = user->call; 688 ax25_uid_put(user); 689 } else { 690 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) 691 return -EACCES; 692 rose->source_call = *source; 693 } 694 695 rose->source_addr = addr->srose_addr; 696 rose->device = dev; 697 rose->source_ndigis = addr->srose_ndigis; 698 699 if (addr_len == sizeof(struct full_sockaddr_rose)) { 700 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; 701 for (n = 0 ; n < addr->srose_ndigis ; n++) 702 rose->source_digis[n] = full_addr->srose_digis[n]; 703 } else { 704 if (rose->source_ndigis == 1) { 705 rose->source_digis[0] = addr->srose_digi; 706 } 707 } 708 709 rose_insert_socket(sk); 710 711 sock_reset_flag(sk, SOCK_ZAPPED); 712 713 return 0; 714 } 715 716 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags) 717 { 718 struct sock *sk = sock->sk; 719 struct rose_sock *rose = rose_sk(sk); 720 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; 721 unsigned char cause, diagnostic; 722 struct net_device *dev; 723 ax25_uid_assoc *user; 724 int n, err = 0; 725 726 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) 727 return -EINVAL; 728 729 if (addr->srose_family != AF_ROSE) 730 return -EINVAL; 731 732 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) 733 return -EINVAL; 734 735 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS) 736 return -EINVAL; 737 738 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */ 739 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS) 740 return -EINVAL; 741 742 lock_sock(sk); 743 744 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { 745 /* Connect completed during a ERESTARTSYS event */ 746 sock->state = SS_CONNECTED; 747 goto out_release; 748 } 749 750 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { 751 sock->state = SS_UNCONNECTED; 752 err = -ECONNREFUSED; 753 goto out_release; 754 } 755 756 if (sk->sk_state == TCP_ESTABLISHED) { 757 /* No reconnect on a seqpacket socket */ 758 err = -EISCONN; 759 goto out_release; 760 } 761 762 sk->sk_state = TCP_CLOSE; 763 sock->state = SS_UNCONNECTED; 764 765 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, 766 &diagnostic, 0); 767 if (!rose->neighbour) { 768 err = -ENETUNREACH; 769 goto out_release; 770 } 771 772 rose->lci = rose_new_lci(rose->neighbour); 773 if (!rose->lci) { 774 err = -ENETUNREACH; 775 goto out_release; 776 } 777 778 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ 779 sock_reset_flag(sk, SOCK_ZAPPED); 780 781 if ((dev = rose_dev_first()) == NULL) { 782 err = -ENETUNREACH; 783 goto out_release; 784 } 785 786 user = ax25_findbyuid(current_euid()); 787 if (!user) { 788 err = -EINVAL; 789 goto out_release; 790 } 791 792 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN); 793 rose->source_call = user->call; 794 rose->device = dev; 795 ax25_uid_put(user); 796 797 rose_insert_socket(sk); /* Finish the bind */ 798 } 799 rose->dest_addr = addr->srose_addr; 800 rose->dest_call = addr->srose_call; 801 rose->rand = ((long)rose & 0xFFFF) + rose->lci; 802 rose->dest_ndigis = addr->srose_ndigis; 803 804 if (addr_len == sizeof(struct full_sockaddr_rose)) { 805 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; 806 for (n = 0 ; n < addr->srose_ndigis ; n++) 807 rose->dest_digis[n] = full_addr->srose_digis[n]; 808 } else { 809 if (rose->dest_ndigis == 1) { 810 rose->dest_digis[0] = addr->srose_digi; 811 } 812 } 813 814 /* Move to connecting socket, start sending Connect Requests */ 815 sock->state = SS_CONNECTING; 816 sk->sk_state = TCP_SYN_SENT; 817 818 rose->state = ROSE_STATE_1; 819 820 rose->neighbour->use++; 821 822 rose_write_internal(sk, ROSE_CALL_REQUEST); 823 rose_start_heartbeat(sk); 824 rose_start_t1timer(sk); 825 826 /* Now the loop */ 827 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { 828 err = -EINPROGRESS; 829 goto out_release; 830 } 831 832 /* 833 * A Connect Ack with Choke or timeout or failed routing will go to 834 * closed. 835 */ 836 if (sk->sk_state == TCP_SYN_SENT) { 837 DEFINE_WAIT(wait); 838 839 for (;;) { 840 prepare_to_wait(sk_sleep(sk), &wait, 841 TASK_INTERRUPTIBLE); 842 if (sk->sk_state != TCP_SYN_SENT) 843 break; 844 if (!signal_pending(current)) { 845 release_sock(sk); 846 schedule(); 847 lock_sock(sk); 848 continue; 849 } 850 err = -ERESTARTSYS; 851 break; 852 } 853 finish_wait(sk_sleep(sk), &wait); 854 855 if (err) 856 goto out_release; 857 } 858 859 if (sk->sk_state != TCP_ESTABLISHED) { 860 sock->state = SS_UNCONNECTED; 861 err = sock_error(sk); /* Always set at this point */ 862 goto out_release; 863 } 864 865 sock->state = SS_CONNECTED; 866 867 out_release: 868 release_sock(sk); 869 870 return err; 871 } 872 873 static int rose_accept(struct socket *sock, struct socket *newsock, int flags) 874 { 875 struct sk_buff *skb; 876 struct sock *newsk; 877 DEFINE_WAIT(wait); 878 struct sock *sk; 879 int err = 0; 880 881 if ((sk = sock->sk) == NULL) 882 return -EINVAL; 883 884 lock_sock(sk); 885 if (sk->sk_type != SOCK_SEQPACKET) { 886 err = -EOPNOTSUPP; 887 goto out_release; 888 } 889 890 if (sk->sk_state != TCP_LISTEN) { 891 err = -EINVAL; 892 goto out_release; 893 } 894 895 /* 896 * The write queue this time is holding sockets ready to use 897 * hooked into the SABM we saved 898 */ 899 for (;;) { 900 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); 901 902 skb = skb_dequeue(&sk->sk_receive_queue); 903 if (skb) 904 break; 905 906 if (flags & O_NONBLOCK) { 907 err = -EWOULDBLOCK; 908 break; 909 } 910 if (!signal_pending(current)) { 911 release_sock(sk); 912 schedule(); 913 lock_sock(sk); 914 continue; 915 } 916 err = -ERESTARTSYS; 917 break; 918 } 919 finish_wait(sk_sleep(sk), &wait); 920 if (err) 921 goto out_release; 922 923 newsk = skb->sk; 924 sock_graft(newsk, newsock); 925 926 /* Now attach up the new socket */ 927 skb->sk = NULL; 928 kfree_skb(skb); 929 sk->sk_ack_backlog--; 930 931 out_release: 932 release_sock(sk); 933 934 return err; 935 } 936 937 static int rose_getname(struct socket *sock, struct sockaddr *uaddr, 938 int *uaddr_len, int peer) 939 { 940 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr; 941 struct sock *sk = sock->sk; 942 struct rose_sock *rose = rose_sk(sk); 943 int n; 944 945 memset(srose, 0, sizeof(*srose)); 946 if (peer != 0) { 947 if (sk->sk_state != TCP_ESTABLISHED) 948 return -ENOTCONN; 949 srose->srose_family = AF_ROSE; 950 srose->srose_addr = rose->dest_addr; 951 srose->srose_call = rose->dest_call; 952 srose->srose_ndigis = rose->dest_ndigis; 953 for (n = 0; n < rose->dest_ndigis; n++) 954 srose->srose_digis[n] = rose->dest_digis[n]; 955 } else { 956 srose->srose_family = AF_ROSE; 957 srose->srose_addr = rose->source_addr; 958 srose->srose_call = rose->source_call; 959 srose->srose_ndigis = rose->source_ndigis; 960 for (n = 0; n < rose->source_ndigis; n++) 961 srose->srose_digis[n] = rose->source_digis[n]; 962 } 963 964 *uaddr_len = sizeof(struct full_sockaddr_rose); 965 return 0; 966 } 967 968 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci) 969 { 970 struct sock *sk; 971 struct sock *make; 972 struct rose_sock *make_rose; 973 struct rose_facilities_struct facilities; 974 int n; 975 976 skb->sk = NULL; /* Initially we don't know who it's for */ 977 978 /* 979 * skb->data points to the rose frame start 980 */ 981 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct)); 982 983 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF, 984 skb->len - ROSE_CALL_REQ_FACILITIES_OFF, 985 &facilities)) { 986 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76); 987 return 0; 988 } 989 990 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call); 991 992 /* 993 * We can't accept the Call Request. 994 */ 995 if (sk == NULL || sk_acceptq_is_full(sk) || 996 (make = rose_make_new(sk)) == NULL) { 997 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120); 998 return 0; 999 } 1000 1001 skb->sk = make; 1002 make->sk_state = TCP_ESTABLISHED; 1003 make_rose = rose_sk(make); 1004 1005 make_rose->lci = lci; 1006 make_rose->dest_addr = facilities.dest_addr; 1007 make_rose->dest_call = facilities.dest_call; 1008 make_rose->dest_ndigis = facilities.dest_ndigis; 1009 for (n = 0 ; n < facilities.dest_ndigis ; n++) 1010 make_rose->dest_digis[n] = facilities.dest_digis[n]; 1011 make_rose->source_addr = facilities.source_addr; 1012 make_rose->source_call = facilities.source_call; 1013 make_rose->source_ndigis = facilities.source_ndigis; 1014 for (n = 0 ; n < facilities.source_ndigis ; n++) 1015 make_rose->source_digis[n]= facilities.source_digis[n]; 1016 make_rose->neighbour = neigh; 1017 make_rose->device = dev; 1018 make_rose->facilities = facilities; 1019 1020 make_rose->neighbour->use++; 1021 1022 if (rose_sk(sk)->defer) { 1023 make_rose->state = ROSE_STATE_5; 1024 } else { 1025 rose_write_internal(make, ROSE_CALL_ACCEPTED); 1026 make_rose->state = ROSE_STATE_3; 1027 rose_start_idletimer(make); 1028 } 1029 1030 make_rose->condition = 0x00; 1031 make_rose->vs = 0; 1032 make_rose->va = 0; 1033 make_rose->vr = 0; 1034 make_rose->vl = 0; 1035 sk->sk_ack_backlog++; 1036 1037 rose_insert_socket(make); 1038 1039 skb_queue_head(&sk->sk_receive_queue, skb); 1040 1041 rose_start_heartbeat(make); 1042 1043 if (!sock_flag(sk, SOCK_DEAD)) 1044 sk->sk_data_ready(sk, skb->len); 1045 1046 return 1; 1047 } 1048 1049 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock, 1050 struct msghdr *msg, size_t len) 1051 { 1052 struct sock *sk = sock->sk; 1053 struct rose_sock *rose = rose_sk(sk); 1054 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name; 1055 int err; 1056 struct full_sockaddr_rose srose; 1057 struct sk_buff *skb; 1058 unsigned char *asmptr; 1059 int n, size, qbit = 0; 1060 1061 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) 1062 return -EINVAL; 1063 1064 if (sock_flag(sk, SOCK_ZAPPED)) 1065 return -EADDRNOTAVAIL; 1066 1067 if (sk->sk_shutdown & SEND_SHUTDOWN) { 1068 send_sig(SIGPIPE, current, 0); 1069 return -EPIPE; 1070 } 1071 1072 if (rose->neighbour == NULL || rose->device == NULL) 1073 return -ENETUNREACH; 1074 1075 if (usrose != NULL) { 1076 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose)) 1077 return -EINVAL; 1078 memset(&srose, 0, sizeof(struct full_sockaddr_rose)); 1079 memcpy(&srose, usrose, msg->msg_namelen); 1080 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 || 1081 ax25cmp(&rose->dest_call, &srose.srose_call) != 0) 1082 return -EISCONN; 1083 if (srose.srose_ndigis != rose->dest_ndigis) 1084 return -EISCONN; 1085 if (srose.srose_ndigis == rose->dest_ndigis) { 1086 for (n = 0 ; n < srose.srose_ndigis ; n++) 1087 if (ax25cmp(&rose->dest_digis[n], 1088 &srose.srose_digis[n])) 1089 return -EISCONN; 1090 } 1091 if (srose.srose_family != AF_ROSE) 1092 return -EINVAL; 1093 } else { 1094 if (sk->sk_state != TCP_ESTABLISHED) 1095 return -ENOTCONN; 1096 1097 srose.srose_family = AF_ROSE; 1098 srose.srose_addr = rose->dest_addr; 1099 srose.srose_call = rose->dest_call; 1100 srose.srose_ndigis = rose->dest_ndigis; 1101 for (n = 0 ; n < rose->dest_ndigis ; n++) 1102 srose.srose_digis[n] = rose->dest_digis[n]; 1103 } 1104 1105 /* Build a packet */ 1106 /* Sanity check the packet size */ 1107 if (len > 65535) 1108 return -EMSGSIZE; 1109 1110 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN; 1111 1112 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) 1113 return err; 1114 1115 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN); 1116 1117 /* 1118 * Put the data on the end 1119 */ 1120 1121 skb_reset_transport_header(skb); 1122 skb_put(skb, len); 1123 1124 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len); 1125 if (err) { 1126 kfree_skb(skb); 1127 return err; 1128 } 1129 1130 /* 1131 * If the Q BIT Include socket option is in force, the first 1132 * byte of the user data is the logical value of the Q Bit. 1133 */ 1134 if (rose->qbitincl) { 1135 qbit = skb->data[0]; 1136 skb_pull(skb, 1); 1137 } 1138 1139 /* 1140 * Push down the ROSE header 1141 */ 1142 asmptr = skb_push(skb, ROSE_MIN_LEN); 1143 1144 /* Build a ROSE Network header */ 1145 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI; 1146 asmptr[1] = (rose->lci >> 0) & 0xFF; 1147 asmptr[2] = ROSE_DATA; 1148 1149 if (qbit) 1150 asmptr[0] |= ROSE_Q_BIT; 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 size_t copied; 1220 unsigned char *asmptr; 1221 struct sk_buff *skb; 1222 int n, er, qbit; 1223 1224 /* 1225 * This works for seqpacket too. The receiver has ordered the queue for 1226 * us! We do one quick check first though 1227 */ 1228 if (sk->sk_state != TCP_ESTABLISHED) 1229 return -ENOTCONN; 1230 1231 /* Now we can treat all alike */ 1232 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) 1233 return er; 1234 1235 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT; 1236 1237 skb_pull(skb, ROSE_MIN_LEN); 1238 1239 if (rose->qbitincl) { 1240 asmptr = skb_push(skb, 1); 1241 *asmptr = qbit; 1242 } 1243 1244 skb_reset_transport_header(skb); 1245 copied = skb->len; 1246 1247 if (copied > size) { 1248 copied = size; 1249 msg->msg_flags |= MSG_TRUNC; 1250 } 1251 1252 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 1253 1254 if (msg->msg_name) { 1255 struct sockaddr_rose *srose; 1256 1257 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose)); 1258 srose = msg->msg_name; 1259 srose->srose_family = AF_ROSE; 1260 srose->srose_addr = rose->dest_addr; 1261 srose->srose_call = rose->dest_call; 1262 srose->srose_ndigis = rose->dest_ndigis; 1263 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) { 1264 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name; 1265 for (n = 0 ; n < rose->dest_ndigis ; n++) 1266 full_srose->srose_digis[n] = rose->dest_digis[n]; 1267 msg->msg_namelen = sizeof(struct full_sockaddr_rose); 1268 } else { 1269 if (rose->dest_ndigis >= 1) { 1270 srose->srose_ndigis = 1; 1271 srose->srose_digi = rose->dest_digis[0]; 1272 } 1273 msg->msg_namelen = sizeof(struct sockaddr_rose); 1274 } 1275 } 1276 1277 skb_free_datagram(sk, skb); 1278 1279 return copied; 1280 } 1281 1282 1283 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1284 { 1285 struct sock *sk = sock->sk; 1286 struct rose_sock *rose = rose_sk(sk); 1287 void __user *argp = (void __user *)arg; 1288 1289 switch (cmd) { 1290 case TIOCOUTQ: { 1291 long amount; 1292 1293 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); 1294 if (amount < 0) 1295 amount = 0; 1296 return put_user(amount, (unsigned int __user *) argp); 1297 } 1298 1299 case TIOCINQ: { 1300 struct sk_buff *skb; 1301 long amount = 0L; 1302 /* These two are safe on a single CPU system as only user tasks fiddle here */ 1303 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) 1304 amount = skb->len; 1305 return put_user(amount, (unsigned int __user *) argp); 1306 } 1307 1308 case SIOCGSTAMP: 1309 return sock_get_timestamp(sk, (struct timeval __user *) argp); 1310 1311 case SIOCGSTAMPNS: 1312 return sock_get_timestampns(sk, (struct timespec __user *) argp); 1313 1314 case SIOCGIFADDR: 1315 case SIOCSIFADDR: 1316 case SIOCGIFDSTADDR: 1317 case SIOCSIFDSTADDR: 1318 case SIOCGIFBRDADDR: 1319 case SIOCSIFBRDADDR: 1320 case SIOCGIFNETMASK: 1321 case SIOCSIFNETMASK: 1322 case SIOCGIFMETRIC: 1323 case SIOCSIFMETRIC: 1324 return -EINVAL; 1325 1326 case SIOCADDRT: 1327 case SIOCDELRT: 1328 case SIOCRSCLRRT: 1329 if (!capable(CAP_NET_ADMIN)) 1330 return -EPERM; 1331 return rose_rt_ioctl(cmd, argp); 1332 1333 case SIOCRSGCAUSE: { 1334 struct rose_cause_struct rose_cause; 1335 rose_cause.cause = rose->cause; 1336 rose_cause.diagnostic = rose->diagnostic; 1337 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0; 1338 } 1339 1340 case SIOCRSSCAUSE: { 1341 struct rose_cause_struct rose_cause; 1342 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct))) 1343 return -EFAULT; 1344 rose->cause = rose_cause.cause; 1345 rose->diagnostic = rose_cause.diagnostic; 1346 return 0; 1347 } 1348 1349 case SIOCRSSL2CALL: 1350 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1351 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1352 ax25_listen_release(&rose_callsign, NULL); 1353 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address))) 1354 return -EFAULT; 1355 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1356 return ax25_listen_register(&rose_callsign, NULL); 1357 1358 return 0; 1359 1360 case SIOCRSGL2CALL: 1361 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0; 1362 1363 case SIOCRSACCEPT: 1364 if (rose->state == ROSE_STATE_5) { 1365 rose_write_internal(sk, ROSE_CALL_ACCEPTED); 1366 rose_start_idletimer(sk); 1367 rose->condition = 0x00; 1368 rose->vs = 0; 1369 rose->va = 0; 1370 rose->vr = 0; 1371 rose->vl = 0; 1372 rose->state = ROSE_STATE_3; 1373 } 1374 return 0; 1375 1376 default: 1377 return -ENOIOCTLCMD; 1378 } 1379 1380 return 0; 1381 } 1382 1383 #ifdef CONFIG_PROC_FS 1384 static void *rose_info_start(struct seq_file *seq, loff_t *pos) 1385 __acquires(rose_list_lock) 1386 { 1387 spin_lock_bh(&rose_list_lock); 1388 return seq_hlist_start_head(&rose_list, *pos); 1389 } 1390 1391 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos) 1392 { 1393 return seq_hlist_next(v, &rose_list, pos); 1394 } 1395 1396 static void rose_info_stop(struct seq_file *seq, void *v) 1397 __releases(rose_list_lock) 1398 { 1399 spin_unlock_bh(&rose_list_lock); 1400 } 1401 1402 static int rose_info_show(struct seq_file *seq, void *v) 1403 { 1404 char buf[11], rsbuf[11]; 1405 1406 if (v == SEQ_START_TOKEN) 1407 seq_puts(seq, 1408 "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"); 1409 1410 else { 1411 struct sock *s = sk_entry(v); 1412 struct rose_sock *rose = rose_sk(s); 1413 const char *devname, *callsign; 1414 const struct net_device *dev = rose->device; 1415 1416 if (!dev) 1417 devname = "???"; 1418 else 1419 devname = dev->name; 1420 1421 seq_printf(seq, "%-10s %-9s ", 1422 rose2asc(rsbuf, &rose->dest_addr), 1423 ax2asc(buf, &rose->dest_call)); 1424 1425 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0) 1426 callsign = "??????-?"; 1427 else 1428 callsign = ax2asc(buf, &rose->source_call); 1429 1430 seq_printf(seq, 1431 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n", 1432 rose2asc(rsbuf, &rose->source_addr), 1433 callsign, 1434 devname, 1435 rose->lci & 0x0FFF, 1436 (rose->neighbour) ? rose->neighbour->number : 0, 1437 rose->state, 1438 rose->vs, 1439 rose->vr, 1440 rose->va, 1441 ax25_display_timer(&rose->timer) / HZ, 1442 rose->t1 / HZ, 1443 rose->t2 / HZ, 1444 rose->t3 / HZ, 1445 rose->hb / HZ, 1446 ax25_display_timer(&rose->idletimer) / (60 * HZ), 1447 rose->idle / (60 * HZ), 1448 sk_wmem_alloc_get(s), 1449 sk_rmem_alloc_get(s), 1450 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); 1451 } 1452 1453 return 0; 1454 } 1455 1456 static const struct seq_operations rose_info_seqops = { 1457 .start = rose_info_start, 1458 .next = rose_info_next, 1459 .stop = rose_info_stop, 1460 .show = rose_info_show, 1461 }; 1462 1463 static int rose_info_open(struct inode *inode, struct file *file) 1464 { 1465 return seq_open(file, &rose_info_seqops); 1466 } 1467 1468 static const struct file_operations rose_info_fops = { 1469 .owner = THIS_MODULE, 1470 .open = rose_info_open, 1471 .read = seq_read, 1472 .llseek = seq_lseek, 1473 .release = seq_release, 1474 }; 1475 #endif /* CONFIG_PROC_FS */ 1476 1477 static const struct net_proto_family rose_family_ops = { 1478 .family = PF_ROSE, 1479 .create = rose_create, 1480 .owner = THIS_MODULE, 1481 }; 1482 1483 static const struct proto_ops rose_proto_ops = { 1484 .family = PF_ROSE, 1485 .owner = THIS_MODULE, 1486 .release = rose_release, 1487 .bind = rose_bind, 1488 .connect = rose_connect, 1489 .socketpair = sock_no_socketpair, 1490 .accept = rose_accept, 1491 .getname = rose_getname, 1492 .poll = datagram_poll, 1493 .ioctl = rose_ioctl, 1494 .listen = rose_listen, 1495 .shutdown = sock_no_shutdown, 1496 .setsockopt = rose_setsockopt, 1497 .getsockopt = rose_getsockopt, 1498 .sendmsg = rose_sendmsg, 1499 .recvmsg = rose_recvmsg, 1500 .mmap = sock_no_mmap, 1501 .sendpage = sock_no_sendpage, 1502 }; 1503 1504 static struct notifier_block rose_dev_notifier = { 1505 .notifier_call = rose_device_event, 1506 }; 1507 1508 static struct net_device **dev_rose; 1509 1510 static struct ax25_protocol rose_pid = { 1511 .pid = AX25_P_ROSE, 1512 .func = rose_route_frame 1513 }; 1514 1515 static struct ax25_linkfail rose_linkfail_notifier = { 1516 .func = rose_link_failed 1517 }; 1518 1519 static int __init rose_proto_init(void) 1520 { 1521 int i; 1522 int rc; 1523 1524 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) { 1525 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n"); 1526 rc = -EINVAL; 1527 goto out; 1528 } 1529 1530 rc = proto_register(&rose_proto, 0); 1531 if (rc != 0) 1532 goto out; 1533 1534 rose_callsign = null_ax25_address; 1535 1536 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL); 1537 if (dev_rose == NULL) { 1538 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n"); 1539 rc = -ENOMEM; 1540 goto out_proto_unregister; 1541 } 1542 1543 for (i = 0; i < rose_ndevs; i++) { 1544 struct net_device *dev; 1545 char name[IFNAMSIZ]; 1546 1547 sprintf(name, "rose%d", i); 1548 dev = alloc_netdev(0, name, rose_setup); 1549 if (!dev) { 1550 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n"); 1551 rc = -ENOMEM; 1552 goto fail; 1553 } 1554 rc = register_netdev(dev); 1555 if (rc) { 1556 printk(KERN_ERR "ROSE: netdevice registration failed\n"); 1557 free_netdev(dev); 1558 goto fail; 1559 } 1560 rose_set_lockdep_key(dev); 1561 dev_rose[i] = dev; 1562 } 1563 1564 sock_register(&rose_family_ops); 1565 register_netdevice_notifier(&rose_dev_notifier); 1566 1567 ax25_register_pid(&rose_pid); 1568 ax25_linkfail_register(&rose_linkfail_notifier); 1569 1570 #ifdef CONFIG_SYSCTL 1571 rose_register_sysctl(); 1572 #endif 1573 rose_loopback_init(); 1574 1575 rose_add_loopback_neigh(); 1576 1577 proc_create("rose", S_IRUGO, init_net.proc_net, &rose_info_fops); 1578 proc_create("rose_neigh", S_IRUGO, init_net.proc_net, 1579 &rose_neigh_fops); 1580 proc_create("rose_nodes", S_IRUGO, init_net.proc_net, 1581 &rose_nodes_fops); 1582 proc_create("rose_routes", S_IRUGO, init_net.proc_net, 1583 &rose_routes_fops); 1584 out: 1585 return rc; 1586 fail: 1587 while (--i >= 0) { 1588 unregister_netdev(dev_rose[i]); 1589 free_netdev(dev_rose[i]); 1590 } 1591 kfree(dev_rose); 1592 out_proto_unregister: 1593 proto_unregister(&rose_proto); 1594 goto out; 1595 } 1596 module_init(rose_proto_init); 1597 1598 module_param(rose_ndevs, int, 0); 1599 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices"); 1600 1601 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); 1602 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol"); 1603 MODULE_LICENSE("GPL"); 1604 MODULE_ALIAS_NETPROTO(PF_ROSE); 1605 1606 static void __exit rose_exit(void) 1607 { 1608 int i; 1609 1610 remove_proc_entry("rose", init_net.proc_net); 1611 remove_proc_entry("rose_neigh", init_net.proc_net); 1612 remove_proc_entry("rose_nodes", init_net.proc_net); 1613 remove_proc_entry("rose_routes", init_net.proc_net); 1614 rose_loopback_clear(); 1615 1616 rose_rt_free(); 1617 1618 ax25_protocol_release(AX25_P_ROSE); 1619 ax25_linkfail_release(&rose_linkfail_notifier); 1620 1621 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1622 ax25_listen_release(&rose_callsign, NULL); 1623 1624 #ifdef CONFIG_SYSCTL 1625 rose_unregister_sysctl(); 1626 #endif 1627 unregister_netdevice_notifier(&rose_dev_notifier); 1628 1629 sock_unregister(PF_ROSE); 1630 1631 for (i = 0; i < rose_ndevs; i++) { 1632 struct net_device *dev = dev_rose[i]; 1633 1634 if (dev) { 1635 unregister_netdev(dev); 1636 free_netdev(dev); 1637 } 1638 } 1639 1640 kfree(dev_rose); 1641 proto_unregister(&rose_proto); 1642 } 1643 1644 module_exit(rose_exit); 1645