1/* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License as published by 4 * the Free Software Foundation; either version 2 of the License, or 5 * (at your option) any later version. 6 * 7 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) 8 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk) 9 * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net) 10 * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi) 11 */ 12 13#include <linux/capability.h> 14#include <linux/module.h> 15#include <linux/moduleparam.h> 16#include <linux/init.h> 17#include <linux/errno.h> 18#include <linux/types.h> 19#include <linux/socket.h> 20#include <linux/in.h> 21#include <linux/kernel.h> 22#include <linux/sched.h> 23#include <linux/spinlock.h> 24#include <linux/timer.h> 25#include <linux/string.h> 26#include <linux/sockios.h> 27#include <linux/net.h> 28#include <linux/stat.h> 29#include <net/ax25.h> 30#include <linux/inet.h> 31#include <linux/netdevice.h> 32#include <linux/if_arp.h> 33#include <linux/skbuff.h> 34#include <net/sock.h> 35#include <asm/system.h> 36#include <asm/uaccess.h> 37#include <linux/fcntl.h> 38#include <linux/termios.h> 39#include <linux/mm.h> 40#include <linux/interrupt.h> 41#include <linux/notifier.h> 42#include <net/rose.h> 43#include <linux/proc_fs.h> 44#include <linux/seq_file.h> 45#include <net/tcp_states.h> 46#include <net/ip.h> 47#include <net/arp.h> 48 49static int rose_ndevs = 10; 50 51int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0; 52int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1; 53int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2; 54int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3; 55int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE; 56int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB; 57int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING; 58int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT; 59int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC; 60int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE; 61 62static HLIST_HEAD(rose_list); 63static DEFINE_SPINLOCK(rose_list_lock); 64 65static struct proto_ops rose_proto_ops; 66 67ax25_address rose_callsign; 68 69/* 70 * ROSE network devices are virtual network devices encapsulating ROSE 71 * frames into AX.25 which will be sent through an AX.25 device, so form a 72 * special "super class" of normal net devices; split their locks off into a 73 * separate class since they always nest. 74 */ 75static struct lock_class_key rose_netdev_xmit_lock_key; 76 77/* 78 * Convert a ROSE address into text. 79 */ 80const char *rose2asc(const rose_address *addr) 81{ 82 static char buffer[11]; 83 84 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 && 85 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 && 86 addr->rose_addr[4] == 0x00) { 87 strcpy(buffer, "*"); 88 } else { 89 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF, 90 addr->rose_addr[1] & 0xFF, 91 addr->rose_addr[2] & 0xFF, 92 addr->rose_addr[3] & 0xFF, 93 addr->rose_addr[4] & 0xFF); 94 } 95 96 return buffer; 97} 98 99/* 100 * Compare two ROSE addresses, 0 == equal. 101 */ 102int rosecmp(rose_address *addr1, rose_address *addr2) 103{ 104 int i; 105 106 for (i = 0; i < 5; i++) 107 if (addr1->rose_addr[i] != addr2->rose_addr[i]) 108 return 1; 109 110 return 0; 111} 112 113/* 114 * Compare two ROSE addresses for only mask digits, 0 == equal. 115 */ 116int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask) 117{ 118 int i, j; 119 120 if (mask > 10) 121 return 1; 122 123 for (i = 0; i < mask; i++) { 124 j = i / 2; 125 126 if ((i % 2) != 0) { 127 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F)) 128 return 1; 129 } else { 130 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0)) 131 return 1; 132 } 133 } 134 135 return 0; 136} 137 138/* 139 * Socket removal during an interrupt is now safe. 140 */ 141static void rose_remove_socket(struct sock *sk) 142{ 143 spin_lock_bh(&rose_list_lock); 144 sk_del_node_init(sk); 145 spin_unlock_bh(&rose_list_lock); 146} 147 148/* 149 * Kill all bound sockets on a broken link layer connection to a 150 * particular neighbour. 151 */ 152void rose_kill_by_neigh(struct rose_neigh *neigh) 153{ 154 struct sock *s; 155 struct hlist_node *node; 156 157 spin_lock_bh(&rose_list_lock); 158 sk_for_each(s, node, &rose_list) { 159 struct rose_sock *rose = rose_sk(s); 160 161 if (rose->neighbour == neigh) { 162 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); 163 rose->neighbour->use--; 164 rose->neighbour = NULL; 165 } 166 } 167 spin_unlock_bh(&rose_list_lock); 168} 169 170/* 171 * Kill all bound sockets on a dropped device. 172 */ 173static void rose_kill_by_device(struct net_device *dev) 174{ 175 struct sock *s; 176 struct hlist_node *node; 177 178 spin_lock_bh(&rose_list_lock); 179 sk_for_each(s, node, &rose_list) { 180 struct rose_sock *rose = rose_sk(s); 181 182 if (rose->device == dev) { 183 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); 184 rose->neighbour->use--; 185 rose->device = NULL; 186 } 187 } 188 spin_unlock_bh(&rose_list_lock); 189} 190 191/* 192 * Handle device status changes. 193 */ 194static int rose_device_event(struct notifier_block *this, unsigned long event, 195 void *ptr) 196{ 197 struct net_device *dev = (struct net_device *)ptr; 198 199 if (event != NETDEV_DOWN) 200 return NOTIFY_DONE; 201 202 switch (dev->type) { 203 case ARPHRD_ROSE: 204 rose_kill_by_device(dev); 205 break; 206 case ARPHRD_AX25: 207 rose_link_device_down(dev); 208 rose_rt_device_down(dev); 209 break; 210 } 211 212 return NOTIFY_DONE; 213} 214 215/* 216 * Add a socket to the bound sockets list. 217 */ 218static void rose_insert_socket(struct sock *sk) 219{ 220 221 spin_lock_bh(&rose_list_lock); 222 sk_add_node(sk, &rose_list); 223 spin_unlock_bh(&rose_list_lock); 224} 225 226/* 227 * Find a socket that wants to accept the Call Request we just 228 * received. 229 */ 230static struct sock *rose_find_listener(rose_address *addr, ax25_address *call) 231{ 232 struct sock *s; 233 struct hlist_node *node; 234 235 spin_lock_bh(&rose_list_lock); 236 sk_for_each(s, node, &rose_list) { 237 struct rose_sock *rose = rose_sk(s); 238 239 if (!rosecmp(&rose->source_addr, addr) && 240 !ax25cmp(&rose->source_call, call) && 241 !rose->source_ndigis && s->sk_state == TCP_LISTEN) 242 goto found; 243 } 244 245 sk_for_each(s, node, &rose_list) { 246 struct rose_sock *rose = rose_sk(s); 247 248 if (!rosecmp(&rose->source_addr, addr) && 249 !ax25cmp(&rose->source_call, &null_ax25_address) && 250 s->sk_state == TCP_LISTEN) 251 goto found; 252 } 253 s = NULL; 254found: 255 spin_unlock_bh(&rose_list_lock); 256 return s; 257} 258 259/* 260 * Find a connected ROSE socket given my LCI and device. 261 */ 262struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh) 263{ 264 struct sock *s; 265 struct hlist_node *node; 266 267 spin_lock_bh(&rose_list_lock); 268 sk_for_each(s, node, &rose_list) { 269 struct rose_sock *rose = rose_sk(s); 270 271 if (rose->lci == lci && rose->neighbour == neigh) 272 goto found; 273 } 274 s = NULL; 275found: 276 spin_unlock_bh(&rose_list_lock); 277 return s; 278} 279 280/* 281 * Find a unique LCI for a given device. 282 */ 283unsigned int rose_new_lci(struct rose_neigh *neigh) 284{ 285 int lci; 286 287 if (neigh->dce_mode) { 288 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++) 289 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) 290 return lci; 291 } else { 292 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--) 293 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) 294 return lci; 295 } 296 297 return 0; 298} 299 300/* 301 * Deferred destroy. 302 */ 303void rose_destroy_socket(struct sock *); 304 305/* 306 * Handler for deferred kills. 307 */ 308static void rose_destroy_timer(unsigned long data) 309{ 310 rose_destroy_socket((struct sock *)data); 311} 312 313/* 314 * This is called from user mode and the timers. Thus it protects itself 315 * against interrupt users but doesn't worry about being called during 316 * work. Once it is removed from the queue no interrupt or bottom half 317 * will touch it and we are (fairly 8-) ) safe. 318 */ 319void rose_destroy_socket(struct sock *sk) 320{ 321 struct sk_buff *skb; 322 323 rose_remove_socket(sk); 324 rose_stop_heartbeat(sk); 325 rose_stop_idletimer(sk); 326 rose_stop_timer(sk); 327 328 rose_clear_queues(sk); /* Flush the queues */ 329 330 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { 331 if (skb->sk != sk) { /* A pending connection */ 332 /* Queue the unaccepted socket for death */ 333 sock_set_flag(skb->sk, SOCK_DEAD); 334 rose_start_heartbeat(skb->sk); 335 rose_sk(skb->sk)->state = ROSE_STATE_0; 336 } 337 338 kfree_skb(skb); 339 } 340 341 if (atomic_read(&sk->sk_wmem_alloc) || 342 atomic_read(&sk->sk_rmem_alloc)) { 343 /* Defer: outstanding buffers */ 344 init_timer(&sk->sk_timer); 345 sk->sk_timer.expires = jiffies + 10 * HZ; 346 sk->sk_timer.function = rose_destroy_timer; 347 sk->sk_timer.data = (unsigned long)sk; 348 add_timer(&sk->sk_timer); 349 } else 350 sock_put(sk); 351} 352 353/* 354 * Handling for system calls applied via the various interfaces to a 355 * ROSE socket object. 356 */ 357 358static int rose_setsockopt(struct socket *sock, int level, int optname, 359 char __user *optval, int optlen) 360{ 361 struct sock *sk = sock->sk; 362 struct rose_sock *rose = rose_sk(sk); 363 int opt; 364 365 if (level != SOL_ROSE) 366 return -ENOPROTOOPT; 367 368 if (optlen < sizeof(int)) 369 return -EINVAL; 370 371 if (get_user(opt, (int __user *)optval)) 372 return -EFAULT; 373 374 switch (optname) { 375 case ROSE_DEFER: 376 rose->defer = opt ? 1 : 0; 377 return 0; 378 379 case ROSE_T1: 380 if (opt < 1) 381 return -EINVAL; 382 rose->t1 = opt * HZ; 383 return 0; 384 385 case ROSE_T2: 386 if (opt < 1) 387 return -EINVAL; 388 rose->t2 = opt * HZ; 389 return 0; 390 391 case ROSE_T3: 392 if (opt < 1) 393 return -EINVAL; 394 rose->t3 = opt * HZ; 395 return 0; 396 397 case ROSE_HOLDBACK: 398 if (opt < 1) 399 return -EINVAL; 400 rose->hb = opt * HZ; 401 return 0; 402 403 case ROSE_IDLE: 404 if (opt < 0) 405 return -EINVAL; 406 rose->idle = opt * 60 * HZ; 407 return 0; 408 409 case ROSE_QBITINCL: 410 rose->qbitincl = opt ? 1 : 0; 411 return 0; 412 413 default: 414 return -ENOPROTOOPT; 415 } 416} 417 418static int rose_getsockopt(struct socket *sock, int level, int optname, 419 char __user *optval, int __user *optlen) 420{ 421 struct sock *sk = sock->sk; 422 struct rose_sock *rose = rose_sk(sk); 423 int val = 0; 424 int len; 425 426 if (level != SOL_ROSE) 427 return -ENOPROTOOPT; 428 429 if (get_user(len, optlen)) 430 return -EFAULT; 431 432 if (len < 0) 433 return -EINVAL; 434 435 switch (optname) { 436 case ROSE_DEFER: 437 val = rose->defer; 438 break; 439 440 case ROSE_T1: 441 val = rose->t1 / HZ; 442 break; 443 444 case ROSE_T2: 445 val = rose->t2 / HZ; 446 break; 447 448 case ROSE_T3: 449 val = rose->t3 / HZ; 450 break; 451 452 case ROSE_HOLDBACK: 453 val = rose->hb / HZ; 454 break; 455 456 case ROSE_IDLE: 457 val = rose->idle / (60 * HZ); 458 break; 459 460 case ROSE_QBITINCL: 461 val = rose->qbitincl; 462 break; 463 464 default: 465 return -ENOPROTOOPT; 466 } 467 468 len = min_t(unsigned int, len, sizeof(int)); 469 470 if (put_user(len, optlen)) 471 return -EFAULT; 472 473 return copy_to_user(optval, &val, len) ? -EFAULT : 0; 474} 475 476static int rose_listen(struct socket *sock, int backlog) 477{ 478 struct sock *sk = sock->sk; 479 480 if (sk->sk_state != TCP_LISTEN) { 481 struct rose_sock *rose = rose_sk(sk); 482 483 rose->dest_ndigis = 0; 484 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN); 485 memset(&rose->dest_call, 0, AX25_ADDR_LEN); 486 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS); 487 sk->sk_max_ack_backlog = backlog; 488 sk->sk_state = TCP_LISTEN; 489 return 0; 490 } 491 492 return -EOPNOTSUPP; 493} 494 495static struct proto rose_proto = { 496 .name = "ROSE", 497 .owner = THIS_MODULE, 498 .obj_size = sizeof(struct rose_sock), 499}; 500 501static int rose_create(struct socket *sock, int protocol) 502{ 503 struct sock *sk; 504 struct rose_sock *rose; 505 506 if (sock->type != SOCK_SEQPACKET || protocol != 0) 507 return -ESOCKTNOSUPPORT; 508 509 if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL) 510 return -ENOMEM; 511 512 rose = rose_sk(sk); 513 514 sock_init_data(sock, sk); 515 516 skb_queue_head_init(&rose->ack_queue); 517#ifdef M_BIT 518 skb_queue_head_init(&rose->frag_queue); 519 rose->fraglen = 0; 520#endif 521 522 sock->ops = &rose_proto_ops; 523 sk->sk_protocol = protocol; 524 525 init_timer(&rose->timer); 526 init_timer(&rose->idletimer); 527 528 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout); 529 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout); 530 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout); 531 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout); 532 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout); 533 534 rose->state = ROSE_STATE_0; 535 536 return 0; 537} 538 539static struct sock *rose_make_new(struct sock *osk) 540{ 541 struct sock *sk; 542 struct rose_sock *rose, *orose; 543 544 if (osk->sk_type != SOCK_SEQPACKET) 545 return NULL; 546 547 if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL) 548 return NULL; 549 550 rose = rose_sk(sk); 551 552 sock_init_data(NULL, sk); 553 554 skb_queue_head_init(&rose->ack_queue); 555#ifdef M_BIT 556 skb_queue_head_init(&rose->frag_queue); 557 rose->fraglen = 0; 558#endif 559 560 sk->sk_type = osk->sk_type; 561 sk->sk_socket = osk->sk_socket; 562 sk->sk_priority = osk->sk_priority; 563 sk->sk_protocol = osk->sk_protocol; 564 sk->sk_rcvbuf = osk->sk_rcvbuf; 565 sk->sk_sndbuf = osk->sk_sndbuf; 566 sk->sk_state = TCP_ESTABLISHED; 567 sk->sk_sleep = osk->sk_sleep; 568 sock_copy_flags(sk, osk); 569 570 init_timer(&rose->timer); 571 init_timer(&rose->idletimer); 572 573 orose = rose_sk(osk); 574 rose->t1 = orose->t1; 575 rose->t2 = orose->t2; 576 rose->t3 = orose->t3; 577 rose->hb = orose->hb; 578 rose->idle = orose->idle; 579 rose->defer = orose->defer; 580 rose->device = orose->device; 581 rose->qbitincl = orose->qbitincl; 582 583 return sk; 584} 585 586static int rose_release(struct socket *sock) 587{ 588 struct sock *sk = sock->sk; 589 struct rose_sock *rose; 590 591 if (sk == NULL) return 0; 592 593 rose = rose_sk(sk); 594 595 switch (rose->state) { 596 case ROSE_STATE_0: 597 rose_disconnect(sk, 0, -1, -1); 598 rose_destroy_socket(sk); 599 break; 600 601 case ROSE_STATE_2: 602 rose->neighbour->use--; 603 rose_disconnect(sk, 0, -1, -1); 604 rose_destroy_socket(sk); 605 break; 606 607 case ROSE_STATE_1: 608 case ROSE_STATE_3: 609 case ROSE_STATE_4: 610 case ROSE_STATE_5: 611 rose_clear_queues(sk); 612 rose_stop_idletimer(sk); 613 rose_write_internal(sk, ROSE_CLEAR_REQUEST); 614 rose_start_t3timer(sk); 615 rose->state = ROSE_STATE_2; 616 sk->sk_state = TCP_CLOSE; 617 sk->sk_shutdown |= SEND_SHUTDOWN; 618 sk->sk_state_change(sk); 619 sock_set_flag(sk, SOCK_DEAD); 620 sock_set_flag(sk, SOCK_DESTROY); 621 break; 622 623 default: 624 break; 625 } 626 627 sock->sk = NULL; 628 629 return 0; 630} 631 632static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) 633{ 634 struct sock *sk = sock->sk; 635 struct rose_sock *rose = rose_sk(sk); 636 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; 637 struct net_device *dev; 638 ax25_address *source; 639 ax25_uid_assoc *user; 640 int n; 641 642 if (!sock_flag(sk, SOCK_ZAPPED)) 643 return -EINVAL; 644 645 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) 646 return -EINVAL; 647 648 if (addr->srose_family != AF_ROSE) 649 return -EINVAL; 650 651 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) 652 return -EINVAL; 653 654 if (addr->srose_ndigis > ROSE_MAX_DIGIS) 655 return -EINVAL; 656 657 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) { 658 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n"); 659 return -EADDRNOTAVAIL; 660 } 661 662 source = &addr->srose_call; 663 664 user = ax25_findbyuid(current->euid); 665 if (user) { 666 rose->source_call = user->call; 667 ax25_uid_put(user); 668 } else { 669 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) 670 return -EACCES; 671 rose->source_call = *source; 672 } 673 674 rose->source_addr = addr->srose_addr; 675 rose->device = dev; 676 rose->source_ndigis = addr->srose_ndigis; 677 678 if (addr_len == sizeof(struct full_sockaddr_rose)) { 679 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; 680 for (n = 0 ; n < addr->srose_ndigis ; n++) 681 rose->source_digis[n] = full_addr->srose_digis[n]; 682 } else { 683 if (rose->source_ndigis == 1) { 684 rose->source_digis[0] = addr->srose_digi; 685 } 686 } 687 688 rose_insert_socket(sk); 689 690 sock_reset_flag(sk, SOCK_ZAPPED); 691 SOCK_DEBUG(sk, "ROSE: socket is bound\n"); 692 return 0; 693} 694 695static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags) 696{ 697 struct sock *sk = sock->sk; 698 struct rose_sock *rose = rose_sk(sk); 699 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; 700 unsigned char cause, diagnostic; 701 struct net_device *dev; 702 ax25_uid_assoc *user; 703 int n, err = 0; 704 705 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) 706 return -EINVAL; 707 708 if (addr->srose_family != AF_ROSE) 709 return -EINVAL; 710 711 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) 712 return -EINVAL; 713 714 if (addr->srose_ndigis > ROSE_MAX_DIGIS) 715 return -EINVAL; 716 717 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */ 718 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS) 719 return -EINVAL; 720 721 lock_sock(sk); 722 723 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { 724 /* Connect completed during a ERESTARTSYS event */ 725 sock->state = SS_CONNECTED; 726 goto out_release; 727 } 728 729 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { 730 sock->state = SS_UNCONNECTED; 731 err = -ECONNREFUSED; 732 goto out_release; 733 } 734 735 if (sk->sk_state == TCP_ESTABLISHED) { 736 /* No reconnect on a seqpacket socket */ 737 err = -EISCONN; 738 goto out_release; 739 } 740 741 sk->sk_state = TCP_CLOSE; 742 sock->state = SS_UNCONNECTED; 743 744 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, 745 &diagnostic); 746 if (!rose->neighbour) 747 return -ENETUNREACH; 748 749 rose->lci = rose_new_lci(rose->neighbour); 750 if (!rose->lci) { 751 err = -ENETUNREACH; 752 goto out_release; 753 } 754 755 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ 756 sock_reset_flag(sk, SOCK_ZAPPED); 757 758 if ((dev = rose_dev_first()) == NULL) { 759 err = -ENETUNREACH; 760 goto out_release; 761 } 762 763 user = ax25_findbyuid(current->euid); 764 if (!user) { 765 err = -EINVAL; 766 goto out_release; 767 } 768 769 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN); 770 rose->source_call = user->call; 771 rose->device = dev; 772 ax25_uid_put(user); 773 774 rose_insert_socket(sk); /* Finish the bind */ 775 } 776rose_try_next_neigh: 777 rose->dest_addr = addr->srose_addr; 778 rose->dest_call = addr->srose_call; 779 rose->rand = ((long)rose & 0xFFFF) + rose->lci; 780 rose->dest_ndigis = addr->srose_ndigis; 781 782 if (addr_len == sizeof(struct full_sockaddr_rose)) { 783 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; 784 for (n = 0 ; n < addr->srose_ndigis ; n++) 785 rose->dest_digis[n] = full_addr->srose_digis[n]; 786 } else { 787 if (rose->dest_ndigis == 1) { 788 rose->dest_digis[0] = addr->srose_digi; 789 } 790 } 791 792 /* Move to connecting socket, start sending Connect Requests */ 793 sock->state = SS_CONNECTING; 794 sk->sk_state = TCP_SYN_SENT; 795 796 rose->state = ROSE_STATE_1; 797 798 rose->neighbour->use++; 799 800 rose_write_internal(sk, ROSE_CALL_REQUEST); 801 rose_start_heartbeat(sk); 802 rose_start_t1timer(sk); 803 804 /* Now the loop */ 805 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { 806 err = -EINPROGRESS; 807 goto out_release; 808 } 809 810 /* 811 * A Connect Ack with Choke or timeout or failed routing will go to 812 * closed. 813 */ 814 if (sk->sk_state == TCP_SYN_SENT) { 815 DEFINE_WAIT(wait); 816 817 for (;;) { 818 prepare_to_wait(sk->sk_sleep, &wait, 819 TASK_INTERRUPTIBLE); 820 if (sk->sk_state != TCP_SYN_SENT) 821 break; 822 if (!signal_pending(current)) { 823 release_sock(sk); 824 schedule(); 825 lock_sock(sk); 826 continue; 827 } 828 err = -ERESTARTSYS; 829 break; 830 } 831 finish_wait(sk->sk_sleep, &wait); 832 833 if (err) 834 goto out_release; 835 } 836 837 if (sk->sk_state != TCP_ESTABLISHED) { 838 /* Try next neighbour */ 839 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic); 840 if (rose->neighbour) 841 goto rose_try_next_neigh; 842 843 /* No more neighbours */ 844 sock->state = SS_UNCONNECTED; 845 err = sock_error(sk); /* Always set at this point */ 846 goto out_release; 847 } 848 849 sock->state = SS_CONNECTED; 850 851out_release: 852 release_sock(sk); 853 854 return err; 855} 856 857static int rose_accept(struct socket *sock, struct socket *newsock, int flags) 858{ 859 struct sk_buff *skb; 860 struct sock *newsk; 861 DEFINE_WAIT(wait); 862 struct sock *sk; 863 int err = 0; 864 865 if ((sk = sock->sk) == NULL) 866 return -EINVAL; 867 868 lock_sock(sk); 869 if (sk->sk_type != SOCK_SEQPACKET) { 870 err = -EOPNOTSUPP; 871 goto out_release; 872 } 873 874 if (sk->sk_state != TCP_LISTEN) { 875 err = -EINVAL; 876 goto out_release; 877 } 878 879 /* 880 * The write queue this time is holding sockets ready to use 881 * hooked into the SABM we saved 882 */ 883 for (;;) { 884 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); 885 886 skb = skb_dequeue(&sk->sk_receive_queue); 887 if (skb) 888 break; 889 890 if (flags & O_NONBLOCK) { 891 err = -EWOULDBLOCK; 892 break; 893 } 894 if (!signal_pending(current)) { 895 release_sock(sk); 896 schedule(); 897 lock_sock(sk); 898 continue; 899 } 900 err = -ERESTARTSYS; 901 break; 902 } 903 finish_wait(sk->sk_sleep, &wait); 904 if (err) 905 goto out_release; 906 907 newsk = skb->sk; 908 newsk->sk_socket = newsock; 909 newsk->sk_sleep = &newsock->wait; 910 911 /* Now attach up the new socket */ 912 skb->sk = NULL; 913 kfree_skb(skb); 914 sk->sk_ack_backlog--; 915 newsock->sk = newsk; 916 917out_release: 918 release_sock(sk); 919 920 return err; 921} 922 923static int rose_getname(struct socket *sock, struct sockaddr *uaddr, 924 int *uaddr_len, int peer) 925{ 926 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr; 927 struct sock *sk = sock->sk; 928 struct rose_sock *rose = rose_sk(sk); 929 int n; 930 931 if (peer != 0) { 932 if (sk->sk_state != TCP_ESTABLISHED) 933 return -ENOTCONN; 934 srose->srose_family = AF_ROSE; 935 srose->srose_addr = rose->dest_addr; 936 srose->srose_call = rose->dest_call; 937 srose->srose_ndigis = rose->dest_ndigis; 938 for (n = 0; n < rose->dest_ndigis; n++) 939 srose->srose_digis[n] = rose->dest_digis[n]; 940 } else { 941 srose->srose_family = AF_ROSE; 942 srose->srose_addr = rose->source_addr; 943 srose->srose_call = rose->source_call; 944 srose->srose_ndigis = rose->source_ndigis; 945 for (n = 0; n < rose->source_ndigis; n++) 946 srose->srose_digis[n] = rose->source_digis[n]; 947 } 948 949 *uaddr_len = sizeof(struct full_sockaddr_rose); 950 return 0; 951} 952 953int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci) 954{ 955 struct sock *sk; 956 struct sock *make; 957 struct rose_sock *make_rose; 958 struct rose_facilities_struct facilities; 959 int n, len; 960 961 skb->sk = NULL; /* Initially we don't know who it's for */ 962 963 /* 964 * skb->data points to the rose frame start 965 */ 966 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct)); 967 968 len = (((skb->data[3] >> 4) & 0x0F) + 1) / 2; 969 len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2; 970 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) { 971 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76); 972 return 0; 973 } 974 975 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call); 976 977 /* 978 * We can't accept the Call Request. 979 */ 980 if (sk == NULL || sk_acceptq_is_full(sk) || 981 (make = rose_make_new(sk)) == NULL) { 982 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120); 983 return 0; 984 } 985 986 skb->sk = make; 987 make->sk_state = TCP_ESTABLISHED; 988 make_rose = rose_sk(make); 989 990 make_rose->lci = lci; 991 make_rose->dest_addr = facilities.dest_addr; 992 make_rose->dest_call = facilities.dest_call; 993 make_rose->dest_ndigis = facilities.dest_ndigis; 994 for (n = 0 ; n < facilities.dest_ndigis ; n++) 995 make_rose->dest_digis[n] = facilities.dest_digis[n]; 996 make_rose->source_addr = facilities.source_addr; 997 make_rose->source_call = facilities.source_call; 998 make_rose->source_ndigis = facilities.source_ndigis; 999 for (n = 0 ; n < facilities.source_ndigis ; n++) 1000 make_rose->source_digis[n]= facilities.source_digis[n]; 1001 make_rose->neighbour = neigh; 1002 make_rose->device = dev; 1003 make_rose->facilities = facilities; 1004 1005 make_rose->neighbour->use++; 1006 1007 if (rose_sk(sk)->defer) { 1008 make_rose->state = ROSE_STATE_5; 1009 } else { 1010 rose_write_internal(make, ROSE_CALL_ACCEPTED); 1011 make_rose->state = ROSE_STATE_3; 1012 rose_start_idletimer(make); 1013 } 1014 1015 make_rose->condition = 0x00; 1016 make_rose->vs = 0; 1017 make_rose->va = 0; 1018 make_rose->vr = 0; 1019 make_rose->vl = 0; 1020 sk->sk_ack_backlog++; 1021 1022 rose_insert_socket(make); 1023 1024 skb_queue_head(&sk->sk_receive_queue, skb); 1025 1026 rose_start_heartbeat(make); 1027 1028 if (!sock_flag(sk, SOCK_DEAD)) 1029 sk->sk_data_ready(sk, skb->len); 1030 1031 return 1; 1032} 1033 1034static int rose_sendmsg(struct kiocb *iocb, struct socket *sock, 1035 struct msghdr *msg, size_t len) 1036{ 1037 struct sock *sk = sock->sk; 1038 struct rose_sock *rose = rose_sk(sk); 1039 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name; 1040 int err; 1041 struct full_sockaddr_rose srose; 1042 struct sk_buff *skb; 1043 unsigned char *asmptr; 1044 int n, size, qbit = 0; 1045 1046 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) 1047 return -EINVAL; 1048 1049 if (sock_flag(sk, SOCK_ZAPPED)) 1050 return -EADDRNOTAVAIL; 1051 1052 if (sk->sk_shutdown & SEND_SHUTDOWN) { 1053 send_sig(SIGPIPE, current, 0); 1054 return -EPIPE; 1055 } 1056 1057 if (rose->neighbour == NULL || rose->device == NULL) 1058 return -ENETUNREACH; 1059 1060 if (usrose != NULL) { 1061 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose)) 1062 return -EINVAL; 1063 memset(&srose, 0, sizeof(struct full_sockaddr_rose)); 1064 memcpy(&srose, usrose, msg->msg_namelen); 1065 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 || 1066 ax25cmp(&rose->dest_call, &srose.srose_call) != 0) 1067 return -EISCONN; 1068 if (srose.srose_ndigis != rose->dest_ndigis) 1069 return -EISCONN; 1070 if (srose.srose_ndigis == rose->dest_ndigis) { 1071 for (n = 0 ; n < srose.srose_ndigis ; n++) 1072 if (ax25cmp(&rose->dest_digis[n], 1073 &srose.srose_digis[n])) 1074 return -EISCONN; 1075 } 1076 if (srose.srose_family != AF_ROSE) 1077 return -EINVAL; 1078 } else { 1079 if (sk->sk_state != TCP_ESTABLISHED) 1080 return -ENOTCONN; 1081 1082 srose.srose_family = AF_ROSE; 1083 srose.srose_addr = rose->dest_addr; 1084 srose.srose_call = rose->dest_call; 1085 srose.srose_ndigis = rose->dest_ndigis; 1086 for (n = 0 ; n < rose->dest_ndigis ; n++) 1087 srose.srose_digis[n] = rose->dest_digis[n]; 1088 } 1089 1090 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n"); 1091 1092 /* Build a packet */ 1093 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n"); 1094 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN; 1095 1096 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) 1097 return err; 1098 1099 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN); 1100 1101 /* 1102 * Put the data on the end 1103 */ 1104 SOCK_DEBUG(sk, "ROSE: Appending user data\n"); 1105 1106 skb_reset_transport_header(skb); 1107 skb_put(skb, len); 1108 1109 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len); 1110 if (err) { 1111 kfree_skb(skb); 1112 return err; 1113 } 1114 1115 /* 1116 * If the Q BIT Include socket option is in force, the first 1117 * byte of the user data is the logical value of the Q Bit. 1118 */ 1119 if (rose->qbitincl) { 1120 qbit = skb->data[0]; 1121 skb_pull(skb, 1); 1122 } 1123 1124 /* 1125 * Push down the ROSE header 1126 */ 1127 asmptr = skb_push(skb, ROSE_MIN_LEN); 1128 1129 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n"); 1130 1131 /* Build a ROSE Network header */ 1132 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI; 1133 asmptr[1] = (rose->lci >> 0) & 0xFF; 1134 asmptr[2] = ROSE_DATA; 1135 1136 if (qbit) 1137 asmptr[0] |= ROSE_Q_BIT; 1138 1139 SOCK_DEBUG(sk, "ROSE: Built header.\n"); 1140 1141 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n"); 1142 1143 if (sk->sk_state != TCP_ESTABLISHED) { 1144 kfree_skb(skb); 1145 return -ENOTCONN; 1146 } 1147 1148#ifdef M_BIT 1149#define ROSE_PACLEN (256-ROSE_MIN_LEN) 1150 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) { 1151 unsigned char header[ROSE_MIN_LEN]; 1152 struct sk_buff *skbn; 1153 int frontlen; 1154 int lg; 1155 1156 /* Save a copy of the Header */ 1157 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN); 1158 skb_pull(skb, ROSE_MIN_LEN); 1159 1160 frontlen = skb_headroom(skb); 1161 1162 while (skb->len > 0) { 1163 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) { 1164 kfree_skb(skb); 1165 return err; 1166 } 1167 1168 skbn->sk = sk; 1169 skbn->free = 1; 1170 skbn->arp = 1; 1171 1172 skb_reserve(skbn, frontlen); 1173 1174 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN; 1175 1176 /* Copy the user data */ 1177 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg); 1178 skb_pull(skb, lg); 1179 1180 /* Duplicate the Header */ 1181 skb_push(skbn, ROSE_MIN_LEN); 1182 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN); 1183 1184 if (skb->len > 0) 1185 skbn->data[2] |= M_BIT; 1186 1187 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */ 1188 } 1189 1190 skb->free = 1; 1191 kfree_skb(skb); 1192 } else { 1193 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */ 1194 } 1195#else 1196 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */ 1197#endif 1198 1199 rose_kick(sk); 1200 1201 return len; 1202} 1203 1204 1205static int rose_recvmsg(struct kiocb *iocb, struct socket *sock, 1206 struct msghdr *msg, size_t size, int flags) 1207{ 1208 struct sock *sk = sock->sk; 1209 struct rose_sock *rose = rose_sk(sk); 1210 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name; 1211 size_t copied; 1212 unsigned char *asmptr; 1213 struct sk_buff *skb; 1214 int n, er, qbit; 1215 1216 /* 1217 * This works for seqpacket too. The receiver has ordered the queue for 1218 * us! We do one quick check first though 1219 */ 1220 if (sk->sk_state != TCP_ESTABLISHED) 1221 return -ENOTCONN; 1222 1223 /* Now we can treat all alike */ 1224 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) 1225 return er; 1226 1227 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT; 1228 1229 skb_pull(skb, ROSE_MIN_LEN); 1230 1231 if (rose->qbitincl) { 1232 asmptr = skb_push(skb, 1); 1233 *asmptr = qbit; 1234 } 1235 1236 skb_reset_transport_header(skb); 1237 copied = skb->len; 1238 1239 if (copied > size) { 1240 copied = size; 1241 msg->msg_flags |= MSG_TRUNC; 1242 } 1243 1244 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 1245 1246 if (srose != NULL) { 1247 srose->srose_family = AF_ROSE; 1248 srose->srose_addr = rose->dest_addr; 1249 srose->srose_call = rose->dest_call; 1250 srose->srose_ndigis = rose->dest_ndigis; 1251 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) { 1252 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name; 1253 for (n = 0 ; n < rose->dest_ndigis ; n++) 1254 full_srose->srose_digis[n] = rose->dest_digis[n]; 1255 msg->msg_namelen = sizeof(struct full_sockaddr_rose); 1256 } else { 1257 if (rose->dest_ndigis >= 1) { 1258 srose->srose_ndigis = 1; 1259 srose->srose_digi = rose->dest_digis[0]; 1260 } 1261 msg->msg_namelen = sizeof(struct sockaddr_rose); 1262 } 1263 } 1264 1265 skb_free_datagram(sk, skb); 1266 1267 return copied; 1268} 1269 1270 1271static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1272{ 1273 struct sock *sk = sock->sk; 1274 struct rose_sock *rose = rose_sk(sk); 1275 void __user *argp = (void __user *)arg; 1276 1277 switch (cmd) { 1278 case TIOCOUTQ: { 1279 long amount; 1280 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); 1281 if (amount < 0) 1282 amount = 0; 1283 return put_user(amount, (unsigned int __user *) argp); 1284 } 1285 1286 case TIOCINQ: { 1287 struct sk_buff *skb; 1288 long amount = 0L; 1289 /* These two are safe on a single CPU system as only user tasks fiddle here */ 1290 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) 1291 amount = skb->len; 1292 return put_user(amount, (unsigned int __user *) argp); 1293 } 1294 1295 case SIOCGSTAMP: 1296 return sock_get_timestamp(sk, (struct timeval __user *) argp); 1297 1298 case SIOCGSTAMPNS: 1299 return sock_get_timestampns(sk, (struct timespec __user *) argp); 1300 1301 case SIOCGIFADDR: 1302 case SIOCSIFADDR: 1303 case SIOCGIFDSTADDR: 1304 case SIOCSIFDSTADDR: 1305 case SIOCGIFBRDADDR: 1306 case SIOCSIFBRDADDR: 1307 case SIOCGIFNETMASK: 1308 case SIOCSIFNETMASK: 1309 case SIOCGIFMETRIC: 1310 case SIOCSIFMETRIC: 1311 return -EINVAL; 1312 1313 case SIOCADDRT: 1314 case SIOCDELRT: 1315 case SIOCRSCLRRT: 1316 if (!capable(CAP_NET_ADMIN)) 1317 return -EPERM; 1318 return rose_rt_ioctl(cmd, argp); 1319 1320 case SIOCRSGCAUSE: { 1321 struct rose_cause_struct rose_cause; 1322 rose_cause.cause = rose->cause; 1323 rose_cause.diagnostic = rose->diagnostic; 1324 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0; 1325 } 1326 1327 case SIOCRSSCAUSE: { 1328 struct rose_cause_struct rose_cause; 1329 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct))) 1330 return -EFAULT; 1331 rose->cause = rose_cause.cause; 1332 rose->diagnostic = rose_cause.diagnostic; 1333 return 0; 1334 } 1335 1336 case SIOCRSSL2CALL: 1337 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1338 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1339 ax25_listen_release(&rose_callsign, NULL); 1340 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address))) 1341 return -EFAULT; 1342 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1343 return ax25_listen_register(&rose_callsign, NULL); 1344 1345 return 0; 1346 1347 case SIOCRSGL2CALL: 1348 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0; 1349 1350 case SIOCRSACCEPT: 1351 if (rose->state == ROSE_STATE_5) { 1352 rose_write_internal(sk, ROSE_CALL_ACCEPTED); 1353 rose_start_idletimer(sk); 1354 rose->condition = 0x00; 1355 rose->vs = 0; 1356 rose->va = 0; 1357 rose->vr = 0; 1358 rose->vl = 0; 1359 rose->state = ROSE_STATE_3; 1360 } 1361 return 0; 1362 1363 default: 1364 return -ENOIOCTLCMD; 1365 } 1366 1367 return 0; 1368} 1369 1370#ifdef CONFIG_PROC_FS 1371static void *rose_info_start(struct seq_file *seq, loff_t *pos) 1372{ 1373 int i; 1374 struct sock *s; 1375 struct hlist_node *node; 1376 1377 spin_lock_bh(&rose_list_lock); 1378 if (*pos == 0) 1379 return SEQ_START_TOKEN; 1380 1381 i = 1; 1382 sk_for_each(s, node, &rose_list) { 1383 if (i == *pos) 1384 return s; 1385 ++i; 1386 } 1387 return NULL; 1388} 1389 1390static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos) 1391{ 1392 ++*pos; 1393 1394 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list) 1395 : sk_next((struct sock *)v); 1396} 1397 1398static void rose_info_stop(struct seq_file *seq, void *v) 1399{ 1400 spin_unlock_bh(&rose_list_lock); 1401} 1402 1403static int rose_info_show(struct seq_file *seq, void *v) 1404{ 1405 char buf[11]; 1406 1407 if (v == SEQ_START_TOKEN) 1408 seq_puts(seq, 1409 "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"); 1410 1411 else { 1412 struct sock *s = v; 1413 struct rose_sock *rose = rose_sk(s); 1414 const char *devname, *callsign; 1415 const struct net_device *dev = rose->device; 1416 1417 if (!dev) 1418 devname = "???"; 1419 else 1420 devname = dev->name; 1421 1422 seq_printf(seq, "%-10s %-9s ", 1423 rose2asc(&rose->dest_addr), 1424 ax2asc(buf, &rose->dest_call)); 1425 1426 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0) 1427 callsign = "??????-?"; 1428 else 1429 callsign = ax2asc(buf, &rose->source_call); 1430 1431 seq_printf(seq, 1432 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n", 1433 rose2asc(&rose->source_addr), 1434 callsign, 1435 devname, 1436 rose->lci & 0x0FFF, 1437 (rose->neighbour) ? rose->neighbour->number : 0, 1438 rose->state, 1439 rose->vs, 1440 rose->vr, 1441 rose->va, 1442 ax25_display_timer(&rose->timer) / HZ, 1443 rose->t1 / HZ, 1444 rose->t2 / HZ, 1445 rose->t3 / HZ, 1446 rose->hb / HZ, 1447 ax25_display_timer(&rose->idletimer) / (60 * HZ), 1448 rose->idle / (60 * HZ), 1449 atomic_read(&s->sk_wmem_alloc), 1450 atomic_read(&s->sk_rmem_alloc), 1451 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); 1452 } 1453 1454 return 0; 1455} 1456 1457static struct seq_operations rose_info_seqops = { 1458 .start = rose_info_start, 1459 .next = rose_info_next, 1460 .stop = rose_info_stop, 1461 .show = rose_info_show, 1462}; 1463 1464static int rose_info_open(struct inode *inode, struct file *file) 1465{ 1466 return seq_open(file, &rose_info_seqops); 1467} 1468 1469static const struct file_operations rose_info_fops = { 1470 .owner = THIS_MODULE, 1471 .open = rose_info_open, 1472 .read = seq_read, 1473 .llseek = seq_lseek, 1474 .release = seq_release, 1475}; 1476#endif /* CONFIG_PROC_FS */ 1477 1478static struct net_proto_family rose_family_ops = { 1479 .family = PF_ROSE, 1480 .create = rose_create, 1481 .owner = THIS_MODULE, 1482}; 1483 1484static struct proto_ops rose_proto_ops = { 1485 .family = PF_ROSE, 1486 .owner = THIS_MODULE, 1487 .release = rose_release, 1488 .bind = rose_bind, 1489 .connect = rose_connect, 1490 .socketpair = sock_no_socketpair, 1491 .accept = rose_accept, 1492 .getname = rose_getname, 1493 .poll = datagram_poll, 1494 .ioctl = rose_ioctl, 1495 .listen = rose_listen, 1496 .shutdown = sock_no_shutdown, 1497 .setsockopt = rose_setsockopt, 1498 .getsockopt = rose_getsockopt, 1499 .sendmsg = rose_sendmsg, 1500 .recvmsg = rose_recvmsg, 1501 .mmap = sock_no_mmap, 1502 .sendpage = sock_no_sendpage, 1503}; 1504 1505static struct notifier_block rose_dev_notifier = { 1506 .notifier_call = rose_device_event, 1507}; 1508 1509static struct net_device **dev_rose; 1510 1511static struct ax25_protocol rose_pid = { 1512 .pid = AX25_P_ROSE, 1513 .func = rose_route_frame 1514}; 1515 1516static struct ax25_linkfail rose_linkfail_notifier = { 1517 .func = rose_link_failed 1518}; 1519 1520static int __init rose_proto_init(void) 1521{ 1522 int i; 1523 int rc; 1524 1525 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) { 1526 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n"); 1527 rc = -EINVAL; 1528 goto out; 1529 } 1530 1531 rc = proto_register(&rose_proto, 0); 1532 if (rc != 0) 1533 goto out; 1534 1535 rose_callsign = null_ax25_address; 1536 1537 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL); 1538 if (dev_rose == NULL) { 1539 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n"); 1540 rc = -ENOMEM; 1541 goto out_proto_unregister; 1542 } 1543 1544 for (i = 0; i < rose_ndevs; i++) { 1545 struct net_device *dev; 1546 char name[IFNAMSIZ]; 1547 1548 sprintf(name, "rose%d", i); 1549 dev = alloc_netdev(sizeof(struct net_device_stats), 1550 name, rose_setup); 1551 if (!dev) { 1552 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n"); 1553 rc = -ENOMEM; 1554 goto fail; 1555 } 1556 rc = register_netdev(dev); 1557 if (rc) { 1558 printk(KERN_ERR "ROSE: netdevice registration failed\n"); 1559 free_netdev(dev); 1560 goto fail; 1561 } 1562 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key); 1563 dev_rose[i] = dev; 1564 } 1565 1566 sock_register(&rose_family_ops); 1567 register_netdevice_notifier(&rose_dev_notifier); 1568 1569 ax25_register_pid(&rose_pid); 1570 ax25_linkfail_register(&rose_linkfail_notifier); 1571 1572#ifdef CONFIG_SYSCTL 1573 rose_register_sysctl(); 1574#endif 1575 rose_loopback_init(); 1576 1577 rose_add_loopback_neigh(); 1578 1579 proc_net_fops_create("rose", S_IRUGO, &rose_info_fops); 1580 proc_net_fops_create("rose_neigh", S_IRUGO, &rose_neigh_fops); 1581 proc_net_fops_create("rose_nodes", S_IRUGO, &rose_nodes_fops); 1582 proc_net_fops_create("rose_routes", S_IRUGO, &rose_routes_fops); 1583out: 1584 return rc; 1585fail: 1586 while (--i >= 0) { 1587 unregister_netdev(dev_rose[i]); 1588 free_netdev(dev_rose[i]); 1589 } 1590 kfree(dev_rose); 1591out_proto_unregister: 1592 proto_unregister(&rose_proto); 1593 goto out; 1594} 1595module_init(rose_proto_init); 1596 1597module_param(rose_ndevs, int, 0); 1598MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices"); 1599 1600MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); 1601MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol"); 1602MODULE_LICENSE("GPL"); 1603MODULE_ALIAS_NETPROTO(PF_ROSE); 1604 1605static void __exit rose_exit(void) 1606{ 1607 int i; 1608 1609 proc_net_remove("rose"); 1610 proc_net_remove("rose_neigh"); 1611 proc_net_remove("rose_nodes"); 1612 proc_net_remove("rose_routes"); 1613 rose_loopback_clear(); 1614 1615 rose_rt_free(); 1616 1617 ax25_protocol_release(AX25_P_ROSE); 1618 ax25_linkfail_release(&rose_linkfail_notifier); 1619 1620 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1621 ax25_listen_release(&rose_callsign, NULL); 1622 1623#ifdef CONFIG_SYSCTL 1624 rose_unregister_sysctl(); 1625#endif 1626 unregister_netdevice_notifier(&rose_dev_notifier); 1627 1628 sock_unregister(PF_ROSE); 1629 1630 for (i = 0; i < rose_ndevs; i++) { 1631 struct net_device *dev = dev_rose[i]; 1632 1633 if (dev) { 1634 unregister_netdev(dev); 1635 free_netdev(dev); 1636 } 1637 } 1638 1639 kfree(dev_rose); 1640 proto_unregister(&rose_proto); 1641} 1642 1643module_exit(rose_exit); 1644