1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License as published by 4 * the Free Software Foundation; either version 2 of the License, or 5 * (at your option) any later version. 6 * 7 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) 8 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk) 9 * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net) 10 * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi) 11 */ 12 13 #include <linux/capability.h> 14 #include <linux/module.h> 15 #include <linux/moduleparam.h> 16 #include <linux/init.h> 17 #include <linux/errno.h> 18 #include <linux/types.h> 19 #include <linux/socket.h> 20 #include <linux/in.h> 21 #include <linux/kernel.h> 22 #include <linux/sched.h> 23 #include <linux/spinlock.h> 24 #include <linux/timer.h> 25 #include <linux/string.h> 26 #include <linux/sockios.h> 27 #include <linux/net.h> 28 #include <linux/stat.h> 29 #include <net/net_namespace.h> 30 #include <net/ax25.h> 31 #include <linux/inet.h> 32 #include <linux/netdevice.h> 33 #include <linux/if_arp.h> 34 #include <linux/skbuff.h> 35 #include <net/sock.h> 36 #include <asm/system.h> 37 #include <asm/uaccess.h> 38 #include <linux/fcntl.h> 39 #include <linux/termios.h> 40 #include <linux/mm.h> 41 #include <linux/interrupt.h> 42 #include <linux/notifier.h> 43 #include <net/rose.h> 44 #include <linux/proc_fs.h> 45 #include <linux/seq_file.h> 46 #include <net/tcp_states.h> 47 #include <net/ip.h> 48 #include <net/arp.h> 49 50 static int rose_ndevs = 10; 51 52 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0; 53 int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1; 54 int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2; 55 int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3; 56 int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE; 57 int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB; 58 int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING; 59 int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT; 60 int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC; 61 int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE; 62 63 static HLIST_HEAD(rose_list); 64 static DEFINE_SPINLOCK(rose_list_lock); 65 66 static 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 struct hlist_node *node; 169 170 spin_lock_bh(&rose_list_lock); 171 sk_for_each(s, node, &rose_list) { 172 struct rose_sock *rose = rose_sk(s); 173 174 if (rose->neighbour == neigh) { 175 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); 176 rose->neighbour->use--; 177 rose->neighbour = NULL; 178 } 179 } 180 spin_unlock_bh(&rose_list_lock); 181 } 182 183 /* 184 * Kill all bound sockets on a dropped device. 185 */ 186 static void rose_kill_by_device(struct net_device *dev) 187 { 188 struct sock *s; 189 struct hlist_node *node; 190 191 spin_lock_bh(&rose_list_lock); 192 sk_for_each(s, node, &rose_list) { 193 struct rose_sock *rose = rose_sk(s); 194 195 if (rose->device == dev) { 196 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); 197 rose->neighbour->use--; 198 rose->device = NULL; 199 } 200 } 201 spin_unlock_bh(&rose_list_lock); 202 } 203 204 /* 205 * Handle device status changes. 206 */ 207 static int rose_device_event(struct notifier_block *this, unsigned long event, 208 void *ptr) 209 { 210 struct net_device *dev = (struct net_device *)ptr; 211 212 if (!net_eq(dev_net(dev), &init_net)) 213 return NOTIFY_DONE; 214 215 if (event != NETDEV_DOWN) 216 return NOTIFY_DONE; 217 218 switch (dev->type) { 219 case ARPHRD_ROSE: 220 rose_kill_by_device(dev); 221 break; 222 case ARPHRD_AX25: 223 rose_link_device_down(dev); 224 rose_rt_device_down(dev); 225 break; 226 } 227 228 return NOTIFY_DONE; 229 } 230 231 /* 232 * Add a socket to the bound sockets list. 233 */ 234 static void rose_insert_socket(struct sock *sk) 235 { 236 237 spin_lock_bh(&rose_list_lock); 238 sk_add_node(sk, &rose_list); 239 spin_unlock_bh(&rose_list_lock); 240 } 241 242 /* 243 * Find a socket that wants to accept the Call Request we just 244 * received. 245 */ 246 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call) 247 { 248 struct sock *s; 249 struct hlist_node *node; 250 251 spin_lock_bh(&rose_list_lock); 252 sk_for_each(s, node, &rose_list) { 253 struct rose_sock *rose = rose_sk(s); 254 255 if (!rosecmp(&rose->source_addr, addr) && 256 !ax25cmp(&rose->source_call, call) && 257 !rose->source_ndigis && s->sk_state == TCP_LISTEN) 258 goto found; 259 } 260 261 sk_for_each(s, node, &rose_list) { 262 struct rose_sock *rose = rose_sk(s); 263 264 if (!rosecmp(&rose->source_addr, addr) && 265 !ax25cmp(&rose->source_call, &null_ax25_address) && 266 s->sk_state == TCP_LISTEN) 267 goto found; 268 } 269 s = NULL; 270 found: 271 spin_unlock_bh(&rose_list_lock); 272 return s; 273 } 274 275 /* 276 * Find a connected ROSE socket given my LCI and device. 277 */ 278 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh) 279 { 280 struct sock *s; 281 struct hlist_node *node; 282 283 spin_lock_bh(&rose_list_lock); 284 sk_for_each(s, node, &rose_list) { 285 struct rose_sock *rose = rose_sk(s); 286 287 if (rose->lci == lci && rose->neighbour == neigh) 288 goto found; 289 } 290 s = NULL; 291 found: 292 spin_unlock_bh(&rose_list_lock); 293 return s; 294 } 295 296 /* 297 * Find a unique LCI for a given device. 298 */ 299 unsigned int rose_new_lci(struct rose_neigh *neigh) 300 { 301 int lci; 302 303 if (neigh->dce_mode) { 304 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++) 305 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) 306 return lci; 307 } else { 308 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--) 309 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) 310 return lci; 311 } 312 313 return 0; 314 } 315 316 /* 317 * Deferred destroy. 318 */ 319 void rose_destroy_socket(struct sock *); 320 321 /* 322 * Handler for deferred kills. 323 */ 324 static void rose_destroy_timer(unsigned long data) 325 { 326 rose_destroy_socket((struct sock *)data); 327 } 328 329 /* 330 * This is called from user mode and the timers. Thus it protects itself 331 * against interrupt users but doesn't worry about being called during 332 * work. Once it is removed from the queue no interrupt or bottom half 333 * will touch it and we are (fairly 8-) ) safe. 334 */ 335 void rose_destroy_socket(struct sock *sk) 336 { 337 struct sk_buff *skb; 338 339 rose_remove_socket(sk); 340 rose_stop_heartbeat(sk); 341 rose_stop_idletimer(sk); 342 rose_stop_timer(sk); 343 344 rose_clear_queues(sk); /* Flush the queues */ 345 346 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { 347 if (skb->sk != sk) { /* A pending connection */ 348 /* Queue the unaccepted socket for death */ 349 sock_set_flag(skb->sk, SOCK_DEAD); 350 rose_start_heartbeat(skb->sk); 351 rose_sk(skb->sk)->state = ROSE_STATE_0; 352 } 353 354 kfree_skb(skb); 355 } 356 357 if (sk_has_allocations(sk)) { 358 /* Defer: outstanding buffers */ 359 setup_timer(&sk->sk_timer, rose_destroy_timer, 360 (unsigned long)sk); 361 sk->sk_timer.expires = jiffies + 10 * HZ; 362 add_timer(&sk->sk_timer); 363 } else 364 sock_put(sk); 365 } 366 367 /* 368 * Handling for system calls applied via the various interfaces to a 369 * ROSE socket object. 370 */ 371 372 static int rose_setsockopt(struct socket *sock, int level, int optname, 373 char __user *optval, unsigned int optlen) 374 { 375 struct sock *sk = sock->sk; 376 struct rose_sock *rose = rose_sk(sk); 377 int opt; 378 379 if (level != SOL_ROSE) 380 return -ENOPROTOOPT; 381 382 if (optlen < sizeof(int)) 383 return -EINVAL; 384 385 if (get_user(opt, (int __user *)optval)) 386 return -EFAULT; 387 388 switch (optname) { 389 case ROSE_DEFER: 390 rose->defer = opt ? 1 : 0; 391 return 0; 392 393 case ROSE_T1: 394 if (opt < 1) 395 return -EINVAL; 396 rose->t1 = opt * HZ; 397 return 0; 398 399 case ROSE_T2: 400 if (opt < 1) 401 return -EINVAL; 402 rose->t2 = opt * HZ; 403 return 0; 404 405 case ROSE_T3: 406 if (opt < 1) 407 return -EINVAL; 408 rose->t3 = opt * HZ; 409 return 0; 410 411 case ROSE_HOLDBACK: 412 if (opt < 1) 413 return -EINVAL; 414 rose->hb = opt * HZ; 415 return 0; 416 417 case ROSE_IDLE: 418 if (opt < 0) 419 return -EINVAL; 420 rose->idle = opt * 60 * HZ; 421 return 0; 422 423 case ROSE_QBITINCL: 424 rose->qbitincl = opt ? 1 : 0; 425 return 0; 426 427 default: 428 return -ENOPROTOOPT; 429 } 430 } 431 432 static int rose_getsockopt(struct socket *sock, int level, int optname, 433 char __user *optval, int __user *optlen) 434 { 435 struct sock *sk = sock->sk; 436 struct rose_sock *rose = rose_sk(sk); 437 int val = 0; 438 int len; 439 440 if (level != SOL_ROSE) 441 return -ENOPROTOOPT; 442 443 if (get_user(len, optlen)) 444 return -EFAULT; 445 446 if (len < 0) 447 return -EINVAL; 448 449 switch (optname) { 450 case ROSE_DEFER: 451 val = rose->defer; 452 break; 453 454 case ROSE_T1: 455 val = rose->t1 / HZ; 456 break; 457 458 case ROSE_T2: 459 val = rose->t2 / HZ; 460 break; 461 462 case ROSE_T3: 463 val = rose->t3 / HZ; 464 break; 465 466 case ROSE_HOLDBACK: 467 val = rose->hb / HZ; 468 break; 469 470 case ROSE_IDLE: 471 val = rose->idle / (60 * HZ); 472 break; 473 474 case ROSE_QBITINCL: 475 val = rose->qbitincl; 476 break; 477 478 default: 479 return -ENOPROTOOPT; 480 } 481 482 len = min_t(unsigned int, len, sizeof(int)); 483 484 if (put_user(len, optlen)) 485 return -EFAULT; 486 487 return copy_to_user(optval, &val, len) ? -EFAULT : 0; 488 } 489 490 static int rose_listen(struct socket *sock, int backlog) 491 { 492 struct sock *sk = sock->sk; 493 494 if (sk->sk_state != TCP_LISTEN) { 495 struct rose_sock *rose = rose_sk(sk); 496 497 rose->dest_ndigis = 0; 498 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN); 499 memset(&rose->dest_call, 0, AX25_ADDR_LEN); 500 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS); 501 sk->sk_max_ack_backlog = backlog; 502 sk->sk_state = TCP_LISTEN; 503 return 0; 504 } 505 506 return -EOPNOTSUPP; 507 } 508 509 static struct proto rose_proto = { 510 .name = "ROSE", 511 .owner = THIS_MODULE, 512 .obj_size = sizeof(struct rose_sock), 513 }; 514 515 static int rose_create(struct net *net, struct socket *sock, int protocol) 516 { 517 struct sock *sk; 518 struct rose_sock *rose; 519 520 if (net != &init_net) 521 return -EAFNOSUPPORT; 522 523 if (sock->type != SOCK_SEQPACKET || protocol != 0) 524 return -ESOCKTNOSUPPORT; 525 526 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto); 527 if (sk == NULL) 528 return -ENOMEM; 529 530 rose = rose_sk(sk); 531 532 sock_init_data(sock, sk); 533 534 skb_queue_head_init(&rose->ack_queue); 535 #ifdef M_BIT 536 skb_queue_head_init(&rose->frag_queue); 537 rose->fraglen = 0; 538 #endif 539 540 sock->ops = &rose_proto_ops; 541 sk->sk_protocol = protocol; 542 543 init_timer(&rose->timer); 544 init_timer(&rose->idletimer); 545 546 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout); 547 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout); 548 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout); 549 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout); 550 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout); 551 552 rose->state = ROSE_STATE_0; 553 554 return 0; 555 } 556 557 static struct sock *rose_make_new(struct sock *osk) 558 { 559 struct sock *sk; 560 struct rose_sock *rose, *orose; 561 562 if (osk->sk_type != SOCK_SEQPACKET) 563 return NULL; 564 565 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto); 566 if (sk == NULL) 567 return NULL; 568 569 rose = rose_sk(sk); 570 571 sock_init_data(NULL, sk); 572 573 skb_queue_head_init(&rose->ack_queue); 574 #ifdef M_BIT 575 skb_queue_head_init(&rose->frag_queue); 576 rose->fraglen = 0; 577 #endif 578 579 sk->sk_type = osk->sk_type; 580 sk->sk_priority = osk->sk_priority; 581 sk->sk_protocol = osk->sk_protocol; 582 sk->sk_rcvbuf = osk->sk_rcvbuf; 583 sk->sk_sndbuf = osk->sk_sndbuf; 584 sk->sk_state = TCP_ESTABLISHED; 585 sock_copy_flags(sk, osk); 586 587 init_timer(&rose->timer); 588 init_timer(&rose->idletimer); 589 590 orose = rose_sk(osk); 591 rose->t1 = orose->t1; 592 rose->t2 = orose->t2; 593 rose->t3 = orose->t3; 594 rose->hb = orose->hb; 595 rose->idle = orose->idle; 596 rose->defer = orose->defer; 597 rose->device = orose->device; 598 rose->qbitincl = orose->qbitincl; 599 600 return sk; 601 } 602 603 static int rose_release(struct socket *sock) 604 { 605 struct sock *sk = sock->sk; 606 struct rose_sock *rose; 607 608 if (sk == NULL) return 0; 609 610 sock_hold(sk); 611 sock_orphan(sk); 612 lock_sock(sk); 613 rose = rose_sk(sk); 614 615 switch (rose->state) { 616 case ROSE_STATE_0: 617 release_sock(sk); 618 rose_disconnect(sk, 0, -1, -1); 619 lock_sock(sk); 620 rose_destroy_socket(sk); 621 break; 622 623 case ROSE_STATE_2: 624 rose->neighbour->use--; 625 release_sock(sk); 626 rose_disconnect(sk, 0, -1, -1); 627 lock_sock(sk); 628 rose_destroy_socket(sk); 629 break; 630 631 case ROSE_STATE_1: 632 case ROSE_STATE_3: 633 case ROSE_STATE_4: 634 case ROSE_STATE_5: 635 rose_clear_queues(sk); 636 rose_stop_idletimer(sk); 637 rose_write_internal(sk, ROSE_CLEAR_REQUEST); 638 rose_start_t3timer(sk); 639 rose->state = ROSE_STATE_2; 640 sk->sk_state = TCP_CLOSE; 641 sk->sk_shutdown |= SEND_SHUTDOWN; 642 sk->sk_state_change(sk); 643 sock_set_flag(sk, SOCK_DEAD); 644 sock_set_flag(sk, SOCK_DESTROY); 645 break; 646 647 default: 648 break; 649 } 650 651 sock->sk = NULL; 652 release_sock(sk); 653 sock_put(sk); 654 655 return 0; 656 } 657 658 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) 659 { 660 struct sock *sk = sock->sk; 661 struct rose_sock *rose = rose_sk(sk); 662 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; 663 struct net_device *dev; 664 ax25_address *source; 665 ax25_uid_assoc *user; 666 int n; 667 668 if (!sock_flag(sk, SOCK_ZAPPED)) 669 return -EINVAL; 670 671 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) 672 return -EINVAL; 673 674 if (addr->srose_family != AF_ROSE) 675 return -EINVAL; 676 677 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) 678 return -EINVAL; 679 680 if (addr->srose_ndigis > ROSE_MAX_DIGIS) 681 return -EINVAL; 682 683 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) { 684 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n"); 685 return -EADDRNOTAVAIL; 686 } 687 688 source = &addr->srose_call; 689 690 user = ax25_findbyuid(current_euid()); 691 if (user) { 692 rose->source_call = user->call; 693 ax25_uid_put(user); 694 } else { 695 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) 696 return -EACCES; 697 rose->source_call = *source; 698 } 699 700 rose->source_addr = addr->srose_addr; 701 rose->device = dev; 702 rose->source_ndigis = addr->srose_ndigis; 703 704 if (addr_len == sizeof(struct full_sockaddr_rose)) { 705 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; 706 for (n = 0 ; n < addr->srose_ndigis ; n++) 707 rose->source_digis[n] = full_addr->srose_digis[n]; 708 } else { 709 if (rose->source_ndigis == 1) { 710 rose->source_digis[0] = addr->srose_digi; 711 } 712 } 713 714 rose_insert_socket(sk); 715 716 sock_reset_flag(sk, SOCK_ZAPPED); 717 SOCK_DEBUG(sk, "ROSE: socket is bound\n"); 718 return 0; 719 } 720 721 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags) 722 { 723 struct sock *sk = sock->sk; 724 struct rose_sock *rose = rose_sk(sk); 725 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; 726 unsigned char cause, diagnostic; 727 struct net_device *dev; 728 ax25_uid_assoc *user; 729 int n, err = 0; 730 731 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) 732 return -EINVAL; 733 734 if (addr->srose_family != AF_ROSE) 735 return -EINVAL; 736 737 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) 738 return -EINVAL; 739 740 if (addr->srose_ndigis > ROSE_MAX_DIGIS) 741 return -EINVAL; 742 743 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */ 744 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS) 745 return -EINVAL; 746 747 lock_sock(sk); 748 749 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { 750 /* Connect completed during a ERESTARTSYS event */ 751 sock->state = SS_CONNECTED; 752 goto out_release; 753 } 754 755 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { 756 sock->state = SS_UNCONNECTED; 757 err = -ECONNREFUSED; 758 goto out_release; 759 } 760 761 if (sk->sk_state == TCP_ESTABLISHED) { 762 /* No reconnect on a seqpacket socket */ 763 err = -EISCONN; 764 goto out_release; 765 } 766 767 sk->sk_state = TCP_CLOSE; 768 sock->state = SS_UNCONNECTED; 769 770 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, 771 &diagnostic, 0); 772 if (!rose->neighbour) { 773 err = -ENETUNREACH; 774 goto out_release; 775 } 776 777 rose->lci = rose_new_lci(rose->neighbour); 778 if (!rose->lci) { 779 err = -ENETUNREACH; 780 goto out_release; 781 } 782 783 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ 784 sock_reset_flag(sk, SOCK_ZAPPED); 785 786 if ((dev = rose_dev_first()) == NULL) { 787 err = -ENETUNREACH; 788 goto out_release; 789 } 790 791 user = ax25_findbyuid(current_euid()); 792 if (!user) { 793 err = -EINVAL; 794 goto out_release; 795 } 796 797 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN); 798 rose->source_call = user->call; 799 rose->device = dev; 800 ax25_uid_put(user); 801 802 rose_insert_socket(sk); /* Finish the bind */ 803 } 804 rose_try_next_neigh: 805 rose->dest_addr = addr->srose_addr; 806 rose->dest_call = addr->srose_call; 807 rose->rand = ((long)rose & 0xFFFF) + rose->lci; 808 rose->dest_ndigis = addr->srose_ndigis; 809 810 if (addr_len == sizeof(struct full_sockaddr_rose)) { 811 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; 812 for (n = 0 ; n < addr->srose_ndigis ; n++) 813 rose->dest_digis[n] = full_addr->srose_digis[n]; 814 } else { 815 if (rose->dest_ndigis == 1) { 816 rose->dest_digis[0] = addr->srose_digi; 817 } 818 } 819 820 /* Move to connecting socket, start sending Connect Requests */ 821 sock->state = SS_CONNECTING; 822 sk->sk_state = TCP_SYN_SENT; 823 824 rose->state = ROSE_STATE_1; 825 826 rose->neighbour->use++; 827 828 rose_write_internal(sk, ROSE_CALL_REQUEST); 829 rose_start_heartbeat(sk); 830 rose_start_t1timer(sk); 831 832 /* Now the loop */ 833 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { 834 err = -EINPROGRESS; 835 goto out_release; 836 } 837 838 /* 839 * A Connect Ack with Choke or timeout or failed routing will go to 840 * closed. 841 */ 842 if (sk->sk_state == TCP_SYN_SENT) { 843 DEFINE_WAIT(wait); 844 845 for (;;) { 846 prepare_to_wait(sk->sk_sleep, &wait, 847 TASK_INTERRUPTIBLE); 848 if (sk->sk_state != TCP_SYN_SENT) 849 break; 850 if (!signal_pending(current)) { 851 release_sock(sk); 852 schedule(); 853 lock_sock(sk); 854 continue; 855 } 856 err = -ERESTARTSYS; 857 break; 858 } 859 finish_wait(sk->sk_sleep, &wait); 860 861 if (err) 862 goto out_release; 863 } 864 865 if (sk->sk_state != TCP_ESTABLISHED) { 866 /* Try next neighbour */ 867 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic, 0); 868 if (rose->neighbour) 869 goto rose_try_next_neigh; 870 871 /* No more neighbours */ 872 sock->state = SS_UNCONNECTED; 873 err = sock_error(sk); /* Always set at this point */ 874 goto out_release; 875 } 876 877 sock->state = SS_CONNECTED; 878 879 out_release: 880 release_sock(sk); 881 882 return err; 883 } 884 885 static int rose_accept(struct socket *sock, struct socket *newsock, int flags) 886 { 887 struct sk_buff *skb; 888 struct sock *newsk; 889 DEFINE_WAIT(wait); 890 struct sock *sk; 891 int err = 0; 892 893 if ((sk = sock->sk) == NULL) 894 return -EINVAL; 895 896 lock_sock(sk); 897 if (sk->sk_type != SOCK_SEQPACKET) { 898 err = -EOPNOTSUPP; 899 goto out_release; 900 } 901 902 if (sk->sk_state != TCP_LISTEN) { 903 err = -EINVAL; 904 goto out_release; 905 } 906 907 /* 908 * The write queue this time is holding sockets ready to use 909 * hooked into the SABM we saved 910 */ 911 for (;;) { 912 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); 913 914 skb = skb_dequeue(&sk->sk_receive_queue); 915 if (skb) 916 break; 917 918 if (flags & O_NONBLOCK) { 919 err = -EWOULDBLOCK; 920 break; 921 } 922 if (!signal_pending(current)) { 923 release_sock(sk); 924 schedule(); 925 lock_sock(sk); 926 continue; 927 } 928 err = -ERESTARTSYS; 929 break; 930 } 931 finish_wait(sk->sk_sleep, &wait); 932 if (err) 933 goto out_release; 934 935 newsk = skb->sk; 936 sock_graft(newsk, newsock); 937 938 /* Now attach up the new socket */ 939 skb->sk = NULL; 940 kfree_skb(skb); 941 sk->sk_ack_backlog--; 942 943 out_release: 944 release_sock(sk); 945 946 return err; 947 } 948 949 static int rose_getname(struct socket *sock, struct sockaddr *uaddr, 950 int *uaddr_len, int peer) 951 { 952 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr; 953 struct sock *sk = sock->sk; 954 struct rose_sock *rose = rose_sk(sk); 955 int n; 956 957 memset(srose, 0, sizeof(*srose)); 958 if (peer != 0) { 959 if (sk->sk_state != TCP_ESTABLISHED) 960 return -ENOTCONN; 961 srose->srose_family = AF_ROSE; 962 srose->srose_addr = rose->dest_addr; 963 srose->srose_call = rose->dest_call; 964 srose->srose_ndigis = rose->dest_ndigis; 965 for (n = 0; n < rose->dest_ndigis; n++) 966 srose->srose_digis[n] = rose->dest_digis[n]; 967 } else { 968 srose->srose_family = AF_ROSE; 969 srose->srose_addr = rose->source_addr; 970 srose->srose_call = rose->source_call; 971 srose->srose_ndigis = rose->source_ndigis; 972 for (n = 0; n < rose->source_ndigis; n++) 973 srose->srose_digis[n] = rose->source_digis[n]; 974 } 975 976 *uaddr_len = sizeof(struct full_sockaddr_rose); 977 return 0; 978 } 979 980 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci) 981 { 982 struct sock *sk; 983 struct sock *make; 984 struct rose_sock *make_rose; 985 struct rose_facilities_struct facilities; 986 int n, len; 987 988 skb->sk = NULL; /* Initially we don't know who it's for */ 989 990 /* 991 * skb->data points to the rose frame start 992 */ 993 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct)); 994 995 len = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1; 996 len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1; 997 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) { 998 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76); 999 return 0; 1000 } 1001 1002 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call); 1003 1004 /* 1005 * We can't accept the Call Request. 1006 */ 1007 if (sk == NULL || sk_acceptq_is_full(sk) || 1008 (make = rose_make_new(sk)) == NULL) { 1009 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120); 1010 return 0; 1011 } 1012 1013 skb->sk = make; 1014 make->sk_state = TCP_ESTABLISHED; 1015 make_rose = rose_sk(make); 1016 1017 make_rose->lci = lci; 1018 make_rose->dest_addr = facilities.dest_addr; 1019 make_rose->dest_call = facilities.dest_call; 1020 make_rose->dest_ndigis = facilities.dest_ndigis; 1021 for (n = 0 ; n < facilities.dest_ndigis ; n++) 1022 make_rose->dest_digis[n] = facilities.dest_digis[n]; 1023 make_rose->source_addr = facilities.source_addr; 1024 make_rose->source_call = facilities.source_call; 1025 make_rose->source_ndigis = facilities.source_ndigis; 1026 for (n = 0 ; n < facilities.source_ndigis ; n++) 1027 make_rose->source_digis[n]= facilities.source_digis[n]; 1028 make_rose->neighbour = neigh; 1029 make_rose->device = dev; 1030 make_rose->facilities = facilities; 1031 1032 make_rose->neighbour->use++; 1033 1034 if (rose_sk(sk)->defer) { 1035 make_rose->state = ROSE_STATE_5; 1036 } else { 1037 rose_write_internal(make, ROSE_CALL_ACCEPTED); 1038 make_rose->state = ROSE_STATE_3; 1039 rose_start_idletimer(make); 1040 } 1041 1042 make_rose->condition = 0x00; 1043 make_rose->vs = 0; 1044 make_rose->va = 0; 1045 make_rose->vr = 0; 1046 make_rose->vl = 0; 1047 sk->sk_ack_backlog++; 1048 1049 rose_insert_socket(make); 1050 1051 skb_queue_head(&sk->sk_receive_queue, skb); 1052 1053 rose_start_heartbeat(make); 1054 1055 if (!sock_flag(sk, SOCK_DEAD)) 1056 sk->sk_data_ready(sk, skb->len); 1057 1058 return 1; 1059 } 1060 1061 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock, 1062 struct msghdr *msg, size_t len) 1063 { 1064 struct sock *sk = sock->sk; 1065 struct rose_sock *rose = rose_sk(sk); 1066 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name; 1067 int err; 1068 struct full_sockaddr_rose srose; 1069 struct sk_buff *skb; 1070 unsigned char *asmptr; 1071 int n, size, qbit = 0; 1072 1073 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) 1074 return -EINVAL; 1075 1076 if (sock_flag(sk, SOCK_ZAPPED)) 1077 return -EADDRNOTAVAIL; 1078 1079 if (sk->sk_shutdown & SEND_SHUTDOWN) { 1080 send_sig(SIGPIPE, current, 0); 1081 return -EPIPE; 1082 } 1083 1084 if (rose->neighbour == NULL || rose->device == NULL) 1085 return -ENETUNREACH; 1086 1087 if (usrose != NULL) { 1088 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose)) 1089 return -EINVAL; 1090 memset(&srose, 0, sizeof(struct full_sockaddr_rose)); 1091 memcpy(&srose, usrose, msg->msg_namelen); 1092 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 || 1093 ax25cmp(&rose->dest_call, &srose.srose_call) != 0) 1094 return -EISCONN; 1095 if (srose.srose_ndigis != rose->dest_ndigis) 1096 return -EISCONN; 1097 if (srose.srose_ndigis == rose->dest_ndigis) { 1098 for (n = 0 ; n < srose.srose_ndigis ; n++) 1099 if (ax25cmp(&rose->dest_digis[n], 1100 &srose.srose_digis[n])) 1101 return -EISCONN; 1102 } 1103 if (srose.srose_family != AF_ROSE) 1104 return -EINVAL; 1105 } else { 1106 if (sk->sk_state != TCP_ESTABLISHED) 1107 return -ENOTCONN; 1108 1109 srose.srose_family = AF_ROSE; 1110 srose.srose_addr = rose->dest_addr; 1111 srose.srose_call = rose->dest_call; 1112 srose.srose_ndigis = rose->dest_ndigis; 1113 for (n = 0 ; n < rose->dest_ndigis ; n++) 1114 srose.srose_digis[n] = rose->dest_digis[n]; 1115 } 1116 1117 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n"); 1118 1119 /* Build a packet */ 1120 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n"); 1121 /* Sanity check the packet size */ 1122 if (len > 65535) 1123 return -EMSGSIZE; 1124 1125 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN; 1126 1127 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) 1128 return err; 1129 1130 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN); 1131 1132 /* 1133 * Put the data on the end 1134 */ 1135 SOCK_DEBUG(sk, "ROSE: Appending user data\n"); 1136 1137 skb_reset_transport_header(skb); 1138 skb_put(skb, len); 1139 1140 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len); 1141 if (err) { 1142 kfree_skb(skb); 1143 return err; 1144 } 1145 1146 /* 1147 * If the Q BIT Include socket option is in force, the first 1148 * byte of the user data is the logical value of the Q Bit. 1149 */ 1150 if (rose->qbitincl) { 1151 qbit = skb->data[0]; 1152 skb_pull(skb, 1); 1153 } 1154 1155 /* 1156 * Push down the ROSE header 1157 */ 1158 asmptr = skb_push(skb, ROSE_MIN_LEN); 1159 1160 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n"); 1161 1162 /* Build a ROSE Network header */ 1163 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI; 1164 asmptr[1] = (rose->lci >> 0) & 0xFF; 1165 asmptr[2] = ROSE_DATA; 1166 1167 if (qbit) 1168 asmptr[0] |= ROSE_Q_BIT; 1169 1170 SOCK_DEBUG(sk, "ROSE: Built header.\n"); 1171 1172 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n"); 1173 1174 if (sk->sk_state != TCP_ESTABLISHED) { 1175 kfree_skb(skb); 1176 return -ENOTCONN; 1177 } 1178 1179 #ifdef M_BIT 1180 #define ROSE_PACLEN (256-ROSE_MIN_LEN) 1181 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) { 1182 unsigned char header[ROSE_MIN_LEN]; 1183 struct sk_buff *skbn; 1184 int frontlen; 1185 int lg; 1186 1187 /* Save a copy of the Header */ 1188 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN); 1189 skb_pull(skb, ROSE_MIN_LEN); 1190 1191 frontlen = skb_headroom(skb); 1192 1193 while (skb->len > 0) { 1194 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) { 1195 kfree_skb(skb); 1196 return err; 1197 } 1198 1199 skbn->sk = sk; 1200 skbn->free = 1; 1201 skbn->arp = 1; 1202 1203 skb_reserve(skbn, frontlen); 1204 1205 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN; 1206 1207 /* Copy the user data */ 1208 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg); 1209 skb_pull(skb, lg); 1210 1211 /* Duplicate the Header */ 1212 skb_push(skbn, ROSE_MIN_LEN); 1213 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN); 1214 1215 if (skb->len > 0) 1216 skbn->data[2] |= M_BIT; 1217 1218 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */ 1219 } 1220 1221 skb->free = 1; 1222 kfree_skb(skb); 1223 } else { 1224 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */ 1225 } 1226 #else 1227 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */ 1228 #endif 1229 1230 rose_kick(sk); 1231 1232 return len; 1233 } 1234 1235 1236 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock, 1237 struct msghdr *msg, size_t size, int flags) 1238 { 1239 struct sock *sk = sock->sk; 1240 struct rose_sock *rose = rose_sk(sk); 1241 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name; 1242 size_t copied; 1243 unsigned char *asmptr; 1244 struct sk_buff *skb; 1245 int n, er, qbit; 1246 1247 /* 1248 * This works for seqpacket too. The receiver has ordered the queue for 1249 * us! We do one quick check first though 1250 */ 1251 if (sk->sk_state != TCP_ESTABLISHED) 1252 return -ENOTCONN; 1253 1254 /* Now we can treat all alike */ 1255 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) 1256 return er; 1257 1258 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT; 1259 1260 skb_pull(skb, ROSE_MIN_LEN); 1261 1262 if (rose->qbitincl) { 1263 asmptr = skb_push(skb, 1); 1264 *asmptr = qbit; 1265 } 1266 1267 skb_reset_transport_header(skb); 1268 copied = skb->len; 1269 1270 if (copied > size) { 1271 copied = size; 1272 msg->msg_flags |= MSG_TRUNC; 1273 } 1274 1275 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 1276 1277 if (srose != NULL) { 1278 srose->srose_family = AF_ROSE; 1279 srose->srose_addr = rose->dest_addr; 1280 srose->srose_call = rose->dest_call; 1281 srose->srose_ndigis = rose->dest_ndigis; 1282 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) { 1283 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name; 1284 for (n = 0 ; n < rose->dest_ndigis ; n++) 1285 full_srose->srose_digis[n] = rose->dest_digis[n]; 1286 msg->msg_namelen = sizeof(struct full_sockaddr_rose); 1287 } else { 1288 if (rose->dest_ndigis >= 1) { 1289 srose->srose_ndigis = 1; 1290 srose->srose_digi = rose->dest_digis[0]; 1291 } 1292 msg->msg_namelen = sizeof(struct sockaddr_rose); 1293 } 1294 } 1295 1296 skb_free_datagram(sk, skb); 1297 1298 return copied; 1299 } 1300 1301 1302 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1303 { 1304 struct sock *sk = sock->sk; 1305 struct rose_sock *rose = rose_sk(sk); 1306 void __user *argp = (void __user *)arg; 1307 1308 switch (cmd) { 1309 case TIOCOUTQ: { 1310 long amount; 1311 1312 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); 1313 if (amount < 0) 1314 amount = 0; 1315 return put_user(amount, (unsigned int __user *) argp); 1316 } 1317 1318 case TIOCINQ: { 1319 struct sk_buff *skb; 1320 long amount = 0L; 1321 /* These two are safe on a single CPU system as only user tasks fiddle here */ 1322 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) 1323 amount = skb->len; 1324 return put_user(amount, (unsigned int __user *) argp); 1325 } 1326 1327 case SIOCGSTAMP: 1328 return sock_get_timestamp(sk, (struct timeval __user *) argp); 1329 1330 case SIOCGSTAMPNS: 1331 return sock_get_timestampns(sk, (struct timespec __user *) argp); 1332 1333 case SIOCGIFADDR: 1334 case SIOCSIFADDR: 1335 case SIOCGIFDSTADDR: 1336 case SIOCSIFDSTADDR: 1337 case SIOCGIFBRDADDR: 1338 case SIOCSIFBRDADDR: 1339 case SIOCGIFNETMASK: 1340 case SIOCSIFNETMASK: 1341 case SIOCGIFMETRIC: 1342 case SIOCSIFMETRIC: 1343 return -EINVAL; 1344 1345 case SIOCADDRT: 1346 case SIOCDELRT: 1347 case SIOCRSCLRRT: 1348 if (!capable(CAP_NET_ADMIN)) 1349 return -EPERM; 1350 return rose_rt_ioctl(cmd, argp); 1351 1352 case SIOCRSGCAUSE: { 1353 struct rose_cause_struct rose_cause; 1354 rose_cause.cause = rose->cause; 1355 rose_cause.diagnostic = rose->diagnostic; 1356 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0; 1357 } 1358 1359 case SIOCRSSCAUSE: { 1360 struct rose_cause_struct rose_cause; 1361 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct))) 1362 return -EFAULT; 1363 rose->cause = rose_cause.cause; 1364 rose->diagnostic = rose_cause.diagnostic; 1365 return 0; 1366 } 1367 1368 case SIOCRSSL2CALL: 1369 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1370 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1371 ax25_listen_release(&rose_callsign, NULL); 1372 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address))) 1373 return -EFAULT; 1374 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1375 return ax25_listen_register(&rose_callsign, NULL); 1376 1377 return 0; 1378 1379 case SIOCRSGL2CALL: 1380 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0; 1381 1382 case SIOCRSACCEPT: 1383 if (rose->state == ROSE_STATE_5) { 1384 rose_write_internal(sk, ROSE_CALL_ACCEPTED); 1385 rose_start_idletimer(sk); 1386 rose->condition = 0x00; 1387 rose->vs = 0; 1388 rose->va = 0; 1389 rose->vr = 0; 1390 rose->vl = 0; 1391 rose->state = ROSE_STATE_3; 1392 } 1393 return 0; 1394 1395 default: 1396 return -ENOIOCTLCMD; 1397 } 1398 1399 return 0; 1400 } 1401 1402 #ifdef CONFIG_PROC_FS 1403 static void *rose_info_start(struct seq_file *seq, loff_t *pos) 1404 __acquires(rose_list_lock) 1405 { 1406 int i; 1407 struct sock *s; 1408 struct hlist_node *node; 1409 1410 spin_lock_bh(&rose_list_lock); 1411 if (*pos == 0) 1412 return SEQ_START_TOKEN; 1413 1414 i = 1; 1415 sk_for_each(s, node, &rose_list) { 1416 if (i == *pos) 1417 return s; 1418 ++i; 1419 } 1420 return NULL; 1421 } 1422 1423 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos) 1424 { 1425 ++*pos; 1426 1427 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list) 1428 : sk_next((struct sock *)v); 1429 } 1430 1431 static void rose_info_stop(struct seq_file *seq, void *v) 1432 __releases(rose_list_lock) 1433 { 1434 spin_unlock_bh(&rose_list_lock); 1435 } 1436 1437 static int rose_info_show(struct seq_file *seq, void *v) 1438 { 1439 char buf[11], rsbuf[11]; 1440 1441 if (v == SEQ_START_TOKEN) 1442 seq_puts(seq, 1443 "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"); 1444 1445 else { 1446 struct sock *s = v; 1447 struct rose_sock *rose = rose_sk(s); 1448 const char *devname, *callsign; 1449 const struct net_device *dev = rose->device; 1450 1451 if (!dev) 1452 devname = "???"; 1453 else 1454 devname = dev->name; 1455 1456 seq_printf(seq, "%-10s %-9s ", 1457 rose2asc(rsbuf, &rose->dest_addr), 1458 ax2asc(buf, &rose->dest_call)); 1459 1460 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0) 1461 callsign = "??????-?"; 1462 else 1463 callsign = ax2asc(buf, &rose->source_call); 1464 1465 seq_printf(seq, 1466 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n", 1467 rose2asc(rsbuf, &rose->source_addr), 1468 callsign, 1469 devname, 1470 rose->lci & 0x0FFF, 1471 (rose->neighbour) ? rose->neighbour->number : 0, 1472 rose->state, 1473 rose->vs, 1474 rose->vr, 1475 rose->va, 1476 ax25_display_timer(&rose->timer) / HZ, 1477 rose->t1 / HZ, 1478 rose->t2 / HZ, 1479 rose->t3 / HZ, 1480 rose->hb / HZ, 1481 ax25_display_timer(&rose->idletimer) / (60 * HZ), 1482 rose->idle / (60 * HZ), 1483 sk_wmem_alloc_get(s), 1484 sk_rmem_alloc_get(s), 1485 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); 1486 } 1487 1488 return 0; 1489 } 1490 1491 static const struct seq_operations rose_info_seqops = { 1492 .start = rose_info_start, 1493 .next = rose_info_next, 1494 .stop = rose_info_stop, 1495 .show = rose_info_show, 1496 }; 1497 1498 static int rose_info_open(struct inode *inode, struct file *file) 1499 { 1500 return seq_open(file, &rose_info_seqops); 1501 } 1502 1503 static const struct file_operations rose_info_fops = { 1504 .owner = THIS_MODULE, 1505 .open = rose_info_open, 1506 .read = seq_read, 1507 .llseek = seq_lseek, 1508 .release = seq_release, 1509 }; 1510 #endif /* CONFIG_PROC_FS */ 1511 1512 static struct net_proto_family rose_family_ops = { 1513 .family = PF_ROSE, 1514 .create = rose_create, 1515 .owner = THIS_MODULE, 1516 }; 1517 1518 static const struct proto_ops rose_proto_ops = { 1519 .family = PF_ROSE, 1520 .owner = THIS_MODULE, 1521 .release = rose_release, 1522 .bind = rose_bind, 1523 .connect = rose_connect, 1524 .socketpair = sock_no_socketpair, 1525 .accept = rose_accept, 1526 .getname = rose_getname, 1527 .poll = datagram_poll, 1528 .ioctl = rose_ioctl, 1529 .listen = rose_listen, 1530 .shutdown = sock_no_shutdown, 1531 .setsockopt = rose_setsockopt, 1532 .getsockopt = rose_getsockopt, 1533 .sendmsg = rose_sendmsg, 1534 .recvmsg = rose_recvmsg, 1535 .mmap = sock_no_mmap, 1536 .sendpage = sock_no_sendpage, 1537 }; 1538 1539 static struct notifier_block rose_dev_notifier = { 1540 .notifier_call = rose_device_event, 1541 }; 1542 1543 static struct net_device **dev_rose; 1544 1545 static struct ax25_protocol rose_pid = { 1546 .pid = AX25_P_ROSE, 1547 .func = rose_route_frame 1548 }; 1549 1550 static struct ax25_linkfail rose_linkfail_notifier = { 1551 .func = rose_link_failed 1552 }; 1553 1554 static int __init rose_proto_init(void) 1555 { 1556 int i; 1557 int rc; 1558 1559 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) { 1560 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n"); 1561 rc = -EINVAL; 1562 goto out; 1563 } 1564 1565 rc = proto_register(&rose_proto, 0); 1566 if (rc != 0) 1567 goto out; 1568 1569 rose_callsign = null_ax25_address; 1570 1571 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL); 1572 if (dev_rose == NULL) { 1573 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n"); 1574 rc = -ENOMEM; 1575 goto out_proto_unregister; 1576 } 1577 1578 for (i = 0; i < rose_ndevs; i++) { 1579 struct net_device *dev; 1580 char name[IFNAMSIZ]; 1581 1582 sprintf(name, "rose%d", i); 1583 dev = alloc_netdev(0, name, rose_setup); 1584 if (!dev) { 1585 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n"); 1586 rc = -ENOMEM; 1587 goto fail; 1588 } 1589 rc = register_netdev(dev); 1590 if (rc) { 1591 printk(KERN_ERR "ROSE: netdevice registration failed\n"); 1592 free_netdev(dev); 1593 goto fail; 1594 } 1595 rose_set_lockdep_key(dev); 1596 dev_rose[i] = dev; 1597 } 1598 1599 sock_register(&rose_family_ops); 1600 register_netdevice_notifier(&rose_dev_notifier); 1601 1602 ax25_register_pid(&rose_pid); 1603 ax25_linkfail_register(&rose_linkfail_notifier); 1604 1605 #ifdef CONFIG_SYSCTL 1606 rose_register_sysctl(); 1607 #endif 1608 rose_loopback_init(); 1609 1610 rose_add_loopback_neigh(); 1611 1612 proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops); 1613 proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops); 1614 proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops); 1615 proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops); 1616 out: 1617 return rc; 1618 fail: 1619 while (--i >= 0) { 1620 unregister_netdev(dev_rose[i]); 1621 free_netdev(dev_rose[i]); 1622 } 1623 kfree(dev_rose); 1624 out_proto_unregister: 1625 proto_unregister(&rose_proto); 1626 goto out; 1627 } 1628 module_init(rose_proto_init); 1629 1630 module_param(rose_ndevs, int, 0); 1631 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices"); 1632 1633 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); 1634 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol"); 1635 MODULE_LICENSE("GPL"); 1636 MODULE_ALIAS_NETPROTO(PF_ROSE); 1637 1638 static void __exit rose_exit(void) 1639 { 1640 int i; 1641 1642 proc_net_remove(&init_net, "rose"); 1643 proc_net_remove(&init_net, "rose_neigh"); 1644 proc_net_remove(&init_net, "rose_nodes"); 1645 proc_net_remove(&init_net, "rose_routes"); 1646 rose_loopback_clear(); 1647 1648 rose_rt_free(); 1649 1650 ax25_protocol_release(AX25_P_ROSE); 1651 ax25_linkfail_release(&rose_linkfail_notifier); 1652 1653 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1654 ax25_listen_release(&rose_callsign, NULL); 1655 1656 #ifdef CONFIG_SYSCTL 1657 rose_unregister_sysctl(); 1658 #endif 1659 unregister_netdevice_notifier(&rose_dev_notifier); 1660 1661 sock_unregister(PF_ROSE); 1662 1663 for (i = 0; i < rose_ndevs; i++) { 1664 struct net_device *dev = dev_rose[i]; 1665 1666 if (dev) { 1667 unregister_netdev(dev); 1668 free_netdev(dev); 1669 } 1670 } 1671 1672 kfree(dev_rose); 1673 proto_unregister(&rose_proto); 1674 } 1675 1676 module_exit(rose_exit); 1677