1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License as published by 4 * the Free Software Foundation; either version 2 of the License, or 5 * (at your option) any later version. 6 * 7 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) 8 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk) 9 * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net) 10 * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi) 11 */ 12 13 #include <linux/capability.h> 14 #include <linux/module.h> 15 #include <linux/moduleparam.h> 16 #include <linux/init.h> 17 #include <linux/errno.h> 18 #include <linux/types.h> 19 #include <linux/socket.h> 20 #include <linux/in.h> 21 #include <linux/kernel.h> 22 #include <linux/sched.h> 23 #include <linux/spinlock.h> 24 #include <linux/timer.h> 25 #include <linux/string.h> 26 #include <linux/sockios.h> 27 #include <linux/net.h> 28 #include <linux/stat.h> 29 #include <net/net_namespace.h> 30 #include <net/ax25.h> 31 #include <linux/inet.h> 32 #include <linux/netdevice.h> 33 #include <linux/if_arp.h> 34 #include <linux/skbuff.h> 35 #include <net/sock.h> 36 #include <asm/system.h> 37 #include <asm/uaccess.h> 38 #include <linux/fcntl.h> 39 #include <linux/termios.h> 40 #include <linux/mm.h> 41 #include <linux/interrupt.h> 42 #include <linux/notifier.h> 43 #include <net/rose.h> 44 #include <linux/proc_fs.h> 45 #include <linux/seq_file.h> 46 #include <net/tcp_states.h> 47 #include <net/ip.h> 48 #include <net/arp.h> 49 50 static int rose_ndevs = 10; 51 52 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0; 53 int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1; 54 int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2; 55 int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3; 56 int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE; 57 int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB; 58 int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING; 59 int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT; 60 int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC; 61 int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE; 62 63 static HLIST_HEAD(rose_list); 64 static DEFINE_SPINLOCK(rose_list_lock); 65 66 static struct proto_ops rose_proto_ops; 67 68 ax25_address rose_callsign; 69 70 /* 71 * ROSE network devices are virtual network devices encapsulating ROSE 72 * frames into AX.25 which will be sent through an AX.25 device, so form a 73 * special "super class" of normal net devices; split their locks off into a 74 * separate class since they always nest. 75 */ 76 static struct lock_class_key rose_netdev_xmit_lock_key; 77 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, 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 if (peer != 0) { 958 if (sk->sk_state != TCP_ESTABLISHED) 959 return -ENOTCONN; 960 srose->srose_family = AF_ROSE; 961 srose->srose_addr = rose->dest_addr; 962 srose->srose_call = rose->dest_call; 963 srose->srose_ndigis = rose->dest_ndigis; 964 for (n = 0; n < rose->dest_ndigis; n++) 965 srose->srose_digis[n] = rose->dest_digis[n]; 966 } else { 967 srose->srose_family = AF_ROSE; 968 srose->srose_addr = rose->source_addr; 969 srose->srose_call = rose->source_call; 970 srose->srose_ndigis = rose->source_ndigis; 971 for (n = 0; n < rose->source_ndigis; n++) 972 srose->srose_digis[n] = rose->source_digis[n]; 973 } 974 975 *uaddr_len = sizeof(struct full_sockaddr_rose); 976 return 0; 977 } 978 979 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci) 980 { 981 struct sock *sk; 982 struct sock *make; 983 struct rose_sock *make_rose; 984 struct rose_facilities_struct facilities; 985 int n, len; 986 987 skb->sk = NULL; /* Initially we don't know who it's for */ 988 989 /* 990 * skb->data points to the rose frame start 991 */ 992 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct)); 993 994 len = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1; 995 len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1; 996 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) { 997 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76); 998 return 0; 999 } 1000 1001 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call); 1002 1003 /* 1004 * We can't accept the Call Request. 1005 */ 1006 if (sk == NULL || sk_acceptq_is_full(sk) || 1007 (make = rose_make_new(sk)) == NULL) { 1008 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120); 1009 return 0; 1010 } 1011 1012 skb->sk = make; 1013 make->sk_state = TCP_ESTABLISHED; 1014 make_rose = rose_sk(make); 1015 1016 make_rose->lci = lci; 1017 make_rose->dest_addr = facilities.dest_addr; 1018 make_rose->dest_call = facilities.dest_call; 1019 make_rose->dest_ndigis = facilities.dest_ndigis; 1020 for (n = 0 ; n < facilities.dest_ndigis ; n++) 1021 make_rose->dest_digis[n] = facilities.dest_digis[n]; 1022 make_rose->source_addr = facilities.source_addr; 1023 make_rose->source_call = facilities.source_call; 1024 make_rose->source_ndigis = facilities.source_ndigis; 1025 for (n = 0 ; n < facilities.source_ndigis ; n++) 1026 make_rose->source_digis[n]= facilities.source_digis[n]; 1027 make_rose->neighbour = neigh; 1028 make_rose->device = dev; 1029 make_rose->facilities = facilities; 1030 1031 make_rose->neighbour->use++; 1032 1033 if (rose_sk(sk)->defer) { 1034 make_rose->state = ROSE_STATE_5; 1035 } else { 1036 rose_write_internal(make, ROSE_CALL_ACCEPTED); 1037 make_rose->state = ROSE_STATE_3; 1038 rose_start_idletimer(make); 1039 } 1040 1041 make_rose->condition = 0x00; 1042 make_rose->vs = 0; 1043 make_rose->va = 0; 1044 make_rose->vr = 0; 1045 make_rose->vl = 0; 1046 sk->sk_ack_backlog++; 1047 1048 rose_insert_socket(make); 1049 1050 skb_queue_head(&sk->sk_receive_queue, skb); 1051 1052 rose_start_heartbeat(make); 1053 1054 if (!sock_flag(sk, SOCK_DEAD)) 1055 sk->sk_data_ready(sk, skb->len); 1056 1057 return 1; 1058 } 1059 1060 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock, 1061 struct msghdr *msg, size_t len) 1062 { 1063 struct sock *sk = sock->sk; 1064 struct rose_sock *rose = rose_sk(sk); 1065 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name; 1066 int err; 1067 struct full_sockaddr_rose srose; 1068 struct sk_buff *skb; 1069 unsigned char *asmptr; 1070 int n, size, qbit = 0; 1071 1072 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) 1073 return -EINVAL; 1074 1075 if (sock_flag(sk, SOCK_ZAPPED)) 1076 return -EADDRNOTAVAIL; 1077 1078 if (sk->sk_shutdown & SEND_SHUTDOWN) { 1079 send_sig(SIGPIPE, current, 0); 1080 return -EPIPE; 1081 } 1082 1083 if (rose->neighbour == NULL || rose->device == NULL) 1084 return -ENETUNREACH; 1085 1086 if (usrose != NULL) { 1087 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose)) 1088 return -EINVAL; 1089 memset(&srose, 0, sizeof(struct full_sockaddr_rose)); 1090 memcpy(&srose, usrose, msg->msg_namelen); 1091 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 || 1092 ax25cmp(&rose->dest_call, &srose.srose_call) != 0) 1093 return -EISCONN; 1094 if (srose.srose_ndigis != rose->dest_ndigis) 1095 return -EISCONN; 1096 if (srose.srose_ndigis == rose->dest_ndigis) { 1097 for (n = 0 ; n < srose.srose_ndigis ; n++) 1098 if (ax25cmp(&rose->dest_digis[n], 1099 &srose.srose_digis[n])) 1100 return -EISCONN; 1101 } 1102 if (srose.srose_family != AF_ROSE) 1103 return -EINVAL; 1104 } else { 1105 if (sk->sk_state != TCP_ESTABLISHED) 1106 return -ENOTCONN; 1107 1108 srose.srose_family = AF_ROSE; 1109 srose.srose_addr = rose->dest_addr; 1110 srose.srose_call = rose->dest_call; 1111 srose.srose_ndigis = rose->dest_ndigis; 1112 for (n = 0 ; n < rose->dest_ndigis ; n++) 1113 srose.srose_digis[n] = rose->dest_digis[n]; 1114 } 1115 1116 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n"); 1117 1118 /* Build a packet */ 1119 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n"); 1120 /* Sanity check the packet size */ 1121 if (len > 65535) 1122 return -EMSGSIZE; 1123 1124 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN; 1125 1126 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) 1127 return err; 1128 1129 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN); 1130 1131 /* 1132 * Put the data on the end 1133 */ 1134 SOCK_DEBUG(sk, "ROSE: Appending user data\n"); 1135 1136 skb_reset_transport_header(skb); 1137 skb_put(skb, len); 1138 1139 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len); 1140 if (err) { 1141 kfree_skb(skb); 1142 return err; 1143 } 1144 1145 /* 1146 * If the Q BIT Include socket option is in force, the first 1147 * byte of the user data is the logical value of the Q Bit. 1148 */ 1149 if (rose->qbitincl) { 1150 qbit = skb->data[0]; 1151 skb_pull(skb, 1); 1152 } 1153 1154 /* 1155 * Push down the ROSE header 1156 */ 1157 asmptr = skb_push(skb, ROSE_MIN_LEN); 1158 1159 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n"); 1160 1161 /* Build a ROSE Network header */ 1162 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI; 1163 asmptr[1] = (rose->lci >> 0) & 0xFF; 1164 asmptr[2] = ROSE_DATA; 1165 1166 if (qbit) 1167 asmptr[0] |= ROSE_Q_BIT; 1168 1169 SOCK_DEBUG(sk, "ROSE: Built header.\n"); 1170 1171 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n"); 1172 1173 if (sk->sk_state != TCP_ESTABLISHED) { 1174 kfree_skb(skb); 1175 return -ENOTCONN; 1176 } 1177 1178 #ifdef M_BIT 1179 #define ROSE_PACLEN (256-ROSE_MIN_LEN) 1180 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) { 1181 unsigned char header[ROSE_MIN_LEN]; 1182 struct sk_buff *skbn; 1183 int frontlen; 1184 int lg; 1185 1186 /* Save a copy of the Header */ 1187 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN); 1188 skb_pull(skb, ROSE_MIN_LEN); 1189 1190 frontlen = skb_headroom(skb); 1191 1192 while (skb->len > 0) { 1193 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) { 1194 kfree_skb(skb); 1195 return err; 1196 } 1197 1198 skbn->sk = sk; 1199 skbn->free = 1; 1200 skbn->arp = 1; 1201 1202 skb_reserve(skbn, frontlen); 1203 1204 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN; 1205 1206 /* Copy the user data */ 1207 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg); 1208 skb_pull(skb, lg); 1209 1210 /* Duplicate the Header */ 1211 skb_push(skbn, ROSE_MIN_LEN); 1212 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN); 1213 1214 if (skb->len > 0) 1215 skbn->data[2] |= M_BIT; 1216 1217 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */ 1218 } 1219 1220 skb->free = 1; 1221 kfree_skb(skb); 1222 } else { 1223 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */ 1224 } 1225 #else 1226 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */ 1227 #endif 1228 1229 rose_kick(sk); 1230 1231 return len; 1232 } 1233 1234 1235 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock, 1236 struct msghdr *msg, size_t size, int flags) 1237 { 1238 struct sock *sk = sock->sk; 1239 struct rose_sock *rose = rose_sk(sk); 1240 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name; 1241 size_t copied; 1242 unsigned char *asmptr; 1243 struct sk_buff *skb; 1244 int n, er, qbit; 1245 1246 /* 1247 * This works for seqpacket too. The receiver has ordered the queue for 1248 * us! We do one quick check first though 1249 */ 1250 if (sk->sk_state != TCP_ESTABLISHED) 1251 return -ENOTCONN; 1252 1253 /* Now we can treat all alike */ 1254 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) 1255 return er; 1256 1257 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT; 1258 1259 skb_pull(skb, ROSE_MIN_LEN); 1260 1261 if (rose->qbitincl) { 1262 asmptr = skb_push(skb, 1); 1263 *asmptr = qbit; 1264 } 1265 1266 skb_reset_transport_header(skb); 1267 copied = skb->len; 1268 1269 if (copied > size) { 1270 copied = size; 1271 msg->msg_flags |= MSG_TRUNC; 1272 } 1273 1274 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 1275 1276 if (srose != NULL) { 1277 srose->srose_family = AF_ROSE; 1278 srose->srose_addr = rose->dest_addr; 1279 srose->srose_call = rose->dest_call; 1280 srose->srose_ndigis = rose->dest_ndigis; 1281 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) { 1282 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name; 1283 for (n = 0 ; n < rose->dest_ndigis ; n++) 1284 full_srose->srose_digis[n] = rose->dest_digis[n]; 1285 msg->msg_namelen = sizeof(struct full_sockaddr_rose); 1286 } else { 1287 if (rose->dest_ndigis >= 1) { 1288 srose->srose_ndigis = 1; 1289 srose->srose_digi = rose->dest_digis[0]; 1290 } 1291 msg->msg_namelen = sizeof(struct sockaddr_rose); 1292 } 1293 } 1294 1295 skb_free_datagram(sk, skb); 1296 1297 return copied; 1298 } 1299 1300 1301 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1302 { 1303 struct sock *sk = sock->sk; 1304 struct rose_sock *rose = rose_sk(sk); 1305 void __user *argp = (void __user *)arg; 1306 1307 switch (cmd) { 1308 case TIOCOUTQ: { 1309 long amount; 1310 1311 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); 1312 if (amount < 0) 1313 amount = 0; 1314 return put_user(amount, (unsigned int __user *) argp); 1315 } 1316 1317 case TIOCINQ: { 1318 struct sk_buff *skb; 1319 long amount = 0L; 1320 /* These two are safe on a single CPU system as only user tasks fiddle here */ 1321 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) 1322 amount = skb->len; 1323 return put_user(amount, (unsigned int __user *) argp); 1324 } 1325 1326 case SIOCGSTAMP: 1327 return sock_get_timestamp(sk, (struct timeval __user *) argp); 1328 1329 case SIOCGSTAMPNS: 1330 return sock_get_timestampns(sk, (struct timespec __user *) argp); 1331 1332 case SIOCGIFADDR: 1333 case SIOCSIFADDR: 1334 case SIOCGIFDSTADDR: 1335 case SIOCSIFDSTADDR: 1336 case SIOCGIFBRDADDR: 1337 case SIOCSIFBRDADDR: 1338 case SIOCGIFNETMASK: 1339 case SIOCSIFNETMASK: 1340 case SIOCGIFMETRIC: 1341 case SIOCSIFMETRIC: 1342 return -EINVAL; 1343 1344 case SIOCADDRT: 1345 case SIOCDELRT: 1346 case SIOCRSCLRRT: 1347 if (!capable(CAP_NET_ADMIN)) 1348 return -EPERM; 1349 return rose_rt_ioctl(cmd, argp); 1350 1351 case SIOCRSGCAUSE: { 1352 struct rose_cause_struct rose_cause; 1353 rose_cause.cause = rose->cause; 1354 rose_cause.diagnostic = rose->diagnostic; 1355 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0; 1356 } 1357 1358 case SIOCRSSCAUSE: { 1359 struct rose_cause_struct rose_cause; 1360 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct))) 1361 return -EFAULT; 1362 rose->cause = rose_cause.cause; 1363 rose->diagnostic = rose_cause.diagnostic; 1364 return 0; 1365 } 1366 1367 case SIOCRSSL2CALL: 1368 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1369 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1370 ax25_listen_release(&rose_callsign, NULL); 1371 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address))) 1372 return -EFAULT; 1373 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1374 return ax25_listen_register(&rose_callsign, NULL); 1375 1376 return 0; 1377 1378 case SIOCRSGL2CALL: 1379 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0; 1380 1381 case SIOCRSACCEPT: 1382 if (rose->state == ROSE_STATE_5) { 1383 rose_write_internal(sk, ROSE_CALL_ACCEPTED); 1384 rose_start_idletimer(sk); 1385 rose->condition = 0x00; 1386 rose->vs = 0; 1387 rose->va = 0; 1388 rose->vr = 0; 1389 rose->vl = 0; 1390 rose->state = ROSE_STATE_3; 1391 } 1392 return 0; 1393 1394 default: 1395 return -ENOIOCTLCMD; 1396 } 1397 1398 return 0; 1399 } 1400 1401 #ifdef CONFIG_PROC_FS 1402 static void *rose_info_start(struct seq_file *seq, loff_t *pos) 1403 __acquires(rose_list_lock) 1404 { 1405 int i; 1406 struct sock *s; 1407 struct hlist_node *node; 1408 1409 spin_lock_bh(&rose_list_lock); 1410 if (*pos == 0) 1411 return SEQ_START_TOKEN; 1412 1413 i = 1; 1414 sk_for_each(s, node, &rose_list) { 1415 if (i == *pos) 1416 return s; 1417 ++i; 1418 } 1419 return NULL; 1420 } 1421 1422 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos) 1423 { 1424 ++*pos; 1425 1426 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list) 1427 : sk_next((struct sock *)v); 1428 } 1429 1430 static void rose_info_stop(struct seq_file *seq, void *v) 1431 __releases(rose_list_lock) 1432 { 1433 spin_unlock_bh(&rose_list_lock); 1434 } 1435 1436 static int rose_info_show(struct seq_file *seq, void *v) 1437 { 1438 char buf[11], rsbuf[11]; 1439 1440 if (v == SEQ_START_TOKEN) 1441 seq_puts(seq, 1442 "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"); 1443 1444 else { 1445 struct sock *s = v; 1446 struct rose_sock *rose = rose_sk(s); 1447 const char *devname, *callsign; 1448 const struct net_device *dev = rose->device; 1449 1450 if (!dev) 1451 devname = "???"; 1452 else 1453 devname = dev->name; 1454 1455 seq_printf(seq, "%-10s %-9s ", 1456 rose2asc(rsbuf, &rose->dest_addr), 1457 ax2asc(buf, &rose->dest_call)); 1458 1459 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0) 1460 callsign = "??????-?"; 1461 else 1462 callsign = ax2asc(buf, &rose->source_call); 1463 1464 seq_printf(seq, 1465 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n", 1466 rose2asc(rsbuf, &rose->source_addr), 1467 callsign, 1468 devname, 1469 rose->lci & 0x0FFF, 1470 (rose->neighbour) ? rose->neighbour->number : 0, 1471 rose->state, 1472 rose->vs, 1473 rose->vr, 1474 rose->va, 1475 ax25_display_timer(&rose->timer) / HZ, 1476 rose->t1 / HZ, 1477 rose->t2 / HZ, 1478 rose->t3 / HZ, 1479 rose->hb / HZ, 1480 ax25_display_timer(&rose->idletimer) / (60 * HZ), 1481 rose->idle / (60 * HZ), 1482 sk_wmem_alloc_get(s), 1483 sk_rmem_alloc_get(s), 1484 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); 1485 } 1486 1487 return 0; 1488 } 1489 1490 static const struct seq_operations rose_info_seqops = { 1491 .start = rose_info_start, 1492 .next = rose_info_next, 1493 .stop = rose_info_stop, 1494 .show = rose_info_show, 1495 }; 1496 1497 static int rose_info_open(struct inode *inode, struct file *file) 1498 { 1499 return seq_open(file, &rose_info_seqops); 1500 } 1501 1502 static const struct file_operations rose_info_fops = { 1503 .owner = THIS_MODULE, 1504 .open = rose_info_open, 1505 .read = seq_read, 1506 .llseek = seq_lseek, 1507 .release = seq_release, 1508 }; 1509 #endif /* CONFIG_PROC_FS */ 1510 1511 static struct net_proto_family rose_family_ops = { 1512 .family = PF_ROSE, 1513 .create = rose_create, 1514 .owner = THIS_MODULE, 1515 }; 1516 1517 static struct proto_ops rose_proto_ops = { 1518 .family = PF_ROSE, 1519 .owner = THIS_MODULE, 1520 .release = rose_release, 1521 .bind = rose_bind, 1522 .connect = rose_connect, 1523 .socketpair = sock_no_socketpair, 1524 .accept = rose_accept, 1525 .getname = rose_getname, 1526 .poll = datagram_poll, 1527 .ioctl = rose_ioctl, 1528 .listen = rose_listen, 1529 .shutdown = sock_no_shutdown, 1530 .setsockopt = rose_setsockopt, 1531 .getsockopt = rose_getsockopt, 1532 .sendmsg = rose_sendmsg, 1533 .recvmsg = rose_recvmsg, 1534 .mmap = sock_no_mmap, 1535 .sendpage = sock_no_sendpage, 1536 }; 1537 1538 static struct notifier_block rose_dev_notifier = { 1539 .notifier_call = rose_device_event, 1540 }; 1541 1542 static struct net_device **dev_rose; 1543 1544 static struct ax25_protocol rose_pid = { 1545 .pid = AX25_P_ROSE, 1546 .func = rose_route_frame 1547 }; 1548 1549 static struct ax25_linkfail rose_linkfail_notifier = { 1550 .func = rose_link_failed 1551 }; 1552 1553 static int __init rose_proto_init(void) 1554 { 1555 int i; 1556 int rc; 1557 1558 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) { 1559 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n"); 1560 rc = -EINVAL; 1561 goto out; 1562 } 1563 1564 rc = proto_register(&rose_proto, 0); 1565 if (rc != 0) 1566 goto out; 1567 1568 rose_callsign = null_ax25_address; 1569 1570 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL); 1571 if (dev_rose == NULL) { 1572 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n"); 1573 rc = -ENOMEM; 1574 goto out_proto_unregister; 1575 } 1576 1577 for (i = 0; i < rose_ndevs; i++) { 1578 struct net_device *dev; 1579 char name[IFNAMSIZ]; 1580 1581 sprintf(name, "rose%d", i); 1582 dev = alloc_netdev(0, name, rose_setup); 1583 if (!dev) { 1584 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n"); 1585 rc = -ENOMEM; 1586 goto fail; 1587 } 1588 rc = register_netdev(dev); 1589 if (rc) { 1590 printk(KERN_ERR "ROSE: netdevice registration failed\n"); 1591 free_netdev(dev); 1592 goto fail; 1593 } 1594 rose_set_lockdep_key(dev); 1595 dev_rose[i] = dev; 1596 } 1597 1598 sock_register(&rose_family_ops); 1599 register_netdevice_notifier(&rose_dev_notifier); 1600 1601 ax25_register_pid(&rose_pid); 1602 ax25_linkfail_register(&rose_linkfail_notifier); 1603 1604 #ifdef CONFIG_SYSCTL 1605 rose_register_sysctl(); 1606 #endif 1607 rose_loopback_init(); 1608 1609 rose_add_loopback_neigh(); 1610 1611 proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops); 1612 proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops); 1613 proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops); 1614 proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops); 1615 out: 1616 return rc; 1617 fail: 1618 while (--i >= 0) { 1619 unregister_netdev(dev_rose[i]); 1620 free_netdev(dev_rose[i]); 1621 } 1622 kfree(dev_rose); 1623 out_proto_unregister: 1624 proto_unregister(&rose_proto); 1625 goto out; 1626 } 1627 module_init(rose_proto_init); 1628 1629 module_param(rose_ndevs, int, 0); 1630 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices"); 1631 1632 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); 1633 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol"); 1634 MODULE_LICENSE("GPL"); 1635 MODULE_ALIAS_NETPROTO(PF_ROSE); 1636 1637 static void __exit rose_exit(void) 1638 { 1639 int i; 1640 1641 proc_net_remove(&init_net, "rose"); 1642 proc_net_remove(&init_net, "rose_neigh"); 1643 proc_net_remove(&init_net, "rose_nodes"); 1644 proc_net_remove(&init_net, "rose_routes"); 1645 rose_loopback_clear(); 1646 1647 rose_rt_free(); 1648 1649 ax25_protocol_release(AX25_P_ROSE); 1650 ax25_linkfail_release(&rose_linkfail_notifier); 1651 1652 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1653 ax25_listen_release(&rose_callsign, NULL); 1654 1655 #ifdef CONFIG_SYSCTL 1656 rose_unregister_sysctl(); 1657 #endif 1658 unregister_netdevice_notifier(&rose_dev_notifier); 1659 1660 sock_unregister(PF_ROSE); 1661 1662 for (i = 0; i < rose_ndevs; i++) { 1663 struct net_device *dev = dev_rose[i]; 1664 1665 if (dev) { 1666 unregister_netdev(dev); 1667 free_netdev(dev); 1668 } 1669 } 1670 1671 kfree(dev_rose); 1672 proto_unregister(&rose_proto); 1673 } 1674 1675 module_exit(rose_exit); 1676