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 int kern) 517 { 518 struct sock *sk; 519 struct rose_sock *rose; 520 521 if (!net_eq(net, &init_net)) 522 return -EAFNOSUPPORT; 523 524 if (sock->type != SOCK_SEQPACKET || protocol != 0) 525 return -ESOCKTNOSUPPORT; 526 527 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto); 528 if (sk == NULL) 529 return -ENOMEM; 530 531 rose = rose_sk(sk); 532 533 sock_init_data(sock, sk); 534 535 skb_queue_head_init(&rose->ack_queue); 536 #ifdef M_BIT 537 skb_queue_head_init(&rose->frag_queue); 538 rose->fraglen = 0; 539 #endif 540 541 sock->ops = &rose_proto_ops; 542 sk->sk_protocol = protocol; 543 544 init_timer(&rose->timer); 545 init_timer(&rose->idletimer); 546 547 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout); 548 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout); 549 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout); 550 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout); 551 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout); 552 553 rose->state = ROSE_STATE_0; 554 555 return 0; 556 } 557 558 static struct sock *rose_make_new(struct sock *osk) 559 { 560 struct sock *sk; 561 struct rose_sock *rose, *orose; 562 563 if (osk->sk_type != SOCK_SEQPACKET) 564 return NULL; 565 566 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto); 567 if (sk == NULL) 568 return NULL; 569 570 rose = rose_sk(sk); 571 572 sock_init_data(NULL, sk); 573 574 skb_queue_head_init(&rose->ack_queue); 575 #ifdef M_BIT 576 skb_queue_head_init(&rose->frag_queue); 577 rose->fraglen = 0; 578 #endif 579 580 sk->sk_type = osk->sk_type; 581 sk->sk_priority = osk->sk_priority; 582 sk->sk_protocol = osk->sk_protocol; 583 sk->sk_rcvbuf = osk->sk_rcvbuf; 584 sk->sk_sndbuf = osk->sk_sndbuf; 585 sk->sk_state = TCP_ESTABLISHED; 586 sock_copy_flags(sk, osk); 587 588 init_timer(&rose->timer); 589 init_timer(&rose->idletimer); 590 591 orose = rose_sk(osk); 592 rose->t1 = orose->t1; 593 rose->t2 = orose->t2; 594 rose->t3 = orose->t3; 595 rose->hb = orose->hb; 596 rose->idle = orose->idle; 597 rose->defer = orose->defer; 598 rose->device = orose->device; 599 rose->qbitincl = orose->qbitincl; 600 601 return sk; 602 } 603 604 static int rose_release(struct socket *sock) 605 { 606 struct sock *sk = sock->sk; 607 struct rose_sock *rose; 608 609 if (sk == NULL) return 0; 610 611 sock_hold(sk); 612 sock_orphan(sk); 613 lock_sock(sk); 614 rose = rose_sk(sk); 615 616 switch (rose->state) { 617 case ROSE_STATE_0: 618 release_sock(sk); 619 rose_disconnect(sk, 0, -1, -1); 620 lock_sock(sk); 621 rose_destroy_socket(sk); 622 break; 623 624 case ROSE_STATE_2: 625 rose->neighbour->use--; 626 release_sock(sk); 627 rose_disconnect(sk, 0, -1, -1); 628 lock_sock(sk); 629 rose_destroy_socket(sk); 630 break; 631 632 case ROSE_STATE_1: 633 case ROSE_STATE_3: 634 case ROSE_STATE_4: 635 case ROSE_STATE_5: 636 rose_clear_queues(sk); 637 rose_stop_idletimer(sk); 638 rose_write_internal(sk, ROSE_CLEAR_REQUEST); 639 rose_start_t3timer(sk); 640 rose->state = ROSE_STATE_2; 641 sk->sk_state = TCP_CLOSE; 642 sk->sk_shutdown |= SEND_SHUTDOWN; 643 sk->sk_state_change(sk); 644 sock_set_flag(sk, SOCK_DEAD); 645 sock_set_flag(sk, SOCK_DESTROY); 646 break; 647 648 default: 649 break; 650 } 651 652 sock->sk = NULL; 653 release_sock(sk); 654 sock_put(sk); 655 656 return 0; 657 } 658 659 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) 660 { 661 struct sock *sk = sock->sk; 662 struct rose_sock *rose = rose_sk(sk); 663 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; 664 struct net_device *dev; 665 ax25_address *source; 666 ax25_uid_assoc *user; 667 int n; 668 669 if (!sock_flag(sk, SOCK_ZAPPED)) 670 return -EINVAL; 671 672 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) 673 return -EINVAL; 674 675 if (addr->srose_family != AF_ROSE) 676 return -EINVAL; 677 678 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) 679 return -EINVAL; 680 681 if (addr->srose_ndigis > ROSE_MAX_DIGIS) 682 return -EINVAL; 683 684 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) { 685 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n"); 686 return -EADDRNOTAVAIL; 687 } 688 689 source = &addr->srose_call; 690 691 user = ax25_findbyuid(current_euid()); 692 if (user) { 693 rose->source_call = user->call; 694 ax25_uid_put(user); 695 } else { 696 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) 697 return -EACCES; 698 rose->source_call = *source; 699 } 700 701 rose->source_addr = addr->srose_addr; 702 rose->device = dev; 703 rose->source_ndigis = addr->srose_ndigis; 704 705 if (addr_len == sizeof(struct full_sockaddr_rose)) { 706 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; 707 for (n = 0 ; n < addr->srose_ndigis ; n++) 708 rose->source_digis[n] = full_addr->srose_digis[n]; 709 } else { 710 if (rose->source_ndigis == 1) { 711 rose->source_digis[0] = addr->srose_digi; 712 } 713 } 714 715 rose_insert_socket(sk); 716 717 sock_reset_flag(sk, SOCK_ZAPPED); 718 SOCK_DEBUG(sk, "ROSE: socket is bound\n"); 719 return 0; 720 } 721 722 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags) 723 { 724 struct sock *sk = sock->sk; 725 struct rose_sock *rose = rose_sk(sk); 726 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; 727 unsigned char cause, diagnostic; 728 struct net_device *dev; 729 ax25_uid_assoc *user; 730 int n, err = 0; 731 732 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) 733 return -EINVAL; 734 735 if (addr->srose_family != AF_ROSE) 736 return -EINVAL; 737 738 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) 739 return -EINVAL; 740 741 if (addr->srose_ndigis > ROSE_MAX_DIGIS) 742 return -EINVAL; 743 744 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */ 745 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS) 746 return -EINVAL; 747 748 lock_sock(sk); 749 750 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { 751 /* Connect completed during a ERESTARTSYS event */ 752 sock->state = SS_CONNECTED; 753 goto out_release; 754 } 755 756 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { 757 sock->state = SS_UNCONNECTED; 758 err = -ECONNREFUSED; 759 goto out_release; 760 } 761 762 if (sk->sk_state == TCP_ESTABLISHED) { 763 /* No reconnect on a seqpacket socket */ 764 err = -EISCONN; 765 goto out_release; 766 } 767 768 sk->sk_state = TCP_CLOSE; 769 sock->state = SS_UNCONNECTED; 770 771 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, 772 &diagnostic, 0); 773 if (!rose->neighbour) { 774 err = -ENETUNREACH; 775 goto out_release; 776 } 777 778 rose->lci = rose_new_lci(rose->neighbour); 779 if (!rose->lci) { 780 err = -ENETUNREACH; 781 goto out_release; 782 } 783 784 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ 785 sock_reset_flag(sk, SOCK_ZAPPED); 786 787 if ((dev = rose_dev_first()) == NULL) { 788 err = -ENETUNREACH; 789 goto out_release; 790 } 791 792 user = ax25_findbyuid(current_euid()); 793 if (!user) { 794 err = -EINVAL; 795 goto out_release; 796 } 797 798 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN); 799 rose->source_call = user->call; 800 rose->device = dev; 801 ax25_uid_put(user); 802 803 rose_insert_socket(sk); /* Finish the bind */ 804 } 805 rose_try_next_neigh: 806 rose->dest_addr = addr->srose_addr; 807 rose->dest_call = addr->srose_call; 808 rose->rand = ((long)rose & 0xFFFF) + rose->lci; 809 rose->dest_ndigis = addr->srose_ndigis; 810 811 if (addr_len == sizeof(struct full_sockaddr_rose)) { 812 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; 813 for (n = 0 ; n < addr->srose_ndigis ; n++) 814 rose->dest_digis[n] = full_addr->srose_digis[n]; 815 } else { 816 if (rose->dest_ndigis == 1) { 817 rose->dest_digis[0] = addr->srose_digi; 818 } 819 } 820 821 /* Move to connecting socket, start sending Connect Requests */ 822 sock->state = SS_CONNECTING; 823 sk->sk_state = TCP_SYN_SENT; 824 825 rose->state = ROSE_STATE_1; 826 827 rose->neighbour->use++; 828 829 rose_write_internal(sk, ROSE_CALL_REQUEST); 830 rose_start_heartbeat(sk); 831 rose_start_t1timer(sk); 832 833 /* Now the loop */ 834 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { 835 err = -EINPROGRESS; 836 goto out_release; 837 } 838 839 /* 840 * A Connect Ack with Choke or timeout or failed routing will go to 841 * closed. 842 */ 843 if (sk->sk_state == TCP_SYN_SENT) { 844 DEFINE_WAIT(wait); 845 846 for (;;) { 847 prepare_to_wait(sk->sk_sleep, &wait, 848 TASK_INTERRUPTIBLE); 849 if (sk->sk_state != TCP_SYN_SENT) 850 break; 851 if (!signal_pending(current)) { 852 release_sock(sk); 853 schedule(); 854 lock_sock(sk); 855 continue; 856 } 857 err = -ERESTARTSYS; 858 break; 859 } 860 finish_wait(sk->sk_sleep, &wait); 861 862 if (err) 863 goto out_release; 864 } 865 866 if (sk->sk_state != TCP_ESTABLISHED) { 867 /* Try next neighbour */ 868 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic, 0); 869 if (rose->neighbour) 870 goto rose_try_next_neigh; 871 872 /* No more neighbours */ 873 sock->state = SS_UNCONNECTED; 874 err = sock_error(sk); /* Always set at this point */ 875 goto out_release; 876 } 877 878 sock->state = SS_CONNECTED; 879 880 out_release: 881 release_sock(sk); 882 883 return err; 884 } 885 886 static int rose_accept(struct socket *sock, struct socket *newsock, int flags) 887 { 888 struct sk_buff *skb; 889 struct sock *newsk; 890 DEFINE_WAIT(wait); 891 struct sock *sk; 892 int err = 0; 893 894 if ((sk = sock->sk) == NULL) 895 return -EINVAL; 896 897 lock_sock(sk); 898 if (sk->sk_type != SOCK_SEQPACKET) { 899 err = -EOPNOTSUPP; 900 goto out_release; 901 } 902 903 if (sk->sk_state != TCP_LISTEN) { 904 err = -EINVAL; 905 goto out_release; 906 } 907 908 /* 909 * The write queue this time is holding sockets ready to use 910 * hooked into the SABM we saved 911 */ 912 for (;;) { 913 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); 914 915 skb = skb_dequeue(&sk->sk_receive_queue); 916 if (skb) 917 break; 918 919 if (flags & O_NONBLOCK) { 920 err = -EWOULDBLOCK; 921 break; 922 } 923 if (!signal_pending(current)) { 924 release_sock(sk); 925 schedule(); 926 lock_sock(sk); 927 continue; 928 } 929 err = -ERESTARTSYS; 930 break; 931 } 932 finish_wait(sk->sk_sleep, &wait); 933 if (err) 934 goto out_release; 935 936 newsk = skb->sk; 937 sock_graft(newsk, newsock); 938 939 /* Now attach up the new socket */ 940 skb->sk = NULL; 941 kfree_skb(skb); 942 sk->sk_ack_backlog--; 943 944 out_release: 945 release_sock(sk); 946 947 return err; 948 } 949 950 static int rose_getname(struct socket *sock, struct sockaddr *uaddr, 951 int *uaddr_len, int peer) 952 { 953 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr; 954 struct sock *sk = sock->sk; 955 struct rose_sock *rose = rose_sk(sk); 956 int n; 957 958 memset(srose, 0, sizeof(*srose)); 959 if (peer != 0) { 960 if (sk->sk_state != TCP_ESTABLISHED) 961 return -ENOTCONN; 962 srose->srose_family = AF_ROSE; 963 srose->srose_addr = rose->dest_addr; 964 srose->srose_call = rose->dest_call; 965 srose->srose_ndigis = rose->dest_ndigis; 966 for (n = 0; n < rose->dest_ndigis; n++) 967 srose->srose_digis[n] = rose->dest_digis[n]; 968 } else { 969 srose->srose_family = AF_ROSE; 970 srose->srose_addr = rose->source_addr; 971 srose->srose_call = rose->source_call; 972 srose->srose_ndigis = rose->source_ndigis; 973 for (n = 0; n < rose->source_ndigis; n++) 974 srose->srose_digis[n] = rose->source_digis[n]; 975 } 976 977 *uaddr_len = sizeof(struct full_sockaddr_rose); 978 return 0; 979 } 980 981 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci) 982 { 983 struct sock *sk; 984 struct sock *make; 985 struct rose_sock *make_rose; 986 struct rose_facilities_struct facilities; 987 int n, len; 988 989 skb->sk = NULL; /* Initially we don't know who it's for */ 990 991 /* 992 * skb->data points to the rose frame start 993 */ 994 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct)); 995 996 len = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1; 997 len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1; 998 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) { 999 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76); 1000 return 0; 1001 } 1002 1003 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call); 1004 1005 /* 1006 * We can't accept the Call Request. 1007 */ 1008 if (sk == NULL || sk_acceptq_is_full(sk) || 1009 (make = rose_make_new(sk)) == NULL) { 1010 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120); 1011 return 0; 1012 } 1013 1014 skb->sk = make; 1015 make->sk_state = TCP_ESTABLISHED; 1016 make_rose = rose_sk(make); 1017 1018 make_rose->lci = lci; 1019 make_rose->dest_addr = facilities.dest_addr; 1020 make_rose->dest_call = facilities.dest_call; 1021 make_rose->dest_ndigis = facilities.dest_ndigis; 1022 for (n = 0 ; n < facilities.dest_ndigis ; n++) 1023 make_rose->dest_digis[n] = facilities.dest_digis[n]; 1024 make_rose->source_addr = facilities.source_addr; 1025 make_rose->source_call = facilities.source_call; 1026 make_rose->source_ndigis = facilities.source_ndigis; 1027 for (n = 0 ; n < facilities.source_ndigis ; n++) 1028 make_rose->source_digis[n]= facilities.source_digis[n]; 1029 make_rose->neighbour = neigh; 1030 make_rose->device = dev; 1031 make_rose->facilities = facilities; 1032 1033 make_rose->neighbour->use++; 1034 1035 if (rose_sk(sk)->defer) { 1036 make_rose->state = ROSE_STATE_5; 1037 } else { 1038 rose_write_internal(make, ROSE_CALL_ACCEPTED); 1039 make_rose->state = ROSE_STATE_3; 1040 rose_start_idletimer(make); 1041 } 1042 1043 make_rose->condition = 0x00; 1044 make_rose->vs = 0; 1045 make_rose->va = 0; 1046 make_rose->vr = 0; 1047 make_rose->vl = 0; 1048 sk->sk_ack_backlog++; 1049 1050 rose_insert_socket(make); 1051 1052 skb_queue_head(&sk->sk_receive_queue, skb); 1053 1054 rose_start_heartbeat(make); 1055 1056 if (!sock_flag(sk, SOCK_DEAD)) 1057 sk->sk_data_ready(sk, skb->len); 1058 1059 return 1; 1060 } 1061 1062 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock, 1063 struct msghdr *msg, size_t len) 1064 { 1065 struct sock *sk = sock->sk; 1066 struct rose_sock *rose = rose_sk(sk); 1067 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name; 1068 int err; 1069 struct full_sockaddr_rose srose; 1070 struct sk_buff *skb; 1071 unsigned char *asmptr; 1072 int n, size, qbit = 0; 1073 1074 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) 1075 return -EINVAL; 1076 1077 if (sock_flag(sk, SOCK_ZAPPED)) 1078 return -EADDRNOTAVAIL; 1079 1080 if (sk->sk_shutdown & SEND_SHUTDOWN) { 1081 send_sig(SIGPIPE, current, 0); 1082 return -EPIPE; 1083 } 1084 1085 if (rose->neighbour == NULL || rose->device == NULL) 1086 return -ENETUNREACH; 1087 1088 if (usrose != NULL) { 1089 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose)) 1090 return -EINVAL; 1091 memset(&srose, 0, sizeof(struct full_sockaddr_rose)); 1092 memcpy(&srose, usrose, msg->msg_namelen); 1093 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 || 1094 ax25cmp(&rose->dest_call, &srose.srose_call) != 0) 1095 return -EISCONN; 1096 if (srose.srose_ndigis != rose->dest_ndigis) 1097 return -EISCONN; 1098 if (srose.srose_ndigis == rose->dest_ndigis) { 1099 for (n = 0 ; n < srose.srose_ndigis ; n++) 1100 if (ax25cmp(&rose->dest_digis[n], 1101 &srose.srose_digis[n])) 1102 return -EISCONN; 1103 } 1104 if (srose.srose_family != AF_ROSE) 1105 return -EINVAL; 1106 } else { 1107 if (sk->sk_state != TCP_ESTABLISHED) 1108 return -ENOTCONN; 1109 1110 srose.srose_family = AF_ROSE; 1111 srose.srose_addr = rose->dest_addr; 1112 srose.srose_call = rose->dest_call; 1113 srose.srose_ndigis = rose->dest_ndigis; 1114 for (n = 0 ; n < rose->dest_ndigis ; n++) 1115 srose.srose_digis[n] = rose->dest_digis[n]; 1116 } 1117 1118 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n"); 1119 1120 /* Build a packet */ 1121 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n"); 1122 /* Sanity check the packet size */ 1123 if (len > 65535) 1124 return -EMSGSIZE; 1125 1126 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN; 1127 1128 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) 1129 return err; 1130 1131 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN); 1132 1133 /* 1134 * Put the data on the end 1135 */ 1136 SOCK_DEBUG(sk, "ROSE: Appending user data\n"); 1137 1138 skb_reset_transport_header(skb); 1139 skb_put(skb, len); 1140 1141 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len); 1142 if (err) { 1143 kfree_skb(skb); 1144 return err; 1145 } 1146 1147 /* 1148 * If the Q BIT Include socket option is in force, the first 1149 * byte of the user data is the logical value of the Q Bit. 1150 */ 1151 if (rose->qbitincl) { 1152 qbit = skb->data[0]; 1153 skb_pull(skb, 1); 1154 } 1155 1156 /* 1157 * Push down the ROSE header 1158 */ 1159 asmptr = skb_push(skb, ROSE_MIN_LEN); 1160 1161 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n"); 1162 1163 /* Build a ROSE Network header */ 1164 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI; 1165 asmptr[1] = (rose->lci >> 0) & 0xFF; 1166 asmptr[2] = ROSE_DATA; 1167 1168 if (qbit) 1169 asmptr[0] |= ROSE_Q_BIT; 1170 1171 SOCK_DEBUG(sk, "ROSE: Built header.\n"); 1172 1173 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n"); 1174 1175 if (sk->sk_state != TCP_ESTABLISHED) { 1176 kfree_skb(skb); 1177 return -ENOTCONN; 1178 } 1179 1180 #ifdef M_BIT 1181 #define ROSE_PACLEN (256-ROSE_MIN_LEN) 1182 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) { 1183 unsigned char header[ROSE_MIN_LEN]; 1184 struct sk_buff *skbn; 1185 int frontlen; 1186 int lg; 1187 1188 /* Save a copy of the Header */ 1189 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN); 1190 skb_pull(skb, ROSE_MIN_LEN); 1191 1192 frontlen = skb_headroom(skb); 1193 1194 while (skb->len > 0) { 1195 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) { 1196 kfree_skb(skb); 1197 return err; 1198 } 1199 1200 skbn->sk = sk; 1201 skbn->free = 1; 1202 skbn->arp = 1; 1203 1204 skb_reserve(skbn, frontlen); 1205 1206 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN; 1207 1208 /* Copy the user data */ 1209 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg); 1210 skb_pull(skb, lg); 1211 1212 /* Duplicate the Header */ 1213 skb_push(skbn, ROSE_MIN_LEN); 1214 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN); 1215 1216 if (skb->len > 0) 1217 skbn->data[2] |= M_BIT; 1218 1219 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */ 1220 } 1221 1222 skb->free = 1; 1223 kfree_skb(skb); 1224 } else { 1225 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */ 1226 } 1227 #else 1228 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */ 1229 #endif 1230 1231 rose_kick(sk); 1232 1233 return len; 1234 } 1235 1236 1237 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock, 1238 struct msghdr *msg, size_t size, int flags) 1239 { 1240 struct sock *sk = sock->sk; 1241 struct rose_sock *rose = rose_sk(sk); 1242 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name; 1243 size_t copied; 1244 unsigned char *asmptr; 1245 struct sk_buff *skb; 1246 int n, er, qbit; 1247 1248 /* 1249 * This works for seqpacket too. The receiver has ordered the queue for 1250 * us! We do one quick check first though 1251 */ 1252 if (sk->sk_state != TCP_ESTABLISHED) 1253 return -ENOTCONN; 1254 1255 /* Now we can treat all alike */ 1256 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) 1257 return er; 1258 1259 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT; 1260 1261 skb_pull(skb, ROSE_MIN_LEN); 1262 1263 if (rose->qbitincl) { 1264 asmptr = skb_push(skb, 1); 1265 *asmptr = qbit; 1266 } 1267 1268 skb_reset_transport_header(skb); 1269 copied = skb->len; 1270 1271 if (copied > size) { 1272 copied = size; 1273 msg->msg_flags |= MSG_TRUNC; 1274 } 1275 1276 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 1277 1278 if (srose != NULL) { 1279 srose->srose_family = AF_ROSE; 1280 srose->srose_addr = rose->dest_addr; 1281 srose->srose_call = rose->dest_call; 1282 srose->srose_ndigis = rose->dest_ndigis; 1283 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) { 1284 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name; 1285 for (n = 0 ; n < rose->dest_ndigis ; n++) 1286 full_srose->srose_digis[n] = rose->dest_digis[n]; 1287 msg->msg_namelen = sizeof(struct full_sockaddr_rose); 1288 } else { 1289 if (rose->dest_ndigis >= 1) { 1290 srose->srose_ndigis = 1; 1291 srose->srose_digi = rose->dest_digis[0]; 1292 } 1293 msg->msg_namelen = sizeof(struct sockaddr_rose); 1294 } 1295 } 1296 1297 skb_free_datagram(sk, skb); 1298 1299 return copied; 1300 } 1301 1302 1303 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1304 { 1305 struct sock *sk = sock->sk; 1306 struct rose_sock *rose = rose_sk(sk); 1307 void __user *argp = (void __user *)arg; 1308 1309 switch (cmd) { 1310 case TIOCOUTQ: { 1311 long amount; 1312 1313 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); 1314 if (amount < 0) 1315 amount = 0; 1316 return put_user(amount, (unsigned int __user *) argp); 1317 } 1318 1319 case TIOCINQ: { 1320 struct sk_buff *skb; 1321 long amount = 0L; 1322 /* These two are safe on a single CPU system as only user tasks fiddle here */ 1323 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) 1324 amount = skb->len; 1325 return put_user(amount, (unsigned int __user *) argp); 1326 } 1327 1328 case SIOCGSTAMP: 1329 return sock_get_timestamp(sk, (struct timeval __user *) argp); 1330 1331 case SIOCGSTAMPNS: 1332 return sock_get_timestampns(sk, (struct timespec __user *) argp); 1333 1334 case SIOCGIFADDR: 1335 case SIOCSIFADDR: 1336 case SIOCGIFDSTADDR: 1337 case SIOCSIFDSTADDR: 1338 case SIOCGIFBRDADDR: 1339 case SIOCSIFBRDADDR: 1340 case SIOCGIFNETMASK: 1341 case SIOCSIFNETMASK: 1342 case SIOCGIFMETRIC: 1343 case SIOCSIFMETRIC: 1344 return -EINVAL; 1345 1346 case SIOCADDRT: 1347 case SIOCDELRT: 1348 case SIOCRSCLRRT: 1349 if (!capable(CAP_NET_ADMIN)) 1350 return -EPERM; 1351 return rose_rt_ioctl(cmd, argp); 1352 1353 case SIOCRSGCAUSE: { 1354 struct rose_cause_struct rose_cause; 1355 rose_cause.cause = rose->cause; 1356 rose_cause.diagnostic = rose->diagnostic; 1357 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0; 1358 } 1359 1360 case SIOCRSSCAUSE: { 1361 struct rose_cause_struct rose_cause; 1362 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct))) 1363 return -EFAULT; 1364 rose->cause = rose_cause.cause; 1365 rose->diagnostic = rose_cause.diagnostic; 1366 return 0; 1367 } 1368 1369 case SIOCRSSL2CALL: 1370 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1371 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1372 ax25_listen_release(&rose_callsign, NULL); 1373 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address))) 1374 return -EFAULT; 1375 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1376 return ax25_listen_register(&rose_callsign, NULL); 1377 1378 return 0; 1379 1380 case SIOCRSGL2CALL: 1381 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0; 1382 1383 case SIOCRSACCEPT: 1384 if (rose->state == ROSE_STATE_5) { 1385 rose_write_internal(sk, ROSE_CALL_ACCEPTED); 1386 rose_start_idletimer(sk); 1387 rose->condition = 0x00; 1388 rose->vs = 0; 1389 rose->va = 0; 1390 rose->vr = 0; 1391 rose->vl = 0; 1392 rose->state = ROSE_STATE_3; 1393 } 1394 return 0; 1395 1396 default: 1397 return -ENOIOCTLCMD; 1398 } 1399 1400 return 0; 1401 } 1402 1403 #ifdef CONFIG_PROC_FS 1404 static void *rose_info_start(struct seq_file *seq, loff_t *pos) 1405 __acquires(rose_list_lock) 1406 { 1407 int i; 1408 struct sock *s; 1409 struct hlist_node *node; 1410 1411 spin_lock_bh(&rose_list_lock); 1412 if (*pos == 0) 1413 return SEQ_START_TOKEN; 1414 1415 i = 1; 1416 sk_for_each(s, node, &rose_list) { 1417 if (i == *pos) 1418 return s; 1419 ++i; 1420 } 1421 return NULL; 1422 } 1423 1424 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos) 1425 { 1426 ++*pos; 1427 1428 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list) 1429 : sk_next((struct sock *)v); 1430 } 1431 1432 static void rose_info_stop(struct seq_file *seq, void *v) 1433 __releases(rose_list_lock) 1434 { 1435 spin_unlock_bh(&rose_list_lock); 1436 } 1437 1438 static int rose_info_show(struct seq_file *seq, void *v) 1439 { 1440 char buf[11], rsbuf[11]; 1441 1442 if (v == SEQ_START_TOKEN) 1443 seq_puts(seq, 1444 "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"); 1445 1446 else { 1447 struct sock *s = v; 1448 struct rose_sock *rose = rose_sk(s); 1449 const char *devname, *callsign; 1450 const struct net_device *dev = rose->device; 1451 1452 if (!dev) 1453 devname = "???"; 1454 else 1455 devname = dev->name; 1456 1457 seq_printf(seq, "%-10s %-9s ", 1458 rose2asc(rsbuf, &rose->dest_addr), 1459 ax2asc(buf, &rose->dest_call)); 1460 1461 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0) 1462 callsign = "??????-?"; 1463 else 1464 callsign = ax2asc(buf, &rose->source_call); 1465 1466 seq_printf(seq, 1467 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n", 1468 rose2asc(rsbuf, &rose->source_addr), 1469 callsign, 1470 devname, 1471 rose->lci & 0x0FFF, 1472 (rose->neighbour) ? rose->neighbour->number : 0, 1473 rose->state, 1474 rose->vs, 1475 rose->vr, 1476 rose->va, 1477 ax25_display_timer(&rose->timer) / HZ, 1478 rose->t1 / HZ, 1479 rose->t2 / HZ, 1480 rose->t3 / HZ, 1481 rose->hb / HZ, 1482 ax25_display_timer(&rose->idletimer) / (60 * HZ), 1483 rose->idle / (60 * HZ), 1484 sk_wmem_alloc_get(s), 1485 sk_rmem_alloc_get(s), 1486 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); 1487 } 1488 1489 return 0; 1490 } 1491 1492 static const struct seq_operations rose_info_seqops = { 1493 .start = rose_info_start, 1494 .next = rose_info_next, 1495 .stop = rose_info_stop, 1496 .show = rose_info_show, 1497 }; 1498 1499 static int rose_info_open(struct inode *inode, struct file *file) 1500 { 1501 return seq_open(file, &rose_info_seqops); 1502 } 1503 1504 static const struct file_operations rose_info_fops = { 1505 .owner = THIS_MODULE, 1506 .open = rose_info_open, 1507 .read = seq_read, 1508 .llseek = seq_lseek, 1509 .release = seq_release, 1510 }; 1511 #endif /* CONFIG_PROC_FS */ 1512 1513 static const struct net_proto_family rose_family_ops = { 1514 .family = PF_ROSE, 1515 .create = rose_create, 1516 .owner = THIS_MODULE, 1517 }; 1518 1519 static const struct proto_ops rose_proto_ops = { 1520 .family = PF_ROSE, 1521 .owner = THIS_MODULE, 1522 .release = rose_release, 1523 .bind = rose_bind, 1524 .connect = rose_connect, 1525 .socketpair = sock_no_socketpair, 1526 .accept = rose_accept, 1527 .getname = rose_getname, 1528 .poll = datagram_poll, 1529 .ioctl = rose_ioctl, 1530 .listen = rose_listen, 1531 .shutdown = sock_no_shutdown, 1532 .setsockopt = rose_setsockopt, 1533 .getsockopt = rose_getsockopt, 1534 .sendmsg = rose_sendmsg, 1535 .recvmsg = rose_recvmsg, 1536 .mmap = sock_no_mmap, 1537 .sendpage = sock_no_sendpage, 1538 }; 1539 1540 static struct notifier_block rose_dev_notifier = { 1541 .notifier_call = rose_device_event, 1542 }; 1543 1544 static struct net_device **dev_rose; 1545 1546 static struct ax25_protocol rose_pid = { 1547 .pid = AX25_P_ROSE, 1548 .func = rose_route_frame 1549 }; 1550 1551 static struct ax25_linkfail rose_linkfail_notifier = { 1552 .func = rose_link_failed 1553 }; 1554 1555 static int __init rose_proto_init(void) 1556 { 1557 int i; 1558 int rc; 1559 1560 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) { 1561 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n"); 1562 rc = -EINVAL; 1563 goto out; 1564 } 1565 1566 rc = proto_register(&rose_proto, 0); 1567 if (rc != 0) 1568 goto out; 1569 1570 rose_callsign = null_ax25_address; 1571 1572 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL); 1573 if (dev_rose == NULL) { 1574 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n"); 1575 rc = -ENOMEM; 1576 goto out_proto_unregister; 1577 } 1578 1579 for (i = 0; i < rose_ndevs; i++) { 1580 struct net_device *dev; 1581 char name[IFNAMSIZ]; 1582 1583 sprintf(name, "rose%d", i); 1584 dev = alloc_netdev(0, name, rose_setup); 1585 if (!dev) { 1586 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n"); 1587 rc = -ENOMEM; 1588 goto fail; 1589 } 1590 rc = register_netdev(dev); 1591 if (rc) { 1592 printk(KERN_ERR "ROSE: netdevice registration failed\n"); 1593 free_netdev(dev); 1594 goto fail; 1595 } 1596 rose_set_lockdep_key(dev); 1597 dev_rose[i] = dev; 1598 } 1599 1600 sock_register(&rose_family_ops); 1601 register_netdevice_notifier(&rose_dev_notifier); 1602 1603 ax25_register_pid(&rose_pid); 1604 ax25_linkfail_register(&rose_linkfail_notifier); 1605 1606 #ifdef CONFIG_SYSCTL 1607 rose_register_sysctl(); 1608 #endif 1609 rose_loopback_init(); 1610 1611 rose_add_loopback_neigh(); 1612 1613 proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops); 1614 proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops); 1615 proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops); 1616 proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops); 1617 out: 1618 return rc; 1619 fail: 1620 while (--i >= 0) { 1621 unregister_netdev(dev_rose[i]); 1622 free_netdev(dev_rose[i]); 1623 } 1624 kfree(dev_rose); 1625 out_proto_unregister: 1626 proto_unregister(&rose_proto); 1627 goto out; 1628 } 1629 module_init(rose_proto_init); 1630 1631 module_param(rose_ndevs, int, 0); 1632 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices"); 1633 1634 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); 1635 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol"); 1636 MODULE_LICENSE("GPL"); 1637 MODULE_ALIAS_NETPROTO(PF_ROSE); 1638 1639 static void __exit rose_exit(void) 1640 { 1641 int i; 1642 1643 proc_net_remove(&init_net, "rose"); 1644 proc_net_remove(&init_net, "rose_neigh"); 1645 proc_net_remove(&init_net, "rose_nodes"); 1646 proc_net_remove(&init_net, "rose_routes"); 1647 rose_loopback_clear(); 1648 1649 rose_rt_free(); 1650 1651 ax25_protocol_release(AX25_P_ROSE); 1652 ax25_linkfail_release(&rose_linkfail_notifier); 1653 1654 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1655 ax25_listen_release(&rose_callsign, NULL); 1656 1657 #ifdef CONFIG_SYSCTL 1658 rose_unregister_sysctl(); 1659 #endif 1660 unregister_netdevice_notifier(&rose_dev_notifier); 1661 1662 sock_unregister(PF_ROSE); 1663 1664 for (i = 0; i < rose_ndevs; i++) { 1665 struct net_device *dev = dev_rose[i]; 1666 1667 if (dev) { 1668 unregister_netdev(dev); 1669 free_netdev(dev); 1670 } 1671 } 1672 1673 kfree(dev_rose); 1674 proto_unregister(&rose_proto); 1675 } 1676 1677 module_exit(rose_exit); 1678