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