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 78 /* 79 * Convert a ROSE address into text. 80 */ 81 const char *rose2asc(const rose_address *addr) 82 { 83 static char buffer[11]; 84 85 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 && 86 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 && 87 addr->rose_addr[4] == 0x00) { 88 strcpy(buffer, "*"); 89 } else { 90 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF, 91 addr->rose_addr[1] & 0xFF, 92 addr->rose_addr[2] & 0xFF, 93 addr->rose_addr[3] & 0xFF, 94 addr->rose_addr[4] & 0xFF); 95 } 96 97 return buffer; 98 } 99 100 /* 101 * Compare two ROSE addresses, 0 == equal. 102 */ 103 int rosecmp(rose_address *addr1, rose_address *addr2) 104 { 105 int i; 106 107 for (i = 0; i < 5; i++) 108 if (addr1->rose_addr[i] != addr2->rose_addr[i]) 109 return 1; 110 111 return 0; 112 } 113 114 /* 115 * Compare two ROSE addresses for only mask digits, 0 == equal. 116 */ 117 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask) 118 { 119 int i, j; 120 121 if (mask > 10) 122 return 1; 123 124 for (i = 0; i < mask; i++) { 125 j = i / 2; 126 127 if ((i % 2) != 0) { 128 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F)) 129 return 1; 130 } else { 131 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0)) 132 return 1; 133 } 134 } 135 136 return 0; 137 } 138 139 /* 140 * Socket removal during an interrupt is now safe. 141 */ 142 static void rose_remove_socket(struct sock *sk) 143 { 144 spin_lock_bh(&rose_list_lock); 145 sk_del_node_init(sk); 146 spin_unlock_bh(&rose_list_lock); 147 } 148 149 /* 150 * Kill all bound sockets on a broken link layer connection to a 151 * particular neighbour. 152 */ 153 void rose_kill_by_neigh(struct rose_neigh *neigh) 154 { 155 struct sock *s; 156 struct hlist_node *node; 157 158 spin_lock_bh(&rose_list_lock); 159 sk_for_each(s, node, &rose_list) { 160 struct rose_sock *rose = rose_sk(s); 161 162 if (rose->neighbour == neigh) { 163 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); 164 rose->neighbour->use--; 165 rose->neighbour = NULL; 166 } 167 } 168 spin_unlock_bh(&rose_list_lock); 169 } 170 171 /* 172 * Kill all bound sockets on a dropped device. 173 */ 174 static void rose_kill_by_device(struct net_device *dev) 175 { 176 struct sock *s; 177 struct hlist_node *node; 178 179 spin_lock_bh(&rose_list_lock); 180 sk_for_each(s, node, &rose_list) { 181 struct rose_sock *rose = rose_sk(s); 182 183 if (rose->device == dev) { 184 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); 185 rose->neighbour->use--; 186 rose->device = NULL; 187 } 188 } 189 spin_unlock_bh(&rose_list_lock); 190 } 191 192 /* 193 * Handle device status changes. 194 */ 195 static int rose_device_event(struct notifier_block *this, unsigned long event, 196 void *ptr) 197 { 198 struct net_device *dev = (struct net_device *)ptr; 199 200 if (dev->nd_net != &init_net) 201 return NOTIFY_DONE; 202 203 if (event != NETDEV_DOWN) 204 return NOTIFY_DONE; 205 206 switch (dev->type) { 207 case ARPHRD_ROSE: 208 rose_kill_by_device(dev); 209 break; 210 case ARPHRD_AX25: 211 rose_link_device_down(dev); 212 rose_rt_device_down(dev); 213 break; 214 } 215 216 return NOTIFY_DONE; 217 } 218 219 /* 220 * Add a socket to the bound sockets list. 221 */ 222 static void rose_insert_socket(struct sock *sk) 223 { 224 225 spin_lock_bh(&rose_list_lock); 226 sk_add_node(sk, &rose_list); 227 spin_unlock_bh(&rose_list_lock); 228 } 229 230 /* 231 * Find a socket that wants to accept the Call Request we just 232 * received. 233 */ 234 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call) 235 { 236 struct sock *s; 237 struct hlist_node *node; 238 239 spin_lock_bh(&rose_list_lock); 240 sk_for_each(s, node, &rose_list) { 241 struct rose_sock *rose = rose_sk(s); 242 243 if (!rosecmp(&rose->source_addr, addr) && 244 !ax25cmp(&rose->source_call, call) && 245 !rose->source_ndigis && s->sk_state == TCP_LISTEN) 246 goto found; 247 } 248 249 sk_for_each(s, node, &rose_list) { 250 struct rose_sock *rose = rose_sk(s); 251 252 if (!rosecmp(&rose->source_addr, addr) && 253 !ax25cmp(&rose->source_call, &null_ax25_address) && 254 s->sk_state == TCP_LISTEN) 255 goto found; 256 } 257 s = NULL; 258 found: 259 spin_unlock_bh(&rose_list_lock); 260 return s; 261 } 262 263 /* 264 * Find a connected ROSE socket given my LCI and device. 265 */ 266 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh) 267 { 268 struct sock *s; 269 struct hlist_node *node; 270 271 spin_lock_bh(&rose_list_lock); 272 sk_for_each(s, node, &rose_list) { 273 struct rose_sock *rose = rose_sk(s); 274 275 if (rose->lci == lci && rose->neighbour == neigh) 276 goto found; 277 } 278 s = NULL; 279 found: 280 spin_unlock_bh(&rose_list_lock); 281 return s; 282 } 283 284 /* 285 * Find a unique LCI for a given device. 286 */ 287 unsigned int rose_new_lci(struct rose_neigh *neigh) 288 { 289 int lci; 290 291 if (neigh->dce_mode) { 292 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++) 293 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) 294 return lci; 295 } else { 296 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--) 297 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) 298 return lci; 299 } 300 301 return 0; 302 } 303 304 /* 305 * Deferred destroy. 306 */ 307 void rose_destroy_socket(struct sock *); 308 309 /* 310 * Handler for deferred kills. 311 */ 312 static void rose_destroy_timer(unsigned long data) 313 { 314 rose_destroy_socket((struct sock *)data); 315 } 316 317 /* 318 * This is called from user mode and the timers. Thus it protects itself 319 * against interrupt users but doesn't worry about being called during 320 * work. Once it is removed from the queue no interrupt or bottom half 321 * will touch it and we are (fairly 8-) ) safe. 322 */ 323 void rose_destroy_socket(struct sock *sk) 324 { 325 struct sk_buff *skb; 326 327 rose_remove_socket(sk); 328 rose_stop_heartbeat(sk); 329 rose_stop_idletimer(sk); 330 rose_stop_timer(sk); 331 332 rose_clear_queues(sk); /* Flush the queues */ 333 334 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { 335 if (skb->sk != sk) { /* A pending connection */ 336 /* Queue the unaccepted socket for death */ 337 sock_set_flag(skb->sk, SOCK_DEAD); 338 rose_start_heartbeat(skb->sk); 339 rose_sk(skb->sk)->state = ROSE_STATE_0; 340 } 341 342 kfree_skb(skb); 343 } 344 345 if (atomic_read(&sk->sk_wmem_alloc) || 346 atomic_read(&sk->sk_rmem_alloc)) { 347 /* Defer: outstanding buffers */ 348 init_timer(&sk->sk_timer); 349 sk->sk_timer.expires = jiffies + 10 * HZ; 350 sk->sk_timer.function = rose_destroy_timer; 351 sk->sk_timer.data = (unsigned long)sk; 352 add_timer(&sk->sk_timer); 353 } else 354 sock_put(sk); 355 } 356 357 /* 358 * Handling for system calls applied via the various interfaces to a 359 * ROSE socket object. 360 */ 361 362 static int rose_setsockopt(struct socket *sock, int level, int optname, 363 char __user *optval, int optlen) 364 { 365 struct sock *sk = sock->sk; 366 struct rose_sock *rose = rose_sk(sk); 367 int opt; 368 369 if (level != SOL_ROSE) 370 return -ENOPROTOOPT; 371 372 if (optlen < sizeof(int)) 373 return -EINVAL; 374 375 if (get_user(opt, (int __user *)optval)) 376 return -EFAULT; 377 378 switch (optname) { 379 case ROSE_DEFER: 380 rose->defer = opt ? 1 : 0; 381 return 0; 382 383 case ROSE_T1: 384 if (opt < 1) 385 return -EINVAL; 386 rose->t1 = opt * HZ; 387 return 0; 388 389 case ROSE_T2: 390 if (opt < 1) 391 return -EINVAL; 392 rose->t2 = opt * HZ; 393 return 0; 394 395 case ROSE_T3: 396 if (opt < 1) 397 return -EINVAL; 398 rose->t3 = opt * HZ; 399 return 0; 400 401 case ROSE_HOLDBACK: 402 if (opt < 1) 403 return -EINVAL; 404 rose->hb = opt * HZ; 405 return 0; 406 407 case ROSE_IDLE: 408 if (opt < 0) 409 return -EINVAL; 410 rose->idle = opt * 60 * HZ; 411 return 0; 412 413 case ROSE_QBITINCL: 414 rose->qbitincl = opt ? 1 : 0; 415 return 0; 416 417 default: 418 return -ENOPROTOOPT; 419 } 420 } 421 422 static int rose_getsockopt(struct socket *sock, int level, int optname, 423 char __user *optval, int __user *optlen) 424 { 425 struct sock *sk = sock->sk; 426 struct rose_sock *rose = rose_sk(sk); 427 int val = 0; 428 int len; 429 430 if (level != SOL_ROSE) 431 return -ENOPROTOOPT; 432 433 if (get_user(len, optlen)) 434 return -EFAULT; 435 436 if (len < 0) 437 return -EINVAL; 438 439 switch (optname) { 440 case ROSE_DEFER: 441 val = rose->defer; 442 break; 443 444 case ROSE_T1: 445 val = rose->t1 / HZ; 446 break; 447 448 case ROSE_T2: 449 val = rose->t2 / HZ; 450 break; 451 452 case ROSE_T3: 453 val = rose->t3 / HZ; 454 break; 455 456 case ROSE_HOLDBACK: 457 val = rose->hb / HZ; 458 break; 459 460 case ROSE_IDLE: 461 val = rose->idle / (60 * HZ); 462 break; 463 464 case ROSE_QBITINCL: 465 val = rose->qbitincl; 466 break; 467 468 default: 469 return -ENOPROTOOPT; 470 } 471 472 len = min_t(unsigned int, len, sizeof(int)); 473 474 if (put_user(len, optlen)) 475 return -EFAULT; 476 477 return copy_to_user(optval, &val, len) ? -EFAULT : 0; 478 } 479 480 static int rose_listen(struct socket *sock, int backlog) 481 { 482 struct sock *sk = sock->sk; 483 484 if (sk->sk_state != TCP_LISTEN) { 485 struct rose_sock *rose = rose_sk(sk); 486 487 rose->dest_ndigis = 0; 488 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN); 489 memset(&rose->dest_call, 0, AX25_ADDR_LEN); 490 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS); 491 sk->sk_max_ack_backlog = backlog; 492 sk->sk_state = TCP_LISTEN; 493 return 0; 494 } 495 496 return -EOPNOTSUPP; 497 } 498 499 static struct proto rose_proto = { 500 .name = "ROSE", 501 .owner = THIS_MODULE, 502 .obj_size = sizeof(struct rose_sock), 503 }; 504 505 static int rose_create(struct net *net, struct socket *sock, int protocol) 506 { 507 struct sock *sk; 508 struct rose_sock *rose; 509 510 if (net != &init_net) 511 return -EAFNOSUPPORT; 512 513 if (sock->type != SOCK_SEQPACKET || protocol != 0) 514 return -ESOCKTNOSUPPORT; 515 516 if ((sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL) 517 return -ENOMEM; 518 519 rose = rose_sk(sk); 520 521 sock_init_data(sock, sk); 522 523 skb_queue_head_init(&rose->ack_queue); 524 #ifdef M_BIT 525 skb_queue_head_init(&rose->frag_queue); 526 rose->fraglen = 0; 527 #endif 528 529 sock->ops = &rose_proto_ops; 530 sk->sk_protocol = protocol; 531 532 init_timer(&rose->timer); 533 init_timer(&rose->idletimer); 534 535 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout); 536 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout); 537 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout); 538 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout); 539 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout); 540 541 rose->state = ROSE_STATE_0; 542 543 return 0; 544 } 545 546 static struct sock *rose_make_new(struct sock *osk) 547 { 548 struct sock *sk; 549 struct rose_sock *rose, *orose; 550 551 if (osk->sk_type != SOCK_SEQPACKET) 552 return NULL; 553 554 if ((sk = sk_alloc(osk->sk_net, PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL) 555 return NULL; 556 557 rose = rose_sk(sk); 558 559 sock_init_data(NULL, sk); 560 561 skb_queue_head_init(&rose->ack_queue); 562 #ifdef M_BIT 563 skb_queue_head_init(&rose->frag_queue); 564 rose->fraglen = 0; 565 #endif 566 567 sk->sk_type = osk->sk_type; 568 sk->sk_socket = osk->sk_socket; 569 sk->sk_priority = osk->sk_priority; 570 sk->sk_protocol = osk->sk_protocol; 571 sk->sk_rcvbuf = osk->sk_rcvbuf; 572 sk->sk_sndbuf = osk->sk_sndbuf; 573 sk->sk_state = TCP_ESTABLISHED; 574 sk->sk_sleep = osk->sk_sleep; 575 sock_copy_flags(sk, osk); 576 577 init_timer(&rose->timer); 578 init_timer(&rose->idletimer); 579 580 orose = rose_sk(osk); 581 rose->t1 = orose->t1; 582 rose->t2 = orose->t2; 583 rose->t3 = orose->t3; 584 rose->hb = orose->hb; 585 rose->idle = orose->idle; 586 rose->defer = orose->defer; 587 rose->device = orose->device; 588 rose->qbitincl = orose->qbitincl; 589 590 return sk; 591 } 592 593 static int rose_release(struct socket *sock) 594 { 595 struct sock *sk = sock->sk; 596 struct rose_sock *rose; 597 598 if (sk == NULL) return 0; 599 600 rose = rose_sk(sk); 601 602 switch (rose->state) { 603 case ROSE_STATE_0: 604 rose_disconnect(sk, 0, -1, -1); 605 rose_destroy_socket(sk); 606 break; 607 608 case ROSE_STATE_2: 609 rose->neighbour->use--; 610 rose_disconnect(sk, 0, -1, -1); 611 rose_destroy_socket(sk); 612 break; 613 614 case ROSE_STATE_1: 615 case ROSE_STATE_3: 616 case ROSE_STATE_4: 617 case ROSE_STATE_5: 618 rose_clear_queues(sk); 619 rose_stop_idletimer(sk); 620 rose_write_internal(sk, ROSE_CLEAR_REQUEST); 621 rose_start_t3timer(sk); 622 rose->state = ROSE_STATE_2; 623 sk->sk_state = TCP_CLOSE; 624 sk->sk_shutdown |= SEND_SHUTDOWN; 625 sk->sk_state_change(sk); 626 sock_set_flag(sk, SOCK_DEAD); 627 sock_set_flag(sk, SOCK_DESTROY); 628 break; 629 630 default: 631 break; 632 } 633 634 sock->sk = NULL; 635 636 return 0; 637 } 638 639 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) 640 { 641 struct sock *sk = sock->sk; 642 struct rose_sock *rose = rose_sk(sk); 643 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; 644 struct net_device *dev; 645 ax25_address *source; 646 ax25_uid_assoc *user; 647 int n; 648 649 if (!sock_flag(sk, SOCK_ZAPPED)) 650 return -EINVAL; 651 652 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) 653 return -EINVAL; 654 655 if (addr->srose_family != AF_ROSE) 656 return -EINVAL; 657 658 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) 659 return -EINVAL; 660 661 if (addr->srose_ndigis > ROSE_MAX_DIGIS) 662 return -EINVAL; 663 664 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) { 665 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n"); 666 return -EADDRNOTAVAIL; 667 } 668 669 source = &addr->srose_call; 670 671 user = ax25_findbyuid(current->euid); 672 if (user) { 673 rose->source_call = user->call; 674 ax25_uid_put(user); 675 } else { 676 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) 677 return -EACCES; 678 rose->source_call = *source; 679 } 680 681 rose->source_addr = addr->srose_addr; 682 rose->device = dev; 683 rose->source_ndigis = addr->srose_ndigis; 684 685 if (addr_len == sizeof(struct full_sockaddr_rose)) { 686 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; 687 for (n = 0 ; n < addr->srose_ndigis ; n++) 688 rose->source_digis[n] = full_addr->srose_digis[n]; 689 } else { 690 if (rose->source_ndigis == 1) { 691 rose->source_digis[0] = addr->srose_digi; 692 } 693 } 694 695 rose_insert_socket(sk); 696 697 sock_reset_flag(sk, SOCK_ZAPPED); 698 SOCK_DEBUG(sk, "ROSE: socket is bound\n"); 699 return 0; 700 } 701 702 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags) 703 { 704 struct sock *sk = sock->sk; 705 struct rose_sock *rose = rose_sk(sk); 706 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; 707 unsigned char cause, diagnostic; 708 struct net_device *dev; 709 ax25_uid_assoc *user; 710 int n, err = 0; 711 712 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) 713 return -EINVAL; 714 715 if (addr->srose_family != AF_ROSE) 716 return -EINVAL; 717 718 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) 719 return -EINVAL; 720 721 if (addr->srose_ndigis > ROSE_MAX_DIGIS) 722 return -EINVAL; 723 724 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */ 725 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS) 726 return -EINVAL; 727 728 lock_sock(sk); 729 730 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { 731 /* Connect completed during a ERESTARTSYS event */ 732 sock->state = SS_CONNECTED; 733 goto out_release; 734 } 735 736 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { 737 sock->state = SS_UNCONNECTED; 738 err = -ECONNREFUSED; 739 goto out_release; 740 } 741 742 if (sk->sk_state == TCP_ESTABLISHED) { 743 /* No reconnect on a seqpacket socket */ 744 err = -EISCONN; 745 goto out_release; 746 } 747 748 sk->sk_state = TCP_CLOSE; 749 sock->state = SS_UNCONNECTED; 750 751 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, 752 &diagnostic); 753 if (!rose->neighbour) 754 return -ENETUNREACH; 755 756 rose->lci = rose_new_lci(rose->neighbour); 757 if (!rose->lci) { 758 err = -ENETUNREACH; 759 goto out_release; 760 } 761 762 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ 763 sock_reset_flag(sk, SOCK_ZAPPED); 764 765 if ((dev = rose_dev_first()) == NULL) { 766 err = -ENETUNREACH; 767 goto out_release; 768 } 769 770 user = ax25_findbyuid(current->euid); 771 if (!user) { 772 err = -EINVAL; 773 goto out_release; 774 } 775 776 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN); 777 rose->source_call = user->call; 778 rose->device = dev; 779 ax25_uid_put(user); 780 781 rose_insert_socket(sk); /* Finish the bind */ 782 } 783 rose_try_next_neigh: 784 rose->dest_addr = addr->srose_addr; 785 rose->dest_call = addr->srose_call; 786 rose->rand = ((long)rose & 0xFFFF) + rose->lci; 787 rose->dest_ndigis = addr->srose_ndigis; 788 789 if (addr_len == sizeof(struct full_sockaddr_rose)) { 790 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; 791 for (n = 0 ; n < addr->srose_ndigis ; n++) 792 rose->dest_digis[n] = full_addr->srose_digis[n]; 793 } else { 794 if (rose->dest_ndigis == 1) { 795 rose->dest_digis[0] = addr->srose_digi; 796 } 797 } 798 799 /* Move to connecting socket, start sending Connect Requests */ 800 sock->state = SS_CONNECTING; 801 sk->sk_state = TCP_SYN_SENT; 802 803 rose->state = ROSE_STATE_1; 804 805 rose->neighbour->use++; 806 807 rose_write_internal(sk, ROSE_CALL_REQUEST); 808 rose_start_heartbeat(sk); 809 rose_start_t1timer(sk); 810 811 /* Now the loop */ 812 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { 813 err = -EINPROGRESS; 814 goto out_release; 815 } 816 817 /* 818 * A Connect Ack with Choke or timeout or failed routing will go to 819 * closed. 820 */ 821 if (sk->sk_state == TCP_SYN_SENT) { 822 DEFINE_WAIT(wait); 823 824 for (;;) { 825 prepare_to_wait(sk->sk_sleep, &wait, 826 TASK_INTERRUPTIBLE); 827 if (sk->sk_state != TCP_SYN_SENT) 828 break; 829 if (!signal_pending(current)) { 830 release_sock(sk); 831 schedule(); 832 lock_sock(sk); 833 continue; 834 } 835 err = -ERESTARTSYS; 836 break; 837 } 838 finish_wait(sk->sk_sleep, &wait); 839 840 if (err) 841 goto out_release; 842 } 843 844 if (sk->sk_state != TCP_ESTABLISHED) { 845 /* Try next neighbour */ 846 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic); 847 if (rose->neighbour) 848 goto rose_try_next_neigh; 849 850 /* No more neighbours */ 851 sock->state = SS_UNCONNECTED; 852 err = sock_error(sk); /* Always set at this point */ 853 goto out_release; 854 } 855 856 sock->state = SS_CONNECTED; 857 858 out_release: 859 release_sock(sk); 860 861 return err; 862 } 863 864 static int rose_accept(struct socket *sock, struct socket *newsock, int flags) 865 { 866 struct sk_buff *skb; 867 struct sock *newsk; 868 DEFINE_WAIT(wait); 869 struct sock *sk; 870 int err = 0; 871 872 if ((sk = sock->sk) == NULL) 873 return -EINVAL; 874 875 lock_sock(sk); 876 if (sk->sk_type != SOCK_SEQPACKET) { 877 err = -EOPNOTSUPP; 878 goto out_release; 879 } 880 881 if (sk->sk_state != TCP_LISTEN) { 882 err = -EINVAL; 883 goto out_release; 884 } 885 886 /* 887 * The write queue this time is holding sockets ready to use 888 * hooked into the SABM we saved 889 */ 890 for (;;) { 891 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); 892 893 skb = skb_dequeue(&sk->sk_receive_queue); 894 if (skb) 895 break; 896 897 if (flags & O_NONBLOCK) { 898 err = -EWOULDBLOCK; 899 break; 900 } 901 if (!signal_pending(current)) { 902 release_sock(sk); 903 schedule(); 904 lock_sock(sk); 905 continue; 906 } 907 err = -ERESTARTSYS; 908 break; 909 } 910 finish_wait(sk->sk_sleep, &wait); 911 if (err) 912 goto out_release; 913 914 newsk = skb->sk; 915 newsk->sk_socket = newsock; 916 newsk->sk_sleep = &newsock->wait; 917 918 /* Now attach up the new socket */ 919 skb->sk = NULL; 920 kfree_skb(skb); 921 sk->sk_ack_backlog--; 922 newsock->sk = newsk; 923 924 out_release: 925 release_sock(sk); 926 927 return err; 928 } 929 930 static int rose_getname(struct socket *sock, struct sockaddr *uaddr, 931 int *uaddr_len, int peer) 932 { 933 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr; 934 struct sock *sk = sock->sk; 935 struct rose_sock *rose = rose_sk(sk); 936 int n; 937 938 if (peer != 0) { 939 if (sk->sk_state != TCP_ESTABLISHED) 940 return -ENOTCONN; 941 srose->srose_family = AF_ROSE; 942 srose->srose_addr = rose->dest_addr; 943 srose->srose_call = rose->dest_call; 944 srose->srose_ndigis = rose->dest_ndigis; 945 for (n = 0; n < rose->dest_ndigis; n++) 946 srose->srose_digis[n] = rose->dest_digis[n]; 947 } else { 948 srose->srose_family = AF_ROSE; 949 srose->srose_addr = rose->source_addr; 950 srose->srose_call = rose->source_call; 951 srose->srose_ndigis = rose->source_ndigis; 952 for (n = 0; n < rose->source_ndigis; n++) 953 srose->srose_digis[n] = rose->source_digis[n]; 954 } 955 956 *uaddr_len = sizeof(struct full_sockaddr_rose); 957 return 0; 958 } 959 960 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci) 961 { 962 struct sock *sk; 963 struct sock *make; 964 struct rose_sock *make_rose; 965 struct rose_facilities_struct facilities; 966 int n, len; 967 968 skb->sk = NULL; /* Initially we don't know who it's for */ 969 970 /* 971 * skb->data points to the rose frame start 972 */ 973 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct)); 974 975 len = (((skb->data[3] >> 4) & 0x0F) + 1) / 2; 976 len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2; 977 if (!rose_parse_facilities(skb->data + len + 4, &facilities)) { 978 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76); 979 return 0; 980 } 981 982 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call); 983 984 /* 985 * We can't accept the Call Request. 986 */ 987 if (sk == NULL || sk_acceptq_is_full(sk) || 988 (make = rose_make_new(sk)) == NULL) { 989 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120); 990 return 0; 991 } 992 993 skb->sk = make; 994 make->sk_state = TCP_ESTABLISHED; 995 make_rose = rose_sk(make); 996 997 make_rose->lci = lci; 998 make_rose->dest_addr = facilities.dest_addr; 999 make_rose->dest_call = facilities.dest_call; 1000 make_rose->dest_ndigis = facilities.dest_ndigis; 1001 for (n = 0 ; n < facilities.dest_ndigis ; n++) 1002 make_rose->dest_digis[n] = facilities.dest_digis[n]; 1003 make_rose->source_addr = facilities.source_addr; 1004 make_rose->source_call = facilities.source_call; 1005 make_rose->source_ndigis = facilities.source_ndigis; 1006 for (n = 0 ; n < facilities.source_ndigis ; n++) 1007 make_rose->source_digis[n]= facilities.source_digis[n]; 1008 make_rose->neighbour = neigh; 1009 make_rose->device = dev; 1010 make_rose->facilities = facilities; 1011 1012 make_rose->neighbour->use++; 1013 1014 if (rose_sk(sk)->defer) { 1015 make_rose->state = ROSE_STATE_5; 1016 } else { 1017 rose_write_internal(make, ROSE_CALL_ACCEPTED); 1018 make_rose->state = ROSE_STATE_3; 1019 rose_start_idletimer(make); 1020 } 1021 1022 make_rose->condition = 0x00; 1023 make_rose->vs = 0; 1024 make_rose->va = 0; 1025 make_rose->vr = 0; 1026 make_rose->vl = 0; 1027 sk->sk_ack_backlog++; 1028 1029 rose_insert_socket(make); 1030 1031 skb_queue_head(&sk->sk_receive_queue, skb); 1032 1033 rose_start_heartbeat(make); 1034 1035 if (!sock_flag(sk, SOCK_DEAD)) 1036 sk->sk_data_ready(sk, skb->len); 1037 1038 return 1; 1039 } 1040 1041 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock, 1042 struct msghdr *msg, size_t len) 1043 { 1044 struct sock *sk = sock->sk; 1045 struct rose_sock *rose = rose_sk(sk); 1046 struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name; 1047 int err; 1048 struct full_sockaddr_rose srose; 1049 struct sk_buff *skb; 1050 unsigned char *asmptr; 1051 int n, size, qbit = 0; 1052 1053 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) 1054 return -EINVAL; 1055 1056 if (sock_flag(sk, SOCK_ZAPPED)) 1057 return -EADDRNOTAVAIL; 1058 1059 if (sk->sk_shutdown & SEND_SHUTDOWN) { 1060 send_sig(SIGPIPE, current, 0); 1061 return -EPIPE; 1062 } 1063 1064 if (rose->neighbour == NULL || rose->device == NULL) 1065 return -ENETUNREACH; 1066 1067 if (usrose != NULL) { 1068 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose)) 1069 return -EINVAL; 1070 memset(&srose, 0, sizeof(struct full_sockaddr_rose)); 1071 memcpy(&srose, usrose, msg->msg_namelen); 1072 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 || 1073 ax25cmp(&rose->dest_call, &srose.srose_call) != 0) 1074 return -EISCONN; 1075 if (srose.srose_ndigis != rose->dest_ndigis) 1076 return -EISCONN; 1077 if (srose.srose_ndigis == rose->dest_ndigis) { 1078 for (n = 0 ; n < srose.srose_ndigis ; n++) 1079 if (ax25cmp(&rose->dest_digis[n], 1080 &srose.srose_digis[n])) 1081 return -EISCONN; 1082 } 1083 if (srose.srose_family != AF_ROSE) 1084 return -EINVAL; 1085 } else { 1086 if (sk->sk_state != TCP_ESTABLISHED) 1087 return -ENOTCONN; 1088 1089 srose.srose_family = AF_ROSE; 1090 srose.srose_addr = rose->dest_addr; 1091 srose.srose_call = rose->dest_call; 1092 srose.srose_ndigis = rose->dest_ndigis; 1093 for (n = 0 ; n < rose->dest_ndigis ; n++) 1094 srose.srose_digis[n] = rose->dest_digis[n]; 1095 } 1096 1097 SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n"); 1098 1099 /* Build a packet */ 1100 SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n"); 1101 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN; 1102 1103 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) 1104 return err; 1105 1106 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN); 1107 1108 /* 1109 * Put the data on the end 1110 */ 1111 SOCK_DEBUG(sk, "ROSE: Appending user data\n"); 1112 1113 skb_reset_transport_header(skb); 1114 skb_put(skb, len); 1115 1116 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len); 1117 if (err) { 1118 kfree_skb(skb); 1119 return err; 1120 } 1121 1122 /* 1123 * If the Q BIT Include socket option is in force, the first 1124 * byte of the user data is the logical value of the Q Bit. 1125 */ 1126 if (rose->qbitincl) { 1127 qbit = skb->data[0]; 1128 skb_pull(skb, 1); 1129 } 1130 1131 /* 1132 * Push down the ROSE header 1133 */ 1134 asmptr = skb_push(skb, ROSE_MIN_LEN); 1135 1136 SOCK_DEBUG(sk, "ROSE: Building Network Header.\n"); 1137 1138 /* Build a ROSE Network header */ 1139 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI; 1140 asmptr[1] = (rose->lci >> 0) & 0xFF; 1141 asmptr[2] = ROSE_DATA; 1142 1143 if (qbit) 1144 asmptr[0] |= ROSE_Q_BIT; 1145 1146 SOCK_DEBUG(sk, "ROSE: Built header.\n"); 1147 1148 SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n"); 1149 1150 if (sk->sk_state != TCP_ESTABLISHED) { 1151 kfree_skb(skb); 1152 return -ENOTCONN; 1153 } 1154 1155 #ifdef M_BIT 1156 #define ROSE_PACLEN (256-ROSE_MIN_LEN) 1157 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) { 1158 unsigned char header[ROSE_MIN_LEN]; 1159 struct sk_buff *skbn; 1160 int frontlen; 1161 int lg; 1162 1163 /* Save a copy of the Header */ 1164 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN); 1165 skb_pull(skb, ROSE_MIN_LEN); 1166 1167 frontlen = skb_headroom(skb); 1168 1169 while (skb->len > 0) { 1170 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) { 1171 kfree_skb(skb); 1172 return err; 1173 } 1174 1175 skbn->sk = sk; 1176 skbn->free = 1; 1177 skbn->arp = 1; 1178 1179 skb_reserve(skbn, frontlen); 1180 1181 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN; 1182 1183 /* Copy the user data */ 1184 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg); 1185 skb_pull(skb, lg); 1186 1187 /* Duplicate the Header */ 1188 skb_push(skbn, ROSE_MIN_LEN); 1189 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN); 1190 1191 if (skb->len > 0) 1192 skbn->data[2] |= M_BIT; 1193 1194 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */ 1195 } 1196 1197 skb->free = 1; 1198 kfree_skb(skb); 1199 } else { 1200 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */ 1201 } 1202 #else 1203 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */ 1204 #endif 1205 1206 rose_kick(sk); 1207 1208 return len; 1209 } 1210 1211 1212 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock, 1213 struct msghdr *msg, size_t size, int flags) 1214 { 1215 struct sock *sk = sock->sk; 1216 struct rose_sock *rose = rose_sk(sk); 1217 struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name; 1218 size_t copied; 1219 unsigned char *asmptr; 1220 struct sk_buff *skb; 1221 int n, er, qbit; 1222 1223 /* 1224 * This works for seqpacket too. The receiver has ordered the queue for 1225 * us! We do one quick check first though 1226 */ 1227 if (sk->sk_state != TCP_ESTABLISHED) 1228 return -ENOTCONN; 1229 1230 /* Now we can treat all alike */ 1231 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) 1232 return er; 1233 1234 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT; 1235 1236 skb_pull(skb, ROSE_MIN_LEN); 1237 1238 if (rose->qbitincl) { 1239 asmptr = skb_push(skb, 1); 1240 *asmptr = qbit; 1241 } 1242 1243 skb_reset_transport_header(skb); 1244 copied = skb->len; 1245 1246 if (copied > size) { 1247 copied = size; 1248 msg->msg_flags |= MSG_TRUNC; 1249 } 1250 1251 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 1252 1253 if (srose != NULL) { 1254 srose->srose_family = AF_ROSE; 1255 srose->srose_addr = rose->dest_addr; 1256 srose->srose_call = rose->dest_call; 1257 srose->srose_ndigis = rose->dest_ndigis; 1258 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) { 1259 struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name; 1260 for (n = 0 ; n < rose->dest_ndigis ; n++) 1261 full_srose->srose_digis[n] = rose->dest_digis[n]; 1262 msg->msg_namelen = sizeof(struct full_sockaddr_rose); 1263 } else { 1264 if (rose->dest_ndigis >= 1) { 1265 srose->srose_ndigis = 1; 1266 srose->srose_digi = rose->dest_digis[0]; 1267 } 1268 msg->msg_namelen = sizeof(struct sockaddr_rose); 1269 } 1270 } 1271 1272 skb_free_datagram(sk, skb); 1273 1274 return copied; 1275 } 1276 1277 1278 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1279 { 1280 struct sock *sk = sock->sk; 1281 struct rose_sock *rose = rose_sk(sk); 1282 void __user *argp = (void __user *)arg; 1283 1284 switch (cmd) { 1285 case TIOCOUTQ: { 1286 long amount; 1287 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); 1288 if (amount < 0) 1289 amount = 0; 1290 return put_user(amount, (unsigned int __user *) argp); 1291 } 1292 1293 case TIOCINQ: { 1294 struct sk_buff *skb; 1295 long amount = 0L; 1296 /* These two are safe on a single CPU system as only user tasks fiddle here */ 1297 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) 1298 amount = skb->len; 1299 return put_user(amount, (unsigned int __user *) argp); 1300 } 1301 1302 case SIOCGSTAMP: 1303 return sock_get_timestamp(sk, (struct timeval __user *) argp); 1304 1305 case SIOCGSTAMPNS: 1306 return sock_get_timestampns(sk, (struct timespec __user *) argp); 1307 1308 case SIOCGIFADDR: 1309 case SIOCSIFADDR: 1310 case SIOCGIFDSTADDR: 1311 case SIOCSIFDSTADDR: 1312 case SIOCGIFBRDADDR: 1313 case SIOCSIFBRDADDR: 1314 case SIOCGIFNETMASK: 1315 case SIOCSIFNETMASK: 1316 case SIOCGIFMETRIC: 1317 case SIOCSIFMETRIC: 1318 return -EINVAL; 1319 1320 case SIOCADDRT: 1321 case SIOCDELRT: 1322 case SIOCRSCLRRT: 1323 if (!capable(CAP_NET_ADMIN)) 1324 return -EPERM; 1325 return rose_rt_ioctl(cmd, argp); 1326 1327 case SIOCRSGCAUSE: { 1328 struct rose_cause_struct rose_cause; 1329 rose_cause.cause = rose->cause; 1330 rose_cause.diagnostic = rose->diagnostic; 1331 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0; 1332 } 1333 1334 case SIOCRSSCAUSE: { 1335 struct rose_cause_struct rose_cause; 1336 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct))) 1337 return -EFAULT; 1338 rose->cause = rose_cause.cause; 1339 rose->diagnostic = rose_cause.diagnostic; 1340 return 0; 1341 } 1342 1343 case SIOCRSSL2CALL: 1344 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1345 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1346 ax25_listen_release(&rose_callsign, NULL); 1347 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address))) 1348 return -EFAULT; 1349 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1350 return ax25_listen_register(&rose_callsign, NULL); 1351 1352 return 0; 1353 1354 case SIOCRSGL2CALL: 1355 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0; 1356 1357 case SIOCRSACCEPT: 1358 if (rose->state == ROSE_STATE_5) { 1359 rose_write_internal(sk, ROSE_CALL_ACCEPTED); 1360 rose_start_idletimer(sk); 1361 rose->condition = 0x00; 1362 rose->vs = 0; 1363 rose->va = 0; 1364 rose->vr = 0; 1365 rose->vl = 0; 1366 rose->state = ROSE_STATE_3; 1367 } 1368 return 0; 1369 1370 default: 1371 return -ENOIOCTLCMD; 1372 } 1373 1374 return 0; 1375 } 1376 1377 #ifdef CONFIG_PROC_FS 1378 static void *rose_info_start(struct seq_file *seq, loff_t *pos) 1379 { 1380 int i; 1381 struct sock *s; 1382 struct hlist_node *node; 1383 1384 spin_lock_bh(&rose_list_lock); 1385 if (*pos == 0) 1386 return SEQ_START_TOKEN; 1387 1388 i = 1; 1389 sk_for_each(s, node, &rose_list) { 1390 if (i == *pos) 1391 return s; 1392 ++i; 1393 } 1394 return NULL; 1395 } 1396 1397 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos) 1398 { 1399 ++*pos; 1400 1401 return (v == SEQ_START_TOKEN) ? sk_head(&rose_list) 1402 : sk_next((struct sock *)v); 1403 } 1404 1405 static void rose_info_stop(struct seq_file *seq, void *v) 1406 { 1407 spin_unlock_bh(&rose_list_lock); 1408 } 1409 1410 static int rose_info_show(struct seq_file *seq, void *v) 1411 { 1412 char buf[11]; 1413 1414 if (v == SEQ_START_TOKEN) 1415 seq_puts(seq, 1416 "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"); 1417 1418 else { 1419 struct sock *s = v; 1420 struct rose_sock *rose = rose_sk(s); 1421 const char *devname, *callsign; 1422 const struct net_device *dev = rose->device; 1423 1424 if (!dev) 1425 devname = "???"; 1426 else 1427 devname = dev->name; 1428 1429 seq_printf(seq, "%-10s %-9s ", 1430 rose2asc(&rose->dest_addr), 1431 ax2asc(buf, &rose->dest_call)); 1432 1433 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0) 1434 callsign = "??????-?"; 1435 else 1436 callsign = ax2asc(buf, &rose->source_call); 1437 1438 seq_printf(seq, 1439 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n", 1440 rose2asc(&rose->source_addr), 1441 callsign, 1442 devname, 1443 rose->lci & 0x0FFF, 1444 (rose->neighbour) ? rose->neighbour->number : 0, 1445 rose->state, 1446 rose->vs, 1447 rose->vr, 1448 rose->va, 1449 ax25_display_timer(&rose->timer) / HZ, 1450 rose->t1 / HZ, 1451 rose->t2 / HZ, 1452 rose->t3 / HZ, 1453 rose->hb / HZ, 1454 ax25_display_timer(&rose->idletimer) / (60 * HZ), 1455 rose->idle / (60 * HZ), 1456 atomic_read(&s->sk_wmem_alloc), 1457 atomic_read(&s->sk_rmem_alloc), 1458 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); 1459 } 1460 1461 return 0; 1462 } 1463 1464 static const struct seq_operations rose_info_seqops = { 1465 .start = rose_info_start, 1466 .next = rose_info_next, 1467 .stop = rose_info_stop, 1468 .show = rose_info_show, 1469 }; 1470 1471 static int rose_info_open(struct inode *inode, struct file *file) 1472 { 1473 return seq_open(file, &rose_info_seqops); 1474 } 1475 1476 static const struct file_operations rose_info_fops = { 1477 .owner = THIS_MODULE, 1478 .open = rose_info_open, 1479 .read = seq_read, 1480 .llseek = seq_lseek, 1481 .release = seq_release, 1482 }; 1483 #endif /* CONFIG_PROC_FS */ 1484 1485 static struct net_proto_family rose_family_ops = { 1486 .family = PF_ROSE, 1487 .create = rose_create, 1488 .owner = THIS_MODULE, 1489 }; 1490 1491 static struct proto_ops rose_proto_ops = { 1492 .family = PF_ROSE, 1493 .owner = THIS_MODULE, 1494 .release = rose_release, 1495 .bind = rose_bind, 1496 .connect = rose_connect, 1497 .socketpair = sock_no_socketpair, 1498 .accept = rose_accept, 1499 .getname = rose_getname, 1500 .poll = datagram_poll, 1501 .ioctl = rose_ioctl, 1502 .listen = rose_listen, 1503 .shutdown = sock_no_shutdown, 1504 .setsockopt = rose_setsockopt, 1505 .getsockopt = rose_getsockopt, 1506 .sendmsg = rose_sendmsg, 1507 .recvmsg = rose_recvmsg, 1508 .mmap = sock_no_mmap, 1509 .sendpage = sock_no_sendpage, 1510 }; 1511 1512 static struct notifier_block rose_dev_notifier = { 1513 .notifier_call = rose_device_event, 1514 }; 1515 1516 static struct net_device **dev_rose; 1517 1518 static struct ax25_protocol rose_pid = { 1519 .pid = AX25_P_ROSE, 1520 .func = rose_route_frame 1521 }; 1522 1523 static struct ax25_linkfail rose_linkfail_notifier = { 1524 .func = rose_link_failed 1525 }; 1526 1527 static int __init rose_proto_init(void) 1528 { 1529 int i; 1530 int rc; 1531 1532 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) { 1533 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n"); 1534 rc = -EINVAL; 1535 goto out; 1536 } 1537 1538 rc = proto_register(&rose_proto, 0); 1539 if (rc != 0) 1540 goto out; 1541 1542 rose_callsign = null_ax25_address; 1543 1544 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL); 1545 if (dev_rose == NULL) { 1546 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n"); 1547 rc = -ENOMEM; 1548 goto out_proto_unregister; 1549 } 1550 1551 for (i = 0; i < rose_ndevs; i++) { 1552 struct net_device *dev; 1553 char name[IFNAMSIZ]; 1554 1555 sprintf(name, "rose%d", i); 1556 dev = alloc_netdev(sizeof(struct net_device_stats), 1557 name, rose_setup); 1558 if (!dev) { 1559 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n"); 1560 rc = -ENOMEM; 1561 goto fail; 1562 } 1563 rc = register_netdev(dev); 1564 if (rc) { 1565 printk(KERN_ERR "ROSE: netdevice registration failed\n"); 1566 free_netdev(dev); 1567 goto fail; 1568 } 1569 lockdep_set_class(&dev->_xmit_lock, &rose_netdev_xmit_lock_key); 1570 dev_rose[i] = dev; 1571 } 1572 1573 sock_register(&rose_family_ops); 1574 register_netdevice_notifier(&rose_dev_notifier); 1575 1576 ax25_register_pid(&rose_pid); 1577 ax25_linkfail_register(&rose_linkfail_notifier); 1578 1579 #ifdef CONFIG_SYSCTL 1580 rose_register_sysctl(); 1581 #endif 1582 rose_loopback_init(); 1583 1584 rose_add_loopback_neigh(); 1585 1586 proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops); 1587 proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops); 1588 proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops); 1589 proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops); 1590 out: 1591 return rc; 1592 fail: 1593 while (--i >= 0) { 1594 unregister_netdev(dev_rose[i]); 1595 free_netdev(dev_rose[i]); 1596 } 1597 kfree(dev_rose); 1598 out_proto_unregister: 1599 proto_unregister(&rose_proto); 1600 goto out; 1601 } 1602 module_init(rose_proto_init); 1603 1604 module_param(rose_ndevs, int, 0); 1605 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices"); 1606 1607 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); 1608 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol"); 1609 MODULE_LICENSE("GPL"); 1610 MODULE_ALIAS_NETPROTO(PF_ROSE); 1611 1612 static void __exit rose_exit(void) 1613 { 1614 int i; 1615 1616 proc_net_remove(&init_net, "rose"); 1617 proc_net_remove(&init_net, "rose_neigh"); 1618 proc_net_remove(&init_net, "rose_nodes"); 1619 proc_net_remove(&init_net, "rose_routes"); 1620 rose_loopback_clear(); 1621 1622 rose_rt_free(); 1623 1624 ax25_protocol_release(AX25_P_ROSE); 1625 ax25_linkfail_release(&rose_linkfail_notifier); 1626 1627 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1628 ax25_listen_release(&rose_callsign, NULL); 1629 1630 #ifdef CONFIG_SYSCTL 1631 rose_unregister_sysctl(); 1632 #endif 1633 unregister_netdevice_notifier(&rose_dev_notifier); 1634 1635 sock_unregister(PF_ROSE); 1636 1637 for (i = 0; i < rose_ndevs; i++) { 1638 struct net_device *dev = dev_rose[i]; 1639 1640 if (dev) { 1641 unregister_netdev(dev); 1642 free_netdev(dev); 1643 } 1644 } 1645 1646 kfree(dev_rose); 1647 proto_unregister(&rose_proto); 1648 } 1649 1650 module_exit(rose_exit); 1651