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