Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * X.25 Packet Layer release 002 |
| 3 | * |
| 4 | * This is ALPHA test software. This code may break your machine, |
| 5 | * randomly fail to work with new releases, misbehave and/or generally |
| 6 | * screw up. It might even work. |
| 7 | * |
| 8 | * This code REQUIRES 2.1.15 or higher |
| 9 | * |
| 10 | * This module: |
| 11 | * This module is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public License |
| 13 | * as published by the Free Software Foundation; either version |
| 14 | * 2 of the License, or (at your option) any later version. |
| 15 | * |
| 16 | * History |
| 17 | * X.25 001 Jonathan Naylor Started coding. |
| 18 | * X.25 002 Jonathan Naylor Centralised disconnect handling. |
| 19 | * New timer architecture. |
| 20 | * 2000-03-11 Henner Eisen MSG_EOR handling more POSIX compliant. |
| 21 | * 2000-03-22 Daniela Squassoni Allowed disabling/enabling of |
| 22 | * facilities negotiation and increased |
| 23 | * the throughput upper limit. |
| 24 | * 2000-08-27 Arnaldo C. Melo s/suser/capable/ + micro cleanups |
| 25 | * 2000-09-04 Henner Eisen Set sock->state in x25_accept(). |
| 26 | * Fixed x25_output() related skb leakage. |
| 27 | * 2000-10-02 Henner Eisen Made x25_kick() single threaded per socket. |
| 28 | * 2000-10-27 Henner Eisen MSG_DONTWAIT for fragment allocation. |
| 29 | * 2000-11-14 Henner Eisen Closing datalink from NETDEV_GOING_DOWN |
| 30 | * 2002-10-06 Arnaldo C. Melo Get rid of cli/sti, move proc stuff to |
| 31 | * x25_proc.c, using seq_file |
Shaun Pereira | cb65d50 | 2005-06-22 22:15:01 -0700 | [diff] [blame] | 32 | * 2005-04-02 Shaun Pereira Selective sub address matching |
| 33 | * with call user data |
Shaun Pereira | ebc3f64 | 2005-06-22 22:16:17 -0700 | [diff] [blame] | 34 | * 2005-04-15 Shaun Pereira Fast select with no restriction on |
| 35 | * response |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | */ |
| 37 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/module.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 39 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <linux/errno.h> |
| 41 | #include <linux/kernel.h> |
| 42 | #include <linux/sched.h> |
| 43 | #include <linux/timer.h> |
| 44 | #include <linux/string.h> |
| 45 | #include <linux/net.h> |
| 46 | #include <linux/netdevice.h> |
| 47 | #include <linux/if_arp.h> |
| 48 | #include <linux/skbuff.h> |
| 49 | #include <net/sock.h> |
Arnaldo Carvalho de Melo | c752f07 | 2005-08-09 20:08:28 -0700 | [diff] [blame] | 50 | #include <net/tcp_states.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include <asm/uaccess.h> |
| 52 | #include <linux/fcntl.h> |
| 53 | #include <linux/termios.h> /* For TIOCINQ/OUTQ */ |
| 54 | #include <linux/notifier.h> |
| 55 | #include <linux/init.h> |
Shaun Pereira | 1b06e6b | 2006-03-22 00:00:12 -0800 | [diff] [blame] | 56 | #include <linux/compat.h> |
| 57 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | #include <net/x25.h> |
Shaun Pereira | 1b06e6b | 2006-03-22 00:00:12 -0800 | [diff] [blame] | 59 | #include <net/compat.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | int sysctl_x25_restart_request_timeout = X25_DEFAULT_T20; |
| 62 | int sysctl_x25_call_request_timeout = X25_DEFAULT_T21; |
| 63 | int sysctl_x25_reset_request_timeout = X25_DEFAULT_T22; |
| 64 | int sysctl_x25_clear_request_timeout = X25_DEFAULT_T23; |
| 65 | int sysctl_x25_ack_holdback_timeout = X25_DEFAULT_T2; |
| 66 | |
| 67 | HLIST_HEAD(x25_list); |
| 68 | DEFINE_RWLOCK(x25_list_lock); |
| 69 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 70 | static const struct proto_ops x25_proto_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
| 72 | static struct x25_address null_x25_address = {" "}; |
| 73 | |
Shaun Pereira | 1b06e6b | 2006-03-22 00:00:12 -0800 | [diff] [blame] | 74 | #ifdef CONFIG_COMPAT |
| 75 | struct compat_x25_subscrip_struct { |
| 76 | char device[200-sizeof(compat_ulong_t)]; |
| 77 | compat_ulong_t global_facil_mask; |
| 78 | compat_uint_t extended; |
| 79 | }; |
| 80 | #endif |
| 81 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | int x25_addr_ntoa(unsigned char *p, struct x25_address *called_addr, |
| 83 | struct x25_address *calling_addr) |
| 84 | { |
| 85 | int called_len, calling_len; |
| 86 | char *called, *calling; |
| 87 | int i; |
| 88 | |
| 89 | called_len = (*p >> 0) & 0x0F; |
| 90 | calling_len = (*p >> 4) & 0x0F; |
| 91 | |
| 92 | called = called_addr->x25_addr; |
| 93 | calling = calling_addr->x25_addr; |
| 94 | p++; |
| 95 | |
| 96 | for (i = 0; i < (called_len + calling_len); i++) { |
| 97 | if (i < called_len) { |
| 98 | if (i % 2 != 0) { |
| 99 | *called++ = ((*p >> 0) & 0x0F) + '0'; |
| 100 | p++; |
| 101 | } else { |
| 102 | *called++ = ((*p >> 4) & 0x0F) + '0'; |
| 103 | } |
| 104 | } else { |
| 105 | if (i % 2 != 0) { |
| 106 | *calling++ = ((*p >> 0) & 0x0F) + '0'; |
| 107 | p++; |
| 108 | } else { |
| 109 | *calling++ = ((*p >> 4) & 0x0F) + '0'; |
| 110 | } |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | *called = *calling = '\0'; |
| 115 | |
| 116 | return 1 + (called_len + calling_len + 1) / 2; |
| 117 | } |
| 118 | |
| 119 | int x25_addr_aton(unsigned char *p, struct x25_address *called_addr, |
| 120 | struct x25_address *calling_addr) |
| 121 | { |
| 122 | unsigned int called_len, calling_len; |
| 123 | char *called, *calling; |
| 124 | int i; |
| 125 | |
| 126 | called = called_addr->x25_addr; |
| 127 | calling = calling_addr->x25_addr; |
| 128 | |
| 129 | called_len = strlen(called); |
| 130 | calling_len = strlen(calling); |
| 131 | |
| 132 | *p++ = (calling_len << 4) | (called_len << 0); |
| 133 | |
| 134 | for (i = 0; i < (called_len + calling_len); i++) { |
| 135 | if (i < called_len) { |
| 136 | if (i % 2 != 0) { |
| 137 | *p |= (*called++ - '0') << 0; |
| 138 | p++; |
| 139 | } else { |
| 140 | *p = 0x00; |
| 141 | *p |= (*called++ - '0') << 4; |
| 142 | } |
| 143 | } else { |
| 144 | if (i % 2 != 0) { |
| 145 | *p |= (*calling++ - '0') << 0; |
| 146 | p++; |
| 147 | } else { |
| 148 | *p = 0x00; |
| 149 | *p |= (*calling++ - '0') << 4; |
| 150 | } |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | return 1 + (called_len + calling_len + 1) / 2; |
| 155 | } |
| 156 | |
| 157 | /* |
| 158 | * Socket removal during an interrupt is now safe. |
| 159 | */ |
| 160 | static void x25_remove_socket(struct sock *sk) |
| 161 | { |
| 162 | write_lock_bh(&x25_list_lock); |
| 163 | sk_del_node_init(sk); |
| 164 | write_unlock_bh(&x25_list_lock); |
| 165 | } |
| 166 | |
| 167 | /* |
| 168 | * Kill all bound sockets on a dropped device. |
| 169 | */ |
| 170 | static void x25_kill_by_device(struct net_device *dev) |
| 171 | { |
| 172 | struct sock *s; |
| 173 | struct hlist_node *node; |
| 174 | |
| 175 | write_lock_bh(&x25_list_lock); |
| 176 | |
| 177 | sk_for_each(s, node, &x25_list) |
| 178 | if (x25_sk(s)->neighbour && x25_sk(s)->neighbour->dev == dev) |
| 179 | x25_disconnect(s, ENETUNREACH, 0, 0); |
| 180 | |
| 181 | write_unlock_bh(&x25_list_lock); |
| 182 | } |
| 183 | |
| 184 | /* |
| 185 | * Handle device status changes. |
| 186 | */ |
| 187 | static int x25_device_event(struct notifier_block *this, unsigned long event, |
| 188 | void *ptr) |
| 189 | { |
| 190 | struct net_device *dev = ptr; |
| 191 | struct x25_neigh *nb; |
| 192 | |
| 193 | if (dev->type == ARPHRD_X25 |
| 194 | #if defined(CONFIG_LLC) || defined(CONFIG_LLC_MODULE) |
| 195 | || dev->type == ARPHRD_ETHER |
| 196 | #endif |
| 197 | ) { |
| 198 | switch (event) { |
| 199 | case NETDEV_UP: |
| 200 | x25_link_device_up(dev); |
| 201 | break; |
| 202 | case NETDEV_GOING_DOWN: |
| 203 | nb = x25_get_neigh(dev); |
| 204 | if (nb) { |
| 205 | x25_terminate_link(nb); |
| 206 | x25_neigh_put(nb); |
| 207 | } |
| 208 | break; |
| 209 | case NETDEV_DOWN: |
| 210 | x25_kill_by_device(dev); |
| 211 | x25_route_device_down(dev); |
| 212 | x25_link_device_down(dev); |
| 213 | break; |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | return NOTIFY_DONE; |
| 218 | } |
| 219 | |
| 220 | /* |
| 221 | * Add a socket to the bound sockets list. |
| 222 | */ |
| 223 | static void x25_insert_socket(struct sock *sk) |
| 224 | { |
| 225 | write_lock_bh(&x25_list_lock); |
| 226 | sk_add_node(sk, &x25_list); |
| 227 | write_unlock_bh(&x25_list_lock); |
| 228 | } |
| 229 | |
| 230 | /* |
| 231 | * Find a socket that wants to accept the Call Request we just |
| 232 | * received. Check the full list for an address/cud match. |
| 233 | * If no cuds match return the next_best thing, an address match. |
| 234 | * Note: if a listening socket has cud set it must only get calls |
| 235 | * with matching cud. |
| 236 | */ |
Shaun Pereira | cb65d50 | 2005-06-22 22:15:01 -0700 | [diff] [blame] | 237 | static struct sock *x25_find_listener(struct x25_address *addr, |
| 238 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | { |
| 240 | struct sock *s; |
| 241 | struct sock *next_best; |
| 242 | struct hlist_node *node; |
| 243 | |
| 244 | read_lock_bh(&x25_list_lock); |
| 245 | next_best = NULL; |
| 246 | |
| 247 | sk_for_each(s, node, &x25_list) |
| 248 | if ((!strcmp(addr->x25_addr, |
Shaun Pereira | cb65d50 | 2005-06-22 22:15:01 -0700 | [diff] [blame] | 249 | x25_sk(s)->source_addr.x25_addr) || |
| 250 | !strcmp(addr->x25_addr, |
| 251 | null_x25_address.x25_addr)) && |
| 252 | s->sk_state == TCP_LISTEN) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | /* |
| 254 | * Found a listening socket, now check the incoming |
| 255 | * call user data vs this sockets call user data |
| 256 | */ |
Shaun Pereira | cb65d50 | 2005-06-22 22:15:01 -0700 | [diff] [blame] | 257 | if(skb->len > 0 && x25_sk(s)->cudmatchlength > 0) { |
| 258 | if((memcmp(x25_sk(s)->calluserdata.cuddata, |
| 259 | skb->data, |
| 260 | x25_sk(s)->cudmatchlength)) == 0) { |
| 261 | sock_hold(s); |
| 262 | goto found; |
| 263 | } |
| 264 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | next_best = s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | } |
| 267 | if (next_best) { |
| 268 | s = next_best; |
| 269 | sock_hold(s); |
| 270 | goto found; |
| 271 | } |
| 272 | s = NULL; |
| 273 | found: |
| 274 | read_unlock_bh(&x25_list_lock); |
| 275 | return s; |
| 276 | } |
| 277 | |
| 278 | /* |
| 279 | * Find a connected X.25 socket given my LCI and neighbour. |
| 280 | */ |
| 281 | static struct sock *__x25_find_socket(unsigned int lci, struct x25_neigh *nb) |
| 282 | { |
| 283 | struct sock *s; |
| 284 | struct hlist_node *node; |
| 285 | |
| 286 | sk_for_each(s, node, &x25_list) |
| 287 | if (x25_sk(s)->lci == lci && x25_sk(s)->neighbour == nb) { |
| 288 | sock_hold(s); |
| 289 | goto found; |
| 290 | } |
| 291 | s = NULL; |
| 292 | found: |
| 293 | return s; |
| 294 | } |
| 295 | |
| 296 | struct sock *x25_find_socket(unsigned int lci, struct x25_neigh *nb) |
| 297 | { |
| 298 | struct sock *s; |
| 299 | |
| 300 | read_lock_bh(&x25_list_lock); |
| 301 | s = __x25_find_socket(lci, nb); |
| 302 | read_unlock_bh(&x25_list_lock); |
| 303 | return s; |
| 304 | } |
| 305 | |
| 306 | /* |
| 307 | * Find a unique LCI for a given device. |
| 308 | */ |
| 309 | static unsigned int x25_new_lci(struct x25_neigh *nb) |
| 310 | { |
| 311 | unsigned int lci = 1; |
| 312 | struct sock *sk; |
| 313 | |
| 314 | read_lock_bh(&x25_list_lock); |
| 315 | |
| 316 | while ((sk = __x25_find_socket(lci, nb)) != NULL) { |
| 317 | sock_put(sk); |
| 318 | if (++lci == 4096) { |
| 319 | lci = 0; |
| 320 | break; |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | read_unlock_bh(&x25_list_lock); |
| 325 | return lci; |
| 326 | } |
| 327 | |
| 328 | /* |
| 329 | * Deferred destroy. |
| 330 | */ |
| 331 | void x25_destroy_socket(struct sock *); |
| 332 | |
| 333 | /* |
| 334 | * handler for deferred kills. |
| 335 | */ |
| 336 | static void x25_destroy_timer(unsigned long data) |
| 337 | { |
| 338 | x25_destroy_socket((struct sock *)data); |
| 339 | } |
| 340 | |
| 341 | /* |
| 342 | * This is called from user mode and the timers. Thus it protects itself |
| 343 | * against interrupt users but doesn't worry about being called during |
| 344 | * work. Once it is removed from the queue no interrupt or bottom half |
| 345 | * will touch it and we are (fairly 8-) ) safe. |
| 346 | * Not static as it's used by the timer |
| 347 | */ |
| 348 | void x25_destroy_socket(struct sock *sk) |
| 349 | { |
| 350 | struct sk_buff *skb; |
| 351 | |
| 352 | sock_hold(sk); |
| 353 | lock_sock(sk); |
| 354 | x25_stop_heartbeat(sk); |
| 355 | x25_stop_timer(sk); |
| 356 | |
| 357 | x25_remove_socket(sk); |
| 358 | x25_clear_queues(sk); /* Flush the queues */ |
| 359 | |
| 360 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { |
| 361 | if (skb->sk != sk) { /* A pending connection */ |
| 362 | /* |
| 363 | * Queue the unaccepted socket for death |
| 364 | */ |
| 365 | sock_set_flag(skb->sk, SOCK_DEAD); |
| 366 | x25_start_heartbeat(skb->sk); |
| 367 | x25_sk(skb->sk)->state = X25_STATE_0; |
| 368 | } |
| 369 | |
| 370 | kfree_skb(skb); |
| 371 | } |
| 372 | |
| 373 | if (atomic_read(&sk->sk_wmem_alloc) || |
| 374 | atomic_read(&sk->sk_rmem_alloc)) { |
| 375 | /* Defer: outstanding buffers */ |
| 376 | sk->sk_timer.expires = jiffies + 10 * HZ; |
| 377 | sk->sk_timer.function = x25_destroy_timer; |
| 378 | sk->sk_timer.data = (unsigned long)sk; |
| 379 | add_timer(&sk->sk_timer); |
| 380 | } else { |
| 381 | /* drop last reference so sock_put will free */ |
| 382 | __sock_put(sk); |
| 383 | } |
| 384 | |
| 385 | release_sock(sk); |
| 386 | sock_put(sk); |
| 387 | } |
| 388 | |
| 389 | /* |
| 390 | * Handling for system calls applied via the various interfaces to a |
| 391 | * X.25 socket object. |
| 392 | */ |
| 393 | |
| 394 | static int x25_setsockopt(struct socket *sock, int level, int optname, |
| 395 | char __user *optval, int optlen) |
| 396 | { |
| 397 | int opt; |
| 398 | struct sock *sk = sock->sk; |
| 399 | int rc = -ENOPROTOOPT; |
| 400 | |
| 401 | if (level != SOL_X25 || optname != X25_QBITINCL) |
| 402 | goto out; |
| 403 | |
| 404 | rc = -EINVAL; |
| 405 | if (optlen < sizeof(int)) |
| 406 | goto out; |
| 407 | |
| 408 | rc = -EFAULT; |
| 409 | if (get_user(opt, (int __user *)optval)) |
| 410 | goto out; |
| 411 | |
| 412 | x25_sk(sk)->qbitincl = !!opt; |
| 413 | rc = 0; |
| 414 | out: |
| 415 | return rc; |
| 416 | } |
| 417 | |
| 418 | static int x25_getsockopt(struct socket *sock, int level, int optname, |
| 419 | char __user *optval, int __user *optlen) |
| 420 | { |
| 421 | struct sock *sk = sock->sk; |
| 422 | int val, len, rc = -ENOPROTOOPT; |
| 423 | |
| 424 | if (level != SOL_X25 || optname != X25_QBITINCL) |
| 425 | goto out; |
| 426 | |
| 427 | rc = -EFAULT; |
| 428 | if (get_user(len, optlen)) |
| 429 | goto out; |
| 430 | |
| 431 | len = min_t(unsigned int, len, sizeof(int)); |
| 432 | |
| 433 | rc = -EINVAL; |
| 434 | if (len < 0) |
| 435 | goto out; |
| 436 | |
| 437 | rc = -EFAULT; |
| 438 | if (put_user(len, optlen)) |
| 439 | goto out; |
| 440 | |
| 441 | val = x25_sk(sk)->qbitincl; |
| 442 | rc = copy_to_user(optval, &val, len) ? -EFAULT : 0; |
| 443 | out: |
| 444 | return rc; |
| 445 | } |
| 446 | |
| 447 | static int x25_listen(struct socket *sock, int backlog) |
| 448 | { |
| 449 | struct sock *sk = sock->sk; |
| 450 | int rc = -EOPNOTSUPP; |
| 451 | |
| 452 | if (sk->sk_state != TCP_LISTEN) { |
| 453 | memset(&x25_sk(sk)->dest_addr, 0, X25_ADDR_LEN); |
| 454 | sk->sk_max_ack_backlog = backlog; |
| 455 | sk->sk_state = TCP_LISTEN; |
| 456 | rc = 0; |
| 457 | } |
| 458 | |
| 459 | return rc; |
| 460 | } |
| 461 | |
| 462 | static struct proto x25_proto = { |
| 463 | .name = "X25", |
| 464 | .owner = THIS_MODULE, |
| 465 | .obj_size = sizeof(struct x25_sock), |
| 466 | }; |
| 467 | |
| 468 | static struct sock *x25_alloc_socket(void) |
| 469 | { |
| 470 | struct x25_sock *x25; |
| 471 | struct sock *sk = sk_alloc(AF_X25, GFP_ATOMIC, &x25_proto, 1); |
| 472 | |
| 473 | if (!sk) |
| 474 | goto out; |
| 475 | |
| 476 | sock_init_data(NULL, sk); |
| 477 | |
| 478 | x25 = x25_sk(sk); |
| 479 | skb_queue_head_init(&x25->ack_queue); |
| 480 | skb_queue_head_init(&x25->fragment_queue); |
| 481 | skb_queue_head_init(&x25->interrupt_in_queue); |
| 482 | skb_queue_head_init(&x25->interrupt_out_queue); |
| 483 | out: |
| 484 | return sk; |
| 485 | } |
| 486 | |
| 487 | void x25_init_timers(struct sock *sk); |
| 488 | |
| 489 | static int x25_create(struct socket *sock, int protocol) |
| 490 | { |
| 491 | struct sock *sk; |
| 492 | struct x25_sock *x25; |
| 493 | int rc = -ESOCKTNOSUPPORT; |
| 494 | |
| 495 | if (sock->type != SOCK_SEQPACKET || protocol) |
| 496 | goto out; |
| 497 | |
| 498 | rc = -ENOMEM; |
| 499 | if ((sk = x25_alloc_socket()) == NULL) |
| 500 | goto out; |
| 501 | |
| 502 | x25 = x25_sk(sk); |
| 503 | |
| 504 | sock_init_data(sock, sk); |
| 505 | |
| 506 | x25_init_timers(sk); |
| 507 | |
| 508 | sock->ops = &x25_proto_ops; |
| 509 | sk->sk_protocol = protocol; |
| 510 | sk->sk_backlog_rcv = x25_backlog_rcv; |
| 511 | |
| 512 | x25->t21 = sysctl_x25_call_request_timeout; |
| 513 | x25->t22 = sysctl_x25_reset_request_timeout; |
| 514 | x25->t23 = sysctl_x25_clear_request_timeout; |
| 515 | x25->t2 = sysctl_x25_ack_holdback_timeout; |
| 516 | x25->state = X25_STATE_0; |
Shaun Pereira | cb65d50 | 2005-06-22 22:15:01 -0700 | [diff] [blame] | 517 | x25->cudmatchlength = 0; |
Shaun Pereira | ebc3f64 | 2005-06-22 22:16:17 -0700 | [diff] [blame] | 518 | x25->accptapprv = X25_DENY_ACCPT_APPRV; /* normally no cud */ |
| 519 | /* on call accept */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | |
| 521 | x25->facilities.winsize_in = X25_DEFAULT_WINDOW_SIZE; |
| 522 | x25->facilities.winsize_out = X25_DEFAULT_WINDOW_SIZE; |
| 523 | x25->facilities.pacsize_in = X25_DEFAULT_PACKET_SIZE; |
| 524 | x25->facilities.pacsize_out = X25_DEFAULT_PACKET_SIZE; |
| 525 | x25->facilities.throughput = X25_DEFAULT_THROUGHPUT; |
| 526 | x25->facilities.reverse = X25_DEFAULT_REVERSE; |
Shaun Pereira | a64b7b9 | 2006-03-22 00:01:31 -0800 | [diff] [blame] | 527 | x25->dte_facilities.calling_len = 0; |
| 528 | x25->dte_facilities.called_len = 0; |
| 529 | memset(x25->dte_facilities.called_ae, '\0', |
| 530 | sizeof(x25->dte_facilities.called_ae)); |
| 531 | memset(x25->dte_facilities.calling_ae, '\0', |
| 532 | sizeof(x25->dte_facilities.calling_ae)); |
| 533 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | rc = 0; |
| 535 | out: |
| 536 | return rc; |
| 537 | } |
| 538 | |
| 539 | static struct sock *x25_make_new(struct sock *osk) |
| 540 | { |
| 541 | struct sock *sk = NULL; |
| 542 | struct x25_sock *x25, *ox25; |
| 543 | |
| 544 | if (osk->sk_type != SOCK_SEQPACKET) |
| 545 | goto out; |
| 546 | |
| 547 | if ((sk = x25_alloc_socket()) == NULL) |
| 548 | goto out; |
| 549 | |
| 550 | x25 = x25_sk(sk); |
| 551 | |
| 552 | sk->sk_type = osk->sk_type; |
| 553 | sk->sk_socket = osk->sk_socket; |
| 554 | sk->sk_priority = osk->sk_priority; |
| 555 | sk->sk_protocol = osk->sk_protocol; |
| 556 | sk->sk_rcvbuf = osk->sk_rcvbuf; |
| 557 | sk->sk_sndbuf = osk->sk_sndbuf; |
| 558 | sk->sk_state = TCP_ESTABLISHED; |
| 559 | sk->sk_sleep = osk->sk_sleep; |
| 560 | sk->sk_backlog_rcv = osk->sk_backlog_rcv; |
Shaun Pereira | a20a855 | 2006-01-06 13:11:35 -0800 | [diff] [blame] | 561 | sock_copy_flags(sk, osk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | |
| 563 | ox25 = x25_sk(osk); |
| 564 | x25->t21 = ox25->t21; |
| 565 | x25->t22 = ox25->t22; |
| 566 | x25->t23 = ox25->t23; |
| 567 | x25->t2 = ox25->t2; |
| 568 | x25->facilities = ox25->facilities; |
| 569 | x25->qbitincl = ox25->qbitincl; |
Shaun Pereira | a64b7b9 | 2006-03-22 00:01:31 -0800 | [diff] [blame] | 570 | x25->dte_facilities = ox25->dte_facilities; |
Shaun Pereira | cb65d50 | 2005-06-22 22:15:01 -0700 | [diff] [blame] | 571 | x25->cudmatchlength = ox25->cudmatchlength; |
Shaun Pereira | ebc3f64 | 2005-06-22 22:16:17 -0700 | [diff] [blame] | 572 | x25->accptapprv = ox25->accptapprv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | |
| 574 | x25_init_timers(sk); |
| 575 | out: |
| 576 | return sk; |
| 577 | } |
| 578 | |
| 579 | static int x25_release(struct socket *sock) |
| 580 | { |
| 581 | struct sock *sk = sock->sk; |
| 582 | struct x25_sock *x25; |
| 583 | |
| 584 | if (!sk) |
| 585 | goto out; |
| 586 | |
| 587 | x25 = x25_sk(sk); |
| 588 | |
| 589 | switch (x25->state) { |
| 590 | |
| 591 | case X25_STATE_0: |
| 592 | case X25_STATE_2: |
| 593 | x25_disconnect(sk, 0, 0, 0); |
| 594 | x25_destroy_socket(sk); |
| 595 | goto out; |
| 596 | |
| 597 | case X25_STATE_1: |
| 598 | case X25_STATE_3: |
| 599 | case X25_STATE_4: |
| 600 | x25_clear_queues(sk); |
| 601 | x25_write_internal(sk, X25_CLEAR_REQUEST); |
| 602 | x25_start_t23timer(sk); |
| 603 | x25->state = X25_STATE_2; |
| 604 | sk->sk_state = TCP_CLOSE; |
| 605 | sk->sk_shutdown |= SEND_SHUTDOWN; |
| 606 | sk->sk_state_change(sk); |
| 607 | sock_set_flag(sk, SOCK_DEAD); |
| 608 | sock_set_flag(sk, SOCK_DESTROY); |
| 609 | break; |
| 610 | } |
| 611 | |
| 612 | sock->sk = NULL; |
| 613 | sk->sk_socket = NULL; /* Not used, but we should do this */ |
| 614 | out: |
| 615 | return 0; |
| 616 | } |
| 617 | |
| 618 | static int x25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
| 619 | { |
| 620 | struct sock *sk = sock->sk; |
| 621 | struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr; |
| 622 | |
| 623 | if (!sock_flag(sk, SOCK_ZAPPED) || |
| 624 | addr_len != sizeof(struct sockaddr_x25) || |
| 625 | addr->sx25_family != AF_X25) |
| 626 | return -EINVAL; |
| 627 | |
| 628 | x25_sk(sk)->source_addr = addr->sx25_addr; |
| 629 | x25_insert_socket(sk); |
| 630 | sock_reset_flag(sk, SOCK_ZAPPED); |
| 631 | SOCK_DEBUG(sk, "x25_bind: socket is bound\n"); |
| 632 | |
| 633 | return 0; |
| 634 | } |
| 635 | |
| 636 | static int x25_wait_for_connection_establishment(struct sock *sk) |
| 637 | { |
| 638 | DECLARE_WAITQUEUE(wait, current); |
| 639 | int rc; |
| 640 | |
| 641 | add_wait_queue_exclusive(sk->sk_sleep, &wait); |
| 642 | for (;;) { |
| 643 | __set_current_state(TASK_INTERRUPTIBLE); |
| 644 | rc = -ERESTARTSYS; |
| 645 | if (signal_pending(current)) |
| 646 | break; |
| 647 | rc = sock_error(sk); |
| 648 | if (rc) { |
| 649 | sk->sk_socket->state = SS_UNCONNECTED; |
| 650 | break; |
| 651 | } |
| 652 | rc = 0; |
| 653 | if (sk->sk_state != TCP_ESTABLISHED) { |
| 654 | release_sock(sk); |
| 655 | schedule(); |
| 656 | lock_sock(sk); |
| 657 | } else |
| 658 | break; |
| 659 | } |
| 660 | __set_current_state(TASK_RUNNING); |
| 661 | remove_wait_queue(sk->sk_sleep, &wait); |
| 662 | return rc; |
| 663 | } |
| 664 | |
| 665 | static int x25_connect(struct socket *sock, struct sockaddr *uaddr, |
| 666 | int addr_len, int flags) |
| 667 | { |
| 668 | struct sock *sk = sock->sk; |
| 669 | struct x25_sock *x25 = x25_sk(sk); |
| 670 | struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr; |
| 671 | struct x25_route *rt; |
| 672 | int rc = 0; |
| 673 | |
| 674 | lock_sock(sk); |
| 675 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { |
| 676 | sock->state = SS_CONNECTED; |
| 677 | goto out; /* Connect completed during a ERESTARTSYS event */ |
| 678 | } |
| 679 | |
| 680 | rc = -ECONNREFUSED; |
| 681 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { |
| 682 | sock->state = SS_UNCONNECTED; |
| 683 | goto out; |
| 684 | } |
| 685 | |
| 686 | rc = -EISCONN; /* No reconnect on a seqpacket socket */ |
| 687 | if (sk->sk_state == TCP_ESTABLISHED) |
| 688 | goto out; |
| 689 | |
| 690 | sk->sk_state = TCP_CLOSE; |
| 691 | sock->state = SS_UNCONNECTED; |
| 692 | |
| 693 | rc = -EINVAL; |
| 694 | if (addr_len != sizeof(struct sockaddr_x25) || |
| 695 | addr->sx25_family != AF_X25) |
| 696 | goto out; |
| 697 | |
| 698 | rc = -ENETUNREACH; |
| 699 | rt = x25_get_route(&addr->sx25_addr); |
| 700 | if (!rt) |
| 701 | goto out; |
| 702 | |
| 703 | x25->neighbour = x25_get_neigh(rt->dev); |
| 704 | if (!x25->neighbour) |
| 705 | goto out_put_route; |
| 706 | |
| 707 | x25_limit_facilities(&x25->facilities, x25->neighbour); |
| 708 | |
| 709 | x25->lci = x25_new_lci(x25->neighbour); |
| 710 | if (!x25->lci) |
| 711 | goto out_put_neigh; |
| 712 | |
| 713 | rc = -EINVAL; |
| 714 | if (sock_flag(sk, SOCK_ZAPPED)) /* Must bind first - autobinding does not work */ |
| 715 | goto out_put_neigh; |
| 716 | |
| 717 | if (!strcmp(x25->source_addr.x25_addr, null_x25_address.x25_addr)) |
| 718 | memset(&x25->source_addr, '\0', X25_ADDR_LEN); |
| 719 | |
| 720 | x25->dest_addr = addr->sx25_addr; |
| 721 | |
| 722 | /* Move to connecting socket, start sending Connect Requests */ |
| 723 | sock->state = SS_CONNECTING; |
| 724 | sk->sk_state = TCP_SYN_SENT; |
| 725 | |
| 726 | x25->state = X25_STATE_1; |
| 727 | |
| 728 | x25_write_internal(sk, X25_CALL_REQUEST); |
| 729 | |
| 730 | x25_start_heartbeat(sk); |
| 731 | x25_start_t21timer(sk); |
| 732 | |
| 733 | /* Now the loop */ |
| 734 | rc = -EINPROGRESS; |
| 735 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) |
| 736 | goto out_put_neigh; |
| 737 | |
| 738 | rc = x25_wait_for_connection_establishment(sk); |
| 739 | if (rc) |
| 740 | goto out_put_neigh; |
| 741 | |
| 742 | sock->state = SS_CONNECTED; |
| 743 | rc = 0; |
| 744 | out_put_neigh: |
| 745 | if (rc) |
| 746 | x25_neigh_put(x25->neighbour); |
| 747 | out_put_route: |
| 748 | x25_route_put(rt); |
| 749 | out: |
| 750 | release_sock(sk); |
| 751 | return rc; |
| 752 | } |
| 753 | |
Shaun Pereira | bac37ec | 2006-03-22 00:00:40 -0800 | [diff] [blame] | 754 | static int x25_wait_for_data(struct sock *sk, long timeout) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | { |
| 756 | DECLARE_WAITQUEUE(wait, current); |
| 757 | int rc = 0; |
| 758 | |
| 759 | add_wait_queue_exclusive(sk->sk_sleep, &wait); |
| 760 | for (;;) { |
| 761 | __set_current_state(TASK_INTERRUPTIBLE); |
| 762 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
| 763 | break; |
| 764 | rc = -ERESTARTSYS; |
| 765 | if (signal_pending(current)) |
| 766 | break; |
| 767 | rc = -EAGAIN; |
| 768 | if (!timeout) |
| 769 | break; |
| 770 | rc = 0; |
| 771 | if (skb_queue_empty(&sk->sk_receive_queue)) { |
| 772 | release_sock(sk); |
| 773 | timeout = schedule_timeout(timeout); |
| 774 | lock_sock(sk); |
| 775 | } else |
| 776 | break; |
| 777 | } |
| 778 | __set_current_state(TASK_RUNNING); |
| 779 | remove_wait_queue(sk->sk_sleep, &wait); |
| 780 | return rc; |
| 781 | } |
| 782 | |
| 783 | static int x25_accept(struct socket *sock, struct socket *newsock, int flags) |
| 784 | { |
| 785 | struct sock *sk = sock->sk; |
| 786 | struct sock *newsk; |
| 787 | struct sk_buff *skb; |
| 788 | int rc = -EINVAL; |
| 789 | |
| 790 | if (!sk || sk->sk_state != TCP_LISTEN) |
| 791 | goto out; |
| 792 | |
| 793 | rc = -EOPNOTSUPP; |
| 794 | if (sk->sk_type != SOCK_SEQPACKET) |
| 795 | goto out; |
| 796 | |
| 797 | lock_sock(sk); |
| 798 | rc = x25_wait_for_data(sk, sk->sk_rcvtimeo); |
| 799 | if (rc) |
| 800 | goto out2; |
| 801 | skb = skb_dequeue(&sk->sk_receive_queue); |
| 802 | rc = -EINVAL; |
| 803 | if (!skb->sk) |
| 804 | goto out2; |
| 805 | newsk = skb->sk; |
| 806 | newsk->sk_socket = newsock; |
| 807 | newsk->sk_sleep = &newsock->wait; |
| 808 | |
| 809 | /* Now attach up the new socket */ |
| 810 | skb->sk = NULL; |
| 811 | kfree_skb(skb); |
| 812 | sk->sk_ack_backlog--; |
| 813 | newsock->sk = newsk; |
| 814 | newsock->state = SS_CONNECTED; |
| 815 | rc = 0; |
| 816 | out2: |
| 817 | release_sock(sk); |
| 818 | out: |
| 819 | return rc; |
| 820 | } |
| 821 | |
| 822 | static int x25_getname(struct socket *sock, struct sockaddr *uaddr, |
| 823 | int *uaddr_len, int peer) |
| 824 | { |
| 825 | struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)uaddr; |
| 826 | struct sock *sk = sock->sk; |
| 827 | struct x25_sock *x25 = x25_sk(sk); |
| 828 | |
| 829 | if (peer) { |
| 830 | if (sk->sk_state != TCP_ESTABLISHED) |
| 831 | return -ENOTCONN; |
| 832 | sx25->sx25_addr = x25->dest_addr; |
| 833 | } else |
| 834 | sx25->sx25_addr = x25->source_addr; |
| 835 | |
| 836 | sx25->sx25_family = AF_X25; |
| 837 | *uaddr_len = sizeof(*sx25); |
| 838 | |
| 839 | return 0; |
| 840 | } |
| 841 | |
| 842 | int x25_rx_call_request(struct sk_buff *skb, struct x25_neigh *nb, |
| 843 | unsigned int lci) |
| 844 | { |
| 845 | struct sock *sk; |
| 846 | struct sock *make; |
| 847 | struct x25_sock *makex25; |
| 848 | struct x25_address source_addr, dest_addr; |
| 849 | struct x25_facilities facilities; |
Shaun Pereira | a64b7b9 | 2006-03-22 00:01:31 -0800 | [diff] [blame] | 850 | struct x25_dte_facilities dte_facilities; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | int len, rc; |
| 852 | |
| 853 | /* |
| 854 | * Remove the LCI and frame type. |
| 855 | */ |
| 856 | skb_pull(skb, X25_STD_MIN_LEN); |
| 857 | |
| 858 | /* |
| 859 | * Extract the X.25 addresses and convert them to ASCII strings, |
| 860 | * and remove them. |
| 861 | */ |
| 862 | skb_pull(skb, x25_addr_ntoa(skb->data, &source_addr, &dest_addr)); |
| 863 | |
| 864 | /* |
| 865 | * Get the length of the facilities, skip past them for the moment |
| 866 | * get the call user data because this is needed to determine |
| 867 | * the correct listener |
| 868 | */ |
| 869 | len = skb->data[0] + 1; |
| 870 | skb_pull(skb,len); |
| 871 | |
| 872 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | * Find a listener for the particular address/cud pair. |
| 874 | */ |
Shaun Pereira | cb65d50 | 2005-06-22 22:15:01 -0700 | [diff] [blame] | 875 | sk = x25_find_listener(&source_addr,skb); |
| 876 | skb_push(skb,len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | |
| 878 | /* |
| 879 | * We can't accept the Call Request. |
| 880 | */ |
| 881 | if (sk == NULL || sk_acceptq_is_full(sk)) |
| 882 | goto out_clear_request; |
| 883 | |
| 884 | /* |
| 885 | * Try to reach a compromise on the requested facilities. |
| 886 | */ |
Shaun Pereira | a64b7b9 | 2006-03-22 00:01:31 -0800 | [diff] [blame] | 887 | len = x25_negotiate_facilities(skb, sk, &facilities, &dte_facilities); |
| 888 | if (len == -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | goto out_sock_put; |
| 890 | |
| 891 | /* |
| 892 | * current neighbour/link might impose additional limits |
| 893 | * on certain facilties |
| 894 | */ |
| 895 | |
| 896 | x25_limit_facilities(&facilities, nb); |
| 897 | |
| 898 | /* |
| 899 | * Try to create a new socket. |
| 900 | */ |
| 901 | make = x25_make_new(sk); |
| 902 | if (!make) |
| 903 | goto out_sock_put; |
| 904 | |
| 905 | /* |
| 906 | * Remove the facilities |
| 907 | */ |
| 908 | skb_pull(skb, len); |
| 909 | |
| 910 | skb->sk = make; |
| 911 | make->sk_state = TCP_ESTABLISHED; |
| 912 | |
| 913 | makex25 = x25_sk(make); |
| 914 | makex25->lci = lci; |
| 915 | makex25->dest_addr = dest_addr; |
| 916 | makex25->source_addr = source_addr; |
| 917 | makex25->neighbour = nb; |
| 918 | makex25->facilities = facilities; |
Shaun Pereira | a64b7b9 | 2006-03-22 00:01:31 -0800 | [diff] [blame] | 919 | makex25->dte_facilities= dte_facilities; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | makex25->vc_facil_mask = x25_sk(sk)->vc_facil_mask; |
Shaun Pereira | cb65d50 | 2005-06-22 22:15:01 -0700 | [diff] [blame] | 921 | /* ensure no reverse facil on accept */ |
| 922 | makex25->vc_facil_mask &= ~X25_MASK_REVERSE; |
Shaun Pereira | a64b7b9 | 2006-03-22 00:01:31 -0800 | [diff] [blame] | 923 | /* ensure no calling address extension on accept */ |
| 924 | makex25->vc_facil_mask &= ~X25_MASK_CALLING_AE; |
Shaun Pereira | cb65d50 | 2005-06-22 22:15:01 -0700 | [diff] [blame] | 925 | makex25->cudmatchlength = x25_sk(sk)->cudmatchlength; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | |
Shaun Pereira | ebc3f64 | 2005-06-22 22:16:17 -0700 | [diff] [blame] | 927 | /* Normally all calls are accepted immediatly */ |
| 928 | if(makex25->accptapprv & X25_DENY_ACCPT_APPRV) { |
| 929 | x25_write_internal(make, X25_CALL_ACCEPTED); |
| 930 | makex25->state = X25_STATE_3; |
| 931 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | |
Shaun Pereira | cb65d50 | 2005-06-22 22:15:01 -0700 | [diff] [blame] | 933 | /* |
| 934 | * Incoming Call User Data. |
| 935 | */ |
| 936 | if (skb->len >= 0) { |
| 937 | memcpy(makex25->calluserdata.cuddata, skb->data, skb->len); |
| 938 | makex25->calluserdata.cudlength = skb->len; |
| 939 | } |
| 940 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | sk->sk_ack_backlog++; |
| 942 | |
| 943 | x25_insert_socket(make); |
| 944 | |
| 945 | skb_queue_head(&sk->sk_receive_queue, skb); |
| 946 | |
| 947 | x25_start_heartbeat(make); |
| 948 | |
| 949 | if (!sock_flag(sk, SOCK_DEAD)) |
| 950 | sk->sk_data_ready(sk, skb->len); |
| 951 | rc = 1; |
| 952 | sock_put(sk); |
| 953 | out: |
| 954 | return rc; |
| 955 | out_sock_put: |
| 956 | sock_put(sk); |
| 957 | out_clear_request: |
| 958 | rc = 0; |
| 959 | x25_transmit_clear_request(nb, lci, 0x01); |
| 960 | goto out; |
| 961 | } |
| 962 | |
| 963 | static int x25_sendmsg(struct kiocb *iocb, struct socket *sock, |
| 964 | struct msghdr *msg, size_t len) |
| 965 | { |
| 966 | struct sock *sk = sock->sk; |
| 967 | struct x25_sock *x25 = x25_sk(sk); |
| 968 | struct sockaddr_x25 *usx25 = (struct sockaddr_x25 *)msg->msg_name; |
| 969 | struct sockaddr_x25 sx25; |
| 970 | struct sk_buff *skb; |
| 971 | unsigned char *asmptr; |
| 972 | int noblock = msg->msg_flags & MSG_DONTWAIT; |
| 973 | size_t size; |
| 974 | int qbit = 0, rc = -EINVAL; |
| 975 | |
| 976 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_OOB|MSG_EOR|MSG_CMSG_COMPAT)) |
| 977 | goto out; |
| 978 | |
| 979 | /* we currently don't support segmented records at the user interface */ |
| 980 | if (!(msg->msg_flags & (MSG_EOR|MSG_OOB))) |
| 981 | goto out; |
| 982 | |
| 983 | rc = -EADDRNOTAVAIL; |
| 984 | if (sock_flag(sk, SOCK_ZAPPED)) |
| 985 | goto out; |
| 986 | |
| 987 | rc = -EPIPE; |
| 988 | if (sk->sk_shutdown & SEND_SHUTDOWN) { |
| 989 | send_sig(SIGPIPE, current, 0); |
| 990 | goto out; |
| 991 | } |
| 992 | |
| 993 | rc = -ENETUNREACH; |
| 994 | if (!x25->neighbour) |
| 995 | goto out; |
| 996 | |
| 997 | if (usx25) { |
| 998 | rc = -EINVAL; |
| 999 | if (msg->msg_namelen < sizeof(sx25)) |
| 1000 | goto out; |
| 1001 | memcpy(&sx25, usx25, sizeof(sx25)); |
| 1002 | rc = -EISCONN; |
| 1003 | if (strcmp(x25->dest_addr.x25_addr, sx25.sx25_addr.x25_addr)) |
| 1004 | goto out; |
| 1005 | rc = -EINVAL; |
| 1006 | if (sx25.sx25_family != AF_X25) |
| 1007 | goto out; |
| 1008 | } else { |
| 1009 | /* |
| 1010 | * FIXME 1003.1g - if the socket is like this because |
| 1011 | * it has become closed (not started closed) we ought |
| 1012 | * to SIGPIPE, EPIPE; |
| 1013 | */ |
| 1014 | rc = -ENOTCONN; |
| 1015 | if (sk->sk_state != TCP_ESTABLISHED) |
| 1016 | goto out; |
| 1017 | |
| 1018 | sx25.sx25_family = AF_X25; |
| 1019 | sx25.sx25_addr = x25->dest_addr; |
| 1020 | } |
| 1021 | |
| 1022 | SOCK_DEBUG(sk, "x25_sendmsg: sendto: Addresses built.\n"); |
| 1023 | |
| 1024 | /* Build a packet */ |
| 1025 | SOCK_DEBUG(sk, "x25_sendmsg: sendto: building packet.\n"); |
| 1026 | |
| 1027 | if ((msg->msg_flags & MSG_OOB) && len > 32) |
| 1028 | len = 32; |
| 1029 | |
| 1030 | size = len + X25_MAX_L2_LEN + X25_EXT_MIN_LEN; |
| 1031 | |
| 1032 | skb = sock_alloc_send_skb(sk, size, noblock, &rc); |
| 1033 | if (!skb) |
| 1034 | goto out; |
| 1035 | X25_SKB_CB(skb)->flags = msg->msg_flags; |
| 1036 | |
| 1037 | skb_reserve(skb, X25_MAX_L2_LEN + X25_EXT_MIN_LEN); |
| 1038 | |
| 1039 | /* |
| 1040 | * Put the data on the end |
| 1041 | */ |
| 1042 | SOCK_DEBUG(sk, "x25_sendmsg: Copying user data\n"); |
| 1043 | |
| 1044 | asmptr = skb->h.raw = skb_put(skb, len); |
| 1045 | |
| 1046 | rc = memcpy_fromiovec(asmptr, msg->msg_iov, len); |
| 1047 | if (rc) |
| 1048 | goto out_kfree_skb; |
| 1049 | |
| 1050 | /* |
| 1051 | * If the Q BIT Include socket option is in force, the first |
| 1052 | * byte of the user data is the logical value of the Q Bit. |
| 1053 | */ |
| 1054 | if (x25->qbitincl) { |
| 1055 | qbit = skb->data[0]; |
| 1056 | skb_pull(skb, 1); |
| 1057 | } |
| 1058 | |
| 1059 | /* |
| 1060 | * Push down the X.25 header |
| 1061 | */ |
| 1062 | SOCK_DEBUG(sk, "x25_sendmsg: Building X.25 Header.\n"); |
| 1063 | |
| 1064 | if (msg->msg_flags & MSG_OOB) { |
| 1065 | if (x25->neighbour->extended) { |
| 1066 | asmptr = skb_push(skb, X25_STD_MIN_LEN); |
| 1067 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ; |
| 1068 | *asmptr++ = (x25->lci >> 0) & 0xFF; |
| 1069 | *asmptr++ = X25_INTERRUPT; |
| 1070 | } else { |
| 1071 | asmptr = skb_push(skb, X25_STD_MIN_LEN); |
| 1072 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ; |
| 1073 | *asmptr++ = (x25->lci >> 0) & 0xFF; |
| 1074 | *asmptr++ = X25_INTERRUPT; |
| 1075 | } |
| 1076 | } else { |
| 1077 | if (x25->neighbour->extended) { |
| 1078 | /* Build an Extended X.25 header */ |
| 1079 | asmptr = skb_push(skb, X25_EXT_MIN_LEN); |
| 1080 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_EXTSEQ; |
| 1081 | *asmptr++ = (x25->lci >> 0) & 0xFF; |
| 1082 | *asmptr++ = X25_DATA; |
| 1083 | *asmptr++ = X25_DATA; |
| 1084 | } else { |
| 1085 | /* Build an Standard X.25 header */ |
| 1086 | asmptr = skb_push(skb, X25_STD_MIN_LEN); |
| 1087 | *asmptr++ = ((x25->lci >> 8) & 0x0F) | X25_GFI_STDSEQ; |
| 1088 | *asmptr++ = (x25->lci >> 0) & 0xFF; |
| 1089 | *asmptr++ = X25_DATA; |
| 1090 | } |
| 1091 | |
| 1092 | if (qbit) |
| 1093 | skb->data[0] |= X25_Q_BIT; |
| 1094 | } |
| 1095 | |
| 1096 | SOCK_DEBUG(sk, "x25_sendmsg: Built header.\n"); |
| 1097 | SOCK_DEBUG(sk, "x25_sendmsg: Transmitting buffer\n"); |
| 1098 | |
| 1099 | rc = -ENOTCONN; |
| 1100 | if (sk->sk_state != TCP_ESTABLISHED) |
| 1101 | goto out_kfree_skb; |
| 1102 | |
| 1103 | if (msg->msg_flags & MSG_OOB) |
| 1104 | skb_queue_tail(&x25->interrupt_out_queue, skb); |
| 1105 | else { |
| 1106 | len = x25_output(sk, skb); |
| 1107 | if (len < 0) |
| 1108 | kfree_skb(skb); |
| 1109 | else if (x25->qbitincl) |
| 1110 | len++; |
| 1111 | } |
| 1112 | |
| 1113 | /* |
| 1114 | * lock_sock() is currently only used to serialize this x25_kick() |
| 1115 | * against input-driven x25_kick() calls. It currently only blocks |
| 1116 | * incoming packets for this socket and does not protect against |
| 1117 | * any other socket state changes and is not called from anywhere |
| 1118 | * else. As x25_kick() cannot block and as long as all socket |
| 1119 | * operations are BKL-wrapped, we don't need take to care about |
| 1120 | * purging the backlog queue in x25_release(). |
| 1121 | * |
| 1122 | * Using lock_sock() to protect all socket operations entirely |
| 1123 | * (and making the whole x25 stack SMP aware) unfortunately would |
| 1124 | * require major changes to {send,recv}msg and skb allocation methods. |
| 1125 | * -> 2.5 ;) |
| 1126 | */ |
| 1127 | lock_sock(sk); |
| 1128 | x25_kick(sk); |
| 1129 | release_sock(sk); |
| 1130 | rc = len; |
| 1131 | out: |
| 1132 | return rc; |
| 1133 | out_kfree_skb: |
| 1134 | kfree_skb(skb); |
| 1135 | goto out; |
| 1136 | } |
| 1137 | |
| 1138 | |
| 1139 | static int x25_recvmsg(struct kiocb *iocb, struct socket *sock, |
| 1140 | struct msghdr *msg, size_t size, |
| 1141 | int flags) |
| 1142 | { |
| 1143 | struct sock *sk = sock->sk; |
| 1144 | struct x25_sock *x25 = x25_sk(sk); |
| 1145 | struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name; |
| 1146 | size_t copied; |
| 1147 | int qbit; |
| 1148 | struct sk_buff *skb; |
| 1149 | unsigned char *asmptr; |
| 1150 | int rc = -ENOTCONN; |
| 1151 | |
| 1152 | /* |
| 1153 | * This works for seqpacket too. The receiver has ordered the queue for |
| 1154 | * us! We do one quick check first though |
| 1155 | */ |
| 1156 | if (sk->sk_state != TCP_ESTABLISHED) |
| 1157 | goto out; |
| 1158 | |
| 1159 | if (flags & MSG_OOB) { |
| 1160 | rc = -EINVAL; |
| 1161 | if (sock_flag(sk, SOCK_URGINLINE) || |
| 1162 | !skb_peek(&x25->interrupt_in_queue)) |
| 1163 | goto out; |
| 1164 | |
| 1165 | skb = skb_dequeue(&x25->interrupt_in_queue); |
| 1166 | |
| 1167 | skb_pull(skb, X25_STD_MIN_LEN); |
| 1168 | |
| 1169 | /* |
| 1170 | * No Q bit information on Interrupt data. |
| 1171 | */ |
| 1172 | if (x25->qbitincl) { |
| 1173 | asmptr = skb_push(skb, 1); |
| 1174 | *asmptr = 0x00; |
| 1175 | } |
| 1176 | |
| 1177 | msg->msg_flags |= MSG_OOB; |
| 1178 | } else { |
| 1179 | /* Now we can treat all alike */ |
| 1180 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, |
| 1181 | flags & MSG_DONTWAIT, &rc); |
| 1182 | if (!skb) |
| 1183 | goto out; |
| 1184 | |
| 1185 | qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT; |
| 1186 | |
| 1187 | skb_pull(skb, x25->neighbour->extended ? |
| 1188 | X25_EXT_MIN_LEN : X25_STD_MIN_LEN); |
| 1189 | |
| 1190 | if (x25->qbitincl) { |
| 1191 | asmptr = skb_push(skb, 1); |
| 1192 | *asmptr = qbit; |
| 1193 | } |
| 1194 | } |
| 1195 | |
| 1196 | skb->h.raw = skb->data; |
| 1197 | |
| 1198 | copied = skb->len; |
| 1199 | |
| 1200 | if (copied > size) { |
| 1201 | copied = size; |
| 1202 | msg->msg_flags |= MSG_TRUNC; |
| 1203 | } |
| 1204 | |
| 1205 | /* Currently, each datagram always contains a complete record */ |
| 1206 | msg->msg_flags |= MSG_EOR; |
| 1207 | |
| 1208 | rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
| 1209 | if (rc) |
| 1210 | goto out_free_dgram; |
| 1211 | |
| 1212 | if (sx25) { |
| 1213 | sx25->sx25_family = AF_X25; |
| 1214 | sx25->sx25_addr = x25->dest_addr; |
| 1215 | } |
| 1216 | |
| 1217 | msg->msg_namelen = sizeof(struct sockaddr_x25); |
| 1218 | |
| 1219 | lock_sock(sk); |
| 1220 | x25_check_rbuf(sk); |
| 1221 | release_sock(sk); |
| 1222 | rc = copied; |
| 1223 | out_free_dgram: |
| 1224 | skb_free_datagram(sk, skb); |
| 1225 | out: |
| 1226 | return rc; |
| 1227 | } |
| 1228 | |
| 1229 | |
| 1230 | static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| 1231 | { |
| 1232 | struct sock *sk = sock->sk; |
| 1233 | struct x25_sock *x25 = x25_sk(sk); |
| 1234 | void __user *argp = (void __user *)arg; |
| 1235 | int rc; |
| 1236 | |
| 1237 | switch (cmd) { |
| 1238 | case TIOCOUTQ: { |
| 1239 | int amount = sk->sk_sndbuf - |
| 1240 | atomic_read(&sk->sk_wmem_alloc); |
| 1241 | if (amount < 0) |
| 1242 | amount = 0; |
| 1243 | rc = put_user(amount, (unsigned int __user *)argp); |
| 1244 | break; |
| 1245 | } |
| 1246 | |
| 1247 | case TIOCINQ: { |
| 1248 | struct sk_buff *skb; |
| 1249 | int amount = 0; |
| 1250 | /* |
| 1251 | * These two are safe on a single CPU system as |
| 1252 | * only user tasks fiddle here |
| 1253 | */ |
| 1254 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) |
| 1255 | amount = skb->len; |
| 1256 | rc = put_user(amount, (unsigned int __user *)argp); |
| 1257 | break; |
| 1258 | } |
| 1259 | |
| 1260 | case SIOCGSTAMP: |
| 1261 | rc = -EINVAL; |
| 1262 | if (sk) |
| 1263 | rc = sock_get_timestamp(sk, |
| 1264 | (struct timeval __user *)argp); |
| 1265 | break; |
| 1266 | case SIOCGIFADDR: |
| 1267 | case SIOCSIFADDR: |
| 1268 | case SIOCGIFDSTADDR: |
| 1269 | case SIOCSIFDSTADDR: |
| 1270 | case SIOCGIFBRDADDR: |
| 1271 | case SIOCSIFBRDADDR: |
| 1272 | case SIOCGIFNETMASK: |
| 1273 | case SIOCSIFNETMASK: |
| 1274 | case SIOCGIFMETRIC: |
| 1275 | case SIOCSIFMETRIC: |
| 1276 | rc = -EINVAL; |
| 1277 | break; |
| 1278 | case SIOCADDRT: |
| 1279 | case SIOCDELRT: |
| 1280 | rc = -EPERM; |
| 1281 | if (!capable(CAP_NET_ADMIN)) |
| 1282 | break; |
| 1283 | rc = x25_route_ioctl(cmd, argp); |
| 1284 | break; |
| 1285 | case SIOCX25GSUBSCRIP: |
| 1286 | rc = x25_subscr_ioctl(cmd, argp); |
| 1287 | break; |
| 1288 | case SIOCX25SSUBSCRIP: |
| 1289 | rc = -EPERM; |
| 1290 | if (!capable(CAP_NET_ADMIN)) |
| 1291 | break; |
| 1292 | rc = x25_subscr_ioctl(cmd, argp); |
| 1293 | break; |
| 1294 | case SIOCX25GFACILITIES: { |
| 1295 | struct x25_facilities fac = x25->facilities; |
| 1296 | rc = copy_to_user(argp, &fac, |
| 1297 | sizeof(fac)) ? -EFAULT : 0; |
| 1298 | break; |
| 1299 | } |
| 1300 | |
| 1301 | case SIOCX25SFACILITIES: { |
| 1302 | struct x25_facilities facilities; |
| 1303 | rc = -EFAULT; |
| 1304 | if (copy_from_user(&facilities, argp, |
| 1305 | sizeof(facilities))) |
| 1306 | break; |
| 1307 | rc = -EINVAL; |
| 1308 | if (sk->sk_state != TCP_LISTEN && |
| 1309 | sk->sk_state != TCP_CLOSE) |
| 1310 | break; |
| 1311 | if (facilities.pacsize_in < X25_PS16 || |
| 1312 | facilities.pacsize_in > X25_PS4096) |
| 1313 | break; |
| 1314 | if (facilities.pacsize_out < X25_PS16 || |
| 1315 | facilities.pacsize_out > X25_PS4096) |
| 1316 | break; |
| 1317 | if (facilities.winsize_in < 1 || |
| 1318 | facilities.winsize_in > 127) |
| 1319 | break; |
| 1320 | if (facilities.throughput < 0x03 || |
| 1321 | facilities.throughput > 0xDD) |
| 1322 | break; |
Shaun Pereira | ebc3f64 | 2005-06-22 22:16:17 -0700 | [diff] [blame] | 1323 | if (facilities.reverse && |
| 1324 | (facilities.reverse | 0x81)!= 0x81) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | break; |
| 1326 | x25->facilities = facilities; |
| 1327 | rc = 0; |
| 1328 | break; |
| 1329 | } |
| 1330 | |
Shaun Pereira | a64b7b9 | 2006-03-22 00:01:31 -0800 | [diff] [blame] | 1331 | case SIOCX25GDTEFACILITIES: { |
| 1332 | rc = copy_to_user(argp, &x25->dte_facilities, |
| 1333 | sizeof(x25->dte_facilities)); |
| 1334 | if (rc) |
| 1335 | rc = -EFAULT; |
| 1336 | break; |
| 1337 | } |
| 1338 | |
| 1339 | case SIOCX25SDTEFACILITIES: { |
| 1340 | struct x25_dte_facilities dtefacs; |
| 1341 | rc = -EFAULT; |
| 1342 | if (copy_from_user(&dtefacs, argp, sizeof(dtefacs))) |
| 1343 | break; |
| 1344 | rc = -EINVAL; |
| 1345 | if (sk->sk_state != TCP_LISTEN && |
| 1346 | sk->sk_state != TCP_CLOSE) |
| 1347 | break; |
| 1348 | if (dtefacs.calling_len > X25_MAX_AE_LEN) |
| 1349 | break; |
| 1350 | if (dtefacs.calling_ae == NULL) |
| 1351 | break; |
| 1352 | if (dtefacs.called_len > X25_MAX_AE_LEN) |
| 1353 | break; |
| 1354 | if (dtefacs.called_ae == NULL) |
| 1355 | break; |
| 1356 | x25->dte_facilities = dtefacs; |
| 1357 | rc = 0; |
| 1358 | break; |
| 1359 | } |
| 1360 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | case SIOCX25GCALLUSERDATA: { |
| 1362 | struct x25_calluserdata cud = x25->calluserdata; |
| 1363 | rc = copy_to_user(argp, &cud, |
| 1364 | sizeof(cud)) ? -EFAULT : 0; |
| 1365 | break; |
| 1366 | } |
| 1367 | |
| 1368 | case SIOCX25SCALLUSERDATA: { |
| 1369 | struct x25_calluserdata calluserdata; |
| 1370 | |
| 1371 | rc = -EFAULT; |
| 1372 | if (copy_from_user(&calluserdata, argp, |
| 1373 | sizeof(calluserdata))) |
| 1374 | break; |
| 1375 | rc = -EINVAL; |
| 1376 | if (calluserdata.cudlength > X25_MAX_CUD_LEN) |
| 1377 | break; |
| 1378 | x25->calluserdata = calluserdata; |
| 1379 | rc = 0; |
| 1380 | break; |
| 1381 | } |
| 1382 | |
| 1383 | case SIOCX25GCAUSEDIAG: { |
| 1384 | struct x25_causediag causediag; |
| 1385 | causediag = x25->causediag; |
| 1386 | rc = copy_to_user(argp, &causediag, |
| 1387 | sizeof(causediag)) ? -EFAULT : 0; |
| 1388 | break; |
| 1389 | } |
| 1390 | |
Shaun Pereira | cb65d50 | 2005-06-22 22:15:01 -0700 | [diff] [blame] | 1391 | case SIOCX25SCUDMATCHLEN: { |
| 1392 | struct x25_subaddr sub_addr; |
| 1393 | rc = -EINVAL; |
| 1394 | if(sk->sk_state != TCP_CLOSE) |
| 1395 | break; |
| 1396 | rc = -EFAULT; |
| 1397 | if (copy_from_user(&sub_addr, argp, |
| 1398 | sizeof(sub_addr))) |
| 1399 | break; |
| 1400 | rc = -EINVAL; |
| 1401 | if(sub_addr.cudmatchlength > X25_MAX_CUD_LEN) |
| 1402 | break; |
| 1403 | x25->cudmatchlength = sub_addr.cudmatchlength; |
| 1404 | rc = 0; |
| 1405 | break; |
| 1406 | } |
| 1407 | |
Shaun Pereira | ebc3f64 | 2005-06-22 22:16:17 -0700 | [diff] [blame] | 1408 | case SIOCX25CALLACCPTAPPRV: { |
| 1409 | rc = -EINVAL; |
| 1410 | if (sk->sk_state != TCP_CLOSE) |
| 1411 | break; |
| 1412 | x25->accptapprv = X25_ALLOW_ACCPT_APPRV; |
| 1413 | rc = 0; |
| 1414 | break; |
| 1415 | } |
| 1416 | |
| 1417 | case SIOCX25SENDCALLACCPT: { |
| 1418 | rc = -EINVAL; |
| 1419 | if (sk->sk_state != TCP_ESTABLISHED) |
| 1420 | break; |
| 1421 | if (x25->accptapprv) /* must call accptapprv above */ |
| 1422 | break; |
| 1423 | x25_write_internal(sk, X25_CALL_ACCEPTED); |
| 1424 | x25->state = X25_STATE_3; |
| 1425 | rc = 0; |
| 1426 | break; |
| 1427 | } |
| 1428 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | default: |
Christoph Hellwig | b5e5fa5 | 2006-01-03 14:18:33 -0800 | [diff] [blame] | 1430 | rc = -ENOIOCTLCMD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | break; |
| 1432 | } |
| 1433 | |
| 1434 | return rc; |
| 1435 | } |
| 1436 | |
| 1437 | static struct net_proto_family x25_family_ops = { |
| 1438 | .family = AF_X25, |
| 1439 | .create = x25_create, |
| 1440 | .owner = THIS_MODULE, |
| 1441 | }; |
| 1442 | |
Shaun Pereira | 1b06e6b | 2006-03-22 00:00:12 -0800 | [diff] [blame] | 1443 | #ifdef CONFIG_COMPAT |
| 1444 | static int compat_x25_subscr_ioctl(unsigned int cmd, |
| 1445 | struct compat_x25_subscrip_struct __user *x25_subscr32) |
| 1446 | { |
| 1447 | struct compat_x25_subscrip_struct x25_subscr; |
| 1448 | struct x25_neigh *nb; |
| 1449 | struct net_device *dev; |
| 1450 | int rc = -EINVAL; |
| 1451 | |
| 1452 | rc = -EFAULT; |
| 1453 | if (copy_from_user(&x25_subscr, x25_subscr32, sizeof(*x25_subscr32))) |
| 1454 | goto out; |
| 1455 | |
| 1456 | rc = -EINVAL; |
| 1457 | dev = x25_dev_get(x25_subscr.device); |
| 1458 | if (dev == NULL) |
| 1459 | goto out; |
| 1460 | |
| 1461 | nb = x25_get_neigh(dev); |
| 1462 | if (nb == NULL) |
| 1463 | goto out_dev_put; |
| 1464 | |
| 1465 | dev_put(dev); |
| 1466 | |
| 1467 | if (cmd == SIOCX25GSUBSCRIP) { |
| 1468 | x25_subscr.extended = nb->extended; |
| 1469 | x25_subscr.global_facil_mask = nb->global_facil_mask; |
| 1470 | rc = copy_to_user(x25_subscr32, &x25_subscr, |
| 1471 | sizeof(*x25_subscr32)) ? -EFAULT : 0; |
| 1472 | } else { |
| 1473 | rc = -EINVAL; |
| 1474 | if (x25_subscr.extended == 0 || x25_subscr.extended == 1) { |
| 1475 | rc = 0; |
| 1476 | nb->extended = x25_subscr.extended; |
| 1477 | nb->global_facil_mask = x25_subscr.global_facil_mask; |
| 1478 | } |
| 1479 | } |
| 1480 | x25_neigh_put(nb); |
| 1481 | out: |
| 1482 | return rc; |
| 1483 | out_dev_put: |
| 1484 | dev_put(dev); |
| 1485 | goto out; |
| 1486 | } |
| 1487 | |
| 1488 | static int compat_x25_ioctl(struct socket *sock, unsigned int cmd, |
| 1489 | unsigned long arg) |
| 1490 | { |
| 1491 | void __user *argp = compat_ptr(arg); |
| 1492 | struct sock *sk = sock->sk; |
| 1493 | |
| 1494 | int rc = -ENOIOCTLCMD; |
| 1495 | |
| 1496 | switch(cmd) { |
| 1497 | case TIOCOUTQ: |
| 1498 | case TIOCINQ: |
| 1499 | rc = x25_ioctl(sock, cmd, (unsigned long)argp); |
| 1500 | break; |
| 1501 | case SIOCGSTAMP: |
| 1502 | rc = -EINVAL; |
| 1503 | if (sk) |
| 1504 | rc = compat_sock_get_timestamp(sk, |
| 1505 | (struct timeval __user*)argp); |
| 1506 | break; |
| 1507 | case SIOCGIFADDR: |
| 1508 | case SIOCSIFADDR: |
| 1509 | case SIOCGIFDSTADDR: |
| 1510 | case SIOCSIFDSTADDR: |
| 1511 | case SIOCGIFBRDADDR: |
| 1512 | case SIOCSIFBRDADDR: |
| 1513 | case SIOCGIFNETMASK: |
| 1514 | case SIOCSIFNETMASK: |
| 1515 | case SIOCGIFMETRIC: |
| 1516 | case SIOCSIFMETRIC: |
| 1517 | rc = -EINVAL; |
| 1518 | break; |
| 1519 | case SIOCADDRT: |
| 1520 | case SIOCDELRT: |
| 1521 | rc = -EPERM; |
| 1522 | if (!capable(CAP_NET_ADMIN)) |
| 1523 | break; |
| 1524 | rc = x25_route_ioctl(cmd, argp); |
| 1525 | break; |
| 1526 | case SIOCX25GSUBSCRIP: |
| 1527 | rc = compat_x25_subscr_ioctl(cmd, argp); |
| 1528 | break; |
| 1529 | case SIOCX25SSUBSCRIP: |
| 1530 | rc = -EPERM; |
| 1531 | if (!capable(CAP_NET_ADMIN)) |
| 1532 | break; |
| 1533 | rc = compat_x25_subscr_ioctl(cmd, argp); |
| 1534 | break; |
| 1535 | case SIOCX25GFACILITIES: |
| 1536 | case SIOCX25SFACILITIES: |
Shaun Pereira | 9a6b9f2 | 2006-03-22 00:02:00 -0800 | [diff] [blame] | 1537 | case SIOCX25GDTEFACILITIES: |
| 1538 | case SIOCX25SDTEFACILITIES: |
Shaun Pereira | 1b06e6b | 2006-03-22 00:00:12 -0800 | [diff] [blame] | 1539 | case SIOCX25GCALLUSERDATA: |
| 1540 | case SIOCX25SCALLUSERDATA: |
| 1541 | case SIOCX25GCAUSEDIAG: |
| 1542 | case SIOCX25SCUDMATCHLEN: |
| 1543 | case SIOCX25CALLACCPTAPPRV: |
| 1544 | case SIOCX25SENDCALLACCPT: |
| 1545 | rc = x25_ioctl(sock, cmd, (unsigned long)argp); |
| 1546 | break; |
| 1547 | default: |
| 1548 | rc = -ENOIOCTLCMD; |
| 1549 | break; |
| 1550 | } |
| 1551 | return rc; |
| 1552 | } |
| 1553 | #endif |
| 1554 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 1555 | static const struct proto_ops SOCKOPS_WRAPPED(x25_proto_ops) = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | .family = AF_X25, |
| 1557 | .owner = THIS_MODULE, |
| 1558 | .release = x25_release, |
| 1559 | .bind = x25_bind, |
| 1560 | .connect = x25_connect, |
| 1561 | .socketpair = sock_no_socketpair, |
| 1562 | .accept = x25_accept, |
| 1563 | .getname = x25_getname, |
| 1564 | .poll = datagram_poll, |
| 1565 | .ioctl = x25_ioctl, |
Shaun Pereira | 1b06e6b | 2006-03-22 00:00:12 -0800 | [diff] [blame] | 1566 | #ifdef CONFIG_COMPAT |
| 1567 | .compat_ioctl = compat_x25_ioctl, |
| 1568 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | .listen = x25_listen, |
| 1570 | .shutdown = sock_no_shutdown, |
| 1571 | .setsockopt = x25_setsockopt, |
| 1572 | .getsockopt = x25_getsockopt, |
| 1573 | .sendmsg = x25_sendmsg, |
| 1574 | .recvmsg = x25_recvmsg, |
| 1575 | .mmap = sock_no_mmap, |
| 1576 | .sendpage = sock_no_sendpage, |
| 1577 | }; |
| 1578 | |
| 1579 | #include <linux/smp_lock.h> |
| 1580 | SOCKOPS_WRAP(x25_proto, AF_X25); |
| 1581 | |
| 1582 | static struct packet_type x25_packet_type = { |
| 1583 | .type = __constant_htons(ETH_P_X25), |
| 1584 | .func = x25_lapb_receive_frame, |
| 1585 | }; |
| 1586 | |
| 1587 | static struct notifier_block x25_dev_notifier = { |
| 1588 | .notifier_call = x25_device_event, |
| 1589 | }; |
| 1590 | |
| 1591 | void x25_kill_by_neigh(struct x25_neigh *nb) |
| 1592 | { |
| 1593 | struct sock *s; |
| 1594 | struct hlist_node *node; |
| 1595 | |
| 1596 | write_lock_bh(&x25_list_lock); |
| 1597 | |
| 1598 | sk_for_each(s, node, &x25_list) |
| 1599 | if (x25_sk(s)->neighbour == nb) |
| 1600 | x25_disconnect(s, ENETUNREACH, 0, 0); |
| 1601 | |
| 1602 | write_unlock_bh(&x25_list_lock); |
| 1603 | } |
| 1604 | |
| 1605 | static int __init x25_init(void) |
| 1606 | { |
| 1607 | int rc = proto_register(&x25_proto, 0); |
| 1608 | |
| 1609 | if (rc != 0) |
| 1610 | goto out; |
| 1611 | |
| 1612 | sock_register(&x25_family_ops); |
| 1613 | |
| 1614 | dev_add_pack(&x25_packet_type); |
| 1615 | |
| 1616 | register_netdevice_notifier(&x25_dev_notifier); |
| 1617 | |
| 1618 | printk(KERN_INFO "X.25 for Linux. Version 0.2 for Linux 2.1.15\n"); |
| 1619 | |
| 1620 | #ifdef CONFIG_SYSCTL |
| 1621 | x25_register_sysctl(); |
| 1622 | #endif |
| 1623 | x25_proc_init(); |
| 1624 | out: |
| 1625 | return rc; |
| 1626 | } |
| 1627 | module_init(x25_init); |
| 1628 | |
| 1629 | static void __exit x25_exit(void) |
| 1630 | { |
| 1631 | x25_proc_exit(); |
| 1632 | x25_link_free(); |
| 1633 | x25_route_free(); |
| 1634 | |
| 1635 | #ifdef CONFIG_SYSCTL |
| 1636 | x25_unregister_sysctl(); |
| 1637 | #endif |
| 1638 | |
| 1639 | unregister_netdevice_notifier(&x25_dev_notifier); |
| 1640 | |
| 1641 | dev_remove_pack(&x25_packet_type); |
| 1642 | |
| 1643 | sock_unregister(AF_X25); |
| 1644 | proto_unregister(&x25_proto); |
| 1645 | } |
| 1646 | module_exit(x25_exit); |
| 1647 | |
| 1648 | MODULE_AUTHOR("Jonathan Naylor <g4klx@g4klx.demon.co.uk>"); |
| 1649 | MODULE_DESCRIPTION("The X.25 Packet Layer network layer protocol"); |
| 1650 | MODULE_LICENSE("GPL"); |
| 1651 | MODULE_ALIAS_NETPROTO(PF_X25); |