Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk) |
| 8 | * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) |
| 9 | * Copyright (C) Darryl Miles G7LED (dlm@g7led.demon.co.uk) |
| 10 | * Copyright (C) Steven Whitehouse GW7RRM (stevew@acm.org) |
| 11 | * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de) |
| 12 | * Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de) |
| 13 | * Copyright (C) Hans Alblas PE1AYX (hans@esrac.ele.tue.nl) |
| 14 | * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr) |
| 15 | */ |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 16 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/module.h> |
| 18 | #include <linux/errno.h> |
| 19 | #include <linux/types.h> |
| 20 | #include <linux/socket.h> |
| 21 | #include <linux/in.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/sched.h> |
| 24 | #include <linux/timer.h> |
| 25 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/sockios.h> |
| 27 | #include <linux/net.h> |
| 28 | #include <net/ax25.h> |
| 29 | #include <linux/inet.h> |
| 30 | #include <linux/netdevice.h> |
| 31 | #include <linux/if_arp.h> |
| 32 | #include <linux/skbuff.h> |
| 33 | #include <net/sock.h> |
| 34 | #include <asm/uaccess.h> |
| 35 | #include <asm/system.h> |
| 36 | #include <linux/fcntl.h> |
| 37 | #include <linux/termios.h> /* For TIOCINQ/OUTQ */ |
| 38 | #include <linux/mm.h> |
| 39 | #include <linux/interrupt.h> |
| 40 | #include <linux/notifier.h> |
| 41 | #include <linux/proc_fs.h> |
| 42 | #include <linux/stat.h> |
| 43 | #include <linux/netfilter.h> |
| 44 | #include <linux/sysctl.h> |
| 45 | #include <linux/init.h> |
| 46 | #include <linux/spinlock.h> |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 47 | #include <net/net_namespace.h> |
Arnaldo Carvalho de Melo | c752f07 | 2005-08-09 20:08:28 -0700 | [diff] [blame] | 48 | #include <net/tcp_states.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #include <net/ip.h> |
| 50 | #include <net/arp.h> |
| 51 | |
| 52 | |
| 53 | |
| 54 | HLIST_HEAD(ax25_list); |
| 55 | DEFINE_SPINLOCK(ax25_list_lock); |
| 56 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 57 | static const struct proto_ops ax25_proto_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
| 59 | static void ax25_free_sock(struct sock *sk) |
| 60 | { |
| 61 | ax25_cb_put(ax25_sk(sk)); |
| 62 | } |
| 63 | |
| 64 | /* |
| 65 | * Socket removal during an interrupt is now safe. |
| 66 | */ |
| 67 | static void ax25_cb_del(ax25_cb *ax25) |
| 68 | { |
| 69 | if (!hlist_unhashed(&ax25->ax25_node)) { |
| 70 | spin_lock_bh(&ax25_list_lock); |
| 71 | hlist_del_init(&ax25->ax25_node); |
| 72 | spin_unlock_bh(&ax25_list_lock); |
| 73 | ax25_cb_put(ax25); |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | /* |
| 78 | * Kill all bound sockets on a dropped device. |
| 79 | */ |
| 80 | static void ax25_kill_by_device(struct net_device *dev) |
| 81 | { |
| 82 | ax25_dev *ax25_dev; |
| 83 | ax25_cb *s; |
| 84 | struct hlist_node *node; |
| 85 | |
| 86 | if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) |
| 87 | return; |
| 88 | |
| 89 | spin_lock_bh(&ax25_list_lock); |
Jarek Poplawski | ecd2ebd | 2008-01-10 21:21:20 -0800 | [diff] [blame] | 90 | again: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | ax25_for_each(s, node, &ax25_list) { |
| 92 | if (s->ax25_dev == ax25_dev) { |
| 93 | s->ax25_dev = NULL; |
Jarek Poplawski | ecd2ebd | 2008-01-10 21:21:20 -0800 | [diff] [blame] | 94 | spin_unlock_bh(&ax25_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | ax25_disconnect(s, ENETUNREACH); |
Jarek Poplawski | ecd2ebd | 2008-01-10 21:21:20 -0800 | [diff] [blame] | 96 | spin_lock_bh(&ax25_list_lock); |
| 97 | |
| 98 | /* The entry could have been deleted from the |
| 99 | * list meanwhile and thus the next pointer is |
| 100 | * no longer valid. Play it safe and restart |
| 101 | * the scan. Forward progress is ensured |
| 102 | * because we set s->ax25_dev to NULL and we |
| 103 | * are never passed a NULL 'dev' argument. |
| 104 | */ |
| 105 | goto again; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | } |
| 107 | } |
| 108 | spin_unlock_bh(&ax25_list_lock); |
| 109 | } |
| 110 | |
| 111 | /* |
| 112 | * Handle device status changes. |
| 113 | */ |
| 114 | static int ax25_device_event(struct notifier_block *this, unsigned long event, |
| 115 | void *ptr) |
| 116 | { |
| 117 | struct net_device *dev = (struct net_device *)ptr; |
| 118 | |
YOSHIFUJI Hideaki | 721499e | 2008-07-19 22:34:43 -0700 | [diff] [blame] | 119 | if (!net_eq(dev_net(dev), &init_net)) |
Eric W. Biederman | e9dc865 | 2007-09-12 13:02:17 +0200 | [diff] [blame] | 120 | return NOTIFY_DONE; |
| 121 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | /* Reject non AX.25 devices */ |
| 123 | if (dev->type != ARPHRD_AX25) |
| 124 | return NOTIFY_DONE; |
| 125 | |
| 126 | switch (event) { |
| 127 | case NETDEV_UP: |
| 128 | ax25_dev_device_up(dev); |
| 129 | break; |
| 130 | case NETDEV_DOWN: |
| 131 | ax25_kill_by_device(dev); |
| 132 | ax25_rt_device_down(dev); |
| 133 | ax25_dev_device_down(dev); |
| 134 | break; |
| 135 | default: |
| 136 | break; |
| 137 | } |
| 138 | |
| 139 | return NOTIFY_DONE; |
| 140 | } |
| 141 | |
| 142 | /* |
| 143 | * Add a socket to the bound sockets list. |
| 144 | */ |
| 145 | void ax25_cb_add(ax25_cb *ax25) |
| 146 | { |
| 147 | spin_lock_bh(&ax25_list_lock); |
| 148 | ax25_cb_hold(ax25); |
| 149 | hlist_add_head(&ax25->ax25_node, &ax25_list); |
| 150 | spin_unlock_bh(&ax25_list_lock); |
| 151 | } |
| 152 | |
| 153 | /* |
| 154 | * Find a socket that wants to accept the SABM we have just |
| 155 | * received. |
| 156 | */ |
| 157 | struct sock *ax25_find_listener(ax25_address *addr, int digi, |
| 158 | struct net_device *dev, int type) |
| 159 | { |
| 160 | ax25_cb *s; |
| 161 | struct hlist_node *node; |
| 162 | |
Ralf Baechle | c19c4b9 | 2006-07-12 13:25:23 -0700 | [diff] [blame] | 163 | spin_lock(&ax25_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | ax25_for_each(s, node, &ax25_list) { |
| 165 | if ((s->iamdigi && !digi) || (!s->iamdigi && digi)) |
| 166 | continue; |
| 167 | if (s->sk && !ax25cmp(&s->source_addr, addr) && |
| 168 | s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) { |
| 169 | /* If device is null we match any device */ |
| 170 | if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) { |
| 171 | sock_hold(s->sk); |
Ralf Baechle | c19c4b9 | 2006-07-12 13:25:23 -0700 | [diff] [blame] | 172 | spin_unlock(&ax25_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | return s->sk; |
| 174 | } |
| 175 | } |
| 176 | } |
Ralf Baechle | c19c4b9 | 2006-07-12 13:25:23 -0700 | [diff] [blame] | 177 | spin_unlock(&ax25_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
| 179 | return NULL; |
| 180 | } |
| 181 | |
| 182 | /* |
| 183 | * Find an AX.25 socket given both ends. |
| 184 | */ |
| 185 | struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr, |
| 186 | int type) |
| 187 | { |
| 188 | struct sock *sk = NULL; |
| 189 | ax25_cb *s; |
| 190 | struct hlist_node *node; |
| 191 | |
Ralf Baechle | c19c4b9 | 2006-07-12 13:25:23 -0700 | [diff] [blame] | 192 | spin_lock(&ax25_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | ax25_for_each(s, node, &ax25_list) { |
| 194 | if (s->sk && !ax25cmp(&s->source_addr, my_addr) && |
| 195 | !ax25cmp(&s->dest_addr, dest_addr) && |
| 196 | s->sk->sk_type == type) { |
| 197 | sk = s->sk; |
| 198 | sock_hold(sk); |
| 199 | break; |
| 200 | } |
| 201 | } |
| 202 | |
Ralf Baechle | c19c4b9 | 2006-07-12 13:25:23 -0700 | [diff] [blame] | 203 | spin_unlock(&ax25_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | |
| 205 | return sk; |
| 206 | } |
| 207 | |
| 208 | /* |
| 209 | * Find an AX.25 control block given both ends. It will only pick up |
| 210 | * floating AX.25 control blocks or non Raw socket bound control blocks. |
| 211 | */ |
| 212 | ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr, |
| 213 | ax25_digi *digi, struct net_device *dev) |
| 214 | { |
| 215 | ax25_cb *s; |
| 216 | struct hlist_node *node; |
| 217 | |
| 218 | spin_lock_bh(&ax25_list_lock); |
| 219 | ax25_for_each(s, node, &ax25_list) { |
| 220 | if (s->sk && s->sk->sk_type != SOCK_SEQPACKET) |
| 221 | continue; |
| 222 | if (s->ax25_dev == NULL) |
| 223 | continue; |
| 224 | if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) { |
| 225 | if (digi != NULL && digi->ndigi != 0) { |
| 226 | if (s->digipeat == NULL) |
| 227 | continue; |
| 228 | if (ax25digicmp(s->digipeat, digi) != 0) |
| 229 | continue; |
| 230 | } else { |
| 231 | if (s->digipeat != NULL && s->digipeat->ndigi != 0) |
| 232 | continue; |
| 233 | } |
| 234 | ax25_cb_hold(s); |
| 235 | spin_unlock_bh(&ax25_list_lock); |
| 236 | |
| 237 | return s; |
| 238 | } |
| 239 | } |
| 240 | spin_unlock_bh(&ax25_list_lock); |
| 241 | |
| 242 | return NULL; |
| 243 | } |
| 244 | |
Ralf Baechle | 70868ea | 2006-05-03 23:25:17 -0700 | [diff] [blame] | 245 | EXPORT_SYMBOL(ax25_find_cb); |
| 246 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto) |
| 248 | { |
| 249 | ax25_cb *s; |
| 250 | struct sk_buff *copy; |
| 251 | struct hlist_node *node; |
| 252 | |
Ralf Baechle | c19c4b9 | 2006-07-12 13:25:23 -0700 | [diff] [blame] | 253 | spin_lock(&ax25_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | ax25_for_each(s, node, &ax25_list) { |
| 255 | if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 && |
| 256 | s->sk->sk_type == SOCK_RAW && |
| 257 | s->sk->sk_protocol == proto && |
| 258 | s->ax25_dev->dev == skb->dev && |
| 259 | atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) { |
| 260 | if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL) |
| 261 | continue; |
| 262 | if (sock_queue_rcv_skb(s->sk, copy) != 0) |
| 263 | kfree_skb(copy); |
| 264 | } |
| 265 | } |
Ralf Baechle | c19c4b9 | 2006-07-12 13:25:23 -0700 | [diff] [blame] | 266 | spin_unlock(&ax25_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | } |
| 268 | |
| 269 | /* |
| 270 | * Deferred destroy. |
| 271 | */ |
| 272 | void ax25_destroy_socket(ax25_cb *); |
| 273 | |
| 274 | /* |
| 275 | * Handler for deferred kills. |
| 276 | */ |
| 277 | static void ax25_destroy_timer(unsigned long data) |
| 278 | { |
| 279 | ax25_cb *ax25=(ax25_cb *)data; |
| 280 | struct sock *sk; |
YOSHIFUJI Hideaki | 528930b | 2007-02-09 23:24:31 +0900 | [diff] [blame] | 281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | sk=ax25->sk; |
YOSHIFUJI Hideaki | 528930b | 2007-02-09 23:24:31 +0900 | [diff] [blame] | 283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | bh_lock_sock(sk); |
| 285 | sock_hold(sk); |
| 286 | ax25_destroy_socket(ax25); |
| 287 | bh_unlock_sock(sk); |
| 288 | sock_put(sk); |
| 289 | } |
| 290 | |
| 291 | /* |
| 292 | * This is called from user mode and the timers. Thus it protects itself |
| 293 | * against interrupt users but doesn't worry about being called during |
| 294 | * work. Once it is removed from the queue no interrupt or bottom half |
| 295 | * will touch it and we are (fairly 8-) ) safe. |
| 296 | */ |
| 297 | void ax25_destroy_socket(ax25_cb *ax25) |
| 298 | { |
| 299 | struct sk_buff *skb; |
| 300 | |
| 301 | ax25_cb_del(ax25); |
| 302 | |
| 303 | ax25_stop_heartbeat(ax25); |
| 304 | ax25_stop_t1timer(ax25); |
| 305 | ax25_stop_t2timer(ax25); |
| 306 | ax25_stop_t3timer(ax25); |
| 307 | ax25_stop_idletimer(ax25); |
| 308 | |
| 309 | ax25_clear_queues(ax25); /* Flush the queues */ |
| 310 | |
| 311 | if (ax25->sk != NULL) { |
| 312 | while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) { |
| 313 | if (skb->sk != ax25->sk) { |
| 314 | /* A pending connection */ |
| 315 | ax25_cb *sax25 = ax25_sk(skb->sk); |
| 316 | |
| 317 | /* Queue the unaccepted socket for death */ |
| 318 | sock_orphan(skb->sk); |
| 319 | |
David S. Miller | 33d1d2c | 2008-10-06 12:53:50 -0700 | [diff] [blame] | 320 | /* 9A4GL: hack to release unaccepted sockets */ |
| 321 | skb->sk->sk_state = TCP_LISTEN; |
| 322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | ax25_start_heartbeat(sax25); |
| 324 | sax25->state = AX25_STATE_0; |
| 325 | } |
| 326 | |
| 327 | kfree_skb(skb); |
| 328 | } |
| 329 | skb_queue_purge(&ax25->sk->sk_write_queue); |
| 330 | } |
| 331 | |
| 332 | if (ax25->sk != NULL) { |
| 333 | if (atomic_read(&ax25->sk->sk_wmem_alloc) || |
| 334 | atomic_read(&ax25->sk->sk_rmem_alloc)) { |
| 335 | /* Defer: outstanding buffers */ |
Pavel Emelyanov | b24b8a2 | 2008-01-23 21:20:07 -0800 | [diff] [blame] | 336 | setup_timer(&ax25->dtimer, ax25_destroy_timer, |
| 337 | (unsigned long)ax25); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | ax25->dtimer.expires = jiffies + 2 * HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | add_timer(&ax25->dtimer); |
| 340 | } else { |
| 341 | struct sock *sk=ax25->sk; |
| 342 | ax25->sk=NULL; |
| 343 | sock_put(sk); |
| 344 | } |
| 345 | } else { |
| 346 | ax25_cb_put(ax25); |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | /* |
| 351 | * dl1bke 960311: set parameters for existing AX.25 connections, |
| 352 | * includes a KILL command to abort any connection. |
| 353 | * VERY useful for debugging ;-) |
| 354 | */ |
| 355 | static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg) |
| 356 | { |
| 357 | struct ax25_ctl_struct ax25_ctl; |
| 358 | ax25_digi digi; |
| 359 | ax25_dev *ax25_dev; |
| 360 | ax25_cb *ax25; |
| 361 | unsigned int k; |
| 362 | |
| 363 | if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl))) |
| 364 | return -EFAULT; |
| 365 | |
| 366 | if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL) |
| 367 | return -ENODEV; |
| 368 | |
| 369 | if (ax25_ctl.digi_count > AX25_MAX_DIGIS) |
| 370 | return -EINVAL; |
| 371 | |
| 372 | digi.ndigi = ax25_ctl.digi_count; |
| 373 | for (k = 0; k < digi.ndigi; k++) |
| 374 | digi.calls[k] = ax25_ctl.digi_addr[k]; |
| 375 | |
| 376 | if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL) |
| 377 | return -ENOTCONN; |
| 378 | |
| 379 | switch (ax25_ctl.cmd) { |
| 380 | case AX25_KILL: |
| 381 | ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND); |
| 382 | #ifdef CONFIG_AX25_DAMA_SLAVE |
| 383 | if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE) |
| 384 | ax25_dama_off(ax25); |
| 385 | #endif |
| 386 | ax25_disconnect(ax25, ENETRESET); |
| 387 | break; |
| 388 | |
YOSHIFUJI Hideaki | 528930b | 2007-02-09 23:24:31 +0900 | [diff] [blame] | 389 | case AX25_WINDOW: |
| 390 | if (ax25->modulus == AX25_MODULUS) { |
| 391 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7) |
| 392 | return -EINVAL; |
| 393 | } else { |
| 394 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63) |
| 395 | return -EINVAL; |
| 396 | } |
| 397 | ax25->window = ax25_ctl.arg; |
| 398 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | |
YOSHIFUJI Hideaki | 528930b | 2007-02-09 23:24:31 +0900 | [diff] [blame] | 400 | case AX25_T1: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | if (ax25_ctl.arg < 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | return -EINVAL; |
YOSHIFUJI Hideaki | 528930b | 2007-02-09 23:24:31 +0900 | [diff] [blame] | 403 | ax25->rtt = (ax25_ctl.arg * HZ) / 2; |
| 404 | ax25->t1 = ax25_ctl.arg * HZ; |
| 405 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | |
YOSHIFUJI Hideaki | 528930b | 2007-02-09 23:24:31 +0900 | [diff] [blame] | 407 | case AX25_T2: |
| 408 | if (ax25_ctl.arg < 1) |
| 409 | return -EINVAL; |
| 410 | ax25->t2 = ax25_ctl.arg * HZ; |
| 411 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | |
YOSHIFUJI Hideaki | 528930b | 2007-02-09 23:24:31 +0900 | [diff] [blame] | 413 | case AX25_N2: |
| 414 | if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31) |
| 415 | return -EINVAL; |
| 416 | ax25->n2count = 0; |
| 417 | ax25->n2 = ax25_ctl.arg; |
| 418 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | |
YOSHIFUJI Hideaki | 528930b | 2007-02-09 23:24:31 +0900 | [diff] [blame] | 420 | case AX25_T3: |
| 421 | if (ax25_ctl.arg < 0) |
| 422 | return -EINVAL; |
| 423 | ax25->t3 = ax25_ctl.arg * HZ; |
| 424 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | |
YOSHIFUJI Hideaki | 528930b | 2007-02-09 23:24:31 +0900 | [diff] [blame] | 426 | case AX25_IDLE: |
| 427 | if (ax25_ctl.arg < 0) |
| 428 | return -EINVAL; |
| 429 | ax25->idle = ax25_ctl.arg * 60 * HZ; |
| 430 | break; |
| 431 | |
| 432 | case AX25_PACLEN: |
| 433 | if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535) |
| 434 | return -EINVAL; |
| 435 | ax25->paclen = ax25_ctl.arg; |
| 436 | break; |
| 437 | |
| 438 | default: |
| 439 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | } |
| 441 | |
| 442 | return 0; |
| 443 | } |
| 444 | |
Ralf Baechle | e1fdb5b | 2006-05-03 23:27:16 -0700 | [diff] [blame] | 445 | static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev) |
| 446 | { |
| 447 | ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2; |
| 448 | ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]); |
| 449 | ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]); |
| 450 | ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]); |
| 451 | ax25->n2 = ax25_dev->values[AX25_VALUES_N2]; |
| 452 | ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN]; |
| 453 | ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]); |
| 454 | ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF]; |
| 455 | |
| 456 | if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) { |
| 457 | ax25->modulus = AX25_EMODULUS; |
| 458 | ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW]; |
| 459 | } else { |
| 460 | ax25->modulus = AX25_MODULUS; |
| 461 | ax25->window = ax25_dev->values[AX25_VALUES_WINDOW]; |
| 462 | } |
| 463 | } |
| 464 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | /* |
| 466 | * Fill in a created AX.25 created control block with the default |
| 467 | * values for a particular device. |
| 468 | */ |
| 469 | void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev) |
| 470 | { |
| 471 | ax25->ax25_dev = ax25_dev; |
| 472 | |
| 473 | if (ax25->ax25_dev != NULL) { |
Ralf Baechle | e1fdb5b | 2006-05-03 23:27:16 -0700 | [diff] [blame] | 474 | ax25_fillin_cb_from_dev(ax25, ax25_dev); |
| 475 | return; |
| 476 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | |
Ralf Baechle | e1fdb5b | 2006-05-03 23:27:16 -0700 | [diff] [blame] | 478 | /* |
| 479 | * No device, use kernel / AX.25 spec default values |
| 480 | */ |
| 481 | ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2; |
| 482 | ax25->t1 = msecs_to_jiffies(AX25_DEF_T1); |
| 483 | ax25->t2 = msecs_to_jiffies(AX25_DEF_T2); |
| 484 | ax25->t3 = msecs_to_jiffies(AX25_DEF_T3); |
| 485 | ax25->n2 = AX25_DEF_N2; |
| 486 | ax25->paclen = AX25_DEF_PACLEN; |
| 487 | ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE); |
| 488 | ax25->backoff = AX25_DEF_BACKOFF; |
| 489 | |
| 490 | if (AX25_DEF_AXDEFMODE) { |
| 491 | ax25->modulus = AX25_EMODULUS; |
| 492 | ax25->window = AX25_DEF_EWINDOW; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | } else { |
Ralf Baechle | e1fdb5b | 2006-05-03 23:27:16 -0700 | [diff] [blame] | 494 | ax25->modulus = AX25_MODULUS; |
| 495 | ax25->window = AX25_DEF_WINDOW; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | } |
| 497 | } |
| 498 | |
| 499 | /* |
| 500 | * Create an empty AX.25 control block. |
| 501 | */ |
| 502 | ax25_cb *ax25_create_cb(void) |
| 503 | { |
| 504 | ax25_cb *ax25; |
| 505 | |
Ralf Baechle | 1b30dd3 | 2006-07-09 12:14:22 -0700 | [diff] [blame] | 506 | if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | return NULL; |
| 508 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | atomic_set(&ax25->refcount, 1); |
| 510 | |
| 511 | skb_queue_head_init(&ax25->write_queue); |
| 512 | skb_queue_head_init(&ax25->frag_queue); |
| 513 | skb_queue_head_init(&ax25->ack_queue); |
| 514 | skb_queue_head_init(&ax25->reseq_queue); |
| 515 | |
Jarek Poplawski | 21fab4a | 2008-02-11 21:36:39 -0800 | [diff] [blame] | 516 | ax25_setup_timers(ax25); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
| 518 | ax25_fillin_cb(ax25, NULL); |
| 519 | |
| 520 | ax25->state = AX25_STATE_0; |
| 521 | |
| 522 | return ax25; |
| 523 | } |
| 524 | |
| 525 | /* |
| 526 | * Handling for system calls applied via the various interfaces to an |
| 527 | * AX25 socket object |
| 528 | */ |
| 529 | |
| 530 | static int ax25_setsockopt(struct socket *sock, int level, int optname, |
| 531 | char __user *optval, int optlen) |
| 532 | { |
| 533 | struct sock *sk = sock->sk; |
| 534 | ax25_cb *ax25; |
| 535 | struct net_device *dev; |
| 536 | char devname[IFNAMSIZ]; |
| 537 | int opt, res = 0; |
| 538 | |
| 539 | if (level != SOL_AX25) |
| 540 | return -ENOPROTOOPT; |
| 541 | |
| 542 | if (optlen < sizeof(int)) |
| 543 | return -EINVAL; |
| 544 | |
| 545 | if (get_user(opt, (int __user *)optval)) |
| 546 | return -EFAULT; |
| 547 | |
| 548 | lock_sock(sk); |
| 549 | ax25 = ax25_sk(sk); |
| 550 | |
| 551 | switch (optname) { |
| 552 | case AX25_WINDOW: |
| 553 | if (ax25->modulus == AX25_MODULUS) { |
| 554 | if (opt < 1 || opt > 7) { |
| 555 | res = -EINVAL; |
| 556 | break; |
| 557 | } |
| 558 | } else { |
| 559 | if (opt < 1 || opt > 63) { |
| 560 | res = -EINVAL; |
| 561 | break; |
| 562 | } |
| 563 | } |
| 564 | ax25->window = opt; |
| 565 | break; |
| 566 | |
| 567 | case AX25_T1: |
| 568 | if (opt < 1) { |
| 569 | res = -EINVAL; |
| 570 | break; |
| 571 | } |
Eric Dumazet | f16f302 | 2008-01-13 22:29:41 -0800 | [diff] [blame] | 572 | ax25->rtt = (opt * HZ) >> 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | ax25->t1 = opt * HZ; |
| 574 | break; |
| 575 | |
| 576 | case AX25_T2: |
| 577 | if (opt < 1) { |
| 578 | res = -EINVAL; |
| 579 | break; |
| 580 | } |
| 581 | ax25->t2 = opt * HZ; |
| 582 | break; |
| 583 | |
| 584 | case AX25_N2: |
| 585 | if (opt < 1 || opt > 31) { |
| 586 | res = -EINVAL; |
| 587 | break; |
| 588 | } |
| 589 | ax25->n2 = opt; |
| 590 | break; |
| 591 | |
| 592 | case AX25_T3: |
| 593 | if (opt < 1) { |
| 594 | res = -EINVAL; |
| 595 | break; |
| 596 | } |
| 597 | ax25->t3 = opt * HZ; |
| 598 | break; |
| 599 | |
| 600 | case AX25_IDLE: |
| 601 | if (opt < 0) { |
| 602 | res = -EINVAL; |
| 603 | break; |
| 604 | } |
| 605 | ax25->idle = opt * 60 * HZ; |
| 606 | break; |
| 607 | |
| 608 | case AX25_BACKOFF: |
| 609 | if (opt < 0 || opt > 2) { |
| 610 | res = -EINVAL; |
| 611 | break; |
| 612 | } |
| 613 | ax25->backoff = opt; |
| 614 | break; |
| 615 | |
| 616 | case AX25_EXTSEQ: |
| 617 | ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS; |
| 618 | break; |
| 619 | |
| 620 | case AX25_PIDINCL: |
| 621 | ax25->pidincl = opt ? 1 : 0; |
| 622 | break; |
| 623 | |
| 624 | case AX25_IAMDIGI: |
| 625 | ax25->iamdigi = opt ? 1 : 0; |
| 626 | break; |
| 627 | |
| 628 | case AX25_PACLEN: |
| 629 | if (opt < 16 || opt > 65535) { |
| 630 | res = -EINVAL; |
| 631 | break; |
| 632 | } |
| 633 | ax25->paclen = opt; |
| 634 | break; |
| 635 | |
| 636 | case SO_BINDTODEVICE: |
| 637 | if (optlen > IFNAMSIZ) |
| 638 | optlen=IFNAMSIZ; |
| 639 | if (copy_from_user(devname, optval, optlen)) { |
| 640 | res = -EFAULT; |
| 641 | break; |
| 642 | } |
| 643 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 644 | dev = dev_get_by_name(&init_net, devname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | if (dev == NULL) { |
| 646 | res = -ENODEV; |
| 647 | break; |
| 648 | } |
| 649 | |
| 650 | if (sk->sk_type == SOCK_SEQPACKET && |
| 651 | (sock->state != SS_UNCONNECTED || |
| 652 | sk->sk_state == TCP_LISTEN)) { |
| 653 | res = -EADDRNOTAVAIL; |
| 654 | dev_put(dev); |
| 655 | break; |
| 656 | } |
| 657 | |
| 658 | ax25->ax25_dev = ax25_dev_ax25dev(dev); |
| 659 | ax25_fillin_cb(ax25, ax25->ax25_dev); |
| 660 | break; |
| 661 | |
| 662 | default: |
| 663 | res = -ENOPROTOOPT; |
| 664 | } |
| 665 | release_sock(sk); |
| 666 | |
| 667 | return res; |
| 668 | } |
| 669 | |
| 670 | static int ax25_getsockopt(struct socket *sock, int level, int optname, |
| 671 | char __user *optval, int __user *optlen) |
| 672 | { |
| 673 | struct sock *sk = sock->sk; |
| 674 | ax25_cb *ax25; |
| 675 | struct ax25_dev *ax25_dev; |
| 676 | char devname[IFNAMSIZ]; |
| 677 | void *valptr; |
| 678 | int val = 0; |
| 679 | int maxlen, length; |
| 680 | |
| 681 | if (level != SOL_AX25) |
| 682 | return -ENOPROTOOPT; |
| 683 | |
| 684 | if (get_user(maxlen, optlen)) |
| 685 | return -EFAULT; |
| 686 | |
| 687 | if (maxlen < 1) |
| 688 | return -EFAULT; |
| 689 | |
| 690 | valptr = (void *) &val; |
| 691 | length = min_t(unsigned int, maxlen, sizeof(int)); |
| 692 | |
| 693 | lock_sock(sk); |
| 694 | ax25 = ax25_sk(sk); |
| 695 | |
| 696 | switch (optname) { |
| 697 | case AX25_WINDOW: |
| 698 | val = ax25->window; |
| 699 | break; |
| 700 | |
| 701 | case AX25_T1: |
| 702 | val = ax25->t1 / HZ; |
| 703 | break; |
| 704 | |
| 705 | case AX25_T2: |
| 706 | val = ax25->t2 / HZ; |
| 707 | break; |
| 708 | |
| 709 | case AX25_N2: |
| 710 | val = ax25->n2; |
| 711 | break; |
| 712 | |
| 713 | case AX25_T3: |
| 714 | val = ax25->t3 / HZ; |
| 715 | break; |
| 716 | |
| 717 | case AX25_IDLE: |
| 718 | val = ax25->idle / (60 * HZ); |
| 719 | break; |
| 720 | |
| 721 | case AX25_BACKOFF: |
| 722 | val = ax25->backoff; |
| 723 | break; |
| 724 | |
| 725 | case AX25_EXTSEQ: |
| 726 | val = (ax25->modulus == AX25_EMODULUS); |
| 727 | break; |
| 728 | |
| 729 | case AX25_PIDINCL: |
| 730 | val = ax25->pidincl; |
| 731 | break; |
| 732 | |
| 733 | case AX25_IAMDIGI: |
| 734 | val = ax25->iamdigi; |
| 735 | break; |
| 736 | |
| 737 | case AX25_PACLEN: |
| 738 | val = ax25->paclen; |
| 739 | break; |
| 740 | |
| 741 | case SO_BINDTODEVICE: |
| 742 | ax25_dev = ax25->ax25_dev; |
| 743 | |
| 744 | if (ax25_dev != NULL && ax25_dev->dev != NULL) { |
| 745 | strlcpy(devname, ax25_dev->dev->name, sizeof(devname)); |
| 746 | length = strlen(devname) + 1; |
| 747 | } else { |
| 748 | *devname = '\0'; |
| 749 | length = 1; |
| 750 | } |
| 751 | |
| 752 | valptr = (void *) devname; |
| 753 | break; |
| 754 | |
| 755 | default: |
| 756 | release_sock(sk); |
| 757 | return -ENOPROTOOPT; |
| 758 | } |
| 759 | release_sock(sk); |
| 760 | |
| 761 | if (put_user(length, optlen)) |
| 762 | return -EFAULT; |
| 763 | |
| 764 | return copy_to_user(optval, valptr, length) ? -EFAULT : 0; |
| 765 | } |
| 766 | |
| 767 | static int ax25_listen(struct socket *sock, int backlog) |
| 768 | { |
| 769 | struct sock *sk = sock->sk; |
| 770 | int res = 0; |
| 771 | |
| 772 | lock_sock(sk); |
| 773 | if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) { |
| 774 | sk->sk_max_ack_backlog = backlog; |
| 775 | sk->sk_state = TCP_LISTEN; |
| 776 | goto out; |
| 777 | } |
| 778 | res = -EOPNOTSUPP; |
| 779 | |
| 780 | out: |
| 781 | release_sock(sk); |
| 782 | |
| 783 | return res; |
| 784 | } |
| 785 | |
| 786 | /* |
| 787 | * XXX: when creating ax25_sock we should update the .obj_size setting |
| 788 | * below. |
| 789 | */ |
| 790 | static struct proto ax25_proto = { |
| 791 | .name = "AX25", |
| 792 | .owner = THIS_MODULE, |
| 793 | .obj_size = sizeof(struct sock), |
| 794 | }; |
| 795 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 796 | static int ax25_create(struct net *net, struct socket *sock, int protocol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | { |
| 798 | struct sock *sk; |
| 799 | ax25_cb *ax25; |
| 800 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 801 | if (net != &init_net) |
| 802 | return -EAFNOSUPPORT; |
| 803 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | switch (sock->type) { |
| 805 | case SOCK_DGRAM: |
| 806 | if (protocol == 0 || protocol == PF_AX25) |
| 807 | protocol = AX25_P_TEXT; |
| 808 | break; |
| 809 | |
| 810 | case SOCK_SEQPACKET: |
| 811 | switch (protocol) { |
| 812 | case 0: |
| 813 | case PF_AX25: /* For CLX */ |
| 814 | protocol = AX25_P_TEXT; |
| 815 | break; |
| 816 | case AX25_P_SEGMENT: |
| 817 | #ifdef CONFIG_INET |
| 818 | case AX25_P_ARP: |
| 819 | case AX25_P_IP: |
| 820 | #endif |
| 821 | #ifdef CONFIG_NETROM |
| 822 | case AX25_P_NETROM: |
| 823 | #endif |
| 824 | #ifdef CONFIG_ROSE |
| 825 | case AX25_P_ROSE: |
| 826 | #endif |
| 827 | return -ESOCKTNOSUPPORT; |
| 828 | #ifdef CONFIG_NETROM_MODULE |
| 829 | case AX25_P_NETROM: |
| 830 | if (ax25_protocol_is_registered(AX25_P_NETROM)) |
| 831 | return -ESOCKTNOSUPPORT; |
| 832 | #endif |
| 833 | #ifdef CONFIG_ROSE_MODULE |
| 834 | case AX25_P_ROSE: |
| 835 | if (ax25_protocol_is_registered(AX25_P_ROSE)) |
| 836 | return -ESOCKTNOSUPPORT; |
| 837 | #endif |
| 838 | default: |
| 839 | break; |
| 840 | } |
| 841 | break; |
| 842 | |
| 843 | case SOCK_RAW: |
| 844 | break; |
| 845 | default: |
| 846 | return -ESOCKTNOSUPPORT; |
| 847 | } |
| 848 | |
Pavel Emelyanov | 6257ff2 | 2007-11-01 00:39:31 -0700 | [diff] [blame] | 849 | sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto); |
| 850 | if (sk == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | return -ENOMEM; |
| 852 | |
| 853 | ax25 = sk->sk_protinfo = ax25_create_cb(); |
| 854 | if (!ax25) { |
| 855 | sk_free(sk); |
| 856 | return -ENOMEM; |
| 857 | } |
| 858 | |
| 859 | sock_init_data(sock, sk); |
| 860 | |
| 861 | sk->sk_destruct = ax25_free_sock; |
| 862 | sock->ops = &ax25_proto_ops; |
| 863 | sk->sk_protocol = protocol; |
| 864 | |
| 865 | ax25->sk = sk; |
| 866 | |
| 867 | return 0; |
| 868 | } |
| 869 | |
| 870 | struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev) |
| 871 | { |
| 872 | struct sock *sk; |
| 873 | ax25_cb *ax25, *oax25; |
| 874 | |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 875 | sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot); |
Pavel Emelyanov | 6257ff2 | 2007-11-01 00:39:31 -0700 | [diff] [blame] | 876 | if (sk == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | return NULL; |
| 878 | |
| 879 | if ((ax25 = ax25_create_cb()) == NULL) { |
| 880 | sk_free(sk); |
| 881 | return NULL; |
| 882 | } |
| 883 | |
| 884 | switch (osk->sk_type) { |
| 885 | case SOCK_DGRAM: |
| 886 | break; |
| 887 | case SOCK_SEQPACKET: |
| 888 | break; |
| 889 | default: |
| 890 | sk_free(sk); |
| 891 | ax25_cb_put(ax25); |
| 892 | return NULL; |
| 893 | } |
| 894 | |
| 895 | sock_init_data(NULL, sk); |
| 896 | |
| 897 | sk->sk_destruct = ax25_free_sock; |
| 898 | sk->sk_type = osk->sk_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | sk->sk_priority = osk->sk_priority; |
| 900 | sk->sk_protocol = osk->sk_protocol; |
| 901 | sk->sk_rcvbuf = osk->sk_rcvbuf; |
| 902 | sk->sk_sndbuf = osk->sk_sndbuf; |
| 903 | sk->sk_state = TCP_ESTABLISHED; |
Ralf Baechle | 53b924b | 2005-08-23 10:11:30 -0700 | [diff] [blame] | 904 | sock_copy_flags(sk, osk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | |
| 906 | oax25 = ax25_sk(osk); |
| 907 | |
| 908 | ax25->modulus = oax25->modulus; |
| 909 | ax25->backoff = oax25->backoff; |
| 910 | ax25->pidincl = oax25->pidincl; |
| 911 | ax25->iamdigi = oax25->iamdigi; |
| 912 | ax25->rtt = oax25->rtt; |
| 913 | ax25->t1 = oax25->t1; |
| 914 | ax25->t2 = oax25->t2; |
| 915 | ax25->t3 = oax25->t3; |
| 916 | ax25->n2 = oax25->n2; |
| 917 | ax25->idle = oax25->idle; |
| 918 | ax25->paclen = oax25->paclen; |
| 919 | ax25->window = oax25->window; |
| 920 | |
| 921 | ax25->ax25_dev = ax25_dev; |
| 922 | ax25->source_addr = oax25->source_addr; |
| 923 | |
| 924 | if (oax25->digipeat != NULL) { |
Arnaldo Carvalho de Melo | 0459d70 | 2006-11-17 12:43:07 -0200 | [diff] [blame] | 925 | ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi), |
| 926 | GFP_ATOMIC); |
| 927 | if (ax25->digipeat == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | sk_free(sk); |
| 929 | ax25_cb_put(ax25); |
| 930 | return NULL; |
| 931 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | } |
| 933 | |
| 934 | sk->sk_protinfo = ax25; |
| 935 | ax25->sk = sk; |
| 936 | |
| 937 | return sk; |
| 938 | } |
| 939 | |
| 940 | static int ax25_release(struct socket *sock) |
| 941 | { |
| 942 | struct sock *sk = sock->sk; |
| 943 | ax25_cb *ax25; |
| 944 | |
| 945 | if (sk == NULL) |
| 946 | return 0; |
| 947 | |
| 948 | sock_hold(sk); |
| 949 | sock_orphan(sk); |
| 950 | lock_sock(sk); |
| 951 | ax25 = ax25_sk(sk); |
| 952 | |
| 953 | if (sk->sk_type == SOCK_SEQPACKET) { |
| 954 | switch (ax25->state) { |
| 955 | case AX25_STATE_0: |
| 956 | release_sock(sk); |
| 957 | ax25_disconnect(ax25, 0); |
| 958 | lock_sock(sk); |
| 959 | ax25_destroy_socket(ax25); |
| 960 | break; |
| 961 | |
| 962 | case AX25_STATE_1: |
| 963 | case AX25_STATE_2: |
| 964 | ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND); |
| 965 | release_sock(sk); |
| 966 | ax25_disconnect(ax25, 0); |
| 967 | lock_sock(sk); |
| 968 | ax25_destroy_socket(ax25); |
| 969 | break; |
| 970 | |
| 971 | case AX25_STATE_3: |
| 972 | case AX25_STATE_4: |
| 973 | ax25_clear_queues(ax25); |
| 974 | ax25->n2count = 0; |
| 975 | |
| 976 | switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) { |
| 977 | case AX25_PROTO_STD_SIMPLEX: |
| 978 | case AX25_PROTO_STD_DUPLEX: |
| 979 | ax25_send_control(ax25, |
| 980 | AX25_DISC, |
| 981 | AX25_POLLON, |
| 982 | AX25_COMMAND); |
| 983 | ax25_stop_t2timer(ax25); |
| 984 | ax25_stop_t3timer(ax25); |
| 985 | ax25_stop_idletimer(ax25); |
| 986 | break; |
| 987 | #ifdef CONFIG_AX25_DAMA_SLAVE |
| 988 | case AX25_PROTO_DAMA_SLAVE: |
| 989 | ax25_stop_t3timer(ax25); |
| 990 | ax25_stop_idletimer(ax25); |
| 991 | break; |
| 992 | #endif |
| 993 | } |
| 994 | ax25_calculate_t1(ax25); |
| 995 | ax25_start_t1timer(ax25); |
| 996 | ax25->state = AX25_STATE_2; |
| 997 | sk->sk_state = TCP_CLOSE; |
| 998 | sk->sk_shutdown |= SEND_SHUTDOWN; |
| 999 | sk->sk_state_change(sk); |
| 1000 | sock_set_flag(sk, SOCK_DESTROY); |
| 1001 | break; |
| 1002 | |
| 1003 | default: |
| 1004 | break; |
| 1005 | } |
| 1006 | } else { |
| 1007 | sk->sk_state = TCP_CLOSE; |
| 1008 | sk->sk_shutdown |= SEND_SHUTDOWN; |
| 1009 | sk->sk_state_change(sk); |
| 1010 | ax25_destroy_socket(ax25); |
| 1011 | } |
| 1012 | |
| 1013 | sock->sk = NULL; |
| 1014 | release_sock(sk); |
| 1015 | sock_put(sk); |
| 1016 | |
| 1017 | return 0; |
| 1018 | } |
| 1019 | |
| 1020 | /* |
| 1021 | * We support a funny extension here so you can (as root) give any callsign |
| 1022 | * digipeated via a local address as source. This hack is obsolete now |
| 1023 | * that we've implemented support for SO_BINDTODEVICE. It is however small |
| 1024 | * and trivially backward compatible. |
| 1025 | */ |
| 1026 | static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
| 1027 | { |
| 1028 | struct sock *sk = sock->sk; |
| 1029 | struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr; |
| 1030 | ax25_dev *ax25_dev = NULL; |
Ralf Baechle | 01d7dd0 | 2005-08-23 10:11:45 -0700 | [diff] [blame] | 1031 | ax25_uid_assoc *user; |
| 1032 | ax25_address call; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | ax25_cb *ax25; |
| 1034 | int err = 0; |
| 1035 | |
| 1036 | if (addr_len != sizeof(struct sockaddr_ax25) && |
maximilian attems | 1987e7b | 2008-01-28 20:44:11 -0800 | [diff] [blame] | 1037 | addr_len != sizeof(struct full_sockaddr_ax25)) |
| 1038 | /* support for old structure may go away some time |
| 1039 | * ax25_bind(): uses old (6 digipeater) socket structure. |
| 1040 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || |
maximilian attems | 1987e7b | 2008-01-28 20:44:11 -0800 | [diff] [blame] | 1042 | (addr_len > sizeof(struct full_sockaddr_ax25))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | |
| 1045 | if (addr->fsa_ax25.sax25_family != AF_AX25) |
| 1046 | return -EINVAL; |
| 1047 | |
Ralf Baechle | 01d7dd0 | 2005-08-23 10:11:45 -0700 | [diff] [blame] | 1048 | user = ax25_findbyuid(current->euid); |
| 1049 | if (user) { |
| 1050 | call = user->call; |
| 1051 | ax25_uid_put(user); |
| 1052 | } else { |
| 1053 | if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) |
| 1054 | return -EACCES; |
| 1055 | |
| 1056 | call = addr->fsa_ax25.sax25_call; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | } |
| 1058 | |
| 1059 | lock_sock(sk); |
| 1060 | |
| 1061 | ax25 = ax25_sk(sk); |
| 1062 | if (!sock_flag(sk, SOCK_ZAPPED)) { |
| 1063 | err = -EINVAL; |
| 1064 | goto out; |
| 1065 | } |
| 1066 | |
Ralf Baechle | 01d7dd0 | 2005-08-23 10:11:45 -0700 | [diff] [blame] | 1067 | ax25->source_addr = call; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | |
| 1069 | /* |
| 1070 | * User already set interface with SO_BINDTODEVICE |
| 1071 | */ |
| 1072 | if (ax25->ax25_dev != NULL) |
| 1073 | goto done; |
| 1074 | |
| 1075 | if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) { |
| 1076 | if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 && |
| 1077 | (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) { |
| 1078 | err = -EADDRNOTAVAIL; |
| 1079 | goto out; |
| 1080 | } |
| 1081 | } else { |
| 1082 | if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) { |
| 1083 | err = -EADDRNOTAVAIL; |
| 1084 | goto out; |
| 1085 | } |
| 1086 | } |
| 1087 | |
| 1088 | if (ax25_dev != NULL) |
| 1089 | ax25_fillin_cb(ax25, ax25_dev); |
| 1090 | |
| 1091 | done: |
| 1092 | ax25_cb_add(ax25); |
| 1093 | sock_reset_flag(sk, SOCK_ZAPPED); |
| 1094 | |
| 1095 | out: |
| 1096 | release_sock(sk); |
| 1097 | |
| 1098 | return 0; |
| 1099 | } |
| 1100 | |
| 1101 | /* |
| 1102 | * FIXME: nonblock behaviour looks like it may have a bug. |
| 1103 | */ |
Ralf Baechle | c9266b9 | 2006-12-14 15:49:28 -0800 | [diff] [blame] | 1104 | static int __must_check ax25_connect(struct socket *sock, |
| 1105 | struct sockaddr *uaddr, int addr_len, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | { |
| 1107 | struct sock *sk = sock->sk; |
| 1108 | ax25_cb *ax25 = ax25_sk(sk), *ax25t; |
| 1109 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr; |
| 1110 | ax25_digi *digi = NULL; |
| 1111 | int ct = 0, err = 0; |
| 1112 | |
| 1113 | /* |
| 1114 | * some sanity checks. code further down depends on this |
| 1115 | */ |
| 1116 | |
maximilian attems | 27d1cba | 2008-01-10 03:57:29 -0800 | [diff] [blame] | 1117 | if (addr_len == sizeof(struct sockaddr_ax25)) |
| 1118 | /* support for this will go away in early 2.5.x |
| 1119 | * ax25_connect(): uses obsolete socket structure |
| 1120 | */ |
| 1121 | ; |
| 1122 | else if (addr_len != sizeof(struct full_sockaddr_ax25)) |
| 1123 | /* support for old structure may go away some time |
| 1124 | * ax25_connect(): uses old (6 digipeater) socket structure. |
| 1125 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || |
maximilian attems | 27d1cba | 2008-01-10 03:57:29 -0800 | [diff] [blame] | 1127 | (addr_len > sizeof(struct full_sockaddr_ax25))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | |
| 1131 | if (fsa->fsa_ax25.sax25_family != AF_AX25) |
| 1132 | return -EINVAL; |
| 1133 | |
| 1134 | lock_sock(sk); |
| 1135 | |
| 1136 | /* deal with restarts */ |
| 1137 | if (sock->state == SS_CONNECTING) { |
| 1138 | switch (sk->sk_state) { |
| 1139 | case TCP_SYN_SENT: /* still trying */ |
| 1140 | err = -EINPROGRESS; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1141 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | |
| 1143 | case TCP_ESTABLISHED: /* connection established */ |
| 1144 | sock->state = SS_CONNECTED; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1145 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | |
| 1147 | case TCP_CLOSE: /* connection refused */ |
| 1148 | sock->state = SS_UNCONNECTED; |
| 1149 | err = -ECONNREFUSED; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1150 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | } |
| 1152 | } |
| 1153 | |
| 1154 | if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) { |
| 1155 | err = -EISCONN; /* No reconnect on a seqpacket socket */ |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1156 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | } |
| 1158 | |
| 1159 | sk->sk_state = TCP_CLOSE; |
| 1160 | sock->state = SS_UNCONNECTED; |
| 1161 | |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 1162 | kfree(ax25->digipeat); |
| 1163 | ax25->digipeat = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | |
| 1165 | /* |
| 1166 | * Handle digi-peaters to be used. |
| 1167 | */ |
| 1168 | if (addr_len > sizeof(struct sockaddr_ax25) && |
| 1169 | fsa->fsa_ax25.sax25_ndigis != 0) { |
| 1170 | /* Valid number of digipeaters ? */ |
| 1171 | if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) { |
| 1172 | err = -EINVAL; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1173 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | } |
| 1175 | |
| 1176 | if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) { |
| 1177 | err = -ENOBUFS; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1178 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | } |
| 1180 | |
| 1181 | digi->ndigi = fsa->fsa_ax25.sax25_ndigis; |
| 1182 | digi->lastrepeat = -1; |
| 1183 | |
| 1184 | while (ct < fsa->fsa_ax25.sax25_ndigis) { |
| 1185 | if ((fsa->fsa_digipeater[ct].ax25_call[6] & |
| 1186 | AX25_HBIT) && ax25->iamdigi) { |
| 1187 | digi->repeated[ct] = 1; |
| 1188 | digi->lastrepeat = ct; |
| 1189 | } else { |
| 1190 | digi->repeated[ct] = 0; |
| 1191 | } |
| 1192 | digi->calls[ct] = fsa->fsa_digipeater[ct]; |
| 1193 | ct++; |
| 1194 | } |
| 1195 | } |
| 1196 | |
| 1197 | /* |
| 1198 | * Must bind first - autobinding in this may or may not work. If |
| 1199 | * the socket is already bound, check to see if the device has |
| 1200 | * been filled in, error if it hasn't. |
| 1201 | */ |
| 1202 | if (sock_flag(sk, SOCK_ZAPPED)) { |
| 1203 | /* check if we can remove this feature. It is broken. */ |
| 1204 | printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n", |
| 1205 | current->comm); |
| 1206 | if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) { |
| 1207 | kfree(digi); |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1208 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | } |
| 1210 | |
| 1211 | ax25_fillin_cb(ax25, ax25->ax25_dev); |
| 1212 | ax25_cb_add(ax25); |
| 1213 | } else { |
| 1214 | if (ax25->ax25_dev == NULL) { |
| 1215 | kfree(digi); |
| 1216 | err = -EHOSTUNREACH; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1217 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | } |
| 1219 | } |
| 1220 | |
| 1221 | if (sk->sk_type == SOCK_SEQPACKET && |
| 1222 | (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi, |
YOSHIFUJI Hideaki | 528930b | 2007-02-09 23:24:31 +0900 | [diff] [blame] | 1223 | ax25->ax25_dev->dev))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | kfree(digi); |
| 1225 | err = -EADDRINUSE; /* Already such a connection */ |
| 1226 | ax25_cb_put(ax25t); |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1227 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | } |
| 1229 | |
| 1230 | ax25->dest_addr = fsa->fsa_ax25.sax25_call; |
| 1231 | ax25->digipeat = digi; |
| 1232 | |
| 1233 | /* First the easy one */ |
| 1234 | if (sk->sk_type != SOCK_SEQPACKET) { |
| 1235 | sock->state = SS_CONNECTED; |
| 1236 | sk->sk_state = TCP_ESTABLISHED; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1237 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | } |
| 1239 | |
| 1240 | /* Move to connecting socket, ax.25 lapb WAIT_UA.. */ |
| 1241 | sock->state = SS_CONNECTING; |
| 1242 | sk->sk_state = TCP_SYN_SENT; |
| 1243 | |
| 1244 | switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) { |
| 1245 | case AX25_PROTO_STD_SIMPLEX: |
| 1246 | case AX25_PROTO_STD_DUPLEX: |
| 1247 | ax25_std_establish_data_link(ax25); |
| 1248 | break; |
| 1249 | |
| 1250 | #ifdef CONFIG_AX25_DAMA_SLAVE |
| 1251 | case AX25_PROTO_DAMA_SLAVE: |
| 1252 | ax25->modulus = AX25_MODULUS; |
| 1253 | ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW]; |
| 1254 | if (ax25->ax25_dev->dama.slave) |
| 1255 | ax25_ds_establish_data_link(ax25); |
| 1256 | else |
| 1257 | ax25_std_establish_data_link(ax25); |
| 1258 | break; |
| 1259 | #endif |
| 1260 | } |
| 1261 | |
| 1262 | ax25->state = AX25_STATE_1; |
| 1263 | |
| 1264 | ax25_start_heartbeat(ax25); |
| 1265 | |
| 1266 | /* Now the loop */ |
| 1267 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { |
| 1268 | err = -EINPROGRESS; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1269 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | } |
| 1271 | |
| 1272 | if (sk->sk_state == TCP_SYN_SENT) { |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1273 | DEFINE_WAIT(wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | for (;;) { |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1276 | prepare_to_wait(sk->sk_sleep, &wait, |
YOSHIFUJI Hideaki | bd3b071 | 2007-07-19 10:43:13 +0900 | [diff] [blame] | 1277 | TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | if (sk->sk_state != TCP_SYN_SENT) |
| 1279 | break; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1280 | if (!signal_pending(current)) { |
| 1281 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | schedule(); |
| 1283 | lock_sock(sk); |
| 1284 | continue; |
| 1285 | } |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1286 | err = -ERESTARTSYS; |
| 1287 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | } |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1289 | finish_wait(sk->sk_sleep, &wait); |
| 1290 | |
| 1291 | if (err) |
| 1292 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | } |
| 1294 | |
| 1295 | if (sk->sk_state != TCP_ESTABLISHED) { |
| 1296 | /* Not in ABM, not in WAIT_UA -> failed */ |
| 1297 | sock->state = SS_UNCONNECTED; |
| 1298 | err = sock_error(sk); /* Always set at this point */ |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1299 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | } |
| 1301 | |
| 1302 | sock->state = SS_CONNECTED; |
| 1303 | |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1304 | err = 0; |
| 1305 | out_release: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | release_sock(sk); |
| 1307 | |
| 1308 | return err; |
| 1309 | } |
| 1310 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | static int ax25_accept(struct socket *sock, struct socket *newsock, int flags) |
| 1312 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | struct sk_buff *skb; |
| 1314 | struct sock *newsk; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1315 | DEFINE_WAIT(wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | struct sock *sk; |
| 1317 | int err = 0; |
| 1318 | |
| 1319 | if (sock->state != SS_UNCONNECTED) |
| 1320 | return -EINVAL; |
| 1321 | |
| 1322 | if ((sk = sock->sk) == NULL) |
| 1323 | return -EINVAL; |
| 1324 | |
| 1325 | lock_sock(sk); |
| 1326 | if (sk->sk_type != SOCK_SEQPACKET) { |
| 1327 | err = -EOPNOTSUPP; |
| 1328 | goto out; |
| 1329 | } |
| 1330 | |
| 1331 | if (sk->sk_state != TCP_LISTEN) { |
| 1332 | err = -EINVAL; |
| 1333 | goto out; |
| 1334 | } |
| 1335 | |
| 1336 | /* |
| 1337 | * The read queue this time is holding sockets ready to use |
| 1338 | * hooked into the SABM we saved |
| 1339 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | for (;;) { |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1341 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | skb = skb_dequeue(&sk->sk_receive_queue); |
| 1343 | if (skb) |
| 1344 | break; |
| 1345 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | if (flags & O_NONBLOCK) { |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1347 | err = -EWOULDBLOCK; |
| 1348 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | } |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1350 | if (!signal_pending(current)) { |
| 1351 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | schedule(); |
| 1353 | lock_sock(sk); |
| 1354 | continue; |
| 1355 | } |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1356 | err = -ERESTARTSYS; |
| 1357 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | } |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 1359 | finish_wait(sk->sk_sleep, &wait); |
| 1360 | |
| 1361 | if (err) |
| 1362 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | |
| 1364 | newsk = skb->sk; |
David S. Miller | 9375cb8 | 2008-06-17 02:20:54 -0700 | [diff] [blame] | 1365 | sock_graft(newsk, newsock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | |
| 1367 | /* Now attach up the new socket */ |
| 1368 | kfree_skb(skb); |
| 1369 | sk->sk_ack_backlog--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | newsock->state = SS_CONNECTED; |
| 1371 | |
| 1372 | out: |
| 1373 | release_sock(sk); |
| 1374 | |
| 1375 | return err; |
| 1376 | } |
| 1377 | |
| 1378 | static int ax25_getname(struct socket *sock, struct sockaddr *uaddr, |
| 1379 | int *uaddr_len, int peer) |
| 1380 | { |
| 1381 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr; |
| 1382 | struct sock *sk = sock->sk; |
| 1383 | unsigned char ndigi, i; |
| 1384 | ax25_cb *ax25; |
| 1385 | int err = 0; |
| 1386 | |
| 1387 | lock_sock(sk); |
| 1388 | ax25 = ax25_sk(sk); |
| 1389 | |
| 1390 | if (peer != 0) { |
| 1391 | if (sk->sk_state != TCP_ESTABLISHED) { |
| 1392 | err = -ENOTCONN; |
| 1393 | goto out; |
| 1394 | } |
| 1395 | |
| 1396 | fsa->fsa_ax25.sax25_family = AF_AX25; |
| 1397 | fsa->fsa_ax25.sax25_call = ax25->dest_addr; |
| 1398 | fsa->fsa_ax25.sax25_ndigis = 0; |
| 1399 | |
| 1400 | if (ax25->digipeat != NULL) { |
| 1401 | ndigi = ax25->digipeat->ndigi; |
| 1402 | fsa->fsa_ax25.sax25_ndigis = ndigi; |
| 1403 | for (i = 0; i < ndigi; i++) |
| 1404 | fsa->fsa_digipeater[i] = |
| 1405 | ax25->digipeat->calls[i]; |
| 1406 | } |
| 1407 | } else { |
| 1408 | fsa->fsa_ax25.sax25_family = AF_AX25; |
| 1409 | fsa->fsa_ax25.sax25_call = ax25->source_addr; |
| 1410 | fsa->fsa_ax25.sax25_ndigis = 1; |
| 1411 | if (ax25->ax25_dev != NULL) { |
| 1412 | memcpy(&fsa->fsa_digipeater[0], |
| 1413 | ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN); |
| 1414 | } else { |
| 1415 | fsa->fsa_digipeater[0] = null_ax25_address; |
| 1416 | } |
| 1417 | } |
| 1418 | *uaddr_len = sizeof (struct full_sockaddr_ax25); |
| 1419 | |
| 1420 | out: |
| 1421 | release_sock(sk); |
| 1422 | |
| 1423 | return err; |
| 1424 | } |
| 1425 | |
| 1426 | static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock, |
| 1427 | struct msghdr *msg, size_t len) |
| 1428 | { |
| 1429 | struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name; |
| 1430 | struct sock *sk = sock->sk; |
| 1431 | struct sockaddr_ax25 sax; |
| 1432 | struct sk_buff *skb; |
| 1433 | ax25_digi dtmp, *dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | ax25_cb *ax25; |
| 1435 | size_t size; |
| 1436 | int lv, err, addr_len = msg->msg_namelen; |
| 1437 | |
| 1438 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) |
| 1439 | return -EINVAL; |
| 1440 | |
| 1441 | lock_sock(sk); |
| 1442 | ax25 = ax25_sk(sk); |
| 1443 | |
| 1444 | if (sock_flag(sk, SOCK_ZAPPED)) { |
| 1445 | err = -EADDRNOTAVAIL; |
| 1446 | goto out; |
| 1447 | } |
| 1448 | |
| 1449 | if (sk->sk_shutdown & SEND_SHUTDOWN) { |
| 1450 | send_sig(SIGPIPE, current, 0); |
| 1451 | err = -EPIPE; |
| 1452 | goto out; |
| 1453 | } |
| 1454 | |
| 1455 | if (ax25->ax25_dev == NULL) { |
| 1456 | err = -ENETUNREACH; |
| 1457 | goto out; |
| 1458 | } |
| 1459 | |
| 1460 | if (len > ax25->ax25_dev->dev->mtu) { |
| 1461 | err = -EMSGSIZE; |
| 1462 | goto out; |
| 1463 | } |
YOSHIFUJI Hideaki | 528930b | 2007-02-09 23:24:31 +0900 | [diff] [blame] | 1464 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | if (usax != NULL) { |
| 1466 | if (usax->sax25_family != AF_AX25) { |
| 1467 | err = -EINVAL; |
| 1468 | goto out; |
| 1469 | } |
| 1470 | |
maximilian attems | 27d1cba | 2008-01-10 03:57:29 -0800 | [diff] [blame] | 1471 | if (addr_len == sizeof(struct sockaddr_ax25)) |
| 1472 | /* ax25_sendmsg(): uses obsolete socket structure */ |
| 1473 | ; |
| 1474 | else if (addr_len != sizeof(struct full_sockaddr_ax25)) |
| 1475 | /* support for old structure may go away some time |
| 1476 | * ax25_sendmsg(): uses old (6 digipeater) |
| 1477 | * socket structure. |
| 1478 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) || |
YOSHIFUJI Hideaki | 528930b | 2007-02-09 23:24:31 +0900 | [diff] [blame] | 1480 | (addr_len > sizeof(struct full_sockaddr_ax25))) { |
| 1481 | err = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | goto out; |
| 1483 | } |
| 1484 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1485 | |
| 1486 | if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) { |
| 1487 | int ct = 0; |
| 1488 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax; |
| 1489 | |
| 1490 | /* Valid number of digipeaters ? */ |
| 1491 | if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) { |
| 1492 | err = -EINVAL; |
| 1493 | goto out; |
| 1494 | } |
| 1495 | |
| 1496 | dtmp.ndigi = usax->sax25_ndigis; |
| 1497 | |
| 1498 | while (ct < usax->sax25_ndigis) { |
| 1499 | dtmp.repeated[ct] = 0; |
| 1500 | dtmp.calls[ct] = fsa->fsa_digipeater[ct]; |
| 1501 | ct++; |
| 1502 | } |
| 1503 | |
| 1504 | dtmp.lastrepeat = 0; |
| 1505 | } |
| 1506 | |
| 1507 | sax = *usax; |
| 1508 | if (sk->sk_type == SOCK_SEQPACKET && |
| 1509 | ax25cmp(&ax25->dest_addr, &sax.sax25_call)) { |
| 1510 | err = -EISCONN; |
| 1511 | goto out; |
| 1512 | } |
| 1513 | if (usax->sax25_ndigis == 0) |
| 1514 | dp = NULL; |
| 1515 | else |
| 1516 | dp = &dtmp; |
| 1517 | } else { |
| 1518 | /* |
| 1519 | * FIXME: 1003.1g - if the socket is like this because |
| 1520 | * it has become closed (not started closed) and is VC |
| 1521 | * we ought to SIGPIPE, EPIPE |
| 1522 | */ |
| 1523 | if (sk->sk_state != TCP_ESTABLISHED) { |
| 1524 | err = -ENOTCONN; |
| 1525 | goto out; |
| 1526 | } |
| 1527 | sax.sax25_family = AF_AX25; |
| 1528 | sax.sax25_call = ax25->dest_addr; |
| 1529 | dp = ax25->digipeat; |
| 1530 | } |
| 1531 | |
| 1532 | SOCK_DEBUG(sk, "AX.25: sendto: Addresses built.\n"); |
| 1533 | |
| 1534 | /* Build a packet */ |
| 1535 | SOCK_DEBUG(sk, "AX.25: sendto: building packet.\n"); |
| 1536 | |
| 1537 | /* Assume the worst case */ |
| 1538 | size = len + ax25->ax25_dev->dev->hard_header_len; |
| 1539 | |
| 1540 | skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err); |
| 1541 | if (skb == NULL) |
| 1542 | goto out; |
| 1543 | |
| 1544 | skb_reserve(skb, size - len); |
| 1545 | |
| 1546 | SOCK_DEBUG(sk, "AX.25: Appending user data\n"); |
| 1547 | |
| 1548 | /* User data follows immediately after the AX.25 data */ |
| 1549 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { |
| 1550 | err = -EFAULT; |
| 1551 | kfree_skb(skb); |
| 1552 | goto out; |
| 1553 | } |
| 1554 | |
Arnaldo Carvalho de Melo | c1d2bbe | 2007-04-10 20:45:18 -0700 | [diff] [blame] | 1555 | skb_reset_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | |
| 1557 | /* Add the PID if one is not supplied by the user in the skb */ |
Arnaldo Carvalho de Melo | 967b05f | 2007-03-13 13:51:52 -0300 | [diff] [blame] | 1558 | if (!ax25->pidincl) |
| 1559 | *skb_push(skb, 1) = sk->sk_protocol; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1560 | |
| 1561 | SOCK_DEBUG(sk, "AX.25: Transmitting buffer\n"); |
| 1562 | |
| 1563 | if (sk->sk_type == SOCK_SEQPACKET) { |
| 1564 | /* Connected mode sockets go via the LAPB machine */ |
| 1565 | if (sk->sk_state != TCP_ESTABLISHED) { |
| 1566 | kfree_skb(skb); |
| 1567 | err = -ENOTCONN; |
| 1568 | goto out; |
| 1569 | } |
| 1570 | |
| 1571 | /* Shove it onto the queue and kick */ |
| 1572 | ax25_output(ax25, ax25->paclen, skb); |
| 1573 | |
| 1574 | err = len; |
| 1575 | goto out; |
| 1576 | } |
| 1577 | |
Arnaldo Carvalho de Melo | 967b05f | 2007-03-13 13:51:52 -0300 | [diff] [blame] | 1578 | skb_push(skb, 1 + ax25_addr_size(dp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | |
| 1580 | SOCK_DEBUG(sk, "Building AX.25 Header (dp=%p).\n", dp); |
| 1581 | |
| 1582 | if (dp != NULL) |
| 1583 | SOCK_DEBUG(sk, "Num digipeaters=%d\n", dp->ndigi); |
| 1584 | |
| 1585 | /* Build an AX.25 header */ |
Arnaldo Carvalho de Melo | 967b05f | 2007-03-13 13:51:52 -0300 | [diff] [blame] | 1586 | lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call, |
| 1587 | dp, AX25_COMMAND, AX25_MODULUS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | |
| 1589 | SOCK_DEBUG(sk, "Built header (%d bytes)\n",lv); |
| 1590 | |
Arnaldo Carvalho de Melo | 967b05f | 2007-03-13 13:51:52 -0300 | [diff] [blame] | 1591 | skb_set_transport_header(skb, lv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 1593 | SOCK_DEBUG(sk, "base=%p pos=%p\n", |
| 1594 | skb->data, skb_transport_header(skb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1595 | |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 1596 | *skb_transport_header(skb) = AX25_UI; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | |
| 1598 | /* Datagram frames go straight out of the door as UI */ |
Arnaldo Carvalho de Melo | 29c4be5 | 2005-04-21 16:46:56 -0700 | [diff] [blame] | 1599 | ax25_queue_xmit(skb, ax25->ax25_dev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | |
| 1601 | err = len; |
| 1602 | |
| 1603 | out: |
| 1604 | release_sock(sk); |
| 1605 | |
| 1606 | return err; |
| 1607 | } |
| 1608 | |
| 1609 | static int ax25_recvmsg(struct kiocb *iocb, struct socket *sock, |
| 1610 | struct msghdr *msg, size_t size, int flags) |
| 1611 | { |
| 1612 | struct sock *sk = sock->sk; |
| 1613 | struct sk_buff *skb; |
| 1614 | int copied; |
| 1615 | int err = 0; |
| 1616 | |
| 1617 | lock_sock(sk); |
| 1618 | /* |
| 1619 | * This works for seqpacket too. The receiver has ordered the |
| 1620 | * queue for us! We do one quick check first though |
| 1621 | */ |
| 1622 | if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) { |
| 1623 | err = -ENOTCONN; |
| 1624 | goto out; |
| 1625 | } |
| 1626 | |
| 1627 | /* Now we can treat all alike */ |
| 1628 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, |
YOSHIFUJI Hideaki | 528930b | 2007-02-09 23:24:31 +0900 | [diff] [blame] | 1629 | flags & MSG_DONTWAIT, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | if (skb == NULL) |
| 1631 | goto out; |
| 1632 | |
| 1633 | if (!ax25_sk(sk)->pidincl) |
| 1634 | skb_pull(skb, 1); /* Remove PID */ |
| 1635 | |
Arnaldo Carvalho de Melo | badff6d | 2007-03-13 13:06:52 -0300 | [diff] [blame] | 1636 | skb_reset_transport_header(skb); |
| 1637 | copied = skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | |
| 1639 | if (copied > size) { |
| 1640 | copied = size; |
| 1641 | msg->msg_flags |= MSG_TRUNC; |
| 1642 | } |
| 1643 | |
| 1644 | skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
| 1645 | |
| 1646 | if (msg->msg_namelen != 0) { |
| 1647 | struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name; |
| 1648 | ax25_digi digi; |
| 1649 | ax25_address src; |
Arnaldo Carvalho de Melo | 98e399f | 2007-03-19 15:33:04 -0700 | [diff] [blame] | 1650 | const unsigned char *mac = skb_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | |
Arnaldo Carvalho de Melo | 98e399f | 2007-03-19 15:33:04 -0700 | [diff] [blame] | 1652 | ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL, |
| 1653 | &digi, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | sax->sax25_family = AF_AX25; |
| 1655 | /* We set this correctly, even though we may not let the |
| 1656 | application know the digi calls further down (because it |
| 1657 | did NOT ask to know them). This could get political... **/ |
| 1658 | sax->sax25_ndigis = digi.ndigi; |
| 1659 | sax->sax25_call = src; |
| 1660 | |
| 1661 | if (sax->sax25_ndigis != 0) { |
| 1662 | int ct; |
| 1663 | struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax; |
| 1664 | |
| 1665 | for (ct = 0; ct < digi.ndigi; ct++) |
| 1666 | fsa->fsa_digipeater[ct] = digi.calls[ct]; |
| 1667 | } |
| 1668 | msg->msg_namelen = sizeof(struct full_sockaddr_ax25); |
| 1669 | } |
| 1670 | |
| 1671 | skb_free_datagram(sk, skb); |
| 1672 | err = copied; |
| 1673 | |
| 1674 | out: |
| 1675 | release_sock(sk); |
| 1676 | |
| 1677 | return err; |
| 1678 | } |
| 1679 | |
| 1680 | static int ax25_shutdown(struct socket *sk, int how) |
| 1681 | { |
| 1682 | /* FIXME - generate DM and RNR states */ |
| 1683 | return -EOPNOTSUPP; |
| 1684 | } |
| 1685 | |
| 1686 | static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| 1687 | { |
| 1688 | struct sock *sk = sock->sk; |
| 1689 | void __user *argp = (void __user *)arg; |
| 1690 | int res = 0; |
| 1691 | |
| 1692 | lock_sock(sk); |
| 1693 | switch (cmd) { |
| 1694 | case TIOCOUTQ: { |
| 1695 | long amount; |
| 1696 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); |
| 1697 | if (amount < 0) |
| 1698 | amount = 0; |
| 1699 | res = put_user(amount, (int __user *)argp); |
| 1700 | break; |
| 1701 | } |
| 1702 | |
| 1703 | case TIOCINQ: { |
| 1704 | struct sk_buff *skb; |
| 1705 | long amount = 0L; |
| 1706 | /* These two are safe on a single CPU system as only user tasks fiddle here */ |
| 1707 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) |
| 1708 | amount = skb->len; |
Ralf Baechle | 20b7d10 | 2005-09-12 14:24:55 -0700 | [diff] [blame] | 1709 | res = put_user(amount, (int __user *) argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | break; |
| 1711 | } |
| 1712 | |
| 1713 | case SIOCGSTAMP: |
Ralf Baechle | 9b37ee7 | 2005-09-12 14:23:52 -0700 | [diff] [blame] | 1714 | res = sock_get_timestamp(sk, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | break; |
| 1716 | |
Eric Dumazet | ae40eb1 | 2007-03-18 17:33:16 -0700 | [diff] [blame] | 1717 | case SIOCGSTAMPNS: |
| 1718 | res = sock_get_timestampns(sk, argp); |
| 1719 | break; |
| 1720 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */ |
| 1722 | case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */ |
| 1723 | case SIOCAX25GETUID: { |
| 1724 | struct sockaddr_ax25 sax25; |
| 1725 | if (copy_from_user(&sax25, argp, sizeof(sax25))) { |
| 1726 | res = -EFAULT; |
| 1727 | break; |
| 1728 | } |
| 1729 | res = ax25_uid_ioctl(cmd, &sax25); |
| 1730 | break; |
| 1731 | } |
| 1732 | |
| 1733 | case SIOCAX25NOUID: { /* Set the default policy (default/bar) */ |
| 1734 | long amount; |
| 1735 | if (!capable(CAP_NET_ADMIN)) { |
| 1736 | res = -EPERM; |
| 1737 | break; |
| 1738 | } |
| 1739 | if (get_user(amount, (long __user *)argp)) { |
| 1740 | res = -EFAULT; |
| 1741 | break; |
| 1742 | } |
| 1743 | if (amount > AX25_NOUID_BLOCK) { |
| 1744 | res = -EINVAL; |
| 1745 | break; |
| 1746 | } |
| 1747 | ax25_uid_policy = amount; |
| 1748 | res = 0; |
| 1749 | break; |
| 1750 | } |
| 1751 | |
| 1752 | case SIOCADDRT: |
| 1753 | case SIOCDELRT: |
| 1754 | case SIOCAX25OPTRT: |
| 1755 | if (!capable(CAP_NET_ADMIN)) { |
| 1756 | res = -EPERM; |
| 1757 | break; |
| 1758 | } |
| 1759 | res = ax25_rt_ioctl(cmd, argp); |
| 1760 | break; |
| 1761 | |
| 1762 | case SIOCAX25CTLCON: |
| 1763 | if (!capable(CAP_NET_ADMIN)) { |
| 1764 | res = -EPERM; |
| 1765 | break; |
| 1766 | } |
| 1767 | res = ax25_ctl_ioctl(cmd, argp); |
| 1768 | break; |
| 1769 | |
| 1770 | case SIOCAX25GETINFO: |
| 1771 | case SIOCAX25GETINFOOLD: { |
| 1772 | ax25_cb *ax25 = ax25_sk(sk); |
| 1773 | struct ax25_info_struct ax25_info; |
| 1774 | |
| 1775 | ax25_info.t1 = ax25->t1 / HZ; |
| 1776 | ax25_info.t2 = ax25->t2 / HZ; |
| 1777 | ax25_info.t3 = ax25->t3 / HZ; |
| 1778 | ax25_info.idle = ax25->idle / (60 * HZ); |
| 1779 | ax25_info.n2 = ax25->n2; |
| 1780 | ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ; |
| 1781 | ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ; |
| 1782 | ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ; |
| 1783 | ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ); |
| 1784 | ax25_info.n2count = ax25->n2count; |
| 1785 | ax25_info.state = ax25->state; |
| 1786 | ax25_info.rcv_q = atomic_read(&sk->sk_rmem_alloc); |
| 1787 | ax25_info.snd_q = atomic_read(&sk->sk_wmem_alloc); |
| 1788 | ax25_info.vs = ax25->vs; |
| 1789 | ax25_info.vr = ax25->vr; |
| 1790 | ax25_info.va = ax25->va; |
| 1791 | ax25_info.vs_max = ax25->vs; /* reserved */ |
| 1792 | ax25_info.paclen = ax25->paclen; |
| 1793 | ax25_info.window = ax25->window; |
| 1794 | |
| 1795 | /* old structure? */ |
| 1796 | if (cmd == SIOCAX25GETINFOOLD) { |
| 1797 | static int warned = 0; |
| 1798 | if (!warned) { |
| 1799 | printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n", |
| 1800 | current->comm); |
| 1801 | warned=1; |
| 1802 | } |
| 1803 | |
| 1804 | if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) { |
| 1805 | res = -EFAULT; |
| 1806 | break; |
| 1807 | } |
| 1808 | } else { |
| 1809 | if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) { |
| 1810 | res = -EINVAL; |
| 1811 | break; |
| 1812 | } |
| 1813 | } |
| 1814 | res = 0; |
| 1815 | break; |
| 1816 | } |
| 1817 | |
| 1818 | case SIOCAX25ADDFWD: |
| 1819 | case SIOCAX25DELFWD: { |
| 1820 | struct ax25_fwd_struct ax25_fwd; |
| 1821 | if (!capable(CAP_NET_ADMIN)) { |
| 1822 | res = -EPERM; |
| 1823 | break; |
| 1824 | } |
| 1825 | if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) { |
| 1826 | res = -EFAULT; |
| 1827 | break; |
| 1828 | } |
| 1829 | res = ax25_fwd_ioctl(cmd, &ax25_fwd); |
| 1830 | break; |
| 1831 | } |
| 1832 | |
| 1833 | case SIOCGIFADDR: |
| 1834 | case SIOCSIFADDR: |
| 1835 | case SIOCGIFDSTADDR: |
| 1836 | case SIOCSIFDSTADDR: |
| 1837 | case SIOCGIFBRDADDR: |
| 1838 | case SIOCSIFBRDADDR: |
| 1839 | case SIOCGIFNETMASK: |
| 1840 | case SIOCSIFNETMASK: |
| 1841 | case SIOCGIFMETRIC: |
| 1842 | case SIOCSIFMETRIC: |
| 1843 | res = -EINVAL; |
| 1844 | break; |
| 1845 | |
| 1846 | default: |
Christoph Hellwig | b5e5fa5 | 2006-01-03 14:18:33 -0800 | [diff] [blame] | 1847 | res = -ENOIOCTLCMD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | break; |
| 1849 | } |
| 1850 | release_sock(sk); |
| 1851 | |
| 1852 | return res; |
| 1853 | } |
| 1854 | |
| 1855 | #ifdef CONFIG_PROC_FS |
| 1856 | |
| 1857 | static void *ax25_info_start(struct seq_file *seq, loff_t *pos) |
Eric Dumazet | f16f302 | 2008-01-13 22:29:41 -0800 | [diff] [blame] | 1858 | __acquires(ax25_list_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | { |
| 1860 | struct ax25_cb *ax25; |
| 1861 | struct hlist_node *node; |
| 1862 | int i = 0; |
| 1863 | |
| 1864 | spin_lock_bh(&ax25_list_lock); |
| 1865 | ax25_for_each(ax25, node, &ax25_list) { |
| 1866 | if (i == *pos) |
| 1867 | return ax25; |
| 1868 | ++i; |
| 1869 | } |
| 1870 | return NULL; |
| 1871 | } |
| 1872 | |
| 1873 | static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos) |
| 1874 | { |
| 1875 | ++*pos; |
| 1876 | |
| 1877 | return hlist_entry( ((struct ax25_cb *)v)->ax25_node.next, |
| 1878 | struct ax25_cb, ax25_node); |
| 1879 | } |
YOSHIFUJI Hideaki | 528930b | 2007-02-09 23:24:31 +0900 | [diff] [blame] | 1880 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | static void ax25_info_stop(struct seq_file *seq, void *v) |
Eric Dumazet | f16f302 | 2008-01-13 22:29:41 -0800 | [diff] [blame] | 1882 | __releases(ax25_list_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1883 | { |
| 1884 | spin_unlock_bh(&ax25_list_lock); |
| 1885 | } |
| 1886 | |
| 1887 | static int ax25_info_show(struct seq_file *seq, void *v) |
| 1888 | { |
| 1889 | ax25_cb *ax25 = v; |
Ralf Baechle | f75268c | 2005-09-06 15:49:39 -0700 | [diff] [blame] | 1890 | char buf[11]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1891 | int k; |
| 1892 | |
| 1893 | |
| 1894 | /* |
| 1895 | * New format: |
| 1896 | * magic dev src_addr dest_addr,digi1,digi2,.. st vs vr va t1 t1 t2 t2 t3 t3 idle idle n2 n2 rtt window paclen Snd-Q Rcv-Q inode |
| 1897 | */ |
| 1898 | |
| 1899 | seq_printf(seq, "%8.8lx %s %s%s ", |
| 1900 | (long) ax25, |
| 1901 | ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name, |
Ralf Baechle | f75268c | 2005-09-06 15:49:39 -0700 | [diff] [blame] | 1902 | ax2asc(buf, &ax25->source_addr), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | ax25->iamdigi? "*":""); |
Ralf Baechle | f75268c | 2005-09-06 15:49:39 -0700 | [diff] [blame] | 1904 | seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | |
| 1906 | for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) { |
| 1907 | seq_printf(seq, ",%s%s", |
Ralf Baechle | f75268c | 2005-09-06 15:49:39 -0700 | [diff] [blame] | 1908 | ax2asc(buf, &ax25->digipeat->calls[k]), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | ax25->digipeat->repeated[k]? "*":""); |
| 1910 | } |
| 1911 | |
| 1912 | seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d", |
| 1913 | ax25->state, |
| 1914 | ax25->vs, ax25->vr, ax25->va, |
| 1915 | ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ, |
| 1916 | ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ, |
| 1917 | ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ, |
| 1918 | ax25_display_timer(&ax25->idletimer) / (60 * HZ), |
| 1919 | ax25->idle / (60 * HZ), |
| 1920 | ax25->n2count, ax25->n2, |
| 1921 | ax25->rtt / HZ, |
| 1922 | ax25->window, |
| 1923 | ax25->paclen); |
| 1924 | |
| 1925 | if (ax25->sk != NULL) { |
Jarek Poplawski | 1105b5d | 2008-02-11 21:24:56 -0800 | [diff] [blame] | 1926 | seq_printf(seq, " %d %d %lu\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1927 | atomic_read(&ax25->sk->sk_wmem_alloc), |
| 1928 | atomic_read(&ax25->sk->sk_rmem_alloc), |
Jarek Poplawski | 1105b5d | 2008-02-11 21:24:56 -0800 | [diff] [blame] | 1929 | sock_i_ino(ax25->sk)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1930 | } else { |
| 1931 | seq_puts(seq, " * * *\n"); |
| 1932 | } |
| 1933 | return 0; |
| 1934 | } |
| 1935 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 1936 | static const struct seq_operations ax25_info_seqops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1937 | .start = ax25_info_start, |
| 1938 | .next = ax25_info_next, |
| 1939 | .stop = ax25_info_stop, |
| 1940 | .show = ax25_info_show, |
| 1941 | }; |
| 1942 | |
| 1943 | static int ax25_info_open(struct inode *inode, struct file *file) |
| 1944 | { |
| 1945 | return seq_open(file, &ax25_info_seqops); |
| 1946 | } |
| 1947 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 1948 | static const struct file_operations ax25_info_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1949 | .owner = THIS_MODULE, |
| 1950 | .open = ax25_info_open, |
| 1951 | .read = seq_read, |
| 1952 | .llseek = seq_lseek, |
| 1953 | .release = seq_release, |
| 1954 | }; |
| 1955 | |
| 1956 | #endif |
| 1957 | |
| 1958 | static struct net_proto_family ax25_family_ops = { |
| 1959 | .family = PF_AX25, |
| 1960 | .create = ax25_create, |
| 1961 | .owner = THIS_MODULE, |
| 1962 | }; |
| 1963 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 1964 | static const struct proto_ops ax25_proto_ops = { |
Ralf Baechle | 4676356 | 2005-09-12 14:25:25 -0700 | [diff] [blame] | 1965 | .family = PF_AX25, |
| 1966 | .owner = THIS_MODULE, |
| 1967 | .release = ax25_release, |
| 1968 | .bind = ax25_bind, |
| 1969 | .connect = ax25_connect, |
| 1970 | .socketpair = sock_no_socketpair, |
| 1971 | .accept = ax25_accept, |
| 1972 | .getname = ax25_getname, |
| 1973 | .poll = datagram_poll, |
| 1974 | .ioctl = ax25_ioctl, |
| 1975 | .listen = ax25_listen, |
| 1976 | .shutdown = ax25_shutdown, |
| 1977 | .setsockopt = ax25_setsockopt, |
| 1978 | .getsockopt = ax25_getsockopt, |
| 1979 | .sendmsg = ax25_sendmsg, |
| 1980 | .recvmsg = ax25_recvmsg, |
| 1981 | .mmap = sock_no_mmap, |
| 1982 | .sendpage = sock_no_sendpage, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1983 | }; |
| 1984 | |
| 1985 | /* |
| 1986 | * Called by socket.c on kernel start up |
| 1987 | */ |
| 1988 | static struct packet_type ax25_packet_type = { |
| 1989 | .type = __constant_htons(ETH_P_AX25), |
| 1990 | .dev = NULL, /* All devices */ |
| 1991 | .func = ax25_kiss_rcv, |
| 1992 | }; |
| 1993 | |
| 1994 | static struct notifier_block ax25_dev_notifier = { |
| 1995 | .notifier_call =ax25_device_event, |
| 1996 | }; |
| 1997 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1998 | static int __init ax25_init(void) |
| 1999 | { |
| 2000 | int rc = proto_register(&ax25_proto, 0); |
| 2001 | |
| 2002 | if (rc != 0) |
| 2003 | goto out; |
| 2004 | |
| 2005 | sock_register(&ax25_family_ops); |
| 2006 | dev_add_pack(&ax25_packet_type); |
| 2007 | register_netdevice_notifier(&ax25_dev_notifier); |
| 2008 | ax25_register_sysctl(); |
| 2009 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 2010 | proc_net_fops_create(&init_net, "ax25_route", S_IRUGO, &ax25_route_fops); |
| 2011 | proc_net_fops_create(&init_net, "ax25", S_IRUGO, &ax25_info_fops); |
| 2012 | proc_net_fops_create(&init_net, "ax25_calls", S_IRUGO, &ax25_uid_fops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2013 | out: |
| 2014 | return rc; |
| 2015 | } |
| 2016 | module_init(ax25_init); |
| 2017 | |
| 2018 | |
| 2019 | MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); |
| 2020 | MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol"); |
| 2021 | MODULE_LICENSE("GPL"); |
| 2022 | MODULE_ALIAS_NETPROTO(PF_AX25); |
| 2023 | |
| 2024 | static void __exit ax25_exit(void) |
| 2025 | { |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 2026 | proc_net_remove(&init_net, "ax25_route"); |
| 2027 | proc_net_remove(&init_net, "ax25"); |
| 2028 | proc_net_remove(&init_net, "ax25_calls"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | ax25_rt_free(); |
| 2030 | ax25_uid_free(); |
| 2031 | ax25_dev_free(); |
| 2032 | |
| 2033 | ax25_unregister_sysctl(); |
| 2034 | unregister_netdevice_notifier(&ax25_dev_notifier); |
| 2035 | |
| 2036 | dev_remove_pack(&ax25_packet_type); |
| 2037 | |
| 2038 | sock_unregister(PF_AX25); |
| 2039 | proto_unregister(&ax25_proto); |
| 2040 | } |
| 2041 | module_exit(ax25_exit); |