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 Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) |
| 8 | * Copyright Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk) |
| 9 | * Copyright Darryl Miles G7LED (dlm@g7led.demon.co.uk) |
| 10 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/module.h> |
| 12 | #include <linux/moduleparam.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 13 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/errno.h> |
| 15 | #include <linux/types.h> |
| 16 | #include <linux/socket.h> |
| 17 | #include <linux/in.h> |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/sched.h> |
| 20 | #include <linux/timer.h> |
| 21 | #include <linux/string.h> |
| 22 | #include <linux/sockios.h> |
| 23 | #include <linux/net.h> |
| 24 | #include <linux/stat.h> |
| 25 | #include <net/ax25.h> |
| 26 | #include <linux/inet.h> |
| 27 | #include <linux/netdevice.h> |
| 28 | #include <linux/if_arp.h> |
| 29 | #include <linux/skbuff.h> |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 30 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <net/sock.h> |
| 32 | #include <asm/uaccess.h> |
| 33 | #include <asm/system.h> |
| 34 | #include <linux/fcntl.h> |
| 35 | #include <linux/termios.h> /* For TIOCINQ/OUTQ */ |
| 36 | #include <linux/mm.h> |
| 37 | #include <linux/interrupt.h> |
| 38 | #include <linux/notifier.h> |
| 39 | #include <net/netrom.h> |
| 40 | #include <linux/proc_fs.h> |
| 41 | #include <linux/seq_file.h> |
| 42 | #include <net/ip.h> |
Arnaldo Carvalho de Melo | c752f07 | 2005-08-09 20:08:28 -0700 | [diff] [blame] | 43 | #include <net/tcp_states.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <net/arp.h> |
| 45 | #include <linux/init.h> |
| 46 | |
| 47 | static int nr_ndevs = 4; |
| 48 | |
| 49 | int sysctl_netrom_default_path_quality = NR_DEFAULT_QUAL; |
| 50 | int sysctl_netrom_obsolescence_count_initialiser = NR_DEFAULT_OBS; |
| 51 | int sysctl_netrom_network_ttl_initialiser = NR_DEFAULT_TTL; |
| 52 | int sysctl_netrom_transport_timeout = NR_DEFAULT_T1; |
| 53 | int sysctl_netrom_transport_maximum_tries = NR_DEFAULT_N2; |
| 54 | int sysctl_netrom_transport_acknowledge_delay = NR_DEFAULT_T2; |
| 55 | int sysctl_netrom_transport_busy_delay = NR_DEFAULT_T4; |
| 56 | int sysctl_netrom_transport_requested_window_size = NR_DEFAULT_WINDOW; |
| 57 | int sysctl_netrom_transport_no_activity_timeout = NR_DEFAULT_IDLE; |
| 58 | int sysctl_netrom_routing_control = NR_DEFAULT_ROUTING; |
| 59 | int sysctl_netrom_link_fails_count = NR_DEFAULT_FAILS; |
Ralf Baechle | e21ce8c | 2005-09-12 14:27:37 -0700 | [diff] [blame] | 60 | int sysctl_netrom_reset_circuit = NR_DEFAULT_RESET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
| 62 | static unsigned short circuit = 0x101; |
| 63 | |
| 64 | static HLIST_HEAD(nr_list); |
| 65 | static DEFINE_SPINLOCK(nr_list_lock); |
| 66 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 67 | static const struct proto_ops nr_proto_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
| 69 | /* |
Ralf Baechle | 4b260a9 | 2006-07-12 13:26:26 -0700 | [diff] [blame] | 70 | * NETROM network devices are virtual network devices encapsulating NETROM |
| 71 | * frames into AX.25 which will be sent through an AX.25 device, so form a |
| 72 | * special "super class" of normal net devices; split their locks off into a |
| 73 | * separate class since they always nest. |
| 74 | */ |
| 75 | static struct lock_class_key nr_netdev_xmit_lock_key; |
David S. Miller | cf508b1 | 2008-07-22 14:16:42 -0700 | [diff] [blame] | 76 | static struct lock_class_key nr_netdev_addr_lock_key; |
Ralf Baechle | 4b260a9 | 2006-07-12 13:26:26 -0700 | [diff] [blame] | 77 | |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 78 | static void nr_set_lockdep_one(struct net_device *dev, |
| 79 | struct netdev_queue *txq, |
| 80 | void *_unused) |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 81 | { |
| 82 | lockdep_set_class(&txq->_xmit_lock, &nr_netdev_xmit_lock_key); |
| 83 | } |
| 84 | |
| 85 | static void nr_set_lockdep_key(struct net_device *dev) |
| 86 | { |
David S. Miller | cf508b1 | 2008-07-22 14:16:42 -0700 | [diff] [blame] | 87 | lockdep_set_class(&dev->addr_list_lock, &nr_netdev_addr_lock_key); |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 88 | netdev_for_each_tx_queue(dev, nr_set_lockdep_one, NULL); |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 89 | } |
| 90 | |
Ralf Baechle | 4b260a9 | 2006-07-12 13:26:26 -0700 | [diff] [blame] | 91 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | * Socket removal during an interrupt is now safe. |
| 93 | */ |
| 94 | static void nr_remove_socket(struct sock *sk) |
| 95 | { |
| 96 | spin_lock_bh(&nr_list_lock); |
| 97 | sk_del_node_init(sk); |
| 98 | spin_unlock_bh(&nr_list_lock); |
| 99 | } |
| 100 | |
| 101 | /* |
| 102 | * Kill all bound sockets on a dropped device. |
| 103 | */ |
| 104 | static void nr_kill_by_device(struct net_device *dev) |
| 105 | { |
| 106 | struct sock *s; |
| 107 | struct hlist_node *node; |
| 108 | |
| 109 | spin_lock_bh(&nr_list_lock); |
| 110 | sk_for_each(s, node, &nr_list) |
| 111 | if (nr_sk(s)->device == dev) |
| 112 | nr_disconnect(s, ENETUNREACH); |
| 113 | spin_unlock_bh(&nr_list_lock); |
| 114 | } |
| 115 | |
| 116 | /* |
| 117 | * Handle device status changes. |
| 118 | */ |
| 119 | static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr) |
| 120 | { |
| 121 | struct net_device *dev = (struct net_device *)ptr; |
| 122 | |
YOSHIFUJI Hideaki | 721499e | 2008-07-19 22:34:43 -0700 | [diff] [blame] | 123 | if (!net_eq(dev_net(dev), &init_net)) |
Eric W. Biederman | e9dc865 | 2007-09-12 13:02:17 +0200 | [diff] [blame] | 124 | return NOTIFY_DONE; |
| 125 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | if (event != NETDEV_DOWN) |
| 127 | return NOTIFY_DONE; |
| 128 | |
| 129 | nr_kill_by_device(dev); |
| 130 | nr_rt_device_down(dev); |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 131 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | return NOTIFY_DONE; |
| 133 | } |
| 134 | |
| 135 | /* |
| 136 | * Add a socket to the bound sockets list. |
| 137 | */ |
| 138 | static void nr_insert_socket(struct sock *sk) |
| 139 | { |
| 140 | spin_lock_bh(&nr_list_lock); |
| 141 | sk_add_node(sk, &nr_list); |
| 142 | spin_unlock_bh(&nr_list_lock); |
| 143 | } |
| 144 | |
| 145 | /* |
| 146 | * Find a socket that wants to accept the Connect Request we just |
| 147 | * received. |
| 148 | */ |
| 149 | static struct sock *nr_find_listener(ax25_address *addr) |
| 150 | { |
| 151 | struct sock *s; |
| 152 | struct hlist_node *node; |
| 153 | |
| 154 | spin_lock_bh(&nr_list_lock); |
| 155 | sk_for_each(s, node, &nr_list) |
| 156 | if (!ax25cmp(&nr_sk(s)->source_addr, addr) && |
| 157 | s->sk_state == TCP_LISTEN) { |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 158 | bh_lock_sock(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | goto found; |
| 160 | } |
| 161 | s = NULL; |
| 162 | found: |
| 163 | spin_unlock_bh(&nr_list_lock); |
| 164 | return s; |
| 165 | } |
| 166 | |
| 167 | /* |
| 168 | * Find a connected NET/ROM socket given my circuit IDs. |
| 169 | */ |
| 170 | static struct sock *nr_find_socket(unsigned char index, unsigned char id) |
| 171 | { |
| 172 | struct sock *s; |
| 173 | struct hlist_node *node; |
| 174 | |
| 175 | spin_lock_bh(&nr_list_lock); |
| 176 | sk_for_each(s, node, &nr_list) { |
| 177 | struct nr_sock *nr = nr_sk(s); |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | if (nr->my_index == index && nr->my_id == id) { |
| 180 | bh_lock_sock(s); |
| 181 | goto found; |
| 182 | } |
| 183 | } |
| 184 | s = NULL; |
| 185 | found: |
| 186 | spin_unlock_bh(&nr_list_lock); |
| 187 | return s; |
| 188 | } |
| 189 | |
| 190 | /* |
| 191 | * Find a connected NET/ROM socket given their circuit IDs. |
| 192 | */ |
| 193 | static struct sock *nr_find_peer(unsigned char index, unsigned char id, |
| 194 | ax25_address *dest) |
| 195 | { |
| 196 | struct sock *s; |
| 197 | struct hlist_node *node; |
| 198 | |
| 199 | spin_lock_bh(&nr_list_lock); |
| 200 | sk_for_each(s, node, &nr_list) { |
| 201 | struct nr_sock *nr = nr_sk(s); |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 202 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | if (nr->your_index == index && nr->your_id == id && |
| 204 | !ax25cmp(&nr->dest_addr, dest)) { |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 205 | bh_lock_sock(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | goto found; |
| 207 | } |
| 208 | } |
| 209 | s = NULL; |
| 210 | found: |
| 211 | spin_unlock_bh(&nr_list_lock); |
| 212 | return s; |
| 213 | } |
| 214 | |
| 215 | /* |
| 216 | * Find next free circuit ID. |
| 217 | */ |
| 218 | static unsigned short nr_find_next_circuit(void) |
| 219 | { |
| 220 | unsigned short id = circuit; |
| 221 | unsigned char i, j; |
| 222 | struct sock *sk; |
| 223 | |
| 224 | for (;;) { |
| 225 | i = id / 256; |
| 226 | j = id % 256; |
| 227 | |
| 228 | if (i != 0 && j != 0) { |
| 229 | if ((sk=nr_find_socket(i, j)) == NULL) |
| 230 | break; |
| 231 | bh_unlock_sock(sk); |
| 232 | } |
| 233 | |
| 234 | id++; |
| 235 | } |
| 236 | |
| 237 | return id; |
| 238 | } |
| 239 | |
| 240 | /* |
| 241 | * Deferred destroy. |
| 242 | */ |
| 243 | void nr_destroy_socket(struct sock *); |
| 244 | |
| 245 | /* |
| 246 | * Handler for deferred kills. |
| 247 | */ |
| 248 | static void nr_destroy_timer(unsigned long data) |
| 249 | { |
| 250 | struct sock *sk=(struct sock *)data; |
| 251 | bh_lock_sock(sk); |
| 252 | sock_hold(sk); |
| 253 | nr_destroy_socket(sk); |
| 254 | bh_unlock_sock(sk); |
| 255 | sock_put(sk); |
| 256 | } |
| 257 | |
| 258 | /* |
| 259 | * This is called from user mode and the timers. Thus it protects itself |
| 260 | * against interrupt users but doesn't worry about being called during |
| 261 | * work. Once it is removed from the queue no interrupt or bottom half |
| 262 | * will touch it and we are (fairly 8-) ) safe. |
| 263 | */ |
| 264 | void nr_destroy_socket(struct sock *sk) |
| 265 | { |
| 266 | struct sk_buff *skb; |
| 267 | |
| 268 | nr_remove_socket(sk); |
| 269 | |
| 270 | nr_stop_heartbeat(sk); |
| 271 | nr_stop_t1timer(sk); |
| 272 | nr_stop_t2timer(sk); |
| 273 | nr_stop_t4timer(sk); |
| 274 | nr_stop_idletimer(sk); |
| 275 | |
| 276 | nr_clear_queues(sk); /* Flush the queues */ |
| 277 | |
| 278 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { |
| 279 | if (skb->sk != sk) { /* A pending connection */ |
| 280 | /* Queue the unaccepted socket for death */ |
| 281 | sock_set_flag(skb->sk, SOCK_DEAD); |
| 282 | nr_start_heartbeat(skb->sk); |
| 283 | nr_sk(skb->sk)->state = NR_STATE_0; |
| 284 | } |
| 285 | |
| 286 | kfree_skb(skb); |
| 287 | } |
| 288 | |
Eric Dumazet | c564039 | 2009-06-16 10:12:03 +0000 | [diff] [blame] | 289 | if (sk_has_allocations(sk)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | /* Defer: outstanding buffers */ |
| 291 | sk->sk_timer.function = nr_destroy_timer; |
| 292 | sk->sk_timer.expires = jiffies + 2 * HZ; |
| 293 | add_timer(&sk->sk_timer); |
| 294 | } else |
| 295 | sock_put(sk); |
| 296 | } |
| 297 | |
| 298 | /* |
| 299 | * Handling for system calls applied via the various interfaces to a |
| 300 | * NET/ROM socket object. |
| 301 | */ |
| 302 | |
| 303 | static int nr_setsockopt(struct socket *sock, int level, int optname, |
| 304 | char __user *optval, int optlen) |
| 305 | { |
| 306 | struct sock *sk = sock->sk; |
| 307 | struct nr_sock *nr = nr_sk(sk); |
| 308 | int opt; |
| 309 | |
| 310 | if (level != SOL_NETROM) |
| 311 | return -ENOPROTOOPT; |
| 312 | |
| 313 | if (optlen < sizeof(int)) |
| 314 | return -EINVAL; |
| 315 | |
| 316 | if (get_user(opt, (int __user *)optval)) |
| 317 | return -EFAULT; |
| 318 | |
| 319 | switch (optname) { |
| 320 | case NETROM_T1: |
| 321 | if (opt < 1) |
| 322 | return -EINVAL; |
| 323 | nr->t1 = opt * HZ; |
| 324 | return 0; |
| 325 | |
| 326 | case NETROM_T2: |
| 327 | if (opt < 1) |
| 328 | return -EINVAL; |
| 329 | nr->t2 = opt * HZ; |
| 330 | return 0; |
| 331 | |
| 332 | case NETROM_N2: |
| 333 | if (opt < 1 || opt > 31) |
| 334 | return -EINVAL; |
| 335 | nr->n2 = opt; |
| 336 | return 0; |
| 337 | |
| 338 | case NETROM_T4: |
| 339 | if (opt < 1) |
| 340 | return -EINVAL; |
| 341 | nr->t4 = opt * HZ; |
| 342 | return 0; |
| 343 | |
| 344 | case NETROM_IDLE: |
| 345 | if (opt < 0) |
| 346 | return -EINVAL; |
| 347 | nr->idle = opt * 60 * HZ; |
| 348 | return 0; |
| 349 | |
| 350 | default: |
| 351 | return -ENOPROTOOPT; |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | static int nr_getsockopt(struct socket *sock, int level, int optname, |
| 356 | char __user *optval, int __user *optlen) |
| 357 | { |
| 358 | struct sock *sk = sock->sk; |
| 359 | struct nr_sock *nr = nr_sk(sk); |
| 360 | int val = 0; |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 361 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
| 363 | if (level != SOL_NETROM) |
| 364 | return -ENOPROTOOPT; |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 365 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | if (get_user(len, optlen)) |
| 367 | return -EFAULT; |
| 368 | |
| 369 | if (len < 0) |
| 370 | return -EINVAL; |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 371 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | switch (optname) { |
| 373 | case NETROM_T1: |
| 374 | val = nr->t1 / HZ; |
| 375 | break; |
| 376 | |
| 377 | case NETROM_T2: |
| 378 | val = nr->t2 / HZ; |
| 379 | break; |
| 380 | |
| 381 | case NETROM_N2: |
| 382 | val = nr->n2; |
| 383 | break; |
| 384 | |
| 385 | case NETROM_T4: |
| 386 | val = nr->t4 / HZ; |
| 387 | break; |
| 388 | |
| 389 | case NETROM_IDLE: |
| 390 | val = nr->idle / (60 * HZ); |
| 391 | break; |
| 392 | |
| 393 | default: |
| 394 | return -ENOPROTOOPT; |
| 395 | } |
| 396 | |
| 397 | len = min_t(unsigned int, len, sizeof(int)); |
| 398 | |
| 399 | if (put_user(len, optlen)) |
| 400 | return -EFAULT; |
| 401 | |
| 402 | return copy_to_user(optval, &val, len) ? -EFAULT : 0; |
| 403 | } |
| 404 | |
| 405 | static int nr_listen(struct socket *sock, int backlog) |
| 406 | { |
| 407 | struct sock *sk = sock->sk; |
| 408 | |
| 409 | lock_sock(sk); |
| 410 | if (sk->sk_state != TCP_LISTEN) { |
| 411 | memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN); |
| 412 | sk->sk_max_ack_backlog = backlog; |
| 413 | sk->sk_state = TCP_LISTEN; |
| 414 | release_sock(sk); |
| 415 | return 0; |
| 416 | } |
| 417 | release_sock(sk); |
| 418 | |
| 419 | return -EOPNOTSUPP; |
| 420 | } |
| 421 | |
| 422 | static struct proto nr_proto = { |
| 423 | .name = "NETROM", |
| 424 | .owner = THIS_MODULE, |
| 425 | .obj_size = sizeof(struct nr_sock), |
| 426 | }; |
| 427 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 428 | static int nr_create(struct net *net, struct socket *sock, int protocol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | { |
| 430 | struct sock *sk; |
| 431 | struct nr_sock *nr; |
| 432 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 433 | if (net != &init_net) |
| 434 | return -EAFNOSUPPORT; |
| 435 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | if (sock->type != SOCK_SEQPACKET || protocol != 0) |
| 437 | return -ESOCKTNOSUPPORT; |
| 438 | |
Pavel Emelyanov | 6257ff2 | 2007-11-01 00:39:31 -0700 | [diff] [blame] | 439 | sk = sk_alloc(net, PF_NETROM, GFP_ATOMIC, &nr_proto); |
| 440 | if (sk == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | return -ENOMEM; |
| 442 | |
| 443 | nr = nr_sk(sk); |
| 444 | |
| 445 | sock_init_data(sock, sk); |
| 446 | |
| 447 | sock->ops = &nr_proto_ops; |
| 448 | sk->sk_protocol = protocol; |
| 449 | |
| 450 | skb_queue_head_init(&nr->ack_queue); |
| 451 | skb_queue_head_init(&nr->reseq_queue); |
| 452 | skb_queue_head_init(&nr->frag_queue); |
| 453 | |
| 454 | nr_init_timers(sk); |
| 455 | |
Ralf Baechle | 4d8937d | 2006-05-03 23:27:47 -0700 | [diff] [blame] | 456 | nr->t1 = |
| 457 | msecs_to_jiffies(sysctl_netrom_transport_timeout); |
| 458 | nr->t2 = |
| 459 | msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay); |
| 460 | nr->n2 = |
| 461 | msecs_to_jiffies(sysctl_netrom_transport_maximum_tries); |
| 462 | nr->t4 = |
| 463 | msecs_to_jiffies(sysctl_netrom_transport_busy_delay); |
| 464 | nr->idle = |
| 465 | msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | nr->window = sysctl_netrom_transport_requested_window_size; |
| 467 | |
| 468 | nr->bpqext = 1; |
| 469 | nr->state = NR_STATE_0; |
| 470 | |
| 471 | return 0; |
| 472 | } |
| 473 | |
| 474 | static struct sock *nr_make_new(struct sock *osk) |
| 475 | { |
| 476 | struct sock *sk; |
| 477 | struct nr_sock *nr, *onr; |
| 478 | |
| 479 | if (osk->sk_type != SOCK_SEQPACKET) |
| 480 | return NULL; |
| 481 | |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 482 | sk = sk_alloc(sock_net(osk), PF_NETROM, GFP_ATOMIC, osk->sk_prot); |
Pavel Emelyanov | 6257ff2 | 2007-11-01 00:39:31 -0700 | [diff] [blame] | 483 | if (sk == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | return NULL; |
| 485 | |
| 486 | nr = nr_sk(sk); |
| 487 | |
| 488 | sock_init_data(NULL, sk); |
| 489 | |
| 490 | sk->sk_type = osk->sk_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | sk->sk_priority = osk->sk_priority; |
| 492 | sk->sk_protocol = osk->sk_protocol; |
| 493 | sk->sk_rcvbuf = osk->sk_rcvbuf; |
| 494 | sk->sk_sndbuf = osk->sk_sndbuf; |
| 495 | sk->sk_state = TCP_ESTABLISHED; |
Ralf Baechle | 53b924b | 2005-08-23 10:11:30 -0700 | [diff] [blame] | 496 | sock_copy_flags(sk, osk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | |
| 498 | skb_queue_head_init(&nr->ack_queue); |
| 499 | skb_queue_head_init(&nr->reseq_queue); |
| 500 | skb_queue_head_init(&nr->frag_queue); |
| 501 | |
| 502 | nr_init_timers(sk); |
| 503 | |
| 504 | onr = nr_sk(osk); |
| 505 | |
| 506 | nr->t1 = onr->t1; |
| 507 | nr->t2 = onr->t2; |
| 508 | nr->n2 = onr->n2; |
| 509 | nr->t4 = onr->t4; |
| 510 | nr->idle = onr->idle; |
| 511 | nr->window = onr->window; |
| 512 | |
| 513 | nr->device = onr->device; |
| 514 | nr->bpqext = onr->bpqext; |
| 515 | |
| 516 | return sk; |
| 517 | } |
| 518 | |
| 519 | static int nr_release(struct socket *sock) |
| 520 | { |
| 521 | struct sock *sk = sock->sk; |
| 522 | struct nr_sock *nr; |
| 523 | |
| 524 | if (sk == NULL) return 0; |
| 525 | |
| 526 | sock_hold(sk); |
Jarek Poplawski | 859f4c7 | 2008-10-06 12:54:57 -0700 | [diff] [blame] | 527 | sock_orphan(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | lock_sock(sk); |
| 529 | nr = nr_sk(sk); |
| 530 | |
| 531 | switch (nr->state) { |
| 532 | case NR_STATE_0: |
| 533 | case NR_STATE_1: |
| 534 | case NR_STATE_2: |
| 535 | nr_disconnect(sk, 0); |
| 536 | nr_destroy_socket(sk); |
| 537 | break; |
| 538 | |
| 539 | case NR_STATE_3: |
| 540 | nr_clear_queues(sk); |
| 541 | nr->n2count = 0; |
| 542 | nr_write_internal(sk, NR_DISCREQ); |
| 543 | nr_start_t1timer(sk); |
| 544 | nr_stop_t2timer(sk); |
| 545 | nr_stop_t4timer(sk); |
| 546 | nr_stop_idletimer(sk); |
| 547 | nr->state = NR_STATE_2; |
| 548 | sk->sk_state = TCP_CLOSE; |
| 549 | sk->sk_shutdown |= SEND_SHUTDOWN; |
| 550 | sk->sk_state_change(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | sock_set_flag(sk, SOCK_DESTROY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | break; |
| 553 | |
| 554 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | break; |
| 556 | } |
| 557 | |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 558 | sock->sk = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | release_sock(sk); |
| 560 | sock_put(sk); |
| 561 | |
| 562 | return 0; |
| 563 | } |
| 564 | |
| 565 | static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
| 566 | { |
| 567 | struct sock *sk = sock->sk; |
| 568 | struct nr_sock *nr = nr_sk(sk); |
| 569 | struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr; |
| 570 | struct net_device *dev; |
Ralf Baechle | 01d7dd0 | 2005-08-23 10:11:45 -0700 | [diff] [blame] | 571 | ax25_uid_assoc *user; |
| 572 | ax25_address *source; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | |
| 574 | lock_sock(sk); |
| 575 | if (!sock_flag(sk, SOCK_ZAPPED)) { |
| 576 | release_sock(sk); |
| 577 | return -EINVAL; |
| 578 | } |
| 579 | if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) { |
| 580 | release_sock(sk); |
| 581 | return -EINVAL; |
| 582 | } |
| 583 | if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) { |
| 584 | release_sock(sk); |
| 585 | return -EINVAL; |
| 586 | } |
| 587 | if (addr->fsa_ax25.sax25_family != AF_NETROM) { |
| 588 | release_sock(sk); |
| 589 | return -EINVAL; |
| 590 | } |
| 591 | if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) { |
| 592 | SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n"); |
| 593 | release_sock(sk); |
| 594 | return -EADDRNOTAVAIL; |
| 595 | } |
| 596 | |
| 597 | /* |
| 598 | * Only the super user can set an arbitrary user callsign. |
| 599 | */ |
| 600 | if (addr->fsa_ax25.sax25_ndigis == 1) { |
| 601 | if (!capable(CAP_NET_BIND_SERVICE)) { |
| 602 | dev_put(dev); |
| 603 | release_sock(sk); |
| 604 | return -EACCES; |
| 605 | } |
| 606 | nr->user_addr = addr->fsa_digipeater[0]; |
| 607 | nr->source_addr = addr->fsa_ax25.sax25_call; |
| 608 | } else { |
| 609 | source = &addr->fsa_ax25.sax25_call; |
| 610 | |
David Howells | ba95b23 | 2008-11-14 10:39:08 +1100 | [diff] [blame] | 611 | user = ax25_findbyuid(current_euid()); |
Ralf Baechle | 01d7dd0 | 2005-08-23 10:11:45 -0700 | [diff] [blame] | 612 | if (user) { |
| 613 | nr->user_addr = user->call; |
| 614 | ax25_uid_put(user); |
| 615 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) { |
| 617 | release_sock(sk); |
| 618 | dev_put(dev); |
| 619 | return -EPERM; |
| 620 | } |
Ralf Baechle | 01d7dd0 | 2005-08-23 10:11:45 -0700 | [diff] [blame] | 621 | nr->user_addr = *source; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | } |
| 623 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | nr->source_addr = *source; |
| 625 | } |
| 626 | |
| 627 | nr->device = dev; |
| 628 | nr_insert_socket(sk); |
| 629 | |
| 630 | sock_reset_flag(sk, SOCK_ZAPPED); |
| 631 | dev_put(dev); |
| 632 | release_sock(sk); |
| 633 | SOCK_DEBUG(sk, "NET/ROM: socket is bound\n"); |
| 634 | return 0; |
| 635 | } |
| 636 | |
| 637 | static int nr_connect(struct socket *sock, struct sockaddr *uaddr, |
| 638 | int addr_len, int flags) |
| 639 | { |
| 640 | struct sock *sk = sock->sk; |
| 641 | struct nr_sock *nr = nr_sk(sk); |
| 642 | struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr; |
Ralf Baechle | 01d7dd0 | 2005-08-23 10:11:45 -0700 | [diff] [blame] | 643 | ax25_address *source = NULL; |
| 644 | ax25_uid_assoc *user; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | struct net_device *dev; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 646 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | |
| 648 | lock_sock(sk); |
| 649 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { |
| 650 | sock->state = SS_CONNECTED; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 651 | goto out_release; /* Connect completed during a ERESTARTSYS event */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | } |
| 653 | |
| 654 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { |
| 655 | sock->state = SS_UNCONNECTED; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 656 | err = -ECONNREFUSED; |
| 657 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | } |
| 659 | |
| 660 | if (sk->sk_state == TCP_ESTABLISHED) { |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 661 | err = -EISCONN; /* No reconnect on a seqpacket socket */ |
| 662 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | } |
| 664 | |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 665 | sk->sk_state = TCP_CLOSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | sock->state = SS_UNCONNECTED; |
| 667 | |
| 668 | if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) { |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 669 | err = -EINVAL; |
| 670 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | } |
| 672 | if (addr->sax25_family != AF_NETROM) { |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 673 | err = -EINVAL; |
| 674 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | } |
| 676 | if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ |
| 677 | sock_reset_flag(sk, SOCK_ZAPPED); |
| 678 | |
| 679 | if ((dev = nr_dev_first()) == NULL) { |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 680 | err = -ENETUNREACH; |
| 681 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | } |
| 683 | source = (ax25_address *)dev->dev_addr; |
| 684 | |
David Howells | ba95b23 | 2008-11-14 10:39:08 +1100 | [diff] [blame] | 685 | user = ax25_findbyuid(current_euid()); |
Ralf Baechle | 01d7dd0 | 2005-08-23 10:11:45 -0700 | [diff] [blame] | 686 | if (user) { |
| 687 | nr->user_addr = user->call; |
| 688 | ax25_uid_put(user); |
| 689 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) { |
| 691 | dev_put(dev); |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 692 | err = -EPERM; |
| 693 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | } |
Ralf Baechle | 01d7dd0 | 2005-08-23 10:11:45 -0700 | [diff] [blame] | 695 | nr->user_addr = *source; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | } |
| 697 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | nr->source_addr = *source; |
| 699 | nr->device = dev; |
| 700 | |
| 701 | dev_put(dev); |
| 702 | nr_insert_socket(sk); /* Finish the bind */ |
| 703 | } |
| 704 | |
| 705 | nr->dest_addr = addr->sax25_call; |
| 706 | |
| 707 | release_sock(sk); |
| 708 | circuit = nr_find_next_circuit(); |
| 709 | lock_sock(sk); |
| 710 | |
| 711 | nr->my_index = circuit / 256; |
| 712 | nr->my_id = circuit % 256; |
| 713 | |
| 714 | circuit++; |
| 715 | |
| 716 | /* Move to connecting socket, start sending Connect Requests */ |
| 717 | sock->state = SS_CONNECTING; |
| 718 | sk->sk_state = TCP_SYN_SENT; |
| 719 | |
| 720 | nr_establish_data_link(sk); |
| 721 | |
| 722 | nr->state = NR_STATE_1; |
| 723 | |
| 724 | nr_start_heartbeat(sk); |
| 725 | |
| 726 | /* Now the loop */ |
| 727 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 728 | err = -EINPROGRESS; |
| 729 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | } |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 731 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | /* |
| 733 | * A Connect Ack with Choke or timeout or failed routing will go to |
| 734 | * closed. |
| 735 | */ |
| 736 | if (sk->sk_state == TCP_SYN_SENT) { |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 737 | DEFINE_WAIT(wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | for (;;) { |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 740 | prepare_to_wait(sk->sk_sleep, &wait, |
YOSHIFUJI Hideaki | 639fc4c | 2007-07-19 10:44:32 +0900 | [diff] [blame] | 741 | TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | if (sk->sk_state != TCP_SYN_SENT) |
| 743 | break; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 744 | if (!signal_pending(current)) { |
| 745 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | schedule(); |
| 747 | lock_sock(sk); |
| 748 | continue; |
| 749 | } |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 750 | err = -ERESTARTSYS; |
| 751 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | } |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 753 | finish_wait(sk->sk_sleep, &wait); |
| 754 | if (err) |
| 755 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | } |
| 757 | |
| 758 | if (sk->sk_state != TCP_ESTABLISHED) { |
| 759 | sock->state = SS_UNCONNECTED; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 760 | err = sock_error(sk); /* Always set at this point */ |
| 761 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | } |
| 763 | |
| 764 | sock->state = SS_CONNECTED; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 765 | |
| 766 | out_release: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | release_sock(sk); |
| 768 | |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 769 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | } |
| 771 | |
| 772 | static int nr_accept(struct socket *sock, struct socket *newsock, int flags) |
| 773 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | struct sk_buff *skb; |
| 775 | struct sock *newsk; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 776 | DEFINE_WAIT(wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | struct sock *sk; |
| 778 | int err = 0; |
| 779 | |
| 780 | if ((sk = sock->sk) == NULL) |
| 781 | return -EINVAL; |
| 782 | |
| 783 | lock_sock(sk); |
| 784 | if (sk->sk_type != SOCK_SEQPACKET) { |
| 785 | err = -EOPNOTSUPP; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 786 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | } |
| 788 | |
| 789 | if (sk->sk_state != TCP_LISTEN) { |
| 790 | err = -EINVAL; |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 791 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | } |
| 793 | |
| 794 | /* |
| 795 | * The write queue this time is holding sockets ready to use |
| 796 | * hooked into the SABM we saved |
| 797 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | for (;;) { |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 799 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | skb = skb_dequeue(&sk->sk_receive_queue); |
| 801 | if (skb) |
| 802 | break; |
| 803 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | if (flags & O_NONBLOCK) { |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 805 | err = -EWOULDBLOCK; |
| 806 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | } |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 808 | if (!signal_pending(current)) { |
| 809 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | schedule(); |
| 811 | lock_sock(sk); |
| 812 | continue; |
| 813 | } |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 814 | err = -ERESTARTSYS; |
| 815 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | } |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 817 | finish_wait(sk->sk_sleep, &wait); |
| 818 | if (err) |
| 819 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | |
| 821 | newsk = skb->sk; |
David S. Miller | 7b66767 | 2008-06-17 02:36:44 -0700 | [diff] [blame] | 822 | sock_graft(newsk, newsock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | |
| 824 | /* Now attach up the new socket */ |
| 825 | kfree_skb(skb); |
Ralf Baechle DL5RB | 18601a7 | 2006-07-03 19:31:14 -0700 | [diff] [blame] | 826 | sk_acceptq_removed(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 828 | out_release: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | release_sock(sk); |
Ralf Baechle | 75606dc | 2007-04-20 16:06:45 -0700 | [diff] [blame] | 830 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | return err; |
| 832 | } |
| 833 | |
| 834 | static int nr_getname(struct socket *sock, struct sockaddr *uaddr, |
| 835 | int *uaddr_len, int peer) |
| 836 | { |
| 837 | struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr; |
| 838 | struct sock *sk = sock->sk; |
| 839 | struct nr_sock *nr = nr_sk(sk); |
| 840 | |
| 841 | lock_sock(sk); |
| 842 | if (peer != 0) { |
| 843 | if (sk->sk_state != TCP_ESTABLISHED) { |
| 844 | release_sock(sk); |
| 845 | return -ENOTCONN; |
| 846 | } |
| 847 | sax->fsa_ax25.sax25_family = AF_NETROM; |
| 848 | sax->fsa_ax25.sax25_ndigis = 1; |
| 849 | sax->fsa_ax25.sax25_call = nr->user_addr; |
| 850 | sax->fsa_digipeater[0] = nr->dest_addr; |
| 851 | *uaddr_len = sizeof(struct full_sockaddr_ax25); |
| 852 | } else { |
| 853 | sax->fsa_ax25.sax25_family = AF_NETROM; |
| 854 | sax->fsa_ax25.sax25_ndigis = 0; |
| 855 | sax->fsa_ax25.sax25_call = nr->source_addr; |
| 856 | *uaddr_len = sizeof(struct sockaddr_ax25); |
| 857 | } |
| 858 | release_sock(sk); |
| 859 | |
| 860 | return 0; |
| 861 | } |
| 862 | |
| 863 | int nr_rx_frame(struct sk_buff *skb, struct net_device *dev) |
| 864 | { |
| 865 | struct sock *sk; |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 866 | struct sock *make; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | struct nr_sock *nr_make; |
| 868 | ax25_address *src, *dest, *user; |
| 869 | unsigned short circuit_index, circuit_id; |
| 870 | unsigned short peer_circuit_index, peer_circuit_id; |
| 871 | unsigned short frametype, flags, window, timeout; |
| 872 | int ret; |
| 873 | |
| 874 | skb->sk = NULL; /* Initially we don't know who it's for */ |
| 875 | |
| 876 | /* |
| 877 | * skb->data points to the netrom frame start |
| 878 | */ |
| 879 | |
| 880 | src = (ax25_address *)(skb->data + 0); |
| 881 | dest = (ax25_address *)(skb->data + 7); |
| 882 | |
| 883 | circuit_index = skb->data[15]; |
| 884 | circuit_id = skb->data[16]; |
| 885 | peer_circuit_index = skb->data[17]; |
| 886 | peer_circuit_id = skb->data[18]; |
| 887 | frametype = skb->data[19] & 0x0F; |
| 888 | flags = skb->data[19] & 0xF0; |
| 889 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | /* |
| 891 | * Check for an incoming IP over NET/ROM frame. |
| 892 | */ |
Ralf Baechle | 98a82fe | 2005-08-24 11:35:51 -0700 | [diff] [blame] | 893 | if (frametype == NR_PROTOEXT && |
| 894 | circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN); |
Arnaldo Carvalho de Melo | badff6d | 2007-03-13 13:06:52 -0300 | [diff] [blame] | 896 | skb_reset_transport_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | |
| 898 | return nr_rx_ip(skb, dev); |
| 899 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | |
| 901 | /* |
| 902 | * Find an existing socket connection, based on circuit ID, if it's |
| 903 | * a Connect Request base it on their circuit ID. |
| 904 | * |
| 905 | * Circuit ID 0/0 is not valid but it could still be a "reset" for a |
| 906 | * circuit that no longer exists at the other end ... |
| 907 | */ |
| 908 | |
| 909 | sk = NULL; |
| 910 | |
| 911 | if (circuit_index == 0 && circuit_id == 0) { |
| 912 | if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG) |
| 913 | sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src); |
| 914 | } else { |
| 915 | if (frametype == NR_CONNREQ) |
| 916 | sk = nr_find_peer(circuit_index, circuit_id, src); |
| 917 | else |
| 918 | sk = nr_find_socket(circuit_index, circuit_id); |
| 919 | } |
| 920 | |
| 921 | if (sk != NULL) { |
Arnaldo Carvalho de Melo | badff6d | 2007-03-13 13:06:52 -0300 | [diff] [blame] | 922 | skb_reset_transport_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | |
| 924 | if (frametype == NR_CONNACK && skb->len == 22) |
| 925 | nr_sk(sk)->bpqext = 1; |
| 926 | else |
| 927 | nr_sk(sk)->bpqext = 0; |
| 928 | |
| 929 | ret = nr_process_rx_frame(sk, skb); |
| 930 | bh_unlock_sock(sk); |
| 931 | return ret; |
| 932 | } |
| 933 | |
| 934 | /* |
| 935 | * Now it should be a CONNREQ. |
| 936 | */ |
| 937 | if (frametype != NR_CONNREQ) { |
| 938 | /* |
| 939 | * Here it would be nice to be able to send a reset but |
Ralf Baechle | e21ce8c | 2005-09-12 14:27:37 -0700 | [diff] [blame] | 940 | * NET/ROM doesn't have one. We've tried to extend the protocol |
| 941 | * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that |
| 942 | * apparently kills BPQ boxes... :-( |
| 943 | * So now we try to follow the established behaviour of |
| 944 | * G8PZT's Xrouter which is sending packets with command type 7 |
| 945 | * as an extension of the protocol. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | */ |
Ralf Baechle | e21ce8c | 2005-09-12 14:27:37 -0700 | [diff] [blame] | 947 | if (sysctl_netrom_reset_circuit && |
| 948 | (frametype != NR_RESET || flags != 0)) |
| 949 | nr_transmit_reset(skb, 1); |
| 950 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | return 0; |
| 952 | } |
| 953 | |
| 954 | sk = nr_find_listener(dest); |
| 955 | |
| 956 | user = (ax25_address *)(skb->data + 21); |
| 957 | |
| 958 | if (sk == NULL || sk_acceptq_is_full(sk) || |
| 959 | (make = nr_make_new(sk)) == NULL) { |
| 960 | nr_transmit_refusal(skb, 0); |
| 961 | if (sk) |
| 962 | bh_unlock_sock(sk); |
| 963 | return 0; |
| 964 | } |
| 965 | |
| 966 | window = skb->data[20]; |
| 967 | |
| 968 | skb->sk = make; |
| 969 | make->sk_state = TCP_ESTABLISHED; |
| 970 | |
| 971 | /* Fill in his circuit details */ |
| 972 | nr_make = nr_sk(make); |
| 973 | nr_make->source_addr = *dest; |
| 974 | nr_make->dest_addr = *src; |
| 975 | nr_make->user_addr = *user; |
| 976 | |
| 977 | nr_make->your_index = circuit_index; |
| 978 | nr_make->your_id = circuit_id; |
| 979 | |
| 980 | bh_unlock_sock(sk); |
| 981 | circuit = nr_find_next_circuit(); |
| 982 | bh_lock_sock(sk); |
| 983 | |
| 984 | nr_make->my_index = circuit / 256; |
| 985 | nr_make->my_id = circuit % 256; |
| 986 | |
| 987 | circuit++; |
| 988 | |
| 989 | /* Window negotiation */ |
| 990 | if (window < nr_make->window) |
| 991 | nr_make->window = window; |
| 992 | |
| 993 | /* L4 timeout negotiation */ |
| 994 | if (skb->len == 37) { |
| 995 | timeout = skb->data[36] * 256 + skb->data[35]; |
| 996 | if (timeout * HZ < nr_make->t1) |
| 997 | nr_make->t1 = timeout * HZ; |
| 998 | nr_make->bpqext = 1; |
| 999 | } else { |
| 1000 | nr_make->bpqext = 0; |
| 1001 | } |
| 1002 | |
| 1003 | nr_write_internal(make, NR_CONNACK); |
| 1004 | |
| 1005 | nr_make->condition = 0x00; |
| 1006 | nr_make->vs = 0; |
| 1007 | nr_make->va = 0; |
| 1008 | nr_make->vr = 0; |
| 1009 | nr_make->vl = 0; |
| 1010 | nr_make->state = NR_STATE_3; |
Ralf Baechle DL5RB | 18601a7 | 2006-07-03 19:31:14 -0700 | [diff] [blame] | 1011 | sk_acceptq_added(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | skb_queue_head(&sk->sk_receive_queue, skb); |
| 1013 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | if (!sock_flag(sk, SOCK_DEAD)) |
| 1015 | sk->sk_data_ready(sk, skb->len); |
| 1016 | |
| 1017 | bh_unlock_sock(sk); |
Ralf Baechle | 5cc29e3 | 2006-07-10 16:23:21 -0700 | [diff] [blame] | 1018 | |
| 1019 | nr_insert_socket(make); |
| 1020 | |
| 1021 | nr_start_heartbeat(make); |
| 1022 | nr_start_idletimer(make); |
| 1023 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | return 1; |
| 1025 | } |
| 1026 | |
| 1027 | static int nr_sendmsg(struct kiocb *iocb, struct socket *sock, |
| 1028 | struct msghdr *msg, size_t len) |
| 1029 | { |
| 1030 | struct sock *sk = sock->sk; |
| 1031 | struct nr_sock *nr = nr_sk(sk); |
| 1032 | struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name; |
| 1033 | int err; |
| 1034 | struct sockaddr_ax25 sax; |
| 1035 | struct sk_buff *skb; |
| 1036 | unsigned char *asmptr; |
| 1037 | int size; |
| 1038 | |
| 1039 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) |
| 1040 | return -EINVAL; |
| 1041 | |
| 1042 | lock_sock(sk); |
| 1043 | if (sock_flag(sk, SOCK_ZAPPED)) { |
| 1044 | err = -EADDRNOTAVAIL; |
| 1045 | goto out; |
| 1046 | } |
| 1047 | |
| 1048 | if (sk->sk_shutdown & SEND_SHUTDOWN) { |
| 1049 | send_sig(SIGPIPE, current, 0); |
| 1050 | err = -EPIPE; |
| 1051 | goto out; |
| 1052 | } |
| 1053 | |
| 1054 | if (nr->device == NULL) { |
| 1055 | err = -ENETUNREACH; |
| 1056 | goto out; |
| 1057 | } |
| 1058 | |
| 1059 | if (usax) { |
| 1060 | if (msg->msg_namelen < sizeof(sax)) { |
| 1061 | err = -EINVAL; |
| 1062 | goto out; |
| 1063 | } |
| 1064 | sax = *usax; |
| 1065 | if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) { |
| 1066 | err = -EISCONN; |
| 1067 | goto out; |
| 1068 | } |
| 1069 | if (sax.sax25_family != AF_NETROM) { |
| 1070 | err = -EINVAL; |
| 1071 | goto out; |
| 1072 | } |
| 1073 | } else { |
| 1074 | if (sk->sk_state != TCP_ESTABLISHED) { |
| 1075 | err = -ENOTCONN; |
| 1076 | goto out; |
| 1077 | } |
| 1078 | sax.sax25_family = AF_NETROM; |
| 1079 | sax.sax25_call = nr->dest_addr; |
| 1080 | } |
| 1081 | |
| 1082 | SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n"); |
| 1083 | |
Alan Cox | 83e0bbc | 2009-03-27 00:28:21 -0700 | [diff] [blame] | 1084 | /* Build a packet - the conventional user limit is 236 bytes. We can |
| 1085 | do ludicrously large NetROM frames but must not overflow */ |
Jean Delvare | cc29c70 | 2009-04-22 00:49:51 -0700 | [diff] [blame] | 1086 | if (len > 65536) { |
| 1087 | err = -EMSGSIZE; |
| 1088 | goto out; |
| 1089 | } |
Alan Cox | 83e0bbc | 2009-03-27 00:28:21 -0700 | [diff] [blame] | 1090 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n"); |
| 1092 | size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN; |
| 1093 | |
| 1094 | if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) |
| 1095 | goto out; |
| 1096 | |
| 1097 | skb_reserve(skb, size - len); |
Arnaldo Carvalho de Melo | eeeb037 | 2007-03-14 21:04:34 -0300 | [diff] [blame] | 1098 | skb_reset_transport_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | |
| 1100 | /* |
| 1101 | * Push down the NET/ROM header |
| 1102 | */ |
| 1103 | |
| 1104 | asmptr = skb_push(skb, NR_TRANSPORT_LEN); |
| 1105 | SOCK_DEBUG(sk, "Building NET/ROM Header.\n"); |
| 1106 | |
| 1107 | /* Build a NET/ROM Transport header */ |
| 1108 | |
| 1109 | *asmptr++ = nr->your_index; |
| 1110 | *asmptr++ = nr->your_id; |
| 1111 | *asmptr++ = 0; /* To be filled in later */ |
| 1112 | *asmptr++ = 0; /* Ditto */ |
| 1113 | *asmptr++ = NR_INFO; |
| 1114 | SOCK_DEBUG(sk, "Built header.\n"); |
| 1115 | |
| 1116 | /* |
| 1117 | * Put the data on the end |
| 1118 | */ |
Arnaldo Carvalho de Melo | eeeb037 | 2007-03-14 21:04:34 -0300 | [diff] [blame] | 1119 | skb_put(skb, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | SOCK_DEBUG(sk, "NET/ROM: Appending user data\n"); |
| 1122 | |
| 1123 | /* User data follows immediately after the NET/ROM transport header */ |
Arnaldo Carvalho de Melo | eeeb037 | 2007-03-14 21:04:34 -0300 | [diff] [blame] | 1124 | if (memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | kfree_skb(skb); |
| 1126 | err = -EFAULT; |
| 1127 | goto out; |
| 1128 | } |
| 1129 | |
| 1130 | SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n"); |
| 1131 | |
| 1132 | if (sk->sk_state != TCP_ESTABLISHED) { |
| 1133 | kfree_skb(skb); |
| 1134 | err = -ENOTCONN; |
| 1135 | goto out; |
| 1136 | } |
| 1137 | |
| 1138 | nr_output(sk, skb); /* Shove it onto the queue */ |
| 1139 | |
| 1140 | err = len; |
| 1141 | out: |
| 1142 | release_sock(sk); |
| 1143 | return err; |
| 1144 | } |
| 1145 | |
| 1146 | static int nr_recvmsg(struct kiocb *iocb, struct socket *sock, |
| 1147 | struct msghdr *msg, size_t size, int flags) |
| 1148 | { |
| 1149 | struct sock *sk = sock->sk; |
| 1150 | struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name; |
| 1151 | size_t copied; |
| 1152 | struct sk_buff *skb; |
| 1153 | int er; |
| 1154 | |
| 1155 | /* |
| 1156 | * This works for seqpacket too. The receiver has ordered the queue for |
| 1157 | * us! We do one quick check first though |
| 1158 | */ |
| 1159 | |
| 1160 | lock_sock(sk); |
| 1161 | if (sk->sk_state != TCP_ESTABLISHED) { |
| 1162 | release_sock(sk); |
| 1163 | return -ENOTCONN; |
| 1164 | } |
| 1165 | |
| 1166 | /* Now we can treat all alike */ |
| 1167 | if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) { |
| 1168 | release_sock(sk); |
| 1169 | return er; |
| 1170 | } |
| 1171 | |
Arnaldo Carvalho de Melo | badff6d | 2007-03-13 13:06:52 -0300 | [diff] [blame] | 1172 | skb_reset_transport_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | copied = skb->len; |
| 1174 | |
| 1175 | if (copied > size) { |
| 1176 | copied = size; |
| 1177 | msg->msg_flags |= MSG_TRUNC; |
| 1178 | } |
| 1179 | |
| 1180 | skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
| 1181 | |
| 1182 | if (sax != NULL) { |
| 1183 | sax->sax25_family = AF_NETROM; |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 1184 | skb_copy_from_linear_data_offset(skb, 7, sax->sax25_call.ax25_call, |
| 1185 | AX25_ADDR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | } |
| 1187 | |
| 1188 | msg->msg_namelen = sizeof(*sax); |
| 1189 | |
David S. Miller | 80e20f6 | 2009-03-27 17:22:55 -0700 | [diff] [blame] | 1190 | skb_free_datagram(sk, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | |
| 1192 | release_sock(sk); |
| 1193 | return copied; |
| 1194 | } |
| 1195 | |
| 1196 | |
| 1197 | static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| 1198 | { |
| 1199 | struct sock *sk = sock->sk; |
| 1200 | void __user *argp = (void __user *)arg; |
| 1201 | int ret; |
| 1202 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | switch (cmd) { |
| 1204 | case TIOCOUTQ: { |
| 1205 | long amount; |
Christoph Hellwig | 5ff7630 | 2006-01-03 14:14:46 -0800 | [diff] [blame] | 1206 | |
| 1207 | lock_sock(sk); |
Eric Dumazet | 31e6d36 | 2009-06-17 19:05:41 -0700 | [diff] [blame] | 1208 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | if (amount < 0) |
| 1210 | amount = 0; |
| 1211 | release_sock(sk); |
| 1212 | return put_user(amount, (int __user *)argp); |
| 1213 | } |
| 1214 | |
| 1215 | case TIOCINQ: { |
| 1216 | struct sk_buff *skb; |
| 1217 | long amount = 0L; |
Christoph Hellwig | 5ff7630 | 2006-01-03 14:14:46 -0800 | [diff] [blame] | 1218 | |
| 1219 | lock_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | /* These two are safe on a single CPU system as only user tasks fiddle here */ |
| 1221 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) |
| 1222 | amount = skb->len; |
| 1223 | release_sock(sk); |
| 1224 | return put_user(amount, (int __user *)argp); |
| 1225 | } |
| 1226 | |
| 1227 | case SIOCGSTAMP: |
Christoph Hellwig | 5ff7630 | 2006-01-03 14:14:46 -0800 | [diff] [blame] | 1228 | lock_sock(sk); |
Ralf Baechle | 9b37ee7 | 2005-09-12 14:23:52 -0700 | [diff] [blame] | 1229 | ret = sock_get_timestamp(sk, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | release_sock(sk); |
| 1231 | return ret; |
| 1232 | |
Eric Dumazet | ae40eb1 | 2007-03-18 17:33:16 -0700 | [diff] [blame] | 1233 | case SIOCGSTAMPNS: |
| 1234 | lock_sock(sk); |
| 1235 | ret = sock_get_timestampns(sk, argp); |
| 1236 | release_sock(sk); |
| 1237 | return ret; |
| 1238 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | case SIOCGIFADDR: |
| 1240 | case SIOCSIFADDR: |
| 1241 | case SIOCGIFDSTADDR: |
| 1242 | case SIOCSIFDSTADDR: |
| 1243 | case SIOCGIFBRDADDR: |
| 1244 | case SIOCSIFBRDADDR: |
| 1245 | case SIOCGIFNETMASK: |
| 1246 | case SIOCSIFNETMASK: |
| 1247 | case SIOCGIFMETRIC: |
| 1248 | case SIOCSIFMETRIC: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | return -EINVAL; |
| 1250 | |
| 1251 | case SIOCADDRT: |
| 1252 | case SIOCDELRT: |
| 1253 | case SIOCNRDECOBS: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | if (!capable(CAP_NET_ADMIN)) return -EPERM; |
| 1255 | return nr_rt_ioctl(cmd, argp); |
| 1256 | |
| 1257 | default: |
Christoph Hellwig | b5e5fa5 | 2006-01-03 14:18:33 -0800 | [diff] [blame] | 1258 | return -ENOIOCTLCMD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | |
| 1261 | return 0; |
| 1262 | } |
| 1263 | |
| 1264 | #ifdef CONFIG_PROC_FS |
| 1265 | |
| 1266 | static void *nr_info_start(struct seq_file *seq, loff_t *pos) |
| 1267 | { |
| 1268 | struct sock *s; |
| 1269 | struct hlist_node *node; |
| 1270 | int i = 1; |
| 1271 | |
| 1272 | spin_lock_bh(&nr_list_lock); |
| 1273 | if (*pos == 0) |
| 1274 | return SEQ_START_TOKEN; |
| 1275 | |
| 1276 | sk_for_each(s, node, &nr_list) { |
| 1277 | if (i == *pos) |
| 1278 | return s; |
| 1279 | ++i; |
| 1280 | } |
| 1281 | return NULL; |
| 1282 | } |
| 1283 | |
| 1284 | static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos) |
| 1285 | { |
| 1286 | ++*pos; |
| 1287 | |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 1288 | return (v == SEQ_START_TOKEN) ? sk_head(&nr_list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | : sk_next((struct sock *)v); |
| 1290 | } |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 1291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | static void nr_info_stop(struct seq_file *seq, void *v) |
| 1293 | { |
| 1294 | spin_unlock_bh(&nr_list_lock); |
| 1295 | } |
| 1296 | |
| 1297 | static int nr_info_show(struct seq_file *seq, void *v) |
| 1298 | { |
| 1299 | struct sock *s = v; |
| 1300 | struct net_device *dev; |
| 1301 | struct nr_sock *nr; |
| 1302 | const char *devname; |
Ralf Baechle | f75268c | 2005-09-06 15:49:39 -0700 | [diff] [blame] | 1303 | char buf[11]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | |
| 1305 | if (v == SEQ_START_TOKEN) |
| 1306 | seq_puts(seq, |
| 1307 | "user_addr dest_node src_node dev my your st vs vr va t1 t2 t4 idle n2 wnd Snd-Q Rcv-Q inode\n"); |
| 1308 | |
| 1309 | else { |
| 1310 | |
| 1311 | bh_lock_sock(s); |
| 1312 | nr = nr_sk(s); |
| 1313 | |
| 1314 | if ((dev = nr->device) == NULL) |
| 1315 | devname = "???"; |
| 1316 | else |
| 1317 | devname = dev->name; |
| 1318 | |
Ralf Baechle | f75268c | 2005-09-06 15:49:39 -0700 | [diff] [blame] | 1319 | seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr)); |
| 1320 | seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr)); |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 1321 | seq_printf(seq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | "%-9s %-3s %02X/%02X %02X/%02X %2d %3d %3d %3d %3lu/%03lu %2lu/%02lu %3lu/%03lu %3lu/%03lu %2d/%02d %3d %5d %5d %ld\n", |
Ralf Baechle | f75268c | 2005-09-06 15:49:39 -0700 | [diff] [blame] | 1323 | ax2asc(buf, &nr->source_addr), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | devname, |
| 1325 | nr->my_index, |
| 1326 | nr->my_id, |
| 1327 | nr->your_index, |
| 1328 | nr->your_id, |
| 1329 | nr->state, |
| 1330 | nr->vs, |
| 1331 | nr->vr, |
| 1332 | nr->va, |
| 1333 | ax25_display_timer(&nr->t1timer) / HZ, |
| 1334 | nr->t1 / HZ, |
| 1335 | ax25_display_timer(&nr->t2timer) / HZ, |
| 1336 | nr->t2 / HZ, |
| 1337 | ax25_display_timer(&nr->t4timer) / HZ, |
| 1338 | nr->t4 / HZ, |
| 1339 | ax25_display_timer(&nr->idletimer) / (60 * HZ), |
| 1340 | nr->idle / (60 * HZ), |
| 1341 | nr->n2count, |
| 1342 | nr->n2, |
| 1343 | nr->window, |
Eric Dumazet | 31e6d36 | 2009-06-17 19:05:41 -0700 | [diff] [blame] | 1344 | sk_wmem_alloc_get(s), |
| 1345 | sk_rmem_alloc_get(s), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); |
| 1347 | |
| 1348 | bh_unlock_sock(s); |
| 1349 | } |
| 1350 | return 0; |
| 1351 | } |
| 1352 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 1353 | static const struct seq_operations nr_info_seqops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | .start = nr_info_start, |
| 1355 | .next = nr_info_next, |
| 1356 | .stop = nr_info_stop, |
| 1357 | .show = nr_info_show, |
| 1358 | }; |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 1359 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | static int nr_info_open(struct inode *inode, struct file *file) |
| 1361 | { |
| 1362 | return seq_open(file, &nr_info_seqops); |
| 1363 | } |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 1364 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 1365 | static const struct file_operations nr_info_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | .owner = THIS_MODULE, |
| 1367 | .open = nr_info_open, |
| 1368 | .read = seq_read, |
| 1369 | .llseek = seq_lseek, |
| 1370 | .release = seq_release, |
| 1371 | }; |
| 1372 | #endif /* CONFIG_PROC_FS */ |
| 1373 | |
| 1374 | static struct net_proto_family nr_family_ops = { |
| 1375 | .family = PF_NETROM, |
| 1376 | .create = nr_create, |
| 1377 | .owner = THIS_MODULE, |
| 1378 | }; |
| 1379 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 1380 | static const struct proto_ops nr_proto_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | .family = PF_NETROM, |
| 1382 | .owner = THIS_MODULE, |
| 1383 | .release = nr_release, |
| 1384 | .bind = nr_bind, |
| 1385 | .connect = nr_connect, |
| 1386 | .socketpair = sock_no_socketpair, |
| 1387 | .accept = nr_accept, |
| 1388 | .getname = nr_getname, |
| 1389 | .poll = datagram_poll, |
| 1390 | .ioctl = nr_ioctl, |
| 1391 | .listen = nr_listen, |
| 1392 | .shutdown = sock_no_shutdown, |
| 1393 | .setsockopt = nr_setsockopt, |
| 1394 | .getsockopt = nr_getsockopt, |
| 1395 | .sendmsg = nr_sendmsg, |
| 1396 | .recvmsg = nr_recvmsg, |
| 1397 | .mmap = sock_no_mmap, |
| 1398 | .sendpage = sock_no_sendpage, |
| 1399 | }; |
| 1400 | |
| 1401 | static struct notifier_block nr_dev_notifier = { |
| 1402 | .notifier_call = nr_device_event, |
| 1403 | }; |
| 1404 | |
| 1405 | static struct net_device **dev_nr; |
| 1406 | |
Ralf Baechle | 8d5cf59 | 2006-12-14 15:50:01 -0800 | [diff] [blame] | 1407 | static struct ax25_protocol nr_pid = { |
| 1408 | .pid = AX25_P_NETROM, |
| 1409 | .func = nr_route_frame |
| 1410 | }; |
| 1411 | |
Ralf Baechle | a428271 | 2006-12-14 15:51:23 -0800 | [diff] [blame] | 1412 | static struct ax25_linkfail nr_linkfail_notifier = { |
| 1413 | .func = nr_link_failed, |
| 1414 | }; |
| 1415 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | static int __init nr_proto_init(void) |
| 1417 | { |
| 1418 | int i; |
| 1419 | int rc = proto_register(&nr_proto, 0); |
| 1420 | |
| 1421 | if (rc != 0) |
| 1422 | goto out; |
| 1423 | |
| 1424 | if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) { |
| 1425 | printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n"); |
| 1426 | return -1; |
| 1427 | } |
| 1428 | |
Ralf Baechle | 1b30dd3 | 2006-07-09 12:14:22 -0700 | [diff] [blame] | 1429 | dev_nr = kzalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | if (dev_nr == NULL) { |
| 1431 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n"); |
| 1432 | return -1; |
| 1433 | } |
| 1434 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | for (i = 0; i < nr_ndevs; i++) { |
| 1436 | char name[IFNAMSIZ]; |
| 1437 | struct net_device *dev; |
| 1438 | |
| 1439 | sprintf(name, "nr%d", i); |
Stephen Hemminger | b51414b | 2009-01-09 13:01:03 +0000 | [diff] [blame] | 1440 | dev = alloc_netdev(0, name, nr_setup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | if (!dev) { |
| 1442 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n"); |
| 1443 | goto fail; |
| 1444 | } |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 1445 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | dev->base_addr = i; |
| 1447 | if (register_netdev(dev)) { |
| 1448 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n"); |
| 1449 | free_netdev(dev); |
| 1450 | goto fail; |
| 1451 | } |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 1452 | nr_set_lockdep_key(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | dev_nr[i] = dev; |
| 1454 | } |
| 1455 | |
| 1456 | if (sock_register(&nr_family_ops)) { |
| 1457 | printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n"); |
| 1458 | goto fail; |
| 1459 | } |
YOSHIFUJI Hideaki | 5f8f59d | 2007-02-09 23:25:09 +0900 | [diff] [blame] | 1460 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1461 | register_netdevice_notifier(&nr_dev_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | |
Ralf Baechle | 8d5cf59 | 2006-12-14 15:50:01 -0800 | [diff] [blame] | 1463 | ax25_register_pid(&nr_pid); |
Ralf Baechle | a428271 | 2006-12-14 15:51:23 -0800 | [diff] [blame] | 1464 | ax25_linkfail_register(&nr_linkfail_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | |
| 1466 | #ifdef CONFIG_SYSCTL |
| 1467 | nr_register_sysctl(); |
| 1468 | #endif |
| 1469 | |
| 1470 | nr_loopback_init(); |
| 1471 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 1472 | proc_net_fops_create(&init_net, "nr", S_IRUGO, &nr_info_fops); |
| 1473 | proc_net_fops_create(&init_net, "nr_neigh", S_IRUGO, &nr_neigh_fops); |
| 1474 | proc_net_fops_create(&init_net, "nr_nodes", S_IRUGO, &nr_nodes_fops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1475 | out: |
| 1476 | return rc; |
| 1477 | fail: |
| 1478 | while (--i >= 0) { |
| 1479 | unregister_netdev(dev_nr[i]); |
| 1480 | free_netdev(dev_nr[i]); |
| 1481 | } |
| 1482 | kfree(dev_nr); |
| 1483 | proto_unregister(&nr_proto); |
| 1484 | rc = -1; |
| 1485 | goto out; |
| 1486 | } |
| 1487 | |
| 1488 | module_init(nr_proto_init); |
| 1489 | |
| 1490 | module_param(nr_ndevs, int, 0); |
| 1491 | MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices"); |
| 1492 | |
| 1493 | MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); |
| 1494 | MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol"); |
| 1495 | MODULE_LICENSE("GPL"); |
| 1496 | MODULE_ALIAS_NETPROTO(PF_NETROM); |
| 1497 | |
| 1498 | static void __exit nr_exit(void) |
| 1499 | { |
| 1500 | int i; |
| 1501 | |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 1502 | proc_net_remove(&init_net, "nr"); |
| 1503 | proc_net_remove(&init_net, "nr_neigh"); |
| 1504 | proc_net_remove(&init_net, "nr_nodes"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1505 | nr_loopback_clear(); |
| 1506 | |
| 1507 | nr_rt_free(); |
| 1508 | |
| 1509 | #ifdef CONFIG_SYSCTL |
| 1510 | nr_unregister_sysctl(); |
| 1511 | #endif |
| 1512 | |
Ralf Baechle | a428271 | 2006-12-14 15:51:23 -0800 | [diff] [blame] | 1513 | ax25_linkfail_release(&nr_linkfail_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | ax25_protocol_release(AX25_P_NETROM); |
| 1515 | |
| 1516 | unregister_netdevice_notifier(&nr_dev_notifier); |
| 1517 | |
| 1518 | sock_unregister(PF_NETROM); |
| 1519 | |
| 1520 | for (i = 0; i < nr_ndevs; i++) { |
| 1521 | struct net_device *dev = dev_nr[i]; |
| 1522 | if (dev) { |
| 1523 | unregister_netdev(dev); |
| 1524 | free_netdev(dev); |
| 1525 | } |
| 1526 | } |
| 1527 | |
| 1528 | kfree(dev_nr); |
| 1529 | proto_unregister(&nr_proto); |
| 1530 | } |
| 1531 | module_exit(nr_exit); |