Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /********************************************************************* |
| 2 | * |
| 3 | * Filename: af_irda.c |
| 4 | * Version: 0.9 |
| 5 | * Description: IrDA sockets implementation |
| 6 | * Status: Stable |
| 7 | * Author: Dag Brattli <dagb@cs.uit.no> |
| 8 | * Created at: Sun May 31 10:12:43 1998 |
| 9 | * Modified at: Sat Dec 25 21:10:23 1999 |
| 10 | * Modified by: Dag Brattli <dag@brattli.net> |
| 11 | * Sources: af_netroom.c, af_ax25.c, af_rose.c, af_x25.c etc. |
| 12 | * |
| 13 | * Copyright (c) 1999 Dag Brattli <dagb@cs.uit.no> |
| 14 | * Copyright (c) 1999-2003 Jean Tourrilhes <jt@hpl.hp.com> |
| 15 | * All Rights Reserved. |
| 16 | * |
| 17 | * This program is free software; you can redistribute it and/or |
| 18 | * modify it under the terms of the GNU General Public License as |
| 19 | * published by the Free Software Foundation; either version 2 of |
| 20 | * the License, or (at your option) any later version. |
| 21 | * |
| 22 | * This program is distributed in the hope that it will be useful, |
| 23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 25 | * GNU General Public License for more details. |
| 26 | * |
| 27 | * You should have received a copy of the GNU General Public License |
| 28 | * along with this program; if not, write to the Free Software |
| 29 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 30 | * MA 02111-1307 USA |
| 31 | * |
| 32 | * Linux-IrDA now supports four different types of IrDA sockets: |
| 33 | * |
| 34 | * o SOCK_STREAM: TinyTP connections with SAR disabled. The |
| 35 | * max SDU size is 0 for conn. of this type |
| 36 | * o SOCK_SEQPACKET: TinyTP connections with SAR enabled. TTP may |
| 37 | * fragment the messages, but will preserve |
| 38 | * the message boundaries |
| 39 | * o SOCK_DGRAM: IRDAPROTO_UNITDATA: TinyTP connections with Unitdata |
| 40 | * (unreliable) transfers |
| 41 | * IRDAPROTO_ULTRA: Connectionless and unreliable data |
| 42 | * |
| 43 | ********************************************************************/ |
| 44 | |
| 45 | #include <linux/config.h> |
| 46 | #include <linux/module.h> |
| 47 | #include <linux/types.h> |
| 48 | #include <linux/socket.h> |
| 49 | #include <linux/sockios.h> |
| 50 | #include <linux/init.h> |
| 51 | #include <linux/net.h> |
| 52 | #include <linux/irda.h> |
| 53 | #include <linux/poll.h> |
| 54 | |
| 55 | #include <asm/ioctls.h> /* TIOCOUTQ, TIOCINQ */ |
| 56 | #include <asm/uaccess.h> |
| 57 | |
| 58 | #include <net/sock.h> |
Arnaldo Carvalho de Melo | c752f07 | 2005-08-09 20:08:28 -0700 | [diff] [blame] | 59 | #include <net/tcp_states.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | #include <net/irda/af_irda.h> |
| 62 | |
| 63 | static int irda_create(struct socket *sock, int protocol); |
| 64 | |
| 65 | static struct proto_ops irda_stream_ops; |
| 66 | static struct proto_ops irda_seqpacket_ops; |
| 67 | static struct proto_ops irda_dgram_ops; |
| 68 | |
| 69 | #ifdef CONFIG_IRDA_ULTRA |
| 70 | static struct proto_ops irda_ultra_ops; |
| 71 | #define ULTRA_MAX_DATA 382 |
| 72 | #endif /* CONFIG_IRDA_ULTRA */ |
| 73 | |
| 74 | #define IRDA_MAX_HEADER (TTP_MAX_HEADER) |
| 75 | |
| 76 | /* |
| 77 | * Function irda_data_indication (instance, sap, skb) |
| 78 | * |
| 79 | * Received some data from TinyTP. Just queue it on the receive queue |
| 80 | * |
| 81 | */ |
| 82 | static int irda_data_indication(void *instance, void *sap, struct sk_buff *skb) |
| 83 | { |
| 84 | struct irda_sock *self; |
| 85 | struct sock *sk; |
| 86 | int err; |
| 87 | |
| 88 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); |
| 89 | |
| 90 | self = instance; |
| 91 | sk = instance; |
| 92 | IRDA_ASSERT(sk != NULL, return -1;); |
| 93 | |
| 94 | err = sock_queue_rcv_skb(sk, skb); |
| 95 | if (err) { |
| 96 | IRDA_DEBUG(1, "%s(), error: no more mem!\n", __FUNCTION__); |
| 97 | self->rx_flow = FLOW_STOP; |
| 98 | |
| 99 | /* When we return error, TTP will need to requeue the skb */ |
| 100 | return err; |
| 101 | } |
| 102 | |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | /* |
| 107 | * Function irda_disconnect_indication (instance, sap, reason, skb) |
| 108 | * |
| 109 | * Connection has been closed. Check reason to find out why |
| 110 | * |
| 111 | */ |
| 112 | static void irda_disconnect_indication(void *instance, void *sap, |
| 113 | LM_REASON reason, struct sk_buff *skb) |
| 114 | { |
| 115 | struct irda_sock *self; |
| 116 | struct sock *sk; |
| 117 | |
| 118 | self = instance; |
| 119 | |
| 120 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); |
| 121 | |
| 122 | /* Don't care about it, but let's not leak it */ |
| 123 | if(skb) |
| 124 | dev_kfree_skb(skb); |
| 125 | |
| 126 | sk = instance; |
| 127 | if (sk == NULL) { |
| 128 | IRDA_DEBUG(0, "%s(%p) : BUG : sk is NULL\n", |
| 129 | __FUNCTION__, self); |
| 130 | return; |
| 131 | } |
| 132 | |
| 133 | /* Prevent race conditions with irda_release() and irda_shutdown() */ |
| 134 | if (!sock_flag(sk, SOCK_DEAD) && sk->sk_state != TCP_CLOSE) { |
| 135 | sk->sk_state = TCP_CLOSE; |
| 136 | sk->sk_err = ECONNRESET; |
| 137 | sk->sk_shutdown |= SEND_SHUTDOWN; |
| 138 | |
| 139 | sk->sk_state_change(sk); |
| 140 | /* Uh-oh... Should use sock_orphan ? */ |
| 141 | sock_set_flag(sk, SOCK_DEAD); |
| 142 | |
| 143 | /* Close our TSAP. |
| 144 | * If we leave it open, IrLMP put it back into the list of |
| 145 | * unconnected LSAPs. The problem is that any incoming request |
| 146 | * can then be matched to this socket (and it will be, because |
| 147 | * it is at the head of the list). This would prevent any |
| 148 | * listening socket waiting on the same TSAP to get those |
| 149 | * requests. Some apps forget to close sockets, or hang to it |
| 150 | * a bit too long, so we may stay in this dead state long |
| 151 | * enough to be noticed... |
| 152 | * Note : all socket function do check sk->sk_state, so we are |
| 153 | * safe... |
| 154 | * Jean II |
| 155 | */ |
| 156 | if (self->tsap) { |
| 157 | irttp_close_tsap(self->tsap); |
| 158 | self->tsap = NULL; |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | /* Note : once we are there, there is not much you want to do |
| 163 | * with the socket anymore, apart from closing it. |
| 164 | * For example, bind() and connect() won't reset sk->sk_err, |
| 165 | * sk->sk_shutdown and sk->sk_flags to valid values... |
| 166 | * Jean II |
| 167 | */ |
| 168 | } |
| 169 | |
| 170 | /* |
| 171 | * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb) |
| 172 | * |
| 173 | * Connections has been confirmed by the remote device |
| 174 | * |
| 175 | */ |
| 176 | static void irda_connect_confirm(void *instance, void *sap, |
| 177 | struct qos_info *qos, |
| 178 | __u32 max_sdu_size, __u8 max_header_size, |
| 179 | struct sk_buff *skb) |
| 180 | { |
| 181 | struct irda_sock *self; |
| 182 | struct sock *sk; |
| 183 | |
| 184 | self = instance; |
| 185 | |
| 186 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); |
| 187 | |
| 188 | sk = instance; |
| 189 | if (sk == NULL) { |
| 190 | dev_kfree_skb(skb); |
| 191 | return; |
| 192 | } |
| 193 | |
| 194 | dev_kfree_skb(skb); |
| 195 | // Should be ??? skb_queue_tail(&sk->sk_receive_queue, skb); |
| 196 | |
| 197 | /* How much header space do we need to reserve */ |
| 198 | self->max_header_size = max_header_size; |
| 199 | |
| 200 | /* IrTTP max SDU size in transmit direction */ |
| 201 | self->max_sdu_size_tx = max_sdu_size; |
| 202 | |
| 203 | /* Find out what the largest chunk of data that we can transmit is */ |
| 204 | switch (sk->sk_type) { |
| 205 | case SOCK_STREAM: |
| 206 | if (max_sdu_size != 0) { |
| 207 | IRDA_ERROR("%s: max_sdu_size must be 0\n", |
| 208 | __FUNCTION__); |
| 209 | return; |
| 210 | } |
| 211 | self->max_data_size = irttp_get_max_seg_size(self->tsap); |
| 212 | break; |
| 213 | case SOCK_SEQPACKET: |
| 214 | if (max_sdu_size == 0) { |
| 215 | IRDA_ERROR("%s: max_sdu_size cannot be 0\n", |
| 216 | __FUNCTION__); |
| 217 | return; |
| 218 | } |
| 219 | self->max_data_size = max_sdu_size; |
| 220 | break; |
| 221 | default: |
| 222 | self->max_data_size = irttp_get_max_seg_size(self->tsap); |
| 223 | }; |
| 224 | |
| 225 | IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __FUNCTION__, |
| 226 | self->max_data_size); |
| 227 | |
| 228 | memcpy(&self->qos_tx, qos, sizeof(struct qos_info)); |
| 229 | |
| 230 | /* We are now connected! */ |
| 231 | sk->sk_state = TCP_ESTABLISHED; |
| 232 | sk->sk_state_change(sk); |
| 233 | } |
| 234 | |
| 235 | /* |
| 236 | * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata) |
| 237 | * |
| 238 | * Incoming connection |
| 239 | * |
| 240 | */ |
| 241 | static void irda_connect_indication(void *instance, void *sap, |
| 242 | struct qos_info *qos, __u32 max_sdu_size, |
| 243 | __u8 max_header_size, struct sk_buff *skb) |
| 244 | { |
| 245 | struct irda_sock *self; |
| 246 | struct sock *sk; |
| 247 | |
| 248 | self = instance; |
| 249 | |
| 250 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); |
| 251 | |
| 252 | sk = instance; |
| 253 | if (sk == NULL) { |
| 254 | dev_kfree_skb(skb); |
| 255 | return; |
| 256 | } |
| 257 | |
| 258 | /* How much header space do we need to reserve */ |
| 259 | self->max_header_size = max_header_size; |
| 260 | |
| 261 | /* IrTTP max SDU size in transmit direction */ |
| 262 | self->max_sdu_size_tx = max_sdu_size; |
| 263 | |
| 264 | /* Find out what the largest chunk of data that we can transmit is */ |
| 265 | switch (sk->sk_type) { |
| 266 | case SOCK_STREAM: |
| 267 | if (max_sdu_size != 0) { |
| 268 | IRDA_ERROR("%s: max_sdu_size must be 0\n", |
| 269 | __FUNCTION__); |
| 270 | kfree_skb(skb); |
| 271 | return; |
| 272 | } |
| 273 | self->max_data_size = irttp_get_max_seg_size(self->tsap); |
| 274 | break; |
| 275 | case SOCK_SEQPACKET: |
| 276 | if (max_sdu_size == 0) { |
| 277 | IRDA_ERROR("%s: max_sdu_size cannot be 0\n", |
| 278 | __FUNCTION__); |
| 279 | kfree_skb(skb); |
| 280 | return; |
| 281 | } |
| 282 | self->max_data_size = max_sdu_size; |
| 283 | break; |
| 284 | default: |
| 285 | self->max_data_size = irttp_get_max_seg_size(self->tsap); |
| 286 | }; |
| 287 | |
| 288 | IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __FUNCTION__, |
| 289 | self->max_data_size); |
| 290 | |
| 291 | memcpy(&self->qos_tx, qos, sizeof(struct qos_info)); |
| 292 | |
| 293 | skb_queue_tail(&sk->sk_receive_queue, skb); |
| 294 | sk->sk_state_change(sk); |
| 295 | } |
| 296 | |
| 297 | /* |
| 298 | * Function irda_connect_response (handle) |
| 299 | * |
| 300 | * Accept incoming connection |
| 301 | * |
| 302 | */ |
| 303 | static void irda_connect_response(struct irda_sock *self) |
| 304 | { |
| 305 | struct sk_buff *skb; |
| 306 | |
| 307 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); |
| 308 | |
| 309 | IRDA_ASSERT(self != NULL, return;); |
| 310 | |
| 311 | skb = dev_alloc_skb(64); |
| 312 | if (skb == NULL) { |
| 313 | IRDA_DEBUG(0, "%s() Unable to allocate sk_buff!\n", |
| 314 | __FUNCTION__); |
| 315 | return; |
| 316 | } |
| 317 | |
| 318 | /* Reserve space for MUX_CONTROL and LAP header */ |
| 319 | skb_reserve(skb, IRDA_MAX_HEADER); |
| 320 | |
| 321 | irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb); |
| 322 | } |
| 323 | |
| 324 | /* |
| 325 | * Function irda_flow_indication (instance, sap, flow) |
| 326 | * |
| 327 | * Used by TinyTP to tell us if it can accept more data or not |
| 328 | * |
| 329 | */ |
| 330 | static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow) |
| 331 | { |
| 332 | struct irda_sock *self; |
| 333 | struct sock *sk; |
| 334 | |
| 335 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); |
| 336 | |
| 337 | self = instance; |
| 338 | sk = instance; |
| 339 | IRDA_ASSERT(sk != NULL, return;); |
| 340 | |
| 341 | switch (flow) { |
| 342 | case FLOW_STOP: |
| 343 | IRDA_DEBUG(1, "%s(), IrTTP wants us to slow down\n", |
| 344 | __FUNCTION__); |
| 345 | self->tx_flow = flow; |
| 346 | break; |
| 347 | case FLOW_START: |
| 348 | self->tx_flow = flow; |
| 349 | IRDA_DEBUG(1, "%s(), IrTTP wants us to start again\n", |
| 350 | __FUNCTION__); |
| 351 | wake_up_interruptible(sk->sk_sleep); |
| 352 | break; |
| 353 | default: |
| 354 | IRDA_DEBUG(0, "%s(), Unknown flow command!\n", __FUNCTION__); |
| 355 | /* Unknown flow command, better stop */ |
| 356 | self->tx_flow = flow; |
| 357 | break; |
| 358 | } |
| 359 | } |
| 360 | |
| 361 | /* |
| 362 | * Function irda_getvalue_confirm (obj_id, value, priv) |
| 363 | * |
| 364 | * Got answer from remote LM-IAS, just pass object to requester... |
| 365 | * |
| 366 | * Note : duplicate from above, but we need our own version that |
| 367 | * doesn't touch the dtsap_sel and save the full value structure... |
| 368 | */ |
| 369 | static void irda_getvalue_confirm(int result, __u16 obj_id, |
| 370 | struct ias_value *value, void *priv) |
| 371 | { |
| 372 | struct irda_sock *self; |
| 373 | |
| 374 | self = (struct irda_sock *) priv; |
| 375 | if (!self) { |
| 376 | IRDA_WARNING("%s: lost myself!\n", __FUNCTION__); |
| 377 | return; |
| 378 | } |
| 379 | |
| 380 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); |
| 381 | |
| 382 | /* We probably don't need to make any more queries */ |
| 383 | iriap_close(self->iriap); |
| 384 | self->iriap = NULL; |
| 385 | |
| 386 | /* Check if request succeeded */ |
| 387 | if (result != IAS_SUCCESS) { |
| 388 | IRDA_DEBUG(1, "%s(), IAS query failed! (%d)\n", __FUNCTION__, |
| 389 | result); |
| 390 | |
| 391 | self->errno = result; /* We really need it later */ |
| 392 | |
| 393 | /* Wake up any processes waiting for result */ |
| 394 | wake_up_interruptible(&self->query_wait); |
| 395 | |
| 396 | return; |
| 397 | } |
| 398 | |
| 399 | /* Pass the object to the caller (so the caller must delete it) */ |
| 400 | self->ias_result = value; |
| 401 | self->errno = 0; |
| 402 | |
| 403 | /* Wake up any processes waiting for result */ |
| 404 | wake_up_interruptible(&self->query_wait); |
| 405 | } |
| 406 | |
| 407 | /* |
| 408 | * Function irda_selective_discovery_indication (discovery) |
| 409 | * |
| 410 | * Got a selective discovery indication from IrLMP. |
| 411 | * |
| 412 | * IrLMP is telling us that this node is new and matching our hint bit |
| 413 | * filter. Wake up any process waiting for answer... |
| 414 | */ |
| 415 | static void irda_selective_discovery_indication(discinfo_t *discovery, |
| 416 | DISCOVERY_MODE mode, |
| 417 | void *priv) |
| 418 | { |
| 419 | struct irda_sock *self; |
| 420 | |
| 421 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); |
| 422 | |
| 423 | self = (struct irda_sock *) priv; |
| 424 | if (!self) { |
| 425 | IRDA_WARNING("%s: lost myself!\n", __FUNCTION__); |
| 426 | return; |
| 427 | } |
| 428 | |
| 429 | /* Pass parameter to the caller */ |
| 430 | self->cachedaddr = discovery->daddr; |
| 431 | |
| 432 | /* Wake up process if its waiting for device to be discovered */ |
| 433 | wake_up_interruptible(&self->query_wait); |
| 434 | } |
| 435 | |
| 436 | /* |
| 437 | * Function irda_discovery_timeout (priv) |
| 438 | * |
| 439 | * Timeout in the selective discovery process |
| 440 | * |
| 441 | * We were waiting for a node to be discovered, but nothing has come up |
| 442 | * so far. Wake up the user and tell him that we failed... |
| 443 | */ |
| 444 | static void irda_discovery_timeout(u_long priv) |
| 445 | { |
| 446 | struct irda_sock *self; |
| 447 | |
| 448 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); |
| 449 | |
| 450 | self = (struct irda_sock *) priv; |
| 451 | IRDA_ASSERT(self != NULL, return;); |
| 452 | |
| 453 | /* Nothing for the caller */ |
| 454 | self->cachelog = NULL; |
| 455 | self->cachedaddr = 0; |
| 456 | self->errno = -ETIME; |
| 457 | |
| 458 | /* Wake up process if its still waiting... */ |
| 459 | wake_up_interruptible(&self->query_wait); |
| 460 | } |
| 461 | |
| 462 | /* |
| 463 | * Function irda_open_tsap (self) |
| 464 | * |
| 465 | * Open local Transport Service Access Point (TSAP) |
| 466 | * |
| 467 | */ |
| 468 | static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name) |
| 469 | { |
| 470 | notify_t notify; |
| 471 | |
| 472 | if (self->tsap) { |
| 473 | IRDA_WARNING("%s: busy!\n", __FUNCTION__); |
| 474 | return -EBUSY; |
| 475 | } |
| 476 | |
| 477 | /* Initialize callbacks to be used by the IrDA stack */ |
| 478 | irda_notify_init(¬ify); |
| 479 | notify.connect_confirm = irda_connect_confirm; |
| 480 | notify.connect_indication = irda_connect_indication; |
| 481 | notify.disconnect_indication = irda_disconnect_indication; |
| 482 | notify.data_indication = irda_data_indication; |
| 483 | notify.udata_indication = irda_data_indication; |
| 484 | notify.flow_indication = irda_flow_indication; |
| 485 | notify.instance = self; |
| 486 | strncpy(notify.name, name, NOTIFY_MAX_NAME); |
| 487 | |
| 488 | self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT, |
| 489 | ¬ify); |
| 490 | if (self->tsap == NULL) { |
| 491 | IRDA_DEBUG(0, "%s(), Unable to allocate TSAP!\n", |
| 492 | __FUNCTION__); |
| 493 | return -ENOMEM; |
| 494 | } |
| 495 | /* Remember which TSAP selector we actually got */ |
| 496 | self->stsap_sel = self->tsap->stsap_sel; |
| 497 | |
| 498 | return 0; |
| 499 | } |
| 500 | |
| 501 | /* |
| 502 | * Function irda_open_lsap (self) |
| 503 | * |
| 504 | * Open local Link Service Access Point (LSAP). Used for opening Ultra |
| 505 | * sockets |
| 506 | */ |
| 507 | #ifdef CONFIG_IRDA_ULTRA |
| 508 | static int irda_open_lsap(struct irda_sock *self, int pid) |
| 509 | { |
| 510 | notify_t notify; |
| 511 | |
| 512 | if (self->lsap) { |
| 513 | IRDA_WARNING("%s(), busy!\n", __FUNCTION__); |
| 514 | return -EBUSY; |
| 515 | } |
| 516 | |
| 517 | /* Initialize callbacks to be used by the IrDA stack */ |
| 518 | irda_notify_init(¬ify); |
| 519 | notify.udata_indication = irda_data_indication; |
| 520 | notify.instance = self; |
| 521 | strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME); |
| 522 | |
| 523 | self->lsap = irlmp_open_lsap(LSAP_CONNLESS, ¬ify, pid); |
| 524 | if (self->lsap == NULL) { |
| 525 | IRDA_DEBUG( 0, "%s(), Unable to allocate LSAP!\n", __FUNCTION__); |
| 526 | return -ENOMEM; |
| 527 | } |
| 528 | |
| 529 | return 0; |
| 530 | } |
| 531 | #endif /* CONFIG_IRDA_ULTRA */ |
| 532 | |
| 533 | /* |
| 534 | * Function irda_find_lsap_sel (self, name) |
| 535 | * |
| 536 | * Try to lookup LSAP selector in remote LM-IAS |
| 537 | * |
| 538 | * Basically, we start a IAP query, and then go to sleep. When the query |
| 539 | * return, irda_getvalue_confirm will wake us up, and we can examine the |
| 540 | * result of the query... |
| 541 | * Note that in some case, the query fail even before we go to sleep, |
| 542 | * creating some races... |
| 543 | */ |
| 544 | static int irda_find_lsap_sel(struct irda_sock *self, char *name) |
| 545 | { |
| 546 | IRDA_DEBUG(2, "%s(%p, %s)\n", __FUNCTION__, self, name); |
| 547 | |
| 548 | IRDA_ASSERT(self != NULL, return -1;); |
| 549 | |
| 550 | if (self->iriap) { |
| 551 | IRDA_WARNING("%s(): busy with a previous query\n", |
| 552 | __FUNCTION__); |
| 553 | return -EBUSY; |
| 554 | } |
| 555 | |
| 556 | self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self, |
| 557 | irda_getvalue_confirm); |
| 558 | if(self->iriap == NULL) |
| 559 | return -ENOMEM; |
| 560 | |
| 561 | /* Treat unexpected wakeup as disconnect */ |
| 562 | self->errno = -EHOSTUNREACH; |
| 563 | |
| 564 | /* Query remote LM-IAS */ |
| 565 | iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr, |
| 566 | name, "IrDA:TinyTP:LsapSel"); |
| 567 | |
| 568 | /* Wait for answer, if not yet finished (or failed) */ |
| 569 | if (wait_event_interruptible(self->query_wait, (self->iriap==NULL))) |
| 570 | /* Treat signals as disconnect */ |
| 571 | return -EHOSTUNREACH; |
| 572 | |
| 573 | /* Check what happened */ |
| 574 | if (self->errno) |
| 575 | { |
| 576 | /* Requested object/attribute doesn't exist */ |
| 577 | if((self->errno == IAS_CLASS_UNKNOWN) || |
| 578 | (self->errno == IAS_ATTRIB_UNKNOWN)) |
| 579 | return (-EADDRNOTAVAIL); |
| 580 | else |
| 581 | return (-EHOSTUNREACH); |
| 582 | } |
| 583 | |
| 584 | /* Get the remote TSAP selector */ |
| 585 | switch (self->ias_result->type) { |
| 586 | case IAS_INTEGER: |
| 587 | IRDA_DEBUG(4, "%s() int=%d\n", |
| 588 | __FUNCTION__, self->ias_result->t.integer); |
| 589 | |
| 590 | if (self->ias_result->t.integer != -1) |
| 591 | self->dtsap_sel = self->ias_result->t.integer; |
| 592 | else |
| 593 | self->dtsap_sel = 0; |
| 594 | break; |
| 595 | default: |
| 596 | self->dtsap_sel = 0; |
| 597 | IRDA_DEBUG(0, "%s(), bad type!\n", __FUNCTION__); |
| 598 | break; |
| 599 | } |
| 600 | if (self->ias_result) |
| 601 | irias_delete_value(self->ias_result); |
| 602 | |
| 603 | if (self->dtsap_sel) |
| 604 | return 0; |
| 605 | |
| 606 | return -EADDRNOTAVAIL; |
| 607 | } |
| 608 | |
| 609 | /* |
| 610 | * Function irda_discover_daddr_and_lsap_sel (self, name) |
| 611 | * |
| 612 | * This try to find a device with the requested service. |
| 613 | * |
| 614 | * It basically look into the discovery log. For each address in the list, |
| 615 | * it queries the LM-IAS of the device to find if this device offer |
| 616 | * the requested service. |
| 617 | * If there is more than one node supporting the service, we complain |
| 618 | * to the user (it should move devices around). |
| 619 | * The, we set both the destination address and the lsap selector to point |
| 620 | * on the service on the unique device we have found. |
| 621 | * |
| 622 | * Note : this function fails if there is more than one device in range, |
| 623 | * because IrLMP doesn't disconnect the LAP when the last LSAP is closed. |
| 624 | * Moreover, we would need to wait the LAP disconnection... |
| 625 | */ |
| 626 | static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name) |
| 627 | { |
| 628 | discinfo_t *discoveries; /* Copy of the discovery log */ |
| 629 | int number; /* Number of nodes in the log */ |
| 630 | int i; |
| 631 | int err = -ENETUNREACH; |
| 632 | __u32 daddr = DEV_ADDR_ANY; /* Address we found the service on */ |
| 633 | __u8 dtsap_sel = 0x0; /* TSAP associated with it */ |
| 634 | |
| 635 | IRDA_DEBUG(2, "%s(), name=%s\n", __FUNCTION__, name); |
| 636 | |
| 637 | IRDA_ASSERT(self != NULL, return -1;); |
| 638 | |
| 639 | /* Ask lmp for the current discovery log |
| 640 | * Note : we have to use irlmp_get_discoveries(), as opposed |
| 641 | * to play with the cachelog directly, because while we are |
| 642 | * making our ias query, le log might change... */ |
| 643 | discoveries = irlmp_get_discoveries(&number, self->mask.word, |
| 644 | self->nslots); |
| 645 | /* Check if the we got some results */ |
| 646 | if (discoveries == NULL) |
| 647 | return -ENETUNREACH; /* No nodes discovered */ |
| 648 | |
| 649 | /* |
| 650 | * Now, check all discovered devices (if any), and connect |
| 651 | * client only about the services that the client is |
| 652 | * interested in... |
| 653 | */ |
| 654 | for(i = 0; i < number; i++) { |
| 655 | /* Try the address in the log */ |
| 656 | self->daddr = discoveries[i].daddr; |
| 657 | self->saddr = 0x0; |
| 658 | IRDA_DEBUG(1, "%s(), trying daddr = %08x\n", |
| 659 | __FUNCTION__, self->daddr); |
| 660 | |
| 661 | /* Query remote LM-IAS for this service */ |
| 662 | err = irda_find_lsap_sel(self, name); |
| 663 | switch (err) { |
| 664 | case 0: |
| 665 | /* We found the requested service */ |
| 666 | if(daddr != DEV_ADDR_ANY) { |
| 667 | IRDA_DEBUG(1, "%s(), discovered service ''%s'' in two different devices !!!\n", |
| 668 | __FUNCTION__, name); |
| 669 | self->daddr = DEV_ADDR_ANY; |
| 670 | kfree(discoveries); |
| 671 | return(-ENOTUNIQ); |
| 672 | } |
| 673 | /* First time we found that one, save it ! */ |
| 674 | daddr = self->daddr; |
| 675 | dtsap_sel = self->dtsap_sel; |
| 676 | break; |
| 677 | case -EADDRNOTAVAIL: |
| 678 | /* Requested service simply doesn't exist on this node */ |
| 679 | break; |
| 680 | default: |
| 681 | /* Something bad did happen :-( */ |
| 682 | IRDA_DEBUG(0, "%s(), unexpected IAS query failure\n", __FUNCTION__); |
| 683 | self->daddr = DEV_ADDR_ANY; |
| 684 | kfree(discoveries); |
| 685 | return(-EHOSTUNREACH); |
| 686 | break; |
| 687 | } |
| 688 | } |
| 689 | /* Cleanup our copy of the discovery log */ |
| 690 | kfree(discoveries); |
| 691 | |
| 692 | /* Check out what we found */ |
| 693 | if(daddr == DEV_ADDR_ANY) { |
| 694 | IRDA_DEBUG(1, "%s(), cannot discover service ''%s'' in any device !!!\n", |
| 695 | __FUNCTION__, name); |
| 696 | self->daddr = DEV_ADDR_ANY; |
| 697 | return(-EADDRNOTAVAIL); |
| 698 | } |
| 699 | |
| 700 | /* Revert back to discovered device & service */ |
| 701 | self->daddr = daddr; |
| 702 | self->saddr = 0x0; |
| 703 | self->dtsap_sel = dtsap_sel; |
| 704 | |
| 705 | IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n", |
| 706 | __FUNCTION__, name, self->daddr); |
| 707 | |
| 708 | return 0; |
| 709 | } |
| 710 | |
| 711 | /* |
| 712 | * Function irda_getname (sock, uaddr, uaddr_len, peer) |
| 713 | * |
| 714 | * Return the our own, or peers socket address (sockaddr_irda) |
| 715 | * |
| 716 | */ |
| 717 | static int irda_getname(struct socket *sock, struct sockaddr *uaddr, |
| 718 | int *uaddr_len, int peer) |
| 719 | { |
| 720 | struct sockaddr_irda saddr; |
| 721 | struct sock *sk = sock->sk; |
| 722 | struct irda_sock *self = irda_sk(sk); |
| 723 | |
| 724 | if (peer) { |
| 725 | if (sk->sk_state != TCP_ESTABLISHED) |
| 726 | return -ENOTCONN; |
| 727 | |
| 728 | saddr.sir_family = AF_IRDA; |
| 729 | saddr.sir_lsap_sel = self->dtsap_sel; |
| 730 | saddr.sir_addr = self->daddr; |
| 731 | } else { |
| 732 | saddr.sir_family = AF_IRDA; |
| 733 | saddr.sir_lsap_sel = self->stsap_sel; |
| 734 | saddr.sir_addr = self->saddr; |
| 735 | } |
| 736 | |
| 737 | IRDA_DEBUG(1, "%s(), tsap_sel = %#x\n", __FUNCTION__, saddr.sir_lsap_sel); |
| 738 | IRDA_DEBUG(1, "%s(), addr = %08x\n", __FUNCTION__, saddr.sir_addr); |
| 739 | |
| 740 | /* uaddr_len come to us uninitialised */ |
| 741 | *uaddr_len = sizeof (struct sockaddr_irda); |
| 742 | memcpy(uaddr, &saddr, *uaddr_len); |
| 743 | |
| 744 | return 0; |
| 745 | } |
| 746 | |
| 747 | /* |
| 748 | * Function irda_listen (sock, backlog) |
| 749 | * |
| 750 | * Just move to the listen state |
| 751 | * |
| 752 | */ |
| 753 | static int irda_listen(struct socket *sock, int backlog) |
| 754 | { |
| 755 | struct sock *sk = sock->sk; |
| 756 | |
| 757 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); |
| 758 | |
| 759 | if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) && |
| 760 | (sk->sk_type != SOCK_DGRAM)) |
| 761 | return -EOPNOTSUPP; |
| 762 | |
| 763 | if (sk->sk_state != TCP_LISTEN) { |
| 764 | sk->sk_max_ack_backlog = backlog; |
| 765 | sk->sk_state = TCP_LISTEN; |
| 766 | |
| 767 | return 0; |
| 768 | } |
| 769 | |
| 770 | return -EOPNOTSUPP; |
| 771 | } |
| 772 | |
| 773 | /* |
| 774 | * Function irda_bind (sock, uaddr, addr_len) |
| 775 | * |
| 776 | * Used by servers to register their well known TSAP |
| 777 | * |
| 778 | */ |
| 779 | static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
| 780 | { |
| 781 | struct sock *sk = sock->sk; |
| 782 | struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr; |
| 783 | struct irda_sock *self = irda_sk(sk); |
| 784 | int err; |
| 785 | |
| 786 | IRDA_ASSERT(self != NULL, return -1;); |
| 787 | |
| 788 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); |
| 789 | |
| 790 | if (addr_len != sizeof(struct sockaddr_irda)) |
| 791 | return -EINVAL; |
| 792 | |
| 793 | #ifdef CONFIG_IRDA_ULTRA |
| 794 | /* Special care for Ultra sockets */ |
| 795 | if ((sk->sk_type == SOCK_DGRAM) && |
| 796 | (sk->sk_protocol == IRDAPROTO_ULTRA)) { |
| 797 | self->pid = addr->sir_lsap_sel; |
| 798 | if (self->pid & 0x80) { |
| 799 | IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __FUNCTION__); |
| 800 | return -EOPNOTSUPP; |
| 801 | } |
| 802 | err = irda_open_lsap(self, self->pid); |
| 803 | if (err < 0) |
| 804 | return err; |
| 805 | |
| 806 | /* Pretend we are connected */ |
| 807 | sock->state = SS_CONNECTED; |
| 808 | sk->sk_state = TCP_ESTABLISHED; |
| 809 | |
| 810 | return 0; |
| 811 | } |
| 812 | #endif /* CONFIG_IRDA_ULTRA */ |
| 813 | |
| 814 | err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name); |
| 815 | if (err < 0) |
| 816 | return err; |
| 817 | |
| 818 | /* Register with LM-IAS */ |
| 819 | self->ias_obj = irias_new_object(addr->sir_name, jiffies); |
| 820 | irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel", |
| 821 | self->stsap_sel, IAS_KERNEL_ATTR); |
| 822 | irias_insert_object(self->ias_obj); |
| 823 | |
| 824 | return 0; |
| 825 | } |
| 826 | |
| 827 | /* |
| 828 | * Function irda_accept (sock, newsock, flags) |
| 829 | * |
| 830 | * Wait for incoming connection |
| 831 | * |
| 832 | */ |
| 833 | static int irda_accept(struct socket *sock, struct socket *newsock, int flags) |
| 834 | { |
| 835 | struct sock *sk = sock->sk; |
| 836 | struct irda_sock *new, *self = irda_sk(sk); |
| 837 | struct sock *newsk; |
| 838 | struct sk_buff *skb; |
| 839 | int err; |
| 840 | |
| 841 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); |
| 842 | |
| 843 | IRDA_ASSERT(self != NULL, return -1;); |
| 844 | |
| 845 | err = irda_create(newsock, sk->sk_protocol); |
| 846 | if (err) |
| 847 | return err; |
| 848 | |
| 849 | if (sock->state != SS_UNCONNECTED) |
| 850 | return -EINVAL; |
| 851 | |
| 852 | if ((sk = sock->sk) == NULL) |
| 853 | return -EINVAL; |
| 854 | |
| 855 | if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) && |
| 856 | (sk->sk_type != SOCK_DGRAM)) |
| 857 | return -EOPNOTSUPP; |
| 858 | |
| 859 | if (sk->sk_state != TCP_LISTEN) |
| 860 | return -EINVAL; |
| 861 | |
| 862 | /* |
| 863 | * The read queue this time is holding sockets ready to use |
| 864 | * hooked into the SABM we saved |
| 865 | */ |
| 866 | |
| 867 | /* |
| 868 | * We can perform the accept only if there is incoming data |
| 869 | * on the listening socket. |
| 870 | * So, we will block the caller until we receive any data. |
| 871 | * If the caller was waiting on select() or poll() before |
| 872 | * calling us, the data is waiting for us ;-) |
| 873 | * Jean II |
| 874 | */ |
| 875 | skb = skb_dequeue(&sk->sk_receive_queue); |
| 876 | if (skb == NULL) { |
| 877 | int ret = 0; |
| 878 | DECLARE_WAITQUEUE(waitq, current); |
| 879 | |
| 880 | /* Non blocking operation */ |
| 881 | if (flags & O_NONBLOCK) |
| 882 | return -EWOULDBLOCK; |
| 883 | |
| 884 | /* The following code is a cut'n'paste of the |
| 885 | * wait_event_interruptible() macro. |
| 886 | * We don't us the macro because the condition has |
| 887 | * side effects : we want to make sure that only one |
| 888 | * skb get dequeued - Jean II */ |
| 889 | add_wait_queue(sk->sk_sleep, &waitq); |
| 890 | for (;;) { |
| 891 | set_current_state(TASK_INTERRUPTIBLE); |
| 892 | skb = skb_dequeue(&sk->sk_receive_queue); |
| 893 | if (skb != NULL) |
| 894 | break; |
| 895 | if (!signal_pending(current)) { |
| 896 | schedule(); |
| 897 | continue; |
| 898 | } |
| 899 | ret = -ERESTARTSYS; |
| 900 | break; |
| 901 | } |
| 902 | current->state = TASK_RUNNING; |
| 903 | remove_wait_queue(sk->sk_sleep, &waitq); |
| 904 | if(ret) |
| 905 | return -ERESTARTSYS; |
| 906 | } |
| 907 | |
| 908 | newsk = newsock->sk; |
| 909 | newsk->sk_state = TCP_ESTABLISHED; |
| 910 | |
| 911 | new = irda_sk(newsk); |
| 912 | IRDA_ASSERT(new != NULL, return -1;); |
| 913 | |
| 914 | /* Now attach up the new socket */ |
| 915 | new->tsap = irttp_dup(self->tsap, new); |
| 916 | if (!new->tsap) { |
| 917 | IRDA_DEBUG(0, "%s(), dup failed!\n", __FUNCTION__); |
| 918 | kfree_skb(skb); |
| 919 | return -1; |
| 920 | } |
| 921 | |
| 922 | new->stsap_sel = new->tsap->stsap_sel; |
| 923 | new->dtsap_sel = new->tsap->dtsap_sel; |
| 924 | new->saddr = irttp_get_saddr(new->tsap); |
| 925 | new->daddr = irttp_get_daddr(new->tsap); |
| 926 | |
| 927 | new->max_sdu_size_tx = self->max_sdu_size_tx; |
| 928 | new->max_sdu_size_rx = self->max_sdu_size_rx; |
| 929 | new->max_data_size = self->max_data_size; |
| 930 | new->max_header_size = self->max_header_size; |
| 931 | |
| 932 | memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info)); |
| 933 | |
| 934 | /* Clean up the original one to keep it in listen state */ |
| 935 | irttp_listen(self->tsap); |
| 936 | |
| 937 | /* Wow ! What is that ? Jean II */ |
| 938 | skb->sk = NULL; |
| 939 | skb->destructor = NULL; |
| 940 | kfree_skb(skb); |
| 941 | sk->sk_ack_backlog--; |
| 942 | |
| 943 | newsock->state = SS_CONNECTED; |
| 944 | |
| 945 | irda_connect_response(new); |
| 946 | |
| 947 | return 0; |
| 948 | } |
| 949 | |
| 950 | /* |
| 951 | * Function irda_connect (sock, uaddr, addr_len, flags) |
| 952 | * |
| 953 | * Connect to a IrDA device |
| 954 | * |
| 955 | * The main difference with a "standard" connect is that with IrDA we need |
| 956 | * to resolve the service name into a TSAP selector (in TCP, port number |
| 957 | * doesn't have to be resolved). |
| 958 | * Because of this service name resoltion, we can offer "auto-connect", |
| 959 | * where we connect to a service without specifying a destination address. |
| 960 | * |
| 961 | * Note : by consulting "errno", the user space caller may learn the cause |
| 962 | * of the failure. Most of them are visible in the function, others may come |
| 963 | * from subroutines called and are listed here : |
| 964 | * o EBUSY : already processing a connect |
| 965 | * o EHOSTUNREACH : bad addr->sir_addr argument |
| 966 | * o EADDRNOTAVAIL : bad addr->sir_name argument |
| 967 | * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect) |
| 968 | * o ENETUNREACH : no node found on the network (auto-connect) |
| 969 | */ |
| 970 | static int irda_connect(struct socket *sock, struct sockaddr *uaddr, |
| 971 | int addr_len, int flags) |
| 972 | { |
| 973 | struct sock *sk = sock->sk; |
| 974 | struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr; |
| 975 | struct irda_sock *self = irda_sk(sk); |
| 976 | int err; |
| 977 | |
| 978 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); |
| 979 | |
| 980 | /* Don't allow connect for Ultra sockets */ |
| 981 | if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA)) |
| 982 | return -ESOCKTNOSUPPORT; |
| 983 | |
| 984 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { |
| 985 | sock->state = SS_CONNECTED; |
| 986 | return 0; /* Connect completed during a ERESTARTSYS event */ |
| 987 | } |
| 988 | |
| 989 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { |
| 990 | sock->state = SS_UNCONNECTED; |
| 991 | return -ECONNREFUSED; |
| 992 | } |
| 993 | |
| 994 | if (sk->sk_state == TCP_ESTABLISHED) |
| 995 | return -EISCONN; /* No reconnect on a seqpacket socket */ |
| 996 | |
| 997 | sk->sk_state = TCP_CLOSE; |
| 998 | sock->state = SS_UNCONNECTED; |
| 999 | |
| 1000 | if (addr_len != sizeof(struct sockaddr_irda)) |
| 1001 | return -EINVAL; |
| 1002 | |
| 1003 | /* Check if user supplied any destination device address */ |
| 1004 | if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) { |
| 1005 | /* Try to find one suitable */ |
| 1006 | err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name); |
| 1007 | if (err) { |
| 1008 | IRDA_DEBUG(0, "%s(), auto-connect failed!\n", __FUNCTION__); |
| 1009 | return err; |
| 1010 | } |
| 1011 | } else { |
| 1012 | /* Use the one provided by the user */ |
| 1013 | self->daddr = addr->sir_addr; |
| 1014 | IRDA_DEBUG(1, "%s(), daddr = %08x\n", __FUNCTION__, self->daddr); |
| 1015 | |
| 1016 | /* If we don't have a valid service name, we assume the |
| 1017 | * user want to connect on a specific LSAP. Prevent |
| 1018 | * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */ |
| 1019 | if((addr->sir_name[0] != '\0') || |
| 1020 | (addr->sir_lsap_sel >= 0x70)) { |
| 1021 | /* Query remote LM-IAS using service name */ |
| 1022 | err = irda_find_lsap_sel(self, addr->sir_name); |
| 1023 | if (err) { |
| 1024 | IRDA_DEBUG(0, "%s(), connect failed!\n", __FUNCTION__); |
| 1025 | return err; |
| 1026 | } |
| 1027 | } else { |
| 1028 | /* Directly connect to the remote LSAP |
| 1029 | * specified by the sir_lsap field. |
| 1030 | * Please use with caution, in IrDA LSAPs are |
| 1031 | * dynamic and there is no "well-known" LSAP. */ |
| 1032 | self->dtsap_sel = addr->sir_lsap_sel; |
| 1033 | } |
| 1034 | } |
| 1035 | |
| 1036 | /* Check if we have opened a local TSAP */ |
| 1037 | if (!self->tsap) |
| 1038 | irda_open_tsap(self, LSAP_ANY, addr->sir_name); |
| 1039 | |
| 1040 | /* Move to connecting socket, start sending Connect Requests */ |
| 1041 | sock->state = SS_CONNECTING; |
| 1042 | sk->sk_state = TCP_SYN_SENT; |
| 1043 | |
| 1044 | /* Connect to remote device */ |
| 1045 | err = irttp_connect_request(self->tsap, self->dtsap_sel, |
| 1046 | self->saddr, self->daddr, NULL, |
| 1047 | self->max_sdu_size_rx, NULL); |
| 1048 | if (err) { |
| 1049 | IRDA_DEBUG(0, "%s(), connect failed!\n", __FUNCTION__); |
| 1050 | return err; |
| 1051 | } |
| 1052 | |
| 1053 | /* Now the loop */ |
| 1054 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) |
| 1055 | return -EINPROGRESS; |
| 1056 | |
| 1057 | if (wait_event_interruptible(*(sk->sk_sleep), |
| 1058 | (sk->sk_state != TCP_SYN_SENT))) |
| 1059 | return -ERESTARTSYS; |
| 1060 | |
| 1061 | if (sk->sk_state != TCP_ESTABLISHED) { |
| 1062 | sock->state = SS_UNCONNECTED; |
| 1063 | return sock_error(sk); /* Always set at this point */ |
| 1064 | } |
| 1065 | |
| 1066 | sock->state = SS_CONNECTED; |
| 1067 | |
| 1068 | /* At this point, IrLMP has assigned our source address */ |
| 1069 | self->saddr = irttp_get_saddr(self->tsap); |
| 1070 | |
| 1071 | return 0; |
| 1072 | } |
| 1073 | |
| 1074 | static struct proto irda_proto = { |
| 1075 | .name = "IRDA", |
| 1076 | .owner = THIS_MODULE, |
| 1077 | .obj_size = sizeof(struct irda_sock), |
| 1078 | }; |
| 1079 | |
| 1080 | /* |
| 1081 | * Function irda_create (sock, protocol) |
| 1082 | * |
| 1083 | * Create IrDA socket |
| 1084 | * |
| 1085 | */ |
| 1086 | static int irda_create(struct socket *sock, int protocol) |
| 1087 | { |
| 1088 | struct sock *sk; |
| 1089 | struct irda_sock *self; |
| 1090 | |
| 1091 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); |
| 1092 | |
| 1093 | /* Check for valid socket type */ |
| 1094 | switch (sock->type) { |
| 1095 | case SOCK_STREAM: /* For TTP connections with SAR disabled */ |
| 1096 | case SOCK_SEQPACKET: /* For TTP connections with SAR enabled */ |
| 1097 | case SOCK_DGRAM: /* For TTP Unitdata or LMP Ultra transfers */ |
| 1098 | break; |
| 1099 | default: |
| 1100 | return -ESOCKTNOSUPPORT; |
| 1101 | } |
| 1102 | |
| 1103 | /* Allocate networking socket */ |
| 1104 | sk = sk_alloc(PF_IRDA, GFP_ATOMIC, &irda_proto, 1); |
| 1105 | if (sk == NULL) |
| 1106 | return -ENOMEM; |
| 1107 | |
| 1108 | self = irda_sk(sk); |
| 1109 | IRDA_DEBUG(2, "%s() : self is %p\n", __FUNCTION__, self); |
| 1110 | |
| 1111 | init_waitqueue_head(&self->query_wait); |
| 1112 | |
| 1113 | /* Initialise networking socket struct */ |
| 1114 | sock_init_data(sock, sk); /* Note : set sk->sk_refcnt to 1 */ |
| 1115 | sk->sk_family = PF_IRDA; |
| 1116 | sk->sk_protocol = protocol; |
| 1117 | |
| 1118 | switch (sock->type) { |
| 1119 | case SOCK_STREAM: |
| 1120 | sock->ops = &irda_stream_ops; |
| 1121 | self->max_sdu_size_rx = TTP_SAR_DISABLE; |
| 1122 | break; |
| 1123 | case SOCK_SEQPACKET: |
| 1124 | sock->ops = &irda_seqpacket_ops; |
| 1125 | self->max_sdu_size_rx = TTP_SAR_UNBOUND; |
| 1126 | break; |
| 1127 | case SOCK_DGRAM: |
| 1128 | switch (protocol) { |
| 1129 | #ifdef CONFIG_IRDA_ULTRA |
| 1130 | case IRDAPROTO_ULTRA: |
| 1131 | sock->ops = &irda_ultra_ops; |
| 1132 | /* Initialise now, because we may send on unbound |
| 1133 | * sockets. Jean II */ |
| 1134 | self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER; |
| 1135 | self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER; |
| 1136 | break; |
| 1137 | #endif /* CONFIG_IRDA_ULTRA */ |
| 1138 | case IRDAPROTO_UNITDATA: |
| 1139 | sock->ops = &irda_dgram_ops; |
| 1140 | /* We let Unitdata conn. be like seqpack conn. */ |
| 1141 | self->max_sdu_size_rx = TTP_SAR_UNBOUND; |
| 1142 | break; |
| 1143 | default: |
| 1144 | IRDA_ERROR("%s: protocol not supported!\n", |
| 1145 | __FUNCTION__); |
| 1146 | return -ESOCKTNOSUPPORT; |
| 1147 | } |
| 1148 | break; |
| 1149 | default: |
| 1150 | return -ESOCKTNOSUPPORT; |
| 1151 | } |
| 1152 | |
| 1153 | /* Register as a client with IrLMP */ |
| 1154 | self->ckey = irlmp_register_client(0, NULL, NULL, NULL); |
| 1155 | self->mask.word = 0xffff; |
| 1156 | self->rx_flow = self->tx_flow = FLOW_START; |
| 1157 | self->nslots = DISCOVERY_DEFAULT_SLOTS; |
| 1158 | self->daddr = DEV_ADDR_ANY; /* Until we get connected */ |
| 1159 | self->saddr = 0x0; /* so IrLMP assign us any link */ |
| 1160 | return 0; |
| 1161 | } |
| 1162 | |
| 1163 | /* |
| 1164 | * Function irda_destroy_socket (self) |
| 1165 | * |
| 1166 | * Destroy socket |
| 1167 | * |
| 1168 | */ |
| 1169 | static void irda_destroy_socket(struct irda_sock *self) |
| 1170 | { |
| 1171 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); |
| 1172 | |
| 1173 | IRDA_ASSERT(self != NULL, return;); |
| 1174 | |
| 1175 | /* Unregister with IrLMP */ |
| 1176 | irlmp_unregister_client(self->ckey); |
| 1177 | irlmp_unregister_service(self->skey); |
| 1178 | |
| 1179 | /* Unregister with LM-IAS */ |
| 1180 | if (self->ias_obj) { |
| 1181 | irias_delete_object(self->ias_obj); |
| 1182 | self->ias_obj = NULL; |
| 1183 | } |
| 1184 | |
| 1185 | if (self->iriap) { |
| 1186 | iriap_close(self->iriap); |
| 1187 | self->iriap = NULL; |
| 1188 | } |
| 1189 | |
| 1190 | if (self->tsap) { |
| 1191 | irttp_disconnect_request(self->tsap, NULL, P_NORMAL); |
| 1192 | irttp_close_tsap(self->tsap); |
| 1193 | self->tsap = NULL; |
| 1194 | } |
| 1195 | #ifdef CONFIG_IRDA_ULTRA |
| 1196 | if (self->lsap) { |
| 1197 | irlmp_close_lsap(self->lsap); |
| 1198 | self->lsap = NULL; |
| 1199 | } |
| 1200 | #endif /* CONFIG_IRDA_ULTRA */ |
| 1201 | } |
| 1202 | |
| 1203 | /* |
| 1204 | * Function irda_release (sock) |
| 1205 | */ |
| 1206 | static int irda_release(struct socket *sock) |
| 1207 | { |
| 1208 | struct sock *sk = sock->sk; |
| 1209 | |
| 1210 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); |
| 1211 | |
| 1212 | if (sk == NULL) |
| 1213 | return 0; |
| 1214 | |
| 1215 | sk->sk_state = TCP_CLOSE; |
| 1216 | sk->sk_shutdown |= SEND_SHUTDOWN; |
| 1217 | sk->sk_state_change(sk); |
| 1218 | |
| 1219 | /* Destroy IrDA socket */ |
| 1220 | irda_destroy_socket(irda_sk(sk)); |
| 1221 | |
| 1222 | sock_orphan(sk); |
| 1223 | sock->sk = NULL; |
| 1224 | |
| 1225 | /* Purge queues (see sock_init_data()) */ |
| 1226 | skb_queue_purge(&sk->sk_receive_queue); |
| 1227 | |
| 1228 | /* Destroy networking socket if we are the last reference on it, |
| 1229 | * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */ |
| 1230 | sock_put(sk); |
| 1231 | |
| 1232 | /* Notes on socket locking and deallocation... - Jean II |
| 1233 | * In theory we should put pairs of sock_hold() / sock_put() to |
| 1234 | * prevent the socket to be destroyed whenever there is an |
| 1235 | * outstanding request or outstanding incoming packet or event. |
| 1236 | * |
| 1237 | * 1) This may include IAS request, both in connect and getsockopt. |
| 1238 | * Unfortunately, the situation is a bit more messy than it looks, |
| 1239 | * because we close iriap and kfree(self) above. |
| 1240 | * |
| 1241 | * 2) This may include selective discovery in getsockopt. |
| 1242 | * Same stuff as above, irlmp registration and self are gone. |
| 1243 | * |
| 1244 | * Probably 1 and 2 may not matter, because it's all triggered |
| 1245 | * by a process and the socket layer already prevent the |
| 1246 | * socket to go away while a process is holding it, through |
| 1247 | * sockfd_put() and fput()... |
| 1248 | * |
| 1249 | * 3) This may include deferred TSAP closure. In particular, |
| 1250 | * we may receive a late irda_disconnect_indication() |
| 1251 | * Fortunately, (tsap_cb *)->close_pend should protect us |
| 1252 | * from that. |
| 1253 | * |
| 1254 | * I did some testing on SMP, and it looks solid. And the socket |
| 1255 | * memory leak is now gone... - Jean II |
| 1256 | */ |
| 1257 | |
| 1258 | return 0; |
| 1259 | } |
| 1260 | |
| 1261 | /* |
| 1262 | * Function irda_sendmsg (iocb, sock, msg, len) |
| 1263 | * |
| 1264 | * Send message down to TinyTP. This function is used for both STREAM and |
| 1265 | * SEQPACK services. This is possible since it forces the client to |
| 1266 | * fragment the message if necessary |
| 1267 | */ |
| 1268 | static int irda_sendmsg(struct kiocb *iocb, struct socket *sock, |
| 1269 | struct msghdr *msg, size_t len) |
| 1270 | { |
| 1271 | struct sock *sk = sock->sk; |
| 1272 | struct irda_sock *self; |
| 1273 | struct sk_buff *skb; |
| 1274 | unsigned char *asmptr; |
| 1275 | int err; |
| 1276 | |
| 1277 | IRDA_DEBUG(4, "%s(), len=%zd\n", __FUNCTION__, len); |
| 1278 | |
| 1279 | /* Note : socket.c set MSG_EOR on SEQPACKET sockets */ |
| 1280 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) |
| 1281 | return -EINVAL; |
| 1282 | |
| 1283 | if (sk->sk_shutdown & SEND_SHUTDOWN) { |
| 1284 | send_sig(SIGPIPE, current, 0); |
| 1285 | return -EPIPE; |
| 1286 | } |
| 1287 | |
| 1288 | if (sk->sk_state != TCP_ESTABLISHED) |
| 1289 | return -ENOTCONN; |
| 1290 | |
| 1291 | self = irda_sk(sk); |
| 1292 | IRDA_ASSERT(self != NULL, return -1;); |
| 1293 | |
| 1294 | /* Check if IrTTP is wants us to slow down */ |
| 1295 | |
| 1296 | if (wait_event_interruptible(*(sk->sk_sleep), |
| 1297 | (self->tx_flow != FLOW_STOP || sk->sk_state != TCP_ESTABLISHED))) |
| 1298 | return -ERESTARTSYS; |
| 1299 | |
| 1300 | /* Check if we are still connected */ |
| 1301 | if (sk->sk_state != TCP_ESTABLISHED) |
| 1302 | return -ENOTCONN; |
| 1303 | |
| 1304 | /* Check that we don't send out to big frames */ |
| 1305 | if (len > self->max_data_size) { |
| 1306 | IRDA_DEBUG(2, "%s(), Chopping frame from %zd to %d bytes!\n", |
| 1307 | __FUNCTION__, len, self->max_data_size); |
| 1308 | len = self->max_data_size; |
| 1309 | } |
| 1310 | |
| 1311 | skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16, |
| 1312 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1313 | if (!skb) |
| 1314 | return -ENOBUFS; |
| 1315 | |
| 1316 | skb_reserve(skb, self->max_header_size + 16); |
| 1317 | |
| 1318 | asmptr = skb->h.raw = skb_put(skb, len); |
| 1319 | err = memcpy_fromiovec(asmptr, msg->msg_iov, len); |
| 1320 | if (err) { |
| 1321 | kfree_skb(skb); |
| 1322 | return err; |
| 1323 | } |
| 1324 | |
| 1325 | /* |
| 1326 | * Just send the message to TinyTP, and let it deal with possible |
| 1327 | * errors. No need to duplicate all that here |
| 1328 | */ |
| 1329 | err = irttp_data_request(self->tsap, skb); |
| 1330 | if (err) { |
| 1331 | IRDA_DEBUG(0, "%s(), err=%d\n", __FUNCTION__, err); |
| 1332 | return err; |
| 1333 | } |
| 1334 | /* Tell client how much data we actually sent */ |
| 1335 | return len; |
| 1336 | } |
| 1337 | |
| 1338 | /* |
| 1339 | * Function irda_recvmsg_dgram (iocb, sock, msg, size, flags) |
| 1340 | * |
| 1341 | * Try to receive message and copy it to user. The frame is discarded |
| 1342 | * after being read, regardless of how much the user actually read |
| 1343 | */ |
| 1344 | static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock, |
| 1345 | struct msghdr *msg, size_t size, int flags) |
| 1346 | { |
| 1347 | struct sock *sk = sock->sk; |
| 1348 | struct irda_sock *self = irda_sk(sk); |
| 1349 | struct sk_buff *skb; |
| 1350 | size_t copied; |
| 1351 | int err; |
| 1352 | |
| 1353 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__); |
| 1354 | |
| 1355 | IRDA_ASSERT(self != NULL, return -1;); |
| 1356 | |
| 1357 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, |
| 1358 | flags & MSG_DONTWAIT, &err); |
| 1359 | if (!skb) |
| 1360 | return err; |
| 1361 | |
| 1362 | skb->h.raw = skb->data; |
| 1363 | copied = skb->len; |
| 1364 | |
| 1365 | if (copied > size) { |
| 1366 | IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n", |
| 1367 | __FUNCTION__, copied, size); |
| 1368 | copied = size; |
| 1369 | msg->msg_flags |= MSG_TRUNC; |
| 1370 | } |
| 1371 | skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
| 1372 | |
| 1373 | skb_free_datagram(sk, skb); |
| 1374 | |
| 1375 | /* |
| 1376 | * Check if we have previously stopped IrTTP and we know |
| 1377 | * have more free space in our rx_queue. If so tell IrTTP |
| 1378 | * to start delivering frames again before our rx_queue gets |
| 1379 | * empty |
| 1380 | */ |
| 1381 | if (self->rx_flow == FLOW_STOP) { |
| 1382 | if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) { |
| 1383 | IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __FUNCTION__); |
| 1384 | self->rx_flow = FLOW_START; |
| 1385 | irttp_flow_request(self->tsap, FLOW_START); |
| 1386 | } |
| 1387 | } |
| 1388 | |
| 1389 | return copied; |
| 1390 | } |
| 1391 | |
| 1392 | /* |
| 1393 | * Function irda_recvmsg_stream (iocb, sock, msg, size, flags) |
| 1394 | */ |
| 1395 | static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock, |
| 1396 | struct msghdr *msg, size_t size, int flags) |
| 1397 | { |
| 1398 | struct sock *sk = sock->sk; |
| 1399 | struct irda_sock *self = irda_sk(sk); |
| 1400 | int noblock = flags & MSG_DONTWAIT; |
| 1401 | size_t copied = 0; |
| 1402 | int target = 1; |
| 1403 | DECLARE_WAITQUEUE(waitq, current); |
| 1404 | |
| 1405 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); |
| 1406 | |
| 1407 | IRDA_ASSERT(self != NULL, return -1;); |
| 1408 | |
| 1409 | if (sock->flags & __SO_ACCEPTCON) |
| 1410 | return(-EINVAL); |
| 1411 | |
| 1412 | if (flags & MSG_OOB) |
| 1413 | return -EOPNOTSUPP; |
| 1414 | |
| 1415 | if (flags & MSG_WAITALL) |
| 1416 | target = size; |
| 1417 | |
| 1418 | msg->msg_namelen = 0; |
| 1419 | |
| 1420 | do { |
| 1421 | int chunk; |
| 1422 | struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue); |
| 1423 | |
| 1424 | if (skb==NULL) { |
| 1425 | int ret = 0; |
| 1426 | |
| 1427 | if (copied >= target) |
| 1428 | break; |
| 1429 | |
| 1430 | /* The following code is a cut'n'paste of the |
| 1431 | * wait_event_interruptible() macro. |
| 1432 | * We don't us the macro because the test condition |
| 1433 | * is messy. - Jean II */ |
| 1434 | set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); |
| 1435 | add_wait_queue(sk->sk_sleep, &waitq); |
| 1436 | set_current_state(TASK_INTERRUPTIBLE); |
| 1437 | |
| 1438 | /* |
| 1439 | * POSIX 1003.1g mandates this order. |
| 1440 | */ |
| 1441 | if (sk->sk_err) |
| 1442 | ret = sock_error(sk); |
| 1443 | else if (sk->sk_shutdown & RCV_SHUTDOWN) |
| 1444 | ; |
| 1445 | else if (noblock) |
| 1446 | ret = -EAGAIN; |
| 1447 | else if (signal_pending(current)) |
| 1448 | ret = -ERESTARTSYS; |
| 1449 | else if (skb_peek(&sk->sk_receive_queue) == NULL) |
| 1450 | /* Wait process until data arrives */ |
| 1451 | schedule(); |
| 1452 | |
| 1453 | current->state = TASK_RUNNING; |
| 1454 | remove_wait_queue(sk->sk_sleep, &waitq); |
| 1455 | clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); |
| 1456 | |
| 1457 | if(ret) |
| 1458 | return(ret); |
| 1459 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
| 1460 | break; |
| 1461 | |
| 1462 | continue; |
| 1463 | } |
| 1464 | |
| 1465 | chunk = min_t(unsigned int, skb->len, size); |
| 1466 | if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) { |
| 1467 | skb_queue_head(&sk->sk_receive_queue, skb); |
| 1468 | if (copied == 0) |
| 1469 | copied = -EFAULT; |
| 1470 | break; |
| 1471 | } |
| 1472 | copied += chunk; |
| 1473 | size -= chunk; |
| 1474 | |
| 1475 | /* Mark read part of skb as used */ |
| 1476 | if (!(flags & MSG_PEEK)) { |
| 1477 | skb_pull(skb, chunk); |
| 1478 | |
| 1479 | /* put the skb back if we didn't use it up.. */ |
| 1480 | if (skb->len) { |
| 1481 | IRDA_DEBUG(1, "%s(), back on q!\n", |
| 1482 | __FUNCTION__); |
| 1483 | skb_queue_head(&sk->sk_receive_queue, skb); |
| 1484 | break; |
| 1485 | } |
| 1486 | |
| 1487 | kfree_skb(skb); |
| 1488 | } else { |
| 1489 | IRDA_DEBUG(0, "%s() questionable!?\n", __FUNCTION__); |
| 1490 | |
| 1491 | /* put message back and return */ |
| 1492 | skb_queue_head(&sk->sk_receive_queue, skb); |
| 1493 | break; |
| 1494 | } |
| 1495 | } while (size); |
| 1496 | |
| 1497 | /* |
| 1498 | * Check if we have previously stopped IrTTP and we know |
| 1499 | * have more free space in our rx_queue. If so tell IrTTP |
| 1500 | * to start delivering frames again before our rx_queue gets |
| 1501 | * empty |
| 1502 | */ |
| 1503 | if (self->rx_flow == FLOW_STOP) { |
| 1504 | if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) { |
| 1505 | IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __FUNCTION__); |
| 1506 | self->rx_flow = FLOW_START; |
| 1507 | irttp_flow_request(self->tsap, FLOW_START); |
| 1508 | } |
| 1509 | } |
| 1510 | |
| 1511 | return copied; |
| 1512 | } |
| 1513 | |
| 1514 | /* |
| 1515 | * Function irda_sendmsg_dgram (iocb, sock, msg, len) |
| 1516 | * |
| 1517 | * Send message down to TinyTP for the unreliable sequenced |
| 1518 | * packet service... |
| 1519 | * |
| 1520 | */ |
| 1521 | static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock, |
| 1522 | struct msghdr *msg, size_t len) |
| 1523 | { |
| 1524 | struct sock *sk = sock->sk; |
| 1525 | struct irda_sock *self; |
| 1526 | struct sk_buff *skb; |
| 1527 | unsigned char *asmptr; |
| 1528 | int err; |
| 1529 | |
| 1530 | IRDA_DEBUG(4, "%s(), len=%zd\n", __FUNCTION__, len); |
| 1531 | |
| 1532 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT)) |
| 1533 | return -EINVAL; |
| 1534 | |
| 1535 | if (sk->sk_shutdown & SEND_SHUTDOWN) { |
| 1536 | send_sig(SIGPIPE, current, 0); |
| 1537 | return -EPIPE; |
| 1538 | } |
| 1539 | |
| 1540 | if (sk->sk_state != TCP_ESTABLISHED) |
| 1541 | return -ENOTCONN; |
| 1542 | |
| 1543 | self = irda_sk(sk); |
| 1544 | IRDA_ASSERT(self != NULL, return -1;); |
| 1545 | |
| 1546 | /* |
| 1547 | * Check that we don't send out to big frames. This is an unreliable |
| 1548 | * service, so we have no fragmentation and no coalescence |
| 1549 | */ |
| 1550 | if (len > self->max_data_size) { |
| 1551 | IRDA_DEBUG(0, "%s(), Warning to much data! " |
| 1552 | "Chopping frame from %zd to %d bytes!\n", |
| 1553 | __FUNCTION__, len, self->max_data_size); |
| 1554 | len = self->max_data_size; |
| 1555 | } |
| 1556 | |
| 1557 | skb = sock_alloc_send_skb(sk, len + self->max_header_size, |
| 1558 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1559 | if (!skb) |
| 1560 | return -ENOBUFS; |
| 1561 | |
| 1562 | skb_reserve(skb, self->max_header_size); |
| 1563 | |
| 1564 | IRDA_DEBUG(4, "%s(), appending user data\n", __FUNCTION__); |
| 1565 | asmptr = skb->h.raw = skb_put(skb, len); |
| 1566 | err = memcpy_fromiovec(asmptr, msg->msg_iov, len); |
| 1567 | if (err) { |
| 1568 | kfree_skb(skb); |
| 1569 | return err; |
| 1570 | } |
| 1571 | |
| 1572 | /* |
| 1573 | * Just send the message to TinyTP, and let it deal with possible |
| 1574 | * errors. No need to duplicate all that here |
| 1575 | */ |
| 1576 | err = irttp_udata_request(self->tsap, skb); |
| 1577 | if (err) { |
| 1578 | IRDA_DEBUG(0, "%s(), err=%d\n", __FUNCTION__, err); |
| 1579 | return err; |
| 1580 | } |
| 1581 | return len; |
| 1582 | } |
| 1583 | |
| 1584 | /* |
| 1585 | * Function irda_sendmsg_ultra (iocb, sock, msg, len) |
| 1586 | * |
| 1587 | * Send message down to IrLMP for the unreliable Ultra |
| 1588 | * packet service... |
| 1589 | */ |
| 1590 | #ifdef CONFIG_IRDA_ULTRA |
| 1591 | static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock, |
| 1592 | struct msghdr *msg, size_t len) |
| 1593 | { |
| 1594 | struct sock *sk = sock->sk; |
| 1595 | struct irda_sock *self; |
| 1596 | __u8 pid = 0; |
| 1597 | int bound = 0; |
| 1598 | struct sk_buff *skb; |
| 1599 | unsigned char *asmptr; |
| 1600 | int err; |
| 1601 | |
| 1602 | IRDA_DEBUG(4, "%s(), len=%zd\n", __FUNCTION__, len); |
| 1603 | |
| 1604 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT)) |
| 1605 | return -EINVAL; |
| 1606 | |
| 1607 | if (sk->sk_shutdown & SEND_SHUTDOWN) { |
| 1608 | send_sig(SIGPIPE, current, 0); |
| 1609 | return -EPIPE; |
| 1610 | } |
| 1611 | |
| 1612 | self = irda_sk(sk); |
| 1613 | IRDA_ASSERT(self != NULL, return -1;); |
| 1614 | |
| 1615 | /* Check if an address was specified with sendto. Jean II */ |
| 1616 | if (msg->msg_name) { |
| 1617 | struct sockaddr_irda *addr = (struct sockaddr_irda *) msg->msg_name; |
| 1618 | /* Check address, extract pid. Jean II */ |
| 1619 | if (msg->msg_namelen < sizeof(*addr)) |
| 1620 | return -EINVAL; |
| 1621 | if (addr->sir_family != AF_IRDA) |
| 1622 | return -EINVAL; |
| 1623 | |
| 1624 | pid = addr->sir_lsap_sel; |
| 1625 | if (pid & 0x80) { |
| 1626 | IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __FUNCTION__); |
| 1627 | return -EOPNOTSUPP; |
| 1628 | } |
| 1629 | } else { |
| 1630 | /* Check that the socket is properly bound to an Ultra |
| 1631 | * port. Jean II */ |
| 1632 | if ((self->lsap == NULL) || |
| 1633 | (sk->sk_state != TCP_ESTABLISHED)) { |
| 1634 | IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n", |
| 1635 | __FUNCTION__); |
| 1636 | return -ENOTCONN; |
| 1637 | } |
| 1638 | /* Use PID from socket */ |
| 1639 | bound = 1; |
| 1640 | } |
| 1641 | |
| 1642 | /* |
| 1643 | * Check that we don't send out to big frames. This is an unreliable |
| 1644 | * service, so we have no fragmentation and no coalescence |
| 1645 | */ |
| 1646 | if (len > self->max_data_size) { |
| 1647 | IRDA_DEBUG(0, "%s(), Warning to much data! " |
| 1648 | "Chopping frame from %zd to %d bytes!\n", |
| 1649 | __FUNCTION__, len, self->max_data_size); |
| 1650 | len = self->max_data_size; |
| 1651 | } |
| 1652 | |
| 1653 | skb = sock_alloc_send_skb(sk, len + self->max_header_size, |
| 1654 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1655 | if (!skb) |
| 1656 | return -ENOBUFS; |
| 1657 | |
| 1658 | skb_reserve(skb, self->max_header_size); |
| 1659 | |
| 1660 | IRDA_DEBUG(4, "%s(), appending user data\n", __FUNCTION__); |
| 1661 | asmptr = skb->h.raw = skb_put(skb, len); |
| 1662 | err = memcpy_fromiovec(asmptr, msg->msg_iov, len); |
| 1663 | if (err) { |
| 1664 | kfree_skb(skb); |
| 1665 | return err; |
| 1666 | } |
| 1667 | |
| 1668 | err = irlmp_connless_data_request((bound ? self->lsap : NULL), |
| 1669 | skb, pid); |
| 1670 | if (err) { |
| 1671 | IRDA_DEBUG(0, "%s(), err=%d\n", __FUNCTION__, err); |
| 1672 | return err; |
| 1673 | } |
| 1674 | return len; |
| 1675 | } |
| 1676 | #endif /* CONFIG_IRDA_ULTRA */ |
| 1677 | |
| 1678 | /* |
| 1679 | * Function irda_shutdown (sk, how) |
| 1680 | */ |
| 1681 | static int irda_shutdown(struct socket *sock, int how) |
| 1682 | { |
| 1683 | struct sock *sk = sock->sk; |
| 1684 | struct irda_sock *self = irda_sk(sk); |
| 1685 | |
| 1686 | IRDA_ASSERT(self != NULL, return -1;); |
| 1687 | |
| 1688 | IRDA_DEBUG(1, "%s(%p)\n", __FUNCTION__, self); |
| 1689 | |
| 1690 | sk->sk_state = TCP_CLOSE; |
| 1691 | sk->sk_shutdown |= SEND_SHUTDOWN; |
| 1692 | sk->sk_state_change(sk); |
| 1693 | |
| 1694 | if (self->iriap) { |
| 1695 | iriap_close(self->iriap); |
| 1696 | self->iriap = NULL; |
| 1697 | } |
| 1698 | |
| 1699 | if (self->tsap) { |
| 1700 | irttp_disconnect_request(self->tsap, NULL, P_NORMAL); |
| 1701 | irttp_close_tsap(self->tsap); |
| 1702 | self->tsap = NULL; |
| 1703 | } |
| 1704 | |
| 1705 | /* A few cleanup so the socket look as good as new... */ |
| 1706 | self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */ |
| 1707 | self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */ |
| 1708 | self->saddr = 0x0; /* so IrLMP assign us any link */ |
| 1709 | |
| 1710 | return 0; |
| 1711 | } |
| 1712 | |
| 1713 | /* |
| 1714 | * Function irda_poll (file, sock, wait) |
| 1715 | */ |
| 1716 | static unsigned int irda_poll(struct file * file, struct socket *sock, |
| 1717 | poll_table *wait) |
| 1718 | { |
| 1719 | struct sock *sk = sock->sk; |
| 1720 | struct irda_sock *self = irda_sk(sk); |
| 1721 | unsigned int mask; |
| 1722 | |
| 1723 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__); |
| 1724 | |
| 1725 | poll_wait(file, sk->sk_sleep, wait); |
| 1726 | mask = 0; |
| 1727 | |
| 1728 | /* Exceptional events? */ |
| 1729 | if (sk->sk_err) |
| 1730 | mask |= POLLERR; |
| 1731 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
| 1732 | IRDA_DEBUG(0, "%s(), POLLHUP\n", __FUNCTION__); |
| 1733 | mask |= POLLHUP; |
| 1734 | } |
| 1735 | |
| 1736 | /* Readable? */ |
| 1737 | if (!skb_queue_empty(&sk->sk_receive_queue)) { |
| 1738 | IRDA_DEBUG(4, "Socket is readable\n"); |
| 1739 | mask |= POLLIN | POLLRDNORM; |
| 1740 | } |
| 1741 | |
| 1742 | /* Connection-based need to check for termination and startup */ |
| 1743 | switch (sk->sk_type) { |
| 1744 | case SOCK_STREAM: |
| 1745 | if (sk->sk_state == TCP_CLOSE) { |
| 1746 | IRDA_DEBUG(0, "%s(), POLLHUP\n", __FUNCTION__); |
| 1747 | mask |= POLLHUP; |
| 1748 | } |
| 1749 | |
| 1750 | if (sk->sk_state == TCP_ESTABLISHED) { |
| 1751 | if ((self->tx_flow == FLOW_START) && |
| 1752 | sock_writeable(sk)) |
| 1753 | { |
| 1754 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; |
| 1755 | } |
| 1756 | } |
| 1757 | break; |
| 1758 | case SOCK_SEQPACKET: |
| 1759 | if ((self->tx_flow == FLOW_START) && |
| 1760 | sock_writeable(sk)) |
| 1761 | { |
| 1762 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; |
| 1763 | } |
| 1764 | break; |
| 1765 | case SOCK_DGRAM: |
| 1766 | if (sock_writeable(sk)) |
| 1767 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; |
| 1768 | break; |
| 1769 | default: |
| 1770 | break; |
| 1771 | } |
| 1772 | return mask; |
| 1773 | } |
| 1774 | |
| 1775 | /* |
| 1776 | * Function irda_ioctl (sock, cmd, arg) |
| 1777 | */ |
| 1778 | static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| 1779 | { |
| 1780 | struct sock *sk = sock->sk; |
| 1781 | |
| 1782 | IRDA_DEBUG(4, "%s(), cmd=%#x\n", __FUNCTION__, cmd); |
| 1783 | |
| 1784 | switch (cmd) { |
| 1785 | case TIOCOUTQ: { |
| 1786 | long amount; |
| 1787 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); |
| 1788 | if (amount < 0) |
| 1789 | amount = 0; |
| 1790 | if (put_user(amount, (unsigned int __user *)arg)) |
| 1791 | return -EFAULT; |
| 1792 | return 0; |
| 1793 | } |
| 1794 | |
| 1795 | case TIOCINQ: { |
| 1796 | struct sk_buff *skb; |
| 1797 | long amount = 0L; |
| 1798 | /* These two are safe on a single CPU system as only user tasks fiddle here */ |
| 1799 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) |
| 1800 | amount = skb->len; |
| 1801 | if (put_user(amount, (unsigned int __user *)arg)) |
| 1802 | return -EFAULT; |
| 1803 | return 0; |
| 1804 | } |
| 1805 | |
| 1806 | case SIOCGSTAMP: |
| 1807 | if (sk != NULL) |
| 1808 | return sock_get_timestamp(sk, (struct timeval __user *)arg); |
| 1809 | return -EINVAL; |
| 1810 | |
| 1811 | case SIOCGIFADDR: |
| 1812 | case SIOCSIFADDR: |
| 1813 | case SIOCGIFDSTADDR: |
| 1814 | case SIOCSIFDSTADDR: |
| 1815 | case SIOCGIFBRDADDR: |
| 1816 | case SIOCSIFBRDADDR: |
| 1817 | case SIOCGIFNETMASK: |
| 1818 | case SIOCSIFNETMASK: |
| 1819 | case SIOCGIFMETRIC: |
| 1820 | case SIOCSIFMETRIC: |
| 1821 | return -EINVAL; |
| 1822 | default: |
| 1823 | IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __FUNCTION__); |
| 1824 | return dev_ioctl(cmd, (void __user *) arg); |
| 1825 | } |
| 1826 | |
| 1827 | /*NOTREACHED*/ |
| 1828 | return 0; |
| 1829 | } |
| 1830 | |
| 1831 | /* |
| 1832 | * Function irda_setsockopt (sock, level, optname, optval, optlen) |
| 1833 | * |
| 1834 | * Set some options for the socket |
| 1835 | * |
| 1836 | */ |
| 1837 | static int irda_setsockopt(struct socket *sock, int level, int optname, |
| 1838 | char __user *optval, int optlen) |
| 1839 | { |
| 1840 | struct sock *sk = sock->sk; |
| 1841 | struct irda_sock *self = irda_sk(sk); |
| 1842 | struct irda_ias_set *ias_opt; |
| 1843 | struct ias_object *ias_obj; |
| 1844 | struct ias_attrib * ias_attr; /* Attribute in IAS object */ |
| 1845 | int opt; |
| 1846 | |
| 1847 | IRDA_ASSERT(self != NULL, return -1;); |
| 1848 | |
| 1849 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); |
| 1850 | |
| 1851 | if (level != SOL_IRLMP) |
| 1852 | return -ENOPROTOOPT; |
| 1853 | |
| 1854 | switch (optname) { |
| 1855 | case IRLMP_IAS_SET: |
| 1856 | /* The user want to add an attribute to an existing IAS object |
| 1857 | * (in the IAS database) or to create a new object with this |
| 1858 | * attribute. |
| 1859 | * We first query IAS to know if the object exist, and then |
| 1860 | * create the right attribute... |
| 1861 | */ |
| 1862 | |
| 1863 | if (optlen != sizeof(struct irda_ias_set)) |
| 1864 | return -EINVAL; |
| 1865 | |
| 1866 | ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC); |
| 1867 | if (ias_opt == NULL) |
| 1868 | return -ENOMEM; |
| 1869 | |
| 1870 | /* Copy query to the driver. */ |
| 1871 | if (copy_from_user(ias_opt, optval, optlen)) { |
| 1872 | kfree(ias_opt); |
| 1873 | return -EFAULT; |
| 1874 | } |
| 1875 | |
| 1876 | /* Find the object we target. |
| 1877 | * If the user gives us an empty string, we use the object |
| 1878 | * associated with this socket. This will workaround |
| 1879 | * duplicated class name - Jean II */ |
| 1880 | if(ias_opt->irda_class_name[0] == '\0') { |
| 1881 | if(self->ias_obj == NULL) { |
| 1882 | kfree(ias_opt); |
| 1883 | return -EINVAL; |
| 1884 | } |
| 1885 | ias_obj = self->ias_obj; |
| 1886 | } else |
| 1887 | ias_obj = irias_find_object(ias_opt->irda_class_name); |
| 1888 | |
| 1889 | /* Only ROOT can mess with the global IAS database. |
| 1890 | * Users can only add attributes to the object associated |
| 1891 | * with the socket they own - Jean II */ |
| 1892 | if((!capable(CAP_NET_ADMIN)) && |
| 1893 | ((ias_obj == NULL) || (ias_obj != self->ias_obj))) { |
| 1894 | kfree(ias_opt); |
| 1895 | return -EPERM; |
| 1896 | } |
| 1897 | |
| 1898 | /* If the object doesn't exist, create it */ |
| 1899 | if(ias_obj == (struct ias_object *) NULL) { |
| 1900 | /* Create a new object */ |
| 1901 | ias_obj = irias_new_object(ias_opt->irda_class_name, |
| 1902 | jiffies); |
| 1903 | } |
| 1904 | |
| 1905 | /* Do we have the attribute already ? */ |
| 1906 | if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) { |
| 1907 | kfree(ias_opt); |
| 1908 | return -EINVAL; |
| 1909 | } |
| 1910 | |
| 1911 | /* Look at the type */ |
| 1912 | switch(ias_opt->irda_attrib_type) { |
| 1913 | case IAS_INTEGER: |
| 1914 | /* Add an integer attribute */ |
| 1915 | irias_add_integer_attrib( |
| 1916 | ias_obj, |
| 1917 | ias_opt->irda_attrib_name, |
| 1918 | ias_opt->attribute.irda_attrib_int, |
| 1919 | IAS_USER_ATTR); |
| 1920 | break; |
| 1921 | case IAS_OCT_SEQ: |
| 1922 | /* Check length */ |
| 1923 | if(ias_opt->attribute.irda_attrib_octet_seq.len > |
| 1924 | IAS_MAX_OCTET_STRING) { |
| 1925 | kfree(ias_opt); |
| 1926 | return -EINVAL; |
| 1927 | } |
| 1928 | /* Add an octet sequence attribute */ |
| 1929 | irias_add_octseq_attrib( |
| 1930 | ias_obj, |
| 1931 | ias_opt->irda_attrib_name, |
| 1932 | ias_opt->attribute.irda_attrib_octet_seq.octet_seq, |
| 1933 | ias_opt->attribute.irda_attrib_octet_seq.len, |
| 1934 | IAS_USER_ATTR); |
| 1935 | break; |
| 1936 | case IAS_STRING: |
| 1937 | /* Should check charset & co */ |
| 1938 | /* Check length */ |
| 1939 | /* The length is encoded in a __u8, and |
| 1940 | * IAS_MAX_STRING == 256, so there is no way |
| 1941 | * userspace can pass us a string too large. |
| 1942 | * Jean II */ |
| 1943 | /* NULL terminate the string (avoid troubles) */ |
| 1944 | ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0'; |
| 1945 | /* Add a string attribute */ |
| 1946 | irias_add_string_attrib( |
| 1947 | ias_obj, |
| 1948 | ias_opt->irda_attrib_name, |
| 1949 | ias_opt->attribute.irda_attrib_string.string, |
| 1950 | IAS_USER_ATTR); |
| 1951 | break; |
| 1952 | default : |
| 1953 | kfree(ias_opt); |
| 1954 | return -EINVAL; |
| 1955 | } |
| 1956 | irias_insert_object(ias_obj); |
| 1957 | kfree(ias_opt); |
| 1958 | break; |
| 1959 | case IRLMP_IAS_DEL: |
| 1960 | /* The user want to delete an object from our local IAS |
| 1961 | * database. We just need to query the IAS, check is the |
| 1962 | * object is not owned by the kernel and delete it. |
| 1963 | */ |
| 1964 | |
| 1965 | if (optlen != sizeof(struct irda_ias_set)) |
| 1966 | return -EINVAL; |
| 1967 | |
| 1968 | ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC); |
| 1969 | if (ias_opt == NULL) |
| 1970 | return -ENOMEM; |
| 1971 | |
| 1972 | /* Copy query to the driver. */ |
| 1973 | if (copy_from_user(ias_opt, optval, optlen)) { |
| 1974 | kfree(ias_opt); |
| 1975 | return -EFAULT; |
| 1976 | } |
| 1977 | |
| 1978 | /* Find the object we target. |
| 1979 | * If the user gives us an empty string, we use the object |
| 1980 | * associated with this socket. This will workaround |
| 1981 | * duplicated class name - Jean II */ |
| 1982 | if(ias_opt->irda_class_name[0] == '\0') |
| 1983 | ias_obj = self->ias_obj; |
| 1984 | else |
| 1985 | ias_obj = irias_find_object(ias_opt->irda_class_name); |
| 1986 | if(ias_obj == (struct ias_object *) NULL) { |
| 1987 | kfree(ias_opt); |
| 1988 | return -EINVAL; |
| 1989 | } |
| 1990 | |
| 1991 | /* Only ROOT can mess with the global IAS database. |
| 1992 | * Users can only del attributes from the object associated |
| 1993 | * with the socket they own - Jean II */ |
| 1994 | if((!capable(CAP_NET_ADMIN)) && |
| 1995 | ((ias_obj == NULL) || (ias_obj != self->ias_obj))) { |
| 1996 | kfree(ias_opt); |
| 1997 | return -EPERM; |
| 1998 | } |
| 1999 | |
| 2000 | /* Find the attribute (in the object) we target */ |
| 2001 | ias_attr = irias_find_attrib(ias_obj, |
| 2002 | ias_opt->irda_attrib_name); |
| 2003 | if(ias_attr == (struct ias_attrib *) NULL) { |
| 2004 | kfree(ias_opt); |
| 2005 | return -EINVAL; |
| 2006 | } |
| 2007 | |
| 2008 | /* Check is the user space own the object */ |
| 2009 | if(ias_attr->value->owner != IAS_USER_ATTR) { |
| 2010 | IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __FUNCTION__); |
| 2011 | kfree(ias_opt); |
| 2012 | return -EPERM; |
| 2013 | } |
| 2014 | |
| 2015 | /* Remove the attribute (and maybe the object) */ |
| 2016 | irias_delete_attrib(ias_obj, ias_attr, 1); |
| 2017 | kfree(ias_opt); |
| 2018 | break; |
| 2019 | case IRLMP_MAX_SDU_SIZE: |
| 2020 | if (optlen < sizeof(int)) |
| 2021 | return -EINVAL; |
| 2022 | |
| 2023 | if (get_user(opt, (int __user *)optval)) |
| 2024 | return -EFAULT; |
| 2025 | |
| 2026 | /* Only possible for a seqpacket service (TTP with SAR) */ |
| 2027 | if (sk->sk_type != SOCK_SEQPACKET) { |
| 2028 | IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n", |
| 2029 | __FUNCTION__, opt); |
| 2030 | self->max_sdu_size_rx = opt; |
| 2031 | } else { |
| 2032 | IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n", |
| 2033 | __FUNCTION__); |
| 2034 | return -ENOPROTOOPT; |
| 2035 | } |
| 2036 | break; |
| 2037 | case IRLMP_HINTS_SET: |
| 2038 | if (optlen < sizeof(int)) |
| 2039 | return -EINVAL; |
| 2040 | |
| 2041 | /* The input is really a (__u8 hints[2]), easier as an int */ |
| 2042 | if (get_user(opt, (int __user *)optval)) |
| 2043 | return -EFAULT; |
| 2044 | |
| 2045 | /* Unregister any old registration */ |
| 2046 | if (self->skey) |
| 2047 | irlmp_unregister_service(self->skey); |
| 2048 | |
| 2049 | self->skey = irlmp_register_service((__u16) opt); |
| 2050 | break; |
| 2051 | case IRLMP_HINT_MASK_SET: |
| 2052 | /* As opposed to the previous case which set the hint bits |
| 2053 | * that we advertise, this one set the filter we use when |
| 2054 | * making a discovery (nodes which don't match any hint |
| 2055 | * bit in the mask are not reported). |
| 2056 | */ |
| 2057 | if (optlen < sizeof(int)) |
| 2058 | return -EINVAL; |
| 2059 | |
| 2060 | /* The input is really a (__u8 hints[2]), easier as an int */ |
| 2061 | if (get_user(opt, (int __user *)optval)) |
| 2062 | return -EFAULT; |
| 2063 | |
| 2064 | /* Set the new hint mask */ |
| 2065 | self->mask.word = (__u16) opt; |
| 2066 | /* Mask out extension bits */ |
| 2067 | self->mask.word &= 0x7f7f; |
| 2068 | /* Check if no bits */ |
| 2069 | if(!self->mask.word) |
| 2070 | self->mask.word = 0xFFFF; |
| 2071 | |
| 2072 | break; |
| 2073 | default: |
| 2074 | return -ENOPROTOOPT; |
| 2075 | } |
| 2076 | return 0; |
| 2077 | } |
| 2078 | |
| 2079 | /* |
| 2080 | * Function irda_extract_ias_value(ias_opt, ias_value) |
| 2081 | * |
| 2082 | * Translate internal IAS value structure to the user space representation |
| 2083 | * |
| 2084 | * The external representation of IAS values, as we exchange them with |
| 2085 | * user space program is quite different from the internal representation, |
| 2086 | * as stored in the IAS database (because we need a flat structure for |
| 2087 | * crossing kernel boundary). |
| 2088 | * This function transform the former in the latter. We also check |
| 2089 | * that the value type is valid. |
| 2090 | */ |
| 2091 | static int irda_extract_ias_value(struct irda_ias_set *ias_opt, |
| 2092 | struct ias_value *ias_value) |
| 2093 | { |
| 2094 | /* Look at the type */ |
| 2095 | switch (ias_value->type) { |
| 2096 | case IAS_INTEGER: |
| 2097 | /* Copy the integer */ |
| 2098 | ias_opt->attribute.irda_attrib_int = ias_value->t.integer; |
| 2099 | break; |
| 2100 | case IAS_OCT_SEQ: |
| 2101 | /* Set length */ |
| 2102 | ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len; |
| 2103 | /* Copy over */ |
| 2104 | memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq, |
| 2105 | ias_value->t.oct_seq, ias_value->len); |
| 2106 | break; |
| 2107 | case IAS_STRING: |
| 2108 | /* Set length */ |
| 2109 | ias_opt->attribute.irda_attrib_string.len = ias_value->len; |
| 2110 | ias_opt->attribute.irda_attrib_string.charset = ias_value->charset; |
| 2111 | /* Copy over */ |
| 2112 | memcpy(ias_opt->attribute.irda_attrib_string.string, |
| 2113 | ias_value->t.string, ias_value->len); |
| 2114 | /* NULL terminate the string (avoid troubles) */ |
| 2115 | ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0'; |
| 2116 | break; |
| 2117 | case IAS_MISSING: |
| 2118 | default : |
| 2119 | return -EINVAL; |
| 2120 | } |
| 2121 | |
| 2122 | /* Copy type over */ |
| 2123 | ias_opt->irda_attrib_type = ias_value->type; |
| 2124 | |
| 2125 | return 0; |
| 2126 | } |
| 2127 | |
| 2128 | /* |
| 2129 | * Function irda_getsockopt (sock, level, optname, optval, optlen) |
| 2130 | */ |
| 2131 | static int irda_getsockopt(struct socket *sock, int level, int optname, |
| 2132 | char __user *optval, int __user *optlen) |
| 2133 | { |
| 2134 | struct sock *sk = sock->sk; |
| 2135 | struct irda_sock *self = irda_sk(sk); |
| 2136 | struct irda_device_list list; |
| 2137 | struct irda_device_info *discoveries; |
| 2138 | struct irda_ias_set * ias_opt; /* IAS get/query params */ |
| 2139 | struct ias_object * ias_obj; /* Object in IAS */ |
| 2140 | struct ias_attrib * ias_attr; /* Attribute in IAS object */ |
| 2141 | int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */ |
| 2142 | int val = 0; |
| 2143 | int len = 0; |
| 2144 | int err; |
| 2145 | int offset, total; |
| 2146 | |
| 2147 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); |
| 2148 | |
| 2149 | if (level != SOL_IRLMP) |
| 2150 | return -ENOPROTOOPT; |
| 2151 | |
| 2152 | if (get_user(len, optlen)) |
| 2153 | return -EFAULT; |
| 2154 | |
| 2155 | if(len < 0) |
| 2156 | return -EINVAL; |
| 2157 | |
| 2158 | switch (optname) { |
| 2159 | case IRLMP_ENUMDEVICES: |
| 2160 | /* Ask lmp for the current discovery log */ |
| 2161 | discoveries = irlmp_get_discoveries(&list.len, self->mask.word, |
| 2162 | self->nslots); |
| 2163 | /* Check if the we got some results */ |
| 2164 | if (discoveries == NULL) |
| 2165 | return -EAGAIN; /* Didn't find any devices */ |
| 2166 | err = 0; |
| 2167 | |
| 2168 | /* Write total list length back to client */ |
| 2169 | if (copy_to_user(optval, &list, |
| 2170 | sizeof(struct irda_device_list) - |
| 2171 | sizeof(struct irda_device_info))) |
| 2172 | err = -EFAULT; |
| 2173 | |
| 2174 | /* Offset to first device entry */ |
| 2175 | offset = sizeof(struct irda_device_list) - |
| 2176 | sizeof(struct irda_device_info); |
| 2177 | |
| 2178 | /* Copy the list itself - watch for overflow */ |
| 2179 | if(list.len > 2048) |
| 2180 | { |
| 2181 | err = -EINVAL; |
| 2182 | goto bed; |
| 2183 | } |
| 2184 | total = offset + (list.len * sizeof(struct irda_device_info)); |
| 2185 | if (total > len) |
| 2186 | total = len; |
| 2187 | if (copy_to_user(optval+offset, discoveries, total - offset)) |
| 2188 | err = -EFAULT; |
| 2189 | |
| 2190 | /* Write total number of bytes used back to client */ |
| 2191 | if (put_user(total, optlen)) |
| 2192 | err = -EFAULT; |
| 2193 | bed: |
| 2194 | /* Free up our buffer */ |
| 2195 | kfree(discoveries); |
| 2196 | if (err) |
| 2197 | return err; |
| 2198 | break; |
| 2199 | case IRLMP_MAX_SDU_SIZE: |
| 2200 | val = self->max_data_size; |
| 2201 | len = sizeof(int); |
| 2202 | if (put_user(len, optlen)) |
| 2203 | return -EFAULT; |
| 2204 | |
| 2205 | if (copy_to_user(optval, &val, len)) |
| 2206 | return -EFAULT; |
| 2207 | break; |
| 2208 | case IRLMP_IAS_GET: |
| 2209 | /* The user want an object from our local IAS database. |
| 2210 | * We just need to query the IAS and return the value |
| 2211 | * that we found */ |
| 2212 | |
| 2213 | /* Check that the user has allocated the right space for us */ |
| 2214 | if (len != sizeof(struct irda_ias_set)) |
| 2215 | return -EINVAL; |
| 2216 | |
| 2217 | ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC); |
| 2218 | if (ias_opt == NULL) |
| 2219 | return -ENOMEM; |
| 2220 | |
| 2221 | /* Copy query to the driver. */ |
| 2222 | if (copy_from_user(ias_opt, optval, len)) { |
| 2223 | kfree(ias_opt); |
| 2224 | return -EFAULT; |
| 2225 | } |
| 2226 | |
| 2227 | /* Find the object we target. |
| 2228 | * If the user gives us an empty string, we use the object |
| 2229 | * associated with this socket. This will workaround |
| 2230 | * duplicated class name - Jean II */ |
| 2231 | if(ias_opt->irda_class_name[0] == '\0') |
| 2232 | ias_obj = self->ias_obj; |
| 2233 | else |
| 2234 | ias_obj = irias_find_object(ias_opt->irda_class_name); |
| 2235 | if(ias_obj == (struct ias_object *) NULL) { |
| 2236 | kfree(ias_opt); |
| 2237 | return -EINVAL; |
| 2238 | } |
| 2239 | |
| 2240 | /* Find the attribute (in the object) we target */ |
| 2241 | ias_attr = irias_find_attrib(ias_obj, |
| 2242 | ias_opt->irda_attrib_name); |
| 2243 | if(ias_attr == (struct ias_attrib *) NULL) { |
| 2244 | kfree(ias_opt); |
| 2245 | return -EINVAL; |
| 2246 | } |
| 2247 | |
| 2248 | /* Translate from internal to user structure */ |
| 2249 | err = irda_extract_ias_value(ias_opt, ias_attr->value); |
| 2250 | if(err) { |
| 2251 | kfree(ias_opt); |
| 2252 | return err; |
| 2253 | } |
| 2254 | |
| 2255 | /* Copy reply to the user */ |
| 2256 | if (copy_to_user(optval, ias_opt, |
| 2257 | sizeof(struct irda_ias_set))) { |
| 2258 | kfree(ias_opt); |
| 2259 | return -EFAULT; |
| 2260 | } |
| 2261 | /* Note : don't need to put optlen, we checked it */ |
| 2262 | kfree(ias_opt); |
| 2263 | break; |
| 2264 | case IRLMP_IAS_QUERY: |
| 2265 | /* The user want an object from a remote IAS database. |
| 2266 | * We need to use IAP to query the remote database and |
| 2267 | * then wait for the answer to come back. */ |
| 2268 | |
| 2269 | /* Check that the user has allocated the right space for us */ |
| 2270 | if (len != sizeof(struct irda_ias_set)) |
| 2271 | return -EINVAL; |
| 2272 | |
| 2273 | ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC); |
| 2274 | if (ias_opt == NULL) |
| 2275 | return -ENOMEM; |
| 2276 | |
| 2277 | /* Copy query to the driver. */ |
| 2278 | if (copy_from_user(ias_opt, optval, len)) { |
| 2279 | kfree(ias_opt); |
| 2280 | return -EFAULT; |
| 2281 | } |
| 2282 | |
| 2283 | /* At this point, there are two cases... |
| 2284 | * 1) the socket is connected - that's the easy case, we |
| 2285 | * just query the device we are connected to... |
| 2286 | * 2) the socket is not connected - the user doesn't want |
| 2287 | * to connect and/or may not have a valid service name |
| 2288 | * (so can't create a fake connection). In this case, |
| 2289 | * we assume that the user pass us a valid destination |
| 2290 | * address in the requesting structure... |
| 2291 | */ |
| 2292 | if(self->daddr != DEV_ADDR_ANY) { |
| 2293 | /* We are connected - reuse known daddr */ |
| 2294 | daddr = self->daddr; |
| 2295 | } else { |
| 2296 | /* We are not connected, we must specify a valid |
| 2297 | * destination address */ |
| 2298 | daddr = ias_opt->daddr; |
| 2299 | if((!daddr) || (daddr == DEV_ADDR_ANY)) { |
| 2300 | kfree(ias_opt); |
| 2301 | return -EINVAL; |
| 2302 | } |
| 2303 | } |
| 2304 | |
| 2305 | /* Check that we can proceed with IAP */ |
| 2306 | if (self->iriap) { |
| 2307 | IRDA_WARNING("%s: busy with a previous query\n", |
| 2308 | __FUNCTION__); |
| 2309 | kfree(ias_opt); |
| 2310 | return -EBUSY; |
| 2311 | } |
| 2312 | |
| 2313 | self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self, |
| 2314 | irda_getvalue_confirm); |
| 2315 | |
| 2316 | if (self->iriap == NULL) { |
| 2317 | kfree(ias_opt); |
| 2318 | return -ENOMEM; |
| 2319 | } |
| 2320 | |
| 2321 | /* Treat unexpected wakeup as disconnect */ |
| 2322 | self->errno = -EHOSTUNREACH; |
| 2323 | |
| 2324 | /* Query remote LM-IAS */ |
| 2325 | iriap_getvaluebyclass_request(self->iriap, |
| 2326 | self->saddr, daddr, |
| 2327 | ias_opt->irda_class_name, |
| 2328 | ias_opt->irda_attrib_name); |
| 2329 | |
| 2330 | /* Wait for answer, if not yet finished (or failed) */ |
| 2331 | if (wait_event_interruptible(self->query_wait, |
| 2332 | (self->iriap == NULL))) { |
| 2333 | /* pending request uses copy of ias_opt-content |
| 2334 | * we can free it regardless! */ |
| 2335 | kfree(ias_opt); |
| 2336 | /* Treat signals as disconnect */ |
| 2337 | return -EHOSTUNREACH; |
| 2338 | } |
| 2339 | |
| 2340 | /* Check what happened */ |
| 2341 | if (self->errno) |
| 2342 | { |
| 2343 | kfree(ias_opt); |
| 2344 | /* Requested object/attribute doesn't exist */ |
| 2345 | if((self->errno == IAS_CLASS_UNKNOWN) || |
| 2346 | (self->errno == IAS_ATTRIB_UNKNOWN)) |
| 2347 | return (-EADDRNOTAVAIL); |
| 2348 | else |
| 2349 | return (-EHOSTUNREACH); |
| 2350 | } |
| 2351 | |
| 2352 | /* Translate from internal to user structure */ |
| 2353 | err = irda_extract_ias_value(ias_opt, self->ias_result); |
| 2354 | if (self->ias_result) |
| 2355 | irias_delete_value(self->ias_result); |
| 2356 | if (err) { |
| 2357 | kfree(ias_opt); |
| 2358 | return err; |
| 2359 | } |
| 2360 | |
| 2361 | /* Copy reply to the user */ |
| 2362 | if (copy_to_user(optval, ias_opt, |
| 2363 | sizeof(struct irda_ias_set))) { |
| 2364 | kfree(ias_opt); |
| 2365 | return -EFAULT; |
| 2366 | } |
| 2367 | /* Note : don't need to put optlen, we checked it */ |
| 2368 | kfree(ias_opt); |
| 2369 | break; |
| 2370 | case IRLMP_WAITDEVICE: |
| 2371 | /* This function is just another way of seeing life ;-) |
| 2372 | * IRLMP_ENUMDEVICES assumes that you have a static network, |
| 2373 | * and that you just want to pick one of the devices present. |
| 2374 | * On the other hand, in here we assume that no device is |
| 2375 | * present and that at some point in the future a device will |
| 2376 | * come into range. When this device arrive, we just wake |
| 2377 | * up the caller, so that he has time to connect to it before |
| 2378 | * the device goes away... |
| 2379 | * Note : once the node has been discovered for more than a |
| 2380 | * few second, it won't trigger this function, unless it |
| 2381 | * goes away and come back changes its hint bits (so we |
| 2382 | * might call it IRLMP_WAITNEWDEVICE). |
| 2383 | */ |
| 2384 | |
| 2385 | /* Check that the user is passing us an int */ |
| 2386 | if (len != sizeof(int)) |
| 2387 | return -EINVAL; |
| 2388 | /* Get timeout in ms (max time we block the caller) */ |
| 2389 | if (get_user(val, (int __user *)optval)) |
| 2390 | return -EFAULT; |
| 2391 | |
| 2392 | /* Tell IrLMP we want to be notified */ |
| 2393 | irlmp_update_client(self->ckey, self->mask.word, |
| 2394 | irda_selective_discovery_indication, |
| 2395 | NULL, (void *) self); |
| 2396 | |
| 2397 | /* Do some discovery (and also return cached results) */ |
| 2398 | irlmp_discovery_request(self->nslots); |
| 2399 | |
| 2400 | /* Wait until a node is discovered */ |
| 2401 | if (!self->cachedaddr) { |
| 2402 | int ret = 0; |
| 2403 | |
| 2404 | IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __FUNCTION__); |
| 2405 | |
| 2406 | /* Set watchdog timer to expire in <val> ms. */ |
| 2407 | self->errno = 0; |
| 2408 | init_timer(&self->watchdog); |
| 2409 | self->watchdog.function = irda_discovery_timeout; |
| 2410 | self->watchdog.data = (unsigned long) self; |
| 2411 | self->watchdog.expires = jiffies + (val * HZ/1000); |
| 2412 | add_timer(&(self->watchdog)); |
| 2413 | |
| 2414 | /* Wait for IR-LMP to call us back */ |
| 2415 | __wait_event_interruptible(self->query_wait, |
| 2416 | (self->cachedaddr != 0 || self->errno == -ETIME), |
| 2417 | ret); |
| 2418 | |
| 2419 | /* If watchdog is still activated, kill it! */ |
| 2420 | if(timer_pending(&(self->watchdog))) |
| 2421 | del_timer(&(self->watchdog)); |
| 2422 | |
| 2423 | IRDA_DEBUG(1, "%s(), ...waking up !\n", __FUNCTION__); |
| 2424 | |
| 2425 | if (ret != 0) |
| 2426 | return ret; |
| 2427 | } |
| 2428 | else |
| 2429 | IRDA_DEBUG(1, "%s(), found immediately !\n", |
| 2430 | __FUNCTION__); |
| 2431 | |
| 2432 | /* Tell IrLMP that we have been notified */ |
| 2433 | irlmp_update_client(self->ckey, self->mask.word, |
| 2434 | NULL, NULL, NULL); |
| 2435 | |
| 2436 | /* Check if the we got some results */ |
| 2437 | if (!self->cachedaddr) |
| 2438 | return -EAGAIN; /* Didn't find any devices */ |
| 2439 | daddr = self->cachedaddr; |
| 2440 | /* Cleanup */ |
| 2441 | self->cachedaddr = 0; |
| 2442 | |
| 2443 | /* We return the daddr of the device that trigger the |
| 2444 | * wakeup. As irlmp pass us only the new devices, we |
| 2445 | * are sure that it's not an old device. |
| 2446 | * If the user want more details, he should query |
| 2447 | * the whole discovery log and pick one device... |
| 2448 | */ |
| 2449 | if (put_user(daddr, (int __user *)optval)) |
| 2450 | return -EFAULT; |
| 2451 | |
| 2452 | break; |
| 2453 | default: |
| 2454 | return -ENOPROTOOPT; |
| 2455 | } |
| 2456 | |
| 2457 | return 0; |
| 2458 | } |
| 2459 | |
| 2460 | static struct net_proto_family irda_family_ops = { |
| 2461 | .family = PF_IRDA, |
| 2462 | .create = irda_create, |
| 2463 | .owner = THIS_MODULE, |
| 2464 | }; |
| 2465 | |
| 2466 | static struct proto_ops SOCKOPS_WRAPPED(irda_stream_ops) = { |
| 2467 | .family = PF_IRDA, |
| 2468 | .owner = THIS_MODULE, |
| 2469 | .release = irda_release, |
| 2470 | .bind = irda_bind, |
| 2471 | .connect = irda_connect, |
| 2472 | .socketpair = sock_no_socketpair, |
| 2473 | .accept = irda_accept, |
| 2474 | .getname = irda_getname, |
| 2475 | .poll = irda_poll, |
| 2476 | .ioctl = irda_ioctl, |
| 2477 | .listen = irda_listen, |
| 2478 | .shutdown = irda_shutdown, |
| 2479 | .setsockopt = irda_setsockopt, |
| 2480 | .getsockopt = irda_getsockopt, |
| 2481 | .sendmsg = irda_sendmsg, |
| 2482 | .recvmsg = irda_recvmsg_stream, |
| 2483 | .mmap = sock_no_mmap, |
| 2484 | .sendpage = sock_no_sendpage, |
| 2485 | }; |
| 2486 | |
| 2487 | static struct proto_ops SOCKOPS_WRAPPED(irda_seqpacket_ops) = { |
| 2488 | .family = PF_IRDA, |
| 2489 | .owner = THIS_MODULE, |
| 2490 | .release = irda_release, |
| 2491 | .bind = irda_bind, |
| 2492 | .connect = irda_connect, |
| 2493 | .socketpair = sock_no_socketpair, |
| 2494 | .accept = irda_accept, |
| 2495 | .getname = irda_getname, |
| 2496 | .poll = datagram_poll, |
| 2497 | .ioctl = irda_ioctl, |
| 2498 | .listen = irda_listen, |
| 2499 | .shutdown = irda_shutdown, |
| 2500 | .setsockopt = irda_setsockopt, |
| 2501 | .getsockopt = irda_getsockopt, |
| 2502 | .sendmsg = irda_sendmsg, |
| 2503 | .recvmsg = irda_recvmsg_dgram, |
| 2504 | .mmap = sock_no_mmap, |
| 2505 | .sendpage = sock_no_sendpage, |
| 2506 | }; |
| 2507 | |
| 2508 | static struct proto_ops SOCKOPS_WRAPPED(irda_dgram_ops) = { |
| 2509 | .family = PF_IRDA, |
| 2510 | .owner = THIS_MODULE, |
| 2511 | .release = irda_release, |
| 2512 | .bind = irda_bind, |
| 2513 | .connect = irda_connect, |
| 2514 | .socketpair = sock_no_socketpair, |
| 2515 | .accept = irda_accept, |
| 2516 | .getname = irda_getname, |
| 2517 | .poll = datagram_poll, |
| 2518 | .ioctl = irda_ioctl, |
| 2519 | .listen = irda_listen, |
| 2520 | .shutdown = irda_shutdown, |
| 2521 | .setsockopt = irda_setsockopt, |
| 2522 | .getsockopt = irda_getsockopt, |
| 2523 | .sendmsg = irda_sendmsg_dgram, |
| 2524 | .recvmsg = irda_recvmsg_dgram, |
| 2525 | .mmap = sock_no_mmap, |
| 2526 | .sendpage = sock_no_sendpage, |
| 2527 | }; |
| 2528 | |
| 2529 | #ifdef CONFIG_IRDA_ULTRA |
| 2530 | static struct proto_ops SOCKOPS_WRAPPED(irda_ultra_ops) = { |
| 2531 | .family = PF_IRDA, |
| 2532 | .owner = THIS_MODULE, |
| 2533 | .release = irda_release, |
| 2534 | .bind = irda_bind, |
| 2535 | .connect = sock_no_connect, |
| 2536 | .socketpair = sock_no_socketpair, |
| 2537 | .accept = sock_no_accept, |
| 2538 | .getname = irda_getname, |
| 2539 | .poll = datagram_poll, |
| 2540 | .ioctl = irda_ioctl, |
| 2541 | .listen = sock_no_listen, |
| 2542 | .shutdown = irda_shutdown, |
| 2543 | .setsockopt = irda_setsockopt, |
| 2544 | .getsockopt = irda_getsockopt, |
| 2545 | .sendmsg = irda_sendmsg_ultra, |
| 2546 | .recvmsg = irda_recvmsg_dgram, |
| 2547 | .mmap = sock_no_mmap, |
| 2548 | .sendpage = sock_no_sendpage, |
| 2549 | }; |
| 2550 | #endif /* CONFIG_IRDA_ULTRA */ |
| 2551 | |
| 2552 | #include <linux/smp_lock.h> |
| 2553 | SOCKOPS_WRAP(irda_stream, PF_IRDA); |
| 2554 | SOCKOPS_WRAP(irda_seqpacket, PF_IRDA); |
| 2555 | SOCKOPS_WRAP(irda_dgram, PF_IRDA); |
| 2556 | #ifdef CONFIG_IRDA_ULTRA |
| 2557 | SOCKOPS_WRAP(irda_ultra, PF_IRDA); |
| 2558 | #endif /* CONFIG_IRDA_ULTRA */ |
| 2559 | |
| 2560 | /* |
| 2561 | * Function irsock_init (pro) |
| 2562 | * |
| 2563 | * Initialize IrDA protocol |
| 2564 | * |
| 2565 | */ |
| 2566 | int __init irsock_init(void) |
| 2567 | { |
| 2568 | int rc = proto_register(&irda_proto, 0); |
| 2569 | |
| 2570 | if (rc == 0) |
| 2571 | rc = sock_register(&irda_family_ops); |
| 2572 | |
| 2573 | return rc; |
| 2574 | } |
| 2575 | |
| 2576 | /* |
| 2577 | * Function irsock_cleanup (void) |
| 2578 | * |
| 2579 | * Remove IrDA protocol |
| 2580 | * |
| 2581 | */ |
| 2582 | void __exit irsock_cleanup(void) |
| 2583 | { |
| 2584 | sock_unregister(PF_IRDA); |
| 2585 | proto_unregister(&irda_proto); |
| 2586 | } |