1 /*********************************************************************
5 * Description: IrDA sockets implementation
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.
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.
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.
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.
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,
32 * Linux-IrDA now supports four different types of IrDA sockets:
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
43 ********************************************************************/
45 #include <linux/capability.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>
55 #include <asm/ioctls.h> /* TIOCOUTQ, TIOCINQ */
56 #include <asm/uaccess.h>
59 #include <net/tcp_states.h>
61 #include <net/irda/af_irda.h>
63 static int irda_create(struct socket *sock, int protocol);
65 static const struct proto_ops irda_stream_ops;
66 static const struct proto_ops irda_seqpacket_ops;
67 static const struct proto_ops irda_dgram_ops;
69 #ifdef CONFIG_IRDA_ULTRA
70 static const struct proto_ops irda_ultra_ops;
71 #define ULTRA_MAX_DATA 382
72 #endif /* CONFIG_IRDA_ULTRA */
74 #define IRDA_MAX_HEADER (TTP_MAX_HEADER)
77 * Function irda_data_indication (instance, sap, skb)
79 * Received some data from TinyTP. Just queue it on the receive queue
82 static int irda_data_indication(void *instance, void *sap, struct sk_buff *skb)
84 struct irda_sock *self;
88 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
92 IRDA_ASSERT(sk != NULL, return -1;);
94 err = sock_queue_rcv_skb(sk, skb);
96 IRDA_DEBUG(1, "%s(), error: no more mem!\n", __FUNCTION__);
97 self->rx_flow = FLOW_STOP;
99 /* When we return error, TTP will need to requeue the skb */
107 * Function irda_disconnect_indication (instance, sap, reason, skb)
109 * Connection has been closed. Check reason to find out why
112 static void irda_disconnect_indication(void *instance, void *sap,
113 LM_REASON reason, struct sk_buff *skb)
115 struct irda_sock *self;
120 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
122 /* Don't care about it, but let's not leak it */
128 IRDA_DEBUG(0, "%s(%p) : BUG : sk is NULL\n",
133 /* Prevent race conditions with irda_release() and irda_shutdown() */
135 if (!sock_flag(sk, SOCK_DEAD) && sk->sk_state != TCP_CLOSE) {
136 sk->sk_state = TCP_CLOSE;
137 sk->sk_shutdown |= SEND_SHUTDOWN;
139 sk->sk_state_change(sk);
142 * If we leave it open, IrLMP put it back into the list of
143 * unconnected LSAPs. The problem is that any incoming request
144 * can then be matched to this socket (and it will be, because
145 * it is at the head of the list). This would prevent any
146 * listening socket waiting on the same TSAP to get those
147 * requests. Some apps forget to close sockets, or hang to it
148 * a bit too long, so we may stay in this dead state long
149 * enough to be noticed...
150 * Note : all socket function do check sk->sk_state, so we are
155 irttp_close_tsap(self->tsap);
161 /* Note : once we are there, there is not much you want to do
162 * with the socket anymore, apart from closing it.
163 * For example, bind() and connect() won't reset sk->sk_err,
164 * sk->sk_shutdown and sk->sk_flags to valid values...
170 * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb)
172 * Connections has been confirmed by the remote device
175 static void irda_connect_confirm(void *instance, void *sap,
176 struct qos_info *qos,
177 __u32 max_sdu_size, __u8 max_header_size,
180 struct irda_sock *self;
185 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
194 // Should be ??? skb_queue_tail(&sk->sk_receive_queue, skb);
196 /* How much header space do we need to reserve */
197 self->max_header_size = max_header_size;
199 /* IrTTP max SDU size in transmit direction */
200 self->max_sdu_size_tx = max_sdu_size;
202 /* Find out what the largest chunk of data that we can transmit is */
203 switch (sk->sk_type) {
205 if (max_sdu_size != 0) {
206 IRDA_ERROR("%s: max_sdu_size must be 0\n",
210 self->max_data_size = irttp_get_max_seg_size(self->tsap);
213 if (max_sdu_size == 0) {
214 IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
218 self->max_data_size = max_sdu_size;
221 self->max_data_size = irttp_get_max_seg_size(self->tsap);
224 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __FUNCTION__,
225 self->max_data_size);
227 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
229 /* We are now connected! */
230 sk->sk_state = TCP_ESTABLISHED;
231 sk->sk_state_change(sk);
235 * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata)
237 * Incoming connection
240 static void irda_connect_indication(void *instance, void *sap,
241 struct qos_info *qos, __u32 max_sdu_size,
242 __u8 max_header_size, struct sk_buff *skb)
244 struct irda_sock *self;
249 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
257 /* How much header space do we need to reserve */
258 self->max_header_size = max_header_size;
260 /* IrTTP max SDU size in transmit direction */
261 self->max_sdu_size_tx = max_sdu_size;
263 /* Find out what the largest chunk of data that we can transmit is */
264 switch (sk->sk_type) {
266 if (max_sdu_size != 0) {
267 IRDA_ERROR("%s: max_sdu_size must be 0\n",
272 self->max_data_size = irttp_get_max_seg_size(self->tsap);
275 if (max_sdu_size == 0) {
276 IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
281 self->max_data_size = max_sdu_size;
284 self->max_data_size = irttp_get_max_seg_size(self->tsap);
287 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __FUNCTION__,
288 self->max_data_size);
290 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
292 skb_queue_tail(&sk->sk_receive_queue, skb);
293 sk->sk_state_change(sk);
297 * Function irda_connect_response (handle)
299 * Accept incoming connection
302 static void irda_connect_response(struct irda_sock *self)
306 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
308 IRDA_ASSERT(self != NULL, return;);
310 skb = alloc_skb(TTP_MAX_HEADER + TTP_SAR_HEADER,
313 IRDA_DEBUG(0, "%s() Unable to allocate sk_buff!\n",
318 /* Reserve space for MUX_CONTROL and LAP header */
319 skb_reserve(skb, IRDA_MAX_HEADER);
321 irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
325 * Function irda_flow_indication (instance, sap, flow)
327 * Used by TinyTP to tell us if it can accept more data or not
330 static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
332 struct irda_sock *self;
335 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
339 IRDA_ASSERT(sk != NULL, return;);
343 IRDA_DEBUG(1, "%s(), IrTTP wants us to slow down\n",
345 self->tx_flow = flow;
348 self->tx_flow = flow;
349 IRDA_DEBUG(1, "%s(), IrTTP wants us to start again\n",
351 wake_up_interruptible(sk->sk_sleep);
354 IRDA_DEBUG(0, "%s(), Unknown flow command!\n", __FUNCTION__);
355 /* Unknown flow command, better stop */
356 self->tx_flow = flow;
362 * Function irda_getvalue_confirm (obj_id, value, priv)
364 * Got answer from remote LM-IAS, just pass object to requester...
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...
369 static void irda_getvalue_confirm(int result, __u16 obj_id,
370 struct ias_value *value, void *priv)
372 struct irda_sock *self;
374 self = (struct irda_sock *) priv;
376 IRDA_WARNING("%s: lost myself!\n", __FUNCTION__);
380 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
382 /* We probably don't need to make any more queries */
383 iriap_close(self->iriap);
386 /* Check if request succeeded */
387 if (result != IAS_SUCCESS) {
388 IRDA_DEBUG(1, "%s(), IAS query failed! (%d)\n", __FUNCTION__,
391 self->errno = result; /* We really need it later */
393 /* Wake up any processes waiting for result */
394 wake_up_interruptible(&self->query_wait);
399 /* Pass the object to the caller (so the caller must delete it) */
400 self->ias_result = value;
403 /* Wake up any processes waiting for result */
404 wake_up_interruptible(&self->query_wait);
408 * Function irda_selective_discovery_indication (discovery)
410 * Got a selective discovery indication from IrLMP.
412 * IrLMP is telling us that this node is new and matching our hint bit
413 * filter. Wake up any process waiting for answer...
415 static void irda_selective_discovery_indication(discinfo_t *discovery,
419 struct irda_sock *self;
421 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
423 self = (struct irda_sock *) priv;
425 IRDA_WARNING("%s: lost myself!\n", __FUNCTION__);
429 /* Pass parameter to the caller */
430 self->cachedaddr = discovery->daddr;
432 /* Wake up process if its waiting for device to be discovered */
433 wake_up_interruptible(&self->query_wait);
437 * Function irda_discovery_timeout (priv)
439 * Timeout in the selective discovery process
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...
444 static void irda_discovery_timeout(u_long priv)
446 struct irda_sock *self;
448 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
450 self = (struct irda_sock *) priv;
451 IRDA_ASSERT(self != NULL, return;);
453 /* Nothing for the caller */
454 self->cachelog = NULL;
455 self->cachedaddr = 0;
456 self->errno = -ETIME;
458 /* Wake up process if its still waiting... */
459 wake_up_interruptible(&self->query_wait);
463 * Function irda_open_tsap (self)
465 * Open local Transport Service Access Point (TSAP)
468 static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
473 IRDA_WARNING("%s: busy!\n", __FUNCTION__);
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);
488 self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
490 if (self->tsap == NULL) {
491 IRDA_DEBUG(0, "%s(), Unable to allocate TSAP!\n",
495 /* Remember which TSAP selector we actually got */
496 self->stsap_sel = self->tsap->stsap_sel;
502 * Function irda_open_lsap (self)
504 * Open local Link Service Access Point (LSAP). Used for opening Ultra
507 #ifdef CONFIG_IRDA_ULTRA
508 static int irda_open_lsap(struct irda_sock *self, int pid)
513 IRDA_WARNING("%s(), busy!\n", __FUNCTION__);
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);
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__);
531 #endif /* CONFIG_IRDA_ULTRA */
534 * Function irda_find_lsap_sel (self, name)
536 * Try to lookup LSAP selector in remote LM-IAS
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...
544 static int irda_find_lsap_sel(struct irda_sock *self, char *name)
546 IRDA_DEBUG(2, "%s(%p, %s)\n", __FUNCTION__, self, name);
548 IRDA_ASSERT(self != NULL, return -1;);
551 IRDA_WARNING("%s(): busy with a previous query\n",
556 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
557 irda_getvalue_confirm);
558 if(self->iriap == NULL)
561 /* Treat unexpected wakeup as disconnect */
562 self->errno = -EHOSTUNREACH;
564 /* Query remote LM-IAS */
565 iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
566 name, "IrDA:TinyTP:LsapSel");
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;
573 /* Check what happened */
576 /* Requested object/attribute doesn't exist */
577 if((self->errno == IAS_CLASS_UNKNOWN) ||
578 (self->errno == IAS_ATTRIB_UNKNOWN))
579 return (-EADDRNOTAVAIL);
581 return (-EHOSTUNREACH);
584 /* Get the remote TSAP selector */
585 switch (self->ias_result->type) {
587 IRDA_DEBUG(4, "%s() int=%d\n",
588 __FUNCTION__, self->ias_result->t.integer);
590 if (self->ias_result->t.integer != -1)
591 self->dtsap_sel = self->ias_result->t.integer;
597 IRDA_DEBUG(0, "%s(), bad type!\n", __FUNCTION__);
600 if (self->ias_result)
601 irias_delete_value(self->ias_result);
606 return -EADDRNOTAVAIL;
610 * Function irda_discover_daddr_and_lsap_sel (self, name)
612 * This try to find a device with the requested service.
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.
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...
626 static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
628 discinfo_t *discoveries; /* Copy of the discovery log */
629 int number; /* Number of nodes in the log */
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 */
635 IRDA_DEBUG(2, "%s(), name=%s\n", __FUNCTION__, name);
637 IRDA_ASSERT(self != NULL, return -1;);
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,
645 /* Check if the we got some results */
646 if (discoveries == NULL)
647 return -ENETUNREACH; /* No nodes discovered */
650 * Now, check all discovered devices (if any), and connect
651 * client only about the services that the client is
654 for(i = 0; i < number; i++) {
655 /* Try the address in the log */
656 self->daddr = discoveries[i].daddr;
658 IRDA_DEBUG(1, "%s(), trying daddr = %08x\n",
659 __FUNCTION__, self->daddr);
661 /* Query remote LM-IAS for this service */
662 err = irda_find_lsap_sel(self, name);
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",
669 self->daddr = DEV_ADDR_ANY;
673 /* First time we found that one, save it ! */
675 dtsap_sel = self->dtsap_sel;
678 /* Requested service simply doesn't exist on this node */
681 /* Something bad did happen :-( */
682 IRDA_DEBUG(0, "%s(), unexpected IAS query failure\n", __FUNCTION__);
683 self->daddr = DEV_ADDR_ANY;
685 return(-EHOSTUNREACH);
689 /* Cleanup our copy of the discovery log */
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",
696 self->daddr = DEV_ADDR_ANY;
697 return(-EADDRNOTAVAIL);
700 /* Revert back to discovered device & service */
703 self->dtsap_sel = dtsap_sel;
705 IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n",
706 __FUNCTION__, name, self->daddr);
712 * Function irda_getname (sock, uaddr, uaddr_len, peer)
714 * Return the our own, or peers socket address (sockaddr_irda)
717 static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
718 int *uaddr_len, int peer)
720 struct sockaddr_irda saddr;
721 struct sock *sk = sock->sk;
722 struct irda_sock *self = irda_sk(sk);
725 if (sk->sk_state != TCP_ESTABLISHED)
728 saddr.sir_family = AF_IRDA;
729 saddr.sir_lsap_sel = self->dtsap_sel;
730 saddr.sir_addr = self->daddr;
732 saddr.sir_family = AF_IRDA;
733 saddr.sir_lsap_sel = self->stsap_sel;
734 saddr.sir_addr = self->saddr;
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);
740 /* uaddr_len come to us uninitialised */
741 *uaddr_len = sizeof (struct sockaddr_irda);
742 memcpy(uaddr, &saddr, *uaddr_len);
748 * Function irda_listen (sock, backlog)
750 * Just move to the listen state
753 static int irda_listen(struct socket *sock, int backlog)
755 struct sock *sk = sock->sk;
757 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
759 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
760 (sk->sk_type != SOCK_DGRAM))
763 if (sk->sk_state != TCP_LISTEN) {
764 sk->sk_max_ack_backlog = backlog;
765 sk->sk_state = TCP_LISTEN;
774 * Function irda_bind (sock, uaddr, addr_len)
776 * Used by servers to register their well known TSAP
779 static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
781 struct sock *sk = sock->sk;
782 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
783 struct irda_sock *self = irda_sk(sk);
786 IRDA_ASSERT(self != NULL, return -1;);
788 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
790 if (addr_len != sizeof(struct sockaddr_irda))
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__);
802 err = irda_open_lsap(self, self->pid);
806 /* Pretend we are connected */
807 sock->state = SS_CONNECTED;
808 sk->sk_state = TCP_ESTABLISHED;
812 #endif /* CONFIG_IRDA_ULTRA */
814 err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
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);
828 * Function irda_accept (sock, newsock, flags)
830 * Wait for incoming connection
833 static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
835 struct sock *sk = sock->sk;
836 struct irda_sock *new, *self = irda_sk(sk);
841 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
843 IRDA_ASSERT(self != NULL, return -1;);
845 err = irda_create(newsock, sk->sk_protocol);
849 if (sock->state != SS_UNCONNECTED)
852 if ((sk = sock->sk) == NULL)
855 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
856 (sk->sk_type != SOCK_DGRAM))
859 if (sk->sk_state != TCP_LISTEN)
863 * The read queue this time is holding sockets ready to use
864 * hooked into the SABM we saved
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 ;-)
876 skb = skb_dequeue(&sk->sk_receive_queue);
880 /* Non blocking operation */
881 if (flags & O_NONBLOCK)
884 err = wait_event_interruptible(*(sk->sk_sleep),
885 skb_peek(&sk->sk_receive_queue));
891 newsk->sk_state = TCP_ESTABLISHED;
893 new = irda_sk(newsk);
894 IRDA_ASSERT(new != NULL, return -1;);
896 /* Now attach up the new socket */
897 new->tsap = irttp_dup(self->tsap, new);
899 IRDA_DEBUG(0, "%s(), dup failed!\n", __FUNCTION__);
904 new->stsap_sel = new->tsap->stsap_sel;
905 new->dtsap_sel = new->tsap->dtsap_sel;
906 new->saddr = irttp_get_saddr(new->tsap);
907 new->daddr = irttp_get_daddr(new->tsap);
909 new->max_sdu_size_tx = self->max_sdu_size_tx;
910 new->max_sdu_size_rx = self->max_sdu_size_rx;
911 new->max_data_size = self->max_data_size;
912 new->max_header_size = self->max_header_size;
914 memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
916 /* Clean up the original one to keep it in listen state */
917 irttp_listen(self->tsap);
919 /* Wow ! What is that ? Jean II */
921 skb->destructor = NULL;
923 sk->sk_ack_backlog--;
925 newsock->state = SS_CONNECTED;
927 irda_connect_response(new);
933 * Function irda_connect (sock, uaddr, addr_len, flags)
935 * Connect to a IrDA device
937 * The main difference with a "standard" connect is that with IrDA we need
938 * to resolve the service name into a TSAP selector (in TCP, port number
939 * doesn't have to be resolved).
940 * Because of this service name resoltion, we can offer "auto-connect",
941 * where we connect to a service without specifying a destination address.
943 * Note : by consulting "errno", the user space caller may learn the cause
944 * of the failure. Most of them are visible in the function, others may come
945 * from subroutines called and are listed here :
946 * o EBUSY : already processing a connect
947 * o EHOSTUNREACH : bad addr->sir_addr argument
948 * o EADDRNOTAVAIL : bad addr->sir_name argument
949 * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
950 * o ENETUNREACH : no node found on the network (auto-connect)
952 static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
953 int addr_len, int flags)
955 struct sock *sk = sock->sk;
956 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
957 struct irda_sock *self = irda_sk(sk);
960 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
962 /* Don't allow connect for Ultra sockets */
963 if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
964 return -ESOCKTNOSUPPORT;
966 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
967 sock->state = SS_CONNECTED;
968 return 0; /* Connect completed during a ERESTARTSYS event */
971 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
972 sock->state = SS_UNCONNECTED;
973 return -ECONNREFUSED;
976 if (sk->sk_state == TCP_ESTABLISHED)
977 return -EISCONN; /* No reconnect on a seqpacket socket */
979 sk->sk_state = TCP_CLOSE;
980 sock->state = SS_UNCONNECTED;
982 if (addr_len != sizeof(struct sockaddr_irda))
985 /* Check if user supplied any destination device address */
986 if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
987 /* Try to find one suitable */
988 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
990 IRDA_DEBUG(0, "%s(), auto-connect failed!\n", __FUNCTION__);
994 /* Use the one provided by the user */
995 self->daddr = addr->sir_addr;
996 IRDA_DEBUG(1, "%s(), daddr = %08x\n", __FUNCTION__, self->daddr);
998 /* If we don't have a valid service name, we assume the
999 * user want to connect on a specific LSAP. Prevent
1000 * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
1001 if((addr->sir_name[0] != '\0') ||
1002 (addr->sir_lsap_sel >= 0x70)) {
1003 /* Query remote LM-IAS using service name */
1004 err = irda_find_lsap_sel(self, addr->sir_name);
1006 IRDA_DEBUG(0, "%s(), connect failed!\n", __FUNCTION__);
1010 /* Directly connect to the remote LSAP
1011 * specified by the sir_lsap field.
1012 * Please use with caution, in IrDA LSAPs are
1013 * dynamic and there is no "well-known" LSAP. */
1014 self->dtsap_sel = addr->sir_lsap_sel;
1018 /* Check if we have opened a local TSAP */
1020 irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1022 /* Move to connecting socket, start sending Connect Requests */
1023 sock->state = SS_CONNECTING;
1024 sk->sk_state = TCP_SYN_SENT;
1026 /* Connect to remote device */
1027 err = irttp_connect_request(self->tsap, self->dtsap_sel,
1028 self->saddr, self->daddr, NULL,
1029 self->max_sdu_size_rx, NULL);
1031 IRDA_DEBUG(0, "%s(), connect failed!\n", __FUNCTION__);
1036 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1037 return -EINPROGRESS;
1039 if (wait_event_interruptible(*(sk->sk_sleep),
1040 (sk->sk_state != TCP_SYN_SENT)))
1041 return -ERESTARTSYS;
1043 if (sk->sk_state != TCP_ESTABLISHED) {
1044 sock->state = SS_UNCONNECTED;
1045 err = sock_error(sk);
1046 return err? err : -ECONNRESET;
1049 sock->state = SS_CONNECTED;
1051 /* At this point, IrLMP has assigned our source address */
1052 self->saddr = irttp_get_saddr(self->tsap);
1057 static struct proto irda_proto = {
1059 .owner = THIS_MODULE,
1060 .obj_size = sizeof(struct irda_sock),
1064 * Function irda_create (sock, protocol)
1066 * Create IrDA socket
1069 static int irda_create(struct socket *sock, int protocol)
1072 struct irda_sock *self;
1074 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
1076 /* Check for valid socket type */
1077 switch (sock->type) {
1078 case SOCK_STREAM: /* For TTP connections with SAR disabled */
1079 case SOCK_SEQPACKET: /* For TTP connections with SAR enabled */
1080 case SOCK_DGRAM: /* For TTP Unitdata or LMP Ultra transfers */
1083 return -ESOCKTNOSUPPORT;
1086 /* Allocate networking socket */
1087 sk = sk_alloc(PF_IRDA, GFP_ATOMIC, &irda_proto, 1);
1092 IRDA_DEBUG(2, "%s() : self is %p\n", __FUNCTION__, self);
1094 init_waitqueue_head(&self->query_wait);
1096 /* Initialise networking socket struct */
1097 sock_init_data(sock, sk); /* Note : set sk->sk_refcnt to 1 */
1098 sk->sk_family = PF_IRDA;
1099 sk->sk_protocol = protocol;
1101 switch (sock->type) {
1103 sock->ops = &irda_stream_ops;
1104 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1106 case SOCK_SEQPACKET:
1107 sock->ops = &irda_seqpacket_ops;
1108 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1112 #ifdef CONFIG_IRDA_ULTRA
1113 case IRDAPROTO_ULTRA:
1114 sock->ops = &irda_ultra_ops;
1115 /* Initialise now, because we may send on unbound
1116 * sockets. Jean II */
1117 self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1118 self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1120 #endif /* CONFIG_IRDA_ULTRA */
1121 case IRDAPROTO_UNITDATA:
1122 sock->ops = &irda_dgram_ops;
1123 /* We let Unitdata conn. be like seqpack conn. */
1124 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1127 IRDA_ERROR("%s: protocol not supported!\n",
1129 return -ESOCKTNOSUPPORT;
1133 return -ESOCKTNOSUPPORT;
1136 /* Register as a client with IrLMP */
1137 self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1138 self->mask.word = 0xffff;
1139 self->rx_flow = self->tx_flow = FLOW_START;
1140 self->nslots = DISCOVERY_DEFAULT_SLOTS;
1141 self->daddr = DEV_ADDR_ANY; /* Until we get connected */
1142 self->saddr = 0x0; /* so IrLMP assign us any link */
1147 * Function irda_destroy_socket (self)
1152 static void irda_destroy_socket(struct irda_sock *self)
1154 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
1156 IRDA_ASSERT(self != NULL, return;);
1158 /* Unregister with IrLMP */
1159 irlmp_unregister_client(self->ckey);
1160 irlmp_unregister_service(self->skey);
1162 /* Unregister with LM-IAS */
1163 if (self->ias_obj) {
1164 irias_delete_object(self->ias_obj);
1165 self->ias_obj = NULL;
1169 iriap_close(self->iriap);
1174 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1175 irttp_close_tsap(self->tsap);
1178 #ifdef CONFIG_IRDA_ULTRA
1180 irlmp_close_lsap(self->lsap);
1183 #endif /* CONFIG_IRDA_ULTRA */
1187 * Function irda_release (sock)
1189 static int irda_release(struct socket *sock)
1191 struct sock *sk = sock->sk;
1193 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
1199 sk->sk_state = TCP_CLOSE;
1200 sk->sk_shutdown |= SEND_SHUTDOWN;
1201 sk->sk_state_change(sk);
1203 /* Destroy IrDA socket */
1204 irda_destroy_socket(irda_sk(sk));
1210 /* Purge queues (see sock_init_data()) */
1211 skb_queue_purge(&sk->sk_receive_queue);
1213 /* Destroy networking socket if we are the last reference on it,
1214 * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1217 /* Notes on socket locking and deallocation... - Jean II
1218 * In theory we should put pairs of sock_hold() / sock_put() to
1219 * prevent the socket to be destroyed whenever there is an
1220 * outstanding request or outstanding incoming packet or event.
1222 * 1) This may include IAS request, both in connect and getsockopt.
1223 * Unfortunately, the situation is a bit more messy than it looks,
1224 * because we close iriap and kfree(self) above.
1226 * 2) This may include selective discovery in getsockopt.
1227 * Same stuff as above, irlmp registration and self are gone.
1229 * Probably 1 and 2 may not matter, because it's all triggered
1230 * by a process and the socket layer already prevent the
1231 * socket to go away while a process is holding it, through
1232 * sockfd_put() and fput()...
1234 * 3) This may include deferred TSAP closure. In particular,
1235 * we may receive a late irda_disconnect_indication()
1236 * Fortunately, (tsap_cb *)->close_pend should protect us
1239 * I did some testing on SMP, and it looks solid. And the socket
1240 * memory leak is now gone... - Jean II
1247 * Function irda_sendmsg (iocb, sock, msg, len)
1249 * Send message down to TinyTP. This function is used for both STREAM and
1250 * SEQPACK services. This is possible since it forces the client to
1251 * fragment the message if necessary
1253 static int irda_sendmsg(struct kiocb *iocb, struct socket *sock,
1254 struct msghdr *msg, size_t len)
1256 struct sock *sk = sock->sk;
1257 struct irda_sock *self;
1258 struct sk_buff *skb;
1261 IRDA_DEBUG(4, "%s(), len=%zd\n", __FUNCTION__, len);
1263 /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1264 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1267 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1268 send_sig(SIGPIPE, current, 0);
1272 if (sk->sk_state != TCP_ESTABLISHED)
1276 IRDA_ASSERT(self != NULL, return -1;);
1278 /* Check if IrTTP is wants us to slow down */
1280 if (wait_event_interruptible(*(sk->sk_sleep),
1281 (self->tx_flow != FLOW_STOP || sk->sk_state != TCP_ESTABLISHED)))
1282 return -ERESTARTSYS;
1284 /* Check if we are still connected */
1285 if (sk->sk_state != TCP_ESTABLISHED)
1288 /* Check that we don't send out too big frames */
1289 if (len > self->max_data_size) {
1290 IRDA_DEBUG(2, "%s(), Chopping frame from %zd to %d bytes!\n",
1291 __FUNCTION__, len, self->max_data_size);
1292 len = self->max_data_size;
1295 skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
1296 msg->msg_flags & MSG_DONTWAIT, &err);
1300 skb_reserve(skb, self->max_header_size + 16);
1301 skb_reset_transport_header(skb);
1303 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1310 * Just send the message to TinyTP, and let it deal with possible
1311 * errors. No need to duplicate all that here
1313 err = irttp_data_request(self->tsap, skb);
1315 IRDA_DEBUG(0, "%s(), err=%d\n", __FUNCTION__, err);
1318 /* Tell client how much data we actually sent */
1323 * Function irda_recvmsg_dgram (iocb, sock, msg, size, flags)
1325 * Try to receive message and copy it to user. The frame is discarded
1326 * after being read, regardless of how much the user actually read
1328 static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock,
1329 struct msghdr *msg, size_t size, int flags)
1331 struct sock *sk = sock->sk;
1332 struct irda_sock *self = irda_sk(sk);
1333 struct sk_buff *skb;
1337 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
1339 IRDA_ASSERT(self != NULL, return -1;);
1341 if ((err = sock_error(sk)) < 0)
1344 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1345 flags & MSG_DONTWAIT, &err);
1349 skb_reset_transport_header(skb);
1352 if (copied > size) {
1353 IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n",
1354 __FUNCTION__, copied, size);
1356 msg->msg_flags |= MSG_TRUNC;
1358 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1360 skb_free_datagram(sk, skb);
1363 * Check if we have previously stopped IrTTP and we know
1364 * have more free space in our rx_queue. If so tell IrTTP
1365 * to start delivering frames again before our rx_queue gets
1368 if (self->rx_flow == FLOW_STOP) {
1369 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1370 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __FUNCTION__);
1371 self->rx_flow = FLOW_START;
1372 irttp_flow_request(self->tsap, FLOW_START);
1380 * Function irda_recvmsg_stream (iocb, sock, msg, size, flags)
1382 static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
1383 struct msghdr *msg, size_t size, int flags)
1385 struct sock *sk = sock->sk;
1386 struct irda_sock *self = irda_sk(sk);
1387 int noblock = flags & MSG_DONTWAIT;
1392 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
1394 IRDA_ASSERT(self != NULL, return -1;);
1396 if ((err = sock_error(sk)) < 0)
1399 if (sock->flags & __SO_ACCEPTCON)
1402 if (flags & MSG_OOB)
1405 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1406 timeo = sock_rcvtimeo(sk, noblock);
1408 msg->msg_namelen = 0;
1412 struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1418 if (copied >= target)
1421 prepare_to_wait_exclusive(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
1424 * POSIX 1003.1g mandates this order.
1426 ret = sock_error(sk);
1429 else if (sk->sk_shutdown & RCV_SHUTDOWN)
1433 else if (signal_pending(current))
1434 ret = sock_intr_errno(timeo);
1435 else if (sk->sk_state != TCP_ESTABLISHED)
1437 else if (skb_peek(&sk->sk_receive_queue) == NULL)
1438 /* Wait process until data arrives */
1441 finish_wait(sk->sk_sleep, &wait);
1445 if (sk->sk_shutdown & RCV_SHUTDOWN)
1451 chunk = min_t(unsigned int, skb->len, size);
1452 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1453 skb_queue_head(&sk->sk_receive_queue, skb);
1461 /* Mark read part of skb as used */
1462 if (!(flags & MSG_PEEK)) {
1463 skb_pull(skb, chunk);
1465 /* put the skb back if we didn't use it up.. */
1467 IRDA_DEBUG(1, "%s(), back on q!\n",
1469 skb_queue_head(&sk->sk_receive_queue, skb);
1475 IRDA_DEBUG(0, "%s() questionable!?\n", __FUNCTION__);
1477 /* put message back and return */
1478 skb_queue_head(&sk->sk_receive_queue, skb);
1484 * Check if we have previously stopped IrTTP and we know
1485 * have more free space in our rx_queue. If so tell IrTTP
1486 * to start delivering frames again before our rx_queue gets
1489 if (self->rx_flow == FLOW_STOP) {
1490 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1491 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __FUNCTION__);
1492 self->rx_flow = FLOW_START;
1493 irttp_flow_request(self->tsap, FLOW_START);
1501 * Function irda_sendmsg_dgram (iocb, sock, msg, len)
1503 * Send message down to TinyTP for the unreliable sequenced
1507 static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock,
1508 struct msghdr *msg, size_t len)
1510 struct sock *sk = sock->sk;
1511 struct irda_sock *self;
1512 struct sk_buff *skb;
1515 IRDA_DEBUG(4, "%s(), len=%zd\n", __FUNCTION__, len);
1517 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1520 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1521 send_sig(SIGPIPE, current, 0);
1525 if (sk->sk_state != TCP_ESTABLISHED)
1529 IRDA_ASSERT(self != NULL, return -1;);
1532 * Check that we don't send out too big frames. This is an unreliable
1533 * service, so we have no fragmentation and no coalescence
1535 if (len > self->max_data_size) {
1536 IRDA_DEBUG(0, "%s(), Warning to much data! "
1537 "Chopping frame from %zd to %d bytes!\n",
1538 __FUNCTION__, len, self->max_data_size);
1539 len = self->max_data_size;
1542 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1543 msg->msg_flags & MSG_DONTWAIT, &err);
1547 skb_reserve(skb, self->max_header_size);
1548 skb_reset_transport_header(skb);
1550 IRDA_DEBUG(4, "%s(), appending user data\n", __FUNCTION__);
1552 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1559 * Just send the message to TinyTP, and let it deal with possible
1560 * errors. No need to duplicate all that here
1562 err = irttp_udata_request(self->tsap, skb);
1564 IRDA_DEBUG(0, "%s(), err=%d\n", __FUNCTION__, err);
1571 * Function irda_sendmsg_ultra (iocb, sock, msg, len)
1573 * Send message down to IrLMP for the unreliable Ultra
1576 #ifdef CONFIG_IRDA_ULTRA
1577 static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock,
1578 struct msghdr *msg, size_t len)
1580 struct sock *sk = sock->sk;
1581 struct irda_sock *self;
1584 struct sk_buff *skb;
1587 IRDA_DEBUG(4, "%s(), len=%zd\n", __FUNCTION__, len);
1589 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1592 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1593 send_sig(SIGPIPE, current, 0);
1598 IRDA_ASSERT(self != NULL, return -1;);
1600 /* Check if an address was specified with sendto. Jean II */
1601 if (msg->msg_name) {
1602 struct sockaddr_irda *addr = (struct sockaddr_irda *) msg->msg_name;
1603 /* Check address, extract pid. Jean II */
1604 if (msg->msg_namelen < sizeof(*addr))
1606 if (addr->sir_family != AF_IRDA)
1609 pid = addr->sir_lsap_sel;
1611 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __FUNCTION__);
1615 /* Check that the socket is properly bound to an Ultra
1617 if ((self->lsap == NULL) ||
1618 (sk->sk_state != TCP_ESTABLISHED)) {
1619 IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n",
1623 /* Use PID from socket */
1628 * Check that we don't send out too big frames. This is an unreliable
1629 * service, so we have no fragmentation and no coalescence
1631 if (len > self->max_data_size) {
1632 IRDA_DEBUG(0, "%s(), Warning to much data! "
1633 "Chopping frame from %zd to %d bytes!\n",
1634 __FUNCTION__, len, self->max_data_size);
1635 len = self->max_data_size;
1638 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1639 msg->msg_flags & MSG_DONTWAIT, &err);
1643 skb_reserve(skb, self->max_header_size);
1644 skb_reset_transport_header(skb);
1646 IRDA_DEBUG(4, "%s(), appending user data\n", __FUNCTION__);
1648 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1654 err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1657 IRDA_DEBUG(0, "%s(), err=%d\n", __FUNCTION__, err);
1662 #endif /* CONFIG_IRDA_ULTRA */
1665 * Function irda_shutdown (sk, how)
1667 static int irda_shutdown(struct socket *sock, int how)
1669 struct sock *sk = sock->sk;
1670 struct irda_sock *self = irda_sk(sk);
1672 IRDA_ASSERT(self != NULL, return -1;);
1674 IRDA_DEBUG(1, "%s(%p)\n", __FUNCTION__, self);
1676 sk->sk_state = TCP_CLOSE;
1677 sk->sk_shutdown |= SEND_SHUTDOWN;
1678 sk->sk_state_change(sk);
1681 iriap_close(self->iriap);
1686 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1687 irttp_close_tsap(self->tsap);
1691 /* A few cleanup so the socket look as good as new... */
1692 self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */
1693 self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */
1694 self->saddr = 0x0; /* so IrLMP assign us any link */
1700 * Function irda_poll (file, sock, wait)
1702 static unsigned int irda_poll(struct file * file, struct socket *sock,
1705 struct sock *sk = sock->sk;
1706 struct irda_sock *self = irda_sk(sk);
1709 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
1711 poll_wait(file, sk->sk_sleep, wait);
1714 /* Exceptional events? */
1717 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1718 IRDA_DEBUG(0, "%s(), POLLHUP\n", __FUNCTION__);
1723 if (!skb_queue_empty(&sk->sk_receive_queue)) {
1724 IRDA_DEBUG(4, "Socket is readable\n");
1725 mask |= POLLIN | POLLRDNORM;
1728 /* Connection-based need to check for termination and startup */
1729 switch (sk->sk_type) {
1731 if (sk->sk_state == TCP_CLOSE) {
1732 IRDA_DEBUG(0, "%s(), POLLHUP\n", __FUNCTION__);
1736 if (sk->sk_state == TCP_ESTABLISHED) {
1737 if ((self->tx_flow == FLOW_START) &&
1740 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1744 case SOCK_SEQPACKET:
1745 if ((self->tx_flow == FLOW_START) &&
1748 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1752 if (sock_writeable(sk))
1753 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1762 * Function irda_ioctl (sock, cmd, arg)
1764 static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1766 struct sock *sk = sock->sk;
1768 IRDA_DEBUG(4, "%s(), cmd=%#x\n", __FUNCTION__, cmd);
1773 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1776 if (put_user(amount, (unsigned int __user *)arg))
1782 struct sk_buff *skb;
1784 /* These two are safe on a single CPU system as only user tasks fiddle here */
1785 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1787 if (put_user(amount, (unsigned int __user *)arg))
1794 return sock_get_timestamp(sk, (struct timeval __user *)arg);
1799 case SIOCGIFDSTADDR:
1800 case SIOCSIFDSTADDR:
1801 case SIOCGIFBRDADDR:
1802 case SIOCSIFBRDADDR:
1803 case SIOCGIFNETMASK:
1804 case SIOCSIFNETMASK:
1809 IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __FUNCTION__);
1810 return -ENOIOCTLCMD;
1817 #ifdef CONFIG_COMPAT
1819 * Function irda_ioctl (sock, cmd, arg)
1821 static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1824 * All IRDA's ioctl are standard ones.
1826 return -ENOIOCTLCMD;
1831 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1833 * Set some options for the socket
1836 static int irda_setsockopt(struct socket *sock, int level, int optname,
1837 char __user *optval, int optlen)
1839 struct sock *sk = sock->sk;
1840 struct irda_sock *self = irda_sk(sk);
1841 struct irda_ias_set *ias_opt;
1842 struct ias_object *ias_obj;
1843 struct ias_attrib * ias_attr; /* Attribute in IAS object */
1846 IRDA_ASSERT(self != NULL, return -1;);
1848 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
1850 if (level != SOL_IRLMP)
1851 return -ENOPROTOOPT;
1855 /* The user want to add an attribute to an existing IAS object
1856 * (in the IAS database) or to create a new object with this
1858 * We first query IAS to know if the object exist, and then
1859 * create the right attribute...
1862 if (optlen != sizeof(struct irda_ias_set))
1865 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1866 if (ias_opt == NULL)
1869 /* Copy query to the driver. */
1870 if (copy_from_user(ias_opt, optval, optlen)) {
1875 /* Find the object we target.
1876 * If the user gives us an empty string, we use the object
1877 * associated with this socket. This will workaround
1878 * duplicated class name - Jean II */
1879 if(ias_opt->irda_class_name[0] == '\0') {
1880 if(self->ias_obj == NULL) {
1884 ias_obj = self->ias_obj;
1886 ias_obj = irias_find_object(ias_opt->irda_class_name);
1888 /* Only ROOT can mess with the global IAS database.
1889 * Users can only add attributes to the object associated
1890 * with the socket they own - Jean II */
1891 if((!capable(CAP_NET_ADMIN)) &&
1892 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1897 /* If the object doesn't exist, create it */
1898 if(ias_obj == (struct ias_object *) NULL) {
1899 /* Create a new object */
1900 ias_obj = irias_new_object(ias_opt->irda_class_name,
1904 /* Do we have the attribute already ? */
1905 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1910 /* Look at the type */
1911 switch(ias_opt->irda_attrib_type) {
1913 /* Add an integer attribute */
1914 irias_add_integer_attrib(
1916 ias_opt->irda_attrib_name,
1917 ias_opt->attribute.irda_attrib_int,
1922 if(ias_opt->attribute.irda_attrib_octet_seq.len >
1923 IAS_MAX_OCTET_STRING) {
1927 /* Add an octet sequence attribute */
1928 irias_add_octseq_attrib(
1930 ias_opt->irda_attrib_name,
1931 ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
1932 ias_opt->attribute.irda_attrib_octet_seq.len,
1936 /* Should check charset & co */
1938 /* The length is encoded in a __u8, and
1939 * IAS_MAX_STRING == 256, so there is no way
1940 * userspace can pass us a string too large.
1942 /* NULL terminate the string (avoid troubles) */
1943 ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
1944 /* Add a string attribute */
1945 irias_add_string_attrib(
1947 ias_opt->irda_attrib_name,
1948 ias_opt->attribute.irda_attrib_string.string,
1955 irias_insert_object(ias_obj);
1959 /* The user want to delete an object from our local IAS
1960 * database. We just need to query the IAS, check is the
1961 * object is not owned by the kernel and delete it.
1964 if (optlen != sizeof(struct irda_ias_set))
1967 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1968 if (ias_opt == NULL)
1971 /* Copy query to the driver. */
1972 if (copy_from_user(ias_opt, optval, optlen)) {
1977 /* Find the object we target.
1978 * If the user gives us an empty string, we use the object
1979 * associated with this socket. This will workaround
1980 * duplicated class name - Jean II */
1981 if(ias_opt->irda_class_name[0] == '\0')
1982 ias_obj = self->ias_obj;
1984 ias_obj = irias_find_object(ias_opt->irda_class_name);
1985 if(ias_obj == (struct ias_object *) NULL) {
1990 /* Only ROOT can mess with the global IAS database.
1991 * Users can only del attributes from the object associated
1992 * with the socket they own - Jean II */
1993 if((!capable(CAP_NET_ADMIN)) &&
1994 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1999 /* Find the attribute (in the object) we target */
2000 ias_attr = irias_find_attrib(ias_obj,
2001 ias_opt->irda_attrib_name);
2002 if(ias_attr == (struct ias_attrib *) NULL) {
2007 /* Check is the user space own the object */
2008 if(ias_attr->value->owner != IAS_USER_ATTR) {
2009 IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __FUNCTION__);
2014 /* Remove the attribute (and maybe the object) */
2015 irias_delete_attrib(ias_obj, ias_attr, 1);
2018 case IRLMP_MAX_SDU_SIZE:
2019 if (optlen < sizeof(int))
2022 if (get_user(opt, (int __user *)optval))
2025 /* Only possible for a seqpacket service (TTP with SAR) */
2026 if (sk->sk_type != SOCK_SEQPACKET) {
2027 IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n",
2029 self->max_sdu_size_rx = opt;
2031 IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2033 return -ENOPROTOOPT;
2036 case IRLMP_HINTS_SET:
2037 if (optlen < sizeof(int))
2040 /* The input is really a (__u8 hints[2]), easier as an int */
2041 if (get_user(opt, (int __user *)optval))
2044 /* Unregister any old registration */
2046 irlmp_unregister_service(self->skey);
2048 self->skey = irlmp_register_service((__u16) opt);
2050 case IRLMP_HINT_MASK_SET:
2051 /* As opposed to the previous case which set the hint bits
2052 * that we advertise, this one set the filter we use when
2053 * making a discovery (nodes which don't match any hint
2054 * bit in the mask are not reported).
2056 if (optlen < sizeof(int))
2059 /* The input is really a (__u8 hints[2]), easier as an int */
2060 if (get_user(opt, (int __user *)optval))
2063 /* Set the new hint mask */
2064 self->mask.word = (__u16) opt;
2065 /* Mask out extension bits */
2066 self->mask.word &= 0x7f7f;
2067 /* Check if no bits */
2068 if(!self->mask.word)
2069 self->mask.word = 0xFFFF;
2073 return -ENOPROTOOPT;
2079 * Function irda_extract_ias_value(ias_opt, ias_value)
2081 * Translate internal IAS value structure to the user space representation
2083 * The external representation of IAS values, as we exchange them with
2084 * user space program is quite different from the internal representation,
2085 * as stored in the IAS database (because we need a flat structure for
2086 * crossing kernel boundary).
2087 * This function transform the former in the latter. We also check
2088 * that the value type is valid.
2090 static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2091 struct ias_value *ias_value)
2093 /* Look at the type */
2094 switch (ias_value->type) {
2096 /* Copy the integer */
2097 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2101 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2103 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2104 ias_value->t.oct_seq, ias_value->len);
2108 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2109 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2111 memcpy(ias_opt->attribute.irda_attrib_string.string,
2112 ias_value->t.string, ias_value->len);
2113 /* NULL terminate the string (avoid troubles) */
2114 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2121 /* Copy type over */
2122 ias_opt->irda_attrib_type = ias_value->type;
2128 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2130 static int irda_getsockopt(struct socket *sock, int level, int optname,
2131 char __user *optval, int __user *optlen)
2133 struct sock *sk = sock->sk;
2134 struct irda_sock *self = irda_sk(sk);
2135 struct irda_device_list list;
2136 struct irda_device_info *discoveries;
2137 struct irda_ias_set * ias_opt; /* IAS get/query params */
2138 struct ias_object * ias_obj; /* Object in IAS */
2139 struct ias_attrib * ias_attr; /* Attribute in IAS object */
2140 int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */
2146 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
2148 if (level != SOL_IRLMP)
2149 return -ENOPROTOOPT;
2151 if (get_user(len, optlen))
2158 case IRLMP_ENUMDEVICES:
2159 /* Ask lmp for the current discovery log */
2160 discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2162 /* Check if the we got some results */
2163 if (discoveries == NULL)
2164 return -EAGAIN; /* Didn't find any devices */
2167 /* Write total list length back to client */
2168 if (copy_to_user(optval, &list,
2169 sizeof(struct irda_device_list) -
2170 sizeof(struct irda_device_info)))
2173 /* Offset to first device entry */
2174 offset = sizeof(struct irda_device_list) -
2175 sizeof(struct irda_device_info);
2177 /* Copy the list itself - watch for overflow */
2183 total = offset + (list.len * sizeof(struct irda_device_info));
2186 if (copy_to_user(optval+offset, discoveries, total - offset))
2189 /* Write total number of bytes used back to client */
2190 if (put_user(total, optlen))
2193 /* Free up our buffer */
2198 case IRLMP_MAX_SDU_SIZE:
2199 val = self->max_data_size;
2201 if (put_user(len, optlen))
2204 if (copy_to_user(optval, &val, len))
2208 /* The user want an object from our local IAS database.
2209 * We just need to query the IAS and return the value
2212 /* Check that the user has allocated the right space for us */
2213 if (len != sizeof(struct irda_ias_set))
2216 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2217 if (ias_opt == NULL)
2220 /* Copy query to the driver. */
2221 if (copy_from_user(ias_opt, optval, len)) {
2226 /* Find the object we target.
2227 * If the user gives us an empty string, we use the object
2228 * associated with this socket. This will workaround
2229 * duplicated class name - Jean II */
2230 if(ias_opt->irda_class_name[0] == '\0')
2231 ias_obj = self->ias_obj;
2233 ias_obj = irias_find_object(ias_opt->irda_class_name);
2234 if(ias_obj == (struct ias_object *) NULL) {
2239 /* Find the attribute (in the object) we target */
2240 ias_attr = irias_find_attrib(ias_obj,
2241 ias_opt->irda_attrib_name);
2242 if(ias_attr == (struct ias_attrib *) NULL) {
2247 /* Translate from internal to user structure */
2248 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2254 /* Copy reply to the user */
2255 if (copy_to_user(optval, ias_opt,
2256 sizeof(struct irda_ias_set))) {
2260 /* Note : don't need to put optlen, we checked it */
2263 case IRLMP_IAS_QUERY:
2264 /* The user want an object from a remote IAS database.
2265 * We need to use IAP to query the remote database and
2266 * then wait for the answer to come back. */
2268 /* Check that the user has allocated the right space for us */
2269 if (len != sizeof(struct irda_ias_set))
2272 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2273 if (ias_opt == NULL)
2276 /* Copy query to the driver. */
2277 if (copy_from_user(ias_opt, optval, len)) {
2282 /* At this point, there are two cases...
2283 * 1) the socket is connected - that's the easy case, we
2284 * just query the device we are connected to...
2285 * 2) the socket is not connected - the user doesn't want
2286 * to connect and/or may not have a valid service name
2287 * (so can't create a fake connection). In this case,
2288 * we assume that the user pass us a valid destination
2289 * address in the requesting structure...
2291 if(self->daddr != DEV_ADDR_ANY) {
2292 /* We are connected - reuse known daddr */
2293 daddr = self->daddr;
2295 /* We are not connected, we must specify a valid
2296 * destination address */
2297 daddr = ias_opt->daddr;
2298 if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2304 /* Check that we can proceed with IAP */
2306 IRDA_WARNING("%s: busy with a previous query\n",
2312 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2313 irda_getvalue_confirm);
2315 if (self->iriap == NULL) {
2320 /* Treat unexpected wakeup as disconnect */
2321 self->errno = -EHOSTUNREACH;
2323 /* Query remote LM-IAS */
2324 iriap_getvaluebyclass_request(self->iriap,
2326 ias_opt->irda_class_name,
2327 ias_opt->irda_attrib_name);
2329 /* Wait for answer, if not yet finished (or failed) */
2330 if (wait_event_interruptible(self->query_wait,
2331 (self->iriap == NULL))) {
2332 /* pending request uses copy of ias_opt-content
2333 * we can free it regardless! */
2335 /* Treat signals as disconnect */
2336 return -EHOSTUNREACH;
2339 /* Check what happened */
2343 /* Requested object/attribute doesn't exist */
2344 if((self->errno == IAS_CLASS_UNKNOWN) ||
2345 (self->errno == IAS_ATTRIB_UNKNOWN))
2346 return (-EADDRNOTAVAIL);
2348 return (-EHOSTUNREACH);
2351 /* Translate from internal to user structure */
2352 err = irda_extract_ias_value(ias_opt, self->ias_result);
2353 if (self->ias_result)
2354 irias_delete_value(self->ias_result);
2360 /* Copy reply to the user */
2361 if (copy_to_user(optval, ias_opt,
2362 sizeof(struct irda_ias_set))) {
2366 /* Note : don't need to put optlen, we checked it */
2369 case IRLMP_WAITDEVICE:
2370 /* This function is just another way of seeing life ;-)
2371 * IRLMP_ENUMDEVICES assumes that you have a static network,
2372 * and that you just want to pick one of the devices present.
2373 * On the other hand, in here we assume that no device is
2374 * present and that at some point in the future a device will
2375 * come into range. When this device arrive, we just wake
2376 * up the caller, so that he has time to connect to it before
2377 * the device goes away...
2378 * Note : once the node has been discovered for more than a
2379 * few second, it won't trigger this function, unless it
2380 * goes away and come back changes its hint bits (so we
2381 * might call it IRLMP_WAITNEWDEVICE).
2384 /* Check that the user is passing us an int */
2385 if (len != sizeof(int))
2387 /* Get timeout in ms (max time we block the caller) */
2388 if (get_user(val, (int __user *)optval))
2391 /* Tell IrLMP we want to be notified */
2392 irlmp_update_client(self->ckey, self->mask.word,
2393 irda_selective_discovery_indication,
2394 NULL, (void *) self);
2396 /* Do some discovery (and also return cached results) */
2397 irlmp_discovery_request(self->nslots);
2399 /* Wait until a node is discovered */
2400 if (!self->cachedaddr) {
2403 IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __FUNCTION__);
2405 /* Set watchdog timer to expire in <val> ms. */
2407 init_timer(&self->watchdog);
2408 self->watchdog.function = irda_discovery_timeout;
2409 self->watchdog.data = (unsigned long) self;
2410 self->watchdog.expires = jiffies + (val * HZ/1000);
2411 add_timer(&(self->watchdog));
2413 /* Wait for IR-LMP to call us back */
2414 __wait_event_interruptible(self->query_wait,
2415 (self->cachedaddr != 0 || self->errno == -ETIME),
2418 /* If watchdog is still activated, kill it! */
2419 if(timer_pending(&(self->watchdog)))
2420 del_timer(&(self->watchdog));
2422 IRDA_DEBUG(1, "%s(), ...waking up !\n", __FUNCTION__);
2428 IRDA_DEBUG(1, "%s(), found immediately !\n",
2431 /* Tell IrLMP that we have been notified */
2432 irlmp_update_client(self->ckey, self->mask.word,
2435 /* Check if the we got some results */
2436 if (!self->cachedaddr)
2437 return -EAGAIN; /* Didn't find any devices */
2438 daddr = self->cachedaddr;
2440 self->cachedaddr = 0;
2442 /* We return the daddr of the device that trigger the
2443 * wakeup. As irlmp pass us only the new devices, we
2444 * are sure that it's not an old device.
2445 * If the user want more details, he should query
2446 * the whole discovery log and pick one device...
2448 if (put_user(daddr, (int __user *)optval))
2453 return -ENOPROTOOPT;
2459 static struct net_proto_family irda_family_ops = {
2461 .create = irda_create,
2462 .owner = THIS_MODULE,
2465 static const struct proto_ops SOCKOPS_WRAPPED(irda_stream_ops) = {
2467 .owner = THIS_MODULE,
2468 .release = irda_release,
2470 .connect = irda_connect,
2471 .socketpair = sock_no_socketpair,
2472 .accept = irda_accept,
2473 .getname = irda_getname,
2475 .ioctl = irda_ioctl,
2476 #ifdef CONFIG_COMPAT
2477 .compat_ioctl = irda_compat_ioctl,
2479 .listen = irda_listen,
2480 .shutdown = irda_shutdown,
2481 .setsockopt = irda_setsockopt,
2482 .getsockopt = irda_getsockopt,
2483 .sendmsg = irda_sendmsg,
2484 .recvmsg = irda_recvmsg_stream,
2485 .mmap = sock_no_mmap,
2486 .sendpage = sock_no_sendpage,
2489 static const struct proto_ops SOCKOPS_WRAPPED(irda_seqpacket_ops) = {
2491 .owner = THIS_MODULE,
2492 .release = irda_release,
2494 .connect = irda_connect,
2495 .socketpair = sock_no_socketpair,
2496 .accept = irda_accept,
2497 .getname = irda_getname,
2498 .poll = datagram_poll,
2499 .ioctl = irda_ioctl,
2500 #ifdef CONFIG_COMPAT
2501 .compat_ioctl = irda_compat_ioctl,
2503 .listen = irda_listen,
2504 .shutdown = irda_shutdown,
2505 .setsockopt = irda_setsockopt,
2506 .getsockopt = irda_getsockopt,
2507 .sendmsg = irda_sendmsg,
2508 .recvmsg = irda_recvmsg_dgram,
2509 .mmap = sock_no_mmap,
2510 .sendpage = sock_no_sendpage,
2513 static const struct proto_ops SOCKOPS_WRAPPED(irda_dgram_ops) = {
2515 .owner = THIS_MODULE,
2516 .release = irda_release,
2518 .connect = irda_connect,
2519 .socketpair = sock_no_socketpair,
2520 .accept = irda_accept,
2521 .getname = irda_getname,
2522 .poll = datagram_poll,
2523 .ioctl = irda_ioctl,
2524 #ifdef CONFIG_COMPAT
2525 .compat_ioctl = irda_compat_ioctl,
2527 .listen = irda_listen,
2528 .shutdown = irda_shutdown,
2529 .setsockopt = irda_setsockopt,
2530 .getsockopt = irda_getsockopt,
2531 .sendmsg = irda_sendmsg_dgram,
2532 .recvmsg = irda_recvmsg_dgram,
2533 .mmap = sock_no_mmap,
2534 .sendpage = sock_no_sendpage,
2537 #ifdef CONFIG_IRDA_ULTRA
2538 static const struct proto_ops SOCKOPS_WRAPPED(irda_ultra_ops) = {
2540 .owner = THIS_MODULE,
2541 .release = irda_release,
2543 .connect = sock_no_connect,
2544 .socketpair = sock_no_socketpair,
2545 .accept = sock_no_accept,
2546 .getname = irda_getname,
2547 .poll = datagram_poll,
2548 .ioctl = irda_ioctl,
2549 #ifdef CONFIG_COMPAT
2550 .compat_ioctl = irda_compat_ioctl,
2552 .listen = sock_no_listen,
2553 .shutdown = irda_shutdown,
2554 .setsockopt = irda_setsockopt,
2555 .getsockopt = irda_getsockopt,
2556 .sendmsg = irda_sendmsg_ultra,
2557 .recvmsg = irda_recvmsg_dgram,
2558 .mmap = sock_no_mmap,
2559 .sendpage = sock_no_sendpage,
2561 #endif /* CONFIG_IRDA_ULTRA */
2563 #include <linux/smp_lock.h>
2564 SOCKOPS_WRAP(irda_stream, PF_IRDA);
2565 SOCKOPS_WRAP(irda_seqpacket, PF_IRDA);
2566 SOCKOPS_WRAP(irda_dgram, PF_IRDA);
2567 #ifdef CONFIG_IRDA_ULTRA
2568 SOCKOPS_WRAP(irda_ultra, PF_IRDA);
2569 #endif /* CONFIG_IRDA_ULTRA */
2572 * Function irsock_init (pro)
2574 * Initialize IrDA protocol
2577 int __init irsock_init(void)
2579 int rc = proto_register(&irda_proto, 0);
2582 rc = sock_register(&irda_family_ops);
2588 * Function irsock_cleanup (void)
2590 * Remove IrDA protocol
2593 void __exit irsock_cleanup(void)
2595 sock_unregister(PF_IRDA);
2596 proto_unregister(&irda_proto);