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/config.h>
46 #include <linux/capability.h>
47 #include <linux/module.h>
48 #include <linux/types.h>
49 #include <linux/socket.h>
50 #include <linux/sockios.h>
51 #include <linux/init.h>
52 #include <linux/net.h>
53 #include <linux/irda.h>
54 #include <linux/poll.h>
56 #include <asm/ioctls.h> /* TIOCOUTQ, TIOCINQ */
57 #include <asm/uaccess.h>
60 #include <net/tcp_states.h>
62 #include <net/irda/af_irda.h>
64 static int irda_create(struct socket *sock, int protocol);
66 static const struct proto_ops irda_stream_ops;
67 static const struct proto_ops irda_seqpacket_ops;
68 static const struct proto_ops irda_dgram_ops;
70 #ifdef CONFIG_IRDA_ULTRA
71 static const struct proto_ops irda_ultra_ops;
72 #define ULTRA_MAX_DATA 382
73 #endif /* CONFIG_IRDA_ULTRA */
75 #define IRDA_MAX_HEADER (TTP_MAX_HEADER)
78 * Function irda_data_indication (instance, sap, skb)
80 * Received some data from TinyTP. Just queue it on the receive queue
83 static int irda_data_indication(void *instance, void *sap, struct sk_buff *skb)
85 struct irda_sock *self;
89 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
93 IRDA_ASSERT(sk != NULL, return -1;);
95 err = sock_queue_rcv_skb(sk, skb);
97 IRDA_DEBUG(1, "%s(), error: no more mem!\n", __FUNCTION__);
98 self->rx_flow = FLOW_STOP;
100 /* When we return error, TTP will need to requeue the skb */
108 * Function irda_disconnect_indication (instance, sap, reason, skb)
110 * Connection has been closed. Check reason to find out why
113 static void irda_disconnect_indication(void *instance, void *sap,
114 LM_REASON reason, struct sk_buff *skb)
116 struct irda_sock *self;
121 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
123 /* Don't care about it, but let's not leak it */
129 IRDA_DEBUG(0, "%s(%p) : BUG : sk is NULL\n",
134 /* 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_err = ECONNRESET;
138 sk->sk_shutdown |= SEND_SHUTDOWN;
140 sk->sk_state_change(sk);
141 /* Uh-oh... Should use sock_orphan ? */
142 sock_set_flag(sk, SOCK_DEAD);
145 * If we leave it open, IrLMP put it back into the list of
146 * unconnected LSAPs. The problem is that any incoming request
147 * can then be matched to this socket (and it will be, because
148 * it is at the head of the list). This would prevent any
149 * listening socket waiting on the same TSAP to get those
150 * requests. Some apps forget to close sockets, or hang to it
151 * a bit too long, so we may stay in this dead state long
152 * enough to be noticed...
153 * Note : all socket function do check sk->sk_state, so we are
158 irttp_close_tsap(self->tsap);
163 /* Note : once we are there, there is not much you want to do
164 * with the socket anymore, apart from closing it.
165 * For example, bind() and connect() won't reset sk->sk_err,
166 * sk->sk_shutdown and sk->sk_flags to valid values...
172 * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb)
174 * Connections has been confirmed by the remote device
177 static void irda_connect_confirm(void *instance, void *sap,
178 struct qos_info *qos,
179 __u32 max_sdu_size, __u8 max_header_size,
182 struct irda_sock *self;
187 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
196 // Should be ??? skb_queue_tail(&sk->sk_receive_queue, skb);
198 /* How much header space do we need to reserve */
199 self->max_header_size = max_header_size;
201 /* IrTTP max SDU size in transmit direction */
202 self->max_sdu_size_tx = max_sdu_size;
204 /* Find out what the largest chunk of data that we can transmit is */
205 switch (sk->sk_type) {
207 if (max_sdu_size != 0) {
208 IRDA_ERROR("%s: max_sdu_size must be 0\n",
212 self->max_data_size = irttp_get_max_seg_size(self->tsap);
215 if (max_sdu_size == 0) {
216 IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
220 self->max_data_size = max_sdu_size;
223 self->max_data_size = irttp_get_max_seg_size(self->tsap);
226 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __FUNCTION__,
227 self->max_data_size);
229 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
231 /* We are now connected! */
232 sk->sk_state = TCP_ESTABLISHED;
233 sk->sk_state_change(sk);
237 * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata)
239 * Incoming connection
242 static void irda_connect_indication(void *instance, void *sap,
243 struct qos_info *qos, __u32 max_sdu_size,
244 __u8 max_header_size, struct sk_buff *skb)
246 struct irda_sock *self;
251 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
259 /* How much header space do we need to reserve */
260 self->max_header_size = max_header_size;
262 /* IrTTP max SDU size in transmit direction */
263 self->max_sdu_size_tx = max_sdu_size;
265 /* Find out what the largest chunk of data that we can transmit is */
266 switch (sk->sk_type) {
268 if (max_sdu_size != 0) {
269 IRDA_ERROR("%s: max_sdu_size must be 0\n",
274 self->max_data_size = irttp_get_max_seg_size(self->tsap);
277 if (max_sdu_size == 0) {
278 IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
283 self->max_data_size = max_sdu_size;
286 self->max_data_size = irttp_get_max_seg_size(self->tsap);
289 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __FUNCTION__,
290 self->max_data_size);
292 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
294 skb_queue_tail(&sk->sk_receive_queue, skb);
295 sk->sk_state_change(sk);
299 * Function irda_connect_response (handle)
301 * Accept incoming connection
304 static void irda_connect_response(struct irda_sock *self)
308 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
310 IRDA_ASSERT(self != NULL, return;);
312 skb = dev_alloc_skb(64);
314 IRDA_DEBUG(0, "%s() Unable to allocate sk_buff!\n",
319 /* Reserve space for MUX_CONTROL and LAP header */
320 skb_reserve(skb, IRDA_MAX_HEADER);
322 irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
326 * Function irda_flow_indication (instance, sap, flow)
328 * Used by TinyTP to tell us if it can accept more data or not
331 static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
333 struct irda_sock *self;
336 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
340 IRDA_ASSERT(sk != NULL, return;);
344 IRDA_DEBUG(1, "%s(), IrTTP wants us to slow down\n",
346 self->tx_flow = flow;
349 self->tx_flow = flow;
350 IRDA_DEBUG(1, "%s(), IrTTP wants us to start again\n",
352 wake_up_interruptible(sk->sk_sleep);
355 IRDA_DEBUG(0, "%s(), Unknown flow command!\n", __FUNCTION__);
356 /* Unknown flow command, better stop */
357 self->tx_flow = flow;
363 * Function irda_getvalue_confirm (obj_id, value, priv)
365 * Got answer from remote LM-IAS, just pass object to requester...
367 * Note : duplicate from above, but we need our own version that
368 * doesn't touch the dtsap_sel and save the full value structure...
370 static void irda_getvalue_confirm(int result, __u16 obj_id,
371 struct ias_value *value, void *priv)
373 struct irda_sock *self;
375 self = (struct irda_sock *) priv;
377 IRDA_WARNING("%s: lost myself!\n", __FUNCTION__);
381 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
383 /* We probably don't need to make any more queries */
384 iriap_close(self->iriap);
387 /* Check if request succeeded */
388 if (result != IAS_SUCCESS) {
389 IRDA_DEBUG(1, "%s(), IAS query failed! (%d)\n", __FUNCTION__,
392 self->errno = result; /* We really need it later */
394 /* Wake up any processes waiting for result */
395 wake_up_interruptible(&self->query_wait);
400 /* Pass the object to the caller (so the caller must delete it) */
401 self->ias_result = value;
404 /* Wake up any processes waiting for result */
405 wake_up_interruptible(&self->query_wait);
409 * Function irda_selective_discovery_indication (discovery)
411 * Got a selective discovery indication from IrLMP.
413 * IrLMP is telling us that this node is new and matching our hint bit
414 * filter. Wake up any process waiting for answer...
416 static void irda_selective_discovery_indication(discinfo_t *discovery,
420 struct irda_sock *self;
422 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
424 self = (struct irda_sock *) priv;
426 IRDA_WARNING("%s: lost myself!\n", __FUNCTION__);
430 /* Pass parameter to the caller */
431 self->cachedaddr = discovery->daddr;
433 /* Wake up process if its waiting for device to be discovered */
434 wake_up_interruptible(&self->query_wait);
438 * Function irda_discovery_timeout (priv)
440 * Timeout in the selective discovery process
442 * We were waiting for a node to be discovered, but nothing has come up
443 * so far. Wake up the user and tell him that we failed...
445 static void irda_discovery_timeout(u_long priv)
447 struct irda_sock *self;
449 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
451 self = (struct irda_sock *) priv;
452 IRDA_ASSERT(self != NULL, return;);
454 /* Nothing for the caller */
455 self->cachelog = NULL;
456 self->cachedaddr = 0;
457 self->errno = -ETIME;
459 /* Wake up process if its still waiting... */
460 wake_up_interruptible(&self->query_wait);
464 * Function irda_open_tsap (self)
466 * Open local Transport Service Access Point (TSAP)
469 static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
474 IRDA_WARNING("%s: busy!\n", __FUNCTION__);
478 /* Initialize callbacks to be used by the IrDA stack */
479 irda_notify_init(¬ify);
480 notify.connect_confirm = irda_connect_confirm;
481 notify.connect_indication = irda_connect_indication;
482 notify.disconnect_indication = irda_disconnect_indication;
483 notify.data_indication = irda_data_indication;
484 notify.udata_indication = irda_data_indication;
485 notify.flow_indication = irda_flow_indication;
486 notify.instance = self;
487 strncpy(notify.name, name, NOTIFY_MAX_NAME);
489 self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
491 if (self->tsap == NULL) {
492 IRDA_DEBUG(0, "%s(), Unable to allocate TSAP!\n",
496 /* Remember which TSAP selector we actually got */
497 self->stsap_sel = self->tsap->stsap_sel;
503 * Function irda_open_lsap (self)
505 * Open local Link Service Access Point (LSAP). Used for opening Ultra
508 #ifdef CONFIG_IRDA_ULTRA
509 static int irda_open_lsap(struct irda_sock *self, int pid)
514 IRDA_WARNING("%s(), busy!\n", __FUNCTION__);
518 /* Initialize callbacks to be used by the IrDA stack */
519 irda_notify_init(¬ify);
520 notify.udata_indication = irda_data_indication;
521 notify.instance = self;
522 strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
524 self->lsap = irlmp_open_lsap(LSAP_CONNLESS, ¬ify, pid);
525 if (self->lsap == NULL) {
526 IRDA_DEBUG( 0, "%s(), Unable to allocate LSAP!\n", __FUNCTION__);
532 #endif /* CONFIG_IRDA_ULTRA */
535 * Function irda_find_lsap_sel (self, name)
537 * Try to lookup LSAP selector in remote LM-IAS
539 * Basically, we start a IAP query, and then go to sleep. When the query
540 * return, irda_getvalue_confirm will wake us up, and we can examine the
541 * result of the query...
542 * Note that in some case, the query fail even before we go to sleep,
543 * creating some races...
545 static int irda_find_lsap_sel(struct irda_sock *self, char *name)
547 IRDA_DEBUG(2, "%s(%p, %s)\n", __FUNCTION__, self, name);
549 IRDA_ASSERT(self != NULL, return -1;);
552 IRDA_WARNING("%s(): busy with a previous query\n",
557 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
558 irda_getvalue_confirm);
559 if(self->iriap == NULL)
562 /* Treat unexpected wakeup as disconnect */
563 self->errno = -EHOSTUNREACH;
565 /* Query remote LM-IAS */
566 iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
567 name, "IrDA:TinyTP:LsapSel");
569 /* Wait for answer, if not yet finished (or failed) */
570 if (wait_event_interruptible(self->query_wait, (self->iriap==NULL)))
571 /* Treat signals as disconnect */
572 return -EHOSTUNREACH;
574 /* Check what happened */
577 /* Requested object/attribute doesn't exist */
578 if((self->errno == IAS_CLASS_UNKNOWN) ||
579 (self->errno == IAS_ATTRIB_UNKNOWN))
580 return (-EADDRNOTAVAIL);
582 return (-EHOSTUNREACH);
585 /* Get the remote TSAP selector */
586 switch (self->ias_result->type) {
588 IRDA_DEBUG(4, "%s() int=%d\n",
589 __FUNCTION__, self->ias_result->t.integer);
591 if (self->ias_result->t.integer != -1)
592 self->dtsap_sel = self->ias_result->t.integer;
598 IRDA_DEBUG(0, "%s(), bad type!\n", __FUNCTION__);
601 if (self->ias_result)
602 irias_delete_value(self->ias_result);
607 return -EADDRNOTAVAIL;
611 * Function irda_discover_daddr_and_lsap_sel (self, name)
613 * This try to find a device with the requested service.
615 * It basically look into the discovery log. For each address in the list,
616 * it queries the LM-IAS of the device to find if this device offer
617 * the requested service.
618 * If there is more than one node supporting the service, we complain
619 * to the user (it should move devices around).
620 * The, we set both the destination address and the lsap selector to point
621 * on the service on the unique device we have found.
623 * Note : this function fails if there is more than one device in range,
624 * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
625 * Moreover, we would need to wait the LAP disconnection...
627 static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
629 discinfo_t *discoveries; /* Copy of the discovery log */
630 int number; /* Number of nodes in the log */
632 int err = -ENETUNREACH;
633 __u32 daddr = DEV_ADDR_ANY; /* Address we found the service on */
634 __u8 dtsap_sel = 0x0; /* TSAP associated with it */
636 IRDA_DEBUG(2, "%s(), name=%s\n", __FUNCTION__, name);
638 IRDA_ASSERT(self != NULL, return -1;);
640 /* Ask lmp for the current discovery log
641 * Note : we have to use irlmp_get_discoveries(), as opposed
642 * to play with the cachelog directly, because while we are
643 * making our ias query, le log might change... */
644 discoveries = irlmp_get_discoveries(&number, self->mask.word,
646 /* Check if the we got some results */
647 if (discoveries == NULL)
648 return -ENETUNREACH; /* No nodes discovered */
651 * Now, check all discovered devices (if any), and connect
652 * client only about the services that the client is
655 for(i = 0; i < number; i++) {
656 /* Try the address in the log */
657 self->daddr = discoveries[i].daddr;
659 IRDA_DEBUG(1, "%s(), trying daddr = %08x\n",
660 __FUNCTION__, self->daddr);
662 /* Query remote LM-IAS for this service */
663 err = irda_find_lsap_sel(self, name);
666 /* We found the requested service */
667 if(daddr != DEV_ADDR_ANY) {
668 IRDA_DEBUG(1, "%s(), discovered service ''%s'' in two different devices !!!\n",
670 self->daddr = DEV_ADDR_ANY;
674 /* First time we found that one, save it ! */
676 dtsap_sel = self->dtsap_sel;
679 /* Requested service simply doesn't exist on this node */
682 /* Something bad did happen :-( */
683 IRDA_DEBUG(0, "%s(), unexpected IAS query failure\n", __FUNCTION__);
684 self->daddr = DEV_ADDR_ANY;
686 return(-EHOSTUNREACH);
690 /* Cleanup our copy of the discovery log */
693 /* Check out what we found */
694 if(daddr == DEV_ADDR_ANY) {
695 IRDA_DEBUG(1, "%s(), cannot discover service ''%s'' in any device !!!\n",
697 self->daddr = DEV_ADDR_ANY;
698 return(-EADDRNOTAVAIL);
701 /* Revert back to discovered device & service */
704 self->dtsap_sel = dtsap_sel;
706 IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n",
707 __FUNCTION__, name, self->daddr);
713 * Function irda_getname (sock, uaddr, uaddr_len, peer)
715 * Return the our own, or peers socket address (sockaddr_irda)
718 static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
719 int *uaddr_len, int peer)
721 struct sockaddr_irda saddr;
722 struct sock *sk = sock->sk;
723 struct irda_sock *self = irda_sk(sk);
726 if (sk->sk_state != TCP_ESTABLISHED)
729 saddr.sir_family = AF_IRDA;
730 saddr.sir_lsap_sel = self->dtsap_sel;
731 saddr.sir_addr = self->daddr;
733 saddr.sir_family = AF_IRDA;
734 saddr.sir_lsap_sel = self->stsap_sel;
735 saddr.sir_addr = self->saddr;
738 IRDA_DEBUG(1, "%s(), tsap_sel = %#x\n", __FUNCTION__, saddr.sir_lsap_sel);
739 IRDA_DEBUG(1, "%s(), addr = %08x\n", __FUNCTION__, saddr.sir_addr);
741 /* uaddr_len come to us uninitialised */
742 *uaddr_len = sizeof (struct sockaddr_irda);
743 memcpy(uaddr, &saddr, *uaddr_len);
749 * Function irda_listen (sock, backlog)
751 * Just move to the listen state
754 static int irda_listen(struct socket *sock, int backlog)
756 struct sock *sk = sock->sk;
758 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
760 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
761 (sk->sk_type != SOCK_DGRAM))
764 if (sk->sk_state != TCP_LISTEN) {
765 sk->sk_max_ack_backlog = backlog;
766 sk->sk_state = TCP_LISTEN;
775 * Function irda_bind (sock, uaddr, addr_len)
777 * Used by servers to register their well known TSAP
780 static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
782 struct sock *sk = sock->sk;
783 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
784 struct irda_sock *self = irda_sk(sk);
787 IRDA_ASSERT(self != NULL, return -1;);
789 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
791 if (addr_len != sizeof(struct sockaddr_irda))
794 #ifdef CONFIG_IRDA_ULTRA
795 /* Special care for Ultra sockets */
796 if ((sk->sk_type == SOCK_DGRAM) &&
797 (sk->sk_protocol == IRDAPROTO_ULTRA)) {
798 self->pid = addr->sir_lsap_sel;
799 if (self->pid & 0x80) {
800 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __FUNCTION__);
803 err = irda_open_lsap(self, self->pid);
807 /* Pretend we are connected */
808 sock->state = SS_CONNECTED;
809 sk->sk_state = TCP_ESTABLISHED;
813 #endif /* CONFIG_IRDA_ULTRA */
815 err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
819 /* Register with LM-IAS */
820 self->ias_obj = irias_new_object(addr->sir_name, jiffies);
821 irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel",
822 self->stsap_sel, IAS_KERNEL_ATTR);
823 irias_insert_object(self->ias_obj);
829 * Function irda_accept (sock, newsock, flags)
831 * Wait for incoming connection
834 static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
836 struct sock *sk = sock->sk;
837 struct irda_sock *new, *self = irda_sk(sk);
842 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
844 IRDA_ASSERT(self != NULL, return -1;);
846 err = irda_create(newsock, sk->sk_protocol);
850 if (sock->state != SS_UNCONNECTED)
853 if ((sk = sock->sk) == NULL)
856 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
857 (sk->sk_type != SOCK_DGRAM))
860 if (sk->sk_state != TCP_LISTEN)
864 * The read queue this time is holding sockets ready to use
865 * hooked into the SABM we saved
869 * We can perform the accept only if there is incoming data
870 * on the listening socket.
871 * So, we will block the caller until we receive any data.
872 * If the caller was waiting on select() or poll() before
873 * calling us, the data is waiting for us ;-)
876 skb = skb_dequeue(&sk->sk_receive_queue);
879 DECLARE_WAITQUEUE(waitq, current);
881 /* Non blocking operation */
882 if (flags & O_NONBLOCK)
885 /* The following code is a cut'n'paste of the
886 * wait_event_interruptible() macro.
887 * We don't us the macro because the condition has
888 * side effects : we want to make sure that only one
889 * skb get dequeued - Jean II */
890 add_wait_queue(sk->sk_sleep, &waitq);
892 set_current_state(TASK_INTERRUPTIBLE);
893 skb = skb_dequeue(&sk->sk_receive_queue);
896 if (!signal_pending(current)) {
903 current->state = TASK_RUNNING;
904 remove_wait_queue(sk->sk_sleep, &waitq);
910 newsk->sk_state = TCP_ESTABLISHED;
912 new = irda_sk(newsk);
913 IRDA_ASSERT(new != NULL, return -1;);
915 /* Now attach up the new socket */
916 new->tsap = irttp_dup(self->tsap, new);
918 IRDA_DEBUG(0, "%s(), dup failed!\n", __FUNCTION__);
923 new->stsap_sel = new->tsap->stsap_sel;
924 new->dtsap_sel = new->tsap->dtsap_sel;
925 new->saddr = irttp_get_saddr(new->tsap);
926 new->daddr = irttp_get_daddr(new->tsap);
928 new->max_sdu_size_tx = self->max_sdu_size_tx;
929 new->max_sdu_size_rx = self->max_sdu_size_rx;
930 new->max_data_size = self->max_data_size;
931 new->max_header_size = self->max_header_size;
933 memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
935 /* Clean up the original one to keep it in listen state */
936 irttp_listen(self->tsap);
938 /* Wow ! What is that ? Jean II */
940 skb->destructor = NULL;
942 sk->sk_ack_backlog--;
944 newsock->state = SS_CONNECTED;
946 irda_connect_response(new);
952 * Function irda_connect (sock, uaddr, addr_len, flags)
954 * Connect to a IrDA device
956 * The main difference with a "standard" connect is that with IrDA we need
957 * to resolve the service name into a TSAP selector (in TCP, port number
958 * doesn't have to be resolved).
959 * Because of this service name resoltion, we can offer "auto-connect",
960 * where we connect to a service without specifying a destination address.
962 * Note : by consulting "errno", the user space caller may learn the cause
963 * of the failure. Most of them are visible in the function, others may come
964 * from subroutines called and are listed here :
965 * o EBUSY : already processing a connect
966 * o EHOSTUNREACH : bad addr->sir_addr argument
967 * o EADDRNOTAVAIL : bad addr->sir_name argument
968 * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
969 * o ENETUNREACH : no node found on the network (auto-connect)
971 static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
972 int addr_len, int flags)
974 struct sock *sk = sock->sk;
975 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
976 struct irda_sock *self = irda_sk(sk);
979 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
981 /* Don't allow connect for Ultra sockets */
982 if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
983 return -ESOCKTNOSUPPORT;
985 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
986 sock->state = SS_CONNECTED;
987 return 0; /* Connect completed during a ERESTARTSYS event */
990 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
991 sock->state = SS_UNCONNECTED;
992 return -ECONNREFUSED;
995 if (sk->sk_state == TCP_ESTABLISHED)
996 return -EISCONN; /* No reconnect on a seqpacket socket */
998 sk->sk_state = TCP_CLOSE;
999 sock->state = SS_UNCONNECTED;
1001 if (addr_len != sizeof(struct sockaddr_irda))
1004 /* Check if user supplied any destination device address */
1005 if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
1006 /* Try to find one suitable */
1007 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
1009 IRDA_DEBUG(0, "%s(), auto-connect failed!\n", __FUNCTION__);
1013 /* Use the one provided by the user */
1014 self->daddr = addr->sir_addr;
1015 IRDA_DEBUG(1, "%s(), daddr = %08x\n", __FUNCTION__, self->daddr);
1017 /* If we don't have a valid service name, we assume the
1018 * user want to connect on a specific LSAP. Prevent
1019 * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
1020 if((addr->sir_name[0] != '\0') ||
1021 (addr->sir_lsap_sel >= 0x70)) {
1022 /* Query remote LM-IAS using service name */
1023 err = irda_find_lsap_sel(self, addr->sir_name);
1025 IRDA_DEBUG(0, "%s(), connect failed!\n", __FUNCTION__);
1029 /* Directly connect to the remote LSAP
1030 * specified by the sir_lsap field.
1031 * Please use with caution, in IrDA LSAPs are
1032 * dynamic and there is no "well-known" LSAP. */
1033 self->dtsap_sel = addr->sir_lsap_sel;
1037 /* Check if we have opened a local TSAP */
1039 irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1041 /* Move to connecting socket, start sending Connect Requests */
1042 sock->state = SS_CONNECTING;
1043 sk->sk_state = TCP_SYN_SENT;
1045 /* Connect to remote device */
1046 err = irttp_connect_request(self->tsap, self->dtsap_sel,
1047 self->saddr, self->daddr, NULL,
1048 self->max_sdu_size_rx, NULL);
1050 IRDA_DEBUG(0, "%s(), connect failed!\n", __FUNCTION__);
1055 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1056 return -EINPROGRESS;
1058 if (wait_event_interruptible(*(sk->sk_sleep),
1059 (sk->sk_state != TCP_SYN_SENT)))
1060 return -ERESTARTSYS;
1062 if (sk->sk_state != TCP_ESTABLISHED) {
1063 sock->state = SS_UNCONNECTED;
1064 return sock_error(sk); /* Always set at this point */
1067 sock->state = SS_CONNECTED;
1069 /* At this point, IrLMP has assigned our source address */
1070 self->saddr = irttp_get_saddr(self->tsap);
1075 static struct proto irda_proto = {
1077 .owner = THIS_MODULE,
1078 .obj_size = sizeof(struct irda_sock),
1082 * Function irda_create (sock, protocol)
1084 * Create IrDA socket
1087 static int irda_create(struct socket *sock, int protocol)
1090 struct irda_sock *self;
1092 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
1094 /* Check for valid socket type */
1095 switch (sock->type) {
1096 case SOCK_STREAM: /* For TTP connections with SAR disabled */
1097 case SOCK_SEQPACKET: /* For TTP connections with SAR enabled */
1098 case SOCK_DGRAM: /* For TTP Unitdata or LMP Ultra transfers */
1101 return -ESOCKTNOSUPPORT;
1104 /* Allocate networking socket */
1105 sk = sk_alloc(PF_IRDA, GFP_ATOMIC, &irda_proto, 1);
1110 IRDA_DEBUG(2, "%s() : self is %p\n", __FUNCTION__, self);
1112 init_waitqueue_head(&self->query_wait);
1114 /* Initialise networking socket struct */
1115 sock_init_data(sock, sk); /* Note : set sk->sk_refcnt to 1 */
1116 sk->sk_family = PF_IRDA;
1117 sk->sk_protocol = protocol;
1119 switch (sock->type) {
1121 sock->ops = &irda_stream_ops;
1122 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1124 case SOCK_SEQPACKET:
1125 sock->ops = &irda_seqpacket_ops;
1126 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1130 #ifdef CONFIG_IRDA_ULTRA
1131 case IRDAPROTO_ULTRA:
1132 sock->ops = &irda_ultra_ops;
1133 /* Initialise now, because we may send on unbound
1134 * sockets. Jean II */
1135 self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1136 self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1138 #endif /* CONFIG_IRDA_ULTRA */
1139 case IRDAPROTO_UNITDATA:
1140 sock->ops = &irda_dgram_ops;
1141 /* We let Unitdata conn. be like seqpack conn. */
1142 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1145 IRDA_ERROR("%s: protocol not supported!\n",
1147 return -ESOCKTNOSUPPORT;
1151 return -ESOCKTNOSUPPORT;
1154 /* Register as a client with IrLMP */
1155 self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1156 self->mask.word = 0xffff;
1157 self->rx_flow = self->tx_flow = FLOW_START;
1158 self->nslots = DISCOVERY_DEFAULT_SLOTS;
1159 self->daddr = DEV_ADDR_ANY; /* Until we get connected */
1160 self->saddr = 0x0; /* so IrLMP assign us any link */
1165 * Function irda_destroy_socket (self)
1170 static void irda_destroy_socket(struct irda_sock *self)
1172 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
1174 IRDA_ASSERT(self != NULL, return;);
1176 /* Unregister with IrLMP */
1177 irlmp_unregister_client(self->ckey);
1178 irlmp_unregister_service(self->skey);
1180 /* Unregister with LM-IAS */
1181 if (self->ias_obj) {
1182 irias_delete_object(self->ias_obj);
1183 self->ias_obj = NULL;
1187 iriap_close(self->iriap);
1192 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1193 irttp_close_tsap(self->tsap);
1196 #ifdef CONFIG_IRDA_ULTRA
1198 irlmp_close_lsap(self->lsap);
1201 #endif /* CONFIG_IRDA_ULTRA */
1205 * Function irda_release (sock)
1207 static int irda_release(struct socket *sock)
1209 struct sock *sk = sock->sk;
1211 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
1216 sk->sk_state = TCP_CLOSE;
1217 sk->sk_shutdown |= SEND_SHUTDOWN;
1218 sk->sk_state_change(sk);
1220 /* Destroy IrDA socket */
1221 irda_destroy_socket(irda_sk(sk));
1226 /* Purge queues (see sock_init_data()) */
1227 skb_queue_purge(&sk->sk_receive_queue);
1229 /* Destroy networking socket if we are the last reference on it,
1230 * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1233 /* Notes on socket locking and deallocation... - Jean II
1234 * In theory we should put pairs of sock_hold() / sock_put() to
1235 * prevent the socket to be destroyed whenever there is an
1236 * outstanding request or outstanding incoming packet or event.
1238 * 1) This may include IAS request, both in connect and getsockopt.
1239 * Unfortunately, the situation is a bit more messy than it looks,
1240 * because we close iriap and kfree(self) above.
1242 * 2) This may include selective discovery in getsockopt.
1243 * Same stuff as above, irlmp registration and self are gone.
1245 * Probably 1 and 2 may not matter, because it's all triggered
1246 * by a process and the socket layer already prevent the
1247 * socket to go away while a process is holding it, through
1248 * sockfd_put() and fput()...
1250 * 3) This may include deferred TSAP closure. In particular,
1251 * we may receive a late irda_disconnect_indication()
1252 * Fortunately, (tsap_cb *)->close_pend should protect us
1255 * I did some testing on SMP, and it looks solid. And the socket
1256 * memory leak is now gone... - Jean II
1263 * Function irda_sendmsg (iocb, sock, msg, len)
1265 * Send message down to TinyTP. This function is used for both STREAM and
1266 * SEQPACK services. This is possible since it forces the client to
1267 * fragment the message if necessary
1269 static int irda_sendmsg(struct kiocb *iocb, struct socket *sock,
1270 struct msghdr *msg, size_t len)
1272 struct sock *sk = sock->sk;
1273 struct irda_sock *self;
1274 struct sk_buff *skb;
1275 unsigned char *asmptr;
1278 IRDA_DEBUG(4, "%s(), len=%zd\n", __FUNCTION__, len);
1280 /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1281 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1284 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1285 send_sig(SIGPIPE, current, 0);
1289 if (sk->sk_state != TCP_ESTABLISHED)
1293 IRDA_ASSERT(self != NULL, return -1;);
1295 /* Check if IrTTP is wants us to slow down */
1297 if (wait_event_interruptible(*(sk->sk_sleep),
1298 (self->tx_flow != FLOW_STOP || sk->sk_state != TCP_ESTABLISHED)))
1299 return -ERESTARTSYS;
1301 /* Check if we are still connected */
1302 if (sk->sk_state != TCP_ESTABLISHED)
1305 /* Check that we don't send out too big frames */
1306 if (len > self->max_data_size) {
1307 IRDA_DEBUG(2, "%s(), Chopping frame from %zd to %d bytes!\n",
1308 __FUNCTION__, len, self->max_data_size);
1309 len = self->max_data_size;
1312 skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
1313 msg->msg_flags & MSG_DONTWAIT, &err);
1317 skb_reserve(skb, self->max_header_size + 16);
1319 asmptr = skb->h.raw = skb_put(skb, len);
1320 err = memcpy_fromiovec(asmptr, msg->msg_iov, len);
1327 * Just send the message to TinyTP, and let it deal with possible
1328 * errors. No need to duplicate all that here
1330 err = irttp_data_request(self->tsap, skb);
1332 IRDA_DEBUG(0, "%s(), err=%d\n", __FUNCTION__, err);
1335 /* Tell client how much data we actually sent */
1340 * Function irda_recvmsg_dgram (iocb, sock, msg, size, flags)
1342 * Try to receive message and copy it to user. The frame is discarded
1343 * after being read, regardless of how much the user actually read
1345 static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock,
1346 struct msghdr *msg, size_t size, int flags)
1348 struct sock *sk = sock->sk;
1349 struct irda_sock *self = irda_sk(sk);
1350 struct sk_buff *skb;
1354 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
1356 IRDA_ASSERT(self != NULL, return -1;);
1358 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1359 flags & MSG_DONTWAIT, &err);
1363 skb->h.raw = skb->data;
1366 if (copied > size) {
1367 IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n",
1368 __FUNCTION__, copied, size);
1370 msg->msg_flags |= MSG_TRUNC;
1372 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1374 skb_free_datagram(sk, skb);
1377 * Check if we have previously stopped IrTTP and we know
1378 * have more free space in our rx_queue. If so tell IrTTP
1379 * to start delivering frames again before our rx_queue gets
1382 if (self->rx_flow == FLOW_STOP) {
1383 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1384 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __FUNCTION__);
1385 self->rx_flow = FLOW_START;
1386 irttp_flow_request(self->tsap, FLOW_START);
1394 * Function irda_recvmsg_stream (iocb, sock, msg, size, flags)
1396 static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
1397 struct msghdr *msg, size_t size, int flags)
1399 struct sock *sk = sock->sk;
1400 struct irda_sock *self = irda_sk(sk);
1401 int noblock = flags & MSG_DONTWAIT;
1404 DECLARE_WAITQUEUE(waitq, current);
1406 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
1408 IRDA_ASSERT(self != NULL, return -1;);
1410 if (sock->flags & __SO_ACCEPTCON)
1413 if (flags & MSG_OOB)
1416 if (flags & MSG_WAITALL)
1419 msg->msg_namelen = 0;
1423 struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1428 if (copied >= target)
1431 /* The following code is a cut'n'paste of the
1432 * wait_event_interruptible() macro.
1433 * We don't us the macro because the test condition
1434 * is messy. - Jean II */
1435 set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
1436 add_wait_queue(sk->sk_sleep, &waitq);
1437 set_current_state(TASK_INTERRUPTIBLE);
1440 * POSIX 1003.1g mandates this order.
1442 ret = sock_error(sk);
1445 else if (sk->sk_shutdown & RCV_SHUTDOWN)
1449 else if (signal_pending(current))
1451 else if (skb_peek(&sk->sk_receive_queue) == NULL)
1452 /* Wait process until data arrives */
1455 current->state = TASK_RUNNING;
1456 remove_wait_queue(sk->sk_sleep, &waitq);
1457 clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
1461 if (sk->sk_shutdown & RCV_SHUTDOWN)
1467 chunk = min_t(unsigned int, skb->len, size);
1468 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1469 skb_queue_head(&sk->sk_receive_queue, skb);
1477 /* Mark read part of skb as used */
1478 if (!(flags & MSG_PEEK)) {
1479 skb_pull(skb, chunk);
1481 /* put the skb back if we didn't use it up.. */
1483 IRDA_DEBUG(1, "%s(), back on q!\n",
1485 skb_queue_head(&sk->sk_receive_queue, skb);
1491 IRDA_DEBUG(0, "%s() questionable!?\n", __FUNCTION__);
1493 /* put message back and return */
1494 skb_queue_head(&sk->sk_receive_queue, skb);
1500 * Check if we have previously stopped IrTTP and we know
1501 * have more free space in our rx_queue. If so tell IrTTP
1502 * to start delivering frames again before our rx_queue gets
1505 if (self->rx_flow == FLOW_STOP) {
1506 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1507 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __FUNCTION__);
1508 self->rx_flow = FLOW_START;
1509 irttp_flow_request(self->tsap, FLOW_START);
1517 * Function irda_sendmsg_dgram (iocb, sock, msg, len)
1519 * Send message down to TinyTP for the unreliable sequenced
1523 static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock,
1524 struct msghdr *msg, size_t len)
1526 struct sock *sk = sock->sk;
1527 struct irda_sock *self;
1528 struct sk_buff *skb;
1529 unsigned char *asmptr;
1532 IRDA_DEBUG(4, "%s(), len=%zd\n", __FUNCTION__, len);
1534 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1537 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1538 send_sig(SIGPIPE, current, 0);
1542 if (sk->sk_state != TCP_ESTABLISHED)
1546 IRDA_ASSERT(self != NULL, return -1;);
1549 * Check that we don't send out too big frames. This is an unreliable
1550 * service, so we have no fragmentation and no coalescence
1552 if (len > self->max_data_size) {
1553 IRDA_DEBUG(0, "%s(), Warning to much data! "
1554 "Chopping frame from %zd to %d bytes!\n",
1555 __FUNCTION__, len, self->max_data_size);
1556 len = self->max_data_size;
1559 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1560 msg->msg_flags & MSG_DONTWAIT, &err);
1564 skb_reserve(skb, self->max_header_size);
1566 IRDA_DEBUG(4, "%s(), appending user data\n", __FUNCTION__);
1567 asmptr = skb->h.raw = skb_put(skb, len);
1568 err = memcpy_fromiovec(asmptr, msg->msg_iov, len);
1575 * Just send the message to TinyTP, and let it deal with possible
1576 * errors. No need to duplicate all that here
1578 err = irttp_udata_request(self->tsap, skb);
1580 IRDA_DEBUG(0, "%s(), err=%d\n", __FUNCTION__, err);
1587 * Function irda_sendmsg_ultra (iocb, sock, msg, len)
1589 * Send message down to IrLMP for the unreliable Ultra
1592 #ifdef CONFIG_IRDA_ULTRA
1593 static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock,
1594 struct msghdr *msg, size_t len)
1596 struct sock *sk = sock->sk;
1597 struct irda_sock *self;
1600 struct sk_buff *skb;
1601 unsigned char *asmptr;
1604 IRDA_DEBUG(4, "%s(), len=%zd\n", __FUNCTION__, len);
1606 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1609 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1610 send_sig(SIGPIPE, current, 0);
1615 IRDA_ASSERT(self != NULL, return -1;);
1617 /* Check if an address was specified with sendto. Jean II */
1618 if (msg->msg_name) {
1619 struct sockaddr_irda *addr = (struct sockaddr_irda *) msg->msg_name;
1620 /* Check address, extract pid. Jean II */
1621 if (msg->msg_namelen < sizeof(*addr))
1623 if (addr->sir_family != AF_IRDA)
1626 pid = addr->sir_lsap_sel;
1628 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __FUNCTION__);
1632 /* Check that the socket is properly bound to an Ultra
1634 if ((self->lsap == NULL) ||
1635 (sk->sk_state != TCP_ESTABLISHED)) {
1636 IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n",
1640 /* Use PID from socket */
1645 * Check that we don't send out too big frames. This is an unreliable
1646 * service, so we have no fragmentation and no coalescence
1648 if (len > self->max_data_size) {
1649 IRDA_DEBUG(0, "%s(), Warning to much data! "
1650 "Chopping frame from %zd to %d bytes!\n",
1651 __FUNCTION__, len, self->max_data_size);
1652 len = self->max_data_size;
1655 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1656 msg->msg_flags & MSG_DONTWAIT, &err);
1660 skb_reserve(skb, self->max_header_size);
1662 IRDA_DEBUG(4, "%s(), appending user data\n", __FUNCTION__);
1663 asmptr = skb->h.raw = skb_put(skb, len);
1664 err = memcpy_fromiovec(asmptr, msg->msg_iov, len);
1670 err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1673 IRDA_DEBUG(0, "%s(), err=%d\n", __FUNCTION__, err);
1678 #endif /* CONFIG_IRDA_ULTRA */
1681 * Function irda_shutdown (sk, how)
1683 static int irda_shutdown(struct socket *sock, int how)
1685 struct sock *sk = sock->sk;
1686 struct irda_sock *self = irda_sk(sk);
1688 IRDA_ASSERT(self != NULL, return -1;);
1690 IRDA_DEBUG(1, "%s(%p)\n", __FUNCTION__, self);
1692 sk->sk_state = TCP_CLOSE;
1693 sk->sk_shutdown |= SEND_SHUTDOWN;
1694 sk->sk_state_change(sk);
1697 iriap_close(self->iriap);
1702 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1703 irttp_close_tsap(self->tsap);
1707 /* A few cleanup so the socket look as good as new... */
1708 self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */
1709 self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */
1710 self->saddr = 0x0; /* so IrLMP assign us any link */
1716 * Function irda_poll (file, sock, wait)
1718 static unsigned int irda_poll(struct file * file, struct socket *sock,
1721 struct sock *sk = sock->sk;
1722 struct irda_sock *self = irda_sk(sk);
1725 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
1727 poll_wait(file, sk->sk_sleep, wait);
1730 /* Exceptional events? */
1733 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1734 IRDA_DEBUG(0, "%s(), POLLHUP\n", __FUNCTION__);
1739 if (!skb_queue_empty(&sk->sk_receive_queue)) {
1740 IRDA_DEBUG(4, "Socket is readable\n");
1741 mask |= POLLIN | POLLRDNORM;
1744 /* Connection-based need to check for termination and startup */
1745 switch (sk->sk_type) {
1747 if (sk->sk_state == TCP_CLOSE) {
1748 IRDA_DEBUG(0, "%s(), POLLHUP\n", __FUNCTION__);
1752 if (sk->sk_state == TCP_ESTABLISHED) {
1753 if ((self->tx_flow == FLOW_START) &&
1756 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1760 case SOCK_SEQPACKET:
1761 if ((self->tx_flow == FLOW_START) &&
1764 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1768 if (sock_writeable(sk))
1769 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1778 * Function irda_ioctl (sock, cmd, arg)
1780 static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1782 struct sock *sk = sock->sk;
1784 IRDA_DEBUG(4, "%s(), cmd=%#x\n", __FUNCTION__, cmd);
1789 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1792 if (put_user(amount, (unsigned int __user *)arg))
1798 struct sk_buff *skb;
1800 /* These two are safe on a single CPU system as only user tasks fiddle here */
1801 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1803 if (put_user(amount, (unsigned int __user *)arg))
1810 return sock_get_timestamp(sk, (struct timeval __user *)arg);
1815 case SIOCGIFDSTADDR:
1816 case SIOCSIFDSTADDR:
1817 case SIOCGIFBRDADDR:
1818 case SIOCSIFBRDADDR:
1819 case SIOCGIFNETMASK:
1820 case SIOCSIFNETMASK:
1825 IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __FUNCTION__);
1826 return -ENOIOCTLCMD;
1833 #ifdef CONFIG_COMPAT
1835 * Function irda_ioctl (sock, cmd, arg)
1837 static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1840 * All IRDA's ioctl are standard ones.
1842 return -ENOIOCTLCMD;
1847 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1849 * Set some options for the socket
1852 static int irda_setsockopt(struct socket *sock, int level, int optname,
1853 char __user *optval, int optlen)
1855 struct sock *sk = sock->sk;
1856 struct irda_sock *self = irda_sk(sk);
1857 struct irda_ias_set *ias_opt;
1858 struct ias_object *ias_obj;
1859 struct ias_attrib * ias_attr; /* Attribute in IAS object */
1862 IRDA_ASSERT(self != NULL, return -1;);
1864 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
1866 if (level != SOL_IRLMP)
1867 return -ENOPROTOOPT;
1871 /* The user want to add an attribute to an existing IAS object
1872 * (in the IAS database) or to create a new object with this
1874 * We first query IAS to know if the object exist, and then
1875 * create the right attribute...
1878 if (optlen != sizeof(struct irda_ias_set))
1881 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1882 if (ias_opt == NULL)
1885 /* Copy query to the driver. */
1886 if (copy_from_user(ias_opt, optval, optlen)) {
1891 /* Find the object we target.
1892 * If the user gives us an empty string, we use the object
1893 * associated with this socket. This will workaround
1894 * duplicated class name - Jean II */
1895 if(ias_opt->irda_class_name[0] == '\0') {
1896 if(self->ias_obj == NULL) {
1900 ias_obj = self->ias_obj;
1902 ias_obj = irias_find_object(ias_opt->irda_class_name);
1904 /* Only ROOT can mess with the global IAS database.
1905 * Users can only add attributes to the object associated
1906 * with the socket they own - Jean II */
1907 if((!capable(CAP_NET_ADMIN)) &&
1908 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1913 /* If the object doesn't exist, create it */
1914 if(ias_obj == (struct ias_object *) NULL) {
1915 /* Create a new object */
1916 ias_obj = irias_new_object(ias_opt->irda_class_name,
1920 /* Do we have the attribute already ? */
1921 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1926 /* Look at the type */
1927 switch(ias_opt->irda_attrib_type) {
1929 /* Add an integer attribute */
1930 irias_add_integer_attrib(
1932 ias_opt->irda_attrib_name,
1933 ias_opt->attribute.irda_attrib_int,
1938 if(ias_opt->attribute.irda_attrib_octet_seq.len >
1939 IAS_MAX_OCTET_STRING) {
1943 /* Add an octet sequence attribute */
1944 irias_add_octseq_attrib(
1946 ias_opt->irda_attrib_name,
1947 ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
1948 ias_opt->attribute.irda_attrib_octet_seq.len,
1952 /* Should check charset & co */
1954 /* The length is encoded in a __u8, and
1955 * IAS_MAX_STRING == 256, so there is no way
1956 * userspace can pass us a string too large.
1958 /* NULL terminate the string (avoid troubles) */
1959 ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
1960 /* Add a string attribute */
1961 irias_add_string_attrib(
1963 ias_opt->irda_attrib_name,
1964 ias_opt->attribute.irda_attrib_string.string,
1971 irias_insert_object(ias_obj);
1975 /* The user want to delete an object from our local IAS
1976 * database. We just need to query the IAS, check is the
1977 * object is not owned by the kernel and delete it.
1980 if (optlen != sizeof(struct irda_ias_set))
1983 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1984 if (ias_opt == NULL)
1987 /* Copy query to the driver. */
1988 if (copy_from_user(ias_opt, optval, optlen)) {
1993 /* Find the object we target.
1994 * If the user gives us an empty string, we use the object
1995 * associated with this socket. This will workaround
1996 * duplicated class name - Jean II */
1997 if(ias_opt->irda_class_name[0] == '\0')
1998 ias_obj = self->ias_obj;
2000 ias_obj = irias_find_object(ias_opt->irda_class_name);
2001 if(ias_obj == (struct ias_object *) NULL) {
2006 /* Only ROOT can mess with the global IAS database.
2007 * Users can only del attributes from the object associated
2008 * with the socket they own - Jean II */
2009 if((!capable(CAP_NET_ADMIN)) &&
2010 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2015 /* Find the attribute (in the object) we target */
2016 ias_attr = irias_find_attrib(ias_obj,
2017 ias_opt->irda_attrib_name);
2018 if(ias_attr == (struct ias_attrib *) NULL) {
2023 /* Check is the user space own the object */
2024 if(ias_attr->value->owner != IAS_USER_ATTR) {
2025 IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __FUNCTION__);
2030 /* Remove the attribute (and maybe the object) */
2031 irias_delete_attrib(ias_obj, ias_attr, 1);
2034 case IRLMP_MAX_SDU_SIZE:
2035 if (optlen < sizeof(int))
2038 if (get_user(opt, (int __user *)optval))
2041 /* Only possible for a seqpacket service (TTP with SAR) */
2042 if (sk->sk_type != SOCK_SEQPACKET) {
2043 IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n",
2045 self->max_sdu_size_rx = opt;
2047 IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2049 return -ENOPROTOOPT;
2052 case IRLMP_HINTS_SET:
2053 if (optlen < sizeof(int))
2056 /* The input is really a (__u8 hints[2]), easier as an int */
2057 if (get_user(opt, (int __user *)optval))
2060 /* Unregister any old registration */
2062 irlmp_unregister_service(self->skey);
2064 self->skey = irlmp_register_service((__u16) opt);
2066 case IRLMP_HINT_MASK_SET:
2067 /* As opposed to the previous case which set the hint bits
2068 * that we advertise, this one set the filter we use when
2069 * making a discovery (nodes which don't match any hint
2070 * bit in the mask are not reported).
2072 if (optlen < sizeof(int))
2075 /* The input is really a (__u8 hints[2]), easier as an int */
2076 if (get_user(opt, (int __user *)optval))
2079 /* Set the new hint mask */
2080 self->mask.word = (__u16) opt;
2081 /* Mask out extension bits */
2082 self->mask.word &= 0x7f7f;
2083 /* Check if no bits */
2084 if(!self->mask.word)
2085 self->mask.word = 0xFFFF;
2089 return -ENOPROTOOPT;
2095 * Function irda_extract_ias_value(ias_opt, ias_value)
2097 * Translate internal IAS value structure to the user space representation
2099 * The external representation of IAS values, as we exchange them with
2100 * user space program is quite different from the internal representation,
2101 * as stored in the IAS database (because we need a flat structure for
2102 * crossing kernel boundary).
2103 * This function transform the former in the latter. We also check
2104 * that the value type is valid.
2106 static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2107 struct ias_value *ias_value)
2109 /* Look at the type */
2110 switch (ias_value->type) {
2112 /* Copy the integer */
2113 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2117 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2119 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2120 ias_value->t.oct_seq, ias_value->len);
2124 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2125 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2127 memcpy(ias_opt->attribute.irda_attrib_string.string,
2128 ias_value->t.string, ias_value->len);
2129 /* NULL terminate the string (avoid troubles) */
2130 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2137 /* Copy type over */
2138 ias_opt->irda_attrib_type = ias_value->type;
2144 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2146 static int irda_getsockopt(struct socket *sock, int level, int optname,
2147 char __user *optval, int __user *optlen)
2149 struct sock *sk = sock->sk;
2150 struct irda_sock *self = irda_sk(sk);
2151 struct irda_device_list list;
2152 struct irda_device_info *discoveries;
2153 struct irda_ias_set * ias_opt; /* IAS get/query params */
2154 struct ias_object * ias_obj; /* Object in IAS */
2155 struct ias_attrib * ias_attr; /* Attribute in IAS object */
2156 int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */
2162 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
2164 if (level != SOL_IRLMP)
2165 return -ENOPROTOOPT;
2167 if (get_user(len, optlen))
2174 case IRLMP_ENUMDEVICES:
2175 /* Ask lmp for the current discovery log */
2176 discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2178 /* Check if the we got some results */
2179 if (discoveries == NULL)
2180 return -EAGAIN; /* Didn't find any devices */
2183 /* Write total list length back to client */
2184 if (copy_to_user(optval, &list,
2185 sizeof(struct irda_device_list) -
2186 sizeof(struct irda_device_info)))
2189 /* Offset to first device entry */
2190 offset = sizeof(struct irda_device_list) -
2191 sizeof(struct irda_device_info);
2193 /* Copy the list itself - watch for overflow */
2199 total = offset + (list.len * sizeof(struct irda_device_info));
2202 if (copy_to_user(optval+offset, discoveries, total - offset))
2205 /* Write total number of bytes used back to client */
2206 if (put_user(total, optlen))
2209 /* Free up our buffer */
2214 case IRLMP_MAX_SDU_SIZE:
2215 val = self->max_data_size;
2217 if (put_user(len, optlen))
2220 if (copy_to_user(optval, &val, len))
2224 /* The user want an object from our local IAS database.
2225 * We just need to query the IAS and return the value
2228 /* Check that the user has allocated the right space for us */
2229 if (len != sizeof(struct irda_ias_set))
2232 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2233 if (ias_opt == NULL)
2236 /* Copy query to the driver. */
2237 if (copy_from_user(ias_opt, optval, len)) {
2242 /* Find the object we target.
2243 * If the user gives us an empty string, we use the object
2244 * associated with this socket. This will workaround
2245 * duplicated class name - Jean II */
2246 if(ias_opt->irda_class_name[0] == '\0')
2247 ias_obj = self->ias_obj;
2249 ias_obj = irias_find_object(ias_opt->irda_class_name);
2250 if(ias_obj == (struct ias_object *) NULL) {
2255 /* Find the attribute (in the object) we target */
2256 ias_attr = irias_find_attrib(ias_obj,
2257 ias_opt->irda_attrib_name);
2258 if(ias_attr == (struct ias_attrib *) NULL) {
2263 /* Translate from internal to user structure */
2264 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2270 /* Copy reply to the user */
2271 if (copy_to_user(optval, ias_opt,
2272 sizeof(struct irda_ias_set))) {
2276 /* Note : don't need to put optlen, we checked it */
2279 case IRLMP_IAS_QUERY:
2280 /* The user want an object from a remote IAS database.
2281 * We need to use IAP to query the remote database and
2282 * then wait for the answer to come back. */
2284 /* Check that the user has allocated the right space for us */
2285 if (len != sizeof(struct irda_ias_set))
2288 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2289 if (ias_opt == NULL)
2292 /* Copy query to the driver. */
2293 if (copy_from_user(ias_opt, optval, len)) {
2298 /* At this point, there are two cases...
2299 * 1) the socket is connected - that's the easy case, we
2300 * just query the device we are connected to...
2301 * 2) the socket is not connected - the user doesn't want
2302 * to connect and/or may not have a valid service name
2303 * (so can't create a fake connection). In this case,
2304 * we assume that the user pass us a valid destination
2305 * address in the requesting structure...
2307 if(self->daddr != DEV_ADDR_ANY) {
2308 /* We are connected - reuse known daddr */
2309 daddr = self->daddr;
2311 /* We are not connected, we must specify a valid
2312 * destination address */
2313 daddr = ias_opt->daddr;
2314 if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2320 /* Check that we can proceed with IAP */
2322 IRDA_WARNING("%s: busy with a previous query\n",
2328 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2329 irda_getvalue_confirm);
2331 if (self->iriap == NULL) {
2336 /* Treat unexpected wakeup as disconnect */
2337 self->errno = -EHOSTUNREACH;
2339 /* Query remote LM-IAS */
2340 iriap_getvaluebyclass_request(self->iriap,
2342 ias_opt->irda_class_name,
2343 ias_opt->irda_attrib_name);
2345 /* Wait for answer, if not yet finished (or failed) */
2346 if (wait_event_interruptible(self->query_wait,
2347 (self->iriap == NULL))) {
2348 /* pending request uses copy of ias_opt-content
2349 * we can free it regardless! */
2351 /* Treat signals as disconnect */
2352 return -EHOSTUNREACH;
2355 /* Check what happened */
2359 /* Requested object/attribute doesn't exist */
2360 if((self->errno == IAS_CLASS_UNKNOWN) ||
2361 (self->errno == IAS_ATTRIB_UNKNOWN))
2362 return (-EADDRNOTAVAIL);
2364 return (-EHOSTUNREACH);
2367 /* Translate from internal to user structure */
2368 err = irda_extract_ias_value(ias_opt, self->ias_result);
2369 if (self->ias_result)
2370 irias_delete_value(self->ias_result);
2376 /* Copy reply to the user */
2377 if (copy_to_user(optval, ias_opt,
2378 sizeof(struct irda_ias_set))) {
2382 /* Note : don't need to put optlen, we checked it */
2385 case IRLMP_WAITDEVICE:
2386 /* This function is just another way of seeing life ;-)
2387 * IRLMP_ENUMDEVICES assumes that you have a static network,
2388 * and that you just want to pick one of the devices present.
2389 * On the other hand, in here we assume that no device is
2390 * present and that at some point in the future a device will
2391 * come into range. When this device arrive, we just wake
2392 * up the caller, so that he has time to connect to it before
2393 * the device goes away...
2394 * Note : once the node has been discovered for more than a
2395 * few second, it won't trigger this function, unless it
2396 * goes away and come back changes its hint bits (so we
2397 * might call it IRLMP_WAITNEWDEVICE).
2400 /* Check that the user is passing us an int */
2401 if (len != sizeof(int))
2403 /* Get timeout in ms (max time we block the caller) */
2404 if (get_user(val, (int __user *)optval))
2407 /* Tell IrLMP we want to be notified */
2408 irlmp_update_client(self->ckey, self->mask.word,
2409 irda_selective_discovery_indication,
2410 NULL, (void *) self);
2412 /* Do some discovery (and also return cached results) */
2413 irlmp_discovery_request(self->nslots);
2415 /* Wait until a node is discovered */
2416 if (!self->cachedaddr) {
2419 IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __FUNCTION__);
2421 /* Set watchdog timer to expire in <val> ms. */
2423 init_timer(&self->watchdog);
2424 self->watchdog.function = irda_discovery_timeout;
2425 self->watchdog.data = (unsigned long) self;
2426 self->watchdog.expires = jiffies + (val * HZ/1000);
2427 add_timer(&(self->watchdog));
2429 /* Wait for IR-LMP to call us back */
2430 __wait_event_interruptible(self->query_wait,
2431 (self->cachedaddr != 0 || self->errno == -ETIME),
2434 /* If watchdog is still activated, kill it! */
2435 if(timer_pending(&(self->watchdog)))
2436 del_timer(&(self->watchdog));
2438 IRDA_DEBUG(1, "%s(), ...waking up !\n", __FUNCTION__);
2444 IRDA_DEBUG(1, "%s(), found immediately !\n",
2447 /* Tell IrLMP that we have been notified */
2448 irlmp_update_client(self->ckey, self->mask.word,
2451 /* Check if the we got some results */
2452 if (!self->cachedaddr)
2453 return -EAGAIN; /* Didn't find any devices */
2454 daddr = self->cachedaddr;
2456 self->cachedaddr = 0;
2458 /* We return the daddr of the device that trigger the
2459 * wakeup. As irlmp pass us only the new devices, we
2460 * are sure that it's not an old device.
2461 * If the user want more details, he should query
2462 * the whole discovery log and pick one device...
2464 if (put_user(daddr, (int __user *)optval))
2469 return -ENOPROTOOPT;
2475 static struct net_proto_family irda_family_ops = {
2477 .create = irda_create,
2478 .owner = THIS_MODULE,
2481 static const struct proto_ops SOCKOPS_WRAPPED(irda_stream_ops) = {
2483 .owner = THIS_MODULE,
2484 .release = irda_release,
2486 .connect = irda_connect,
2487 .socketpair = sock_no_socketpair,
2488 .accept = irda_accept,
2489 .getname = irda_getname,
2491 .ioctl = irda_ioctl,
2492 #ifdef CONFIG_COMPAT
2493 .compat_ioctl = irda_compat_ioctl,
2495 .listen = irda_listen,
2496 .shutdown = irda_shutdown,
2497 .setsockopt = irda_setsockopt,
2498 .getsockopt = irda_getsockopt,
2499 .sendmsg = irda_sendmsg,
2500 .recvmsg = irda_recvmsg_stream,
2501 .mmap = sock_no_mmap,
2502 .sendpage = sock_no_sendpage,
2505 static const struct proto_ops SOCKOPS_WRAPPED(irda_seqpacket_ops) = {
2507 .owner = THIS_MODULE,
2508 .release = irda_release,
2510 .connect = irda_connect,
2511 .socketpair = sock_no_socketpair,
2512 .accept = irda_accept,
2513 .getname = irda_getname,
2514 .poll = datagram_poll,
2515 .ioctl = irda_ioctl,
2516 #ifdef CONFIG_COMPAT
2517 .compat_ioctl = irda_compat_ioctl,
2519 .listen = irda_listen,
2520 .shutdown = irda_shutdown,
2521 .setsockopt = irda_setsockopt,
2522 .getsockopt = irda_getsockopt,
2523 .sendmsg = irda_sendmsg,
2524 .recvmsg = irda_recvmsg_dgram,
2525 .mmap = sock_no_mmap,
2526 .sendpage = sock_no_sendpage,
2529 static const struct proto_ops SOCKOPS_WRAPPED(irda_dgram_ops) = {
2531 .owner = THIS_MODULE,
2532 .release = irda_release,
2534 .connect = irda_connect,
2535 .socketpair = sock_no_socketpair,
2536 .accept = irda_accept,
2537 .getname = irda_getname,
2538 .poll = datagram_poll,
2539 .ioctl = irda_ioctl,
2540 #ifdef CONFIG_COMPAT
2541 .compat_ioctl = irda_compat_ioctl,
2543 .listen = irda_listen,
2544 .shutdown = irda_shutdown,
2545 .setsockopt = irda_setsockopt,
2546 .getsockopt = irda_getsockopt,
2547 .sendmsg = irda_sendmsg_dgram,
2548 .recvmsg = irda_recvmsg_dgram,
2549 .mmap = sock_no_mmap,
2550 .sendpage = sock_no_sendpage,
2553 #ifdef CONFIG_IRDA_ULTRA
2554 static const struct proto_ops SOCKOPS_WRAPPED(irda_ultra_ops) = {
2556 .owner = THIS_MODULE,
2557 .release = irda_release,
2559 .connect = sock_no_connect,
2560 .socketpair = sock_no_socketpair,
2561 .accept = sock_no_accept,
2562 .getname = irda_getname,
2563 .poll = datagram_poll,
2564 .ioctl = irda_ioctl,
2565 #ifdef CONFIG_COMPAT
2566 .compat_ioctl = irda_compat_ioctl,
2568 .listen = sock_no_listen,
2569 .shutdown = irda_shutdown,
2570 .setsockopt = irda_setsockopt,
2571 .getsockopt = irda_getsockopt,
2572 .sendmsg = irda_sendmsg_ultra,
2573 .recvmsg = irda_recvmsg_dgram,
2574 .mmap = sock_no_mmap,
2575 .sendpage = sock_no_sendpage,
2577 #endif /* CONFIG_IRDA_ULTRA */
2579 #include <linux/smp_lock.h>
2580 SOCKOPS_WRAP(irda_stream, PF_IRDA);
2581 SOCKOPS_WRAP(irda_seqpacket, PF_IRDA);
2582 SOCKOPS_WRAP(irda_dgram, PF_IRDA);
2583 #ifdef CONFIG_IRDA_ULTRA
2584 SOCKOPS_WRAP(irda_ultra, PF_IRDA);
2585 #endif /* CONFIG_IRDA_ULTRA */
2588 * Function irsock_init (pro)
2590 * Initialize IrDA protocol
2593 int __init irsock_init(void)
2595 int rc = proto_register(&irda_proto, 0);
2598 rc = sock_register(&irda_family_ops);
2604 * Function irsock_cleanup (void)
2606 * Remove IrDA protocol
2609 void __exit irsock_cleanup(void)
2611 sock_unregister(PF_IRDA);
2612 proto_unregister(&irda_proto);