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/slab.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 net *net, struct socket *sock, int protocol, int kern);
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", __func__);
94 err = sock_queue_rcv_skb(sk, skb);
96 IRDA_DEBUG(1, "%s(), error: no more mem!\n", __func__);
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", __func__, 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", __func__, 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", __func__,
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", __func__, 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", __func__,
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", __func__);
308 skb = alloc_skb(TTP_MAX_HEADER + TTP_SAR_HEADER,
311 IRDA_DEBUG(0, "%s() Unable to allocate sk_buff!\n",
316 /* Reserve space for MUX_CONTROL and LAP header */
317 skb_reserve(skb, IRDA_MAX_HEADER);
319 irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
323 * Function irda_flow_indication (instance, sap, flow)
325 * Used by TinyTP to tell us if it can accept more data or not
328 static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
330 struct irda_sock *self;
333 IRDA_DEBUG(2, "%s()\n", __func__);
341 IRDA_DEBUG(1, "%s(), IrTTP wants us to slow down\n",
343 self->tx_flow = flow;
346 self->tx_flow = flow;
347 IRDA_DEBUG(1, "%s(), IrTTP wants us to start again\n",
349 wake_up_interruptible(sk_sleep(sk));
352 IRDA_DEBUG(0, "%s(), Unknown flow command!\n", __func__);
353 /* Unknown flow command, better stop */
354 self->tx_flow = flow;
360 * Function irda_getvalue_confirm (obj_id, value, priv)
362 * Got answer from remote LM-IAS, just pass object to requester...
364 * Note : duplicate from above, but we need our own version that
365 * doesn't touch the dtsap_sel and save the full value structure...
367 static void irda_getvalue_confirm(int result, __u16 obj_id,
368 struct ias_value *value, void *priv)
370 struct irda_sock *self;
374 IRDA_WARNING("%s: lost myself!\n", __func__);
378 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
380 /* We probably don't need to make any more queries */
381 iriap_close(self->iriap);
384 /* Check if request succeeded */
385 if (result != IAS_SUCCESS) {
386 IRDA_DEBUG(1, "%s(), IAS query failed! (%d)\n", __func__,
389 self->errno = result; /* We really need it later */
391 /* Wake up any processes waiting for result */
392 wake_up_interruptible(&self->query_wait);
397 /* Pass the object to the caller (so the caller must delete it) */
398 self->ias_result = value;
401 /* Wake up any processes waiting for result */
402 wake_up_interruptible(&self->query_wait);
406 * Function irda_selective_discovery_indication (discovery)
408 * Got a selective discovery indication from IrLMP.
410 * IrLMP is telling us that this node is new and matching our hint bit
411 * filter. Wake up any process waiting for answer...
413 static void irda_selective_discovery_indication(discinfo_t *discovery,
417 struct irda_sock *self;
419 IRDA_DEBUG(2, "%s()\n", __func__);
423 IRDA_WARNING("%s: lost myself!\n", __func__);
427 /* Pass parameter to the caller */
428 self->cachedaddr = discovery->daddr;
430 /* Wake up process if its waiting for device to be discovered */
431 wake_up_interruptible(&self->query_wait);
435 * Function irda_discovery_timeout (priv)
437 * Timeout in the selective discovery process
439 * We were waiting for a node to be discovered, but nothing has come up
440 * so far. Wake up the user and tell him that we failed...
442 static void irda_discovery_timeout(u_long priv)
444 struct irda_sock *self;
446 IRDA_DEBUG(2, "%s()\n", __func__);
448 self = (struct irda_sock *) priv;
449 BUG_ON(self == NULL);
451 /* Nothing for the caller */
452 self->cachelog = NULL;
453 self->cachedaddr = 0;
454 self->errno = -ETIME;
456 /* Wake up process if its still waiting... */
457 wake_up_interruptible(&self->query_wait);
461 * Function irda_open_tsap (self)
463 * Open local Transport Service Access Point (TSAP)
466 static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
471 IRDA_WARNING("%s: busy!\n", __func__);
475 /* Initialize callbacks to be used by the IrDA stack */
476 irda_notify_init(¬ify);
477 notify.connect_confirm = irda_connect_confirm;
478 notify.connect_indication = irda_connect_indication;
479 notify.disconnect_indication = irda_disconnect_indication;
480 notify.data_indication = irda_data_indication;
481 notify.udata_indication = irda_data_indication;
482 notify.flow_indication = irda_flow_indication;
483 notify.instance = self;
484 strncpy(notify.name, name, NOTIFY_MAX_NAME);
486 self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
488 if (self->tsap == NULL) {
489 IRDA_DEBUG(0, "%s(), Unable to allocate TSAP!\n",
493 /* Remember which TSAP selector we actually got */
494 self->stsap_sel = self->tsap->stsap_sel;
500 * Function irda_open_lsap (self)
502 * Open local Link Service Access Point (LSAP). Used for opening Ultra
505 #ifdef CONFIG_IRDA_ULTRA
506 static int irda_open_lsap(struct irda_sock *self, int pid)
511 IRDA_WARNING("%s(), busy!\n", __func__);
515 /* Initialize callbacks to be used by the IrDA stack */
516 irda_notify_init(¬ify);
517 notify.udata_indication = irda_data_indication;
518 notify.instance = self;
519 strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
521 self->lsap = irlmp_open_lsap(LSAP_CONNLESS, ¬ify, pid);
522 if (self->lsap == NULL) {
523 IRDA_DEBUG( 0, "%s(), Unable to allocate LSAP!\n", __func__);
529 #endif /* CONFIG_IRDA_ULTRA */
532 * Function irda_find_lsap_sel (self, name)
534 * Try to lookup LSAP selector in remote LM-IAS
536 * Basically, we start a IAP query, and then go to sleep. When the query
537 * return, irda_getvalue_confirm will wake us up, and we can examine the
538 * result of the query...
539 * Note that in some case, the query fail even before we go to sleep,
540 * creating some races...
542 static int irda_find_lsap_sel(struct irda_sock *self, char *name)
544 IRDA_DEBUG(2, "%s(%p, %s)\n", __func__, self, name);
547 IRDA_WARNING("%s(): busy with a previous query\n",
552 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
553 irda_getvalue_confirm);
554 if(self->iriap == NULL)
557 /* Treat unexpected wakeup as disconnect */
558 self->errno = -EHOSTUNREACH;
560 /* Query remote LM-IAS */
561 iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
562 name, "IrDA:TinyTP:LsapSel");
564 /* Wait for answer, if not yet finished (or failed) */
565 if (wait_event_interruptible(self->query_wait, (self->iriap==NULL)))
566 /* Treat signals as disconnect */
567 return -EHOSTUNREACH;
569 /* Check what happened */
572 /* Requested object/attribute doesn't exist */
573 if((self->errno == IAS_CLASS_UNKNOWN) ||
574 (self->errno == IAS_ATTRIB_UNKNOWN))
575 return -EADDRNOTAVAIL;
577 return -EHOSTUNREACH;
580 /* Get the remote TSAP selector */
581 switch (self->ias_result->type) {
583 IRDA_DEBUG(4, "%s() int=%d\n",
584 __func__, self->ias_result->t.integer);
586 if (self->ias_result->t.integer != -1)
587 self->dtsap_sel = self->ias_result->t.integer;
593 IRDA_DEBUG(0, "%s(), bad type!\n", __func__);
596 if (self->ias_result)
597 irias_delete_value(self->ias_result);
602 return -EADDRNOTAVAIL;
606 * Function irda_discover_daddr_and_lsap_sel (self, name)
608 * This try to find a device with the requested service.
610 * It basically look into the discovery log. For each address in the list,
611 * it queries the LM-IAS of the device to find if this device offer
612 * the requested service.
613 * If there is more than one node supporting the service, we complain
614 * to the user (it should move devices around).
615 * The, we set both the destination address and the lsap selector to point
616 * on the service on the unique device we have found.
618 * Note : this function fails if there is more than one device in range,
619 * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
620 * Moreover, we would need to wait the LAP disconnection...
622 static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
624 discinfo_t *discoveries; /* Copy of the discovery log */
625 int number; /* Number of nodes in the log */
627 int err = -ENETUNREACH;
628 __u32 daddr = DEV_ADDR_ANY; /* Address we found the service on */
629 __u8 dtsap_sel = 0x0; /* TSAP associated with it */
631 IRDA_DEBUG(2, "%s(), name=%s\n", __func__, name);
633 /* Ask lmp for the current discovery log
634 * Note : we have to use irlmp_get_discoveries(), as opposed
635 * to play with the cachelog directly, because while we are
636 * making our ias query, le log might change... */
637 discoveries = irlmp_get_discoveries(&number, self->mask.word,
639 /* Check if the we got some results */
640 if (discoveries == NULL)
641 return -ENETUNREACH; /* No nodes discovered */
644 * Now, check all discovered devices (if any), and connect
645 * client only about the services that the client is
648 for(i = 0; i < number; i++) {
649 /* Try the address in the log */
650 self->daddr = discoveries[i].daddr;
652 IRDA_DEBUG(1, "%s(), trying daddr = %08x\n",
653 __func__, self->daddr);
655 /* Query remote LM-IAS for this service */
656 err = irda_find_lsap_sel(self, name);
659 /* We found the requested service */
660 if(daddr != DEV_ADDR_ANY) {
661 IRDA_DEBUG(1, "%s(), discovered service ''%s'' in two different devices !!!\n",
663 self->daddr = DEV_ADDR_ANY;
667 /* First time we found that one, save it ! */
669 dtsap_sel = self->dtsap_sel;
672 /* Requested service simply doesn't exist on this node */
675 /* Something bad did happen :-( */
676 IRDA_DEBUG(0, "%s(), unexpected IAS query failure\n", __func__);
677 self->daddr = DEV_ADDR_ANY;
679 return -EHOSTUNREACH;
683 /* Cleanup our copy of the discovery log */
686 /* Check out what we found */
687 if(daddr == DEV_ADDR_ANY) {
688 IRDA_DEBUG(1, "%s(), cannot discover service ''%s'' in any device !!!\n",
690 self->daddr = DEV_ADDR_ANY;
691 return -EADDRNOTAVAIL;
694 /* Revert back to discovered device & service */
697 self->dtsap_sel = dtsap_sel;
699 IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n",
700 __func__, name, self->daddr);
706 * Function irda_getname (sock, uaddr, uaddr_len, peer)
708 * Return the our own, or peers socket address (sockaddr_irda)
711 static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
712 int *uaddr_len, int peer)
714 struct sockaddr_irda saddr;
715 struct sock *sk = sock->sk;
716 struct irda_sock *self = irda_sk(sk);
718 memset(&saddr, 0, sizeof(saddr));
720 if (sk->sk_state != TCP_ESTABLISHED)
723 saddr.sir_family = AF_IRDA;
724 saddr.sir_lsap_sel = self->dtsap_sel;
725 saddr.sir_addr = self->daddr;
727 saddr.sir_family = AF_IRDA;
728 saddr.sir_lsap_sel = self->stsap_sel;
729 saddr.sir_addr = self->saddr;
732 IRDA_DEBUG(1, "%s(), tsap_sel = %#x\n", __func__, saddr.sir_lsap_sel);
733 IRDA_DEBUG(1, "%s(), addr = %08x\n", __func__, saddr.sir_addr);
735 /* uaddr_len come to us uninitialised */
736 *uaddr_len = sizeof (struct sockaddr_irda);
737 memcpy(uaddr, &saddr, *uaddr_len);
743 * Function irda_listen (sock, backlog)
745 * Just move to the listen state
748 static int irda_listen(struct socket *sock, int backlog)
750 struct sock *sk = sock->sk;
751 int err = -EOPNOTSUPP;
753 IRDA_DEBUG(2, "%s()\n", __func__);
757 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
758 (sk->sk_type != SOCK_DGRAM))
761 if (sk->sk_state != TCP_LISTEN) {
762 sk->sk_max_ack_backlog = backlog;
763 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_DEBUG(2, "%s(%p)\n", __func__, self);
788 if (addr_len != sizeof(struct sockaddr_irda))
792 #ifdef CONFIG_IRDA_ULTRA
793 /* Special care for Ultra sockets */
794 if ((sk->sk_type == SOCK_DGRAM) &&
795 (sk->sk_protocol == IRDAPROTO_ULTRA)) {
796 self->pid = addr->sir_lsap_sel;
798 if (self->pid & 0x80) {
799 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
802 err = irda_open_lsap(self, self->pid);
806 /* Pretend we are connected */
807 sock->state = SS_CONNECTED;
808 sk->sk_state = TCP_ESTABLISHED;
813 #endif /* CONFIG_IRDA_ULTRA */
815 self->ias_obj = irias_new_object(addr->sir_name, jiffies);
817 if (self->ias_obj == NULL)
820 err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
822 irias_delete_object(self->ias_obj);
823 self->ias_obj = NULL;
827 /* Register with LM-IAS */
828 irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel",
829 self->stsap_sel, IAS_KERNEL_ATTR);
830 irias_insert_object(self->ias_obj);
839 * Function irda_accept (sock, newsock, flags)
841 * Wait for incoming connection
844 static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
846 struct sock *sk = sock->sk;
847 struct irda_sock *new, *self = irda_sk(sk);
849 struct sk_buff *skb = NULL;
852 IRDA_DEBUG(2, "%s()\n", __func__);
854 err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
861 if (sock->state != SS_UNCONNECTED)
864 if ((sk = sock->sk) == NULL)
868 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
869 (sk->sk_type != SOCK_DGRAM))
873 if (sk->sk_state != TCP_LISTEN)
877 * The read queue this time is holding sockets ready to use
878 * hooked into the SABM we saved
882 * We can perform the accept only if there is incoming data
883 * on the listening socket.
884 * So, we will block the caller until we receive any data.
885 * If the caller was waiting on select() or poll() before
886 * calling us, the data is waiting for us ;-)
890 skb = skb_dequeue(&sk->sk_receive_queue);
894 /* Non blocking operation */
896 if (flags & O_NONBLOCK)
899 err = wait_event_interruptible(*(sk_sleep(sk)),
900 skb_peek(&sk->sk_receive_queue));
910 newsk->sk_state = TCP_ESTABLISHED;
912 new = irda_sk(newsk);
914 /* Now attach up the new socket */
915 new->tsap = irttp_dup(self->tsap, new);
916 err = -EPERM; /* value does not seem to make sense. -arnd */
918 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
922 new->stsap_sel = new->tsap->stsap_sel;
923 new->dtsap_sel = new->tsap->dtsap_sel;
924 new->saddr = irttp_get_saddr(new->tsap);
925 new->daddr = irttp_get_daddr(new->tsap);
927 new->max_sdu_size_tx = self->max_sdu_size_tx;
928 new->max_sdu_size_rx = self->max_sdu_size_rx;
929 new->max_data_size = self->max_data_size;
930 new->max_header_size = self->max_header_size;
932 memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
934 /* Clean up the original one to keep it in listen state */
935 irttp_listen(self->tsap);
937 sk->sk_ack_backlog--;
939 newsock->state = SS_CONNECTED;
941 irda_connect_response(new);
950 * Function irda_connect (sock, uaddr, addr_len, flags)
952 * Connect to a IrDA device
954 * The main difference with a "standard" connect is that with IrDA we need
955 * to resolve the service name into a TSAP selector (in TCP, port number
956 * doesn't have to be resolved).
957 * Because of this service name resoltion, we can offer "auto-connect",
958 * where we connect to a service without specifying a destination address.
960 * Note : by consulting "errno", the user space caller may learn the cause
961 * of the failure. Most of them are visible in the function, others may come
962 * from subroutines called and are listed here :
963 * o EBUSY : already processing a connect
964 * o EHOSTUNREACH : bad addr->sir_addr argument
965 * o EADDRNOTAVAIL : bad addr->sir_name argument
966 * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
967 * o ENETUNREACH : no node found on the network (auto-connect)
969 static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
970 int addr_len, int flags)
972 struct sock *sk = sock->sk;
973 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
974 struct irda_sock *self = irda_sk(sk);
977 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
980 /* Don't allow connect for Ultra sockets */
981 err = -ESOCKTNOSUPPORT;
982 if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
985 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
986 sock->state = SS_CONNECTED;
988 goto out; /* Connect completed during a ERESTARTSYS event */
991 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
992 sock->state = SS_UNCONNECTED;
997 err = -EISCONN; /* No reconnect on a seqpacket socket */
998 if (sk->sk_state == TCP_ESTABLISHED)
1001 sk->sk_state = TCP_CLOSE;
1002 sock->state = SS_UNCONNECTED;
1005 if (addr_len != sizeof(struct sockaddr_irda))
1008 /* Check if user supplied any destination device address */
1009 if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
1010 /* Try to find one suitable */
1011 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
1013 IRDA_DEBUG(0, "%s(), auto-connect failed!\n", __func__);
1017 /* Use the one provided by the user */
1018 self->daddr = addr->sir_addr;
1019 IRDA_DEBUG(1, "%s(), daddr = %08x\n", __func__, self->daddr);
1021 /* If we don't have a valid service name, we assume the
1022 * user want to connect on a specific LSAP. Prevent
1023 * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
1024 if((addr->sir_name[0] != '\0') ||
1025 (addr->sir_lsap_sel >= 0x70)) {
1026 /* Query remote LM-IAS using service name */
1027 err = irda_find_lsap_sel(self, addr->sir_name);
1029 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1033 /* Directly connect to the remote LSAP
1034 * specified by the sir_lsap field.
1035 * Please use with caution, in IrDA LSAPs are
1036 * dynamic and there is no "well-known" LSAP. */
1037 self->dtsap_sel = addr->sir_lsap_sel;
1041 /* Check if we have opened a local TSAP */
1043 err = irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1048 /* Move to connecting socket, start sending Connect Requests */
1049 sock->state = SS_CONNECTING;
1050 sk->sk_state = TCP_SYN_SENT;
1052 /* Connect to remote device */
1053 err = irttp_connect_request(self->tsap, self->dtsap_sel,
1054 self->saddr, self->daddr, NULL,
1055 self->max_sdu_size_rx, NULL);
1057 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1063 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1067 if (wait_event_interruptible(*(sk_sleep(sk)),
1068 (sk->sk_state != TCP_SYN_SENT)))
1071 if (sk->sk_state != TCP_ESTABLISHED) {
1072 sock->state = SS_UNCONNECTED;
1073 if (sk->sk_prot->disconnect(sk, flags))
1074 sock->state = SS_DISCONNECTING;
1075 err = sock_error(sk);
1081 sock->state = SS_CONNECTED;
1083 /* At this point, IrLMP has assigned our source address */
1084 self->saddr = irttp_get_saddr(self->tsap);
1091 static struct proto irda_proto = {
1093 .owner = THIS_MODULE,
1094 .obj_size = sizeof(struct irda_sock),
1098 * Function irda_create (sock, protocol)
1100 * Create IrDA socket
1103 static int irda_create(struct net *net, struct socket *sock, int protocol,
1107 struct irda_sock *self;
1109 IRDA_DEBUG(2, "%s()\n", __func__);
1111 if (protocol < 0 || protocol > SK_PROTOCOL_MAX)
1114 if (net != &init_net)
1115 return -EAFNOSUPPORT;
1117 /* Check for valid socket type */
1118 switch (sock->type) {
1119 case SOCK_STREAM: /* For TTP connections with SAR disabled */
1120 case SOCK_SEQPACKET: /* For TTP connections with SAR enabled */
1121 case SOCK_DGRAM: /* For TTP Unitdata or LMP Ultra transfers */
1124 return -ESOCKTNOSUPPORT;
1127 /* Allocate networking socket */
1128 sk = sk_alloc(net, PF_IRDA, GFP_ATOMIC, &irda_proto);
1133 IRDA_DEBUG(2, "%s() : self is %p\n", __func__, self);
1135 init_waitqueue_head(&self->query_wait);
1137 switch (sock->type) {
1139 sock->ops = &irda_stream_ops;
1140 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1142 case SOCK_SEQPACKET:
1143 sock->ops = &irda_seqpacket_ops;
1144 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1148 #ifdef CONFIG_IRDA_ULTRA
1149 case IRDAPROTO_ULTRA:
1150 sock->ops = &irda_ultra_ops;
1151 /* Initialise now, because we may send on unbound
1152 * sockets. Jean II */
1153 self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1154 self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1156 #endif /* CONFIG_IRDA_ULTRA */
1157 case IRDAPROTO_UNITDATA:
1158 sock->ops = &irda_dgram_ops;
1159 /* We let Unitdata conn. be like seqpack conn. */
1160 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1164 return -ESOCKTNOSUPPORT;
1169 return -ESOCKTNOSUPPORT;
1172 /* Initialise networking socket struct */
1173 sock_init_data(sock, sk); /* Note : set sk->sk_refcnt to 1 */
1174 sk->sk_family = PF_IRDA;
1175 sk->sk_protocol = protocol;
1177 /* Register as a client with IrLMP */
1178 self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1179 self->mask.word = 0xffff;
1180 self->rx_flow = self->tx_flow = FLOW_START;
1181 self->nslots = DISCOVERY_DEFAULT_SLOTS;
1182 self->daddr = DEV_ADDR_ANY; /* Until we get connected */
1183 self->saddr = 0x0; /* so IrLMP assign us any link */
1188 * Function irda_destroy_socket (self)
1193 static void irda_destroy_socket(struct irda_sock *self)
1195 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1197 /* Unregister with IrLMP */
1198 irlmp_unregister_client(self->ckey);
1199 irlmp_unregister_service(self->skey);
1201 /* Unregister with LM-IAS */
1202 if (self->ias_obj) {
1203 irias_delete_object(self->ias_obj);
1204 self->ias_obj = NULL;
1208 iriap_close(self->iriap);
1213 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1214 irttp_close_tsap(self->tsap);
1217 #ifdef CONFIG_IRDA_ULTRA
1219 irlmp_close_lsap(self->lsap);
1222 #endif /* CONFIG_IRDA_ULTRA */
1226 * Function irda_release (sock)
1228 static int irda_release(struct socket *sock)
1230 struct sock *sk = sock->sk;
1232 IRDA_DEBUG(2, "%s()\n", __func__);
1238 sk->sk_state = TCP_CLOSE;
1239 sk->sk_shutdown |= SEND_SHUTDOWN;
1240 sk->sk_state_change(sk);
1242 /* Destroy IrDA socket */
1243 irda_destroy_socket(irda_sk(sk));
1249 /* Purge queues (see sock_init_data()) */
1250 skb_queue_purge(&sk->sk_receive_queue);
1252 /* Destroy networking socket if we are the last reference on it,
1253 * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1256 /* Notes on socket locking and deallocation... - Jean II
1257 * In theory we should put pairs of sock_hold() / sock_put() to
1258 * prevent the socket to be destroyed whenever there is an
1259 * outstanding request or outstanding incoming packet or event.
1261 * 1) This may include IAS request, both in connect and getsockopt.
1262 * Unfortunately, the situation is a bit more messy than it looks,
1263 * because we close iriap and kfree(self) above.
1265 * 2) This may include selective discovery in getsockopt.
1266 * Same stuff as above, irlmp registration and self are gone.
1268 * Probably 1 and 2 may not matter, because it's all triggered
1269 * by a process and the socket layer already prevent the
1270 * socket to go away while a process is holding it, through
1271 * sockfd_put() and fput()...
1273 * 3) This may include deferred TSAP closure. In particular,
1274 * we may receive a late irda_disconnect_indication()
1275 * Fortunately, (tsap_cb *)->close_pend should protect us
1278 * I did some testing on SMP, and it looks solid. And the socket
1279 * memory leak is now gone... - Jean II
1286 * Function irda_sendmsg (iocb, sock, msg, len)
1288 * Send message down to TinyTP. This function is used for both STREAM and
1289 * SEQPACK services. This is possible since it forces the client to
1290 * fragment the message if necessary
1292 static int irda_sendmsg(struct kiocb *iocb, struct socket *sock,
1293 struct msghdr *msg, size_t len)
1295 struct sock *sk = sock->sk;
1296 struct irda_sock *self;
1297 struct sk_buff *skb;
1300 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1302 /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1303 if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
1310 if (sk->sk_shutdown & SEND_SHUTDOWN)
1313 if (sk->sk_state != TCP_ESTABLISHED) {
1320 /* Check if IrTTP is wants us to slow down */
1322 if (wait_event_interruptible(*(sk_sleep(sk)),
1323 (self->tx_flow != FLOW_STOP || sk->sk_state != TCP_ESTABLISHED))) {
1328 /* Check if we are still connected */
1329 if (sk->sk_state != TCP_ESTABLISHED) {
1334 /* Check that we don't send out too big frames */
1335 if (len > self->max_data_size) {
1336 IRDA_DEBUG(2, "%s(), Chopping frame from %zd to %d bytes!\n",
1337 __func__, len, self->max_data_size);
1338 len = self->max_data_size;
1341 skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
1342 msg->msg_flags & MSG_DONTWAIT, &err);
1346 skb_reserve(skb, self->max_header_size + 16);
1347 skb_reset_transport_header(skb);
1349 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1356 * Just send the message to TinyTP, and let it deal with possible
1357 * errors. No need to duplicate all that here
1359 err = irttp_data_request(self->tsap, skb);
1361 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1366 /* Tell client how much data we actually sent */
1370 err = sk_stream_error(sk, msg->msg_flags, err);
1378 * Function irda_recvmsg_dgram (iocb, sock, msg, size, flags)
1380 * Try to receive message and copy it to user. The frame is discarded
1381 * after being read, regardless of how much the user actually read
1383 static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock,
1384 struct msghdr *msg, size_t size, int flags)
1386 struct sock *sk = sock->sk;
1387 struct irda_sock *self = irda_sk(sk);
1388 struct sk_buff *skb;
1392 IRDA_DEBUG(4, "%s()\n", __func__);
1394 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1395 flags & MSG_DONTWAIT, &err);
1399 skb_reset_transport_header(skb);
1402 if (copied > size) {
1403 IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n",
1404 __func__, copied, size);
1406 msg->msg_flags |= MSG_TRUNC;
1408 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1410 skb_free_datagram(sk, skb);
1413 * Check if we have previously stopped IrTTP and we know
1414 * have more free space in our rx_queue. If so tell IrTTP
1415 * to start delivering frames again before our rx_queue gets
1418 if (self->rx_flow == FLOW_STOP) {
1419 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1420 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1421 self->rx_flow = FLOW_START;
1422 irttp_flow_request(self->tsap, FLOW_START);
1430 * Function irda_recvmsg_stream (iocb, sock, msg, size, flags)
1432 static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
1433 struct msghdr *msg, size_t size, int flags)
1435 struct sock *sk = sock->sk;
1436 struct irda_sock *self = irda_sk(sk);
1437 int noblock = flags & MSG_DONTWAIT;
1442 IRDA_DEBUG(3, "%s()\n", __func__);
1444 if ((err = sock_error(sk)) < 0)
1447 if (sock->flags & __SO_ACCEPTCON)
1451 if (flags & MSG_OOB)
1455 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1456 timeo = sock_rcvtimeo(sk, noblock);
1460 struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1466 if (copied >= target)
1469 prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1472 * POSIX 1003.1g mandates this order.
1474 err = sock_error(sk);
1477 else if (sk->sk_shutdown & RCV_SHUTDOWN)
1481 else if (signal_pending(current))
1482 err = sock_intr_errno(timeo);
1483 else if (sk->sk_state != TCP_ESTABLISHED)
1485 else if (skb_peek(&sk->sk_receive_queue) == NULL)
1486 /* Wait process until data arrives */
1489 finish_wait(sk_sleep(sk), &wait);
1493 if (sk->sk_shutdown & RCV_SHUTDOWN)
1499 chunk = min_t(unsigned int, skb->len, size);
1500 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1501 skb_queue_head(&sk->sk_receive_queue, skb);
1509 /* Mark read part of skb as used */
1510 if (!(flags & MSG_PEEK)) {
1511 skb_pull(skb, chunk);
1513 /* put the skb back if we didn't use it up.. */
1515 IRDA_DEBUG(1, "%s(), back on q!\n",
1517 skb_queue_head(&sk->sk_receive_queue, skb);
1523 IRDA_DEBUG(0, "%s() questionable!?\n", __func__);
1525 /* put message back and return */
1526 skb_queue_head(&sk->sk_receive_queue, skb);
1532 * Check if we have previously stopped IrTTP and we know
1533 * have more free space in our rx_queue. If so tell IrTTP
1534 * to start delivering frames again before our rx_queue gets
1537 if (self->rx_flow == FLOW_STOP) {
1538 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1539 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1540 self->rx_flow = FLOW_START;
1541 irttp_flow_request(self->tsap, FLOW_START);
1549 * Function irda_sendmsg_dgram (iocb, sock, msg, len)
1551 * Send message down to TinyTP for the unreliable sequenced
1555 static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock,
1556 struct msghdr *msg, size_t len)
1558 struct sock *sk = sock->sk;
1559 struct irda_sock *self;
1560 struct sk_buff *skb;
1563 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1565 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1570 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1571 send_sig(SIGPIPE, current, 0);
1577 if (sk->sk_state != TCP_ESTABLISHED)
1583 * Check that we don't send out too big frames. This is an unreliable
1584 * service, so we have no fragmentation and no coalescence
1586 if (len > self->max_data_size) {
1587 IRDA_DEBUG(0, "%s(), Warning to much data! "
1588 "Chopping frame from %zd to %d bytes!\n",
1589 __func__, len, self->max_data_size);
1590 len = self->max_data_size;
1593 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1594 msg->msg_flags & MSG_DONTWAIT, &err);
1599 skb_reserve(skb, self->max_header_size);
1600 skb_reset_transport_header(skb);
1602 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1604 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1611 * Just send the message to TinyTP, and let it deal with possible
1612 * errors. No need to duplicate all that here
1614 err = irttp_udata_request(self->tsap, skb);
1616 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1629 * Function irda_sendmsg_ultra (iocb, sock, msg, len)
1631 * Send message down to IrLMP for the unreliable Ultra
1634 #ifdef CONFIG_IRDA_ULTRA
1635 static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock,
1636 struct msghdr *msg, size_t len)
1638 struct sock *sk = sock->sk;
1639 struct irda_sock *self;
1642 struct sk_buff *skb;
1645 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1648 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1654 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1655 send_sig(SIGPIPE, current, 0);
1661 /* Check if an address was specified with sendto. Jean II */
1662 if (msg->msg_name) {
1663 struct sockaddr_irda *addr = (struct sockaddr_irda *) msg->msg_name;
1665 /* Check address, extract pid. Jean II */
1666 if (msg->msg_namelen < sizeof(*addr))
1668 if (addr->sir_family != AF_IRDA)
1671 pid = addr->sir_lsap_sel;
1673 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
1678 /* Check that the socket is properly bound to an Ultra
1680 if ((self->lsap == NULL) ||
1681 (sk->sk_state != TCP_ESTABLISHED)) {
1682 IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n",
1687 /* Use PID from socket */
1692 * Check that we don't send out too big frames. This is an unreliable
1693 * service, so we have no fragmentation and no coalescence
1695 if (len > self->max_data_size) {
1696 IRDA_DEBUG(0, "%s(), Warning to much data! "
1697 "Chopping frame from %zd to %d bytes!\n",
1698 __func__, len, self->max_data_size);
1699 len = self->max_data_size;
1702 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1703 msg->msg_flags & MSG_DONTWAIT, &err);
1708 skb_reserve(skb, self->max_header_size);
1709 skb_reset_transport_header(skb);
1711 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1713 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1719 err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1722 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1727 #endif /* CONFIG_IRDA_ULTRA */
1730 * Function irda_shutdown (sk, how)
1732 static int irda_shutdown(struct socket *sock, int how)
1734 struct sock *sk = sock->sk;
1735 struct irda_sock *self = irda_sk(sk);
1737 IRDA_DEBUG(1, "%s(%p)\n", __func__, self);
1741 sk->sk_state = TCP_CLOSE;
1742 sk->sk_shutdown |= SEND_SHUTDOWN;
1743 sk->sk_state_change(sk);
1746 iriap_close(self->iriap);
1751 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1752 irttp_close_tsap(self->tsap);
1756 /* A few cleanup so the socket look as good as new... */
1757 self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */
1758 self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */
1759 self->saddr = 0x0; /* so IrLMP assign us any link */
1767 * Function irda_poll (file, sock, wait)
1769 static unsigned int irda_poll(struct file * file, struct socket *sock,
1772 struct sock *sk = sock->sk;
1773 struct irda_sock *self = irda_sk(sk);
1776 IRDA_DEBUG(4, "%s()\n", __func__);
1778 poll_wait(file, sk_sleep(sk), wait);
1781 /* Exceptional events? */
1784 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1785 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1790 if (!skb_queue_empty(&sk->sk_receive_queue)) {
1791 IRDA_DEBUG(4, "Socket is readable\n");
1792 mask |= POLLIN | POLLRDNORM;
1795 /* Connection-based need to check for termination and startup */
1796 switch (sk->sk_type) {
1798 if (sk->sk_state == TCP_CLOSE) {
1799 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1803 if (sk->sk_state == TCP_ESTABLISHED) {
1804 if ((self->tx_flow == FLOW_START) &&
1807 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1811 case SOCK_SEQPACKET:
1812 if ((self->tx_flow == FLOW_START) &&
1815 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1819 if (sock_writeable(sk))
1820 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1830 * Function irda_ioctl (sock, cmd, arg)
1832 static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1834 struct sock *sk = sock->sk;
1837 IRDA_DEBUG(4, "%s(), cmd=%#x\n", __func__, cmd);
1844 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1847 err = put_user(amount, (unsigned int __user *)arg);
1852 struct sk_buff *skb;
1854 /* These two are safe on a single CPU system as only user tasks fiddle here */
1855 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1857 err = put_user(amount, (unsigned int __user *)arg);
1863 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
1868 case SIOCGIFDSTADDR:
1869 case SIOCSIFDSTADDR:
1870 case SIOCGIFBRDADDR:
1871 case SIOCSIFBRDADDR:
1872 case SIOCGIFNETMASK:
1873 case SIOCSIFNETMASK:
1878 IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __func__);
1885 #ifdef CONFIG_COMPAT
1887 * Function irda_ioctl (sock, cmd, arg)
1889 static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1892 * All IRDA's ioctl are standard ones.
1894 return -ENOIOCTLCMD;
1899 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1901 * Set some options for the socket
1904 static int irda_setsockopt(struct socket *sock, int level, int optname,
1905 char __user *optval, unsigned int optlen)
1907 struct sock *sk = sock->sk;
1908 struct irda_sock *self = irda_sk(sk);
1909 struct irda_ias_set *ias_opt;
1910 struct ias_object *ias_obj;
1911 struct ias_attrib * ias_attr; /* Attribute in IAS object */
1912 int opt, free_ias = 0, err = 0;
1914 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1916 if (level != SOL_IRLMP)
1917 return -ENOPROTOOPT;
1923 /* The user want to add an attribute to an existing IAS object
1924 * (in the IAS database) or to create a new object with this
1926 * We first query IAS to know if the object exist, and then
1927 * create the right attribute...
1930 if (optlen != sizeof(struct irda_ias_set)) {
1935 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1936 if (ias_opt == NULL) {
1941 /* Copy query to the driver. */
1942 if (copy_from_user(ias_opt, optval, optlen)) {
1948 /* Find the object we target.
1949 * If the user gives us an empty string, we use the object
1950 * associated with this socket. This will workaround
1951 * duplicated class name - Jean II */
1952 if(ias_opt->irda_class_name[0] == '\0') {
1953 if(self->ias_obj == NULL) {
1958 ias_obj = self->ias_obj;
1960 ias_obj = irias_find_object(ias_opt->irda_class_name);
1962 /* Only ROOT can mess with the global IAS database.
1963 * Users can only add attributes to the object associated
1964 * with the socket they own - Jean II */
1965 if((!capable(CAP_NET_ADMIN)) &&
1966 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1972 /* If the object doesn't exist, create it */
1973 if(ias_obj == (struct ias_object *) NULL) {
1974 /* Create a new object */
1975 ias_obj = irias_new_object(ias_opt->irda_class_name,
1977 if (ias_obj == NULL) {
1985 /* Do we have the attribute already ? */
1986 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1989 kfree(ias_obj->name);
1996 /* Look at the type */
1997 switch(ias_opt->irda_attrib_type) {
1999 /* Add an integer attribute */
2000 irias_add_integer_attrib(
2002 ias_opt->irda_attrib_name,
2003 ias_opt->attribute.irda_attrib_int,
2008 if(ias_opt->attribute.irda_attrib_octet_seq.len >
2009 IAS_MAX_OCTET_STRING) {
2012 kfree(ias_obj->name);
2019 /* Add an octet sequence attribute */
2020 irias_add_octseq_attrib(
2022 ias_opt->irda_attrib_name,
2023 ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2024 ias_opt->attribute.irda_attrib_octet_seq.len,
2028 /* Should check charset & co */
2030 /* The length is encoded in a __u8, and
2031 * IAS_MAX_STRING == 256, so there is no way
2032 * userspace can pass us a string too large.
2034 /* NULL terminate the string (avoid troubles) */
2035 ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
2036 /* Add a string attribute */
2037 irias_add_string_attrib(
2039 ias_opt->irda_attrib_name,
2040 ias_opt->attribute.irda_attrib_string.string,
2046 kfree(ias_obj->name);
2052 irias_insert_object(ias_obj);
2056 /* The user want to delete an object from our local IAS
2057 * database. We just need to query the IAS, check is the
2058 * object is not owned by the kernel and delete it.
2061 if (optlen != sizeof(struct irda_ias_set)) {
2066 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2067 if (ias_opt == NULL) {
2072 /* Copy query to the driver. */
2073 if (copy_from_user(ias_opt, optval, optlen)) {
2079 /* Find the object we target.
2080 * If the user gives us an empty string, we use the object
2081 * associated with this socket. This will workaround
2082 * duplicated class name - Jean II */
2083 if(ias_opt->irda_class_name[0] == '\0')
2084 ias_obj = self->ias_obj;
2086 ias_obj = irias_find_object(ias_opt->irda_class_name);
2087 if(ias_obj == (struct ias_object *) NULL) {
2093 /* Only ROOT can mess with the global IAS database.
2094 * Users can only del attributes from the object associated
2095 * with the socket they own - Jean II */
2096 if((!capable(CAP_NET_ADMIN)) &&
2097 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2103 /* Find the attribute (in the object) we target */
2104 ias_attr = irias_find_attrib(ias_obj,
2105 ias_opt->irda_attrib_name);
2106 if(ias_attr == (struct ias_attrib *) NULL) {
2112 /* Check is the user space own the object */
2113 if(ias_attr->value->owner != IAS_USER_ATTR) {
2114 IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __func__);
2120 /* Remove the attribute (and maybe the object) */
2121 irias_delete_attrib(ias_obj, ias_attr, 1);
2124 case IRLMP_MAX_SDU_SIZE:
2125 if (optlen < sizeof(int)) {
2130 if (get_user(opt, (int __user *)optval)) {
2135 /* Only possible for a seqpacket service (TTP with SAR) */
2136 if (sk->sk_type != SOCK_SEQPACKET) {
2137 IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n",
2139 self->max_sdu_size_rx = opt;
2141 IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2147 case IRLMP_HINTS_SET:
2148 if (optlen < sizeof(int)) {
2153 /* The input is really a (__u8 hints[2]), easier as an int */
2154 if (get_user(opt, (int __user *)optval)) {
2159 /* Unregister any old registration */
2161 irlmp_unregister_service(self->skey);
2163 self->skey = irlmp_register_service((__u16) opt);
2165 case IRLMP_HINT_MASK_SET:
2166 /* As opposed to the previous case which set the hint bits
2167 * that we advertise, this one set the filter we use when
2168 * making a discovery (nodes which don't match any hint
2169 * bit in the mask are not reported).
2171 if (optlen < sizeof(int)) {
2176 /* The input is really a (__u8 hints[2]), easier as an int */
2177 if (get_user(opt, (int __user *)optval)) {
2182 /* Set the new hint mask */
2183 self->mask.word = (__u16) opt;
2184 /* Mask out extension bits */
2185 self->mask.word &= 0x7f7f;
2186 /* Check if no bits */
2187 if(!self->mask.word)
2188 self->mask.word = 0xFFFF;
2203 * Function irda_extract_ias_value(ias_opt, ias_value)
2205 * Translate internal IAS value structure to the user space representation
2207 * The external representation of IAS values, as we exchange them with
2208 * user space program is quite different from the internal representation,
2209 * as stored in the IAS database (because we need a flat structure for
2210 * crossing kernel boundary).
2211 * This function transform the former in the latter. We also check
2212 * that the value type is valid.
2214 static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2215 struct ias_value *ias_value)
2217 /* Look at the type */
2218 switch (ias_value->type) {
2220 /* Copy the integer */
2221 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2225 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2227 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2228 ias_value->t.oct_seq, ias_value->len);
2232 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2233 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2235 memcpy(ias_opt->attribute.irda_attrib_string.string,
2236 ias_value->t.string, ias_value->len);
2237 /* NULL terminate the string (avoid troubles) */
2238 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2245 /* Copy type over */
2246 ias_opt->irda_attrib_type = ias_value->type;
2252 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2254 static int irda_getsockopt(struct socket *sock, int level, int optname,
2255 char __user *optval, int __user *optlen)
2257 struct sock *sk = sock->sk;
2258 struct irda_sock *self = irda_sk(sk);
2259 struct irda_device_list list;
2260 struct irda_device_info *discoveries;
2261 struct irda_ias_set * ias_opt; /* IAS get/query params */
2262 struct ias_object * ias_obj; /* Object in IAS */
2263 struct ias_attrib * ias_attr; /* Attribute in IAS object */
2264 int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */
2270 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
2272 if (level != SOL_IRLMP)
2273 return -ENOPROTOOPT;
2275 if (get_user(len, optlen))
2284 case IRLMP_ENUMDEVICES:
2286 /* Offset to first device entry */
2287 offset = sizeof(struct irda_device_list) -
2288 sizeof(struct irda_device_info);
2295 /* Ask lmp for the current discovery log */
2296 discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2298 /* Check if the we got some results */
2299 if (discoveries == NULL) {
2301 goto out; /* Didn't find any devices */
2304 /* Write total list length back to client */
2305 if (copy_to_user(optval, &list, offset))
2308 /* Copy the list itself - watch for overflow */
2309 if (list.len > 2048) {
2313 total = offset + (list.len * sizeof(struct irda_device_info));
2316 if (copy_to_user(optval+offset, discoveries, total - offset))
2319 /* Write total number of bytes used back to client */
2320 if (put_user(total, optlen))
2323 /* Free up our buffer */
2326 case IRLMP_MAX_SDU_SIZE:
2327 val = self->max_data_size;
2329 if (put_user(len, optlen)) {
2334 if (copy_to_user(optval, &val, len)) {
2341 /* The user want an object from our local IAS database.
2342 * We just need to query the IAS and return the value
2345 /* Check that the user has allocated the right space for us */
2346 if (len != sizeof(struct irda_ias_set)) {
2351 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2352 if (ias_opt == NULL) {
2357 /* Copy query to the driver. */
2358 if (copy_from_user(ias_opt, optval, len)) {
2364 /* Find the object we target.
2365 * If the user gives us an empty string, we use the object
2366 * associated with this socket. This will workaround
2367 * duplicated class name - Jean II */
2368 if(ias_opt->irda_class_name[0] == '\0')
2369 ias_obj = self->ias_obj;
2371 ias_obj = irias_find_object(ias_opt->irda_class_name);
2372 if(ias_obj == (struct ias_object *) NULL) {
2378 /* Find the attribute (in the object) we target */
2379 ias_attr = irias_find_attrib(ias_obj,
2380 ias_opt->irda_attrib_name);
2381 if(ias_attr == (struct ias_attrib *) NULL) {
2387 /* Translate from internal to user structure */
2388 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2394 /* Copy reply to the user */
2395 if (copy_to_user(optval, ias_opt,
2396 sizeof(struct irda_ias_set))) {
2401 /* Note : don't need to put optlen, we checked it */
2404 case IRLMP_IAS_QUERY:
2405 /* The user want an object from a remote IAS database.
2406 * We need to use IAP to query the remote database and
2407 * then wait for the answer to come back. */
2409 /* Check that the user has allocated the right space for us */
2410 if (len != sizeof(struct irda_ias_set)) {
2415 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2416 if (ias_opt == NULL) {
2421 /* Copy query to the driver. */
2422 if (copy_from_user(ias_opt, optval, len)) {
2428 /* At this point, there are two cases...
2429 * 1) the socket is connected - that's the easy case, we
2430 * just query the device we are connected to...
2431 * 2) the socket is not connected - the user doesn't want
2432 * to connect and/or may not have a valid service name
2433 * (so can't create a fake connection). In this case,
2434 * we assume that the user pass us a valid destination
2435 * address in the requesting structure...
2437 if(self->daddr != DEV_ADDR_ANY) {
2438 /* We are connected - reuse known daddr */
2439 daddr = self->daddr;
2441 /* We are not connected, we must specify a valid
2442 * destination address */
2443 daddr = ias_opt->daddr;
2444 if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2451 /* Check that we can proceed with IAP */
2453 IRDA_WARNING("%s: busy with a previous query\n",
2460 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2461 irda_getvalue_confirm);
2463 if (self->iriap == NULL) {
2469 /* Treat unexpected wakeup as disconnect */
2470 self->errno = -EHOSTUNREACH;
2472 /* Query remote LM-IAS */
2473 iriap_getvaluebyclass_request(self->iriap,
2475 ias_opt->irda_class_name,
2476 ias_opt->irda_attrib_name);
2478 /* Wait for answer, if not yet finished (or failed) */
2479 if (wait_event_interruptible(self->query_wait,
2480 (self->iriap == NULL))) {
2481 /* pending request uses copy of ias_opt-content
2482 * we can free it regardless! */
2484 /* Treat signals as disconnect */
2485 err = -EHOSTUNREACH;
2489 /* Check what happened */
2493 /* Requested object/attribute doesn't exist */
2494 if((self->errno == IAS_CLASS_UNKNOWN) ||
2495 (self->errno == IAS_ATTRIB_UNKNOWN))
2496 err = -EADDRNOTAVAIL;
2498 err = -EHOSTUNREACH;
2503 /* Translate from internal to user structure */
2504 err = irda_extract_ias_value(ias_opt, self->ias_result);
2505 if (self->ias_result)
2506 irias_delete_value(self->ias_result);
2512 /* Copy reply to the user */
2513 if (copy_to_user(optval, ias_opt,
2514 sizeof(struct irda_ias_set))) {
2519 /* Note : don't need to put optlen, we checked it */
2522 case IRLMP_WAITDEVICE:
2523 /* This function is just another way of seeing life ;-)
2524 * IRLMP_ENUMDEVICES assumes that you have a static network,
2525 * and that you just want to pick one of the devices present.
2526 * On the other hand, in here we assume that no device is
2527 * present and that at some point in the future a device will
2528 * come into range. When this device arrive, we just wake
2529 * up the caller, so that he has time to connect to it before
2530 * the device goes away...
2531 * Note : once the node has been discovered for more than a
2532 * few second, it won't trigger this function, unless it
2533 * goes away and come back changes its hint bits (so we
2534 * might call it IRLMP_WAITNEWDEVICE).
2537 /* Check that the user is passing us an int */
2538 if (len != sizeof(int)) {
2542 /* Get timeout in ms (max time we block the caller) */
2543 if (get_user(val, (int __user *)optval)) {
2548 /* Tell IrLMP we want to be notified */
2549 irlmp_update_client(self->ckey, self->mask.word,
2550 irda_selective_discovery_indication,
2551 NULL, (void *) self);
2553 /* Do some discovery (and also return cached results) */
2554 irlmp_discovery_request(self->nslots);
2556 /* Wait until a node is discovered */
2557 if (!self->cachedaddr) {
2558 IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __func__);
2560 /* Set watchdog timer to expire in <val> ms. */
2562 setup_timer(&self->watchdog, irda_discovery_timeout,
2563 (unsigned long)self);
2564 self->watchdog.expires = jiffies + (val * HZ/1000);
2565 add_timer(&(self->watchdog));
2567 /* Wait for IR-LMP to call us back */
2568 __wait_event_interruptible(self->query_wait,
2569 (self->cachedaddr != 0 || self->errno == -ETIME),
2572 /* If watchdog is still activated, kill it! */
2573 if(timer_pending(&(self->watchdog)))
2574 del_timer(&(self->watchdog));
2576 IRDA_DEBUG(1, "%s(), ...waking up !\n", __func__);
2582 IRDA_DEBUG(1, "%s(), found immediately !\n",
2585 /* Tell IrLMP that we have been notified */
2586 irlmp_update_client(self->ckey, self->mask.word,
2589 /* Check if the we got some results */
2590 if (!self->cachedaddr) {
2591 err = -EAGAIN; /* Didn't find any devices */
2594 daddr = self->cachedaddr;
2596 self->cachedaddr = 0;
2598 /* We return the daddr of the device that trigger the
2599 * wakeup. As irlmp pass us only the new devices, we
2600 * are sure that it's not an old device.
2601 * If the user want more details, he should query
2602 * the whole discovery log and pick one device...
2604 if (put_user(daddr, (int __user *)optval)) {
2621 static const struct net_proto_family irda_family_ops = {
2623 .create = irda_create,
2624 .owner = THIS_MODULE,
2627 static const struct proto_ops irda_stream_ops = {
2629 .owner = THIS_MODULE,
2630 .release = irda_release,
2632 .connect = irda_connect,
2633 .socketpair = sock_no_socketpair,
2634 .accept = irda_accept,
2635 .getname = irda_getname,
2637 .ioctl = irda_ioctl,
2638 #ifdef CONFIG_COMPAT
2639 .compat_ioctl = irda_compat_ioctl,
2641 .listen = irda_listen,
2642 .shutdown = irda_shutdown,
2643 .setsockopt = irda_setsockopt,
2644 .getsockopt = irda_getsockopt,
2645 .sendmsg = irda_sendmsg,
2646 .recvmsg = irda_recvmsg_stream,
2647 .mmap = sock_no_mmap,
2648 .sendpage = sock_no_sendpage,
2651 static const struct proto_ops irda_seqpacket_ops = {
2653 .owner = THIS_MODULE,
2654 .release = irda_release,
2656 .connect = irda_connect,
2657 .socketpair = sock_no_socketpair,
2658 .accept = irda_accept,
2659 .getname = irda_getname,
2660 .poll = datagram_poll,
2661 .ioctl = irda_ioctl,
2662 #ifdef CONFIG_COMPAT
2663 .compat_ioctl = irda_compat_ioctl,
2665 .listen = irda_listen,
2666 .shutdown = irda_shutdown,
2667 .setsockopt = irda_setsockopt,
2668 .getsockopt = irda_getsockopt,
2669 .sendmsg = irda_sendmsg,
2670 .recvmsg = irda_recvmsg_dgram,
2671 .mmap = sock_no_mmap,
2672 .sendpage = sock_no_sendpage,
2675 static const struct proto_ops irda_dgram_ops = {
2677 .owner = THIS_MODULE,
2678 .release = irda_release,
2680 .connect = irda_connect,
2681 .socketpair = sock_no_socketpair,
2682 .accept = irda_accept,
2683 .getname = irda_getname,
2684 .poll = datagram_poll,
2685 .ioctl = irda_ioctl,
2686 #ifdef CONFIG_COMPAT
2687 .compat_ioctl = irda_compat_ioctl,
2689 .listen = irda_listen,
2690 .shutdown = irda_shutdown,
2691 .setsockopt = irda_setsockopt,
2692 .getsockopt = irda_getsockopt,
2693 .sendmsg = irda_sendmsg_dgram,
2694 .recvmsg = irda_recvmsg_dgram,
2695 .mmap = sock_no_mmap,
2696 .sendpage = sock_no_sendpage,
2699 #ifdef CONFIG_IRDA_ULTRA
2700 static const struct proto_ops irda_ultra_ops = {
2702 .owner = THIS_MODULE,
2703 .release = irda_release,
2705 .connect = sock_no_connect,
2706 .socketpair = sock_no_socketpair,
2707 .accept = sock_no_accept,
2708 .getname = irda_getname,
2709 .poll = datagram_poll,
2710 .ioctl = irda_ioctl,
2711 #ifdef CONFIG_COMPAT
2712 .compat_ioctl = irda_compat_ioctl,
2714 .listen = sock_no_listen,
2715 .shutdown = irda_shutdown,
2716 .setsockopt = irda_setsockopt,
2717 .getsockopt = irda_getsockopt,
2718 .sendmsg = irda_sendmsg_ultra,
2719 .recvmsg = irda_recvmsg_dgram,
2720 .mmap = sock_no_mmap,
2721 .sendpage = sock_no_sendpage,
2723 #endif /* CONFIG_IRDA_ULTRA */
2726 * Function irsock_init (pro)
2728 * Initialize IrDA protocol
2731 int __init irsock_init(void)
2733 int rc = proto_register(&irda_proto, 0);
2736 rc = sock_register(&irda_family_ops);
2742 * Function irsock_cleanup (void)
2744 * Remove IrDA protocol
2747 void irsock_cleanup(void)
2749 sock_unregister(PF_IRDA);
2750 proto_unregister(&irda_proto);