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, see <http://www.gnu.org/licenses/>.
30 * Linux-IrDA now supports four different types of IrDA sockets:
32 * o SOCK_STREAM: TinyTP connections with SAR disabled. The
33 * max SDU size is 0 for conn. of this type
34 * o SOCK_SEQPACKET: TinyTP connections with SAR enabled. TTP may
35 * fragment the messages, but will preserve
36 * the message boundaries
37 * o SOCK_DGRAM: IRDAPROTO_UNITDATA: TinyTP connections with Unitdata
38 * (unreliable) transfers
39 * IRDAPROTO_ULTRA: Connectionless and unreliable data
41 ********************************************************************/
43 #include <linux/capability.h>
44 #include <linux/module.h>
45 #include <linux/types.h>
46 #include <linux/socket.h>
47 #include <linux/sockios.h>
48 #include <linux/slab.h>
49 #include <linux/init.h>
50 #include <linux/net.h>
51 #include <linux/irda.h>
52 #include <linux/poll.h>
54 #include <asm/ioctls.h> /* TIOCOUTQ, TIOCINQ */
55 #include <asm/uaccess.h>
58 #include <net/tcp_states.h>
60 #include <net/irda/af_irda.h>
62 static int irda_create(struct net *net, struct socket *sock, int protocol, int kern);
64 static const struct proto_ops irda_stream_ops;
65 static const struct proto_ops irda_seqpacket_ops;
66 static const struct proto_ops irda_dgram_ops;
68 #ifdef CONFIG_IRDA_ULTRA
69 static const struct proto_ops irda_ultra_ops;
70 #define ULTRA_MAX_DATA 382
71 #endif /* CONFIG_IRDA_ULTRA */
73 #define IRDA_MAX_HEADER (TTP_MAX_HEADER)
76 * Function irda_data_indication (instance, sap, skb)
78 * Received some data from TinyTP. Just queue it on the receive queue
81 static int irda_data_indication(void *instance, void *sap, struct sk_buff *skb)
83 struct irda_sock *self;
90 err = sock_queue_rcv_skb(sk, skb);
92 pr_debug("%s(), error: no more mem!\n", __func__);
93 self->rx_flow = FLOW_STOP;
95 /* When we return error, TTP will need to requeue the skb */
103 * Function irda_disconnect_indication (instance, sap, reason, skb)
105 * Connection has been closed. Check reason to find out why
108 static void irda_disconnect_indication(void *instance, void *sap,
109 LM_REASON reason, struct sk_buff *skb)
111 struct irda_sock *self;
116 pr_debug("%s(%p)\n", __func__, self);
118 /* Don't care about it, but let's not leak it */
124 pr_debug("%s(%p) : BUG : sk is NULL\n",
129 /* Prevent race conditions with irda_release() and irda_shutdown() */
131 if (!sock_flag(sk, SOCK_DEAD) && sk->sk_state != TCP_CLOSE) {
132 sk->sk_state = TCP_CLOSE;
133 sk->sk_shutdown |= SEND_SHUTDOWN;
135 sk->sk_state_change(sk);
138 * If we leave it open, IrLMP put it back into the list of
139 * unconnected LSAPs. The problem is that any incoming request
140 * can then be matched to this socket (and it will be, because
141 * it is at the head of the list). This would prevent any
142 * listening socket waiting on the same TSAP to get those
143 * requests. Some apps forget to close sockets, or hang to it
144 * a bit too long, so we may stay in this dead state long
145 * enough to be noticed...
146 * Note : all socket function do check sk->sk_state, so we are
151 irttp_close_tsap(self->tsap);
157 /* Note : once we are there, there is not much you want to do
158 * with the socket anymore, apart from closing it.
159 * For example, bind() and connect() won't reset sk->sk_err,
160 * sk->sk_shutdown and sk->sk_flags to valid values...
166 * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb)
168 * Connections has been confirmed by the remote device
171 static void irda_connect_confirm(void *instance, void *sap,
172 struct qos_info *qos,
173 __u32 max_sdu_size, __u8 max_header_size,
176 struct irda_sock *self;
181 pr_debug("%s(%p)\n", __func__, self);
190 // Should be ??? skb_queue_tail(&sk->sk_receive_queue, skb);
192 /* How much header space do we need to reserve */
193 self->max_header_size = max_header_size;
195 /* IrTTP max SDU size in transmit direction */
196 self->max_sdu_size_tx = max_sdu_size;
198 /* Find out what the largest chunk of data that we can transmit is */
199 switch (sk->sk_type) {
201 if (max_sdu_size != 0) {
202 net_err_ratelimited("%s: max_sdu_size must be 0\n",
206 self->max_data_size = irttp_get_max_seg_size(self->tsap);
209 if (max_sdu_size == 0) {
210 net_err_ratelimited("%s: max_sdu_size cannot be 0\n",
214 self->max_data_size = max_sdu_size;
217 self->max_data_size = irttp_get_max_seg_size(self->tsap);
220 pr_debug("%s(), max_data_size=%d\n", __func__,
221 self->max_data_size);
223 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
225 /* We are now connected! */
226 sk->sk_state = TCP_ESTABLISHED;
227 sk->sk_state_change(sk);
231 * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata)
233 * Incoming connection
236 static void irda_connect_indication(void *instance, void *sap,
237 struct qos_info *qos, __u32 max_sdu_size,
238 __u8 max_header_size, struct sk_buff *skb)
240 struct irda_sock *self;
245 pr_debug("%s(%p)\n", __func__, self);
253 /* How much header space do we need to reserve */
254 self->max_header_size = max_header_size;
256 /* IrTTP max SDU size in transmit direction */
257 self->max_sdu_size_tx = max_sdu_size;
259 /* Find out what the largest chunk of data that we can transmit is */
260 switch (sk->sk_type) {
262 if (max_sdu_size != 0) {
263 net_err_ratelimited("%s: max_sdu_size must be 0\n",
268 self->max_data_size = irttp_get_max_seg_size(self->tsap);
271 if (max_sdu_size == 0) {
272 net_err_ratelimited("%s: max_sdu_size cannot be 0\n",
277 self->max_data_size = max_sdu_size;
280 self->max_data_size = irttp_get_max_seg_size(self->tsap);
283 pr_debug("%s(), max_data_size=%d\n", __func__,
284 self->max_data_size);
286 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
288 skb_queue_tail(&sk->sk_receive_queue, skb);
289 sk->sk_state_change(sk);
293 * Function irda_connect_response (handle)
295 * Accept incoming connection
298 static void irda_connect_response(struct irda_sock *self)
302 skb = alloc_skb(TTP_MAX_HEADER + TTP_SAR_HEADER, GFP_KERNEL);
304 pr_debug("%s() Unable to allocate sk_buff!\n",
309 /* Reserve space for MUX_CONTROL and LAP header */
310 skb_reserve(skb, IRDA_MAX_HEADER);
312 irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
316 * Function irda_flow_indication (instance, sap, flow)
318 * Used by TinyTP to tell us if it can accept more data or not
321 static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
323 struct irda_sock *self;
332 pr_debug("%s(), IrTTP wants us to slow down\n",
334 self->tx_flow = flow;
337 self->tx_flow = flow;
338 pr_debug("%s(), IrTTP wants us to start again\n",
340 wake_up_interruptible(sk_sleep(sk));
343 pr_debug("%s(), Unknown flow command!\n", __func__);
344 /* Unknown flow command, better stop */
345 self->tx_flow = flow;
351 * Function irda_getvalue_confirm (obj_id, value, priv)
353 * Got answer from remote LM-IAS, just pass object to requester...
355 * Note : duplicate from above, but we need our own version that
356 * doesn't touch the dtsap_sel and save the full value structure...
358 static void irda_getvalue_confirm(int result, __u16 obj_id,
359 struct ias_value *value, void *priv)
361 struct irda_sock *self;
365 net_warn_ratelimited("%s: lost myself!\n", __func__);
369 pr_debug("%s(%p)\n", __func__, self);
371 /* We probably don't need to make any more queries */
372 iriap_close(self->iriap);
375 /* Check if request succeeded */
376 if (result != IAS_SUCCESS) {
377 pr_debug("%s(), IAS query failed! (%d)\n", __func__,
380 self->errno = result; /* We really need it later */
382 /* Wake up any processes waiting for result */
383 wake_up_interruptible(&self->query_wait);
388 /* Pass the object to the caller (so the caller must delete it) */
389 self->ias_result = value;
392 /* Wake up any processes waiting for result */
393 wake_up_interruptible(&self->query_wait);
397 * Function irda_selective_discovery_indication (discovery)
399 * Got a selective discovery indication from IrLMP.
401 * IrLMP is telling us that this node is new and matching our hint bit
402 * filter. Wake up any process waiting for answer...
404 static void irda_selective_discovery_indication(discinfo_t *discovery,
408 struct irda_sock *self;
412 net_warn_ratelimited("%s: lost myself!\n", __func__);
416 /* Pass parameter to the caller */
417 self->cachedaddr = discovery->daddr;
419 /* Wake up process if its waiting for device to be discovered */
420 wake_up_interruptible(&self->query_wait);
424 * Function irda_discovery_timeout (priv)
426 * Timeout in the selective discovery process
428 * We were waiting for a node to be discovered, but nothing has come up
429 * so far. Wake up the user and tell him that we failed...
431 static void irda_discovery_timeout(u_long priv)
433 struct irda_sock *self;
435 self = (struct irda_sock *) priv;
436 BUG_ON(self == NULL);
438 /* Nothing for the caller */
439 self->cachelog = NULL;
440 self->cachedaddr = 0;
441 self->errno = -ETIME;
443 /* Wake up process if its still waiting... */
444 wake_up_interruptible(&self->query_wait);
448 * Function irda_open_tsap (self)
450 * Open local Transport Service Access Point (TSAP)
453 static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
458 pr_debug("%s: busy!\n", __func__);
462 /* Initialize callbacks to be used by the IrDA stack */
463 irda_notify_init(¬ify);
464 notify.connect_confirm = irda_connect_confirm;
465 notify.connect_indication = irda_connect_indication;
466 notify.disconnect_indication = irda_disconnect_indication;
467 notify.data_indication = irda_data_indication;
468 notify.udata_indication = irda_data_indication;
469 notify.flow_indication = irda_flow_indication;
470 notify.instance = self;
471 strncpy(notify.name, name, NOTIFY_MAX_NAME);
473 self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
475 if (self->tsap == NULL) {
476 pr_debug("%s(), Unable to allocate TSAP!\n",
480 /* Remember which TSAP selector we actually got */
481 self->stsap_sel = self->tsap->stsap_sel;
487 * Function irda_open_lsap (self)
489 * Open local Link Service Access Point (LSAP). Used for opening Ultra
492 #ifdef CONFIG_IRDA_ULTRA
493 static int irda_open_lsap(struct irda_sock *self, int pid)
498 net_warn_ratelimited("%s(), busy!\n", __func__);
502 /* Initialize callbacks to be used by the IrDA stack */
503 irda_notify_init(¬ify);
504 notify.udata_indication = irda_data_indication;
505 notify.instance = self;
506 strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
508 self->lsap = irlmp_open_lsap(LSAP_CONNLESS, ¬ify, pid);
509 if (self->lsap == NULL) {
510 pr_debug("%s(), Unable to allocate LSAP!\n", __func__);
516 #endif /* CONFIG_IRDA_ULTRA */
519 * Function irda_find_lsap_sel (self, name)
521 * Try to lookup LSAP selector in remote LM-IAS
523 * Basically, we start a IAP query, and then go to sleep. When the query
524 * return, irda_getvalue_confirm will wake us up, and we can examine the
525 * result of the query...
526 * Note that in some case, the query fail even before we go to sleep,
527 * creating some races...
529 static int irda_find_lsap_sel(struct irda_sock *self, char *name)
531 pr_debug("%s(%p, %s)\n", __func__, self, name);
534 net_warn_ratelimited("%s(): busy with a previous query\n",
539 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
540 irda_getvalue_confirm);
541 if(self->iriap == NULL)
544 /* Treat unexpected wakeup as disconnect */
545 self->errno = -EHOSTUNREACH;
547 /* Query remote LM-IAS */
548 iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
549 name, "IrDA:TinyTP:LsapSel");
551 /* Wait for answer, if not yet finished (or failed) */
552 if (wait_event_interruptible(self->query_wait, (self->iriap==NULL)))
553 /* Treat signals as disconnect */
554 return -EHOSTUNREACH;
556 /* Check what happened */
559 /* Requested object/attribute doesn't exist */
560 if((self->errno == IAS_CLASS_UNKNOWN) ||
561 (self->errno == IAS_ATTRIB_UNKNOWN))
562 return -EADDRNOTAVAIL;
564 return -EHOSTUNREACH;
567 /* Get the remote TSAP selector */
568 switch (self->ias_result->type) {
570 pr_debug("%s() int=%d\n",
571 __func__, self->ias_result->t.integer);
573 if (self->ias_result->t.integer != -1)
574 self->dtsap_sel = self->ias_result->t.integer;
580 pr_debug("%s(), bad type!\n", __func__);
583 if (self->ias_result)
584 irias_delete_value(self->ias_result);
589 return -EADDRNOTAVAIL;
593 * Function irda_discover_daddr_and_lsap_sel (self, name)
595 * This try to find a device with the requested service.
597 * It basically look into the discovery log. For each address in the list,
598 * it queries the LM-IAS of the device to find if this device offer
599 * the requested service.
600 * If there is more than one node supporting the service, we complain
601 * to the user (it should move devices around).
602 * The, we set both the destination address and the lsap selector to point
603 * on the service on the unique device we have found.
605 * Note : this function fails if there is more than one device in range,
606 * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
607 * Moreover, we would need to wait the LAP disconnection...
609 static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
611 discinfo_t *discoveries; /* Copy of the discovery log */
612 int number; /* Number of nodes in the log */
614 int err = -ENETUNREACH;
615 __u32 daddr = DEV_ADDR_ANY; /* Address we found the service on */
616 __u8 dtsap_sel = 0x0; /* TSAP associated with it */
618 pr_debug("%s(), name=%s\n", __func__, name);
620 /* Ask lmp for the current discovery log
621 * Note : we have to use irlmp_get_discoveries(), as opposed
622 * to play with the cachelog directly, because while we are
623 * making our ias query, le log might change... */
624 discoveries = irlmp_get_discoveries(&number, self->mask.word,
626 /* Check if the we got some results */
627 if (discoveries == NULL)
628 return -ENETUNREACH; /* No nodes discovered */
631 * Now, check all discovered devices (if any), and connect
632 * client only about the services that the client is
635 for(i = 0; i < number; i++) {
636 /* Try the address in the log */
637 self->daddr = discoveries[i].daddr;
639 pr_debug("%s(), trying daddr = %08x\n",
640 __func__, self->daddr);
642 /* Query remote LM-IAS for this service */
643 err = irda_find_lsap_sel(self, name);
646 /* We found the requested service */
647 if(daddr != DEV_ADDR_ANY) {
648 pr_debug("%s(), discovered service ''%s'' in two different devices !!!\n",
650 self->daddr = DEV_ADDR_ANY;
654 /* First time we found that one, save it ! */
656 dtsap_sel = self->dtsap_sel;
659 /* Requested service simply doesn't exist on this node */
662 /* Something bad did happen :-( */
663 pr_debug("%s(), unexpected IAS query failure\n",
665 self->daddr = DEV_ADDR_ANY;
667 return -EHOSTUNREACH;
670 /* Cleanup our copy of the discovery log */
673 /* Check out what we found */
674 if(daddr == DEV_ADDR_ANY) {
675 pr_debug("%s(), cannot discover service ''%s'' in any device !!!\n",
677 self->daddr = DEV_ADDR_ANY;
678 return -EADDRNOTAVAIL;
681 /* Revert back to discovered device & service */
684 self->dtsap_sel = dtsap_sel;
686 pr_debug("%s(), discovered requested service ''%s'' at address %08x\n",
687 __func__, name, self->daddr);
693 * Function irda_getname (sock, uaddr, uaddr_len, peer)
695 * Return the our own, or peers socket address (sockaddr_irda)
698 static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
699 int *uaddr_len, int peer)
701 struct sockaddr_irda saddr;
702 struct sock *sk = sock->sk;
703 struct irda_sock *self = irda_sk(sk);
705 memset(&saddr, 0, sizeof(saddr));
707 if (sk->sk_state != TCP_ESTABLISHED)
710 saddr.sir_family = AF_IRDA;
711 saddr.sir_lsap_sel = self->dtsap_sel;
712 saddr.sir_addr = self->daddr;
714 saddr.sir_family = AF_IRDA;
715 saddr.sir_lsap_sel = self->stsap_sel;
716 saddr.sir_addr = self->saddr;
719 pr_debug("%s(), tsap_sel = %#x\n", __func__, saddr.sir_lsap_sel);
720 pr_debug("%s(), addr = %08x\n", __func__, saddr.sir_addr);
722 /* uaddr_len come to us uninitialised */
723 *uaddr_len = sizeof (struct sockaddr_irda);
724 memcpy(uaddr, &saddr, *uaddr_len);
730 * Function irda_listen (sock, backlog)
732 * Just move to the listen state
735 static int irda_listen(struct socket *sock, int backlog)
737 struct sock *sk = sock->sk;
738 int err = -EOPNOTSUPP;
742 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
743 (sk->sk_type != SOCK_DGRAM))
746 if (sk->sk_state != TCP_LISTEN) {
747 sk->sk_max_ack_backlog = backlog;
748 sk->sk_state = TCP_LISTEN;
759 * Function irda_bind (sock, uaddr, addr_len)
761 * Used by servers to register their well known TSAP
764 static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
766 struct sock *sk = sock->sk;
767 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
768 struct irda_sock *self = irda_sk(sk);
771 pr_debug("%s(%p)\n", __func__, self);
773 if (addr_len != sizeof(struct sockaddr_irda))
778 /* Ensure that the socket is not already bound */
784 #ifdef CONFIG_IRDA_ULTRA
785 /* Special care for Ultra sockets */
786 if ((sk->sk_type == SOCK_DGRAM) &&
787 (sk->sk_protocol == IRDAPROTO_ULTRA)) {
788 self->pid = addr->sir_lsap_sel;
790 if (self->pid & 0x80) {
791 pr_debug("%s(), extension in PID not supp!\n",
795 err = irda_open_lsap(self, self->pid);
799 /* Pretend we are connected */
800 sock->state = SS_CONNECTED;
801 sk->sk_state = TCP_ESTABLISHED;
806 #endif /* CONFIG_IRDA_ULTRA */
808 self->ias_obj = irias_new_object(addr->sir_name, jiffies);
810 if (self->ias_obj == NULL)
813 err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
815 irias_delete_object(self->ias_obj);
816 self->ias_obj = NULL;
820 /* Register with LM-IAS */
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);
832 * Function irda_accept (sock, newsock, flags)
834 * Wait for incoming connection
837 static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
839 struct sock *sk = sock->sk;
840 struct irda_sock *new, *self = irda_sk(sk);
842 struct sk_buff *skb = NULL;
845 err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
852 if (sock->state != SS_UNCONNECTED)
855 if ((sk = sock->sk) == NULL)
859 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
860 (sk->sk_type != SOCK_DGRAM))
864 if (sk->sk_state != TCP_LISTEN)
868 * The read queue this time is holding sockets ready to use
869 * hooked into the SABM we saved
873 * We can perform the accept only if there is incoming data
874 * on the listening socket.
875 * So, we will block the caller until we receive any data.
876 * If the caller was waiting on select() or poll() before
877 * calling us, the data is waiting for us ;-)
881 skb = skb_dequeue(&sk->sk_receive_queue);
885 /* Non blocking operation */
887 if (flags & O_NONBLOCK)
890 err = wait_event_interruptible(*(sk_sleep(sk)),
891 skb_peek(&sk->sk_receive_queue));
901 newsk->sk_state = TCP_ESTABLISHED;
903 new = irda_sk(newsk);
905 /* Now attach up the new socket */
906 new->tsap = irttp_dup(self->tsap, new);
907 err = -EPERM; /* value does not seem to make sense. -arnd */
909 pr_debug("%s(), dup failed!\n", __func__);
913 new->stsap_sel = new->tsap->stsap_sel;
914 new->dtsap_sel = new->tsap->dtsap_sel;
915 new->saddr = irttp_get_saddr(new->tsap);
916 new->daddr = irttp_get_daddr(new->tsap);
918 new->max_sdu_size_tx = self->max_sdu_size_tx;
919 new->max_sdu_size_rx = self->max_sdu_size_rx;
920 new->max_data_size = self->max_data_size;
921 new->max_header_size = self->max_header_size;
923 memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
925 /* Clean up the original one to keep it in listen state */
926 irttp_listen(self->tsap);
928 sk->sk_ack_backlog--;
930 newsock->state = SS_CONNECTED;
932 irda_connect_response(new);
941 * Function irda_connect (sock, uaddr, addr_len, flags)
943 * Connect to a IrDA device
945 * The main difference with a "standard" connect is that with IrDA we need
946 * to resolve the service name into a TSAP selector (in TCP, port number
947 * doesn't have to be resolved).
948 * Because of this service name resolution, we can offer "auto-connect",
949 * where we connect to a service without specifying a destination address.
951 * Note : by consulting "errno", the user space caller may learn the cause
952 * of the failure. Most of them are visible in the function, others may come
953 * from subroutines called and are listed here :
954 * o EBUSY : already processing a connect
955 * o EHOSTUNREACH : bad addr->sir_addr argument
956 * o EADDRNOTAVAIL : bad addr->sir_name argument
957 * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
958 * o ENETUNREACH : no node found on the network (auto-connect)
960 static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
961 int addr_len, int flags)
963 struct sock *sk = sock->sk;
964 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
965 struct irda_sock *self = irda_sk(sk);
968 pr_debug("%s(%p)\n", __func__, self);
971 /* Don't allow connect for Ultra sockets */
972 err = -ESOCKTNOSUPPORT;
973 if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
976 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
977 sock->state = SS_CONNECTED;
979 goto out; /* Connect completed during a ERESTARTSYS event */
982 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
983 sock->state = SS_UNCONNECTED;
988 err = -EISCONN; /* No reconnect on a seqpacket socket */
989 if (sk->sk_state == TCP_ESTABLISHED)
992 sk->sk_state = TCP_CLOSE;
993 sock->state = SS_UNCONNECTED;
996 if (addr_len != sizeof(struct sockaddr_irda))
999 /* Check if user supplied any destination device address */
1000 if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
1001 /* Try to find one suitable */
1002 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
1004 pr_debug("%s(), auto-connect failed!\n", __func__);
1008 /* Use the one provided by the user */
1009 self->daddr = addr->sir_addr;
1010 pr_debug("%s(), daddr = %08x\n", __func__, self->daddr);
1012 /* If we don't have a valid service name, we assume the
1013 * user want to connect on a specific LSAP. Prevent
1014 * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
1015 if((addr->sir_name[0] != '\0') ||
1016 (addr->sir_lsap_sel >= 0x70)) {
1017 /* Query remote LM-IAS using service name */
1018 err = irda_find_lsap_sel(self, addr->sir_name);
1020 pr_debug("%s(), connect failed!\n", __func__);
1024 /* Directly connect to the remote LSAP
1025 * specified by the sir_lsap field.
1026 * Please use with caution, in IrDA LSAPs are
1027 * dynamic and there is no "well-known" LSAP. */
1028 self->dtsap_sel = addr->sir_lsap_sel;
1032 /* Check if we have opened a local TSAP */
1034 err = irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1039 /* Move to connecting socket, start sending Connect Requests */
1040 sock->state = SS_CONNECTING;
1041 sk->sk_state = TCP_SYN_SENT;
1043 /* Connect to remote device */
1044 err = irttp_connect_request(self->tsap, self->dtsap_sel,
1045 self->saddr, self->daddr, NULL,
1046 self->max_sdu_size_rx, NULL);
1048 pr_debug("%s(), connect failed!\n", __func__);
1054 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1058 if (wait_event_interruptible(*(sk_sleep(sk)),
1059 (sk->sk_state != TCP_SYN_SENT)))
1062 if (sk->sk_state != TCP_ESTABLISHED) {
1063 sock->state = SS_UNCONNECTED;
1064 err = sock_error(sk);
1070 sock->state = SS_CONNECTED;
1072 /* At this point, IrLMP has assigned our source address */
1073 self->saddr = irttp_get_saddr(self->tsap);
1080 static struct proto irda_proto = {
1082 .owner = THIS_MODULE,
1083 .obj_size = sizeof(struct irda_sock),
1087 * Function irda_create (sock, protocol)
1089 * Create IrDA socket
1092 static int irda_create(struct net *net, struct socket *sock, int protocol,
1096 struct irda_sock *self;
1098 if (protocol < 0 || protocol > SK_PROTOCOL_MAX)
1101 if (net != &init_net)
1102 return -EAFNOSUPPORT;
1104 /* Check for valid socket type */
1105 switch (sock->type) {
1106 case SOCK_STREAM: /* For TTP connections with SAR disabled */
1107 case SOCK_SEQPACKET: /* For TTP connections with SAR enabled */
1108 case SOCK_DGRAM: /* For TTP Unitdata or LMP Ultra transfers */
1111 return -ESOCKTNOSUPPORT;
1114 /* Allocate networking socket */
1115 sk = sk_alloc(net, PF_IRDA, GFP_KERNEL, &irda_proto, kern);
1120 pr_debug("%s() : self is %p\n", __func__, self);
1122 init_waitqueue_head(&self->query_wait);
1124 switch (sock->type) {
1126 sock->ops = &irda_stream_ops;
1127 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1129 case SOCK_SEQPACKET:
1130 sock->ops = &irda_seqpacket_ops;
1131 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1135 #ifdef CONFIG_IRDA_ULTRA
1136 case IRDAPROTO_ULTRA:
1137 sock->ops = &irda_ultra_ops;
1138 /* Initialise now, because we may send on unbound
1139 * sockets. Jean II */
1140 self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1141 self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1143 #endif /* CONFIG_IRDA_ULTRA */
1144 case IRDAPROTO_UNITDATA:
1145 sock->ops = &irda_dgram_ops;
1146 /* We let Unitdata conn. be like seqpack conn. */
1147 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1151 return -ESOCKTNOSUPPORT;
1156 return -ESOCKTNOSUPPORT;
1159 /* Initialise networking socket struct */
1160 sock_init_data(sock, sk); /* Note : set sk->sk_refcnt to 1 */
1161 sk->sk_family = PF_IRDA;
1162 sk->sk_protocol = protocol;
1164 /* Register as a client with IrLMP */
1165 self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1166 self->mask.word = 0xffff;
1167 self->rx_flow = self->tx_flow = FLOW_START;
1168 self->nslots = DISCOVERY_DEFAULT_SLOTS;
1169 self->daddr = DEV_ADDR_ANY; /* Until we get connected */
1170 self->saddr = 0x0; /* so IrLMP assign us any link */
1175 * Function irda_destroy_socket (self)
1180 static void irda_destroy_socket(struct irda_sock *self)
1182 pr_debug("%s(%p)\n", __func__, self);
1184 /* Unregister with IrLMP */
1185 irlmp_unregister_client(self->ckey);
1186 irlmp_unregister_service(self->skey);
1188 /* Unregister with LM-IAS */
1189 if (self->ias_obj) {
1190 irias_delete_object(self->ias_obj);
1191 self->ias_obj = NULL;
1195 iriap_close(self->iriap);
1200 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1201 irttp_close_tsap(self->tsap);
1204 #ifdef CONFIG_IRDA_ULTRA
1206 irlmp_close_lsap(self->lsap);
1209 #endif /* CONFIG_IRDA_ULTRA */
1213 * Function irda_release (sock)
1215 static int irda_release(struct socket *sock)
1217 struct sock *sk = sock->sk;
1223 sk->sk_state = TCP_CLOSE;
1224 sk->sk_shutdown |= SEND_SHUTDOWN;
1225 sk->sk_state_change(sk);
1227 /* Destroy IrDA socket */
1228 irda_destroy_socket(irda_sk(sk));
1234 /* Purge queues (see sock_init_data()) */
1235 skb_queue_purge(&sk->sk_receive_queue);
1237 /* Destroy networking socket if we are the last reference on it,
1238 * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1241 /* Notes on socket locking and deallocation... - Jean II
1242 * In theory we should put pairs of sock_hold() / sock_put() to
1243 * prevent the socket to be destroyed whenever there is an
1244 * outstanding request or outstanding incoming packet or event.
1246 * 1) This may include IAS request, both in connect and getsockopt.
1247 * Unfortunately, the situation is a bit more messy than it looks,
1248 * because we close iriap and kfree(self) above.
1250 * 2) This may include selective discovery in getsockopt.
1251 * Same stuff as above, irlmp registration and self are gone.
1253 * Probably 1 and 2 may not matter, because it's all triggered
1254 * by a process and the socket layer already prevent the
1255 * socket to go away while a process is holding it, through
1256 * sockfd_put() and fput()...
1258 * 3) This may include deferred TSAP closure. In particular,
1259 * we may receive a late irda_disconnect_indication()
1260 * Fortunately, (tsap_cb *)->close_pend should protect us
1263 * I did some testing on SMP, and it looks solid. And the socket
1264 * memory leak is now gone... - Jean II
1271 * Function irda_sendmsg (sock, msg, len)
1273 * Send message down to TinyTP. This function is used for both STREAM and
1274 * SEQPACK services. This is possible since it forces the client to
1275 * fragment the message if necessary
1277 static int irda_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1279 struct sock *sk = sock->sk;
1280 struct irda_sock *self;
1281 struct sk_buff *skb;
1284 pr_debug("%s(), len=%zd\n", __func__, len);
1286 /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1287 if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
1294 if (sk->sk_shutdown & SEND_SHUTDOWN)
1297 if (sk->sk_state != TCP_ESTABLISHED) {
1304 /* Check if IrTTP is wants us to slow down */
1306 if (wait_event_interruptible(*(sk_sleep(sk)),
1307 (self->tx_flow != FLOW_STOP || sk->sk_state != TCP_ESTABLISHED))) {
1312 /* Check if we are still connected */
1313 if (sk->sk_state != TCP_ESTABLISHED) {
1318 /* Check that we don't send out too big frames */
1319 if (len > self->max_data_size) {
1320 pr_debug("%s(), Chopping frame from %zd to %d bytes!\n",
1321 __func__, len, self->max_data_size);
1322 len = self->max_data_size;
1325 skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
1326 msg->msg_flags & MSG_DONTWAIT, &err);
1330 skb_reserve(skb, self->max_header_size + 16);
1331 skb_reset_transport_header(skb);
1333 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1340 * Just send the message to TinyTP, and let it deal with possible
1341 * errors. No need to duplicate all that here
1343 err = irttp_data_request(self->tsap, skb);
1345 pr_debug("%s(), err=%d\n", __func__, err);
1350 /* Tell client how much data we actually sent */
1354 err = sk_stream_error(sk, msg->msg_flags, err);
1362 * Function irda_recvmsg_dgram (sock, msg, size, flags)
1364 * Try to receive message and copy it to user. The frame is discarded
1365 * after being read, regardless of how much the user actually read
1367 static int irda_recvmsg_dgram(struct socket *sock, struct msghdr *msg,
1368 size_t size, int flags)
1370 struct sock *sk = sock->sk;
1371 struct irda_sock *self = irda_sk(sk);
1372 struct sk_buff *skb;
1376 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1377 flags & MSG_DONTWAIT, &err);
1381 skb_reset_transport_header(skb);
1384 if (copied > size) {
1385 pr_debug("%s(), Received truncated frame (%zd < %zd)!\n",
1386 __func__, copied, size);
1388 msg->msg_flags |= MSG_TRUNC;
1390 skb_copy_datagram_msg(skb, 0, msg, copied);
1392 skb_free_datagram(sk, skb);
1395 * Check if we have previously stopped IrTTP and we know
1396 * have more free space in our rx_queue. If so tell IrTTP
1397 * to start delivering frames again before our rx_queue gets
1400 if (self->rx_flow == FLOW_STOP) {
1401 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1402 pr_debug("%s(), Starting IrTTP\n", __func__);
1403 self->rx_flow = FLOW_START;
1404 irttp_flow_request(self->tsap, FLOW_START);
1412 * Function irda_recvmsg_stream (sock, msg, size, flags)
1414 static int irda_recvmsg_stream(struct socket *sock, struct msghdr *msg,
1415 size_t size, int flags)
1417 struct sock *sk = sock->sk;
1418 struct irda_sock *self = irda_sk(sk);
1419 int noblock = flags & MSG_DONTWAIT;
1424 if ((err = sock_error(sk)) < 0)
1427 if (sock->flags & __SO_ACCEPTCON)
1431 if (flags & MSG_OOB)
1435 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1436 timeo = sock_rcvtimeo(sk, noblock);
1440 struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1446 if (copied >= target)
1449 prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1452 * POSIX 1003.1g mandates this order.
1454 err = sock_error(sk);
1457 else if (sk->sk_shutdown & RCV_SHUTDOWN)
1461 else if (signal_pending(current))
1462 err = sock_intr_errno(timeo);
1463 else if (sk->sk_state != TCP_ESTABLISHED)
1465 else if (skb_peek(&sk->sk_receive_queue) == NULL)
1466 /* Wait process until data arrives */
1469 finish_wait(sk_sleep(sk), &wait);
1473 if (sk->sk_shutdown & RCV_SHUTDOWN)
1479 chunk = min_t(unsigned int, skb->len, size);
1480 if (memcpy_to_msg(msg, skb->data, chunk)) {
1481 skb_queue_head(&sk->sk_receive_queue, skb);
1489 /* Mark read part of skb as used */
1490 if (!(flags & MSG_PEEK)) {
1491 skb_pull(skb, chunk);
1493 /* put the skb back if we didn't use it up.. */
1495 pr_debug("%s(), back on q!\n",
1497 skb_queue_head(&sk->sk_receive_queue, skb);
1503 pr_debug("%s() questionable!?\n", __func__);
1505 /* put message back and return */
1506 skb_queue_head(&sk->sk_receive_queue, skb);
1512 * Check if we have previously stopped IrTTP and we know
1513 * have more free space in our rx_queue. If so tell IrTTP
1514 * to start delivering frames again before our rx_queue gets
1517 if (self->rx_flow == FLOW_STOP) {
1518 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1519 pr_debug("%s(), Starting IrTTP\n", __func__);
1520 self->rx_flow = FLOW_START;
1521 irttp_flow_request(self->tsap, FLOW_START);
1529 * Function irda_sendmsg_dgram (sock, msg, len)
1531 * Send message down to TinyTP for the unreliable sequenced
1535 static int irda_sendmsg_dgram(struct socket *sock, struct msghdr *msg,
1538 struct sock *sk = sock->sk;
1539 struct irda_sock *self;
1540 struct sk_buff *skb;
1543 pr_debug("%s(), len=%zd\n", __func__, len);
1545 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1550 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1551 send_sig(SIGPIPE, current, 0);
1557 if (sk->sk_state != TCP_ESTABLISHED)
1563 * Check that we don't send out too big frames. This is an unreliable
1564 * service, so we have no fragmentation and no coalescence
1566 if (len > self->max_data_size) {
1567 pr_debug("%s(), Warning too much data! Chopping frame from %zd to %d bytes!\n",
1568 __func__, len, self->max_data_size);
1569 len = self->max_data_size;
1572 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1573 msg->msg_flags & MSG_DONTWAIT, &err);
1578 skb_reserve(skb, self->max_header_size);
1579 skb_reset_transport_header(skb);
1581 pr_debug("%s(), appending user data\n", __func__);
1583 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1590 * Just send the message to TinyTP, and let it deal with possible
1591 * errors. No need to duplicate all that here
1593 err = irttp_udata_request(self->tsap, skb);
1595 pr_debug("%s(), err=%d\n", __func__, err);
1608 * Function irda_sendmsg_ultra (sock, msg, len)
1610 * Send message down to IrLMP for the unreliable Ultra
1613 #ifdef CONFIG_IRDA_ULTRA
1614 static int irda_sendmsg_ultra(struct socket *sock, struct msghdr *msg,
1617 struct sock *sk = sock->sk;
1618 struct irda_sock *self;
1621 struct sk_buff *skb;
1624 pr_debug("%s(), len=%zd\n", __func__, len);
1627 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1633 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1634 send_sig(SIGPIPE, current, 0);
1640 /* Check if an address was specified with sendto. Jean II */
1641 if (msg->msg_name) {
1642 DECLARE_SOCKADDR(struct sockaddr_irda *, addr, msg->msg_name);
1644 /* Check address, extract pid. Jean II */
1645 if (msg->msg_namelen < sizeof(*addr))
1647 if (addr->sir_family != AF_IRDA)
1650 pid = addr->sir_lsap_sel;
1652 pr_debug("%s(), extension in PID not supp!\n",
1658 /* Check that the socket is properly bound to an Ultra
1660 if ((self->lsap == NULL) ||
1661 (sk->sk_state != TCP_ESTABLISHED)) {
1662 pr_debug("%s(), socket not bound to Ultra PID.\n",
1667 /* Use PID from socket */
1672 * Check that we don't send out too big frames. This is an unreliable
1673 * service, so we have no fragmentation and no coalescence
1675 if (len > self->max_data_size) {
1676 pr_debug("%s(), Warning too much data! Chopping frame from %zd to %d bytes!\n",
1677 __func__, len, self->max_data_size);
1678 len = self->max_data_size;
1681 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1682 msg->msg_flags & MSG_DONTWAIT, &err);
1687 skb_reserve(skb, self->max_header_size);
1688 skb_reset_transport_header(skb);
1690 pr_debug("%s(), appending user data\n", __func__);
1692 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1698 err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1701 pr_debug("%s(), err=%d\n", __func__, err);
1706 #endif /* CONFIG_IRDA_ULTRA */
1709 * Function irda_shutdown (sk, how)
1711 static int irda_shutdown(struct socket *sock, int how)
1713 struct sock *sk = sock->sk;
1714 struct irda_sock *self = irda_sk(sk);
1716 pr_debug("%s(%p)\n", __func__, self);
1720 sk->sk_state = TCP_CLOSE;
1721 sk->sk_shutdown |= SEND_SHUTDOWN;
1722 sk->sk_state_change(sk);
1725 iriap_close(self->iriap);
1730 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1731 irttp_close_tsap(self->tsap);
1735 /* A few cleanup so the socket look as good as new... */
1736 self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */
1737 self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */
1738 self->saddr = 0x0; /* so IrLMP assign us any link */
1746 * Function irda_poll (file, sock, wait)
1748 static unsigned int irda_poll(struct file * file, struct socket *sock,
1751 struct sock *sk = sock->sk;
1752 struct irda_sock *self = irda_sk(sk);
1755 poll_wait(file, sk_sleep(sk), wait);
1758 /* Exceptional events? */
1761 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1762 pr_debug("%s(), POLLHUP\n", __func__);
1767 if (!skb_queue_empty(&sk->sk_receive_queue)) {
1768 pr_debug("Socket is readable\n");
1769 mask |= POLLIN | POLLRDNORM;
1772 /* Connection-based need to check for termination and startup */
1773 switch (sk->sk_type) {
1775 if (sk->sk_state == TCP_CLOSE) {
1776 pr_debug("%s(), POLLHUP\n", __func__);
1780 if (sk->sk_state == TCP_ESTABLISHED) {
1781 if ((self->tx_flow == FLOW_START) &&
1784 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1788 case SOCK_SEQPACKET:
1789 if ((self->tx_flow == FLOW_START) &&
1792 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1796 if (sock_writeable(sk))
1797 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1807 * Function irda_ioctl (sock, cmd, arg)
1809 static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1811 struct sock *sk = sock->sk;
1814 pr_debug("%s(), cmd=%#x\n", __func__, cmd);
1821 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1824 err = put_user(amount, (unsigned int __user *)arg);
1829 struct sk_buff *skb;
1831 /* These two are safe on a single CPU system as only user tasks fiddle here */
1832 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1834 err = put_user(amount, (unsigned int __user *)arg);
1840 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
1845 case SIOCGIFDSTADDR:
1846 case SIOCSIFDSTADDR:
1847 case SIOCGIFBRDADDR:
1848 case SIOCSIFBRDADDR:
1849 case SIOCGIFNETMASK:
1850 case SIOCSIFNETMASK:
1855 pr_debug("%s(), doing device ioctl!\n", __func__);
1862 #ifdef CONFIG_COMPAT
1864 * Function irda_ioctl (sock, cmd, arg)
1866 static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1869 * All IRDA's ioctl are standard ones.
1871 return -ENOIOCTLCMD;
1876 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1878 * Set some options for the socket
1881 static int irda_setsockopt(struct socket *sock, int level, int optname,
1882 char __user *optval, unsigned int optlen)
1884 struct sock *sk = sock->sk;
1885 struct irda_sock *self = irda_sk(sk);
1886 struct irda_ias_set *ias_opt;
1887 struct ias_object *ias_obj;
1888 struct ias_attrib * ias_attr; /* Attribute in IAS object */
1889 int opt, free_ias = 0, err = 0;
1891 pr_debug("%s(%p)\n", __func__, self);
1893 if (level != SOL_IRLMP)
1894 return -ENOPROTOOPT;
1900 /* The user want to add an attribute to an existing IAS object
1901 * (in the IAS database) or to create a new object with this
1903 * We first query IAS to know if the object exist, and then
1904 * create the right attribute...
1907 if (optlen != sizeof(struct irda_ias_set)) {
1912 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1913 if (ias_opt == NULL) {
1918 /* Copy query to the driver. */
1919 if (copy_from_user(ias_opt, optval, optlen)) {
1925 /* Find the object we target.
1926 * If the user gives us an empty string, we use the object
1927 * associated with this socket. This will workaround
1928 * duplicated class name - Jean II */
1929 if(ias_opt->irda_class_name[0] == '\0') {
1930 if(self->ias_obj == NULL) {
1935 ias_obj = self->ias_obj;
1937 ias_obj = irias_find_object(ias_opt->irda_class_name);
1939 /* Only ROOT can mess with the global IAS database.
1940 * Users can only add attributes to the object associated
1941 * with the socket they own - Jean II */
1942 if((!capable(CAP_NET_ADMIN)) &&
1943 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1949 /* If the object doesn't exist, create it */
1950 if(ias_obj == (struct ias_object *) NULL) {
1951 /* Create a new object */
1952 ias_obj = irias_new_object(ias_opt->irda_class_name,
1954 if (ias_obj == NULL) {
1962 /* Do we have the attribute already ? */
1963 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1966 kfree(ias_obj->name);
1973 /* Look at the type */
1974 switch(ias_opt->irda_attrib_type) {
1976 /* Add an integer attribute */
1977 irias_add_integer_attrib(
1979 ias_opt->irda_attrib_name,
1980 ias_opt->attribute.irda_attrib_int,
1985 if(ias_opt->attribute.irda_attrib_octet_seq.len >
1986 IAS_MAX_OCTET_STRING) {
1989 kfree(ias_obj->name);
1996 /* Add an octet sequence attribute */
1997 irias_add_octseq_attrib(
1999 ias_opt->irda_attrib_name,
2000 ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2001 ias_opt->attribute.irda_attrib_octet_seq.len,
2005 /* Should check charset & co */
2007 /* The length is encoded in a __u8, and
2008 * IAS_MAX_STRING == 256, so there is no way
2009 * userspace can pass us a string too large.
2011 /* NULL terminate the string (avoid troubles) */
2012 ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
2013 /* Add a string attribute */
2014 irias_add_string_attrib(
2016 ias_opt->irda_attrib_name,
2017 ias_opt->attribute.irda_attrib_string.string,
2023 kfree(ias_obj->name);
2030 /* Only insert newly allocated objects */
2032 irias_insert_object(ias_obj);
2037 /* The user want to delete an object from our local IAS
2038 * database. We just need to query the IAS, check is the
2039 * object is not owned by the kernel and delete it.
2042 if (optlen != sizeof(struct irda_ias_set)) {
2047 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2048 if (ias_opt == NULL) {
2053 /* Copy query to the driver. */
2054 if (copy_from_user(ias_opt, optval, optlen)) {
2060 /* Find the object we target.
2061 * If the user gives us an empty string, we use the object
2062 * associated with this socket. This will workaround
2063 * duplicated class name - Jean II */
2064 if(ias_opt->irda_class_name[0] == '\0')
2065 ias_obj = self->ias_obj;
2067 ias_obj = irias_find_object(ias_opt->irda_class_name);
2068 if(ias_obj == (struct ias_object *) NULL) {
2074 /* Only ROOT can mess with the global IAS database.
2075 * Users can only del attributes from the object associated
2076 * with the socket they own - Jean II */
2077 if((!capable(CAP_NET_ADMIN)) &&
2078 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2084 /* Find the attribute (in the object) we target */
2085 ias_attr = irias_find_attrib(ias_obj,
2086 ias_opt->irda_attrib_name);
2087 if(ias_attr == (struct ias_attrib *) NULL) {
2093 /* Check is the user space own the object */
2094 if(ias_attr->value->owner != IAS_USER_ATTR) {
2095 pr_debug("%s(), attempting to delete a kernel attribute\n",
2102 /* Remove the attribute (and maybe the object) */
2103 irias_delete_attrib(ias_obj, ias_attr, 1);
2106 case IRLMP_MAX_SDU_SIZE:
2107 if (optlen < sizeof(int)) {
2112 if (get_user(opt, (int __user *)optval)) {
2117 /* Only possible for a seqpacket service (TTP with SAR) */
2118 if (sk->sk_type != SOCK_SEQPACKET) {
2119 pr_debug("%s(), setting max_sdu_size = %d\n",
2121 self->max_sdu_size_rx = opt;
2123 net_warn_ratelimited("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2129 case IRLMP_HINTS_SET:
2130 if (optlen < sizeof(int)) {
2135 /* The input is really a (__u8 hints[2]), easier as an int */
2136 if (get_user(opt, (int __user *)optval)) {
2141 /* Unregister any old registration */
2142 irlmp_unregister_service(self->skey);
2144 self->skey = irlmp_register_service((__u16) opt);
2146 case IRLMP_HINT_MASK_SET:
2147 /* As opposed to the previous case which set the hint bits
2148 * that we advertise, this one set the filter we use when
2149 * making a discovery (nodes which don't match any hint
2150 * bit in the mask are not reported).
2152 if (optlen < sizeof(int)) {
2157 /* The input is really a (__u8 hints[2]), easier as an int */
2158 if (get_user(opt, (int __user *)optval)) {
2163 /* Set the new hint mask */
2164 self->mask.word = (__u16) opt;
2165 /* Mask out extension bits */
2166 self->mask.word &= 0x7f7f;
2167 /* Check if no bits */
2168 if(!self->mask.word)
2169 self->mask.word = 0xFFFF;
2184 * Function irda_extract_ias_value(ias_opt, ias_value)
2186 * Translate internal IAS value structure to the user space representation
2188 * The external representation of IAS values, as we exchange them with
2189 * user space program is quite different from the internal representation,
2190 * as stored in the IAS database (because we need a flat structure for
2191 * crossing kernel boundary).
2192 * This function transform the former in the latter. We also check
2193 * that the value type is valid.
2195 static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2196 struct ias_value *ias_value)
2198 /* Look at the type */
2199 switch (ias_value->type) {
2201 /* Copy the integer */
2202 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2206 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2208 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2209 ias_value->t.oct_seq, ias_value->len);
2213 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2214 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2216 memcpy(ias_opt->attribute.irda_attrib_string.string,
2217 ias_value->t.string, ias_value->len);
2218 /* NULL terminate the string (avoid troubles) */
2219 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2226 /* Copy type over */
2227 ias_opt->irda_attrib_type = ias_value->type;
2233 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2235 static int irda_getsockopt(struct socket *sock, int level, int optname,
2236 char __user *optval, int __user *optlen)
2238 struct sock *sk = sock->sk;
2239 struct irda_sock *self = irda_sk(sk);
2240 struct irda_device_list list = { 0 };
2241 struct irda_device_info *discoveries;
2242 struct irda_ias_set * ias_opt; /* IAS get/query params */
2243 struct ias_object * ias_obj; /* Object in IAS */
2244 struct ias_attrib * ias_attr; /* Attribute in IAS object */
2245 int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */
2251 pr_debug("%s(%p)\n", __func__, self);
2253 if (level != SOL_IRLMP)
2254 return -ENOPROTOOPT;
2256 if (get_user(len, optlen))
2265 case IRLMP_ENUMDEVICES:
2267 /* Offset to first device entry */
2268 offset = sizeof(struct irda_device_list) -
2269 sizeof(struct irda_device_info);
2276 /* Ask lmp for the current discovery log */
2277 discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2279 /* Check if the we got some results */
2280 if (discoveries == NULL) {
2282 goto out; /* Didn't find any devices */
2285 /* Write total list length back to client */
2286 if (copy_to_user(optval, &list, offset))
2289 /* Copy the list itself - watch for overflow */
2290 if (list.len > 2048) {
2294 total = offset + (list.len * sizeof(struct irda_device_info));
2297 if (copy_to_user(optval+offset, discoveries, total - offset))
2300 /* Write total number of bytes used back to client */
2301 if (put_user(total, optlen))
2304 /* Free up our buffer */
2307 case IRLMP_MAX_SDU_SIZE:
2308 val = self->max_data_size;
2310 if (put_user(len, optlen)) {
2315 if (copy_to_user(optval, &val, len)) {
2322 /* The user want an object from our local IAS database.
2323 * We just need to query the IAS and return the value
2326 /* Check that the user has allocated the right space for us */
2327 if (len != sizeof(struct irda_ias_set)) {
2332 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2333 if (ias_opt == NULL) {
2338 /* Copy query to the driver. */
2339 if (copy_from_user(ias_opt, optval, len)) {
2345 /* Find the object we target.
2346 * If the user gives us an empty string, we use the object
2347 * associated with this socket. This will workaround
2348 * duplicated class name - Jean II */
2349 if(ias_opt->irda_class_name[0] == '\0')
2350 ias_obj = self->ias_obj;
2352 ias_obj = irias_find_object(ias_opt->irda_class_name);
2353 if(ias_obj == (struct ias_object *) NULL) {
2359 /* Find the attribute (in the object) we target */
2360 ias_attr = irias_find_attrib(ias_obj,
2361 ias_opt->irda_attrib_name);
2362 if(ias_attr == (struct ias_attrib *) NULL) {
2368 /* Translate from internal to user structure */
2369 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2375 /* Copy reply to the user */
2376 if (copy_to_user(optval, ias_opt,
2377 sizeof(struct irda_ias_set))) {
2382 /* Note : don't need to put optlen, we checked it */
2385 case IRLMP_IAS_QUERY:
2386 /* The user want an object from a remote IAS database.
2387 * We need to use IAP to query the remote database and
2388 * then wait for the answer to come back. */
2390 /* Check that the user has allocated the right space for us */
2391 if (len != sizeof(struct irda_ias_set)) {
2396 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2397 if (ias_opt == NULL) {
2402 /* Copy query to the driver. */
2403 if (copy_from_user(ias_opt, optval, len)) {
2409 /* At this point, there are two cases...
2410 * 1) the socket is connected - that's the easy case, we
2411 * just query the device we are connected to...
2412 * 2) the socket is not connected - the user doesn't want
2413 * to connect and/or may not have a valid service name
2414 * (so can't create a fake connection). In this case,
2415 * we assume that the user pass us a valid destination
2416 * address in the requesting structure...
2418 if(self->daddr != DEV_ADDR_ANY) {
2419 /* We are connected - reuse known daddr */
2420 daddr = self->daddr;
2422 /* We are not connected, we must specify a valid
2423 * destination address */
2424 daddr = ias_opt->daddr;
2425 if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2432 /* Check that we can proceed with IAP */
2434 net_warn_ratelimited("%s: busy with a previous query\n",
2441 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2442 irda_getvalue_confirm);
2444 if (self->iriap == NULL) {
2450 /* Treat unexpected wakeup as disconnect */
2451 self->errno = -EHOSTUNREACH;
2453 /* Query remote LM-IAS */
2454 iriap_getvaluebyclass_request(self->iriap,
2456 ias_opt->irda_class_name,
2457 ias_opt->irda_attrib_name);
2459 /* Wait for answer, if not yet finished (or failed) */
2460 if (wait_event_interruptible(self->query_wait,
2461 (self->iriap == NULL))) {
2462 /* pending request uses copy of ias_opt-content
2463 * we can free it regardless! */
2465 /* Treat signals as disconnect */
2466 err = -EHOSTUNREACH;
2470 /* Check what happened */
2474 /* Requested object/attribute doesn't exist */
2475 if((self->errno == IAS_CLASS_UNKNOWN) ||
2476 (self->errno == IAS_ATTRIB_UNKNOWN))
2477 err = -EADDRNOTAVAIL;
2479 err = -EHOSTUNREACH;
2484 /* Translate from internal to user structure */
2485 err = irda_extract_ias_value(ias_opt, self->ias_result);
2486 if (self->ias_result)
2487 irias_delete_value(self->ias_result);
2493 /* Copy reply to the user */
2494 if (copy_to_user(optval, ias_opt,
2495 sizeof(struct irda_ias_set))) {
2500 /* Note : don't need to put optlen, we checked it */
2503 case IRLMP_WAITDEVICE:
2504 /* This function is just another way of seeing life ;-)
2505 * IRLMP_ENUMDEVICES assumes that you have a static network,
2506 * and that you just want to pick one of the devices present.
2507 * On the other hand, in here we assume that no device is
2508 * present and that at some point in the future a device will
2509 * come into range. When this device arrive, we just wake
2510 * up the caller, so that he has time to connect to it before
2511 * the device goes away...
2512 * Note : once the node has been discovered for more than a
2513 * few second, it won't trigger this function, unless it
2514 * goes away and come back changes its hint bits (so we
2515 * might call it IRLMP_WAITNEWDEVICE).
2518 /* Check that the user is passing us an int */
2519 if (len != sizeof(int)) {
2523 /* Get timeout in ms (max time we block the caller) */
2524 if (get_user(val, (int __user *)optval)) {
2529 /* Tell IrLMP we want to be notified */
2530 irlmp_update_client(self->ckey, self->mask.word,
2531 irda_selective_discovery_indication,
2532 NULL, (void *) self);
2534 /* Do some discovery (and also return cached results) */
2535 irlmp_discovery_request(self->nslots);
2537 /* Wait until a node is discovered */
2538 if (!self->cachedaddr) {
2539 pr_debug("%s(), nothing discovered yet, going to sleep...\n",
2542 /* Set watchdog timer to expire in <val> ms. */
2544 setup_timer(&self->watchdog, irda_discovery_timeout,
2545 (unsigned long)self);
2546 mod_timer(&self->watchdog,
2547 jiffies + msecs_to_jiffies(val));
2549 /* Wait for IR-LMP to call us back */
2550 err = __wait_event_interruptible(self->query_wait,
2551 (self->cachedaddr != 0 || self->errno == -ETIME));
2553 /* If watchdog is still activated, kill it! */
2554 del_timer(&(self->watchdog));
2556 pr_debug("%s(), ...waking up !\n", __func__);
2562 pr_debug("%s(), found immediately !\n",
2565 /* Tell IrLMP that we have been notified */
2566 irlmp_update_client(self->ckey, self->mask.word,
2569 /* Check if the we got some results */
2570 if (!self->cachedaddr) {
2571 err = -EAGAIN; /* Didn't find any devices */
2574 daddr = self->cachedaddr;
2576 self->cachedaddr = 0;
2578 /* We return the daddr of the device that trigger the
2579 * wakeup. As irlmp pass us only the new devices, we
2580 * are sure that it's not an old device.
2581 * If the user want more details, he should query
2582 * the whole discovery log and pick one device...
2584 if (put_user(daddr, (int __user *)optval)) {
2601 static const struct net_proto_family irda_family_ops = {
2603 .create = irda_create,
2604 .owner = THIS_MODULE,
2607 static const struct proto_ops irda_stream_ops = {
2609 .owner = THIS_MODULE,
2610 .release = irda_release,
2612 .connect = irda_connect,
2613 .socketpair = sock_no_socketpair,
2614 .accept = irda_accept,
2615 .getname = irda_getname,
2617 .ioctl = irda_ioctl,
2618 #ifdef CONFIG_COMPAT
2619 .compat_ioctl = irda_compat_ioctl,
2621 .listen = irda_listen,
2622 .shutdown = irda_shutdown,
2623 .setsockopt = irda_setsockopt,
2624 .getsockopt = irda_getsockopt,
2625 .sendmsg = irda_sendmsg,
2626 .recvmsg = irda_recvmsg_stream,
2627 .mmap = sock_no_mmap,
2628 .sendpage = sock_no_sendpage,
2631 static const struct proto_ops irda_seqpacket_ops = {
2633 .owner = THIS_MODULE,
2634 .release = irda_release,
2636 .connect = irda_connect,
2637 .socketpair = sock_no_socketpair,
2638 .accept = irda_accept,
2639 .getname = irda_getname,
2640 .poll = datagram_poll,
2641 .ioctl = irda_ioctl,
2642 #ifdef CONFIG_COMPAT
2643 .compat_ioctl = irda_compat_ioctl,
2645 .listen = irda_listen,
2646 .shutdown = irda_shutdown,
2647 .setsockopt = irda_setsockopt,
2648 .getsockopt = irda_getsockopt,
2649 .sendmsg = irda_sendmsg,
2650 .recvmsg = irda_recvmsg_dgram,
2651 .mmap = sock_no_mmap,
2652 .sendpage = sock_no_sendpage,
2655 static const struct proto_ops irda_dgram_ops = {
2657 .owner = THIS_MODULE,
2658 .release = irda_release,
2660 .connect = irda_connect,
2661 .socketpair = sock_no_socketpair,
2662 .accept = irda_accept,
2663 .getname = irda_getname,
2664 .poll = datagram_poll,
2665 .ioctl = irda_ioctl,
2666 #ifdef CONFIG_COMPAT
2667 .compat_ioctl = irda_compat_ioctl,
2669 .listen = irda_listen,
2670 .shutdown = irda_shutdown,
2671 .setsockopt = irda_setsockopt,
2672 .getsockopt = irda_getsockopt,
2673 .sendmsg = irda_sendmsg_dgram,
2674 .recvmsg = irda_recvmsg_dgram,
2675 .mmap = sock_no_mmap,
2676 .sendpage = sock_no_sendpage,
2679 #ifdef CONFIG_IRDA_ULTRA
2680 static const struct proto_ops irda_ultra_ops = {
2682 .owner = THIS_MODULE,
2683 .release = irda_release,
2685 .connect = sock_no_connect,
2686 .socketpair = sock_no_socketpair,
2687 .accept = sock_no_accept,
2688 .getname = irda_getname,
2689 .poll = datagram_poll,
2690 .ioctl = irda_ioctl,
2691 #ifdef CONFIG_COMPAT
2692 .compat_ioctl = irda_compat_ioctl,
2694 .listen = sock_no_listen,
2695 .shutdown = irda_shutdown,
2696 .setsockopt = irda_setsockopt,
2697 .getsockopt = irda_getsockopt,
2698 .sendmsg = irda_sendmsg_ultra,
2699 .recvmsg = irda_recvmsg_dgram,
2700 .mmap = sock_no_mmap,
2701 .sendpage = sock_no_sendpage,
2703 #endif /* CONFIG_IRDA_ULTRA */
2706 * Function irsock_init (pro)
2708 * Initialize IrDA protocol
2711 int __init irsock_init(void)
2713 int rc = proto_register(&irda_proto, 0);
2716 rc = sock_register(&irda_family_ops);
2722 * Function irsock_cleanup (void)
2724 * Remove IrDA protocol
2727 void irsock_cleanup(void)
2729 sock_unregister(PF_IRDA);
2730 proto_unregister(&irda_proto);