af_irda.c 66.4 KB
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/*********************************************************************
 *
 * Filename:      af_irda.c
 * Version:       0.9
 * Description:   IrDA sockets implementation
 * Status:        Stable
 * Author:        Dag Brattli <dagb@cs.uit.no>
 * Created at:    Sun May 31 10:12:43 1998
 * Modified at:   Sat Dec 25 21:10:23 1999
 * Modified by:   Dag Brattli <dag@brattli.net>
 * Sources:       af_netroom.c, af_ax25.c, af_rose.c, af_x25.c etc.
 *
 *     Copyright (c) 1999 Dag Brattli <dagb@cs.uit.no>
 *     Copyright (c) 1999-2003 Jean Tourrilhes <jt@hpl.hp.com>
 *     All Rights Reserved.
 *
 *     This program is free software; you can redistribute it and/or
 *     modify it under the terms of the GNU General Public License as
 *     published by the Free Software Foundation; either version 2 of
 *     the License, or (at your option) any later version.
 *
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
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 *     along with this program; if not, see <http://www.gnu.org/licenses/>.
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 *
 *     Linux-IrDA now supports four different types of IrDA sockets:
 *
 *     o SOCK_STREAM:    TinyTP connections with SAR disabled. The
 *                       max SDU size is 0 for conn. of this type
 *     o SOCK_SEQPACKET: TinyTP connections with SAR enabled. TTP may
 *                       fragment the messages, but will preserve
 *                       the message boundaries
 *     o SOCK_DGRAM:     IRDAPROTO_UNITDATA: TinyTP connections with Unitdata
 *                       (unreliable) transfers
 *                       IRDAPROTO_ULTRA: Connectionless and unreliable data
 *
 ********************************************************************/

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#include <linux/capability.h>
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#include <linux/module.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/sockios.h>
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#include <linux/slab.h>
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#include <linux/init.h>
#include <linux/net.h>
#include <linux/irda.h>
#include <linux/poll.h>

#include <asm/ioctls.h>		/* TIOCOUTQ, TIOCINQ */
#include <asm/uaccess.h>

#include <net/sock.h>
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#include <net/tcp_states.h>
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#include <net/irda/af_irda.h>

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static int irda_create(struct net *net, struct socket *sock, int protocol, int kern);
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static const struct proto_ops irda_stream_ops;
static const struct proto_ops irda_seqpacket_ops;
static const struct proto_ops irda_dgram_ops;
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#ifdef CONFIG_IRDA_ULTRA
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static const struct proto_ops irda_ultra_ops;
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#define ULTRA_MAX_DATA 382
#endif /* CONFIG_IRDA_ULTRA */

#define IRDA_MAX_HEADER (TTP_MAX_HEADER)

/*
 * Function irda_data_indication (instance, sap, skb)
 *
 *    Received some data from TinyTP. Just queue it on the receive queue
 *
 */
static int irda_data_indication(void *instance, void *sap, struct sk_buff *skb)
{
	struct irda_sock *self;
	struct sock *sk;
	int err;

	self = instance;
	sk = instance;

	err = sock_queue_rcv_skb(sk, skb);
	if (err) {
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		pr_debug("%s(), error: no more mem!\n", __func__);
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		self->rx_flow = FLOW_STOP;

		/* When we return error, TTP will need to requeue the skb */
		return err;
	}

	return 0;
}

/*
 * Function irda_disconnect_indication (instance, sap, reason, skb)
 *
 *    Connection has been closed. Check reason to find out why
 *
 */
static void irda_disconnect_indication(void *instance, void *sap,
				       LM_REASON reason, struct sk_buff *skb)
{
	struct irda_sock *self;
	struct sock *sk;

	self = instance;

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	pr_debug("%s(%p)\n", __func__, self);
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	/* Don't care about it, but let's not leak it */
	if(skb)
		dev_kfree_skb(skb);

	sk = instance;
	if (sk == NULL) {
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		pr_debug("%s(%p) : BUG : sk is NULL\n",
			 __func__, self);
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		return;
	}

	/* Prevent race conditions with irda_release() and irda_shutdown() */
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	bh_lock_sock(sk);
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	if (!sock_flag(sk, SOCK_DEAD) && sk->sk_state != TCP_CLOSE) {
		sk->sk_state     = TCP_CLOSE;
		sk->sk_shutdown |= SEND_SHUTDOWN;

		sk->sk_state_change(sk);

		/* Close our TSAP.
		 * If we leave it open, IrLMP put it back into the list of
		 * unconnected LSAPs. The problem is that any incoming request
		 * can then be matched to this socket (and it will be, because
		 * it is at the head of the list). This would prevent any
		 * listening socket waiting on the same TSAP to get those
		 * requests. Some apps forget to close sockets, or hang to it
		 * a bit too long, so we may stay in this dead state long
		 * enough to be noticed...
		 * Note : all socket function do check sk->sk_state, so we are
		 * safe...
		 * Jean II
		 */
		if (self->tsap) {
			irttp_close_tsap(self->tsap);
			self->tsap = NULL;
		}
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	}
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	bh_unlock_sock(sk);
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	/* Note : once we are there, there is not much you want to do
	 * with the socket anymore, apart from closing it.
	 * For example, bind() and connect() won't reset sk->sk_err,
	 * sk->sk_shutdown and sk->sk_flags to valid values...
	 * Jean II
	 */
}

/*
 * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb)
 *
 *    Connections has been confirmed by the remote device
 *
 */
static void irda_connect_confirm(void *instance, void *sap,
				 struct qos_info *qos,
				 __u32 max_sdu_size, __u8 max_header_size,
				 struct sk_buff *skb)
{
	struct irda_sock *self;
	struct sock *sk;

	self = instance;

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	pr_debug("%s(%p)\n", __func__, self);
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	sk = instance;
	if (sk == NULL) {
		dev_kfree_skb(skb);
		return;
	}

	dev_kfree_skb(skb);
	// Should be ??? skb_queue_tail(&sk->sk_receive_queue, skb);

	/* How much header space do we need to reserve */
	self->max_header_size = max_header_size;

	/* IrTTP max SDU size in transmit direction */
	self->max_sdu_size_tx = max_sdu_size;

	/* Find out what the largest chunk of data that we can transmit is */
	switch (sk->sk_type) {
	case SOCK_STREAM:
		if (max_sdu_size != 0) {
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			net_err_ratelimited("%s: max_sdu_size must be 0\n",
					    __func__);
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			return;
		}
		self->max_data_size = irttp_get_max_seg_size(self->tsap);
		break;
	case SOCK_SEQPACKET:
		if (max_sdu_size == 0) {
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			net_err_ratelimited("%s: max_sdu_size cannot be 0\n",
					    __func__);
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			return;
		}
		self->max_data_size = max_sdu_size;
		break;
	default:
		self->max_data_size = irttp_get_max_seg_size(self->tsap);
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	}
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	pr_debug("%s(), max_data_size=%d\n", __func__,
		 self->max_data_size);
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	memcpy(&self->qos_tx, qos, sizeof(struct qos_info));

	/* We are now connected! */
	sk->sk_state = TCP_ESTABLISHED;
	sk->sk_state_change(sk);
}

/*
 * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata)
 *
 *    Incoming connection
 *
 */
static void irda_connect_indication(void *instance, void *sap,
				    struct qos_info *qos, __u32 max_sdu_size,
				    __u8 max_header_size, struct sk_buff *skb)
{
	struct irda_sock *self;
	struct sock *sk;

	self = instance;

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	pr_debug("%s(%p)\n", __func__, self);
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	sk = instance;
	if (sk == NULL) {
		dev_kfree_skb(skb);
		return;
	}

	/* How much header space do we need to reserve */
	self->max_header_size = max_header_size;

	/* IrTTP max SDU size in transmit direction */
	self->max_sdu_size_tx = max_sdu_size;

	/* Find out what the largest chunk of data that we can transmit is */
	switch (sk->sk_type) {
	case SOCK_STREAM:
		if (max_sdu_size != 0) {
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			net_err_ratelimited("%s: max_sdu_size must be 0\n",
					    __func__);
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			kfree_skb(skb);
			return;
		}
		self->max_data_size = irttp_get_max_seg_size(self->tsap);
		break;
	case SOCK_SEQPACKET:
		if (max_sdu_size == 0) {
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			net_err_ratelimited("%s: max_sdu_size cannot be 0\n",
					    __func__);
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			kfree_skb(skb);
			return;
		}
		self->max_data_size = max_sdu_size;
		break;
	default:
		self->max_data_size = irttp_get_max_seg_size(self->tsap);
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	}
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	pr_debug("%s(), max_data_size=%d\n", __func__,
		 self->max_data_size);
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	memcpy(&self->qos_tx, qos, sizeof(struct qos_info));

	skb_queue_tail(&sk->sk_receive_queue, skb);
	sk->sk_state_change(sk);
}

/*
 * Function irda_connect_response (handle)
 *
 *    Accept incoming connection
 *
 */
static void irda_connect_response(struct irda_sock *self)
{
	struct sk_buff *skb;

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	skb = alloc_skb(TTP_MAX_HEADER + TTP_SAR_HEADER, GFP_KERNEL);
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	if (skb == NULL) {
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		pr_debug("%s() Unable to allocate sk_buff!\n",
			 __func__);
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		return;
	}

	/* Reserve space for MUX_CONTROL and LAP header */
	skb_reserve(skb, IRDA_MAX_HEADER);

	irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
}

/*
 * Function irda_flow_indication (instance, sap, flow)
 *
 *    Used by TinyTP to tell us if it can accept more data or not
 *
 */
static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
{
	struct irda_sock *self;
	struct sock *sk;

	self = instance;
	sk = instance;
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	BUG_ON(sk == NULL);
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	switch (flow) {
	case FLOW_STOP:
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		pr_debug("%s(), IrTTP wants us to slow down\n",
			 __func__);
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		self->tx_flow = flow;
		break;
	case FLOW_START:
		self->tx_flow = flow;
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		pr_debug("%s(), IrTTP wants us to start again\n",
			 __func__);
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		wake_up_interruptible(sk_sleep(sk));
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		break;
	default:
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		pr_debug("%s(), Unknown flow command!\n", __func__);
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		/* Unknown flow command, better stop */
		self->tx_flow = flow;
		break;
	}
}

/*
 * Function irda_getvalue_confirm (obj_id, value, priv)
 *
 *    Got answer from remote LM-IAS, just pass object to requester...
 *
 * Note : duplicate from above, but we need our own version that
 * doesn't touch the dtsap_sel and save the full value structure...
 */
static void irda_getvalue_confirm(int result, __u16 obj_id,
				  struct ias_value *value, void *priv)
{
	struct irda_sock *self;

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	self = priv;
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	if (!self) {
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		net_warn_ratelimited("%s: lost myself!\n", __func__);
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		return;
	}

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	pr_debug("%s(%p)\n", __func__, self);
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	/* We probably don't need to make any more queries */
	iriap_close(self->iriap);
	self->iriap = NULL;

	/* Check if request succeeded */
	if (result != IAS_SUCCESS) {
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		pr_debug("%s(), IAS query failed! (%d)\n", __func__,
			 result);
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		self->errno = result;	/* We really need it later */

		/* Wake up any processes waiting for result */
		wake_up_interruptible(&self->query_wait);

		return;
	}

	/* Pass the object to the caller (so the caller must delete it) */
	self->ias_result = value;
	self->errno = 0;

	/* Wake up any processes waiting for result */
	wake_up_interruptible(&self->query_wait);
}

/*
 * Function irda_selective_discovery_indication (discovery)
 *
 *    Got a selective discovery indication from IrLMP.
 *
 * IrLMP is telling us that this node is new and matching our hint bit
 * filter. Wake up any process waiting for answer...
 */
static void irda_selective_discovery_indication(discinfo_t *discovery,
						DISCOVERY_MODE mode,
						void *priv)
{
	struct irda_sock *self;

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	self = priv;
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	if (!self) {
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		net_warn_ratelimited("%s: lost myself!\n", __func__);
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		return;
	}

	/* Pass parameter to the caller */
	self->cachedaddr = discovery->daddr;

	/* Wake up process if its waiting for device to be discovered */
	wake_up_interruptible(&self->query_wait);
}

/*
 * Function irda_discovery_timeout (priv)
 *
 *    Timeout in the selective discovery process
 *
 * We were waiting for a node to be discovered, but nothing has come up
 * so far. Wake up the user and tell him that we failed...
 */
static void irda_discovery_timeout(u_long priv)
{
	struct irda_sock *self;

	self = (struct irda_sock *) priv;
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	BUG_ON(self == NULL);
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	/* Nothing for the caller */
	self->cachelog = NULL;
	self->cachedaddr = 0;
	self->errno = -ETIME;

	/* Wake up process if its still waiting... */
	wake_up_interruptible(&self->query_wait);
}

/*
 * Function irda_open_tsap (self)
 *
 *    Open local Transport Service Access Point (TSAP)
 *
 */
static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
{
	notify_t notify;

	if (self->tsap) {
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		pr_debug("%s: busy!\n", __func__);
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		return -EBUSY;
	}

	/* Initialize callbacks to be used by the IrDA stack */
	irda_notify_init(&notify);
	notify.connect_confirm       = irda_connect_confirm;
	notify.connect_indication    = irda_connect_indication;
	notify.disconnect_indication = irda_disconnect_indication;
	notify.data_indication       = irda_data_indication;
	notify.udata_indication	     = irda_data_indication;
	notify.flow_indication       = irda_flow_indication;
	notify.instance = self;
	strncpy(notify.name, name, NOTIFY_MAX_NAME);

	self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
				     &notify);
	if (self->tsap == NULL) {
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		pr_debug("%s(), Unable to allocate TSAP!\n",
			 __func__);
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		return -ENOMEM;
	}
	/* Remember which TSAP selector we actually got */
	self->stsap_sel = self->tsap->stsap_sel;

	return 0;
}

/*
 * Function irda_open_lsap (self)
 *
 *    Open local Link Service Access Point (LSAP). Used for opening Ultra
 *    sockets
 */
#ifdef CONFIG_IRDA_ULTRA
static int irda_open_lsap(struct irda_sock *self, int pid)
{
	notify_t notify;

	if (self->lsap) {
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		net_warn_ratelimited("%s(), busy!\n", __func__);
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		return -EBUSY;
	}

	/* Initialize callbacks to be used by the IrDA stack */
	irda_notify_init(&notify);
	notify.udata_indication	= irda_data_indication;
	notify.instance = self;
	strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);

	self->lsap = irlmp_open_lsap(LSAP_CONNLESS, &notify, pid);
	if (self->lsap == NULL) {
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		pr_debug("%s(), Unable to allocate LSAP!\n", __func__);
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		return -ENOMEM;
	}

	return 0;
}
#endif /* CONFIG_IRDA_ULTRA */

/*
 * Function irda_find_lsap_sel (self, name)
 *
 *    Try to lookup LSAP selector in remote LM-IAS
 *
 * Basically, we start a IAP query, and then go to sleep. When the query
 * return, irda_getvalue_confirm will wake us up, and we can examine the
 * result of the query...
 * Note that in some case, the query fail even before we go to sleep,
 * creating some races...
 */
static int irda_find_lsap_sel(struct irda_sock *self, char *name)
{
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	pr_debug("%s(%p, %s)\n", __func__, self, name);
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	if (self->iriap) {
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		net_warn_ratelimited("%s(): busy with a previous query\n",
				     __func__);
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		return -EBUSY;
	}

	self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
				 irda_getvalue_confirm);
	if(self->iriap == NULL)
		return -ENOMEM;

	/* Treat unexpected wakeup as disconnect */
	self->errno = -EHOSTUNREACH;

	/* Query remote LM-IAS */
	iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
				      name, "IrDA:TinyTP:LsapSel");

	/* Wait for answer, if not yet finished (or failed) */
	if (wait_event_interruptible(self->query_wait, (self->iriap==NULL)))
		/* Treat signals as disconnect */
		return -EHOSTUNREACH;

	/* Check what happened */
	if (self->errno)
	{
		/* Requested object/attribute doesn't exist */
		if((self->errno == IAS_CLASS_UNKNOWN) ||
		   (self->errno == IAS_ATTRIB_UNKNOWN))
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			return -EADDRNOTAVAIL;
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		else
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			return -EHOSTUNREACH;
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	}

	/* Get the remote TSAP selector */
	switch (self->ias_result->type) {
	case IAS_INTEGER:
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		pr_debug("%s() int=%d\n",
			 __func__, self->ias_result->t.integer);
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		if (self->ias_result->t.integer != -1)
			self->dtsap_sel = self->ias_result->t.integer;
		else
			self->dtsap_sel = 0;
		break;
	default:
		self->dtsap_sel = 0;
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		pr_debug("%s(), bad type!\n", __func__);
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		break;
	}
	if (self->ias_result)
		irias_delete_value(self->ias_result);

	if (self->dtsap_sel)
		return 0;

	return -EADDRNOTAVAIL;
}

/*
 * Function irda_discover_daddr_and_lsap_sel (self, name)
 *
 *    This try to find a device with the requested service.
 *
 * It basically look into the discovery log. For each address in the list,
 * it queries the LM-IAS of the device to find if this device offer
 * the requested service.
 * If there is more than one node supporting the service, we complain
 * to the user (it should move devices around).
 * The, we set both the destination address and the lsap selector to point
 * on the service on the unique device we have found.
 *
 * Note : this function fails if there is more than one device in range,
 * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
 * Moreover, we would need to wait the LAP disconnection...
 */
static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
{
	discinfo_t *discoveries;	/* Copy of the discovery log */
	int	number;			/* Number of nodes in the log */
	int	i;
	int	err = -ENETUNREACH;
	__u32	daddr = DEV_ADDR_ANY;	/* Address we found the service on */
	__u8	dtsap_sel = 0x0;	/* TSAP associated with it */

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	pr_debug("%s(), name=%s\n", __func__, name);
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	/* Ask lmp for the current discovery log
	 * Note : we have to use irlmp_get_discoveries(), as opposed
	 * to play with the cachelog directly, because while we are
	 * making our ias query, le log might change... */
	discoveries = irlmp_get_discoveries(&number, self->mask.word,
					    self->nslots);
	/* Check if the we got some results */
	if (discoveries == NULL)
		return -ENETUNREACH;	/* No nodes discovered */

	/*
	 * Now, check all discovered devices (if any), and connect
	 * client only about the services that the client is
	 * interested in...
	 */
	for(i = 0; i < number; i++) {
		/* Try the address in the log */
		self->daddr = discoveries[i].daddr;
		self->saddr = 0x0;
639 640
		pr_debug("%s(), trying daddr = %08x\n",
			 __func__, self->daddr);
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		/* Query remote LM-IAS for this service */
		err = irda_find_lsap_sel(self, name);
		switch (err) {
		case 0:
			/* We found the requested service */
			if(daddr != DEV_ADDR_ANY) {
648 649
				pr_debug("%s(), discovered service ''%s'' in two different devices !!!\n",
					 __func__, name);
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650 651
				self->daddr = DEV_ADDR_ANY;
				kfree(discoveries);
652
				return -ENOTUNIQ;
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			}
			/* First time we found that one, save it ! */
			daddr = self->daddr;
			dtsap_sel = self->dtsap_sel;
			break;
		case -EADDRNOTAVAIL:
			/* Requested service simply doesn't exist on this node */
			break;
		default:
			/* Something bad did happen :-( */
663 664
			pr_debug("%s(), unexpected IAS query failure\n",
				 __func__);
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			self->daddr = DEV_ADDR_ANY;
			kfree(discoveries);
667
			return -EHOSTUNREACH;
L
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		}
	}
	/* Cleanup our copy of the discovery log */
	kfree(discoveries);

	/* Check out what we found */
	if(daddr == DEV_ADDR_ANY) {
675 676
		pr_debug("%s(), cannot discover service ''%s'' in any device !!!\n",
			 __func__, name);
L
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677
		self->daddr = DEV_ADDR_ANY;
678
		return -EADDRNOTAVAIL;
L
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	}

	/* Revert back to discovered device & service */
	self->daddr = daddr;
	self->saddr = 0x0;
	self->dtsap_sel = dtsap_sel;

686 687
	pr_debug("%s(), discovered requested service ''%s'' at address %08x\n",
		 __func__, name, self->daddr);
L
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	return 0;
}

/*
 * Function irda_getname (sock, uaddr, uaddr_len, peer)
 *
 *    Return the our own, or peers socket address (sockaddr_irda)
 *
 */
static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
			int *uaddr_len, int peer)
{
	struct sockaddr_irda saddr;
	struct sock *sk = sock->sk;
	struct irda_sock *self = irda_sk(sk);

705
	memset(&saddr, 0, sizeof(saddr));
L
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	if (peer) {
		if (sk->sk_state != TCP_ESTABLISHED)
708
			return -ENOTCONN;
L
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		saddr.sir_family = AF_IRDA;
		saddr.sir_lsap_sel = self->dtsap_sel;
		saddr.sir_addr = self->daddr;
	} else {
		saddr.sir_family = AF_IRDA;
		saddr.sir_lsap_sel = self->stsap_sel;
		saddr.sir_addr = self->saddr;
	}

719 720
	pr_debug("%s(), tsap_sel = %#x\n", __func__, saddr.sir_lsap_sel);
	pr_debug("%s(), addr = %08x\n", __func__, saddr.sir_addr);
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	/* uaddr_len come to us uninitialised */
	*uaddr_len = sizeof (struct sockaddr_irda);
	memcpy(uaddr, &saddr, *uaddr_len);
725 726

	return 0;
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}

/*
 * Function irda_listen (sock, backlog)
 *
 *    Just move to the listen state
 *
 */
static int irda_listen(struct socket *sock, int backlog)
{
	struct sock *sk = sock->sk;
738
	int err = -EOPNOTSUPP;
L
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739

740 741
	lock_sock(sk);

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	if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
	    (sk->sk_type != SOCK_DGRAM))
744
		goto out;
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	if (sk->sk_state != TCP_LISTEN) {
		sk->sk_max_ack_backlog = backlog;
		sk->sk_state           = TCP_LISTEN;

750
		err = 0;
L
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	}
752
out:
753
	release_sock(sk);
L
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754

755
	return err;
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}

/*
 * Function irda_bind (sock, uaddr, addr_len)
 *
 *    Used by servers to register their well known TSAP
 *
 */
static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
{
	struct sock *sk = sock->sk;
	struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
	struct irda_sock *self = irda_sk(sk);
	int err;

771
	pr_debug("%s(%p)\n", __func__, self);
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	if (addr_len != sizeof(struct sockaddr_irda))
		return -EINVAL;

776
	lock_sock(sk);
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#ifdef CONFIG_IRDA_ULTRA
	/* Special care for Ultra sockets */
	if ((sk->sk_type == SOCK_DGRAM) &&
	    (sk->sk_protocol == IRDAPROTO_ULTRA)) {
		self->pid = addr->sir_lsap_sel;
782
		err = -EOPNOTSUPP;
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783
		if (self->pid & 0x80) {
784 785
			pr_debug("%s(), extension in PID not supp!\n",
				 __func__);
786
			goto out;
L
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		}
		err = irda_open_lsap(self, self->pid);
		if (err < 0)
790
			goto out;
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		/* Pretend we are connected */
		sock->state = SS_CONNECTED;
		sk->sk_state   = TCP_ESTABLISHED;
795
		err = 0;
L
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797
		goto out;
L
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	}
#endif /* CONFIG_IRDA_ULTRA */

801
	self->ias_obj = irias_new_object(addr->sir_name, jiffies);
802
	err = -ENOMEM;
803
	if (self->ias_obj == NULL)
804
		goto out;
805

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806
	err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
807
	if (err < 0) {
808 809
		irias_delete_object(self->ias_obj);
		self->ias_obj = NULL;
810
		goto out;
811
	}
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812 813 814 815 816 817

	/*  Register with LM-IAS */
	irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel",
				 self->stsap_sel, IAS_KERNEL_ATTR);
	irias_insert_object(self->ias_obj);

818 819
	err = 0;
out:
820
	release_sock(sk);
821
	return err;
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}

/*
 * Function irda_accept (sock, newsock, flags)
 *
 *    Wait for incoming connection
 *
 */
static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
{
	struct sock *sk = sock->sk;
	struct irda_sock *new, *self = irda_sk(sk);
	struct sock *newsk;
835
	struct sk_buff *skb = NULL;
L
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836 837
	int err;

838
	err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
L
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839
	if (err)
840
		return err;
L
Linus Torvalds 已提交
841

842
	err = -EINVAL;
843 844

	lock_sock(sk);
L
Linus Torvalds 已提交
845
	if (sock->state != SS_UNCONNECTED)
846
		goto out;
L
Linus Torvalds 已提交
847

848
	err = -EOPNOTSUPP;
L
Linus Torvalds 已提交
849 850
	if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
	    (sk->sk_type != SOCK_DGRAM))
851
		goto out;
L
Linus Torvalds 已提交
852

853
	err = -EINVAL;
L
Linus Torvalds 已提交
854
	if (sk->sk_state != TCP_LISTEN)
855
		goto out;
L
Linus Torvalds 已提交
856 857 858 859 860 861 862 863 864 865 866 867 868 869

	/*
	 *	The read queue this time is holding sockets ready to use
	 *	hooked into the SABM we saved
	 */

	/*
	 * We can perform the accept only if there is incoming data
	 * on the listening socket.
	 * So, we will block the caller until we receive any data.
	 * If the caller was waiting on select() or poll() before
	 * calling us, the data is waiting for us ;-)
	 * Jean II
	 */
870 871 872 873
	while (1) {
		skb = skb_dequeue(&sk->sk_receive_queue);
		if (skb)
			break;
L
Linus Torvalds 已提交
874 875

		/* Non blocking operation */
876
		err = -EWOULDBLOCK;
L
Linus Torvalds 已提交
877
		if (flags & O_NONBLOCK)
878
			goto out;
L
Linus Torvalds 已提交
879

E
Eric Dumazet 已提交
880
		err = wait_event_interruptible(*(sk_sleep(sk)),
881 882
					skb_peek(&sk->sk_receive_queue));
		if (err)
883
			goto out;
L
Linus Torvalds 已提交
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	}

	newsk = newsock->sk;
887
	err = -EIO;
888
	if (newsk == NULL)
889
		goto out;
890

L
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891 892 893 894 895 896
	newsk->sk_state = TCP_ESTABLISHED;

	new = irda_sk(newsk);

	/* Now attach up the new socket */
	new->tsap = irttp_dup(self->tsap, new);
897
	err = -EPERM; /* value does not seem to make sense. -arnd */
L
Linus Torvalds 已提交
898
	if (!new->tsap) {
899
		pr_debug("%s(), dup failed!\n", __func__);
900
		goto out;
L
Linus Torvalds 已提交
901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922
	}

	new->stsap_sel = new->tsap->stsap_sel;
	new->dtsap_sel = new->tsap->dtsap_sel;
	new->saddr = irttp_get_saddr(new->tsap);
	new->daddr = irttp_get_daddr(new->tsap);

	new->max_sdu_size_tx = self->max_sdu_size_tx;
	new->max_sdu_size_rx = self->max_sdu_size_rx;
	new->max_data_size   = self->max_data_size;
	new->max_header_size = self->max_header_size;

	memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));

	/* Clean up the original one to keep it in listen state */
	irttp_listen(self->tsap);

	sk->sk_ack_backlog--;

	newsock->state = SS_CONNECTED;

	irda_connect_response(new);
923 924
	err = 0;
out:
925
	kfree_skb(skb);
926
	release_sock(sk);
927
	return err;
L
Linus Torvalds 已提交
928 929 930 931 932 933 934 935 936 937
}

/*
 * Function irda_connect (sock, uaddr, addr_len, flags)
 *
 *    Connect to a IrDA device
 *
 * The main difference with a "standard" connect is that with IrDA we need
 * to resolve the service name into a TSAP selector (in TCP, port number
 * doesn't have to be resolved).
M
Masanari Iida 已提交
938
 * Because of this service name resolution, we can offer "auto-connect",
L
Linus Torvalds 已提交
939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957
 * where we connect to a service without specifying a destination address.
 *
 * Note : by consulting "errno", the user space caller may learn the cause
 * of the failure. Most of them are visible in the function, others may come
 * from subroutines called and are listed here :
 *	o EBUSY : already processing a connect
 *	o EHOSTUNREACH : bad addr->sir_addr argument
 *	o EADDRNOTAVAIL : bad addr->sir_name argument
 *	o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
 *	o ENETUNREACH : no node found on the network (auto-connect)
 */
static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
			int addr_len, int flags)
{
	struct sock *sk = sock->sk;
	struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
	struct irda_sock *self = irda_sk(sk);
	int err;

958
	pr_debug("%s(%p)\n", __func__, self);
L
Linus Torvalds 已提交
959

960
	lock_sock(sk);
L
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961
	/* Don't allow connect for Ultra sockets */
962
	err = -ESOCKTNOSUPPORT;
L
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963
	if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
964
		goto out;
L
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965 966 967

	if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
		sock->state = SS_CONNECTED;
968 969
		err = 0;
		goto out;   /* Connect completed during a ERESTARTSYS event */
L
Linus Torvalds 已提交
970 971 972 973
	}

	if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
		sock->state = SS_UNCONNECTED;
974 975
		err = -ECONNREFUSED;
		goto out;
L
Linus Torvalds 已提交
976 977
	}

978
	err = -EISCONN;      /* No reconnect on a seqpacket socket */
L
Linus Torvalds 已提交
979
	if (sk->sk_state == TCP_ESTABLISHED)
980
		goto out;
L
Linus Torvalds 已提交
981 982 983 984

	sk->sk_state   = TCP_CLOSE;
	sock->state = SS_UNCONNECTED;

985
	err = -EINVAL;
L
Linus Torvalds 已提交
986
	if (addr_len != sizeof(struct sockaddr_irda))
987
		goto out;
L
Linus Torvalds 已提交
988 989 990 991 992 993

	/* Check if user supplied any destination device address */
	if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
		/* Try to find one suitable */
		err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
		if (err) {
994
			pr_debug("%s(), auto-connect failed!\n", __func__);
995
			goto out;
L
Linus Torvalds 已提交
996 997 998 999
		}
	} else {
		/* Use the one provided by the user */
		self->daddr = addr->sir_addr;
1000
		pr_debug("%s(), daddr = %08x\n", __func__, self->daddr);
L
Linus Torvalds 已提交
1001 1002 1003 1004 1005 1006 1007 1008 1009

		/* If we don't have a valid service name, we assume the
		 * user want to connect on a specific LSAP. Prevent
		 * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
		if((addr->sir_name[0] != '\0') ||
		   (addr->sir_lsap_sel >= 0x70)) {
			/* Query remote LM-IAS using service name */
			err = irda_find_lsap_sel(self, addr->sir_name);
			if (err) {
1010
				pr_debug("%s(), connect failed!\n", __func__);
1011
				goto out;
L
Linus Torvalds 已提交
1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022
			}
		} else {
			/* Directly connect to the remote LSAP
			 * specified by the sir_lsap field.
			 * Please use with caution, in IrDA LSAPs are
			 * dynamic and there is no "well-known" LSAP. */
			self->dtsap_sel = addr->sir_lsap_sel;
		}
	}

	/* Check if we have opened a local TSAP */
1023 1024 1025 1026 1027
	if (!self->tsap) {
		err = irda_open_tsap(self, LSAP_ANY, addr->sir_name);
		if (err)
			goto out;
	}
L
Linus Torvalds 已提交
1028 1029 1030 1031 1032 1033 1034 1035 1036 1037

	/* Move to connecting socket, start sending Connect Requests */
	sock->state = SS_CONNECTING;
	sk->sk_state   = TCP_SYN_SENT;

	/* Connect to remote device */
	err = irttp_connect_request(self->tsap, self->dtsap_sel,
				    self->saddr, self->daddr, NULL,
				    self->max_sdu_size_rx, NULL);
	if (err) {
1038
		pr_debug("%s(), connect failed!\n", __func__);
1039
		goto out;
L
Linus Torvalds 已提交
1040 1041 1042
	}

	/* Now the loop */
1043
	err = -EINPROGRESS;
L
Linus Torvalds 已提交
1044
	if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1045
		goto out;
L
Linus Torvalds 已提交
1046

1047
	err = -ERESTARTSYS;
E
Eric Dumazet 已提交
1048
	if (wait_event_interruptible(*(sk_sleep(sk)),
L
Linus Torvalds 已提交
1049
				     (sk->sk_state != TCP_SYN_SENT)))
1050
		goto out;
L
Linus Torvalds 已提交
1051 1052 1053

	if (sk->sk_state != TCP_ESTABLISHED) {
		sock->state = SS_UNCONNECTED;
1054
		err = sock_error(sk);
1055 1056 1057
		if (!err)
			err = -ECONNRESET;
		goto out;
L
Linus Torvalds 已提交
1058 1059 1060 1061 1062 1063
	}

	sock->state = SS_CONNECTED;

	/* At this point, IrLMP has assigned our source address */
	self->saddr = irttp_get_saddr(self->tsap);
1064 1065
	err = 0;
out:
1066
	release_sock(sk);
1067
	return err;
L
Linus Torvalds 已提交
1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081
}

static struct proto irda_proto = {
	.name	  = "IRDA",
	.owner	  = THIS_MODULE,
	.obj_size = sizeof(struct irda_sock),
};

/*
 * Function irda_create (sock, protocol)
 *
 *    Create IrDA socket
 *
 */
1082 1083
static int irda_create(struct net *net, struct socket *sock, int protocol,
		       int kern)
L
Linus Torvalds 已提交
1084 1085 1086 1087
{
	struct sock *sk;
	struct irda_sock *self;

1088 1089 1090
	if (protocol < 0 || protocol > SK_PROTOCOL_MAX)
		return -EINVAL;

1091 1092 1093
	if (net != &init_net)
		return -EAFNOSUPPORT;

L
Linus Torvalds 已提交
1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104
	/* Check for valid socket type */
	switch (sock->type) {
	case SOCK_STREAM:     /* For TTP connections with SAR disabled */
	case SOCK_SEQPACKET:  /* For TTP connections with SAR enabled */
	case SOCK_DGRAM:      /* For TTP Unitdata or LMP Ultra transfers */
		break;
	default:
		return -ESOCKTNOSUPPORT;
	}

	/* Allocate networking socket */
1105
	sk = sk_alloc(net, PF_IRDA, GFP_KERNEL, &irda_proto, kern);
L
Linus Torvalds 已提交
1106 1107 1108 1109
	if (sk == NULL)
		return -ENOMEM;

	self = irda_sk(sk);
1110
	pr_debug("%s() : self is %p\n", __func__, self);
L
Linus Torvalds 已提交
1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139

	init_waitqueue_head(&self->query_wait);

	switch (sock->type) {
	case SOCK_STREAM:
		sock->ops = &irda_stream_ops;
		self->max_sdu_size_rx = TTP_SAR_DISABLE;
		break;
	case SOCK_SEQPACKET:
		sock->ops = &irda_seqpacket_ops;
		self->max_sdu_size_rx = TTP_SAR_UNBOUND;
		break;
	case SOCK_DGRAM:
		switch (protocol) {
#ifdef CONFIG_IRDA_ULTRA
		case IRDAPROTO_ULTRA:
			sock->ops = &irda_ultra_ops;
			/* Initialise now, because we may send on unbound
			 * sockets. Jean II */
			self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
			self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
			break;
#endif /* CONFIG_IRDA_ULTRA */
		case IRDAPROTO_UNITDATA:
			sock->ops = &irda_dgram_ops;
			/* We let Unitdata conn. be like seqpack conn. */
			self->max_sdu_size_rx = TTP_SAR_UNBOUND;
			break;
		default:
1140
			sk_free(sk);
L
Linus Torvalds 已提交
1141 1142 1143 1144
			return -ESOCKTNOSUPPORT;
		}
		break;
	default:
1145
		sk_free(sk);
L
Linus Torvalds 已提交
1146 1147 1148
		return -ESOCKTNOSUPPORT;
	}

1149 1150 1151 1152 1153
	/* Initialise networking socket struct */
	sock_init_data(sock, sk);	/* Note : set sk->sk_refcnt to 1 */
	sk->sk_family = PF_IRDA;
	sk->sk_protocol = protocol;

L
Linus Torvalds 已提交
1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171
	/* Register as a client with IrLMP */
	self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
	self->mask.word = 0xffff;
	self->rx_flow = self->tx_flow = FLOW_START;
	self->nslots = DISCOVERY_DEFAULT_SLOTS;
	self->daddr = DEV_ADDR_ANY;	/* Until we get connected */
	self->saddr = 0x0;		/* so IrLMP assign us any link */
	return 0;
}

/*
 * Function irda_destroy_socket (self)
 *
 *    Destroy socket
 *
 */
static void irda_destroy_socket(struct irda_sock *self)
{
1172
	pr_debug("%s(%p)\n", __func__, self);
L
Linus Torvalds 已提交
1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208

	/* Unregister with IrLMP */
	irlmp_unregister_client(self->ckey);
	irlmp_unregister_service(self->skey);

	/* Unregister with LM-IAS */
	if (self->ias_obj) {
		irias_delete_object(self->ias_obj);
		self->ias_obj = NULL;
	}

	if (self->iriap) {
		iriap_close(self->iriap);
		self->iriap = NULL;
	}

	if (self->tsap) {
		irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
		irttp_close_tsap(self->tsap);
		self->tsap = NULL;
	}
#ifdef CONFIG_IRDA_ULTRA
	if (self->lsap) {
		irlmp_close_lsap(self->lsap);
		self->lsap = NULL;
	}
#endif /* CONFIG_IRDA_ULTRA */
}

/*
 * Function irda_release (sock)
 */
static int irda_release(struct socket *sock)
{
	struct sock *sk = sock->sk;

1209
	if (sk == NULL)
L
Linus Torvalds 已提交
1210 1211
		return 0;

S
Samuel Ortiz 已提交
1212
	lock_sock(sk);
L
Linus Torvalds 已提交
1213 1214 1215 1216 1217 1218 1219 1220 1221
	sk->sk_state       = TCP_CLOSE;
	sk->sk_shutdown   |= SEND_SHUTDOWN;
	sk->sk_state_change(sk);

	/* Destroy IrDA socket */
	irda_destroy_socket(irda_sk(sk));

	sock_orphan(sk);
	sock->sk   = NULL;
S
Samuel Ortiz 已提交
1222
	release_sock(sk);
L
Linus Torvalds 已提交
1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256

	/* Purge queues (see sock_init_data()) */
	skb_queue_purge(&sk->sk_receive_queue);

	/* Destroy networking socket if we are the last reference on it,
	 * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
	sock_put(sk);

	/* Notes on socket locking and deallocation... - Jean II
	 * In theory we should put pairs of sock_hold() / sock_put() to
	 * prevent the socket to be destroyed whenever there is an
	 * outstanding request or outstanding incoming packet or event.
	 *
	 * 1) This may include IAS request, both in connect and getsockopt.
	 * Unfortunately, the situation is a bit more messy than it looks,
	 * because we close iriap and kfree(self) above.
	 *
	 * 2) This may include selective discovery in getsockopt.
	 * Same stuff as above, irlmp registration and self are gone.
	 *
	 * Probably 1 and 2 may not matter, because it's all triggered
	 * by a process and the socket layer already prevent the
	 * socket to go away while a process is holding it, through
	 * sockfd_put() and fput()...
	 *
	 * 3) This may include deferred TSAP closure. In particular,
	 * we may receive a late irda_disconnect_indication()
	 * Fortunately, (tsap_cb *)->close_pend should protect us
	 * from that.
	 *
	 * I did some testing on SMP, and it looks solid. And the socket
	 * memory leak is now gone... - Jean II
	 */

1257
	return 0;
L
Linus Torvalds 已提交
1258 1259 1260
}

/*
1261
 * Function irda_sendmsg (sock, msg, len)
L
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1262 1263 1264 1265 1266
 *
 *    Send message down to TinyTP. This function is used for both STREAM and
 *    SEQPACK services. This is possible since it forces the client to
 *    fragment the message if necessary
 */
1267
static int irda_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
L
Linus Torvalds 已提交
1268 1269 1270 1271
{
	struct sock *sk = sock->sk;
	struct irda_sock *self;
	struct sk_buff *skb;
1272
	int err = -EPIPE;
L
Linus Torvalds 已提交
1273

1274
	pr_debug("%s(), len=%zd\n", __func__, len);
L
Linus Torvalds 已提交
1275 1276

	/* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1277
	if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
1278
			       MSG_NOSIGNAL)) {
1279
		return -EINVAL;
1280
	}
L
Linus Torvalds 已提交
1281

1282 1283
	lock_sock(sk);

1284 1285
	if (sk->sk_shutdown & SEND_SHUTDOWN)
		goto out_err;
L
Linus Torvalds 已提交
1286

1287 1288 1289 1290
	if (sk->sk_state != TCP_ESTABLISHED) {
		err = -ENOTCONN;
		goto out;
	}
L
Linus Torvalds 已提交
1291 1292 1293 1294 1295

	self = irda_sk(sk);

	/* Check if IrTTP is wants us to slow down */

E
Eric Dumazet 已提交
1296
	if (wait_event_interruptible(*(sk_sleep(sk)),
1297 1298 1299 1300
	    (self->tx_flow != FLOW_STOP  ||  sk->sk_state != TCP_ESTABLISHED))) {
		err = -ERESTARTSYS;
		goto out;
	}
L
Linus Torvalds 已提交
1301 1302

	/* Check if we are still connected */
1303 1304 1305 1306
	if (sk->sk_state != TCP_ESTABLISHED) {
		err = -ENOTCONN;
		goto out;
	}
L
Linus Torvalds 已提交
1307

A
Alexey Dobriyan 已提交
1308
	/* Check that we don't send out too big frames */
L
Linus Torvalds 已提交
1309
	if (len > self->max_data_size) {
1310 1311
		pr_debug("%s(), Chopping frame from %zd to %d bytes!\n",
			 __func__, len, self->max_data_size);
L
Linus Torvalds 已提交
1312 1313 1314
		len = self->max_data_size;
	}

1315
	skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
L
Linus Torvalds 已提交
1316 1317
				  msg->msg_flags & MSG_DONTWAIT, &err);
	if (!skb)
1318
		goto out_err;
L
Linus Torvalds 已提交
1319 1320

	skb_reserve(skb, self->max_header_size + 16);
1321 1322
	skb_reset_transport_header(skb);
	skb_put(skb, len);
A
Al Viro 已提交
1323
	err = memcpy_from_msg(skb_transport_header(skb), msg, len);
L
Linus Torvalds 已提交
1324 1325
	if (err) {
		kfree_skb(skb);
1326
		goto out_err;
L
Linus Torvalds 已提交
1327 1328 1329 1330 1331 1332 1333 1334
	}

	/*
	 * Just send the message to TinyTP, and let it deal with possible
	 * errors. No need to duplicate all that here
	 */
	err = irttp_data_request(self->tsap, skb);
	if (err) {
1335
		pr_debug("%s(), err=%d\n", __func__, err);
1336
		goto out_err;
L
Linus Torvalds 已提交
1337
	}
1338

1339
	release_sock(sk);
L
Linus Torvalds 已提交
1340 1341
	/* Tell client how much data we actually sent */
	return len;
1342

1343 1344 1345
out_err:
	err = sk_stream_error(sk, msg->msg_flags, err);
out:
1346
	release_sock(sk);
1347
	return err;
1348

L
Linus Torvalds 已提交
1349 1350 1351
}

/*
1352
 * Function irda_recvmsg_dgram (sock, msg, size, flags)
L
Linus Torvalds 已提交
1353 1354 1355 1356
 *
 *    Try to receive message and copy it to user. The frame is discarded
 *    after being read, regardless of how much the user actually read
 */
1357 1358
static int irda_recvmsg_dgram(struct socket *sock, struct msghdr *msg,
			      size_t size, int flags)
L
Linus Torvalds 已提交
1359 1360 1361 1362 1363 1364 1365 1366 1367 1368
{
	struct sock *sk = sock->sk;
	struct irda_sock *self = irda_sk(sk);
	struct sk_buff *skb;
	size_t copied;
	int err;

	skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
				flags & MSG_DONTWAIT, &err);
	if (!skb)
1369
		return err;
L
Linus Torvalds 已提交
1370

1371 1372
	skb_reset_transport_header(skb);
	copied = skb->len;
L
Linus Torvalds 已提交
1373 1374

	if (copied > size) {
1375 1376
		pr_debug("%s(), Received truncated frame (%zd < %zd)!\n",
			 __func__, copied, size);
L
Linus Torvalds 已提交
1377 1378 1379
		copied = size;
		msg->msg_flags |= MSG_TRUNC;
	}
1380
	skb_copy_datagram_msg(skb, 0, msg, copied);
L
Linus Torvalds 已提交
1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391

	skb_free_datagram(sk, skb);

	/*
	 *  Check if we have previously stopped IrTTP and we know
	 *  have more free space in our rx_queue. If so tell IrTTP
	 *  to start delivering frames again before our rx_queue gets
	 *  empty
	 */
	if (self->rx_flow == FLOW_STOP) {
		if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1392
			pr_debug("%s(), Starting IrTTP\n", __func__);
L
Linus Torvalds 已提交
1393 1394 1395 1396
			self->rx_flow = FLOW_START;
			irttp_flow_request(self->tsap, FLOW_START);
		}
	}
1397

1398
	return copied;
L
Linus Torvalds 已提交
1399 1400 1401
}

/*
1402
 * Function irda_recvmsg_stream (sock, msg, size, flags)
L
Linus Torvalds 已提交
1403
 */
1404 1405
static int irda_recvmsg_stream(struct socket *sock, struct msghdr *msg,
			       size_t size, int flags)
L
Linus Torvalds 已提交
1406 1407 1408 1409 1410
{
	struct sock *sk = sock->sk;
	struct irda_sock *self = irda_sk(sk);
	int noblock = flags & MSG_DONTWAIT;
	size_t copied = 0;
1411
	int target, err;
1412
	long timeo;
L
Linus Torvalds 已提交
1413

1414
	if ((err = sock_error(sk)) < 0)
1415
		return err;
L
Linus Torvalds 已提交
1416 1417

	if (sock->flags & __SO_ACCEPTCON)
1418
		return -EINVAL;
L
Linus Torvalds 已提交
1419

1420
	err =-EOPNOTSUPP;
L
Linus Torvalds 已提交
1421
	if (flags & MSG_OOB)
1422
		return -EOPNOTSUPP;
L
Linus Torvalds 已提交
1423

1424
	err = 0;
1425 1426
	target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
	timeo = sock_rcvtimeo(sk, noblock);
L
Linus Torvalds 已提交
1427 1428 1429 1430 1431

	do {
		int chunk;
		struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);

1432 1433
		if (skb == NULL) {
			DEFINE_WAIT(wait);
1434
			err = 0;
L
Linus Torvalds 已提交
1435 1436 1437 1438

			if (copied >= target)
				break;

E
Eric Dumazet 已提交
1439
			prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
L
Linus Torvalds 已提交
1440 1441 1442 1443

			/*
			 *	POSIX 1003.1g mandates this order.
			 */
1444 1445
			err = sock_error(sk);
			if (err)
1446
				;
L
Linus Torvalds 已提交
1447 1448 1449
			else if (sk->sk_shutdown & RCV_SHUTDOWN)
				;
			else if (noblock)
1450
				err = -EAGAIN;
L
Linus Torvalds 已提交
1451
			else if (signal_pending(current))
1452
				err = sock_intr_errno(timeo);
1453
			else if (sk->sk_state != TCP_ESTABLISHED)
1454
				err = -ENOTCONN;
L
Linus Torvalds 已提交
1455 1456 1457 1458
			else if (skb_peek(&sk->sk_receive_queue) == NULL)
				/* Wait process until data arrives */
				schedule();

E
Eric Dumazet 已提交
1459
			finish_wait(sk_sleep(sk), &wait);
L
Linus Torvalds 已提交
1460

1461
			if (err)
1462
				return err;
L
Linus Torvalds 已提交
1463 1464 1465 1466 1467 1468 1469
			if (sk->sk_shutdown & RCV_SHUTDOWN)
				break;

			continue;
		}

		chunk = min_t(unsigned int, skb->len, size);
A
Al Viro 已提交
1470
		if (memcpy_to_msg(msg, skb->data, chunk)) {
L
Linus Torvalds 已提交
1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484
			skb_queue_head(&sk->sk_receive_queue, skb);
			if (copied == 0)
				copied = -EFAULT;
			break;
		}
		copied += chunk;
		size -= chunk;

		/* Mark read part of skb as used */
		if (!(flags & MSG_PEEK)) {
			skb_pull(skb, chunk);

			/* put the skb back if we didn't use it up.. */
			if (skb->len) {
1485 1486
				pr_debug("%s(), back on q!\n",
					 __func__);
L
Linus Torvalds 已提交
1487 1488 1489 1490 1491 1492
				skb_queue_head(&sk->sk_receive_queue, skb);
				break;
			}

			kfree_skb(skb);
		} else {
1493
			pr_debug("%s() questionable!?\n", __func__);
L
Linus Torvalds 已提交
1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508

			/* put message back and return */
			skb_queue_head(&sk->sk_receive_queue, skb);
			break;
		}
	} while (size);

	/*
	 *  Check if we have previously stopped IrTTP and we know
	 *  have more free space in our rx_queue. If so tell IrTTP
	 *  to start delivering frames again before our rx_queue gets
	 *  empty
	 */
	if (self->rx_flow == FLOW_STOP) {
		if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1509
			pr_debug("%s(), Starting IrTTP\n", __func__);
L
Linus Torvalds 已提交
1510 1511 1512 1513 1514
			self->rx_flow = FLOW_START;
			irttp_flow_request(self->tsap, FLOW_START);
		}
	}

1515
	return copied;
L
Linus Torvalds 已提交
1516 1517 1518
}

/*
1519
 * Function irda_sendmsg_dgram (sock, msg, len)
L
Linus Torvalds 已提交
1520 1521 1522 1523 1524
 *
 *    Send message down to TinyTP for the unreliable sequenced
 *    packet service...
 *
 */
1525 1526
static int irda_sendmsg_dgram(struct socket *sock, struct msghdr *msg,
			      size_t len)
L
Linus Torvalds 已提交
1527 1528 1529 1530 1531 1532
{
	struct sock *sk = sock->sk;
	struct irda_sock *self;
	struct sk_buff *skb;
	int err;

1533
	pr_debug("%s(), len=%zd\n", __func__, len);
L
Linus Torvalds 已提交
1534 1535

	if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1536 1537 1538
		return -EINVAL;

	lock_sock(sk);
L
Linus Torvalds 已提交
1539 1540 1541

	if (sk->sk_shutdown & SEND_SHUTDOWN) {
		send_sig(SIGPIPE, current, 0);
1542 1543
		err = -EPIPE;
		goto out;
L
Linus Torvalds 已提交
1544 1545
	}

1546
	err = -ENOTCONN;
L
Linus Torvalds 已提交
1547
	if (sk->sk_state != TCP_ESTABLISHED)
1548
		goto out;
L
Linus Torvalds 已提交
1549 1550 1551 1552

	self = irda_sk(sk);

	/*
A
Alexey Dobriyan 已提交
1553
	 * Check that we don't send out too big frames. This is an unreliable
L
Linus Torvalds 已提交
1554 1555 1556
	 * service, so we have no fragmentation and no coalescence
	 */
	if (len > self->max_data_size) {
1557 1558
		pr_debug("%s(), Warning too much data! Chopping frame from %zd to %d bytes!\n",
			 __func__, len, self->max_data_size);
L
Linus Torvalds 已提交
1559 1560 1561 1562 1563
		len = self->max_data_size;
	}

	skb = sock_alloc_send_skb(sk, len + self->max_header_size,
				  msg->msg_flags & MSG_DONTWAIT, &err);
1564
	err = -ENOBUFS;
L
Linus Torvalds 已提交
1565
	if (!skb)
1566
		goto out;
L
Linus Torvalds 已提交
1567 1568

	skb_reserve(skb, self->max_header_size);
1569
	skb_reset_transport_header(skb);
L
Linus Torvalds 已提交
1570

1571
	pr_debug("%s(), appending user data\n", __func__);
1572
	skb_put(skb, len);
A
Al Viro 已提交
1573
	err = memcpy_from_msg(skb_transport_header(skb), msg, len);
L
Linus Torvalds 已提交
1574 1575
	if (err) {
		kfree_skb(skb);
1576
		goto out;
L
Linus Torvalds 已提交
1577 1578 1579 1580 1581 1582 1583 1584
	}

	/*
	 * Just send the message to TinyTP, and let it deal with possible
	 * errors. No need to duplicate all that here
	 */
	err = irttp_udata_request(self->tsap, skb);
	if (err) {
1585
		pr_debug("%s(), err=%d\n", __func__, err);
1586
		goto out;
L
Linus Torvalds 已提交
1587
	}
1588 1589

	release_sock(sk);
L
Linus Torvalds 已提交
1590
	return len;
1591

1592
out:
1593
	release_sock(sk);
1594
	return err;
L
Linus Torvalds 已提交
1595 1596 1597
}

/*
1598
 * Function irda_sendmsg_ultra (sock, msg, len)
L
Linus Torvalds 已提交
1599 1600 1601 1602 1603
 *
 *    Send message down to IrLMP for the unreliable Ultra
 *    packet service...
 */
#ifdef CONFIG_IRDA_ULTRA
1604 1605
static int irda_sendmsg_ultra(struct socket *sock, struct msghdr *msg,
			      size_t len)
L
Linus Torvalds 已提交
1606 1607 1608 1609 1610 1611 1612 1613
{
	struct sock *sk = sock->sk;
	struct irda_sock *self;
	__u8 pid = 0;
	int bound = 0;
	struct sk_buff *skb;
	int err;

1614
	pr_debug("%s(), len=%zd\n", __func__, len);
L
Linus Torvalds 已提交
1615

1616
	err = -EINVAL;
L
Linus Torvalds 已提交
1617
	if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1618 1619 1620
		return -EINVAL;

	lock_sock(sk);
L
Linus Torvalds 已提交
1621

1622
	err = -EPIPE;
L
Linus Torvalds 已提交
1623 1624
	if (sk->sk_shutdown & SEND_SHUTDOWN) {
		send_sig(SIGPIPE, current, 0);
1625
		goto out;
L
Linus Torvalds 已提交
1626 1627 1628 1629 1630 1631
	}

	self = irda_sk(sk);

	/* Check if an address was specified with sendto. Jean II */
	if (msg->msg_name) {
1632
		DECLARE_SOCKADDR(struct sockaddr_irda *, addr, msg->msg_name);
1633
		err = -EINVAL;
L
Linus Torvalds 已提交
1634 1635
		/* Check address, extract pid. Jean II */
		if (msg->msg_namelen < sizeof(*addr))
1636
			goto out;
L
Linus Torvalds 已提交
1637
		if (addr->sir_family != AF_IRDA)
1638
			goto out;
L
Linus Torvalds 已提交
1639 1640 1641

		pid = addr->sir_lsap_sel;
		if (pid & 0x80) {
1642 1643
			pr_debug("%s(), extension in PID not supp!\n",
				 __func__);
1644 1645
			err = -EOPNOTSUPP;
			goto out;
L
Linus Torvalds 已提交
1646 1647 1648 1649 1650 1651
		}
	} else {
		/* Check that the socket is properly bound to an Ultra
		 * port. Jean II */
		if ((self->lsap == NULL) ||
		    (sk->sk_state != TCP_ESTABLISHED)) {
1652 1653
			pr_debug("%s(), socket not bound to Ultra PID.\n",
				 __func__);
1654 1655
			err = -ENOTCONN;
			goto out;
L
Linus Torvalds 已提交
1656 1657 1658 1659 1660 1661
		}
		/* Use PID from socket */
		bound = 1;
	}

	/*
A
Alexey Dobriyan 已提交
1662
	 * Check that we don't send out too big frames. This is an unreliable
L
Linus Torvalds 已提交
1663 1664 1665
	 * service, so we have no fragmentation and no coalescence
	 */
	if (len > self->max_data_size) {
1666 1667
		pr_debug("%s(), Warning too much data! Chopping frame from %zd to %d bytes!\n",
			 __func__, len, self->max_data_size);
L
Linus Torvalds 已提交
1668 1669 1670 1671 1672
		len = self->max_data_size;
	}

	skb = sock_alloc_send_skb(sk, len + self->max_header_size,
				  msg->msg_flags & MSG_DONTWAIT, &err);
1673
	err = -ENOBUFS;
L
Linus Torvalds 已提交
1674
	if (!skb)
1675
		goto out;
L
Linus Torvalds 已提交
1676 1677

	skb_reserve(skb, self->max_header_size);
1678
	skb_reset_transport_header(skb);
L
Linus Torvalds 已提交
1679

1680
	pr_debug("%s(), appending user data\n", __func__);
1681
	skb_put(skb, len);
A
Al Viro 已提交
1682
	err = memcpy_from_msg(skb_transport_header(skb), msg, len);
L
Linus Torvalds 已提交
1683 1684
	if (err) {
		kfree_skb(skb);
1685
		goto out;
L
Linus Torvalds 已提交
1686 1687 1688 1689
	}

	err = irlmp_connless_data_request((bound ? self->lsap : NULL),
					  skb, pid);
1690
	if (err)
1691
		pr_debug("%s(), err=%d\n", __func__, err);
1692
out:
1693
	release_sock(sk);
1694
	return err ? : len;
L
Linus Torvalds 已提交
1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705
}
#endif /* CONFIG_IRDA_ULTRA */

/*
 * Function irda_shutdown (sk, how)
 */
static int irda_shutdown(struct socket *sock, int how)
{
	struct sock *sk = sock->sk;
	struct irda_sock *self = irda_sk(sk);

1706
	pr_debug("%s(%p)\n", __func__, self);
L
Linus Torvalds 已提交
1707

1708
	lock_sock(sk);
1709

L
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1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729
	sk->sk_state       = TCP_CLOSE;
	sk->sk_shutdown   |= SEND_SHUTDOWN;
	sk->sk_state_change(sk);

	if (self->iriap) {
		iriap_close(self->iriap);
		self->iriap = NULL;
	}

	if (self->tsap) {
		irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
		irttp_close_tsap(self->tsap);
		self->tsap = NULL;
	}

	/* A few cleanup so the socket look as good as new... */
	self->rx_flow = self->tx_flow = FLOW_START;	/* needed ??? */
	self->daddr = DEV_ADDR_ANY;	/* Until we get re-connected */
	self->saddr = 0x0;		/* so IrLMP assign us any link */

1730
	release_sock(sk);
1731

1732
	return 0;
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1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744
}

/*
 * Function irda_poll (file, sock, wait)
 */
static unsigned int irda_poll(struct file * file, struct socket *sock,
			      poll_table *wait)
{
	struct sock *sk = sock->sk;
	struct irda_sock *self = irda_sk(sk);
	unsigned int mask;

E
Eric Dumazet 已提交
1745
	poll_wait(file, sk_sleep(sk), wait);
L
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1746 1747 1748 1749 1750 1751
	mask = 0;

	/* Exceptional events? */
	if (sk->sk_err)
		mask |= POLLERR;
	if (sk->sk_shutdown & RCV_SHUTDOWN) {
1752
		pr_debug("%s(), POLLHUP\n", __func__);
L
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1753 1754 1755 1756 1757
		mask |= POLLHUP;
	}

	/* Readable? */
	if (!skb_queue_empty(&sk->sk_receive_queue)) {
1758
		pr_debug("Socket is readable\n");
L
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1759 1760 1761 1762 1763 1764 1765
		mask |= POLLIN | POLLRDNORM;
	}

	/* Connection-based need to check for termination and startup */
	switch (sk->sk_type) {
	case SOCK_STREAM:
		if (sk->sk_state == TCP_CLOSE) {
1766
			pr_debug("%s(), POLLHUP\n", __func__);
L
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1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792
			mask |= POLLHUP;
		}

		if (sk->sk_state == TCP_ESTABLISHED) {
			if ((self->tx_flow == FLOW_START) &&
			    sock_writeable(sk))
			{
				mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
			}
		}
		break;
	case SOCK_SEQPACKET:
		if ((self->tx_flow == FLOW_START) &&
		    sock_writeable(sk))
		{
			mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
		}
		break;
	case SOCK_DGRAM:
		if (sock_writeable(sk))
			mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
		break;
	default:
		break;
	}

1793
	return mask;
1794 1795
}

L
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/*
 * Function irda_ioctl (sock, cmd, arg)
 */
static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
	struct sock *sk = sock->sk;
1802
	int err;
L
Linus Torvalds 已提交
1803

1804
	pr_debug("%s(), cmd=%#x\n", __func__, cmd);
L
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1805

1806
	err = -EINVAL;
L
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1807 1808 1809
	switch (cmd) {
	case TIOCOUTQ: {
		long amount;
1810 1811

		amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
L
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1812 1813
		if (amount < 0)
			amount = 0;
1814 1815
		err = put_user(amount, (unsigned int __user *)arg);
		break;
L
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1816 1817 1818 1819 1820 1821 1822 1823
	}

	case TIOCINQ: {
		struct sk_buff *skb;
		long amount = 0L;
		/* These two are safe on a single CPU system as only user tasks fiddle here */
		if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
			amount = skb->len;
1824 1825
		err = put_user(amount, (unsigned int __user *)arg);
		break;
L
Linus Torvalds 已提交
1826 1827 1828 1829
	}

	case SIOCGSTAMP:
		if (sk != NULL)
1830 1831
			err = sock_get_timestamp(sk, (struct timeval __user *)arg);
		break;
L
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1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842

	case SIOCGIFADDR:
	case SIOCSIFADDR:
	case SIOCGIFDSTADDR:
	case SIOCSIFDSTADDR:
	case SIOCGIFBRDADDR:
	case SIOCSIFBRDADDR:
	case SIOCGIFNETMASK:
	case SIOCSIFNETMASK:
	case SIOCGIFMETRIC:
	case SIOCSIFMETRIC:
1843
		break;
L
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1844
	default:
1845
		pr_debug("%s(), doing device ioctl!\n", __func__);
1846
		err = -ENOIOCTLCMD;
L
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1847 1848
	}

1849
	return err;
L
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1850 1851
}

1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864
#ifdef CONFIG_COMPAT
/*
 * Function irda_ioctl (sock, cmd, arg)
 */
static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
	/*
	 * All IRDA's ioctl are standard ones.
	 */
	return -ENOIOCTLCMD;
}
#endif

L
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1865 1866 1867 1868 1869 1870
/*
 * Function irda_setsockopt (sock, level, optname, optval, optlen)
 *
 *    Set some options for the socket
 *
 */
1871
static int irda_setsockopt(struct socket *sock, int level, int optname,
1872
			   char __user *optval, unsigned int optlen)
L
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1873 1874 1875 1876 1877 1878
{
	struct sock *sk = sock->sk;
	struct irda_sock *self = irda_sk(sk);
	struct irda_ias_set    *ias_opt;
	struct ias_object      *ias_obj;
	struct ias_attrib *	ias_attr;	/* Attribute in IAS object */
1879
	int opt, free_ias = 0, err = 0;
L
Linus Torvalds 已提交
1880

1881
	pr_debug("%s(%p)\n", __func__, self);
L
Linus Torvalds 已提交
1882 1883 1884 1885

	if (level != SOL_IRLMP)
		return -ENOPROTOOPT;

1886 1887
	lock_sock(sk);

L
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1888 1889 1890 1891 1892 1893 1894 1895 1896
	switch (optname) {
	case IRLMP_IAS_SET:
		/* The user want to add an attribute to an existing IAS object
		 * (in the IAS database) or to create a new object with this
		 * attribute.
		 * We first query IAS to know if the object exist, and then
		 * create the right attribute...
		 */

1897 1898 1899 1900
		if (optlen != sizeof(struct irda_ias_set)) {
			err = -EINVAL;
			goto out;
		}
L
Linus Torvalds 已提交
1901 1902

		ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1903 1904 1905 1906
		if (ias_opt == NULL) {
			err = -ENOMEM;
			goto out;
		}
L
Linus Torvalds 已提交
1907 1908 1909 1910

		/* Copy query to the driver. */
		if (copy_from_user(ias_opt, optval, optlen)) {
			kfree(ias_opt);
1911 1912
			err = -EFAULT;
			goto out;
L
Linus Torvalds 已提交
1913 1914 1915 1916 1917 1918 1919 1920 1921
		}

		/* Find the object we target.
		 * If the user gives us an empty string, we use the object
		 * associated with this socket. This will workaround
		 * duplicated class name - Jean II */
		if(ias_opt->irda_class_name[0] == '\0') {
			if(self->ias_obj == NULL) {
				kfree(ias_opt);
1922 1923
				err = -EINVAL;
				goto out;
L
Linus Torvalds 已提交
1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934
			}
			ias_obj = self->ias_obj;
		} else
			ias_obj = irias_find_object(ias_opt->irda_class_name);

		/* Only ROOT can mess with the global IAS database.
		 * Users can only add attributes to the object associated
		 * with the socket they own - Jean II */
		if((!capable(CAP_NET_ADMIN)) &&
		   ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
			kfree(ias_opt);
1935 1936
			err = -EPERM;
			goto out;
L
Linus Torvalds 已提交
1937 1938 1939 1940 1941 1942 1943
		}

		/* If the object doesn't exist, create it */
		if(ias_obj == (struct ias_object *) NULL) {
			/* Create a new object */
			ias_obj = irias_new_object(ias_opt->irda_class_name,
						   jiffies);
1944 1945
			if (ias_obj == NULL) {
				kfree(ias_opt);
1946 1947
				err = -ENOMEM;
				goto out;
1948 1949
			}
			free_ias = 1;
L
Linus Torvalds 已提交
1950 1951 1952 1953 1954
		}

		/* Do we have the attribute already ? */
		if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
			kfree(ias_opt);
1955 1956 1957 1958
			if (free_ias) {
				kfree(ias_obj->name);
				kfree(ias_obj);
			}
1959 1960
			err = -EINVAL;
			goto out;
L
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1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977
		}

		/* Look at the type */
		switch(ias_opt->irda_attrib_type) {
		case IAS_INTEGER:
			/* Add an integer attribute */
			irias_add_integer_attrib(
				ias_obj,
				ias_opt->irda_attrib_name,
				ias_opt->attribute.irda_attrib_int,
				IAS_USER_ATTR);
			break;
		case IAS_OCT_SEQ:
			/* Check length */
			if(ias_opt->attribute.irda_attrib_octet_seq.len >
			   IAS_MAX_OCTET_STRING) {
				kfree(ias_opt);
1978 1979 1980 1981 1982
				if (free_ias) {
					kfree(ias_obj->name);
					kfree(ias_obj);
				}

1983 1984
				err = -EINVAL;
				goto out;
L
Linus Torvalds 已提交
1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
			}
			/* Add an octet sequence attribute */
			irias_add_octseq_attrib(
			      ias_obj,
			      ias_opt->irda_attrib_name,
			      ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
			      ias_opt->attribute.irda_attrib_octet_seq.len,
			      IAS_USER_ATTR);
			break;
		case IAS_STRING:
			/* Should check charset & co */
			/* Check length */
			/* The length is encoded in a __u8, and
			 * IAS_MAX_STRING == 256, so there is no way
			 * userspace can pass us a string too large.
			 * Jean II */
			/* NULL terminate the string (avoid troubles) */
			ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
			/* Add a string attribute */
			irias_add_string_attrib(
				ias_obj,
				ias_opt->irda_attrib_name,
				ias_opt->attribute.irda_attrib_string.string,
				IAS_USER_ATTR);
			break;
		default :
			kfree(ias_opt);
2012 2013 2014 2015
			if (free_ias) {
				kfree(ias_obj->name);
				kfree(ias_obj);
			}
2016 2017
			err = -EINVAL;
			goto out;
L
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2018 2019 2020 2021 2022 2023 2024 2025 2026 2027
		}
		irias_insert_object(ias_obj);
		kfree(ias_opt);
		break;
	case IRLMP_IAS_DEL:
		/* The user want to delete an object from our local IAS
		 * database. We just need to query the IAS, check is the
		 * object is not owned by the kernel and delete it.
		 */

2028 2029 2030 2031
		if (optlen != sizeof(struct irda_ias_set)) {
			err = -EINVAL;
			goto out;
		}
L
Linus Torvalds 已提交
2032 2033

		ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2034 2035 2036 2037
		if (ias_opt == NULL) {
			err = -ENOMEM;
			goto out;
		}
L
Linus Torvalds 已提交
2038 2039 2040 2041

		/* Copy query to the driver. */
		if (copy_from_user(ias_opt, optval, optlen)) {
			kfree(ias_opt);
2042 2043
			err = -EFAULT;
			goto out;
L
Linus Torvalds 已提交
2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055
		}

		/* Find the object we target.
		 * If the user gives us an empty string, we use the object
		 * associated with this socket. This will workaround
		 * duplicated class name - Jean II */
		if(ias_opt->irda_class_name[0] == '\0')
			ias_obj = self->ias_obj;
		else
			ias_obj = irias_find_object(ias_opt->irda_class_name);
		if(ias_obj == (struct ias_object *) NULL) {
			kfree(ias_opt);
2056 2057
			err = -EINVAL;
			goto out;
L
Linus Torvalds 已提交
2058 2059 2060 2061 2062 2063 2064 2065
		}

		/* Only ROOT can mess with the global IAS database.
		 * Users can only del attributes from the object associated
		 * with the socket they own - Jean II */
		if((!capable(CAP_NET_ADMIN)) &&
		   ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
			kfree(ias_opt);
2066 2067
			err = -EPERM;
			goto out;
L
Linus Torvalds 已提交
2068 2069 2070 2071 2072 2073 2074
		}

		/* Find the attribute (in the object) we target */
		ias_attr = irias_find_attrib(ias_obj,
					     ias_opt->irda_attrib_name);
		if(ias_attr == (struct ias_attrib *) NULL) {
			kfree(ias_opt);
2075 2076
			err = -EINVAL;
			goto out;
L
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2077 2078 2079 2080
		}

		/* Check is the user space own the object */
		if(ias_attr->value->owner != IAS_USER_ATTR) {
2081 2082
			pr_debug("%s(), attempting to delete a kernel attribute\n",
				 __func__);
L
Linus Torvalds 已提交
2083
			kfree(ias_opt);
2084 2085
			err = -EPERM;
			goto out;
L
Linus Torvalds 已提交
2086 2087 2088 2089 2090 2091 2092
		}

		/* Remove the attribute (and maybe the object) */
		irias_delete_attrib(ias_obj, ias_attr, 1);
		kfree(ias_opt);
		break;
	case IRLMP_MAX_SDU_SIZE:
2093 2094 2095 2096
		if (optlen < sizeof(int)) {
			err = -EINVAL;
			goto out;
		}
L
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2097

2098 2099 2100 2101
		if (get_user(opt, (int __user *)optval)) {
			err = -EFAULT;
			goto out;
		}
L
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2102 2103 2104

		/* Only possible for a seqpacket service (TTP with SAR) */
		if (sk->sk_type != SOCK_SEQPACKET) {
2105 2106
			pr_debug("%s(), setting max_sdu_size = %d\n",
				 __func__, opt);
L
Linus Torvalds 已提交
2107 2108
			self->max_sdu_size_rx = opt;
		} else {
2109 2110
			net_warn_ratelimited("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
					     __func__);
2111 2112
			err = -ENOPROTOOPT;
			goto out;
L
Linus Torvalds 已提交
2113 2114 2115
		}
		break;
	case IRLMP_HINTS_SET:
2116 2117 2118 2119
		if (optlen < sizeof(int)) {
			err = -EINVAL;
			goto out;
		}
L
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2120 2121

		/* The input is really a (__u8 hints[2]), easier as an int */
2122 2123 2124 2125
		if (get_user(opt, (int __user *)optval)) {
			err = -EFAULT;
			goto out;
		}
L
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2126 2127

		/* Unregister any old registration */
2128
		irlmp_unregister_service(self->skey);
L
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2129 2130 2131 2132 2133 2134 2135 2136 2137

		self->skey = irlmp_register_service((__u16) opt);
		break;
	case IRLMP_HINT_MASK_SET:
		/* As opposed to the previous case which set the hint bits
		 * that we advertise, this one set the filter we use when
		 * making a discovery (nodes which don't match any hint
		 * bit in the mask are not reported).
		 */
2138 2139 2140 2141
		if (optlen < sizeof(int)) {
			err = -EINVAL;
			goto out;
		}
L
Linus Torvalds 已提交
2142 2143

		/* The input is really a (__u8 hints[2]), easier as an int */
2144 2145 2146 2147
		if (get_user(opt, (int __user *)optval)) {
			err = -EFAULT;
			goto out;
		}
L
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2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158

		/* Set the new hint mask */
		self->mask.word = (__u16) opt;
		/* Mask out extension bits */
		self->mask.word &= 0x7f7f;
		/* Check if no bits */
		if(!self->mask.word)
			self->mask.word = 0xFFFF;

		break;
	default:
2159 2160
		err = -ENOPROTOOPT;
		break;
L
Linus Torvalds 已提交
2161 2162
	}

2163 2164
out:
	release_sock(sk);
2165 2166 2167 2168

	return err;
}

L
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2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220
/*
 * Function irda_extract_ias_value(ias_opt, ias_value)
 *
 *    Translate internal IAS value structure to the user space representation
 *
 * The external representation of IAS values, as we exchange them with
 * user space program is quite different from the internal representation,
 * as stored in the IAS database (because we need a flat structure for
 * crossing kernel boundary).
 * This function transform the former in the latter. We also check
 * that the value type is valid.
 */
static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
				  struct ias_value *ias_value)
{
	/* Look at the type */
	switch (ias_value->type) {
	case IAS_INTEGER:
		/* Copy the integer */
		ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
		break;
	case IAS_OCT_SEQ:
		/* Set length */
		ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
		/* Copy over */
		memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
		       ias_value->t.oct_seq, ias_value->len);
		break;
	case IAS_STRING:
		/* Set length */
		ias_opt->attribute.irda_attrib_string.len = ias_value->len;
		ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
		/* Copy over */
		memcpy(ias_opt->attribute.irda_attrib_string.string,
		       ias_value->t.string, ias_value->len);
		/* NULL terminate the string (avoid troubles) */
		ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
		break;
	case IAS_MISSING:
	default :
		return -EINVAL;
	}

	/* Copy type over */
	ias_opt->irda_attrib_type = ias_value->type;

	return 0;
}

/*
 * Function irda_getsockopt (sock, level, optname, optval, optlen)
 */
2221
static int irda_getsockopt(struct socket *sock, int level, int optname,
L
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2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233
			   char __user *optval, int __user *optlen)
{
	struct sock *sk = sock->sk;
	struct irda_sock *self = irda_sk(sk);
	struct irda_device_list list;
	struct irda_device_info *discoveries;
	struct irda_ias_set *	ias_opt;	/* IAS get/query params */
	struct ias_object *	ias_obj;	/* Object in IAS */
	struct ias_attrib *	ias_attr;	/* Attribute in IAS object */
	int daddr = DEV_ADDR_ANY;	/* Dest address for IAS queries */
	int val = 0;
	int len = 0;
2234
	int err = 0;
L
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2235 2236
	int offset, total;

2237
	pr_debug("%s(%p)\n", __func__, self);
L
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2238 2239 2240 2241 2242 2243 2244 2245 2246 2247

	if (level != SOL_IRLMP)
		return -ENOPROTOOPT;

	if (get_user(len, optlen))
		return -EFAULT;

	if(len < 0)
		return -EINVAL;

2248 2249
	lock_sock(sk);

L
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	switch (optname) {
	case IRLMP_ENUMDEVICES:
2252 2253 2254 2255 2256 2257 2258 2259 2260 2261

		/* Offset to first device entry */
		offset = sizeof(struct irda_device_list) -
			sizeof(struct irda_device_info);

		if (len < offset) {
			err = -EINVAL;
			goto out;
		}

L
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		/* Ask lmp for the current discovery log */
		discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
						    self->nslots);
		/* Check if the we got some results */
2266 2267 2268 2269
		if (discoveries == NULL) {
			err = -EAGAIN;
			goto out;		/* Didn't find any devices */
		}
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2270 2271

		/* Write total list length back to client */
2272
		if (copy_to_user(optval, &list, offset))
L
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2273 2274 2275
			err = -EFAULT;

		/* Copy the list itself - watch for overflow */
2276
		if (list.len > 2048) {
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2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295
			err = -EINVAL;
			goto bed;
		}
		total = offset + (list.len * sizeof(struct irda_device_info));
		if (total > len)
			total = len;
		if (copy_to_user(optval+offset, discoveries, total - offset))
			err = -EFAULT;

		/* Write total number of bytes used back to client */
		if (put_user(total, optlen))
			err = -EFAULT;
bed:
		/* Free up our buffer */
		kfree(discoveries);
		break;
	case IRLMP_MAX_SDU_SIZE:
		val = self->max_data_size;
		len = sizeof(int);
2296 2297 2298 2299 2300 2301 2302 2303 2304
		if (put_user(len, optlen)) {
			err = -EFAULT;
			goto out;
		}

		if (copy_to_user(optval, &val, len)) {
			err = -EFAULT;
			goto out;
		}
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		break;
	case IRLMP_IAS_GET:
		/* The user want an object from our local IAS database.
		 * We just need to query the IAS and return the value
		 * that we found */

		/* Check that the user has allocated the right space for us */
2313 2314 2315 2316
		if (len != sizeof(struct irda_ias_set)) {
			err = -EINVAL;
			goto out;
		}
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		ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2319 2320 2321 2322
		if (ias_opt == NULL) {
			err = -ENOMEM;
			goto out;
		}
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		/* Copy query to the driver. */
		if (copy_from_user(ias_opt, optval, len)) {
			kfree(ias_opt);
2327 2328
			err = -EFAULT;
			goto out;
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		}

		/* Find the object we target.
		 * If the user gives us an empty string, we use the object
		 * associated with this socket. This will workaround
		 * duplicated class name - Jean II */
		if(ias_opt->irda_class_name[0] == '\0')
			ias_obj = self->ias_obj;
		else
			ias_obj = irias_find_object(ias_opt->irda_class_name);
		if(ias_obj == (struct ias_object *) NULL) {
			kfree(ias_opt);
2341 2342
			err = -EINVAL;
			goto out;
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		}

		/* Find the attribute (in the object) we target */
		ias_attr = irias_find_attrib(ias_obj,
					     ias_opt->irda_attrib_name);
		if(ias_attr == (struct ias_attrib *) NULL) {
			kfree(ias_opt);
2350 2351
			err = -EINVAL;
			goto out;
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		}

		/* Translate from internal to user structure */
		err = irda_extract_ias_value(ias_opt, ias_attr->value);
		if(err) {
			kfree(ias_opt);
2358
			goto out;
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		}

		/* Copy reply to the user */
		if (copy_to_user(optval, ias_opt,
				 sizeof(struct irda_ias_set))) {
			kfree(ias_opt);
2365 2366
			err = -EFAULT;
			goto out;
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		}
		/* Note : don't need to put optlen, we checked it */
		kfree(ias_opt);
		break;
	case IRLMP_IAS_QUERY:
		/* The user want an object from a remote IAS database.
		 * We need to use IAP to query the remote database and
		 * then wait for the answer to come back. */

		/* Check that the user has allocated the right space for us */
2377 2378 2379 2380
		if (len != sizeof(struct irda_ias_set)) {
			err = -EINVAL;
			goto out;
		}
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		ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2383 2384 2385 2386
		if (ias_opt == NULL) {
			err = -ENOMEM;
			goto out;
		}
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		/* Copy query to the driver. */
		if (copy_from_user(ias_opt, optval, len)) {
			kfree(ias_opt);
2391 2392
			err = -EFAULT;
			goto out;
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		}

		/* At this point, there are two cases...
		 * 1) the socket is connected - that's the easy case, we
		 *	just query the device we are connected to...
		 * 2) the socket is not connected - the user doesn't want
		 *	to connect and/or may not have a valid service name
		 *	(so can't create a fake connection). In this case,
		 *	we assume that the user pass us a valid destination
		 *	address in the requesting structure...
		 */
		if(self->daddr != DEV_ADDR_ANY) {
			/* We are connected - reuse known daddr */
			daddr = self->daddr;
		} else {
			/* We are not connected, we must specify a valid
			 * destination address */
			daddr = ias_opt->daddr;
			if((!daddr) || (daddr == DEV_ADDR_ANY)) {
				kfree(ias_opt);
2413 2414
				err = -EINVAL;
				goto out;
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			}
		}

		/* Check that we can proceed with IAP */
		if (self->iriap) {
2420 2421
			net_warn_ratelimited("%s: busy with a previous query\n",
					     __func__);
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			kfree(ias_opt);
2423 2424
			err = -EBUSY;
			goto out;
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		}

		self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
					 irda_getvalue_confirm);

		if (self->iriap == NULL) {
			kfree(ias_opt);
2432 2433
			err = -ENOMEM;
			goto out;
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		}

		/* Treat unexpected wakeup as disconnect */
		self->errno = -EHOSTUNREACH;

		/* Query remote LM-IAS */
		iriap_getvaluebyclass_request(self->iriap,
					      self->saddr, daddr,
					      ias_opt->irda_class_name,
					      ias_opt->irda_attrib_name);

		/* Wait for answer, if not yet finished (or failed) */
		if (wait_event_interruptible(self->query_wait,
					     (self->iriap == NULL))) {
			/* pending request uses copy of ias_opt-content
			 * we can free it regardless! */
			kfree(ias_opt);
			/* Treat signals as disconnect */
2452 2453
			err = -EHOSTUNREACH;
			goto out;
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		}

		/* Check what happened */
		if (self->errno)
		{
			kfree(ias_opt);
			/* Requested object/attribute doesn't exist */
			if((self->errno == IAS_CLASS_UNKNOWN) ||
			   (self->errno == IAS_ATTRIB_UNKNOWN))
2463
				err = -EADDRNOTAVAIL;
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			else
2465 2466 2467
				err = -EHOSTUNREACH;

			goto out;
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		}

		/* Translate from internal to user structure */
		err = irda_extract_ias_value(ias_opt, self->ias_result);
		if (self->ias_result)
			irias_delete_value(self->ias_result);
		if (err) {
			kfree(ias_opt);
2476
			goto out;
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		}

		/* Copy reply to the user */
		if (copy_to_user(optval, ias_opt,
				 sizeof(struct irda_ias_set))) {
			kfree(ias_opt);
2483 2484
			err = -EFAULT;
			goto out;
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		}
		/* Note : don't need to put optlen, we checked it */
		kfree(ias_opt);
		break;
	case IRLMP_WAITDEVICE:
		/* This function is just another way of seeing life ;-)
		 * IRLMP_ENUMDEVICES assumes that you have a static network,
		 * and that you just want to pick one of the devices present.
		 * On the other hand, in here we assume that no device is
		 * present and that at some point in the future a device will
		 * come into range. When this device arrive, we just wake
		 * up the caller, so that he has time to connect to it before
		 * the device goes away...
		 * Note : once the node has been discovered for more than a
		 * few second, it won't trigger this function, unless it
		 * goes away and come back changes its hint bits (so we
		 * might call it IRLMP_WAITNEWDEVICE).
		 */

		/* Check that the user is passing us an int */
2505 2506 2507 2508
		if (len != sizeof(int)) {
			err = -EINVAL;
			goto out;
		}
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		/* Get timeout in ms (max time we block the caller) */
2510 2511 2512 2513
		if (get_user(val, (int __user *)optval)) {
			err = -EFAULT;
			goto out;
		}
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		/* Tell IrLMP we want to be notified */
		irlmp_update_client(self->ckey, self->mask.word,
				    irda_selective_discovery_indication,
				    NULL, (void *) self);

		/* Do some discovery (and also return cached results) */
		irlmp_discovery_request(self->nslots);

		/* Wait until a node is discovered */
		if (!self->cachedaddr) {
2525 2526
			pr_debug("%s(), nothing discovered yet, going to sleep...\n",
				 __func__);
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			/* Set watchdog timer to expire in <val> ms. */
			self->errno = 0;
2530 2531
			setup_timer(&self->watchdog, irda_discovery_timeout,
					(unsigned long)self);
2532 2533
			mod_timer(&self->watchdog,
				  jiffies + msecs_to_jiffies(val));
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			/* Wait for IR-LMP to call us back */
2536 2537
			err = __wait_event_interruptible(self->query_wait,
			      (self->cachedaddr != 0 || self->errno == -ETIME));
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			/* If watchdog is still activated, kill it! */
2540
			del_timer(&(self->watchdog));
L
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2542
			pr_debug("%s(), ...waking up !\n", __func__);
L
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2543

2544 2545
			if (err != 0)
				goto out;
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		}
		else
2548 2549
			pr_debug("%s(), found immediately !\n",
				 __func__);
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		/* Tell IrLMP that we have been notified */
		irlmp_update_client(self->ckey, self->mask.word,
				    NULL, NULL, NULL);

		/* Check if the we got some results */
2556 2557 2558 2559
		if (!self->cachedaddr) {
			err = -EAGAIN;		/* Didn't find any devices */
			goto out;
		}
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		daddr = self->cachedaddr;
		/* Cleanup */
		self->cachedaddr = 0;

		/* We return the daddr of the device that trigger the
		 * wakeup. As irlmp pass us only the new devices, we
		 * are sure that it's not an old device.
		 * If the user want more details, he should query
		 * the whole discovery log and pick one device...
		 */
2570 2571 2572 2573
		if (put_user(daddr, (int __user *)optval)) {
			err = -EFAULT;
			goto out;
		}
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		break;
	default:
2577
		err = -ENOPROTOOPT;
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	}

2580
out:
2581

2582
	release_sock(sk);
2583 2584 2585 2586

	return err;
}

2587
static const struct net_proto_family irda_family_ops = {
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	.family = PF_IRDA,
	.create = irda_create,
	.owner	= THIS_MODULE,
};

2593
static const struct proto_ops irda_stream_ops = {
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	.family =	PF_IRDA,
	.owner =	THIS_MODULE,
	.release =	irda_release,
	.bind =		irda_bind,
	.connect =	irda_connect,
	.socketpair =	sock_no_socketpair,
	.accept =	irda_accept,
	.getname =	irda_getname,
	.poll =		irda_poll,
	.ioctl =	irda_ioctl,
2604 2605 2606
#ifdef CONFIG_COMPAT
	.compat_ioctl =	irda_compat_ioctl,
#endif
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	.listen =	irda_listen,
	.shutdown =	irda_shutdown,
	.setsockopt =	irda_setsockopt,
	.getsockopt =	irda_getsockopt,
	.sendmsg =	irda_sendmsg,
	.recvmsg =	irda_recvmsg_stream,
	.mmap =		sock_no_mmap,
	.sendpage =	sock_no_sendpage,
};

2617
static const struct proto_ops irda_seqpacket_ops = {
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	.family =	PF_IRDA,
	.owner =	THIS_MODULE,
	.release =	irda_release,
	.bind =		irda_bind,
	.connect =	irda_connect,
	.socketpair =	sock_no_socketpair,
	.accept =	irda_accept,
	.getname =	irda_getname,
2626
	.poll =		datagram_poll,
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2627
	.ioctl =	irda_ioctl,
2628 2629 2630
#ifdef CONFIG_COMPAT
	.compat_ioctl =	irda_compat_ioctl,
#endif
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2631 2632 2633 2634 2635 2636 2637 2638 2639 2640
	.listen =	irda_listen,
	.shutdown =	irda_shutdown,
	.setsockopt =	irda_setsockopt,
	.getsockopt =	irda_getsockopt,
	.sendmsg =	irda_sendmsg,
	.recvmsg =	irda_recvmsg_dgram,
	.mmap =		sock_no_mmap,
	.sendpage =	sock_no_sendpage,
};

2641
static const struct proto_ops irda_dgram_ops = {
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2642 2643 2644 2645 2646 2647 2648 2649
	.family =	PF_IRDA,
	.owner =	THIS_MODULE,
	.release =	irda_release,
	.bind =		irda_bind,
	.connect =	irda_connect,
	.socketpair =	sock_no_socketpair,
	.accept =	irda_accept,
	.getname =	irda_getname,
2650
	.poll =		datagram_poll,
L
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2651
	.ioctl =	irda_ioctl,
2652 2653 2654
#ifdef CONFIG_COMPAT
	.compat_ioctl =	irda_compat_ioctl,
#endif
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2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665
	.listen =	irda_listen,
	.shutdown =	irda_shutdown,
	.setsockopt =	irda_setsockopt,
	.getsockopt =	irda_getsockopt,
	.sendmsg =	irda_sendmsg_dgram,
	.recvmsg =	irda_recvmsg_dgram,
	.mmap =		sock_no_mmap,
	.sendpage =	sock_no_sendpage,
};

#ifdef CONFIG_IRDA_ULTRA
2666
static const struct proto_ops irda_ultra_ops = {
L
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2667 2668 2669 2670 2671 2672 2673 2674
	.family =	PF_IRDA,
	.owner =	THIS_MODULE,
	.release =	irda_release,
	.bind =		irda_bind,
	.connect =	sock_no_connect,
	.socketpair =	sock_no_socketpair,
	.accept =	sock_no_accept,
	.getname =	irda_getname,
2675
	.poll =		datagram_poll,
L
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2676
	.ioctl =	irda_ioctl,
2677 2678 2679
#ifdef CONFIG_COMPAT
	.compat_ioctl =	irda_compat_ioctl,
#endif
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	.listen =	sock_no_listen,
	.shutdown =	irda_shutdown,
	.setsockopt =	irda_setsockopt,
	.getsockopt =	irda_getsockopt,
	.sendmsg =	irda_sendmsg_ultra,
	.recvmsg =	irda_recvmsg_dgram,
	.mmap =		sock_no_mmap,
	.sendpage =	sock_no_sendpage,
};
#endif /* CONFIG_IRDA_ULTRA */

/*
 * Function irsock_init (pro)
 *
 *    Initialize IrDA protocol
 *
 */
int __init irsock_init(void)
{
	int rc = proto_register(&irda_proto, 0);

	if (rc == 0)
		rc = sock_register(&irda_family_ops);

	return rc;
}

/*
 * Function irsock_cleanup (void)
 *
 *    Remove IrDA protocol
 *
 */
2713
void irsock_cleanup(void)
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{
	sock_unregister(PF_IRDA);
	proto_unregister(&irda_proto);
}
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