Initial import

1 files changed, 2716 insertions, 0 deletions

diff --git a/net/irda/af_irda.c b/net/irda/af_irda.c
new file mode 100644
index 000000000..ee0ea25c8
--- /dev/null
+++ b/net/irda/af_irda.c
@@ -0,0 +1,2716 @@
+/*********************************************************************
+ *
+ * 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
+ *     along with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ *     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
+ *
+ ********************************************************************/
+
+#include <linux/capability.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/slab.h>
+#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>
+#include <net/tcp_states.h>
+
+#include <net/irda/af_irda.h>
+
+static int irda_create(struct net *net, struct socket *sock, int protocol, int kern);
+
+static const struct proto_ops irda_stream_ops;
+static const struct proto_ops irda_seqpacket_ops;
+static const struct proto_ops irda_dgram_ops;
+
+#ifdef CONFIG_IRDA_ULTRA
+static const struct proto_ops irda_ultra_ops;
+#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) {
+		pr_debug("%s(), error: no more mem!\n", __func__);
+		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;
+
+	pr_debug("%s(%p)\n", __func__, self);
+
+	/* Don't care about it, but let's not leak it */
+	if(skb)
+		dev_kfree_skb(skb);
+
+	sk = instance;
+	if (sk == NULL) {
+		pr_debug("%s(%p) : BUG : sk is NULL\n",
+			 __func__, self);
+		return;
+	}
+
+	/* Prevent race conditions with irda_release() and irda_shutdown() */
+	bh_lock_sock(sk);
+	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;
+		}
+	}
+	bh_unlock_sock(sk);
+
+	/* 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;
+
+	pr_debug("%s(%p)\n", __func__, self);
+
+	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) {
+			net_err_ratelimited("%s: max_sdu_size must be 0\n",
+					    __func__);
+			return;
+		}
+		self->max_data_size = irttp_get_max_seg_size(self->tsap);
+		break;
+	case SOCK_SEQPACKET:
+		if (max_sdu_size == 0) {
+			net_err_ratelimited("%s: max_sdu_size cannot be 0\n",
+					    __func__);
+			return;
+		}
+		self->max_data_size = max_sdu_size;
+		break;
+	default:
+		self->max_data_size = irttp_get_max_seg_size(self->tsap);
+	}
+
+	pr_debug("%s(), max_data_size=%d\n", __func__,
+		 self->max_data_size);
+
+	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;
+
+	pr_debug("%s(%p)\n", __func__, self);
+
+	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) {
+			net_err_ratelimited("%s: max_sdu_size must be 0\n",
+					    __func__);
+			kfree_skb(skb);
+			return;
+		}
+		self->max_data_size = irttp_get_max_seg_size(self->tsap);
+		break;
+	case SOCK_SEQPACKET:
+		if (max_sdu_size == 0) {
+			net_err_ratelimited("%s: max_sdu_size cannot be 0\n",
+					    __func__);
+			kfree_skb(skb);
+			return;
+		}
+		self->max_data_size = max_sdu_size;
+		break;
+	default:
+		self->max_data_size = irttp_get_max_seg_size(self->tsap);
+	}
+
+	pr_debug("%s(), max_data_size=%d\n", __func__,
+		 self->max_data_size);
+
+	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;
+
+	skb = alloc_skb(TTP_MAX_HEADER + TTP_SAR_HEADER, GFP_KERNEL);
+	if (skb == NULL) {
+		pr_debug("%s() Unable to allocate sk_buff!\n",
+			 __func__);
+		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;
+	BUG_ON(sk == NULL);
+
+	switch (flow) {
+	case FLOW_STOP:
+		pr_debug("%s(), IrTTP wants us to slow down\n",
+			 __func__);
+		self->tx_flow = flow;
+		break;
+	case FLOW_START:
+		self->tx_flow = flow;
+		pr_debug("%s(), IrTTP wants us to start again\n",
+			 __func__);
+		wake_up_interruptible(sk_sleep(sk));
+		break;
+	default:
+		pr_debug("%s(), Unknown flow command!\n", __func__);
+		/* 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;
+
+	self = priv;
+	if (!self) {
+		net_warn_ratelimited("%s: lost myself!\n", __func__);
+		return;
+	}
+
+	pr_debug("%s(%p)\n", __func__, self);
+
+	/* 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) {
+		pr_debug("%s(), IAS query failed! (%d)\n", __func__,
+			 result);
+
+		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;
+
+	self = priv;
+	if (!self) {
+		net_warn_ratelimited("%s: lost myself!\n", __func__);
+		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;
+	BUG_ON(self == NULL);
+
+	/* 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) {
+		pr_debug("%s: busy!\n", __func__);
+		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) {
+		pr_debug("%s(), Unable to allocate TSAP!\n",
+			 __func__);
+		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) {
+		net_warn_ratelimited("%s(), busy!\n", __func__);
+		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) {
+		pr_debug("%s(), Unable to allocate LSAP!\n", __func__);
+		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)
+{
+	pr_debug("%s(%p, %s)\n", __func__, self, name);
+
+	if (self->iriap) {
+		net_warn_ratelimited("%s(): busy with a previous query\n",
+				     __func__);
+		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))
+			return -EADDRNOTAVAIL;
+		else
+			return -EHOSTUNREACH;
+	}
+
+	/* Get the remote TSAP selector */
+	switch (self->ias_result->type) {
+	case IAS_INTEGER:
+		pr_debug("%s() int=%d\n",
+			 __func__, self->ias_result->t.integer);
+
+		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;
+		pr_debug("%s(), bad type!\n", __func__);
+		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 */
+
+	pr_debug("%s(), name=%s\n", __func__, name);
+
+	/* 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;
+		pr_debug("%s(), trying daddr = %08x\n",
+			 __func__, self->daddr);
+
+		/* 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) {
+				pr_debug("%s(), discovered service ''%s'' in two different devices !!!\n",
+					 __func__, name);
+				self->daddr = DEV_ADDR_ANY;
+				kfree(discoveries);
+				return -ENOTUNIQ;
+			}
+			/* 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 :-( */
+			pr_debug("%s(), unexpected IAS query failure\n",
+				 __func__);
+			self->daddr = DEV_ADDR_ANY;
+			kfree(discoveries);
+			return -EHOSTUNREACH;
+		}
+	}
+	/* Cleanup our copy of the discovery log */
+	kfree(discoveries);
+
+	/* Check out what we found */
+	if(daddr == DEV_ADDR_ANY) {
+		pr_debug("%s(), cannot discover service ''%s'' in any device !!!\n",
+			 __func__, name);
+		self->daddr = DEV_ADDR_ANY;
+		return -EADDRNOTAVAIL;
+	}
+
+	/* Revert back to discovered device & service */
+	self->daddr = daddr;
+	self->saddr = 0x0;
+	self->dtsap_sel = dtsap_sel;
+
+	pr_debug("%s(), discovered requested service ''%s'' at address %08x\n",
+		 __func__, name, self->daddr);
+
+	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);
+
+	memset(&saddr, 0, sizeof(saddr));
+	if (peer) {
+		if (sk->sk_state != TCP_ESTABLISHED)
+			return -ENOTCONN;
+
+		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;
+	}
+
+	pr_debug("%s(), tsap_sel = %#x\n", __func__, saddr.sir_lsap_sel);
+	pr_debug("%s(), addr = %08x\n", __func__, saddr.sir_addr);
+
+	/* uaddr_len come to us uninitialised */
+	*uaddr_len = sizeof (struct sockaddr_irda);
+	memcpy(uaddr, &saddr, *uaddr_len);
+
+	return 0;
+}
+
+/*
+ * 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;
+	int err = -EOPNOTSUPP;
+
+	lock_sock(sk);
+
+	if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
+	    (sk->sk_type != SOCK_DGRAM))
+		goto out;
+
+	if (sk->sk_state != TCP_LISTEN) {
+		sk->sk_max_ack_backlog = backlog;
+		sk->sk_state           = TCP_LISTEN;
+
+		err = 0;
+	}
+out:
+	release_sock(sk);
+
+	return err;
+}
+
+/*
+ * 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;
+
+	pr_debug("%s(%p)\n", __func__, self);
+
+	if (addr_len != sizeof(struct sockaddr_irda))
+		return -EINVAL;
+
+	lock_sock(sk);
+#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;
+		err = -EOPNOTSUPP;
+		if (self->pid & 0x80) {
+			pr_debug("%s(), extension in PID not supp!\n",
+				 __func__);
+			goto out;
+		}
+		err = irda_open_lsap(self, self->pid);
+		if (err < 0)
+			goto out;
+
+		/* Pretend we are connected */
+		sock->state = SS_CONNECTED;
+		sk->sk_state   = TCP_ESTABLISHED;
+		err = 0;
+
+		goto out;
+	}
+#endif /* CONFIG_IRDA_ULTRA */
+
+	self->ias_obj = irias_new_object(addr->sir_name, jiffies);
+	err = -ENOMEM;
+	if (self->ias_obj == NULL)
+		goto out;
+
+	err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
+	if (err < 0) {
+		irias_delete_object(self->ias_obj);
+		self->ias_obj = NULL;
+		goto out;
+	}
+
+	/*  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);
+
+	err = 0;
+out:
+	release_sock(sk);
+	return err;
+}
+
+/*
+ * 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;
+	struct sk_buff *skb;
+	int err;
+
+	err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
+	if (err)
+		return err;
+
+	err = -EINVAL;
+
+	lock_sock(sk);
+	if (sock->state != SS_UNCONNECTED)
+		goto out;
+
+	if ((sk = sock->sk) == NULL)
+		goto out;
+
+	err = -EOPNOTSUPP;
+	if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
+	    (sk->sk_type != SOCK_DGRAM))
+		goto out;
+
+	err = -EINVAL;
+	if (sk->sk_state != TCP_LISTEN)
+		goto out;
+
+	/*
+	 *	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
+	 */
+	while (1) {
+		skb = skb_dequeue(&sk->sk_receive_queue);
+		if (skb)
+			break;
+
+		/* Non blocking operation */
+		err = -EWOULDBLOCK;
+		if (flags & O_NONBLOCK)
+			goto out;
+
+		err = wait_event_interruptible(*(sk_sleep(sk)),
+					skb_peek(&sk->sk_receive_queue));
+		if (err)
+			goto out;
+	}
+
+	newsk = newsock->sk;
+	err = -EIO;
+	if (newsk == NULL)
+		goto out;
+
+	newsk->sk_state = TCP_ESTABLISHED;
+
+	new = irda_sk(newsk);
+
+	/* Now attach up the new socket */
+	new->tsap = irttp_dup(self->tsap, new);
+	err = -EPERM; /* value does not seem to make sense. -arnd */
+	if (!new->tsap) {
+		pr_debug("%s(), dup failed!\n", __func__);
+		kfree_skb(skb);
+		goto out;
+	}
+
+	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);
+
+	kfree_skb(skb);
+	sk->sk_ack_backlog--;
+
+	newsock->state = SS_CONNECTED;
+
+	irda_connect_response(new);
+	err = 0;
+out:
+	release_sock(sk);
+	return err;
+}
+
+/*
+ * 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).
+ * Because of this service name resolution, we can offer "auto-connect",
+ * 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;
+
+	pr_debug("%s(%p)\n", __func__, self);
+
+	lock_sock(sk);
+	/* Don't allow connect for Ultra sockets */
+	err = -ESOCKTNOSUPPORT;
+	if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
+		goto out;
+
+	if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
+		sock->state = SS_CONNECTED;
+		err = 0;
+		goto out;   /* Connect completed during a ERESTARTSYS event */
+	}
+
+	if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
+		sock->state = SS_UNCONNECTED;
+		err = -ECONNREFUSED;
+		goto out;
+	}
+
+	err = -EISCONN;      /* No reconnect on a seqpacket socket */
+	if (sk->sk_state == TCP_ESTABLISHED)
+		goto out;
+
+	sk->sk_state   = TCP_CLOSE;
+	sock->state = SS_UNCONNECTED;
+
+	err = -EINVAL;
+	if (addr_len != sizeof(struct sockaddr_irda))
+		goto out;
+
+	/* 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) {
+			pr_debug("%s(), auto-connect failed!\n", __func__);
+			goto out;
+		}
+	} else {
+		/* Use the one provided by the user */
+		self->daddr = addr->sir_addr;
+		pr_debug("%s(), daddr = %08x\n", __func__, self->daddr);
+
+		/* 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) {
+				pr_debug("%s(), connect failed!\n", __func__);
+				goto out;
+			}
+		} 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 */
+	if (!self->tsap)
+		irda_open_tsap(self, LSAP_ANY, addr->sir_name);
+
+	/* 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) {
+		pr_debug("%s(), connect failed!\n", __func__);
+		goto out;
+	}
+
+	/* Now the loop */
+	err = -EINPROGRESS;
+	if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
+		goto out;
+
+	err = -ERESTARTSYS;
+	if (wait_event_interruptible(*(sk_sleep(sk)),
+				     (sk->sk_state != TCP_SYN_SENT)))
+		goto out;
+
+	if (sk->sk_state != TCP_ESTABLISHED) {
+		sock->state = SS_UNCONNECTED;
+		err = sock_error(sk);
+		if (!err)
+			err = -ECONNRESET;
+		goto out;
+	}
+
+	sock->state = SS_CONNECTED;
+
+	/* At this point, IrLMP has assigned our source address */
+	self->saddr = irttp_get_saddr(self->tsap);
+	err = 0;
+out:
+	release_sock(sk);
+	return err;
+}
+
+static struct proto irda_proto = {
+	.name	  = "IRDA",
+	.owner	  = THIS_MODULE,
+	.obj_size = sizeof(struct irda_sock),
+};
+
+/*
+ * Function irda_create (sock, protocol)
+ *
+ *    Create IrDA socket
+ *
+ */
+static int irda_create(struct net *net, struct socket *sock, int protocol,
+		       int kern)
+{
+	struct sock *sk;
+	struct irda_sock *self;
+
+	if (net != &init_net)
+		return -EAFNOSUPPORT;
+
+	/* 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 */
+	sk = sk_alloc(net, PF_IRDA, GFP_KERNEL, &irda_proto);
+	if (sk == NULL)
+		return -ENOMEM;
+
+	self = irda_sk(sk);
+	pr_debug("%s() : self is %p\n", __func__, self);
+
+	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:
+			sk_free(sk);
+			return -ESOCKTNOSUPPORT;
+		}
+		break;
+	default:
+		sk_free(sk);
+		return -ESOCKTNOSUPPORT;
+	}
+
+	/* 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;
+
+	/* 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)
+{
+	pr_debug("%s(%p)\n", __func__, self);
+
+	/* 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;
+
+	if (sk == NULL)
+		return 0;
+
+	lock_sock(sk);
+	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;
+	release_sock(sk);
+
+	/* 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
+	 */
+
+	return 0;
+}
+
+/*
+ * Function irda_sendmsg (sock, msg, len)
+ *
+ *    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
+ */
+static int irda_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
+{
+	struct sock *sk = sock->sk;
+	struct irda_sock *self;
+	struct sk_buff *skb;
+	int err = -EPIPE;
+
+	pr_debug("%s(), len=%zd\n", __func__, len);
+
+	/* Note : socket.c set MSG_EOR on SEQPACKET sockets */
+	if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
+			       MSG_NOSIGNAL)) {
+		return -EINVAL;
+	}
+
+	lock_sock(sk);
+
+	if (sk->sk_shutdown & SEND_SHUTDOWN)
+		goto out_err;
+
+	if (sk->sk_state != TCP_ESTABLISHED) {
+		err = -ENOTCONN;
+		goto out;
+	}
+
+	self = irda_sk(sk);
+
+	/* Check if IrTTP is wants us to slow down */
+
+	if (wait_event_interruptible(*(sk_sleep(sk)),
+	    (self->tx_flow != FLOW_STOP  ||  sk->sk_state != TCP_ESTABLISHED))) {
+		err = -ERESTARTSYS;
+		goto out;
+	}
+
+	/* Check if we are still connected */
+	if (sk->sk_state != TCP_ESTABLISHED) {
+		err = -ENOTCONN;
+		goto out;
+	}
+
+	/* Check that we don't send out too big frames */
+	if (len > self->max_data_size) {
+		pr_debug("%s(), Chopping frame from %zd to %d bytes!\n",
+			 __func__, len, self->max_data_size);
+		len = self->max_data_size;
+	}
+
+	skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
+				  msg->msg_flags & MSG_DONTWAIT, &err);
+	if (!skb)
+		goto out_err;
+
+	skb_reserve(skb, self->max_header_size + 16);
+	skb_reset_transport_header(skb);
+	skb_put(skb, len);
+	err = memcpy_from_msg(skb_transport_header(skb), msg, len);
+	if (err) {
+		kfree_skb(skb);
+		goto out_err;
+	}
+
+	/*
+	 * 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) {
+		pr_debug("%s(), err=%d\n", __func__, err);
+		goto out_err;
+	}
+
+	release_sock(sk);
+	/* Tell client how much data we actually sent */
+	return len;
+
+out_err:
+	err = sk_stream_error(sk, msg->msg_flags, err);
+out:
+	release_sock(sk);
+	return err;
+
+}
+
+/*
+ * Function irda_recvmsg_dgram (sock, msg, size, flags)
+ *
+ *    Try to receive message and copy it to user. The frame is discarded
+ *    after being read, regardless of how much the user actually read
+ */
+static int irda_recvmsg_dgram(struct socket *sock, struct msghdr *msg,
+			      size_t size, int flags)
+{
+	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)
+		return err;
+
+	skb_reset_transport_header(skb);
+	copied = skb->len;
+
+	if (copied > size) {
+		pr_debug("%s(), Received truncated frame (%zd < %zd)!\n",
+			 __func__, copied, size);
+		copied = size;
+		msg->msg_flags |= MSG_TRUNC;
+	}
+	skb_copy_datagram_msg(skb, 0, msg, copied);
+
+	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) {
+			pr_debug("%s(), Starting IrTTP\n", __func__);
+			self->rx_flow = FLOW_START;
+			irttp_flow_request(self->tsap, FLOW_START);
+		}
+	}
+
+	return copied;
+}
+
+/*
+ * Function irda_recvmsg_stream (sock, msg, size, flags)
+ */
+static int irda_recvmsg_stream(struct socket *sock, struct msghdr *msg,
+			       size_t size, int flags)
+{
+	struct sock *sk = sock->sk;
+	struct irda_sock *self = irda_sk(sk);
+	int noblock = flags & MSG_DONTWAIT;
+	size_t copied = 0;
+	int target, err;
+	long timeo;
+
+	if ((err = sock_error(sk)) < 0)
+		return err;
+
+	if (sock->flags & __SO_ACCEPTCON)
+		return -EINVAL;
+
+	err =-EOPNOTSUPP;
+	if (flags & MSG_OOB)
+		return -EOPNOTSUPP;
+
+	err = 0;
+	target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
+	timeo = sock_rcvtimeo(sk, noblock);
+
+	do {
+		int chunk;
+		struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
+
+		if (skb == NULL) {
+			DEFINE_WAIT(wait);
+			err = 0;
+
+			if (copied >= target)
+				break;
+
+			prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
+
+			/*
+			 *	POSIX 1003.1g mandates this order.
+			 */
+			err = sock_error(sk);
+			if (err)
+				;
+			else if (sk->sk_shutdown & RCV_SHUTDOWN)
+				;
+			else if (noblock)
+				err = -EAGAIN;
+			else if (signal_pending(current))
+				err = sock_intr_errno(timeo);
+			else if (sk->sk_state != TCP_ESTABLISHED)
+				err = -ENOTCONN;
+			else if (skb_peek(&sk->sk_receive_queue) == NULL)
+				/* Wait process until data arrives */
+				schedule();
+
+			finish_wait(sk_sleep(sk), &wait);
+
+			if (err)
+				return err;
+			if (sk->sk_shutdown & RCV_SHUTDOWN)
+				break;
+
+			continue;
+		}
+
+		chunk = min_t(unsigned int, skb->len, size);
+		if (memcpy_to_msg(msg, skb->data, chunk)) {
+			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) {
+				pr_debug("%s(), back on q!\n",
+					 __func__);
+				skb_queue_head(&sk->sk_receive_queue, skb);
+				break;
+			}
+
+			kfree_skb(skb);
+		} else {
+			pr_debug("%s() questionable!?\n", __func__);
+
+			/* 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) {
+			pr_debug("%s(), Starting IrTTP\n", __func__);
+			self->rx_flow = FLOW_START;
+			irttp_flow_request(self->tsap, FLOW_START);
+		}
+	}
+
+	return copied;
+}
+
+/*
+ * Function irda_sendmsg_dgram (sock, msg, len)
+ *
+ *    Send message down to TinyTP for the unreliable sequenced
+ *    packet service...
+ *
+ */
+static int irda_sendmsg_dgram(struct socket *sock, struct msghdr *msg,
+			      size_t len)
+{
+	struct sock *sk = sock->sk;
+	struct irda_sock *self;
+	struct sk_buff *skb;
+	int err;
+
+	pr_debug("%s(), len=%zd\n", __func__, len);
+
+	if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
+		return -EINVAL;
+
+	lock_sock(sk);
+
+	if (sk->sk_shutdown & SEND_SHUTDOWN) {
+		send_sig(SIGPIPE, current, 0);
+		err = -EPIPE;
+		goto out;
+	}
+
+	err = -ENOTCONN;
+	if (sk->sk_state != TCP_ESTABLISHED)
+		goto out;
+
+	self = irda_sk(sk);
+
+	/*
+	 * Check that we don't send out too big frames. This is an unreliable
+	 * service, so we have no fragmentation and no coalescence
+	 */
+	if (len > self->max_data_size) {
+		pr_debug("%s(), Warning too much data! Chopping frame from %zd to %d bytes!\n",
+			 __func__, len, self->max_data_size);
+		len = self->max_data_size;
+	}
+
+	skb = sock_alloc_send_skb(sk, len + self->max_header_size,
+				  msg->msg_flags & MSG_DONTWAIT, &err);
+	err = -ENOBUFS;
+	if (!skb)
+		goto out;
+
+	skb_reserve(skb, self->max_header_size);
+	skb_reset_transport_header(skb);
+
+	pr_debug("%s(), appending user data\n", __func__);
+	skb_put(skb, len);
+	err = memcpy_from_msg(skb_transport_header(skb), msg, len);
+	if (err) {
+		kfree_skb(skb);
+		goto out;
+	}
+
+	/*
+	 * 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) {
+		pr_debug("%s(), err=%d\n", __func__, err);
+		goto out;
+	}
+
+	release_sock(sk);
+	return len;
+
+out:
+	release_sock(sk);
+	return err;
+}
+
+/*
+ * Function irda_sendmsg_ultra (sock, msg, len)
+ *
+ *    Send message down to IrLMP for the unreliable Ultra
+ *    packet service...
+ */
+#ifdef CONFIG_IRDA_ULTRA
+static int irda_sendmsg_ultra(struct socket *sock, struct msghdr *msg,
+			      size_t len)
+{
+	struct sock *sk = sock->sk;
+	struct irda_sock *self;
+	__u8 pid = 0;
+	int bound = 0;
+	struct sk_buff *skb;
+	int err;
+
+	pr_debug("%s(), len=%zd\n", __func__, len);
+
+	err = -EINVAL;
+	if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
+		return -EINVAL;
+
+	lock_sock(sk);
+
+	err = -EPIPE;
+	if (sk->sk_shutdown & SEND_SHUTDOWN) {
+		send_sig(SIGPIPE, current, 0);
+		goto out;
+	}
+
+	self = irda_sk(sk);
+
+	/* Check if an address was specified with sendto. Jean II */
+	if (msg->msg_name) {
+		DECLARE_SOCKADDR(struct sockaddr_irda *, addr, msg->msg_name);
+		err = -EINVAL;
+		/* Check address, extract pid. Jean II */
+		if (msg->msg_namelen < sizeof(*addr))
+			goto out;
+		if (addr->sir_family != AF_IRDA)
+			goto out;
+
+		pid = addr->sir_lsap_sel;
+		if (pid & 0x80) {
+			pr_debug("%s(), extension in PID not supp!\n",
+				 __func__);
+			err = -EOPNOTSUPP;
+			goto out;
+		}
+	} else {
+		/* Check that the socket is properly bound to an Ultra
+		 * port. Jean II */
+		if ((self->lsap == NULL) ||
+		    (sk->sk_state != TCP_ESTABLISHED)) {
+			pr_debug("%s(), socket not bound to Ultra PID.\n",
+				 __func__);
+			err = -ENOTCONN;
+			goto out;
+		}
+		/* Use PID from socket */
+		bound = 1;
+	}
+
+	/*
+	 * Check that we don't send out too big frames. This is an unreliable
+	 * service, so we have no fragmentation and no coalescence
+	 */
+	if (len > self->max_data_size) {
+		pr_debug("%s(), Warning too much data! Chopping frame from %zd to %d bytes!\n",
+			 __func__, len, self->max_data_size);
+		len = self->max_data_size;
+	}
+
+	skb = sock_alloc_send_skb(sk, len + self->max_header_size,
+				  msg->msg_flags & MSG_DONTWAIT, &err);
+	err = -ENOBUFS;
+	if (!skb)
+		goto out;
+
+	skb_reserve(skb, self->max_header_size);
+	skb_reset_transport_header(skb);
+
+	pr_debug("%s(), appending user data\n", __func__);
+	skb_put(skb, len);
+	err = memcpy_from_msg(skb_transport_header(skb), msg, len);
+	if (err) {
+		kfree_skb(skb);
+		goto out;
+	}
+
+	err = irlmp_connless_data_request((bound ? self->lsap : NULL),
+					  skb, pid);
+	if (err)
+		pr_debug("%s(), err=%d\n", __func__, err);
+out:
+	release_sock(sk);
+	return err ? : len;
+}
+#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);
+
+	pr_debug("%s(%p)\n", __func__, self);
+
+	lock_sock(sk);
+
+	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 */
+
+	release_sock(sk);
+
+	return 0;
+}
+
+/*
+ * 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;
+
+	poll_wait(file, sk_sleep(sk), wait);
+	mask = 0;
+
+	/* Exceptional events? */
+	if (sk->sk_err)
+		mask |= POLLERR;
+	if (sk->sk_shutdown & RCV_SHUTDOWN) {
+		pr_debug("%s(), POLLHUP\n", __func__);
+		mask |= POLLHUP;
+	}
+
+	/* Readable? */
+	if (!skb_queue_empty(&sk->sk_receive_queue)) {
+		pr_debug("Socket is readable\n");
+		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) {
+			pr_debug("%s(), POLLHUP\n", __func__);
+			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;
+	}
+
+	return mask;
+}
+
+/*
+ * Function irda_ioctl (sock, cmd, arg)
+ */
+static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+	struct sock *sk = sock->sk;
+	int err;
+
+	pr_debug("%s(), cmd=%#x\n", __func__, cmd);
+
+	err = -EINVAL;
+	switch (cmd) {
+	case TIOCOUTQ: {
+		long amount;
+
+		amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
+		if (amount < 0)
+			amount = 0;
+		err = put_user(amount, (unsigned int __user *)arg);
+		break;
+	}
+
+	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;
+		err = put_user(amount, (unsigned int __user *)arg);
+		break;
+	}
+
+	case SIOCGSTAMP:
+		if (sk != NULL)
+			err = sock_get_timestamp(sk, (struct timeval __user *)arg);
+		break;
+
+	case SIOCGIFADDR:
+	case SIOCSIFADDR:
+	case SIOCGIFDSTADDR:
+	case SIOCSIFDSTADDR:
+	case SIOCGIFBRDADDR:
+	case SIOCSIFBRDADDR:
+	case SIOCGIFNETMASK:
+	case SIOCSIFNETMASK:
+	case SIOCGIFMETRIC:
+	case SIOCSIFMETRIC:
+		break;
+	default:
+		pr_debug("%s(), doing device ioctl!\n", __func__);
+		err = -ENOIOCTLCMD;
+	}
+
+	return err;
+}
+
+#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
+
+/*
+ * Function irda_setsockopt (sock, level, optname, optval, optlen)
+ *
+ *    Set some options for the socket
+ *
+ */
+static int irda_setsockopt(struct socket *sock, int level, int optname,
+			   char __user *optval, unsigned int optlen)
+{
+	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 */
+	int opt, free_ias = 0, err = 0;
+
+	pr_debug("%s(%p)\n", __func__, self);
+
+	if (level != SOL_IRLMP)
+		return -ENOPROTOOPT;
+
+	lock_sock(sk);
+
+	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...
+		 */
+
+		if (optlen != sizeof(struct irda_ias_set)) {
+			err = -EINVAL;
+			goto out;
+		}
+
+		ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
+		if (ias_opt == NULL) {
+			err = -ENOMEM;
+			goto out;
+		}
+
+		/* Copy query to the driver. */
+		if (copy_from_user(ias_opt, optval, optlen)) {
+			kfree(ias_opt);
+			err = -EFAULT;
+			goto out;
+		}
+
+		/* 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);
+				err = -EINVAL;
+				goto out;
+			}
+			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);
+			err = -EPERM;
+			goto out;
+		}
+
+		/* 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);
+			if (ias_obj == NULL) {
+				kfree(ias_opt);
+				err = -ENOMEM;
+				goto out;
+			}
+			free_ias = 1;
+		}
+
+		/* Do we have the attribute already ? */
+		if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
+			kfree(ias_opt);
+			if (free_ias) {
+				kfree(ias_obj->name);
+				kfree(ias_obj);
+			}
+			err = -EINVAL;
+			goto out;
+		}
+
+		/* 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);
+				if (free_ias) {
+					kfree(ias_obj->name);
+					kfree(ias_obj);
+				}
+
+				err = -EINVAL;
+				goto out;
+			}
+			/* 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);
+			if (free_ias) {
+				kfree(ias_obj->name);
+				kfree(ias_obj);
+			}
+			err = -EINVAL;
+			goto out;
+		}
+		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.
+		 */
+
+		if (optlen != sizeof(struct irda_ias_set)) {
+			err = -EINVAL;
+			goto out;
+		}
+
+		ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
+		if (ias_opt == NULL) {
+			err = -ENOMEM;
+			goto out;
+		}
+
+		/* Copy query to the driver. */
+		if (copy_from_user(ias_opt, optval, optlen)) {
+			kfree(ias_opt);
+			err = -EFAULT;
+			goto out;
+		}
+
+		/* 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);
+			err = -EINVAL;
+			goto out;
+		}
+
+		/* 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);
+			err = -EPERM;
+			goto out;
+		}
+
+		/* 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);
+			err = -EINVAL;
+			goto out;
+		}
+
+		/* Check is the user space own the object */
+		if(ias_attr->value->owner != IAS_USER_ATTR) {
+			pr_debug("%s(), attempting to delete a kernel attribute\n",
+				 __func__);
+			kfree(ias_opt);
+			err = -EPERM;
+			goto out;
+		}
+
+		/* Remove the attribute (and maybe the object) */
+		irias_delete_attrib(ias_obj, ias_attr, 1);
+		kfree(ias_opt);
+		break;
+	case IRLMP_MAX_SDU_SIZE:
+		if (optlen < sizeof(int)) {
+			err = -EINVAL;
+			goto out;
+		}
+
+		if (get_user(opt, (int __user *)optval)) {
+			err = -EFAULT;
+			goto out;
+		}
+
+		/* Only possible for a seqpacket service (TTP with SAR) */
+		if (sk->sk_type != SOCK_SEQPACKET) {
+			pr_debug("%s(), setting max_sdu_size = %d\n",
+				 __func__, opt);
+			self->max_sdu_size_rx = opt;
+		} else {
+			net_warn_ratelimited("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
+					     __func__);
+			err = -ENOPROTOOPT;
+			goto out;
+		}
+		break;
+	case IRLMP_HINTS_SET:
+		if (optlen < sizeof(int)) {
+			err = -EINVAL;
+			goto out;
+		}
+
+		/* The input is really a (__u8 hints[2]), easier as an int */
+		if (get_user(opt, (int __user *)optval)) {
+			err = -EFAULT;
+			goto out;
+		}
+
+		/* Unregister any old registration */
+		if (self->skey)
+			irlmp_unregister_service(self->skey);
+
+		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).
+		 */
+		if (optlen < sizeof(int)) {
+			err = -EINVAL;
+			goto out;
+		}
+
+		/* The input is really a (__u8 hints[2]), easier as an int */
+		if (get_user(opt, (int __user *)optval)) {
+			err = -EFAULT;
+			goto out;
+		}
+
+		/* 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:
+		err = -ENOPROTOOPT;
+		break;
+	}
+
+out:
+	release_sock(sk);
+
+	return err;
+}
+
+/*
+ * 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)
+ */
+static int irda_getsockopt(struct socket *sock, int level, int optname,
+			   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;
+	int err = 0;
+	int offset, total;
+
+	pr_debug("%s(%p)\n", __func__, self);
+
+	if (level != SOL_IRLMP)
+		return -ENOPROTOOPT;
+
+	if (get_user(len, optlen))
+		return -EFAULT;
+
+	if(len < 0)
+		return -EINVAL;
+
+	lock_sock(sk);
+
+	switch (optname) {
+	case IRLMP_ENUMDEVICES:
+
+		/* Offset to first device entry */
+		offset = sizeof(struct irda_device_list) -
+			sizeof(struct irda_device_info);
+
+		if (len < offset) {
+			err = -EINVAL;
+			goto out;
+		}
+
+		/* 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 */
+		if (discoveries == NULL) {
+			err = -EAGAIN;
+			goto out;		/* Didn't find any devices */
+		}
+
+		/* Write total list length back to client */
+		if (copy_to_user(optval, &list, offset))
+			err = -EFAULT;
+
+		/* Copy the list itself - watch for overflow */
+		if (list.len > 2048) {
+			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);
+		if (put_user(len, optlen)) {
+			err = -EFAULT;
+			goto out;
+		}
+
+		if (copy_to_user(optval, &val, len)) {
+			err = -EFAULT;
+			goto out;
+		}
+
+		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 */
+		if (len != sizeof(struct irda_ias_set)) {
+			err = -EINVAL;
+			goto out;
+		}
+
+		ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
+		if (ias_opt == NULL) {
+			err = -ENOMEM;
+			goto out;
+		}
+
+		/* Copy query to the driver. */
+		if (copy_from_user(ias_opt, optval, len)) {
+			kfree(ias_opt);
+			err = -EFAULT;
+			goto out;
+		}
+
+		/* 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);
+			err = -EINVAL;
+			goto out;
+		}
+
+		/* 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);
+			err = -EINVAL;
+			goto out;
+		}
+
+		/* Translate from internal to user structure */
+		err = irda_extract_ias_value(ias_opt, ias_attr->value);
+		if(err) {
+			kfree(ias_opt);
+			goto out;
+		}
+
+		/* Copy reply to the user */
+		if (copy_to_user(optval, ias_opt,
+				 sizeof(struct irda_ias_set))) {
+			kfree(ias_opt);
+			err = -EFAULT;
+			goto out;
+		}
+		/* 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 */
+		if (len != sizeof(struct irda_ias_set)) {
+			err = -EINVAL;
+			goto out;
+		}
+
+		ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
+		if (ias_opt == NULL) {
+			err = -ENOMEM;
+			goto out;
+		}
+
+		/* Copy query to the driver. */
+		if (copy_from_user(ias_opt, optval, len)) {
+			kfree(ias_opt);
+			err = -EFAULT;
+			goto out;
+		}
+
+		/* 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);
+				err = -EINVAL;
+				goto out;
+			}
+		}
+
+		/* Check that we can proceed with IAP */
+		if (self->iriap) {
+			net_warn_ratelimited("%s: busy with a previous query\n",
+					     __func__);
+			kfree(ias_opt);
+			err = -EBUSY;
+			goto out;
+		}
+
+		self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
+					 irda_getvalue_confirm);
+
+		if (self->iriap == NULL) {
+			kfree(ias_opt);
+			err = -ENOMEM;
+			goto out;
+		}
+
+		/* 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 */
+			err = -EHOSTUNREACH;
+			goto out;
+		}
+
+		/* 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))
+				err = -EADDRNOTAVAIL;
+			else
+				err = -EHOSTUNREACH;
+
+			goto out;
+		}
+
+		/* 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);
+			goto out;
+		}
+
+		/* Copy reply to the user */
+		if (copy_to_user(optval, ias_opt,
+				 sizeof(struct irda_ias_set))) {
+			kfree(ias_opt);
+			err = -EFAULT;
+			goto out;
+		}
+		/* 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 */
+		if (len != sizeof(int)) {
+			err = -EINVAL;
+			goto out;
+		}
+		/* Get timeout in ms (max time we block the caller) */
+		if (get_user(val, (int __user *)optval)) {
+			err = -EFAULT;
+			goto out;
+		}
+
+		/* 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) {
+			pr_debug("%s(), nothing discovered yet, going to sleep...\n",
+				 __func__);
+
+			/* Set watchdog timer to expire in <val> ms. */
+			self->errno = 0;
+			setup_timer(&self->watchdog, irda_discovery_timeout,
+					(unsigned long)self);
+			mod_timer(&self->watchdog,
+				  jiffies + msecs_to_jiffies(val));
+
+			/* Wait for IR-LMP to call us back */
+			err = __wait_event_interruptible(self->query_wait,
+			      (self->cachedaddr != 0 || self->errno == -ETIME));
+
+			/* If watchdog is still activated, kill it! */
+			del_timer(&(self->watchdog));
+
+			pr_debug("%s(), ...waking up !\n", __func__);
+
+			if (err != 0)
+				goto out;
+		}
+		else
+			pr_debug("%s(), found immediately !\n",
+				 __func__);
+
+		/* 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 */
+		if (!self->cachedaddr) {
+			err = -EAGAIN;		/* Didn't find any devices */
+			goto out;
+		}
+		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...
+		 */
+		if (put_user(daddr, (int __user *)optval)) {
+			err = -EFAULT;
+			goto out;
+		}
+
+		break;
+	default:
+		err = -ENOPROTOOPT;
+	}
+
+out:
+
+	release_sock(sk);
+
+	return err;
+}
+
+static const struct net_proto_family irda_family_ops = {
+	.family = PF_IRDA,
+	.create = irda_create,
+	.owner	= THIS_MODULE,
+};
+
+static const struct proto_ops irda_stream_ops = {
+	.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,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl =	irda_compat_ioctl,
+#endif
+	.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,
+};
+
+static const struct proto_ops irda_seqpacket_ops = {
+	.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 =		datagram_poll,
+	.ioctl =	irda_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl =	irda_compat_ioctl,
+#endif
+	.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,
+};
+
+static const struct proto_ops irda_dgram_ops = {
+	.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 =		datagram_poll,
+	.ioctl =	irda_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl =	irda_compat_ioctl,
+#endif
+	.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
+static const struct proto_ops irda_ultra_ops = {
+	.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,
+	.poll =		datagram_poll,
+	.ioctl =	irda_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl =	irda_compat_ioctl,
+#endif
+	.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
+ *
+ */
+void irsock_cleanup(void)
+{
+	sock_unregister(PF_IRDA);
+	proto_unregister(&irda_proto);
+}