cregit-Linux how code gets into the kernel

Release 4.11 net/irda/af_irda.c

Directory: net/irda
/*********************************************************************
 *
 * 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/sched/signal.h>
#include <linux/init.h>
#include <linux/net.h>
#include <linux/irda.h>
#include <linux/poll.h>

#include <asm/ioctls.h>		/* TIOCOUTQ, TIOCINQ */
#include <linux/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;
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)7093.33%233.33%


Jean Tourrilhes22.67%116.67%


Joe Perches11.33%116.67%


Arnaldo Carvalho de Melo11.33%116.67%


Harvey Harrison11.33%116.67%


Total75100.00%6100.00%



/*
 * 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
         */
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)7550.68%426.67%


Linus Torvalds3624.32%213.33%


Jean Tourrilhes117.43%213.33%


Arnaldo Carvalho de Melo106.76%320.00%


Olaf Kirch106.76%16.67%


Harvey Harrison21.35%16.67%


Joe Perches21.35%16.67%


James Morris21.35%16.67%


Total148100.00%15100.00%



/*
 * 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);
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)17281.90%637.50%


Jean Tourrilhes167.62%318.75%


Linus Torvalds52.38%16.25%


Arnaldo Carvalho de Melo52.38%212.50%


Joe Perches41.90%212.50%


Martin Dalecki41.90%16.25%


Harvey Harrison41.90%16.25%


Total210100.00%16100.00%



/*
 * 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);
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)17580.65%637.50%


Jean Tourrilhes219.68%318.75%


Linus Torvalds52.30%16.25%


Harvey Harrison41.84%16.25%


Arnaldo Carvalho de Melo41.84%212.50%


Joe Perches41.84%212.50%


Martin Dalecki41.84%16.25%


Total217100.00%16100.00%



/*
 * 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);
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)5382.81%436.36%


Samuel Ortiz57.81%218.18%


Jean Tourrilhes23.12%19.09%


Adrian Bunk11.56%19.09%


Joe Perches11.56%19.09%


Mathias Krause11.56%19.09%


Harvey Harrison11.56%19.09%


Total64100.00%11100.00%



/*
 * 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;
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)8479.25%330.00%


Jean Tourrilhes65.66%110.00%


Samuel Ortiz54.72%110.00%


Eric Dumazet32.83%110.00%


Harvey Harrison32.83%110.00%


Joe Perches32.83%110.00%


Arnaldo Carvalho de Melo21.89%220.00%


Total106100.00%10100.00%



/*
 * 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);
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)10886.40%753.85%


Linus Torvalds54.00%17.69%


Jean Tourrilhes43.20%17.69%


Harvey Harrison32.40%17.69%


Joe Perches32.40%215.38%


Martin Dalecki21.60%17.69%


Total125100.00%13100.00%



/*
 * 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);
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)4881.36%337.50%


Jean Tourrilhes711.86%225.00%


Martin Dalecki23.39%112.50%


Harvey Harrison11.69%112.50%


Joe Perches11.69%112.50%


Total59100.00%8100.00%



/*
 * 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);
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)5288.14%250.00%


Samuel Ortiz58.47%125.00%


Jean Tourrilhes23.39%125.00%


Total59100.00%4100.00%



/*
 * 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;
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)14194.63%342.86%


Joe Perches21.34%114.29%


Martin Dalecki21.34%114.29%


Harvey Harrison21.34%114.29%


Jean Tourrilhes21.34%114.29%


Total149100.00%7100.00%



/*
 * 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;
}

Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)9692.31%342.86%


Jeff Garzik43.85%114.29%


Joe Perches21.92%228.57%


Harvey Harrison21.92%114.29%


Total104100.00%7100.00%



#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;
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)21682.13%541.67%


Jean Tourrilhes176.46%18.33%


Linus Torvalds145.32%18.33%


Jeff Garzik72.66%18.33%


Harvey Harrison41.52%18.33%


Joe Perches41.52%216.67%


Martin Dalecki10.38%18.33%


Total263100.00%12100.00%



/*
 * 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;
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)26389.15%333.33%


Jeff Garzik124.07%111.11%


Harvey Harrison62.03%111.11%


Joe Perches62.03%111.11%


Linus Torvalds41.36%111.11%


Jean Tourrilhes31.02%111.11%


Martin Dalecki10.34%111.11%


Total295100.00%9100.00%



/*
 * 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;
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)13981.76%327.27%


Eric Dumazet137.65%19.09%


Samuel Ortiz52.94%19.09%


Jeff Garzik42.35%19.09%


David S. Miller31.76%19.09%


Joe Perches21.18%19.09%


Harvey Harrison21.18%19.09%


Arnd Bergmann10.59%19.09%


Arnaldo Carvalho de Melo10.59%19.09%


Total170100.00%11100.00%



/*
 * 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 (