[net-next-2.6.git] / net / irda / ircomm / ircomm_core.c

/*********************************************************************
 *
 * Filename:      ircomm_core.c
 * Version:       1.0
 * Description:   IrCOMM service interface
 * Status:        Experimental.
 * Author:        Dag Brattli <dagb@cs.uit.no>
 * Created at:    Sun Jun  6 20:37:34 1999
 * Modified at:   Tue Dec 21 13:26:41 1999
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 *
 *     Copyright (c) 1999 Dag Brattli, All Rights Reserved.
 *     Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
 *
 *     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, write to the Free Software
 *     Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *     MA 02111-1307 USA
 *
 ********************************************************************/

#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>

#include <net/irda/irda.h>
#include <net/irda/irmod.h>
#include <net/irda/irlmp.h>
#include <net/irda/iriap.h>
#include <net/irda/irttp.h>
#include <net/irda/irias_object.h>

#include <net/irda/ircomm_event.h>
#include <net/irda/ircomm_lmp.h>
#include <net/irda/ircomm_ttp.h>
#include <net/irda/ircomm_param.h>
#include <net/irda/ircomm_core.h>

static int __ircomm_close(struct ircomm_cb *self);
static void ircomm_control_indication(struct ircomm_cb *self,
				      struct sk_buff *skb, int clen);

#ifdef CONFIG_PROC_FS
extern struct proc_dir_entry *proc_irda;
static int ircomm_seq_open(struct inode *, struct file *);

static const struct file_operations ircomm_proc_fops = {
	.owner		= THIS_MODULE,
	.open           = ircomm_seq_open,
	.read           = seq_read,
	.llseek         = seq_lseek,
	.release	= seq_release,
};
#endif /* CONFIG_PROC_FS */

hashbin_t *ircomm = NULL;

static int __init ircomm_init(void)
{
	ircomm = hashbin_new(HB_LOCK);
	if (ircomm == NULL) {
		IRDA_ERROR("%s(), can't allocate hashbin!\n", __FUNCTION__);
		return -ENOMEM;
	}

#ifdef CONFIG_PROC_FS
	{ struct proc_dir_entry *ent;
	ent = create_proc_entry("ircomm", 0, proc_irda);
	if (ent)
		ent->proc_fops = &ircomm_proc_fops;
	}
#endif /* CONFIG_PROC_FS */

	IRDA_MESSAGE("IrCOMM protocol (Dag Brattli)\n");

	return 0;
}

static void __exit ircomm_cleanup(void)
{
	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	hashbin_delete(ircomm, (FREE_FUNC) __ircomm_close);

#ifdef CONFIG_PROC_FS
	remove_proc_entry("ircomm", proc_irda);
#endif /* CONFIG_PROC_FS */
}

/*
 * Function ircomm_open (client_notify)
 *
 *    Start a new IrCOMM instance
 *
 */
struct ircomm_cb *ircomm_open(notify_t *notify, __u8 service_type, int line)
{
	struct ircomm_cb *self = NULL;
	int ret;

	IRDA_DEBUG(2, "%s(), service_type=0x%02x\n", __FUNCTION__ ,
		   service_type);

	IRDA_ASSERT(ircomm != NULL, return NULL;);

	self = kzalloc(sizeof(struct ircomm_cb), GFP_ATOMIC);
	if (self == NULL)
		return NULL;

	self->notify = *notify;
	self->magic = IRCOMM_MAGIC;

	/* Check if we should use IrLMP or IrTTP */
	if (service_type & IRCOMM_3_WIRE_RAW) {
		self->flow_status = FLOW_START;
		ret = ircomm_open_lsap(self);
	} else
		ret = ircomm_open_tsap(self);

	if (ret < 0) {
		kfree(self);
		return NULL;
	}

	self->service_type = service_type;
	self->line = line;

	hashbin_insert(ircomm, (irda_queue_t *) self, line, NULL);

	ircomm_next_state(self, IRCOMM_IDLE);

	return self;
}

EXPORT_SYMBOL(ircomm_open);

/*
 * Function ircomm_close_instance (self)
 *
 *    Remove IrCOMM instance
 *
 */
static int __ircomm_close(struct ircomm_cb *self)
{
	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	/* Disconnect link if any */
	ircomm_do_event(self, IRCOMM_DISCONNECT_REQUEST, NULL, NULL);

	/* Remove TSAP */
	if (self->tsap) {
		irttp_close_tsap(self->tsap);
		self->tsap = NULL;
	}

	/* Remove LSAP */
	if (self->lsap) {
		irlmp_close_lsap(self->lsap);
		self->lsap = NULL;
	}
	self->magic = 0;

	kfree(self);

	return 0;
}

/*
 * Function ircomm_close (self)
 *
 *    Closes and removes the specified IrCOMM instance
 *
 */
int ircomm_close(struct ircomm_cb *self)
{
	struct ircomm_cb *entry;

	IRDA_ASSERT(self != NULL, return -EIO;);
	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EIO;);

	IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );

	entry = hashbin_remove(ircomm, self->line, NULL);

	IRDA_ASSERT(entry == self, return -1;);

	return __ircomm_close(self);
}

EXPORT_SYMBOL(ircomm_close);

/*
 * Function ircomm_connect_request (self, service_type)
 *
 *    Impl. of this function is differ from one of the reference. This
 *    function does discovery as well as sending connect request
 *
 */
int ircomm_connect_request(struct ircomm_cb *self, __u8 dlsap_sel,
			   __u32 saddr, __u32 daddr, struct sk_buff *skb,
			   __u8 service_type)
{
	struct ircomm_info info;
	int ret;

	IRDA_DEBUG(2 , "%s()\n", __FUNCTION__ );

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);

	self->service_type= service_type;

	info.dlsap_sel = dlsap_sel;
	info.saddr = saddr;
	info.daddr = daddr;

	ret = ircomm_do_event(self, IRCOMM_CONNECT_REQUEST, skb, &info);

	return ret;
}

EXPORT_SYMBOL(ircomm_connect_request);

/*
 * Function ircomm_connect_indication (self, qos, skb)
 *
 *    Notify user layer about the incoming connection
 *
 */
void ircomm_connect_indication(struct ircomm_cb *self, struct sk_buff *skb,
			       struct ircomm_info *info)
{
	int clen = 0;

	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	/* Check if the packet contains data on the control channel */
	if (skb->len > 0)
		clen = skb->data[0];

	/*
	 * If there are any data hiding in the control channel, we must
	 * deliver it first. The side effect is that the control channel
	 * will be removed from the skb
	 */
	if (self->notify.connect_indication)
		self->notify.connect_indication(self->notify.instance, self,
						info->qos, info->max_data_size,
						info->max_header_size, skb);
	else {
		IRDA_DEBUG(0, "%s(), missing handler\n", __FUNCTION__ );
	}
}

/*
 * Function ircomm_connect_response (self, userdata, max_sdu_size)
 *
 *    User accepts connection
 *
 */
int ircomm_connect_response(struct ircomm_cb *self, struct sk_buff *userdata)
{
	int ret;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);

	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );

	ret = ircomm_do_event(self, IRCOMM_CONNECT_RESPONSE, userdata, NULL);

	return ret;
}

EXPORT_SYMBOL(ircomm_connect_response);

/*
 * Function connect_confirm (self, skb)
 *
 *    Notify user layer that the link is now connected
 *
 */
void ircomm_connect_confirm(struct ircomm_cb *self, struct sk_buff *skb,
			    struct ircomm_info *info)
{
	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );

	if (self->notify.connect_confirm )
		self->notify.connect_confirm(self->notify.instance,
					     self, info->qos,
					     info->max_data_size,
					     info->max_header_size, skb);
	else {
		IRDA_DEBUG(0, "%s(), missing handler\n", __FUNCTION__ );
	}
}

/*
 * Function ircomm_data_request (self, userdata)
 *
 *    Send IrCOMM data to peer device
 *
 */
int ircomm_data_request(struct ircomm_cb *self, struct sk_buff *skb)
{
	int ret;

	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );

	IRDA_ASSERT(self != NULL, return -EFAULT;);
	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;);
	IRDA_ASSERT(skb != NULL, return -EFAULT;);

	ret = ircomm_do_event(self, IRCOMM_DATA_REQUEST, skb, NULL);

	return ret;
}

EXPORT_SYMBOL(ircomm_data_request);

/*
 * Function ircomm_data_indication (self, skb)
 *
 *    Data arrived, so deliver it to user
 *
 */
void ircomm_data_indication(struct ircomm_cb *self, struct sk_buff *skb)
{
	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );

	IRDA_ASSERT(skb->len > 0, return;);

	if (self->notify.data_indication)
		self->notify.data_indication(self->notify.instance, self, skb);
	else {
		IRDA_DEBUG(0, "%s(), missing handler\n", __FUNCTION__ );
	}
}

/*
 * Function ircomm_process_data (self, skb)
 *
 *    Data arrived which may contain control channel data
 *
 */
void ircomm_process_data(struct ircomm_cb *self, struct sk_buff *skb)
{
	int clen;

	IRDA_ASSERT(skb->len > 0, return;);

	clen = skb->data[0];

	/*
	 * If there are any data hiding in the control channel, we must
	 * deliver it first. The side effect is that the control channel
	 * will be removed from the skb
	 */
	if (clen > 0)
		ircomm_control_indication(self, skb, clen);

	/* Remove control channel from data channel */
	skb_pull(skb, clen+1);

	if (skb->len)
		ircomm_data_indication(self, skb);
	else {
		IRDA_DEBUG(4, "%s(), data was control info only!\n",
			   __FUNCTION__ );
	}
}

/*
 * Function ircomm_control_request (self, params)
 *
 *    Send control data to peer device
 *
 */
int ircomm_control_request(struct ircomm_cb *self, struct sk_buff *skb)
{
	int ret;

	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	IRDA_ASSERT(self != NULL, return -EFAULT;);
	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;);
	IRDA_ASSERT(skb != NULL, return -EFAULT;);

	ret = ircomm_do_event(self, IRCOMM_CONTROL_REQUEST, skb, NULL);

	return ret;
}

EXPORT_SYMBOL(ircomm_control_request);

/*
 * Function ircomm_control_indication (self, skb)
 *
 *    Data has arrived on the control channel
 *
 */
static void ircomm_control_indication(struct ircomm_cb *self,
				      struct sk_buff *skb, int clen)
{
	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	/* Use udata for delivering data on the control channel */
	if (self->notify.udata_indication) {
		struct sk_buff *ctrl_skb;

		/* We don't own the skb, so clone it */
		ctrl_skb = skb_clone(skb, GFP_ATOMIC);
		if (!ctrl_skb)
			return;

		/* Remove data channel from control channel */
		skb_trim(ctrl_skb, clen+1);

		self->notify.udata_indication(self->notify.instance, self,
					      ctrl_skb);

		/* Drop reference count -
		 * see ircomm_tty_control_indication(). */
		dev_kfree_skb(ctrl_skb);
	} else {
		IRDA_DEBUG(0, "%s(), missing handler\n", __FUNCTION__ );
	}
}

/*
 * Function ircomm_disconnect_request (self, userdata, priority)
 *
 *    User layer wants to disconnect the IrCOMM connection
 *
 */
int ircomm_disconnect_request(struct ircomm_cb *self, struct sk_buff *userdata)
{
	struct ircomm_info info;
	int ret;

	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);

	ret = ircomm_do_event(self, IRCOMM_DISCONNECT_REQUEST, userdata,
			      &info);
	return ret;
}

EXPORT_SYMBOL(ircomm_disconnect_request);

/*
 * Function disconnect_indication (self, skb)
 *
 *    Tell user that the link has been disconnected
 *
 */
void ircomm_disconnect_indication(struct ircomm_cb *self, struct sk_buff *skb,
				  struct ircomm_info *info)
{
	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	IRDA_ASSERT(info != NULL, return;);

	if (self->notify.disconnect_indication) {
		self->notify.disconnect_indication(self->notify.instance, self,
						   info->reason, skb);
	} else {
		IRDA_DEBUG(0, "%s(), missing handler\n", __FUNCTION__ );
	}
}

/*
 * Function ircomm_flow_request (self, flow)
 *
 *
 *
 */
void ircomm_flow_request(struct ircomm_cb *self, LOCAL_FLOW flow)
{
	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);

	if (self->service_type == IRCOMM_3_WIRE_RAW)
		return;

	irttp_flow_request(self->tsap, flow);
}

EXPORT_SYMBOL(ircomm_flow_request);

#ifdef CONFIG_PROC_FS
static void *ircomm_seq_start(struct seq_file *seq, loff_t *pos)
{
	struct ircomm_cb *self;
	loff_t off = 0;

	spin_lock_irq(&ircomm->hb_spinlock);

	for (self = (struct ircomm_cb *) hashbin_get_first(ircomm);
	     self != NULL;
	     self = (struct ircomm_cb *) hashbin_get_next(ircomm)) {
		if (off++ == *pos)
			break;

	}
	return self;
}

static void *ircomm_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	++*pos;

	return (void *) hashbin_get_next(ircomm);
}

static void ircomm_seq_stop(struct seq_file *seq, void *v)
{
	spin_unlock_irq(&ircomm->hb_spinlock);
}

static int ircomm_seq_show(struct seq_file *seq, void *v)
{
	const struct ircomm_cb *self = v;

	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EINVAL; );

	if(self->line < 0x10)
		seq_printf(seq, "ircomm%d", self->line);
	else
		seq_printf(seq, "irlpt%d", self->line - 0x10);

	seq_printf(seq,
		   " state: %s, slsap_sel: %#02x, dlsap_sel: %#02x, mode:",
		   ircomm_state[ self->state],
		   self->slsap_sel, self->dlsap_sel);

	if(self->service_type & IRCOMM_3_WIRE_RAW)
		seq_printf(seq, " 3-wire-raw");
	if(self->service_type & IRCOMM_3_WIRE)
		seq_printf(seq, " 3-wire");
	if(self->service_type & IRCOMM_9_WIRE)
		seq_printf(seq, " 9-wire");
	if(self->service_type & IRCOMM_CENTRONICS)
		seq_printf(seq, " Centronics");
	seq_putc(seq, '\n');

	return 0;
}

static const struct seq_operations ircomm_seq_ops = {
	.start  = ircomm_seq_start,
	.next   = ircomm_seq_next,
	.stop   = ircomm_seq_stop,
	.show   = ircomm_seq_show,
};

static int ircomm_seq_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &ircomm_seq_ops);
}
#endif /* CONFIG_PROC_FS */

MODULE_AUTHOR("Dag Brattli <dag@brattli.net>");
MODULE_DESCRIPTION("IrCOMM protocol");
MODULE_LICENSE("GPL");

module_init(ircomm_init);
module_exit(ircomm_cleanup);
Commit	Line	Data
1da177e4	1	/*********************************************************************
6819bc2e	2	*
1da177e4 LT	3	* Filename: ircomm_core.c
	4	* Version: 1.0
	5	* Description: IrCOMM service interface
	6	* Status: Experimental.
	7	* Author: Dag Brattli <dagb@cs.uit.no>
	8	* Created at: Sun Jun 6 20:37:34 1999
	9	* Modified at: Tue Dec 21 13:26:41 1999
	10	* Modified by: Dag Brattli <dagb@cs.uit.no>
6819bc2e	11	*
1da177e4 LT	12	* Copyright (c) 1999 Dag Brattli, All Rights Reserved.
1da177e4 LT	13	* Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
6819bc2e YH	14	*
	15	* This program is free software; you can redistribute it and/or
	16	* modify it under the terms of the GNU General Public License as
	17	* published by the Free Software Foundation; either version 2 of
1da177e4	18	* the License, or (at your option) any later version.
6819bc2e	19	*
1da177e4 LT	20	* This program is distributed in the hope that it will be useful,
	21	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	22	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	23	* GNU General Public License for more details.
6819bc2e YH	24	*
	25	* You should have received a copy of the GNU General Public License
	26	* along with this program; if not, write to the Free Software
	27	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
1da177e4	28	* MA 02111-1307 USA
6819bc2e	29	*
1da177e4 LT	30	********************************************************************/
1da177e4 LT	31
1da177e4	32	#include <linux/module.h>
1da177e4 LT	33	#include <linux/proc_fs.h>
	34	#include <linux/seq_file.h>
	35	#include <linux/init.h>
	36
	37	#include <net/irda/irda.h>
	38	#include <net/irda/irmod.h>
	39	#include <net/irda/irlmp.h>
	40	#include <net/irda/iriap.h>
	41	#include <net/irda/irttp.h>
	42	#include <net/irda/irias_object.h>
	43
	44	#include <net/irda/ircomm_event.h>
	45	#include <net/irda/ircomm_lmp.h>
	46	#include <net/irda/ircomm_ttp.h>
	47	#include <net/irda/ircomm_param.h>
	48	#include <net/irda/ircomm_core.h>
	49
	50	static int __ircomm_close(struct ircomm_cb *self);
6819bc2e	51	static void ircomm_control_indication(struct ircomm_cb *self,
1da177e4 LT	52	struct sk_buff *skb, int clen);
	53
	54	#ifdef CONFIG_PROC_FS
	55	extern struct proc_dir_entry *proc_irda;
	56	static int ircomm_seq_open(struct inode , struct file );
	57
da7071d7	58	static const struct file_operations ircomm_proc_fops = {
1da177e4 LT	59	.owner = THIS_MODULE,
	60	.open = ircomm_seq_open,
	61	.read = seq_read,
	62	.llseek = seq_lseek,
	63	.release = seq_release,
	64	};
	65	#endif /* CONFIG_PROC_FS */
	66
	67	hashbin_t *ircomm = NULL;
	68
	69	static int __init ircomm_init(void)
	70	{
6819bc2e	71	ircomm = hashbin_new(HB_LOCK);
1da177e4 LT	72	if (ircomm == NULL) {
	73	IRDA_ERROR("%s(), can't allocate hashbin!\n", __FUNCTION__);
	74	return -ENOMEM;
	75	}
6819bc2e	76
1da177e4 LT	77	#ifdef CONFIG_PROC_FS
	78	{ struct proc_dir_entry *ent;
	79	ent = create_proc_entry("ircomm", 0, proc_irda);
6819bc2e	80	if (ent)
1da177e4 LT	81	ent->proc_fops = &ircomm_proc_fops;
	82	}
	83	#endif /* CONFIG_PROC_FS */
6819bc2e	84
1da177e4	85	IRDA_MESSAGE("IrCOMM protocol (Dag Brattli)\n");
6819bc2e	86
1da177e4 LT	87	return 0;
	88	}
	89
	90	static void __exit ircomm_cleanup(void)
	91	{
	92	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
	93
	94	hashbin_delete(ircomm, (FREE_FUNC) __ircomm_close);
	95
	96	#ifdef CONFIG_PROC_FS
	97	remove_proc_entry("ircomm", proc_irda);
	98	#endif /* CONFIG_PROC_FS */
	99	}
	100
	101	/*
	102	* Function ircomm_open (client_notify)
	103	*
	104	* Start a new IrCOMM instance
	105	*
	106	*/
	107	struct ircomm_cb ircomm_open(notify_t notify, __u8 service_type, int line)
	108	{
	109	struct ircomm_cb *self = NULL;
	110	int ret;
	111
	112	IRDA_DEBUG(2, "%s(), service_type=0x%02x\n", __FUNCTION__ ,
	113	service_type);
	114
	115	IRDA_ASSERT(ircomm != NULL, return NULL;);
	116
0da974f4	117	self = kzalloc(sizeof(struct ircomm_cb), GFP_ATOMIC);
1da177e4 LT	118	if (self == NULL)
	119	return NULL;
	120
1da177e4 LT	121	self->notify = *notify;
	122	self->magic = IRCOMM_MAGIC;
	123
	124	/* Check if we should use IrLMP or IrTTP */
	125	if (service_type & IRCOMM_3_WIRE_RAW) {
	126	self->flow_status = FLOW_START;
	127	ret = ircomm_open_lsap(self);
	128	} else
	129	ret = ircomm_open_tsap(self);
	130
	131	if (ret < 0) {
	132	kfree(self);
	133	return NULL;
	134	}
	135
	136	self->service_type = service_type;
	137	self->line = line;
	138
	139	hashbin_insert(ircomm, (irda_queue_t *) self, line, NULL);
	140
6819bc2e	141	ircomm_next_state(self, IRCOMM_IDLE);
1da177e4 LT	142
	143	return self;
	144	}
	145
	146	EXPORT_SYMBOL(ircomm_open);
	147
	148	/*
	149	* Function ircomm_close_instance (self)
	150	*
	151	* Remove IrCOMM instance
	152	*
	153	*/
	154	static int __ircomm_close(struct ircomm_cb *self)
	155	{
	156	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
	157
	158	/* Disconnect link if any */
	159	ircomm_do_event(self, IRCOMM_DISCONNECT_REQUEST, NULL, NULL);
	160
	161	/* Remove TSAP */
	162	if (self->tsap) {
	163	irttp_close_tsap(self->tsap);
	164	self->tsap = NULL;
	165	}
	166
	167	/* Remove LSAP */
	168	if (self->lsap) {
	169	irlmp_close_lsap(self->lsap);
	170	self->lsap = NULL;
	171	}
	172	self->magic = 0;
	173
	174	kfree(self);
	175
	176	return 0;
	177	}
	178
	179	/*
	180	* Function ircomm_close (self)
	181	*
	182	* Closes and removes the specified IrCOMM instance
	183	*
	184	*/
	185	int ircomm_close(struct ircomm_cb *self)
	186	{
	187	struct ircomm_cb *entry;
	188
	189	IRDA_ASSERT(self != NULL, return -EIO;);
	190	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EIO;);
	191
	192	IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
	193
	194	entry = hashbin_remove(ircomm, self->line, NULL);
	195
	196	IRDA_ASSERT(entry == self, return -1;);
6819bc2e YH	197
6819bc2e YH	198	return __ircomm_close(self);
1da177e4 LT	199	}
	200
	201	EXPORT_SYMBOL(ircomm_close);
	202
	203	/*
	204	* Function ircomm_connect_request (self, service_type)
	205	*
	206	* Impl. of this function is differ from one of the reference. This
	207	* function does discovery as well as sending connect request
6819bc2e	208	*
1da177e4	209	*/
6819bc2e	210	int ircomm_connect_request(struct ircomm_cb *self, __u8 dlsap_sel,
1da177e4 LT	211	__u32 saddr, __u32 daddr, struct sk_buff *skb,
	212	__u8 service_type)
	213	{
	214	struct ircomm_info info;
	215	int ret;
	216
	217	IRDA_DEBUG(2 , "%s()\n", __FUNCTION__ );
	218
	219	IRDA_ASSERT(self != NULL, return -1;);
	220	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
	221
	222	self->service_type= service_type;
	223
	224	info.dlsap_sel = dlsap_sel;
	225	info.saddr = saddr;
	226	info.daddr = daddr;
	227
	228	ret = ircomm_do_event(self, IRCOMM_CONNECT_REQUEST, skb, &info);
	229
	230	return ret;
	231	}
	232
	233	EXPORT_SYMBOL(ircomm_connect_request);
	234
	235	/*
	236	* Function ircomm_connect_indication (self, qos, skb)
	237	*
	238	* Notify user layer about the incoming connection
	239	*
	240	*/
	241	void ircomm_connect_indication(struct ircomm_cb self, struct sk_buff skb,
	242	struct ircomm_info *info)
	243	{
	244	int clen = 0;
6819bc2e	245
1da177e4 LT	246	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
	247
	248	/* Check if the packet contains data on the control channel */
	249	if (skb->len > 0)
	250	clen = skb->data[0];
6819bc2e YH	251
	252	/*
	253	* If there are any data hiding in the control channel, we must
	254	* deliver it first. The side effect is that the control channel
1da177e4 LT	255	* will be removed from the skb
	256	*/
	257	if (self->notify.connect_indication)
6819bc2e	258	self->notify.connect_indication(self->notify.instance, self,
1da177e4 LT	259	info->qos, info->max_data_size,
	260	info->max_header_size, skb);
	261	else {
	262	IRDA_DEBUG(0, "%s(), missing handler\n", __FUNCTION__ );
	263	}
	264	}
	265
	266	/*
	267	* Function ircomm_connect_response (self, userdata, max_sdu_size)
	268	*
	269	* User accepts connection
	270	*
	271	*/
	272	int ircomm_connect_response(struct ircomm_cb self, struct sk_buff userdata)
	273	{
	274	int ret;
	275
	276	IRDA_ASSERT(self != NULL, return -1;);
	277	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
	278
	279	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
	280
	281	ret = ircomm_do_event(self, IRCOMM_CONNECT_RESPONSE, userdata, NULL);
	282
	283	return ret;
6819bc2e	284	}
1da177e4 LT	285
	286	EXPORT_SYMBOL(ircomm_connect_response);
	287
	288	/*
	289	* Function connect_confirm (self, skb)
	290	*
	291	* Notify user layer that the link is now connected
	292	*
	293	*/
	294	void ircomm_connect_confirm(struct ircomm_cb self, struct sk_buff skb,
	295	struct ircomm_info *info)
	296	{
	297	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
	298
	299	if (self->notify.connect_confirm )
	300	self->notify.connect_confirm(self->notify.instance,
6819bc2e	301	self, info->qos,
1da177e4 LT	302	info->max_data_size,
	303	info->max_header_size, skb);
	304	else {
	305	IRDA_DEBUG(0, "%s(), missing handler\n", __FUNCTION__ );
	306	}
	307	}
	308
	309	/*
	310	* Function ircomm_data_request (self, userdata)
	311	*
	312	* Send IrCOMM data to peer device
	313	*
	314	*/
	315	int ircomm_data_request(struct ircomm_cb self, struct sk_buff skb)
	316	{
	317	int ret;
	318
	319	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
	320
	321	IRDA_ASSERT(self != NULL, return -EFAULT;);
	322	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;);
	323	IRDA_ASSERT(skb != NULL, return -EFAULT;);
6819bc2e	324
1da177e4 LT	325	ret = ircomm_do_event(self, IRCOMM_DATA_REQUEST, skb, NULL);
	326
	327	return ret;
	328	}
	329
	330	EXPORT_SYMBOL(ircomm_data_request);
	331
	332	/*
	333	* Function ircomm_data_indication (self, skb)
	334	*
	335	* Data arrived, so deliver it to user
	336	*
	337	*/
	338	void ircomm_data_indication(struct ircomm_cb self, struct sk_buff skb)
6819bc2e	339	{
1da177e4 LT	340	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
	341
	342	IRDA_ASSERT(skb->len > 0, return;);
	343
	344	if (self->notify.data_indication)
	345	self->notify.data_indication(self->notify.instance, self, skb);
	346	else {
	347	IRDA_DEBUG(0, "%s(), missing handler\n", __FUNCTION__ );
	348	}
	349	}
	350
	351	/*
	352	* Function ircomm_process_data (self, skb)
	353	*
	354	* Data arrived which may contain control channel data
	355	*
	356	*/
	357	void ircomm_process_data(struct ircomm_cb self, struct sk_buff skb)
	358	{
	359	int clen;
	360
	361	IRDA_ASSERT(skb->len > 0, return;);
	362
	363	clen = skb->data[0];
	364
6819bc2e YH	365	/*
	366	* If there are any data hiding in the control channel, we must
	367	* deliver it first. The side effect is that the control channel
1da177e4 LT	368	* will be removed from the skb
	369	*/
	370	if (clen > 0)
	371	ircomm_control_indication(self, skb, clen);
	372
	373	/* Remove control channel from data channel */
	374	skb_pull(skb, clen+1);
	375
	376	if (skb->len)
6819bc2e	377	ircomm_data_indication(self, skb);
1da177e4 LT	378	else {
	379	IRDA_DEBUG(4, "%s(), data was control info only!\n",
	380	__FUNCTION__ );
	381	}
	382	}
	383
	384	/*
	385	* Function ircomm_control_request (self, params)
	386	*
	387	* Send control data to peer device
	388	*
	389	*/
	390	int ircomm_control_request(struct ircomm_cb self, struct sk_buff skb)
	391	{
	392	int ret;
6819bc2e	393
1da177e4 LT	394	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
	395
	396	IRDA_ASSERT(self != NULL, return -EFAULT;);
	397	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;);
	398	IRDA_ASSERT(skb != NULL, return -EFAULT;);
6819bc2e	399
1da177e4 LT	400	ret = ircomm_do_event(self, IRCOMM_CONTROL_REQUEST, skb, NULL);
	401
	402	return ret;
	403	}
	404
	405	EXPORT_SYMBOL(ircomm_control_request);
	406
	407	/*
	408	* Function ircomm_control_indication (self, skb)
	409	*
	410	* Data has arrived on the control channel
	411	*
	412	*/
6819bc2e	413	static void ircomm_control_indication(struct ircomm_cb *self,
1da177e4 LT	414	struct sk_buff *skb, int clen)
1da177e4 LT	415	{
6819bc2e	416	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
1da177e4 LT	417
	418	/* Use udata for delivering data on the control channel */
	419	if (self->notify.udata_indication) {
	420	struct sk_buff *ctrl_skb;
	421
	422	/* We don't own the skb, so clone it */
	423	ctrl_skb = skb_clone(skb, GFP_ATOMIC);
	424	if (!ctrl_skb)
	425	return;
	426
	427	/* Remove data channel from control channel */
	428	skb_trim(ctrl_skb, clen+1);
6819bc2e YH	429
6819bc2e YH	430	self->notify.udata_indication(self->notify.instance, self,
1da177e4 LT	431	ctrl_skb);
	432
	433	/* Drop reference count -
	434	* see ircomm_tty_control_indication(). */
	435	dev_kfree_skb(ctrl_skb);
	436	} else {
	437	IRDA_DEBUG(0, "%s(), missing handler\n", __FUNCTION__ );
	438	}
	439	}
	440
	441	/*
	442	* Function ircomm_disconnect_request (self, userdata, priority)
	443	*
	444	* User layer wants to disconnect the IrCOMM connection
	445	*
	446	*/
	447	int ircomm_disconnect_request(struct ircomm_cb self, struct sk_buff userdata)
	448	{
	449	struct ircomm_info info;
	450	int ret;
	451
	452	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
	453
	454	IRDA_ASSERT(self != NULL, return -1;);
	455	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
	456
6819bc2e	457	ret = ircomm_do_event(self, IRCOMM_DISCONNECT_REQUEST, userdata,
1da177e4 LT	458	&info);
	459	return ret;
	460	}
	461
	462	EXPORT_SYMBOL(ircomm_disconnect_request);
	463
	464	/*
	465	* Function disconnect_indication (self, skb)
	466	*
	467	* Tell user that the link has been disconnected
	468	*
	469	*/
	470	void ircomm_disconnect_indication(struct ircomm_cb self, struct sk_buff skb,
	471	struct ircomm_info *info)
	472	{
	473	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
6819bc2e	474
1da177e4 LT	475	IRDA_ASSERT(info != NULL, return;);
	476
	477	if (self->notify.disconnect_indication) {
	478	self->notify.disconnect_indication(self->notify.instance, self,
	479	info->reason, skb);
	480	} else {
	481	IRDA_DEBUG(0, "%s(), missing handler\n", __FUNCTION__ );
	482	}
	483	}
	484
	485	/*
	486	* Function ircomm_flow_request (self, flow)
	487	*
6819bc2e	488	*
1da177e4 LT	489	*
	490	*/
	491	void ircomm_flow_request(struct ircomm_cb *self, LOCAL_FLOW flow)
	492	{
	493	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
	494
	495	IRDA_ASSERT(self != NULL, return;);
	496	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);
	497
	498	if (self->service_type == IRCOMM_3_WIRE_RAW)
	499	return;
	500
	501	irttp_flow_request(self->tsap, flow);
	502	}
	503
	504	EXPORT_SYMBOL(ircomm_flow_request);
	505
	506	#ifdef CONFIG_PROC_FS
	507	static void ircomm_seq_start(struct seq_file seq, loff_t *pos)
	508	{
	509	struct ircomm_cb *self;
	510	loff_t off = 0;
	511
	512	spin_lock_irq(&ircomm->hb_spinlock);
	513
	514	for (self = (struct ircomm_cb *) hashbin_get_first(ircomm);
	515	self != NULL;
	516	self = (struct ircomm_cb *) hashbin_get_next(ircomm)) {
	517	if (off++ == *pos)
	518	break;
6819bc2e	519
1da177e4 LT	520	}
	521	return self;
	522	}
	523
	524	static void ircomm_seq_next(struct seq_file seq, void v, loff_t pos)
	525	{
	526	++*pos;
	527
	528	return (void *) hashbin_get_next(ircomm);
	529	}
	530
	531	static void ircomm_seq_stop(struct seq_file seq, void v)
	532	{
	533	spin_unlock_irq(&ircomm->hb_spinlock);
	534	}
	535
	536	static int ircomm_seq_show(struct seq_file seq, void v)
6819bc2e	537	{
1da177e4 LT	538	const struct ircomm_cb *self = v;
	539
	540	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EINVAL; );
	541
	542	if(self->line < 0x10)
	543	seq_printf(seq, "ircomm%d", self->line);
	544	else
	545	seq_printf(seq, "irlpt%d", self->line - 0x10);
	546
	547	seq_printf(seq,
	548	" state: %s, slsap_sel: %#02x, dlsap_sel: %#02x, mode:",
	549	ircomm_state[ self->state],
6819bc2e	550	self->slsap_sel, self->dlsap_sel);
1da177e4 LT	551
	552	if(self->service_type & IRCOMM_3_WIRE_RAW)
	553	seq_printf(seq, " 3-wire-raw");
	554	if(self->service_type & IRCOMM_3_WIRE)
	555	seq_printf(seq, " 3-wire");
	556	if(self->service_type & IRCOMM_9_WIRE)
	557	seq_printf(seq, " 9-wire");
	558	if(self->service_type & IRCOMM_CENTRONICS)
	559	seq_printf(seq, " Centronics");
	560	seq_putc(seq, '\n');
	561
	562	return 0;
	563	}
	564
56b3d975	565	static const struct seq_operations ircomm_seq_ops = {
1da177e4 LT	566	.start = ircomm_seq_start,
	567	.next = ircomm_seq_next,
	568	.stop = ircomm_seq_stop,
	569	.show = ircomm_seq_show,
	570	};
	571
	572	static int ircomm_seq_open(struct inode inode, struct file file)
	573	{
	574	return seq_open(file, &ircomm_seq_ops);
	575	}
	576	#endif /* CONFIG_PROC_FS */
	577
	578	MODULE_AUTHOR("Dag Brattli <dag@brattli.net>");
	579	MODULE_DESCRIPTION("IrCOMM protocol");
	580	MODULE_LICENSE("GPL");
	581
	582	module_init(ircomm_init);
	583	module_exit(ircomm_cleanup);