[linux-block.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 <linux/slab.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", __func__);
		return -ENOMEM;
	}

#ifdef CONFIG_PROC_FS
	{ struct proc_dir_entry *ent;
	ent = proc_create("ircomm", 0, proc_irda, &ircomm_proc_fops);
	if (!ent) {
		printk(KERN_ERR "ircomm_init: can't create /proc entry!\n");
		return -ENODEV;
	}
	}
#endif /* CONFIG_PROC_FS */

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

	return 0;
}

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

	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", __func__ ,
		   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", __func__ );

	/* 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", __func__ );

	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", __func__ );

	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", __func__ );

	/* 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", __func__ );
	}
}

/*
 * 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", __func__ );

	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", __func__ );

	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", __func__ );
	}
}

/*
 * 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", __func__ );

	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", __func__ );

	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", __func__ );
	}
}

/*
 * 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];

	/*
	 * Input validation check: a stir4200/mcp2150 combinations sometimes
	 * results in frames with clen > remaining packet size. These are
	 * illegal; if we throw away just this frame then it seems to carry on
	 * fine
	 */
	if (unlikely(skb->len < (clen + 1))) {
		IRDA_DEBUG(2, "%s() throwing away illegal frame\n",
			   __func__ );
		return;
	}

	/*
	 * 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",
			   __func__ );
	}
}

/*
 * 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", __func__ );

	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", __func__ );

	/* 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", __func__ );
	}
}

/*
 * 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", __func__ );

	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", __func__ );

	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", __func__ );
	}
}

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

	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>
5a0e3ad6	36	#include <linux/slab.h>
1da177e4 LT	37
	38	#include <net/irda/irda.h>
	39	#include <net/irda/irmod.h>
	40	#include <net/irda/irlmp.h>
	41	#include <net/irda/iriap.h>
	42	#include <net/irda/irttp.h>
	43	#include <net/irda/irias_object.h>
	44
	45	#include <net/irda/ircomm_event.h>
	46	#include <net/irda/ircomm_lmp.h>
	47	#include <net/irda/ircomm_ttp.h>
	48	#include <net/irda/ircomm_param.h>
	49	#include <net/irda/ircomm_core.h>
	50
	51	static int __ircomm_close(struct ircomm_cb *self);
6819bc2e	52	static void ircomm_control_indication(struct ircomm_cb *self,
1da177e4 LT	53	struct sk_buff *skb, int clen);
	54
	55	#ifdef CONFIG_PROC_FS
	56	extern struct proc_dir_entry *proc_irda;
	57	static int ircomm_seq_open(struct inode , struct file );
	58
da7071d7	59	static const struct file_operations ircomm_proc_fops = {
1da177e4 LT	60	.owner = THIS_MODULE,
	61	.open = ircomm_seq_open,
	62	.read = seq_read,
	63	.llseek = seq_lseek,
	64	.release = seq_release,
	65	};
	66	#endif /* CONFIG_PROC_FS */
	67
	68	hashbin_t *ircomm = NULL;
	69
	70	static int __init ircomm_init(void)
	71	{
6819bc2e	72	ircomm = hashbin_new(HB_LOCK);
1da177e4	73	if (ircomm == NULL) {
0dc47877	74	IRDA_ERROR("%s(), can't allocate hashbin!\n", __func__);
1da177e4 LT	75	return -ENOMEM;
1da177e4 LT	76	}
6819bc2e	77
1da177e4 LT	78	#ifdef CONFIG_PROC_FS
1da177e4 LT	79	{ struct proc_dir_entry *ent;
5e47879f WC	80	ent = proc_create("ircomm", 0, proc_irda, &ircomm_proc_fops);
	81	if (!ent) {
	82	printk(KERN_ERR "ircomm_init: can't create /proc entry!\n");
	83	return -ENODEV;
	84	}
1da177e4 LT	85	}
1da177e4 LT	86	#endif /* CONFIG_PROC_FS */
6819bc2e	87
1da177e4	88	IRDA_MESSAGE("IrCOMM protocol (Dag Brattli)\n");
6819bc2e	89
1da177e4 LT	90	return 0;
	91	}
	92
	93	static void __exit ircomm_cleanup(void)
	94	{
0dc47877	95	IRDA_DEBUG(2, "%s()\n", __func__ );
1da177e4 LT	96
	97	hashbin_delete(ircomm, (FREE_FUNC) __ircomm_close);
	98
	99	#ifdef CONFIG_PROC_FS
	100	remove_proc_entry("ircomm", proc_irda);
	101	#endif /* CONFIG_PROC_FS */
	102	}
	103
	104	/*
	105	* Function ircomm_open (client_notify)
	106	*
	107	* Start a new IrCOMM instance
	108	*
	109	*/
	110	struct ircomm_cb ircomm_open(notify_t notify, __u8 service_type, int line)
	111	{
	112	struct ircomm_cb *self = NULL;
	113	int ret;
	114
0dc47877	115	IRDA_DEBUG(2, "%s(), service_type=0x%02x\n", __func__ ,
1da177e4 LT	116	service_type);
	117
	118	IRDA_ASSERT(ircomm != NULL, return NULL;);
	119
0da974f4	120	self = kzalloc(sizeof(struct ircomm_cb), GFP_ATOMIC);
1da177e4 LT	121	if (self == NULL)
	122	return NULL;
	123
1da177e4 LT	124	self->notify = *notify;
	125	self->magic = IRCOMM_MAGIC;
	126
	127	/* Check if we should use IrLMP or IrTTP */
	128	if (service_type & IRCOMM_3_WIRE_RAW) {
	129	self->flow_status = FLOW_START;
	130	ret = ircomm_open_lsap(self);
	131	} else
	132	ret = ircomm_open_tsap(self);
	133
	134	if (ret < 0) {
	135	kfree(self);
	136	return NULL;
	137	}
	138
	139	self->service_type = service_type;
	140	self->line = line;
	141
	142	hashbin_insert(ircomm, (irda_queue_t *) self, line, NULL);
	143
6819bc2e	144	ircomm_next_state(self, IRCOMM_IDLE);
1da177e4 LT	145
	146	return self;
	147	}
	148
	149	EXPORT_SYMBOL(ircomm_open);
	150
	151	/*
	152	* Function ircomm_close_instance (self)
	153	*
	154	* Remove IrCOMM instance
	155	*
	156	*/
	157	static int __ircomm_close(struct ircomm_cb *self)
	158	{
0dc47877	159	IRDA_DEBUG(2, "%s()\n", __func__ );
1da177e4 LT	160
	161	/* Disconnect link if any */
	162	ircomm_do_event(self, IRCOMM_DISCONNECT_REQUEST, NULL, NULL);
	163
	164	/* Remove TSAP */
	165	if (self->tsap) {
	166	irttp_close_tsap(self->tsap);
	167	self->tsap = NULL;
	168	}
	169
	170	/* Remove LSAP */
	171	if (self->lsap) {
	172	irlmp_close_lsap(self->lsap);
	173	self->lsap = NULL;
	174	}
	175	self->magic = 0;
	176
	177	kfree(self);
	178
	179	return 0;
	180	}
	181
	182	/*
	183	* Function ircomm_close (self)
	184	*
	185	* Closes and removes the specified IrCOMM instance
	186	*
	187	*/
	188	int ircomm_close(struct ircomm_cb *self)
	189	{
	190	struct ircomm_cb *entry;
	191
	192	IRDA_ASSERT(self != NULL, return -EIO;);
	193	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EIO;);
	194
0dc47877	195	IRDA_DEBUG(0, "%s()\n", __func__ );
1da177e4 LT	196
	197	entry = hashbin_remove(ircomm, self->line, NULL);
	198
	199	IRDA_ASSERT(entry == self, return -1;);
6819bc2e YH	200
6819bc2e YH	201	return __ircomm_close(self);
1da177e4 LT	202	}
	203
	204	EXPORT_SYMBOL(ircomm_close);
	205
	206	/*
	207	* Function ircomm_connect_request (self, service_type)
	208	*
	209	* Impl. of this function is differ from one of the reference. This
	210	* function does discovery as well as sending connect request
6819bc2e	211	*
1da177e4	212	*/
6819bc2e	213	int ircomm_connect_request(struct ircomm_cb *self, __u8 dlsap_sel,
1da177e4 LT	214	__u32 saddr, __u32 daddr, struct sk_buff *skb,
	215	__u8 service_type)
	216	{
	217	struct ircomm_info info;
	218	int ret;
	219
0dc47877	220	IRDA_DEBUG(2 , "%s()\n", __func__ );
1da177e4 LT	221
	222	IRDA_ASSERT(self != NULL, return -1;);
	223	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
	224
	225	self->service_type= service_type;
	226
	227	info.dlsap_sel = dlsap_sel;
	228	info.saddr = saddr;
	229	info.daddr = daddr;
	230
	231	ret = ircomm_do_event(self, IRCOMM_CONNECT_REQUEST, skb, &info);
	232
	233	return ret;
	234	}
	235
	236	EXPORT_SYMBOL(ircomm_connect_request);
	237
	238	/*
	239	* Function ircomm_connect_indication (self, qos, skb)
	240	*
	241	* Notify user layer about the incoming connection
	242	*
	243	*/
	244	void ircomm_connect_indication(struct ircomm_cb self, struct sk_buff skb,
	245	struct ircomm_info *info)
	246	{
	247	int clen = 0;
6819bc2e	248
0dc47877	249	IRDA_DEBUG(2, "%s()\n", __func__ );
1da177e4 LT	250
	251	/* Check if the packet contains data on the control channel */
	252	if (skb->len > 0)
	253	clen = skb->data[0];
6819bc2e YH	254
	255	/*
	256	* If there are any data hiding in the control channel, we must
	257	* deliver it first. The side effect is that the control channel
1da177e4 LT	258	* will be removed from the skb
	259	*/
	260	if (self->notify.connect_indication)
6819bc2e	261	self->notify.connect_indication(self->notify.instance, self,
1da177e4 LT	262	info->qos, info->max_data_size,
	263	info->max_header_size, skb);
	264	else {
0dc47877	265	IRDA_DEBUG(0, "%s(), missing handler\n", __func__ );
1da177e4 LT	266	}
	267	}
	268
	269	/*
	270	* Function ircomm_connect_response (self, userdata, max_sdu_size)
	271	*
	272	* User accepts connection
	273	*
	274	*/
	275	int ircomm_connect_response(struct ircomm_cb self, struct sk_buff userdata)
	276	{
	277	int ret;
	278
	279	IRDA_ASSERT(self != NULL, return -1;);
	280	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
	281
0dc47877	282	IRDA_DEBUG(4, "%s()\n", __func__ );
1da177e4 LT	283
	284	ret = ircomm_do_event(self, IRCOMM_CONNECT_RESPONSE, userdata, NULL);
	285
	286	return ret;
6819bc2e	287	}
1da177e4 LT	288
	289	EXPORT_SYMBOL(ircomm_connect_response);
	290
	291	/*
	292	* Function connect_confirm (self, skb)
	293	*
	294	* Notify user layer that the link is now connected
	295	*
	296	*/
	297	void ircomm_connect_confirm(struct ircomm_cb self, struct sk_buff skb,
	298	struct ircomm_info *info)
	299	{
0dc47877	300	IRDA_DEBUG(4, "%s()\n", __func__ );
1da177e4 LT	301
	302	if (self->notify.connect_confirm )
	303	self->notify.connect_confirm(self->notify.instance,
6819bc2e	304	self, info->qos,
1da177e4 LT	305	info->max_data_size,
	306	info->max_header_size, skb);
	307	else {
0dc47877	308	IRDA_DEBUG(0, "%s(), missing handler\n", __func__ );
1da177e4 LT	309	}
	310	}
	311
	312	/*
	313	* Function ircomm_data_request (self, userdata)
	314	*
	315	* Send IrCOMM data to peer device
	316	*
	317	*/
	318	int ircomm_data_request(struct ircomm_cb self, struct sk_buff skb)
	319	{
	320	int ret;
	321
0dc47877	322	IRDA_DEBUG(4, "%s()\n", __func__ );
1da177e4 LT	323
	324	IRDA_ASSERT(self != NULL, return -EFAULT;);
	325	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;);
	326	IRDA_ASSERT(skb != NULL, return -EFAULT;);
6819bc2e	327
1da177e4 LT	328	ret = ircomm_do_event(self, IRCOMM_DATA_REQUEST, skb, NULL);
	329
	330	return ret;
	331	}
	332
	333	EXPORT_SYMBOL(ircomm_data_request);
	334
	335	/*
	336	* Function ircomm_data_indication (self, skb)
	337	*
	338	* Data arrived, so deliver it to user
	339	*
	340	*/
	341	void ircomm_data_indication(struct ircomm_cb self, struct sk_buff skb)
6819bc2e	342	{
0dc47877	343	IRDA_DEBUG(4, "%s()\n", __func__ );
1da177e4 LT	344
	345	IRDA_ASSERT(skb->len > 0, return;);
	346
	347	if (self->notify.data_indication)
	348	self->notify.data_indication(self->notify.instance, self, skb);
	349	else {
0dc47877	350	IRDA_DEBUG(0, "%s(), missing handler\n", __func__ );
1da177e4 LT	351	}
	352	}
	353
	354	/*
	355	* Function ircomm_process_data (self, skb)
	356	*
	357	* Data arrived which may contain control channel data
	358	*
	359	*/
	360	void ircomm_process_data(struct ircomm_cb self, struct sk_buff skb)
	361	{
	362	int clen;
	363
	364	IRDA_ASSERT(skb->len > 0, return;);
	365
	366	clen = skb->data[0];
	367
5d780cd6 RB	368	/*
	369	* Input validation check: a stir4200/mcp2150 combinations sometimes
	370	* results in frames with clen > remaining packet size. These are
	371	* illegal; if we throw away just this frame then it seems to carry on
	372	* fine
	373	*/
	374	if (unlikely(skb->len < (clen + 1))) {
	375	IRDA_DEBUG(2, "%s() throwing away illegal frame\n",
0dc47877	376	__func__ );
5d780cd6 RB	377	return;
	378	}
	379
6819bc2e YH	380	/*
	381	* If there are any data hiding in the control channel, we must
	382	* deliver it first. The side effect is that the control channel
1da177e4 LT	383	* will be removed from the skb
	384	*/
	385	if (clen > 0)
	386	ircomm_control_indication(self, skb, clen);
	387
	388	/* Remove control channel from data channel */
	389	skb_pull(skb, clen+1);
	390
	391	if (skb->len)
6819bc2e	392	ircomm_data_indication(self, skb);
1da177e4 LT	393	else {
1da177e4 LT	394	IRDA_DEBUG(4, "%s(), data was control info only!\n",
0dc47877	395	__func__ );
1da177e4 LT	396	}
	397	}
	398
	399	/*
	400	* Function ircomm_control_request (self, params)
	401	*
	402	* Send control data to peer device
	403	*
	404	*/
	405	int ircomm_control_request(struct ircomm_cb self, struct sk_buff skb)
	406	{
	407	int ret;
6819bc2e	408
0dc47877	409	IRDA_DEBUG(2, "%s()\n", __func__ );
1da177e4 LT	410
	411	IRDA_ASSERT(self != NULL, return -EFAULT;);
	412	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;);
	413	IRDA_ASSERT(skb != NULL, return -EFAULT;);
6819bc2e	414
1da177e4 LT	415	ret = ircomm_do_event(self, IRCOMM_CONTROL_REQUEST, skb, NULL);
	416
	417	return ret;
	418	}
	419
	420	EXPORT_SYMBOL(ircomm_control_request);
	421
	422	/*
	423	* Function ircomm_control_indication (self, skb)
	424	*
	425	* Data has arrived on the control channel
	426	*
	427	*/
6819bc2e	428	static void ircomm_control_indication(struct ircomm_cb *self,
1da177e4 LT	429	struct sk_buff *skb, int clen)
1da177e4 LT	430	{
0dc47877	431	IRDA_DEBUG(2, "%s()\n", __func__ );
1da177e4 LT	432
	433	/* Use udata for delivering data on the control channel */
	434	if (self->notify.udata_indication) {
	435	struct sk_buff *ctrl_skb;
	436
	437	/* We don't own the skb, so clone it */
	438	ctrl_skb = skb_clone(skb, GFP_ATOMIC);
	439	if (!ctrl_skb)
	440	return;
	441
	442	/* Remove data channel from control channel */
	443	skb_trim(ctrl_skb, clen+1);
6819bc2e YH	444
6819bc2e YH	445	self->notify.udata_indication(self->notify.instance, self,
1da177e4 LT	446	ctrl_skb);
	447
	448	/* Drop reference count -
	449	* see ircomm_tty_control_indication(). */
	450	dev_kfree_skb(ctrl_skb);
	451	} else {
0dc47877	452	IRDA_DEBUG(0, "%s(), missing handler\n", __func__ );
1da177e4 LT	453	}
	454	}
	455
	456	/*
	457	* Function ircomm_disconnect_request (self, userdata, priority)
	458	*
	459	* User layer wants to disconnect the IrCOMM connection
	460	*
	461	*/
	462	int ircomm_disconnect_request(struct ircomm_cb self, struct sk_buff userdata)
	463	{
	464	struct ircomm_info info;
	465	int ret;
	466
0dc47877	467	IRDA_DEBUG(2, "%s()\n", __func__ );
1da177e4 LT	468
	469	IRDA_ASSERT(self != NULL, return -1;);
	470	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
	471
6819bc2e	472	ret = ircomm_do_event(self, IRCOMM_DISCONNECT_REQUEST, userdata,
1da177e4 LT	473	&info);
	474	return ret;
	475	}
	476
	477	EXPORT_SYMBOL(ircomm_disconnect_request);
	478
	479	/*
	480	* Function disconnect_indication (self, skb)
	481	*
	482	* Tell user that the link has been disconnected
	483	*
	484	*/
	485	void ircomm_disconnect_indication(struct ircomm_cb self, struct sk_buff skb,
	486	struct ircomm_info *info)
	487	{
0dc47877	488	IRDA_DEBUG(2, "%s()\n", __func__ );
6819bc2e	489
1da177e4 LT	490	IRDA_ASSERT(info != NULL, return;);
	491
	492	if (self->notify.disconnect_indication) {
	493	self->notify.disconnect_indication(self->notify.instance, self,
	494	info->reason, skb);
	495	} else {
0dc47877	496	IRDA_DEBUG(0, "%s(), missing handler\n", __func__ );
1da177e4 LT	497	}
	498	}
	499
	500	/*
	501	* Function ircomm_flow_request (self, flow)
	502	*
6819bc2e	503	*
1da177e4 LT	504	*
	505	*/
	506	void ircomm_flow_request(struct ircomm_cb *self, LOCAL_FLOW flow)
	507	{
0dc47877	508	IRDA_DEBUG(2, "%s()\n", __func__ );
1da177e4 LT	509
	510	IRDA_ASSERT(self != NULL, return;);
	511	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);
	512
	513	if (self->service_type == IRCOMM_3_WIRE_RAW)
	514	return;
	515
	516	irttp_flow_request(self->tsap, flow);
	517	}
	518
	519	EXPORT_SYMBOL(ircomm_flow_request);
	520
	521	#ifdef CONFIG_PROC_FS
	522	static void ircomm_seq_start(struct seq_file seq, loff_t *pos)
	523	{
	524	struct ircomm_cb *self;
	525	loff_t off = 0;
	526
	527	spin_lock_irq(&ircomm->hb_spinlock);
	528
	529	for (self = (struct ircomm_cb *) hashbin_get_first(ircomm);
	530	self != NULL;
	531	self = (struct ircomm_cb *) hashbin_get_next(ircomm)) {
	532	if (off++ == *pos)
	533	break;
6819bc2e	534
1da177e4 LT	535	}
	536	return self;
	537	}
	538
	539	static void ircomm_seq_next(struct seq_file seq, void v, loff_t pos)
	540	{
	541	++*pos;
	542
	543	return (void *) hashbin_get_next(ircomm);
	544	}
	545
	546	static void ircomm_seq_stop(struct seq_file seq, void v)
	547	{
	548	spin_unlock_irq(&ircomm->hb_spinlock);
	549	}
	550
	551	static int ircomm_seq_show(struct seq_file seq, void v)
6819bc2e	552	{
1da177e4 LT	553	const struct ircomm_cb *self = v;
	554
	555	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EINVAL; );
	556
	557	if(self->line < 0x10)
	558	seq_printf(seq, "ircomm%d", self->line);
	559	else
	560	seq_printf(seq, "irlpt%d", self->line - 0x10);
	561
	562	seq_printf(seq,
	563	" state: %s, slsap_sel: %#02x, dlsap_sel: %#02x, mode:",
	564	ircomm_state[ self->state],
6819bc2e	565	self->slsap_sel, self->dlsap_sel);
1da177e4 LT	566
	567	if(self->service_type & IRCOMM_3_WIRE_RAW)
	568	seq_printf(seq, " 3-wire-raw");
	569	if(self->service_type & IRCOMM_3_WIRE)
	570	seq_printf(seq, " 3-wire");
	571	if(self->service_type & IRCOMM_9_WIRE)
	572	seq_printf(seq, " 9-wire");
	573	if(self->service_type & IRCOMM_CENTRONICS)
	574	seq_printf(seq, " Centronics");
	575	seq_putc(seq, '\n');
	576
	577	return 0;
	578	}
	579
56b3d975	580	static const struct seq_operations ircomm_seq_ops = {
1da177e4 LT	581	.start = ircomm_seq_start,
	582	.next = ircomm_seq_next,
	583	.stop = ircomm_seq_stop,
	584	.show = ircomm_seq_show,
	585	};
	586
	587	static int ircomm_seq_open(struct inode inode, struct file file)
	588	{
	589	return seq_open(file, &ircomm_seq_ops);
	590	}
	591	#endif /* CONFIG_PROC_FS */
	592
	593	MODULE_AUTHOR("Dag Brattli <dag@brattli.net>");
	594	MODULE_DESCRIPTION("IrCOMM protocol");
	595	MODULE_LICENSE("GPL");
	596
	597	module_init(ircomm_init);
	598	module_exit(ircomm_cleanup);