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