[deliverable/linux.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, see <http://www.gnu.org/licenses/>.
 *
 ********************************************************************/

#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) {
		net_err_ratelimited("%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 */

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

	return 0;
}

static void __exit ircomm_cleanup(void)
{
	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;

	pr_debug("%s(), service_type=0x%02x\n", __func__ ,
		 service_type);

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

	self = kzalloc(sizeof(struct ircomm_cb), GFP_KERNEL);
	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)
{
	/* 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;);

	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_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)
{
	/*
	 * 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 {
		pr_debug("%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;);

	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)
{
	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 {
		pr_debug("%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_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_ASSERT(skb->len > 0, return;);

	if (self->notify.data_indication)
		self->notify.data_indication(self->notify.instance, self, skb);
	else {
		pr_debug("%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))) {
		pr_debug("%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 {
		pr_debug("%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_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)
{
	/* 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 {
		pr_debug("%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_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_ASSERT(info != NULL, return;);

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

/*
 * Function ircomm_flow_request (self, flow)
 *
 *
 *
 */
void ircomm_flow_request(struct ircomm_cb *self, LOCAL_FLOW flow)
{
	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	*
6819bc2e YH	25	* You should have received a copy of the GNU General Public License
d3770509	26	* along with this program; if not, see <http://www.gnu.org/licenses/>.
6819bc2e	27	*
1da177e4 LT	28	********************************************************************/
1da177e4 LT	29
1da177e4	30	#include <linux/module.h>
1da177e4 LT	31	#include <linux/proc_fs.h>
	32	#include <linux/seq_file.h>
	33	#include <linux/init.h>
5a0e3ad6	34	#include <linux/slab.h>
1da177e4 LT	35
	36	#include <net/irda/irda.h>
	37	#include <net/irda/irmod.h>
	38	#include <net/irda/irlmp.h>
	39	#include <net/irda/iriap.h>
	40	#include <net/irda/irttp.h>
	41	#include <net/irda/irias_object.h>
	42
	43	#include <net/irda/ircomm_event.h>
	44	#include <net/irda/ircomm_lmp.h>
	45	#include <net/irda/ircomm_ttp.h>
	46	#include <net/irda/ircomm_param.h>
	47	#include <net/irda/ircomm_core.h>
	48
	49	static int __ircomm_close(struct ircomm_cb *self);
6819bc2e	50	static void ircomm_control_indication(struct ircomm_cb *self,
1da177e4 LT	51	struct sk_buff *skb, int clen);
	52
	53	#ifdef CONFIG_PROC_FS
	54	extern struct proc_dir_entry *proc_irda;
	55	static int ircomm_seq_open(struct inode , struct file );
	56
da7071d7	57	static const struct file_operations ircomm_proc_fops = {
1da177e4 LT	58	.owner = THIS_MODULE,
	59	.open = ircomm_seq_open,
	60	.read = seq_read,
	61	.llseek = seq_lseek,
	62	.release = seq_release,
	63	};
	64	#endif /* CONFIG_PROC_FS */
	65
	66	hashbin_t *ircomm = NULL;
	67
	68	static int __init ircomm_init(void)
	69	{
6819bc2e	70	ircomm = hashbin_new(HB_LOCK);
1da177e4	71	if (ircomm == NULL) {
6c91023d JP	72	net_err_ratelimited("%s(), can't allocate hashbin!\n",
6c91023d JP	73	__func__);
1da177e4 LT	74	return -ENOMEM;
1da177e4 LT	75	}
6819bc2e	76
1da177e4 LT	77	#ifdef CONFIG_PROC_FS
1da177e4 LT	78	{ struct proc_dir_entry *ent;
5e47879f WC	79	ent = proc_create("ircomm", 0, proc_irda, &ircomm_proc_fops);
	80	if (!ent) {
	81	printk(KERN_ERR "ircomm_init: can't create /proc entry!\n");
	82	return -ENODEV;
	83	}
1da177e4 LT	84	}
1da177e4 LT	85	#endif /* CONFIG_PROC_FS */
6819bc2e	86
6c91023d	87	net_info_ratelimited("IrCOMM protocol (Dag Brattli)\n");
6819bc2e	88
1da177e4 LT	89	return 0;
	90	}
	91
	92	static void __exit ircomm_cleanup(void)
	93	{
1da177e4 LT	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
955a9d20 JP	112	pr_debug("%s(), service_type=0x%02x\n", __func__ ,
955a9d20 JP	113	service_type);
1da177e4 LT	114
	115	IRDA_ASSERT(ircomm != NULL, return NULL;);
	116
c17277f7	117	self = kzalloc(sizeof(struct ircomm_cb), GFP_KERNEL);
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	{
1da177e4 LT	156	/* Disconnect link if any */
	157	ircomm_do_event(self, IRCOMM_DISCONNECT_REQUEST, NULL, NULL);
	158
	159	/* Remove TSAP */
	160	if (self->tsap) {
	161	irttp_close_tsap(self->tsap);
	162	self->tsap = NULL;
	163	}
	164
	165	/* Remove LSAP */
	166	if (self->lsap) {
	167	irlmp_close_lsap(self->lsap);
	168	self->lsap = NULL;
	169	}
	170	self->magic = 0;
	171
	172	kfree(self);
	173
	174	return 0;
	175	}
	176
	177	/*
	178	* Function ircomm_close (self)
	179	*
	180	* Closes and removes the specified IrCOMM instance
	181	*
	182	*/
	183	int ircomm_close(struct ircomm_cb *self)
	184	{
	185	struct ircomm_cb *entry;
	186
	187	IRDA_ASSERT(self != NULL, return -EIO;);
	188	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EIO;);
	189
1da177e4 LT	190	entry = hashbin_remove(ircomm, self->line, NULL);
	191
	192	IRDA_ASSERT(entry == self, return -1;);
6819bc2e YH	193
6819bc2e YH	194	return __ircomm_close(self);
1da177e4 LT	195	}
	196
	197	EXPORT_SYMBOL(ircomm_close);
	198
	199	/*
	200	* Function ircomm_connect_request (self, service_type)
	201	*
	202	* Impl. of this function is differ from one of the reference. This
	203	* function does discovery as well as sending connect request
6819bc2e	204	*
1da177e4	205	*/
6819bc2e	206	int ircomm_connect_request(struct ircomm_cb *self, __u8 dlsap_sel,
1da177e4 LT	207	__u32 saddr, __u32 daddr, struct sk_buff *skb,
	208	__u8 service_type)
	209	{
	210	struct ircomm_info info;
	211	int ret;
	212
1da177e4 LT	213	IRDA_ASSERT(self != NULL, return -1;);
	214	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
	215
	216	self->service_type= service_type;
	217
	218	info.dlsap_sel = dlsap_sel;
	219	info.saddr = saddr;
	220	info.daddr = daddr;
	221
	222	ret = ircomm_do_event(self, IRCOMM_CONNECT_REQUEST, skb, &info);
	223
	224	return ret;
	225	}
	226
	227	EXPORT_SYMBOL(ircomm_connect_request);
	228
	229	/*
	230	* Function ircomm_connect_indication (self, qos, skb)
	231	*
	232	* Notify user layer about the incoming connection
	233	*
	234	*/
	235	void ircomm_connect_indication(struct ircomm_cb self, struct sk_buff skb,
	236	struct ircomm_info *info)
	237	{
6819bc2e YH	238	/*
	239	* If there are any data hiding in the control channel, we must
	240	* deliver it first. The side effect is that the control channel
1da177e4 LT	241	* will be removed from the skb
	242	*/
	243	if (self->notify.connect_indication)
6819bc2e	244	self->notify.connect_indication(self->notify.instance, self,
1da177e4 LT	245	info->qos, info->max_data_size,
	246	info->max_header_size, skb);
	247	else {
955a9d20	248	pr_debug("%s(), missing handler\n", __func__);
1da177e4 LT	249	}
	250	}
	251
	252	/*
	253	* Function ircomm_connect_response (self, userdata, max_sdu_size)
	254	*
	255	* User accepts connection
	256	*
	257	*/
	258	int ircomm_connect_response(struct ircomm_cb self, struct sk_buff userdata)
	259	{
	260	int ret;
	261
	262	IRDA_ASSERT(self != NULL, return -1;);
	263	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
	264
1da177e4 LT	265	ret = ircomm_do_event(self, IRCOMM_CONNECT_RESPONSE, userdata, NULL);
	266
	267	return ret;
6819bc2e	268	}
1da177e4 LT	269
	270	EXPORT_SYMBOL(ircomm_connect_response);
	271
	272	/*
	273	* Function connect_confirm (self, skb)
	274	*
	275	* Notify user layer that the link is now connected
	276	*
	277	*/
	278	void ircomm_connect_confirm(struct ircomm_cb self, struct sk_buff skb,
	279	struct ircomm_info *info)
	280	{
1da177e4 LT	281	if (self->notify.connect_confirm )
1da177e4 LT	282	self->notify.connect_confirm(self->notify.instance,
6819bc2e	283	self, info->qos,
1da177e4 LT	284	info->max_data_size,
	285	info->max_header_size, skb);
	286	else {
955a9d20	287	pr_debug("%s(), missing handler\n", __func__);
1da177e4 LT	288	}
	289	}
	290
	291	/*
	292	* Function ircomm_data_request (self, userdata)
	293	*
	294	* Send IrCOMM data to peer device
	295	*
	296	*/
	297	int ircomm_data_request(struct ircomm_cb self, struct sk_buff skb)
	298	{
	299	int ret;
	300
1da177e4 LT	301	IRDA_ASSERT(self != NULL, return -EFAULT;);
	302	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;);
	303	IRDA_ASSERT(skb != NULL, return -EFAULT;);
6819bc2e	304
1da177e4 LT	305	ret = ircomm_do_event(self, IRCOMM_DATA_REQUEST, skb, NULL);
	306
	307	return ret;
	308	}
	309
	310	EXPORT_SYMBOL(ircomm_data_request);
	311
	312	/*
	313	* Function ircomm_data_indication (self, skb)
	314	*
	315	* Data arrived, so deliver it to user
	316	*
	317	*/
	318	void ircomm_data_indication(struct ircomm_cb self, struct sk_buff skb)
6819bc2e	319	{
1da177e4 LT	320	IRDA_ASSERT(skb->len > 0, return;);
	321
	322	if (self->notify.data_indication)
	323	self->notify.data_indication(self->notify.instance, self, skb);
	324	else {
955a9d20	325	pr_debug("%s(), missing handler\n", __func__);
1da177e4 LT	326	}
	327	}
	328
	329	/*
	330	* Function ircomm_process_data (self, skb)
	331	*
	332	* Data arrived which may contain control channel data
	333	*
	334	*/
	335	void ircomm_process_data(struct ircomm_cb self, struct sk_buff skb)
	336	{
	337	int clen;
	338
	339	IRDA_ASSERT(skb->len > 0, return;);
	340
	341	clen = skb->data[0];
	342
5d780cd6 RB	343	/*
	344	* Input validation check: a stir4200/mcp2150 combinations sometimes
	345	* results in frames with clen > remaining packet size. These are
	346	* illegal; if we throw away just this frame then it seems to carry on
	347	* fine
	348	*/
	349	if (unlikely(skb->len < (clen + 1))) {
955a9d20 JP	350	pr_debug("%s() throwing away illegal frame\n",
955a9d20 JP	351	__func__);
5d780cd6 RB	352	return;
	353	}
	354
6819bc2e YH	355	/*
	356	* If there are any data hiding in the control channel, we must
	357	* deliver it first. The side effect is that the control channel
1da177e4 LT	358	* will be removed from the skb
	359	*/
	360	if (clen > 0)
	361	ircomm_control_indication(self, skb, clen);
	362
	363	/* Remove control channel from data channel */
	364	skb_pull(skb, clen+1);
	365
	366	if (skb->len)
6819bc2e	367	ircomm_data_indication(self, skb);
1da177e4	368	else {
955a9d20 JP	369	pr_debug("%s(), data was control info only!\n",
955a9d20 JP	370	__func__);
1da177e4 LT	371	}
	372	}
	373
	374	/*
	375	* Function ircomm_control_request (self, params)
	376	*
	377	* Send control data to peer device
	378	*
	379	*/
	380	int ircomm_control_request(struct ircomm_cb self, struct sk_buff skb)
	381	{
	382	int ret;
6819bc2e	383
1da177e4 LT	384	IRDA_ASSERT(self != NULL, return -EFAULT;);
	385	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;);
	386	IRDA_ASSERT(skb != NULL, return -EFAULT;);
6819bc2e	387
1da177e4 LT	388	ret = ircomm_do_event(self, IRCOMM_CONTROL_REQUEST, skb, NULL);
	389
	390	return ret;
	391	}
	392
	393	EXPORT_SYMBOL(ircomm_control_request);
	394
	395	/*
	396	* Function ircomm_control_indication (self, skb)
	397	*
	398	* Data has arrived on the control channel
	399	*
	400	*/
6819bc2e	401	static void ircomm_control_indication(struct ircomm_cb *self,
1da177e4 LT	402	struct sk_buff *skb, int clen)
1da177e4 LT	403	{
1da177e4 LT	404	/* Use udata for delivering data on the control channel */
	405	if (self->notify.udata_indication) {
	406	struct sk_buff *ctrl_skb;
	407
	408	/* We don't own the skb, so clone it */
	409	ctrl_skb = skb_clone(skb, GFP_ATOMIC);
	410	if (!ctrl_skb)
	411	return;
	412
	413	/* Remove data channel from control channel */
	414	skb_trim(ctrl_skb, clen+1);
6819bc2e YH	415
6819bc2e YH	416	self->notify.udata_indication(self->notify.instance, self,
1da177e4 LT	417	ctrl_skb);
	418
	419	/* Drop reference count -
	420	* see ircomm_tty_control_indication(). */
	421	dev_kfree_skb(ctrl_skb);
	422	} else {
955a9d20	423	pr_debug("%s(), missing handler\n", __func__);
1da177e4 LT	424	}
	425	}
	426
	427	/*
	428	* Function ircomm_disconnect_request (self, userdata, priority)
	429	*
	430	* User layer wants to disconnect the IrCOMM connection
	431	*
	432	*/
	433	int ircomm_disconnect_request(struct ircomm_cb self, struct sk_buff userdata)
	434	{
	435	struct ircomm_info info;
	436	int ret;
	437
1da177e4 LT	438	IRDA_ASSERT(self != NULL, return -1;);
	439	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
	440
6819bc2e	441	ret = ircomm_do_event(self, IRCOMM_DISCONNECT_REQUEST, userdata,
1da177e4 LT	442	&info);
	443	return ret;
	444	}
	445
	446	EXPORT_SYMBOL(ircomm_disconnect_request);
	447
	448	/*
	449	* Function disconnect_indication (self, skb)
	450	*
	451	* Tell user that the link has been disconnected
	452	*
	453	*/
	454	void ircomm_disconnect_indication(struct ircomm_cb self, struct sk_buff skb,
	455	struct ircomm_info *info)
	456	{
1da177e4 LT	457	IRDA_ASSERT(info != NULL, return;);
	458
	459	if (self->notify.disconnect_indication) {
	460	self->notify.disconnect_indication(self->notify.instance, self,
	461	info->reason, skb);
	462	} else {
955a9d20	463	pr_debug("%s(), missing handler\n", __func__);
1da177e4 LT	464	}
	465	}
	466
	467	/*
	468	* Function ircomm_flow_request (self, flow)
	469	*
6819bc2e	470	*
1da177e4 LT	471	*
	472	*/
	473	void ircomm_flow_request(struct ircomm_cb *self, LOCAL_FLOW flow)
	474	{
1da177e4 LT	475	IRDA_ASSERT(self != NULL, return;);
	476	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;);
	477
	478	if (self->service_type == IRCOMM_3_WIRE_RAW)
	479	return;
	480
	481	irttp_flow_request(self->tsap, flow);
	482	}
	483
	484	EXPORT_SYMBOL(ircomm_flow_request);
	485
	486	#ifdef CONFIG_PROC_FS
	487	static void ircomm_seq_start(struct seq_file seq, loff_t *pos)
	488	{
	489	struct ircomm_cb *self;
	490	loff_t off = 0;
	491
	492	spin_lock_irq(&ircomm->hb_spinlock);
	493
	494	for (self = (struct ircomm_cb *) hashbin_get_first(ircomm);
	495	self != NULL;
	496	self = (struct ircomm_cb *) hashbin_get_next(ircomm)) {
	497	if (off++ == *pos)
	498	break;
6819bc2e	499
1da177e4 LT	500	}
	501	return self;
	502	}
	503
	504	static void ircomm_seq_next(struct seq_file seq, void v, loff_t pos)
	505	{
	506	++*pos;
	507
	508	return (void *) hashbin_get_next(ircomm);
	509	}
	510
	511	static void ircomm_seq_stop(struct seq_file seq, void v)
	512	{
	513	spin_unlock_irq(&ircomm->hb_spinlock);
	514	}
	515
	516	static int ircomm_seq_show(struct seq_file seq, void v)
6819bc2e	517	{
1da177e4 LT	518	const struct ircomm_cb *self = v;
	519
	520	IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EINVAL; );
	521
	522	if(self->line < 0x10)
	523	seq_printf(seq, "ircomm%d", self->line);
	524	else
	525	seq_printf(seq, "irlpt%d", self->line - 0x10);
	526
	527	seq_printf(seq,
	528	" state: %s, slsap_sel: %#02x, dlsap_sel: %#02x, mode:",
	529	ircomm_state[ self->state],
6819bc2e	530	self->slsap_sel, self->dlsap_sel);
1da177e4 LT	531
	532	if(self->service_type & IRCOMM_3_WIRE_RAW)
	533	seq_printf(seq, " 3-wire-raw");
	534	if(self->service_type & IRCOMM_3_WIRE)
	535	seq_printf(seq, " 3-wire");
	536	if(self->service_type & IRCOMM_9_WIRE)
	537	seq_printf(seq, " 9-wire");
	538	if(self->service_type & IRCOMM_CENTRONICS)
	539	seq_printf(seq, " Centronics");
	540	seq_putc(seq, '\n');
	541
	542	return 0;
	543	}
	544
56b3d975	545	static const struct seq_operations ircomm_seq_ops = {
1da177e4 LT	546	.start = ircomm_seq_start,
	547	.next = ircomm_seq_next,
	548	.stop = ircomm_seq_stop,
	549	.show = ircomm_seq_show,
	550	};
	551
	552	static int ircomm_seq_open(struct inode inode, struct file file)
	553	{
	554	return seq_open(file, &ircomm_seq_ops);
	555	}
	556	#endif /* CONFIG_PROC_FS */
	557
	558	MODULE_AUTHOR("Dag Brattli <dag@brattli.net>");
	559	MODULE_DESCRIPTION("IrCOMM protocol");
	560	MODULE_LICENSE("GPL");
	561
	562	module_init(ircomm_init);
	563	module_exit(ircomm_cleanup);