text: /*********************************************************************
   *
   * Filename:      iriap.c
   * Version:       0.8
   * Description:   Information Access Protocol (IAP)
   * Status:        Experimental.
   * Author:        Dag Brattli <dagb@cs.uit.no>
   * Created at:    Thu Aug 21 00:02:07 1997
   * Modified at:   Sat Dec 25 16:42:42 1999
   * Modified by:   Dag Brattli <dagb@cs.uit.no>
   *
   *     Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>,
   *     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.
   *
   *     Neither Dag Brattli nor University of Tromsø admit liability nor
   *     provide warranty for any of this software. This material is
   *     provided "AS-IS" and at no charge.
   *
   ********************************************************************/
  
  #include <linux/module.h>
  #include <linux/types.h>
  #include <linux/skbuff.h>
  #include <linux/fs.h>
  #include <linux/string.h>
  #include <linux/init.h>
  #include <linux/seq_file.h>
  #include <linux/slab.h>
  
  #include <asm/byteorder.h>
  #include <asm/unaligned.h>
  
  #include <net/irda/irda.h>
  #include <net/irda/irttp.h>
  #include <net/irda/irlmp.h>
  #include <net/irda/irias_object.h>
  #include <net/irda/iriap_event.h>
  #include <net/irda/iriap.h>
  
  #ifdef CONFIG_IRDA_DEBUG
  static const char *const ias_charset_types[] = {
  	"CS_ASCII",
  	"CS_ISO_8859_1",
  	"CS_ISO_8859_2",
  	"CS_ISO_8859_3",
  	"CS_ISO_8859_4",
  	"CS_ISO_8859_5",
  	"CS_ISO_8859_6",
  	"CS_ISO_8859_7",
  	"CS_ISO_8859_8",
  	"CS_ISO_8859_9",
  	"CS_UNICODE"
  };
  #endif	/* CONFIG_IRDA_DEBUG */
  
  static hashbin_t *iriap = NULL;
  static void *service_handle;
  
  static void __iriap_close(struct iriap_cb *self);
  static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode);
  static void iriap_disconnect_indication(void *instance, void *sap,
  					LM_REASON reason, struct sk_buff *skb);
  static void iriap_connect_indication(void *instance, void *sap,
  				     struct qos_info *qos, __u32 max_sdu_size,
  				     __u8 max_header_size,
  				     struct sk_buff *skb);
  static void iriap_connect_confirm(void *instance, void *sap,
  				  struct qos_info *qos,
  				  __u32 max_sdu_size, __u8 max_header_size,
  				  struct sk_buff *skb);
  static int iriap_data_indication(void *instance, void *sap,
  				 struct sk_buff *skb);
  
  static void iriap_watchdog_timer_expired(void *data);
  
  static inline void iriap_start_watchdog_timer(struct iriap_cb *self,
  					      int timeout)
  {
  	irda_start_timer(&self->watchdog_timer, timeout, self,
  			 iriap_watchdog_timer_expired);
  }
  
  /*
   * Function iriap_init (void)
   *
   *    Initializes the IrIAP layer, called by the module initialization code
   *    in irmod.c
   */
  int __init iriap_init(void)
  {
  	struct ias_object *obj;
  	struct iriap_cb *server;
  	__u8 oct_seq[6];
  	__u16 hints;
  
  	/* Allocate master array */
  	iriap = hashbin_new(HB_LOCK);
  	if (!iriap)
  		return -ENOMEM;
  
  	/* Object repository - defined in irias_object.c */
  	irias_objects = hashbin_new(HB_LOCK);
  	if (!irias_objects) {
  		IRDA_WARNING("%s: Can't allocate irias_objects hashbin!\n",
  			     __func__);
  		hashbin_delete(iriap, NULL);
  		return -ENOMEM;
  	}
  
  	/*
  	 *  Register some default services for IrLMP
  	 */
  	hints  = irlmp_service_to_hint(S_COMPUTER);
  	service_handle = irlmp_register_service(hints);
  
  	/* Register the Device object with LM-IAS */
  	obj = irias_new_object("Device", IAS_DEVICE_ID);
  	irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR);
  
  	oct_seq[0] = 0x01;  /* Version 1 */
  	oct_seq[1] = 0x00;  /* IAS support bits */
  	oct_seq[2] = 0x00;  /* LM-MUX support bits */
  #ifdef CONFIG_IRDA_ULTRA
  	oct_seq[2] |= 0x04; /* Connectionless Data support */
  #endif
  	irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3,
  				IAS_KERNEL_ATTR);
  	irias_insert_object(obj);
  
  	/*
  	 *  Register server support with IrLMP so we can accept incoming
  	 *  connections
  	 */
  	server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
  	if (!server) {
  		IRDA_DEBUG(0, "%s(), unable to open server\n", __func__);
  		return -1;
  	}
  	iriap_register_lsap(server, LSAP_IAS, IAS_SERVER);
  
  	return 0;
  }
  
  /*
   * Function iriap_cleanup (void)
   *
   *    Initializes the IrIAP layer, called by the module cleanup code in
   *    irmod.c
   */
  void iriap_cleanup(void)
  {
  	irlmp_unregister_service(service_handle);
  
  	hashbin_delete(iriap, (FREE_FUNC) __iriap_close);
  	hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object);
  }
  
  /*
   * Function iriap_open (void)
   *
   *    Opens an instance of the IrIAP layer, and registers with IrLMP
   */
  struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv,
  			    CONFIRM_CALLBACK callback)
  {
  	struct iriap_cb *self;
  
  	IRDA_DEBUG(2, "%s()\n", __func__);
  
  	self = kzalloc(sizeof(*self), GFP_ATOMIC);
  	if (!self) {
  		IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
  		return NULL;
  	}
  
  	/*
  	 *  Initialize instance
  	 */
  
  	self->magic = IAS_MAGIC;
  	self->mode = mode;
  	if (mode == IAS_CLIENT)
  		iriap_register_lsap(self, slsap_sel, mode);
  
  	self->confirm = callback;
  	self->priv = priv;
  
  	/* iriap_getvaluebyclass_request() will construct packets before
  	 * we connect, so this must have a sane value... Jean II */
  	self->max_header_size = LMP_MAX_HEADER;
  
  	init_timer(&self->watchdog_timer);
  
  	hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL);
  
  	/* Initialize state machines */
  	iriap_next_client_state(self, S_DISCONNECT);
  	iriap_next_call_state(self, S_MAKE_CALL);
  	iriap_next_server_state(self, R_DISCONNECT);
  	iriap_next_r_connect_state(self, R_WAITING);
  
  	return self;
  }
  EXPORT_SYMBOL(iriap_open);
  
  /*
   * Function __iriap_close (self)
   *
   *    Removes (deallocates) the IrIAP instance
   *
   */
  static void __iriap_close(struct iriap_cb *self)
  {
  	IRDA_DEBUG(4, "%s()\n", __func__);
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
  
  	del_timer(&self->watchdog_timer);
  
  	if (self->request_skb)
  		dev_kfree_skb(self->request_skb);
  
  	self->magic = 0;
  
  	kfree(self);
  }
  
  /*
   * Function iriap_close (void)
   *
   *    Closes IrIAP and deregisters with IrLMP
   */
  void iriap_close(struct iriap_cb *self)
  {
  	struct iriap_cb *entry;
  
  	IRDA_DEBUG(2, "%s()\n", __func__);
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
  
  	if (self->lsap) {
  		irlmp_close_lsap(self->lsap);
  		self->lsap = NULL;
  	}
  
  	entry = (struct iriap_cb *) hashbin_remove(iriap, (long) self, NULL);
  	IRDA_ASSERT(entry == self, return;);
  
  	__iriap_close(self);
  }
  EXPORT_SYMBOL(iriap_close);
  
  static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode)
  {
  	notify_t notify;
  
  	IRDA_DEBUG(2, "%s()\n", __func__);
  
  	irda_notify_init(&notify);
  	notify.connect_confirm       = iriap_connect_confirm;
  	notify.connect_indication    = iriap_connect_indication;
  	notify.disconnect_indication = iriap_disconnect_indication;
  	notify.data_indication       = iriap_data_indication;
  	notify.instance = self;
  	if (mode == IAS_CLIENT)
  		strcpy(notify.name, "IrIAS cli");
  	else
  		strcpy(notify.name, "IrIAS srv");
  
  	self->lsap = irlmp_open_lsap(slsap_sel, &notify, 0);
  	if (self->lsap == NULL) {
  		IRDA_ERROR("%s: Unable to allocated LSAP!\n", __func__);
  		return -1;
  	}
  	self->slsap_sel = self->lsap->slsap_sel;
  
  	return 0;
  }
  
  /*
   * Function iriap_disconnect_indication (handle, reason)
   *
   *    Got disconnect, so clean up everything associated with this connection
   *
   */
  static void iriap_disconnect_indication(void *instance, void *sap,
  					LM_REASON reason,
  					struct sk_buff *skb)
  {
  	struct iriap_cb *self;
  
  	IRDA_DEBUG(4, "%s(), reason=%s\n", __func__, irlmp_reasons[reason]);
  
  	self = (struct iriap_cb *) instance;
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
  
  	IRDA_ASSERT(iriap != NULL, return;);
  
  	del_timer(&self->watchdog_timer);
  
  	/* Not needed */
  	if (skb)
  		dev_kfree_skb(skb);
  
  	if (self->mode == IAS_CLIENT) {
  		IRDA_DEBUG(4, "%s(), disconnect as client\n", __func__);
  
  
  		iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION,
  				      NULL);
  		/*
  		 * Inform service user that the request failed by sending
  		 * it a NULL value. Warning, the client might close us, so
  		 * remember no to use self anymore after calling confirm
  		 */
  		if (self->confirm)
  			self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
  	} else {
  		IRDA_DEBUG(4, "%s(), disconnect as server\n", __func__);
  		iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION,
  				      NULL);
  		iriap_close(self);
  	}
  }
  
  /*
   * Function iriap_disconnect_request (handle)
   */
  static void iriap_disconnect_request(struct iriap_cb *self)
  {
  	struct sk_buff *tx_skb;
  
  	IRDA_DEBUG(4, "%s()\n", __func__);
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
  
  	tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
  	if (tx_skb == NULL) {
  		IRDA_DEBUG(0,
  			   "%s(), Could not allocate an sk_buff of length %d\n",
  			   __func__, LMP_MAX_HEADER);
  		return;
  	}
  
  	/*
  	 *  Reserve space for MUX control and LAP header
  	 */
  	skb_reserve(tx_skb, LMP_MAX_HEADER);
  
  	irlmp_disconnect_request(self->lsap, tx_skb);
  }
  
  /*
   * Function iriap_getvaluebyclass (addr, name, attr)
   *
   *    Retrieve all values from attribute in all objects with given class
   *    name
   */
  int iriap_getvaluebyclass_request(struct iriap_cb *self,
  				  __u32 saddr, __u32 daddr,
  				  char *name, char *attr)
  {
  	struct sk_buff *tx_skb;
  	int name_len, attr_len, skb_len;
  	__u8 *frame;
  
  	IRDA_ASSERT(self != NULL, return -1;);
  	IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
  
  	/* Client must supply the destination device address */
  	if (!daddr)
  		return -1;
  
  	self->daddr = daddr;
  	self->saddr = saddr;
  
  	/*
  	 *  Save operation, so we know what the later indication is about
  	 */
  	self->operation = GET_VALUE_BY_CLASS;
  
  	/* Give ourselves 10 secs to finish this operation */
  	iriap_start_watchdog_timer(self, 10*HZ);
  
  	name_len = strlen(name);	/* Up to IAS_MAX_CLASSNAME = 60 */
  	attr_len = strlen(attr);	/* Up to IAS_MAX_ATTRIBNAME = 60 */
  
  	skb_len = self->max_header_size+2+name_len+1+attr_len+4;
  	tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
  	if (!tx_skb)
  		return -ENOMEM;
  
  	/* Reserve space for MUX and LAP header */
  	skb_reserve(tx_skb, self->max_header_size);
  	skb_put(tx_skb, 3+name_len+attr_len);
  	frame = tx_skb->data;
  
  	/* Build frame */
  	frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
  	frame[1] = name_len;                       /* Insert length of name */
  	memcpy(frame+2, name, name_len);           /* Insert name */
  	frame[2+name_len] = attr_len;              /* Insert length of attr */
  	memcpy(frame+3+name_len, attr, attr_len);  /* Insert attr */
  
  	iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
  
  	/* Drop reference count - see state_s_disconnect(). */
  	dev_kfree_skb(tx_skb);
  
  	return 0;
  }
  EXPORT_SYMBOL(iriap_getvaluebyclass_request);
  
  /*
   * Function iriap_getvaluebyclass_confirm (self, skb)
   *
   *    Got result from GetValueByClass command. Parse it and return result
   *    to service user.
   *
   */
  static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
  					  struct sk_buff *skb)
  {
  	struct ias_value *value;
  	int charset;
  	__u32 value_len;
  	__u32 tmp_cpu32;
  	__u16 obj_id;
  	__u16 len;
  	__u8  type;
  	__u8 *fp;
  	int n;
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
  	IRDA_ASSERT(skb != NULL, return;);
  
  	/* Initialize variables */
  	fp = skb->data;
  	n = 2;
  
  	/* Get length, MSB first */
  	len = get_unaligned_be16(fp + n);
  	n += 2;
  
  	IRDA_DEBUG(4, "%s(), len=%d\n", __func__, len);
  
  	/* Get object ID, MSB first */
  	obj_id = get_unaligned_be16(fp + n);
  	n += 2;
  
  	type = fp[n++];
  	IRDA_DEBUG(4, "%s(), Value type = %d\n", __func__, type);
  
  	switch (type) {
  	case IAS_INTEGER:
  		memcpy(&tmp_cpu32, fp+n, 4); n += 4;
  		be32_to_cpus(&tmp_cpu32);
  		value = irias_new_integer_value(tmp_cpu32);
  
  		/*  Legal values restricted to 0x01-0x6f, page 15 irttp */
  		IRDA_DEBUG(4, "%s(), lsap=%d\n", __func__, value->t.integer);
  		break;
  	case IAS_STRING:
  		charset = fp[n++];
  
  		switch (charset) {
  		case CS_ASCII:
  			break;
  /*		case CS_ISO_8859_1: */
  /*		case CS_ISO_8859_2: */
  /*		case CS_ISO_8859_3: */
  /*		case CS_ISO_8859_4: */
  /*		case CS_ISO_8859_5: */
  /*		case CS_ISO_8859_6: */
  /*		case CS_ISO_8859_7: */
  /*		case CS_ISO_8859_8: */
  /*		case CS_ISO_8859_9: */
  /*		case CS_UNICODE: */
  		default:
  			IRDA_DEBUG(0, "%s(), charset %s, not supported\n",
  				   __func__, ias_charset_types[charset]);
  
  			/* Aborting, close connection! */
  			iriap_disconnect_request(self);
  			return;
  			/* break; */
  		}
  		value_len = fp[n++];
  		IRDA_DEBUG(4, "%s(), strlen=%d\n", __func__, value_len);
  
  		/* Make sure the string is null-terminated */
  		if (n + value_len < skb->len)
  			fp[n + value_len] = 0x00;
  		IRDA_DEBUG(4, "Got string %s\n", fp+n);
  
  		/* Will truncate to IAS_MAX_STRING bytes */
  		value = irias_new_string_value(fp+n);
  		break;
  	case IAS_OCT_SEQ:
  		value_len = get_unaligned_be16(fp + n);
  		n += 2;
  
  		/* Will truncate to IAS_MAX_OCTET_STRING bytes */
  		value = irias_new_octseq_value(fp+n, value_len);
  		break;
  	default:
  		value = irias_new_missing_value();
  		break;
  	}
  
  	/* Finished, close connection! */
  	iriap_disconnect_request(self);
  
  	/* Warning, the client might close us, so remember no to use self
  	 * anymore after calling confirm
  	 */
  	if (self->confirm)
  		self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
  	else {
  		IRDA_DEBUG(0, "%s(), missing handler!\n", __func__);
  		irias_delete_value(value);
  	}
  }
  
  /*
   * Function iriap_getvaluebyclass_response ()
   *
   *    Send answer back to remote LM-IAS
   *
   */
  static void iriap_getvaluebyclass_response(struct iriap_cb *self,
  					   __u16 obj_id,
  					   __u8 ret_code,
  					   struct ias_value *value)
  {
  	struct sk_buff *tx_skb;
  	int n;
  	__be32 tmp_be32;
  	__be16 tmp_be16;
  	__u8 *fp;
  
  	IRDA_DEBUG(4, "%s()\n", __func__);
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
  	IRDA_ASSERT(value != NULL, return;);
  	IRDA_ASSERT(value->len <= 1024, return;);
  
  	/* Initialize variables */
  	n = 0;
  
  	/*
  	 *  We must adjust the size of the response after the length of the
  	 *  value. We add 32 bytes because of the 6 bytes for the frame and
  	 *  max 5 bytes for the value coding.
  	 */
  	tx_skb = alloc_skb(value->len + self->max_header_size + 32,
  			   GFP_ATOMIC);
  	if (!tx_skb)
  		return;
  
  	/* Reserve space for MUX and LAP header */
  	skb_reserve(tx_skb, self->max_header_size);
  	skb_put(tx_skb, 6);
  
  	fp = tx_skb->data;
  
  	/* Build frame */
  	fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
  	fp[n++] = ret_code;
  
  	/* Insert list length (MSB first) */
  	tmp_be16 = htons(0x0001);
  	memcpy(fp+n, &tmp_be16, 2);  n += 2;
  
  	/* Insert object identifier ( MSB first) */
  	tmp_be16 = cpu_to_be16(obj_id);
  	memcpy(fp+n, &tmp_be16, 2); n += 2;
  
  	switch (value->type) {
  	case IAS_STRING:
  		skb_put(tx_skb, 3 + value->len);
  		fp[n++] = value->type;
  		fp[n++] = 0; /* ASCII */
  		fp[n++] = (__u8) value->len;
  		memcpy(fp+n, value->t.string, value->len); n+=value->len;
  		break;
  	case IAS_INTEGER:
  		skb_put(tx_skb, 5);
  		fp[n++] = value->type;
  
  		tmp_be32 = cpu_to_be32(value->t.integer);
  		memcpy(fp+n, &tmp_be32, 4); n += 4;
  		break;
  	case IAS_OCT_SEQ:
  		skb_put(tx_skb, 3 + value->len);
  		fp[n++] = value->type;
  
  		tmp_be16 = cpu_to_be16(value->len);
  		memcpy(fp+n, &tmp_be16, 2); n += 2;
  		memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
  		break;
  	case IAS_MISSING:
  		IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __func__);
  		skb_put(tx_skb, 1);
  		fp[n++] = value->type;
  		break;
  	default:
  		IRDA_DEBUG(0, "%s(), type not implemented!\n", __func__);
  		break;
  	}
  	iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
  
  	/* Drop reference count - see state_r_execute(). */
  	dev_kfree_skb(tx_skb);
  }
  
  /*
   * Function iriap_getvaluebyclass_indication (self, skb)
   *
   *    getvaluebyclass is requested from peer LM-IAS
   *
   */
  static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
  					     struct sk_buff *skb)
  {
  	struct ias_object *obj;
  	struct ias_attrib *attrib;
  	int name_len;
  	int attr_len;
  	char name[IAS_MAX_CLASSNAME + 1];	/* 60 bytes */
  	char attr[IAS_MAX_ATTRIBNAME + 1];	/* 60 bytes */
  	__u8 *fp;
  	int n;
  
  	IRDA_DEBUG(4, "%s()\n", __func__);
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
  	IRDA_ASSERT(skb != NULL, return;);
  
  	fp = skb->data;
  	n = 1;
  
  	name_len = fp[n++];
  	memcpy(name, fp+n, name_len); n+=name_len;
  	name[name_len] = '\0';
  
  	attr_len = fp[n++];
  	memcpy(attr, fp+n, attr_len); n+=attr_len;
  	attr[attr_len] = '\0';
  
  	IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
  	obj = irias_find_object(name);
  
  	if (obj == NULL) {
  		IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
  		iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
  					       &irias_missing);
  		return;
  	}
  	IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
  
  	attrib = irias_find_attrib(obj, attr);
  	if (attrib == NULL) {
  		IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
  		iriap_getvaluebyclass_response(self, obj->id,
  					       IAS_ATTRIB_UNKNOWN,
  					       &irias_missing);
  		return;
  	}
  
  	/* We have a match; send the value.  */
  	iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
  				       attrib->value);
  }
  
  /*
   * Function iriap_send_ack (void)
   *
   *    Currently not used
   *
   */
  void iriap_send_ack(struct iriap_cb *self)
  {
  	struct sk_buff *tx_skb;
  	__u8 *frame;
  
  	IRDA_DEBUG(2, "%s()\n", __func__);
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
  
  	tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC);
  	if (!tx_skb)
  		return;
  
  	/* Reserve space for MUX and LAP header */
  	skb_reserve(tx_skb, self->max_header_size);
  	skb_put(tx_skb, 1);
  	frame = tx_skb->data;
  
  	/* Build frame */
  	frame[0] = IAP_LST | IAP_ACK | self->operation;
  
  	irlmp_data_request(self->lsap, tx_skb);
  }
  
  void iriap_connect_request(struct iriap_cb *self)
  {
  	int ret;
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
  
  	ret = irlmp_connect_request(self->lsap, LSAP_IAS,
  				    self->saddr, self->daddr,
  				    NULL, NULL);
  	if (ret < 0) {
  		IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
  		self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
  	}
  }
  
  /*
   * Function iriap_connect_confirm (handle, skb)
   *
   *    LSAP connection confirmed!
   *
   */
  static void iriap_connect_confirm(void *instance, void *sap,
  				  struct qos_info *qos, __u32 max_seg_size,
  				  __u8 max_header_size,
  				  struct sk_buff *skb)
  {
  	struct iriap_cb *self;
  
  	self = (struct iriap_cb *) instance;
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
  	IRDA_ASSERT(skb != NULL, return;);
  
  	self->max_data_size = max_seg_size;
  	self->max_header_size = max_header_size;
  
  	del_timer(&self->watchdog_timer);
  
  	iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
  
  	/* Drop reference count - see state_s_make_call(). */
  	dev_kfree_skb(skb);
  }
  
  /*
   * Function iriap_connect_indication ( handle, skb)
   *
   *    Remote LM-IAS is requesting connection
   *
   */
  static void iriap_connect_indication(void *instance, void *sap,
  				     struct qos_info *qos, __u32 max_seg_size,
  				     __u8 max_header_size,
  				     struct sk_buff *skb)
  {
  	struct iriap_cb *self, *new;
  
  	IRDA_DEBUG(1, "%s()\n", __func__);
  
  	self = (struct iriap_cb *) instance;
  
  	IRDA_ASSERT(skb != NULL, return;);
  	IRDA_ASSERT(self != NULL, goto out;);
  	IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
  
  	/* Start new server */
  	new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
  	if (!new) {
  		IRDA_DEBUG(0, "%s(), open failed\n", __func__);
  		goto out;
  	}
  
  	/* Now attach up the new "socket" */
  	new->lsap = irlmp_dup(self->lsap, new);
  	if (!new->lsap) {
  		IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
  		goto out;
  	}
  
  	new->max_data_size = max_seg_size;
  	new->max_header_size = max_header_size;
  
  	/* Clean up the original one to keep it in listen state */
  	irlmp_listen(self->lsap);
  
  	iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
  
  out:
  	/* Drop reference count - see state_r_disconnect(). */
  	dev_kfree_skb(skb);
  }
  
  /*
   * Function iriap_data_indication (handle, skb)
   *
   *    Receives data from connection identified by handle from IrLMP
   *
   */
  static int iriap_data_indication(void *instance, void *sap,
  				 struct sk_buff *skb)
  {
  	struct iriap_cb *self;
  	__u8  *frame;
  	__u8  opcode;
  
  	IRDA_DEBUG(3, "%s()\n", __func__);
  
  	self = (struct iriap_cb *) instance;
  
  	IRDA_ASSERT(skb != NULL, return 0;);
  	IRDA_ASSERT(self != NULL, goto out;);
  	IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
  
  	frame = skb->data;
  
  	if (self->mode == IAS_SERVER) {
  		/* Call server */
  		IRDA_DEBUG(4, "%s(), Calling server!\n", __func__);
  		iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
  		goto out;
  	}
  	opcode = frame[0];
  	if (~opcode & IAP_LST) {
  		IRDA_WARNING("%s:, IrIAS multiframe commands or "
  			     "results is not implemented yet!\n",
  			     __func__);
  		goto out;
  	}
  
  	/* Check for ack frames since they don't contain any data */
  	if (opcode & IAP_ACK) {
  		IRDA_DEBUG(0, "%s() Got ack frame!\n", __func__);
  		goto out;
  	}
  
  	opcode &= ~IAP_LST; /* Mask away LST bit */
  
  	switch (opcode) {
  	case GET_INFO_BASE:
  		IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
  		break;
  	case GET_VALUE_BY_CLASS:
  		iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
  
  		switch (frame[1]) {
  		case IAS_SUCCESS:
  			iriap_getvaluebyclass_confirm(self, skb);
  			break;
  		case IAS_CLASS_UNKNOWN:
  			IRDA_DEBUG(1, "%s(), No such class!\n", __func__);
  			/* Finished, close connection! */
  			iriap_disconnect_request(self);
  
  			/*
  			 * Warning, the client might close us, so remember
  			 * no to use self anymore after calling confirm
  			 */
  			if (self->confirm)
  				self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
  					      self->priv);
  			break;
  		case IAS_ATTRIB_UNKNOWN:
  			IRDA_DEBUG(1, "%s(), No such attribute!\n", __func__);
  			/* Finished, close connection! */
  			iriap_disconnect_request(self);
  
  			/*
  			 * Warning, the client might close us, so remember
  			 * no to use self anymore after calling confirm
  			 */
  			if (self->confirm)
  				self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
  					      self->priv);
  			break;
  		}
  		break;
  	default:
  		IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __func__,
  			   opcode);
  		break;
  	}
  
  out:
  	/* Cleanup - sub-calls will have done skb_get() as needed. */
  	dev_kfree_skb(skb);
  	return 0;
  }
  
  /*
   * Function iriap_call_indication (self, skb)
   *
   *    Received call to server from peer LM-IAS
   *
   */
  void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
  {
  	__u8 *fp;
  	__u8 opcode;
  
  	IRDA_DEBUG(4, "%s()\n", __func__);
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
  	IRDA_ASSERT(skb != NULL, return;);
  
  	fp = skb->data;
  
  	opcode = fp[0];
  	if (~opcode & 0x80) {
  		IRDA_WARNING("%s: IrIAS multiframe commands or results "
  			     "is not implemented yet!\n", __func__);
  		return;
  	}
  	opcode &= 0x7f; /* Mask away LST bit */
  
  	switch (opcode) {
  	case GET_INFO_BASE:
  		IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
  			     __func__);
  		break;
  	case GET_VALUE_BY_CLASS:
  		iriap_getvaluebyclass_indication(self, skb);
  		break;
  	}
  	/* skb will be cleaned up in iriap_data_indication */
  }
  
  /*
   * Function iriap_watchdog_timer_expired (data)
   *
   *    Query has taken too long time, so abort
   *
   */
  static void iriap_watchdog_timer_expired(void *data)
  {
  	struct iriap_cb *self = (struct iriap_cb *) data;
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
  
  	/* iriap_close(self); */
  }
  
  #ifdef CONFIG_PROC_FS
  
  static const char *const ias_value_types[] = {
  	"IAS_MISSING",
  	"IAS_INTEGER",
  	"IAS_OCT_SEQ",
  	"IAS_STRING"
  };
  
  static inline struct ias_object *irias_seq_idx(loff_t pos)
  {
  	struct ias_object *obj;
  
  	for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
  	     obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
  		if (pos-- == 0)
  			break;
  	}
  
  	return obj;
  }
  
  static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
  {
  	spin_lock_irq(&irias_objects->hb_spinlock);
  
  	return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
  }
  
  static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
  {
  	++*pos;
  
  	return (v == SEQ_START_TOKEN)
  		? (void *) hashbin_get_first(irias_objects)
  		: (void *) hashbin_get_next(irias_objects);
  }
  
  static void irias_seq_stop(struct seq_file *seq, void *v)
  {
  	spin_unlock_irq(&irias_objects->hb_spinlock);
  }
  
  static int irias_seq_show(struct seq_file *seq, void *v)
  {
  	if (v == SEQ_START_TOKEN)
  		seq_puts(seq, "LM-IAS Objects:\n");
  	else {
  		struct ias_object *obj = v;
  		struct ias_attrib *attrib;
  
  		IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
  
  		seq_printf(seq, "name: %s, id=%d\n",
  			   obj->name, obj->id);
  
  		/* Careful for priority inversions here !
  		 * All other uses of attrib spinlock are independent of
  		 * the object spinlock, so we are safe. Jean II */
  		spin_lock(&obj->attribs->hb_spinlock);
  
  		/* List all attributes for this object */
  		for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
  		     attrib != NULL;
  		     attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
  
  			IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
  				    goto outloop; );
  
  			seq_printf(seq, " - Attribute name: \"%s\", ",
  				   attrib->name);
  			seq_printf(seq, "value[%s]: ",
  				   ias_value_types[attrib->value->type]);
  
  			switch (attrib->value->type) {
  			case IAS_INTEGER:
  				seq_printf(seq, "%d\n",
  					   attrib->value->t.integer);
  				break;
  			case IAS_STRING:
  				seq_printf(seq, "\"%s\"\n",
  					   attrib->value->t.string);
  				break;
  			case IAS_OCT_SEQ:
  				seq_printf(seq, "octet sequence (%d bytes)\n",
  					   attrib->value->len);
  				break;
  			case IAS_MISSING:
  				seq_puts(seq, "missing\n");
  				break;
  			default:
  				seq_printf(seq, "type %d?\n",
  					   attrib->value->type);
  			}
  			seq_putc(seq, '\n');
  
  		}
  	IRDA_ASSERT_LABEL(outloop:)
  		spin_unlock(&obj->attribs->hb_spinlock);
  	}
  
  	return 0;
  }
  
  static const struct seq_operations irias_seq_ops = {
  	.start  = irias_seq_start,
  	.next   = irias_seq_next,
  	.stop   = irias_seq_stop,
  	.show   = irias_seq_show,
  };
  
  static int irias_seq_open(struct inode *inode, struct file *file)
  {
  	IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
  
  	return seq_open(file, &irias_seq_ops);
  }
  
  const struct file_operations irias_seq_fops = {
  	.owner		= THIS_MODULE,
  	.open           = irias_seq_open,
  	.read           = seq_read,
  	.llseek         = seq_lseek,
  	.release	= seq_release,
  };
  
  #endif /* PROC_FS */
  