1 files changed, 580 insertions, 0 deletions
diff --git a/net/irda/irias_object.c b/net/irda/irias_object.c
new file mode 100644
index 00000000000..6fec428b451
--- /dev/null
+++ b/net/irda/irias_object.c
@@ -0,0 +1,580 @@
+/*********************************************************************
+ *
+ * Filename:      irias_object.c
+ * Version:       0.3
+ * Description:   IAS object database and functions
+ * Status:        Experimental.
+ * Author:        Dag Brattli <dagb@cs.uit.no>
+ * Created at:    Thu Oct  1 22:50:04 1998
+ * Modified at:   Wed Dec 15 11:23:16 1999
+ * Modified by:   Dag Brattli <dagb@cs.uit.no>
+ *
+ *     Copyright (c) 1998-1999 Dag Brattli, All Rights Reserved.
+ *
+ *     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 Tromsų admit liability nor
+ *     provide warranty for any of this software. This material is
+ *     provided "AS-IS" and at no charge.
+ *
+ ********************************************************************/
+
+#include <linux/string.h>
+#include <linux/socket.h>
+#include <linux/module.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/irias_object.h>
+
+hashbin_t *irias_objects;
+
+/*
+ *  Used when a missing value needs to be returned
+ */
+struct ias_value irias_missing = { IAS_MISSING, 0, 0, 0, {0}};
+
+/*
+ * Function strndup (str, max)
+ *
+ *    My own kernel version of strndup!
+ *
+ * Faster, check boundary... Jean II
+ */
+static char *strndup(char *str, int max)
+{
+	char *new_str;
+	int len;
+
+	/* Check string */
+	if (str == NULL)
+		return NULL;
+	/* Check length, truncate */
+	len = strlen(str);
+	if(len > max)
+		len = max;
+
+	/* Allocate new string */
+        new_str = kmalloc(len + 1, GFP_ATOMIC);
+        if (new_str == NULL) {
+		IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
+		return NULL;
+	}
+
+	/* Copy and truncate */
+	memcpy(new_str, str, len);
+	new_str[len] = '\0';
+
+	return new_str;
+}
+
+/*
+ * Function ias_new_object (name, id)
+ *
+ *    Create a new IAS object
+ *
+ */
+struct ias_object *irias_new_object( char *name, int id)
+{
+        struct ias_object *obj;
+
+	IRDA_DEBUG( 4, "%s()\n", __FUNCTION__);
+
+	obj = (struct ias_object *) kmalloc(sizeof(struct ias_object),
+					    GFP_ATOMIC);
+	if (obj == NULL) {
+		IRDA_WARNING("%s(), Unable to allocate object!\n",
+			     __FUNCTION__);
+		return NULL;
+	}
+	memset(obj, 0, sizeof( struct ias_object));
+
+	obj->magic = IAS_OBJECT_MAGIC;
+	obj->name = strndup(name, IAS_MAX_CLASSNAME);
+	obj->id = id;
+
+	/* Locking notes : the attrib spinlock has lower precendence
+	 * than the objects spinlock. Never grap the objects spinlock
+	 * while holding any attrib spinlock (risk of deadlock). Jean II */
+	obj->attribs = hashbin_new(HB_LOCK);
+
+	if (obj->attribs == NULL) {
+		IRDA_WARNING("%s(), Unable to allocate attribs!\n",
+			     __FUNCTION__);
+		kfree(obj);
+		return NULL;
+	}
+
+	return obj;
+}
+EXPORT_SYMBOL(irias_new_object);
+
+/*
+ * Function irias_delete_attrib (attrib)
+ *
+ *    Delete given attribute and deallocate all its memory
+ *
+ */
+static void __irias_delete_attrib(struct ias_attrib *attrib)
+{
+	IRDA_ASSERT(attrib != NULL, return;);
+	IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, return;);
+
+	if (attrib->name)
+		kfree(attrib->name);
+
+	irias_delete_value(attrib->value);
+	attrib->magic = ~IAS_ATTRIB_MAGIC;
+
+	kfree(attrib);
+}
+
+void __irias_delete_object(struct ias_object *obj)
+{
+	IRDA_ASSERT(obj != NULL, return;);
+	IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
+
+	if (obj->name)
+		kfree(obj->name);
+
+	hashbin_delete(obj->attribs, (FREE_FUNC) __irias_delete_attrib);
+
+	obj->magic = ~IAS_OBJECT_MAGIC;
+
+	kfree(obj);
+}
+
+/*
+ * Function irias_delete_object (obj)
+ *
+ *    Remove object from hashbin and deallocate all attributes associated with
+ *    with this object and the object itself
+ *
+ */
+int irias_delete_object(struct ias_object *obj)
+{
+	struct ias_object *node;
+
+	IRDA_ASSERT(obj != NULL, return -1;);
+	IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -1;);
+
+	/* Remove from list */
+	node = hashbin_remove_this(irias_objects, (irda_queue_t *) obj);
+	if (!node)
+		IRDA_DEBUG( 0, "%s(), object already removed!\n",
+			    __FUNCTION__);
+
+	/* Destroy */
+	__irias_delete_object(obj);
+
+	return 0;
+}
+EXPORT_SYMBOL(irias_delete_object);
+
+/*
+ * Function irias_delete_attrib (obj)
+ *
+ *    Remove attribute from hashbin and, if it was the last attribute of
+ *    the object, remove the object as well.
+ *
+ */
+int irias_delete_attrib(struct ias_object *obj, struct ias_attrib *attrib,
+			int cleanobject)
+{
+	struct ias_attrib *node;
+
+	IRDA_ASSERT(obj != NULL, return -1;);
+	IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -1;);
+	IRDA_ASSERT(attrib != NULL, return -1;);
+
+	/* Remove attribute from object */
+	node = hashbin_remove_this(obj->attribs, (irda_queue_t *) attrib);
+	if (!node)
+		return 0; /* Already removed or non-existent */
+
+	/* Deallocate attribute */
+	__irias_delete_attrib(node);
+
+	/* Check if object has still some attributes, destroy it if none.
+	 * At first glance, this look dangerous, as the kernel reference
+	 * various IAS objects. However, we only use this function on
+	 * user attributes, not kernel attributes, so there is no risk
+	 * of deleting a kernel object this way. Jean II */
+	node = (struct ias_attrib *) hashbin_get_first(obj->attribs);
+	if (cleanobject && !node)
+		irias_delete_object(obj);
+
+	return 0;
+}
+
+/*
+ * Function irias_insert_object (obj)
+ *
+ *    Insert an object into the LM-IAS database
+ *
+ */
+void irias_insert_object(struct ias_object *obj)
+{
+	IRDA_ASSERT(obj != NULL, return;);
+	IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
+
+	hashbin_insert(irias_objects, (irda_queue_t *) obj, 0, obj->name);
+}
+EXPORT_SYMBOL(irias_insert_object);
+
+/*
+ * Function irias_find_object (name)
+ *
+ *    Find object with given name
+ *
+ */
+struct ias_object *irias_find_object(char *name)
+{
+	IRDA_ASSERT(name != NULL, return NULL;);
+
+	/* Unsafe (locking), object might change */
+	return hashbin_lock_find(irias_objects, 0, name);
+}
+EXPORT_SYMBOL(irias_find_object);
+
+/*
+ * Function irias_find_attrib (obj, name)
+ *
+ *    Find named attribute in object
+ *
+ */
+struct ias_attrib *irias_find_attrib(struct ias_object *obj, char *name)
+{
+	struct ias_attrib *attrib;
+
+	IRDA_ASSERT(obj != NULL, return NULL;);
+	IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return NULL;);
+	IRDA_ASSERT(name != NULL, return NULL;);
+
+	attrib = hashbin_lock_find(obj->attribs, 0, name);
+	if (attrib == NULL)
+		return NULL;
+
+	/* Unsafe (locking), attrib might change */
+	return attrib;
+}
+EXPORT_SYMBOL(irias_find_attrib);
+
+/*
+ * Function irias_add_attribute (obj, attrib)
+ *
+ *    Add attribute to object
+ *
+ */
+static void irias_add_attrib(struct ias_object *obj, struct ias_attrib *attrib,
+			     int owner)
+{
+	IRDA_ASSERT(obj != NULL, return;);
+	IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
+
+	IRDA_ASSERT(attrib != NULL, return;);
+	IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, return;);
+
+	/* Set if attrib is owned by kernel or user space */
+	attrib->value->owner = owner;
+
+	hashbin_insert(obj->attribs, (irda_queue_t *) attrib, 0, attrib->name);
+}
+
+/*
+ * Function irias_object_change_attribute (obj_name, attrib_name, new_value)
+ *
+ *    Change the value of an objects attribute.
+ *
+ */
+int irias_object_change_attribute(char *obj_name, char *attrib_name,
+				  struct ias_value *new_value)
+{
+	struct ias_object *obj;
+	struct ias_attrib *attrib;
+	unsigned long flags;
+
+	/* Find object */
+	obj = hashbin_lock_find(irias_objects, 0, obj_name);
+	if (obj == NULL) {
+		IRDA_WARNING("%s: Unable to find object: %s\n", __FUNCTION__,
+			     obj_name);
+		return -1;
+	}
+
+	/* Slightly unsafe (obj might get removed under us) */
+	spin_lock_irqsave(&obj->attribs->hb_spinlock, flags);
+
+	/* Find attribute */
+	attrib = hashbin_find(obj->attribs, 0, attrib_name);
+	if (attrib == NULL) {
+		IRDA_WARNING("%s: Unable to find attribute: %s\n",
+			     __FUNCTION__, attrib_name);
+		spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
+		return -1;
+	}
+
+	if ( attrib->value->type != new_value->type) {
+		IRDA_DEBUG( 0, "%s(), changing value type not allowed!\n",
+			    __FUNCTION__);
+		spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
+		return -1;
+	}
+
+	/* Delete old value */
+	irias_delete_value(attrib->value);
+
+	/* Insert new value */
+	attrib->value = new_value;
+
+	/* Success */
+	spin_unlock_irqrestore(&obj->attribs->hb_spinlock, flags);
+	return 0;
+}
+EXPORT_SYMBOL(irias_object_change_attribute);
+
+/*
+ * Function irias_object_add_integer_attrib (obj, name, value)
+ *
+ *    Add an integer attribute to an LM-IAS object
+ *
+ */
+void irias_add_integer_attrib(struct ias_object *obj, char *name, int value,
+			      int owner)
+{
+	struct ias_attrib *attrib;
+
+	IRDA_ASSERT(obj != NULL, return;);
+	IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
+	IRDA_ASSERT(name != NULL, return;);
+
+	attrib = (struct ias_attrib *) kmalloc(sizeof(struct ias_attrib),
+					       GFP_ATOMIC);
+	if (attrib == NULL) {
+		IRDA_WARNING("%s: Unable to allocate attribute!\n",
+			     __FUNCTION__);
+		return;
+	}
+	memset(attrib, 0, sizeof( struct ias_attrib));
+
+	attrib->magic = IAS_ATTRIB_MAGIC;
+	attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
+
+	/* Insert value */
+	attrib->value = irias_new_integer_value(value);
+
+	irias_add_attrib(obj, attrib, owner);
+}
+EXPORT_SYMBOL(irias_add_integer_attrib);
+
+ /*
+ * Function irias_add_octseq_attrib (obj, name, octet_seq, len)
+ *
+ *    Add a octet sequence attribute to an LM-IAS object
+ *
+ */
+
+void irias_add_octseq_attrib(struct ias_object *obj, char *name, __u8 *octets,
+			     int len, int owner)
+{
+	struct ias_attrib *attrib;
+
+	IRDA_ASSERT(obj != NULL, return;);
+	IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
+
+	IRDA_ASSERT(name != NULL, return;);
+	IRDA_ASSERT(octets != NULL, return;);
+
+	attrib = (struct ias_attrib *) kmalloc(sizeof(struct ias_attrib),
+					       GFP_ATOMIC);
+	if (attrib == NULL) {
+		IRDA_WARNING("%s: Unable to allocate attribute!\n",
+			     __FUNCTION__);
+		return;
+	}
+	memset(attrib, 0, sizeof( struct ias_attrib));
+
+	attrib->magic = IAS_ATTRIB_MAGIC;
+	attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
+
+	attrib->value = irias_new_octseq_value( octets, len);
+
+	irias_add_attrib(obj, attrib, owner);
+}
+EXPORT_SYMBOL(irias_add_octseq_attrib);
+
+/*
+ * Function irias_object_add_string_attrib (obj, string)
+ *
+ *    Add a string attribute to an LM-IAS object
+ *
+ */
+void irias_add_string_attrib(struct ias_object *obj, char *name, char *value,
+			     int owner)
+{
+	struct ias_attrib *attrib;
+
+	IRDA_ASSERT(obj != NULL, return;);
+	IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return;);
+
+	IRDA_ASSERT(name != NULL, return;);
+	IRDA_ASSERT(value != NULL, return;);
+
+	attrib = (struct ias_attrib *) kmalloc(sizeof( struct ias_attrib),
+					       GFP_ATOMIC);
+	if (attrib == NULL) {
+		IRDA_WARNING("%s: Unable to allocate attribute!\n",
+			     __FUNCTION__);
+		return;
+	}
+	memset(attrib, 0, sizeof( struct ias_attrib));
+
+	attrib->magic = IAS_ATTRIB_MAGIC;
+	attrib->name = strndup(name, IAS_MAX_ATTRIBNAME);
+
+	attrib->value = irias_new_string_value(value);
+
+	irias_add_attrib(obj, attrib, owner);
+}
+EXPORT_SYMBOL(irias_add_string_attrib);
+
+/*
+ * Function irias_new_integer_value (integer)
+ *
+ *    Create new IAS integer value
+ *
+ */
+struct ias_value *irias_new_integer_value(int integer)
+{
+	struct ias_value *value;
+
+	value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
+	if (value == NULL) {
+		IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
+		return NULL;
+	}
+	memset(value, 0, sizeof(struct ias_value));
+
+	value->type = IAS_INTEGER;
+	value->len = 4;
+	value->t.integer = integer;
+
+	return value;
+}
+EXPORT_SYMBOL(irias_new_integer_value);
+
+/*
+ * Function irias_new_string_value (string)
+ *
+ *    Create new IAS string value
+ *
+ * Per IrLMP 1.1, 4.3.3.2, strings are up to 256 chars - Jean II
+ */
+struct ias_value *irias_new_string_value(char *string)
+{
+	struct ias_value *value;
+
+	value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
+	if (value == NULL) {
+		IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
+		return NULL;
+	}
+	memset( value, 0, sizeof( struct ias_value));
+
+	value->type = IAS_STRING;
+	value->charset = CS_ASCII;
+	value->t.string = strndup(string, IAS_MAX_STRING);
+	value->len = strlen(value->t.string);
+
+	return value;
+}
+EXPORT_SYMBOL(irias_new_string_value);
+
+/*
+ * Function irias_new_octseq_value (octets, len)
+ *
+ *    Create new IAS octet-sequence value
+ *
+ * Per IrLMP 1.1, 4.3.3.2, octet-sequence are up to 1024 bytes - Jean II
+ */
+struct ias_value *irias_new_octseq_value(__u8 *octseq , int len)
+{
+	struct ias_value *value;
+
+	value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
+	if (value == NULL) {
+		IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
+		return NULL;
+	}
+	memset(value, 0, sizeof(struct ias_value));
+
+	value->type = IAS_OCT_SEQ;
+	/* Check length */
+	if(len > IAS_MAX_OCTET_STRING)
+		len = IAS_MAX_OCTET_STRING;
+	value->len = len;
+
+	value->t.oct_seq = kmalloc(len, GFP_ATOMIC);
+	if (value->t.oct_seq == NULL){
+		IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
+		kfree(value);
+		return NULL;
+	}
+	memcpy(value->t.oct_seq, octseq , len);
+	return value;
+}
+EXPORT_SYMBOL(irias_new_octseq_value);
+
+struct ias_value *irias_new_missing_value(void)
+{
+	struct ias_value *value;
+
+	value = kmalloc(sizeof(struct ias_value), GFP_ATOMIC);
+	if (value == NULL) {
+		IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
+		return NULL;
+	}
+	memset(value, 0, sizeof(struct ias_value));
+
+	value->type = IAS_MISSING;
+	value->len = 0;
+
+	return value;
+}
+
+/*
+ * Function irias_delete_value (value)
+ *
+ *    Delete IAS value
+ *
+ */
+void irias_delete_value(struct ias_value *value)
+{
+	IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
+
+	IRDA_ASSERT(value != NULL, return;);
+
+	switch (value->type) {
+	case IAS_INTEGER: /* Fallthrough */
+	case IAS_MISSING:
+		/* No need to deallocate */
+		break;
+	case IAS_STRING:
+		/* If string, deallocate string */
+		if (value->t.string != NULL)
+			kfree(value->t.string);
+		break;
+	case IAS_OCT_SEQ:
+		/* If byte stream, deallocate byte stream */
+		 if (value->t.oct_seq != NULL)
+			 kfree(value->t.oct_seq);
+		 break;
+	default:
+		IRDA_DEBUG(0, "%s(), Unknown value type!\n", __FUNCTION__);
+		break;
+	}
+	kfree(value);
+}
+EXPORT_SYMBOL(irias_delete_value);