Diff: BTstack/remote_device_db_memory.c

Revision:

0:1ed23ab1345f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BTstack/remote_device_db_memory.c	Tue Jun 26 14:27:45 2012 +0000
@@ -0,0 +1,198 @@
+/*
+ * Copyright (C) 2009-2012 by Matthias Ringwald
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ * 4. Any redistribution, use, or modification is done solely for
+ *    personal benefit and not for any commercial purpose or for
+ *    monetary gain.
+ *
+ * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
+ * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+ * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * Please inquire about commercial licensing options at btstack@ringwald.ch
+ *
+ */
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "remote_device_db.h"
+#include "btstack_memory.h"
+#include "debug.h"
+
+#include <btstack/utils.h>
+#include <btstack/linked_list.h>
+
+// This lists should be only accessed by tests.
+linked_list_t db_mem_link_keys = NULL;
+linked_list_t db_mem_names = NULL;
+static linked_list_t db_mem_services = NULL;
+
+// Device info
+static void db_open(void){
+}
+
+static void db_close(void){ 
+}
+
+static db_mem_device_t * get_item(linked_list_t list, bd_addr_t *bd_addr) {
+    linked_item_t *it;
+    for (it = (linked_item_t *) list; it ; it = it->next){
+        db_mem_device_t * item = (db_mem_device_t *) it;
+        if (BD_ADDR_CMP(item->bd_addr, *bd_addr) == 0) {
+            return item;
+        }
+    }
+    return NULL;
+}
+
+static int get_name(bd_addr_t *bd_addr, device_name_t *device_name) {
+    db_mem_device_name_t * item = (db_mem_device_name_t *) get_item(db_mem_names, bd_addr);
+    
+    if (!item) return 0;
+    
+    strncpy((char*)device_name, item->device_name, MAX_NAME_LEN);
+    
+	linked_list_remove(&db_mem_names, (linked_item_t *) item);
+    linked_list_add(&db_mem_names, (linked_item_t *) item);
+	
+	return 1;
+}
+
+static int get_link_key(bd_addr_t *bd_addr, link_key_t *link_key) {
+    db_mem_device_link_key_t * item = (db_mem_device_link_key_t *) get_item(db_mem_link_keys, bd_addr);
+    
+    if (!item) return 0;
+    
+    memcpy(link_key, item->link_key, LINK_KEY_LEN);
+    
+	linked_list_remove(&db_mem_link_keys, (linked_item_t *) item);
+    linked_list_add(&db_mem_link_keys, (linked_item_t *) item);
+
+	return 1;
+}
+
+static void delete_link_key(bd_addr_t *bd_addr){
+    db_mem_device_t * item = get_item(db_mem_link_keys, bd_addr);
+    
+    if (!item) return;
+    
+    linked_list_remove(&db_mem_link_keys, (linked_item_t *) item);
+    btstack_memory_db_mem_device_link_key_free(item);
+}
+
+
+static void put_link_key(bd_addr_t *bd_addr, link_key_t *link_key){
+    db_mem_device_link_key_t * existingRecord = (db_mem_device_link_key_t *) get_item(db_mem_link_keys, bd_addr);
+    
+    if (existingRecord){
+        memcpy(existingRecord->link_key, link_key, LINK_KEY_LEN);
+        return;
+    }
+    
+    // Record not found, create new one for this device
+    db_mem_device_link_key_t * newItem = (db_mem_device_link_key_t*) btstack_memory_db_mem_device_link_key_get();
+    if (!newItem){
+        newItem = (db_mem_device_link_key_t*)linked_list_get_last_item(&db_mem_link_keys);
+    }
+    
+    if (!newItem) return;
+    
+    memcpy(newItem->device.bd_addr, bd_addr, sizeof(bd_addr_t));
+    memcpy(newItem->link_key, link_key, LINK_KEY_LEN);
+    linked_list_add(&db_mem_link_keys, (linked_item_t *) newItem);
+}
+
+static void delete_name(bd_addr_t *bd_addr){
+    db_mem_device_t * item = get_item(db_mem_names, bd_addr);
+    
+    if (!item) return;
+    
+    linked_list_remove(&db_mem_names, (linked_item_t *) item);
+    btstack_memory_db_mem_device_name_free(item);    
+}
+
+static void put_name(bd_addr_t *bd_addr, device_name_t *device_name){
+    db_mem_device_name_t * existingRecord = (db_mem_device_name_t *) get_item(db_mem_names, bd_addr);
+    
+    if (existingRecord){
+        strncpy(existingRecord->device_name, (const char*) device_name, MAX_NAME_LEN);
+        return;
+    }
+    
+    // Record not found, create a new one for this device
+    db_mem_device_name_t * newItem = (db_mem_device_name_t *) btstack_memory_db_mem_device_name_get();
+    if (!newItem) {
+        newItem = (db_mem_device_name_t*)linked_list_get_last_item(&db_mem_names);
+    };
+
+    if (!newItem) return;
+    
+    memcpy(newItem->device.bd_addr, bd_addr, sizeof(bd_addr_t));
+    strncpy(newItem->device_name, (const char*) device_name, MAX_NAME_LEN);
+    linked_list_add(&db_mem_names, (linked_item_t *) newItem);
+}
+
+
+// MARK: PERSISTENT RFCOMM CHANNEL ALLOCATION
+
+static uint8_t persistent_rfcomm_channel(char *serviceName){
+    linked_item_t *it;
+    db_mem_service_t * item;
+    uint8_t max_channel = 1;
+
+    for (it = (linked_item_t *) db_mem_services; it ; it = it->next){
+        item = (db_mem_service_t *) it;
+        if (strncmp(item->service_name, serviceName, MAX_NAME_LEN) == 0) {
+            // Match found
+            return item->channel;
+        }
+
+        // TODO prevent overflow
+        if (item->channel >= max_channel) max_channel = item->channel + 1;
+    }
+
+    // Allocate new persistant channel
+    db_mem_service_t * newItem = (db_mem_service_t *) btstack_memory_db_mem_service_get();
+
+    if (!newItem) return 0;
+    
+    strncpy(newItem->service_name, serviceName, MAX_NAME_LEN);
+    newItem->channel = max_channel;
+    linked_list_add(&db_mem_services, (linked_item_t *) newItem);
+    return max_channel;
+}
+
+
+const remote_device_db_t remote_device_db_memory = {
+    db_open,
+    db_close,
+    get_link_key,
+    put_link_key,
+    delete_link_key,
+    get_name,
+    put_name,
+    delete_name,
+    persistent_rfcomm_channel
+};