Added JNI code for construction/destruction of ZT1_Node objects

Signed-off-by: Grant Limberg <glimberg@gmail.com>

java/jni/com_zerotierone_sdk_Node.cpp

@@ -0,0 +1,298 @@
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2015  ZeroTier, Inc.
+ *
+ * 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 3 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/>.
+ *
+ * --
+ *
+ * ZeroTier may be used and distributed under the terms of the GPLv3, which
+ * are available at: http://www.gnu.org/licenses/gpl-3.0.html
+ *
+ * If you would like to embed ZeroTier into a commercial application or
+ * redistribute it in a modified binary form, please contact ZeroTier Networks
+ * LLC. Start here: http://www.zerotier.com/
+ */
+
+#include <jni.h>
+
+#include <ZeroTierOne.h>
+
+#include <map>
+#include <assert.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+namespace {
+
+	struct JniRef
+	{
+		JniRef()
+			: env(NULL)
+			, node(NULL)
+			, dataStoreGetListener(NULL)
+			, dataStorePutListener(NULL)
+			, packetSender(NULL)
+			, frameListener(NULL)
+			, configListener(NULL)
+		{}
+		uint64_t id;
+
+		JNIEnv *env;
+
+		ZT1_Node *node;
+
+		jobject dataStoreGetListener;
+		jobject dataStorePutListener;
+		jobject packetSender;
+		jobject frameListener;
+		jobject configListener;
+	};
+
+
+	int VirtualNetworkConfigFunctionCallback(ZT1_Node *node,void *userData,uint64_t,enum ZT1_VirtualNetworkConfigOperation,const ZT1_VirtualNetworkConfig *)
+	{
+		JniRef *ref = (JniRef*)userData;
+		assert(ref->node == node);
+
+		JNIEnv *env = ref->env;
+
+		return 0;
+	}
+
+	void VirtualNetworkFrameFunctionCallback(ZT1_Node *node,void *userData,uint64_t,uint64_t,uint64_t,unsigned int,unsigned int,const void *,unsigned int)
+	{
+		JniRef *ref = (JniRef*)userData;
+		assert(ref->node == node);
+
+		JNIEnv *env = ref->env;
+	}
+
+	void EventCallback(ZT1_Node *node,void *userData,enum ZT1_Event,const void *)
+	{
+		JniRef *ref = (JniRef*)userData;
+		assert(ref->node == node);
+
+		JNIEnv *env = ref->env;
+	}
+
+	long DataStoreGetFunction(ZT1_Node *node,void *userData,const char *,void *,unsigned long,unsigned long,unsigned long *)
+	{
+		JniRef *ref = (JniRef*)userData;
+		assert(ref->node == node);
+
+		JNIEnv *env = ref->env;
+
+		return 0;
+	}
+
+	int DataStorePutFunction(ZT1_Node *node,void *userData,const char *,const void *,unsigned long,int)
+	{
+		JniRef *ref = (JniRef*)userData;
+		assert(ref->node == node);
+
+		JNIEnv *env = ref->env;
+
+		return 0;
+	}
+
+	int WirePacketSendFunction(ZT1_Node *node,void *userData,const struct sockaddr_storage *,unsigned int,const void *,unsigned int)
+	{
+		JniRef *ref = (JniRef*)userData;
+		assert(ref->node == node);
+
+		JNIEnv *env = ref->env;
+
+		return 0;
+	}
+
+	typedef std::map<uint64_t, JniRef*> NodeMap;
+	static NodeMap nodeMap;
+
+	jobject createResultObject(JNIEnv *env, ZT1_ResultCode code)
+	{
+		// cache the class and constructor so we don't have to
+		// look them up every time we need to create a java
+		// ResultCode object
+		static jclass resultClass = NULL;
+		static jmethodID constructorId = NULL;
+
+		jobject resultObject = NULL;
+
+		if(resultClass == NULL)
+		{
+			resultClass = env->FindClass("com/zerotierone/sdk/ResultCode");
+			if(resultClass == NULL)
+			{
+				return NULL; // exception thrown
+			}
+		}
+
+		if(constructorId = NULL)
+		{
+			constructorId = env->GetMethodID(resultClass, "<init>", "(I)V");
+			if(constructorId == NULL)
+			{
+				return NULL; // exception thrown
+			}
+		}
+
+		resultObject = env->NewObject(resultClass, constructorId, (jlong)code);
+
+		return resultObject;
+	}
+}
+
+/*
+ * Class:     com_zerotierone_sdk_Node
+ * Method:    node_init
+ * Signature: (J)Lcom/zerotierone/sdk/ResultCode;
+ */
+JNIEXPORT jobject JNICALL Java_com_zerotierone_sdk_Node_node_1init
+  (JNIEnv *env, jobject obj, jlong now)
+{
+	jobject resultObject = createResultObject(env, ZT1_RESULT_OK);
+
+	ZT1_Node *node;
+	JniRef *ref = new JniRef;
+
+	ZT1_ResultCode rc = ZT1_Node_new(
+		&node,
+		ref,
+		(uint64_t)now,
+		&DataStoreGetFunction,
+		&DataStorePutFunction,
+		&WirePacketSendFunction,
+		&VirtualNetworkFrameFunctionCallback,
+		&VirtualNetworkConfigFunctionCallback,
+		&EventCallback);
+
+	if(rc != ZT1_RESULT_OK)
+	{
+		resultObject = createResultObject(env, rc);
+		if(node)
+		{
+			ZT1_Node_delete(node);
+			node = NULL;
+		}
+		delete ref;
+		ref = NULL;
+		return resultObject;
+	}
+
+	
+	ref->id = (uint64_t)now;
+	ref->env = env;
+	ref->node = node;
+
+	jclass cls = env->GetObjectClass(obj);
+	jfieldID fid = env->GetFieldID(
+		cls, "getListener", "Lcom.zerotierone.sdk.DataStoreGetListener;");
+
+	if(fid == NULL)
+	{
+		return NULL; // exception already thrown
+	}
+
+	ref->dataStoreGetListener = env->GetObjectField(obj, fid);
+	if(ref->dataStoreGetListener == NULL)
+	{
+		return NULL;
+	}
+
+	fid = env->GetFieldID(
+		cls, "putListener", "Lcom.zerotierone.sdk.DataStorePutLisetner;");
+
+	if(fid == NULL)
+	{
+		return NULL; // exception already thrown
+	}
+
+	ref->dataStorePutListener = env->GetObjectField(obj, fid);
+	if(ref->dataStorePutListener == NULL)
+	{
+		return NULL;
+	}
+
+	fid = env->GetFieldID(
+		cls, "sender", "Lcom.zerotierone.sdk.PacketSender;");
+	if(fid == NULL)
+	{
+		return NULL; // exception already thrown
+	}
+
+	ref->packetSender = env->GetObjectField(obj, fid);
+	if(ref->packetSender == NULL)
+	{
+		return NULL;
+	}
+
+	fid = env->GetFieldID(
+		cls, "frameListener", "Lcom.zerotierone.sdk.VirtualNetworkFrameListener;");
+	if(fid == NULL)
+	{
+		return NULL; // exception already thrown
+	}
+
+	ref->frameListener = env->GetObjectField(obj, fid);
+	if(ref->frameListener = NULL)
+	{
+		return NULL;
+	}
+
+	fid = env->GetFieldID(
+		cls, "configListener", "Lcom.zerotierone.sdk.VirtualNetworkConfigListener;");
+	if(fid == NULL)
+	{
+		return NULL; // exception already thrown
+	}
+
+	ref->configListener = env->GetObjectField(obj, fid);
+	if(ref->configListener == NULL)
+	{
+		return NULL;
+	}
+
+	nodeMap.insert(std::make_pair(ref->id, ref));
+
+	return resultObject;
+}
+
+/*
+ * Class:     com_zerotierone_sdk_Node
+ * Method:    node_delete
+ * Signature: (J)V
+ */
+JNIEXPORT void JNICALL Java_com_zerotierone_sdk_Node_node_1delete
+  (JNIEnv *env, jobject obj, jlong id)
+{
+	uint64_t nodeId = (uint64_t)id;
+
+	NodeMap::iterator found = nodeMap.find(nodeId);
+	if(found != nodeMap.end())
+	{
+		JniRef *ref = found->second;
+		nodeMap.erase(found);
+		delete ref;
+		ref = NULL;
+	}
+}
+
+
+
+#ifdef __cplusplus
+} // extern "C"
+#endif