/*

 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include "jni.h"

#include "jni_util.h"

#include "proxy_util.h"

jclass proxy_class;

jclass isaddr_class;

jclass ptype_class;

jmethodID isaddr_createUnresolvedID;

jmethodID proxy_ctrID;

jfieldID pr_no_proxyID;

jfieldID ptype_httpID;

jfieldID ptype_socksID;

int initJavaClass(JNIEnv *env) {

    jclass proxy_cls = NULL;

    jclass ptype_cls = NULL;

    jclass isaddr_cls = NULL;

    // Proxy initialization

    proxy_cls = (*env)->FindClass(env,"java/net/Proxy");

    CHECK_NULL_RETURN(proxy_cls, 0);

    proxy_class = (*env)->NewGlobalRef(env, proxy_cls);

    CHECK_NULL_RETURN(proxy_class, 0);

    proxy_ctrID = (*env)->GetMethodID(env, proxy_class, "<init>",

            "(Ljava/net/Proxy$Type;Ljava/net/SocketAddress;)V");

    CHECK_NULL_RETURN(proxy_ctrID, 0);

    // Proxy$Type initialization

    ptype_cls = (*env)->FindClass(env,"java/net/Proxy$Type");

    CHECK_NULL_RETURN(ptype_cls, 0);

    ptype_class = (*env)->NewGlobalRef(env, ptype_cls);

    CHECK_NULL_RETURN(ptype_class, 0);

    ptype_httpID = (*env)->GetStaticFieldID(env, ptype_class, "HTTP",

                                            "Ljava/net/Proxy$Type;");

    CHECK_NULL_RETURN(ptype_httpID, 0);

    ptype_socksID = (*env)->GetStaticFieldID(env, ptype_class, "SOCKS",

                                             "Ljava/net/Proxy$Type;");

    CHECK_NULL_RETURN(ptype_socksID, 0);

    // NO_PROXY

    pr_no_proxyID = (*env)->GetStaticFieldID(env, proxy_class, "NO_PROXY",

                                             "Ljava/net/Proxy;");

    CHECK_NULL_RETURN(pr_no_proxyID, 0);

    // InetSocketAddress initialization

    isaddr_cls = (*env)->FindClass(env, "java/net/InetSocketAddress");

    CHECK_NULL_RETURN(isaddr_cls, 0);

    isaddr_class = (*env)->NewGlobalRef(env, isaddr_cls);

    CHECK_NULL_RETURN(isaddr_class, 0);

    isaddr_createUnresolvedID = (*env)->GetStaticMethodID(env, isaddr_class,

            "createUnresolved",

            "(Ljava/lang/String;I)Ljava/net/InetSocketAddress;");

    return isaddr_createUnresolvedID != NULL ? 1 : 0;

}

jobject createProxy(JNIEnv *env, jfieldID ptype_ID, const char* phost, unsigned short pport) {

    jobject jProxy = NULL;

    jobject type_proxy = NULL;

    type_proxy = (*env)->GetStaticObjectField(env, ptype_class, ptype_ID);

    if (type_proxy) {

        jstring jhost = NULL;

        jhost = (*env)->NewStringUTF(env, phost);

        if (jhost) {

            jobject isa = NULL;

            isa = (*env)->CallStaticObjectMethod(env, isaddr_class,

                    isaddr_createUnresolvedID, jhost, pport);

            if (isa) {

                jProxy = (*env)->NewObject(env, proxy_class, proxy_ctrID,

                                          type_proxy, isa);

            }

        }

    }

    return jProxy;

}