fuzzing: Add OpenDHt wrapper

Change-Id: I92e57a1f62e3bae67c8ae4ca6d7654dfe427c361

test/fuzzing/lib/dht.cpp

+/*
+ *  Copyright (C) 2021 Savoir-faire Linux Inc.
+ *
+ *  Author: Olivier Dion <olivier.dion>@savoirfairelinux.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 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, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+ */
+
+#ifdef WIP
+#include <opendht/dhtrunner.h>
+#include <opendht/thread_pool.h>
+#include <opendht/default_types.h>
+
+namespace dht {
+
+__weak
+bool mutate_dht_encrypted_ImMessage(ImMessage& msg)
+{
+        printf("message!\n");
+
+        return false;
+}
+
+/* TODO - Is there a way to not tod without the mangled name?  Use nm(1) for that.  */
+BEGIN_METHOD_WRAPPER(
+        _ZN3dht9DhtRunner12putEncryptedENS_4HashILm20EEES2_St10shared_ptrINS_5ValueEESt8functionIFvbRKSt6vectorIS3_INS_4NodeEESaIS9_EEEEb,
+        void, DhtRunner::putEncrypted, InfoHash hash, InfoHash to, std::shared_ptr<Value> value, DoneCallback cb, bool permanent)
+{
+        if (value->type == ImMessage::TYPE.id) {
+                ImMessage uv = Value::unpack<ImMessage>(value);
+                bool mutated = mutate_dht_encrypted_ImMessage(uv);
+        }
+
+        this_func(this, hash, to, value, cb, permanent);
+
+}
+END_WRAPPER();
+
+};
+#endif