should work on hardcoded port (not tested)

plugins/CMakeLists.txt

@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.9...3.24 FATAL_ERROR)
+
+########################################
+
+add_library(plugin_tox_upnp SHARED
+	./plugin_tox_upnp.cpp
+)
+target_compile_features(plugin_tox_upnp PUBLIC cxx_std_17)
+target_link_libraries(plugin_tox_upnp PUBLIC
+	solanaceae_tox_upnp
+	solanaceae_plugin
+)
+

plugins/plugin_tox_upnp.cpp

@@ -0,0 +1,58 @@
+#include <solanaceae/plugin/solana_plugin_v1.h>
+
+#include <solanaceae/tox_upnp.hpp>
+
+#include <memory>
+#include <limits>
+#include <iostream>
+
+static std::unique_ptr<ToxUPnP> g_tox_upnp = nullptr;
+
+constexpr const char* plugin_name = "ToxUPnP";
+
+extern "C" {
+
+SOLANA_PLUGIN_EXPORT const char* solana_plugin_get_name(void) {
+	return plugin_name;
+}
+
+SOLANA_PLUGIN_EXPORT uint32_t solana_plugin_get_version(void) {
+	return SOLANA_PLUGIN_VERSION;
+}
+
+SOLANA_PLUGIN_EXPORT uint32_t solana_plugin_start(struct SolanaAPI* solana_api) {
+	std::cout << "PLUGIN " << plugin_name << " START()\n";
+
+	if (solana_api == nullptr) {
+		return 1;
+	}
+
+	try {
+		// TODO: toxI
+
+		// static store, could be anywhere tho
+		// construct with fetched dependencies
+		g_tox_upnp = std::make_unique<ToxUPnP>();
+
+		// register types
+		PLUG_PROVIDE_INSTANCE(ToxUPnP, plugin_name, g_tox_upnp.get());
+	} catch (const ResolveException& e) {
+		std::cerr << "PLUGIN " << plugin_name << " " << e.what << "\n";
+		return 2;
+	}
+
+	return 0;
+}
+
+SOLANA_PLUGIN_EXPORT void solana_plugin_stop(void) {
+	std::cout << "PLUGIN " << plugin_name << " STOP()\n";
+
+	g_tox_upnp.reset();
+}
+
+SOLANA_PLUGIN_EXPORT float solana_plugin_tick(float) {
+	return std::numeric_limits<float>::max();
+}
+
+} // extern C
+