Run UPnP discovery in the background

.github/workflows/c-cpp.yml

@@ -251,10 +251,9 @@ jobs:
     strategy:
       matrix:
         config:
-          - {vs: Visual Studio 16 2019, os: 2019, msbuild: "C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Enterprise\\MSBuild\\Current\\Bin\\amd64\\", rx: "ON"}
+          - {vs: Visual Studio 16 2019, os: 2019, msbuild: "C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Enterprise\\MSBuild\\Current\\Bin\\amd64\\", rx: "ON", upnp: "ON"}
-          - {vs: Visual Studio 16 2019, os: 2019, msbuild: "C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Enterprise\\MSBuild\\Current\\Bin\\amd64\\", rx: "OFF"}
+          - {vs: Visual Studio 16 2019, os: 2019, msbuild: "C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Enterprise\\MSBuild\\Current\\Bin\\amd64\\", rx: "OFF", upnp: "ON"}
-          #- {vs: Visual Studio 17 2022, os: 2022, msbuild: "C:\\Program Files\\Microsoft Visual Studio\\2022\\Enterprise\\Msbuild\\Current\\Bin\\amd64\\", rx: "ON"}
+          - {vs: Visual Studio 16 2019, os: 2019, msbuild: "C:\\Program Files (x86)\\Microsoft Visual Studio\\2019\\Enterprise\\MSBuild\\Current\\Bin\\amd64\\", rx: "OFF", upnp: "OFF"}
-          #- {vs: Visual Studio 17 2022, os: 2022, msbuild: "C:\\Program Files\\Microsoft Visual Studio\\2022\\Enterprise\\Msbuild\\Current\\Bin\\amd64\\", rx: "OFF"}
 
     steps:
     - name: Checkout repository
@@ -269,7 +268,7 @@ jobs:
       run: |
         mkdir build
         cd build
-        cmake .. -G "${{ matrix.config.vs }}" -DWITH_RANDOMX=${{ matrix.config.rx }}
+        cmake .. -G "${{ matrix.config.vs }}" -DWITH_RANDOMX=${{ matrix.config.rx }} -DWITH_UPNP=${{ matrix.config.upnp }}
         & "${{ matrix.config.msbuild }}msbuild" /m /p:Configuration=Release p2pool.vcxproj
 
     - name: Build tests
@@ -288,7 +287,7 @@ jobs:
     - name: Archive binary
       uses: actions/upload-artifact@v3
       with:
-        name: p2pool-msbuild-${{ matrix.config.os }}-randomx-${{ matrix.config.rx }}.exe
+        name: p2pool-msbuild-${{ matrix.config.os }}-randomx-${{ matrix.config.rx }}-upnp-${{ matrix.config.upnp }}.exe
         path: build/Release/p2pool.exe
 
   build-macos:

.github/workflows/test-sync.yml

@@ -24,7 +24,7 @@ jobs:
       run: |
         mkdir build
         cd build
-        cmake .. -DWITH_UPNP=OFF -DDEV_TEST_SYNC=ON -DCMAKE_C_COMPILER=gcc-12 -DCMAKE_CXX_COMPILER=g++-12
+        cmake .. -DDEV_TEST_SYNC=ON -DCMAKE_C_COMPILER=gcc-12 -DCMAKE_CXX_COMPILER=g++-12
         make -j$(nproc)
 
     - name: Run p2pool
@@ -60,7 +60,7 @@ jobs:
       run: |
         mkdir build
         cd build
-        cmake .. -DWITH_UPNP=OFF -DDEV_TEST_SYNC=ON
+        cmake .. -DDEV_TEST_SYNC=ON
         make -j3
 
     - name: Run p2pool
@@ -96,7 +96,7 @@ jobs:
       run: |
         mkdir build
         cd build
-        cmake .. -G "Visual Studio 17 2022" -DWITH_UPNP=OFF -DDEV_TEST_SYNC=ON
+        cmake .. -G "Visual Studio 17 2022" -DDEV_TEST_SYNC=ON
         & "C:\\Program Files\\Microsoft Visual Studio\\2022\\Enterprise\\Msbuild\\Current\\Bin\\amd64\\msbuild" /m /p:Configuration=Debug p2pool.vcxproj
 
     - name: Run p2pool

src/p2pool.cpp

@@ -60,6 +60,12 @@ p2pool::p2pool(int argc, char* argv[])
 {
 	LOGINFO(1, log::LightCyan() << VERSION);
 
+#ifdef WITH_UPNP
+	if (m_params->m_upnp) {
+		init_upnp();
+	}
+#endif
+
 	if (!m_params->m_wallet.valid()) {
 		LOGERR(1, "Invalid wallet address. Try \"p2pool --help\".");
 		throw std::exception();
@@ -189,6 +195,12 @@ p2pool::p2pool(int argc, char* argv[])
 
 p2pool::~p2pool()
 {
+#ifdef WITH_UPNP
+	if (m_params->m_upnp) {
+		destroy_upnp();
+	}
+#endif
+
 	uv_rwlock_destroy(&m_mainchainLock);
 	uv_rwlock_destroy(&m_minerDataLock);
 	uv_mutex_destroy(&m_foundBlocksLock);

src/util.cpp

@@ -568,17 +568,58 @@ UV_LoopUserData* GetLoopUserData(uv_loop_t* loop, bool create)
 #ifdef WITH_UPNP
 static struct UPnP_Discover
 {
-	UPnP_Discover() { devlist = upnpDiscover(1000, nullptr, nullptr, UPNP_LOCAL_PORT_ANY, 0, 2, &error); }
+	uv_mutex_t lock;
-	~UPnP_Discover() { freeUPNPDevlist(devlist); }
-
 	int error;
 	UPNPDev* devlist;
 } upnp_discover;
 
+void init_upnp()
+{
+	uv_mutex_init_checked(&upnp_discover.lock);
+
+	uv_work_t* req = new uv_work_t{};
+
+	const int err = uv_queue_work(uv_default_loop_checked(), req,
+		[](uv_work_t* /*req*/)
+		{
+			BACKGROUND_JOB_START(init_upnp);
+			LOGINFO(1, "UPnP: Started scanning for UPnP IGD devices");
+			{
+				MutexLock lock(upnp_discover.lock);
+				upnp_discover.devlist = upnpDiscover(1000, nullptr, nullptr, UPNP_LOCAL_PORT_ANY, 0, 2, &upnp_discover.error);
+			}
+			LOGINFO(1, "UPnP: Finished scanning for UPnP IGD devices");
+		},
+		[](uv_work_t* req, int /*status*/)
+		{
+			delete req;
+			BACKGROUND_JOB_STOP(init_upnp);
+		}
+	);
+
+	if (err) {
+		LOGERR(0, "init_upnp: uv_queue_work failed, error " << uv_err_name(err));
+		delete req;
+	}
+}
+
+void destroy_upnp()
+{
+	{
+		MutexLock lock(upnp_discover.lock);
+
+		freeUPNPDevlist(upnp_discover.devlist);
+		upnp_discover.devlist = nullptr;
+	}
+	uv_mutex_destroy(&upnp_discover.lock);
+}
+
 void add_portmapping(int external_port, int internal_port)
 {
 	LOGINFO(1, "UPnP: trying to map WAN:" << external_port << " to LAN:" << internal_port);
 
+	MutexLock lock(upnp_discover.lock);
+
 	if (!upnp_discover.devlist) {
 		LOGWARN(1, "upnpDiscover: no UPnP IGD devices found, error " << upnp_discover.error);
 		return;

src/util.h

@@ -247,6 +247,8 @@ bool str_to_ip(bool is_v6, const char* ip, raw_ip& result);
 bool is_localhost(const std::string& host);
 
 #ifdef WITH_UPNP
+void init_upnp();
+void destroy_upnp();
 void add_portmapping(int external_port, int internal_port);
 #endif