[net] add fallback to InternetGetConnectedState() when INetworkListManager service dependencies are missing

* INetworkListManager appears to depend on specific services to be able to work,
  which one can actually disable while still getting full Internet connectivity.
* If that is the case, HRESULT_FROM_WIN32(ERROR_SERVICE_DEPENDENCY_FAIL) will be
  returned, therefore we add a fallback to using InternetGetConnectedState(), which
  does not have such dependencies (but has other limitations per b2492908be)
  when we detect a dependency error.
* Also take this opportunity to switch to using INetworkListManager::get_IsConnectedToInternet().
* Also fix Coverity breakage due to Synopsys having upgraded their toolchain.
* Closes #1801

.github/workflows/coverity.yml

@@ -49,7 +49,9 @@ jobs:
         msbuild-architecture: x64
 
     - name: Build with Coverity
-      run: cov-build.exe --dir cov-int msbuild ${{ env.SOLUTION_FILE_PATH }} /m /p:Configuration=${{ env.BUILD_CONFIGURATION }},Platform=${{ env.TARGET_PLATFORM }}
+      run: | 
+        cov-configure --msvc
+        cov-build.exe --dir cov-int msbuild ${{ env.SOLUTION_FILE_PATH }} /m /p:Configuration=${{ env.BUILD_CONFIGURATION }},Platform=${{ env.TARGET_PLATFORM }}
 
     - name: Publish Coverity artifacts
       uses: actions/upload-artifact@v2

src/net.c

@@ -57,6 +57,10 @@ static DWORD error_code, fido_len = 0;
 static BOOL force_update_check = FALSE;
 static const char* request_headers = "Accept-Encoding: gzip, deflate";
 
+#if defined(__MINGW32__)
+#define INetworkListManager_get_IsConnectedToInternet INetworkListManager_IsConnectedToInternet
+#endif
+
 /*
  * FormatMessage does not handle internet errors
  * https://docs.microsoft.com/en-us/windows/desktop/wininet/wininet-errors
@@ -267,16 +271,18 @@ static HINTERNET GetInternetSession(BOOL bRetry)
 	int i;
 	char agent[64];
 	BOOL decodingSupport = TRUE;
-	DWORD dwTimeout = NET_SESSION_TIMEOUT, dwProtocolSupport = HTTP_PROTOCOL_FLAG_HTTP2;
+	VARIANT_BOOL InternetConnection = VARIANT_FALSE;
+	DWORD dwFlags, dwTimeout = NET_SESSION_TIMEOUT, dwProtocolSupport = HTTP_PROTOCOL_FLAG_HTTP2;
 	HINTERNET hSession = NULL;
 	HRESULT hr = S_FALSE;
 	INetworkListManager* pNetworkListManager;
-	NLM_CONNECTIVITY Connectivity = NLM_CONNECTIVITY_DISCONNECTED;
 
 	PF_TYPE_DECL(WINAPI, HINTERNET, InternetOpenA, (LPCSTR, DWORD, LPCSTR, LPCSTR, DWORD));
 	PF_TYPE_DECL(WINAPI, BOOL, InternetSetOptionA, (HINTERNET, DWORD, LPVOID, DWORD));
+	PF_TYPE_DECL(WINAPI, BOOL, InternetGetConnectedState, (LPDWORD, DWORD));
 	PF_INIT_OR_OUT(InternetOpenA, WinInet);
 	PF_INIT_OR_OUT(InternetSetOptionA, WinInet);
+	PF_INIT(InternetGetConnectedState, WinInet);
 
 	// Create a NetworkListManager Instance to check the network connection
 	IGNORE_RETVAL(CoInitializeEx(NULL, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE));
@@ -284,13 +290,20 @@ static HINTERNET GetInternetSession(BOOL bRetry)
 		&IID_INetworkListManager, (LPVOID*)&pNetworkListManager);
 	if (hr == S_OK) {
 		for (i = 0; i <= WRITE_RETRIES; i++) {
-			hr = INetworkListManager_GetConnectivity(pNetworkListManager, &Connectivity);
+			hr = INetworkListManager_get_IsConnectedToInternet(pNetworkListManager, &InternetConnection);
+			// INetworkListManager may fail with ERROR_SERVICE_DEPENDENCY_FAIL if the DHCP service
+			// is not running, in which case we must fall back to using InternetGetConnectedState().
+			// See https://github.com/pbatard/rufus/issues/1801.
+			if ((hr == HRESULT_FROM_WIN32(ERROR_SERVICE_DEPENDENCY_FAIL)) && (pfInternetGetConnectedState != NULL)) {
+				InternetConnection = pfInternetGetConnectedState(&dwFlags, 0) ? VARIANT_TRUE : VARIANT_FALSE;
+				break;
+			}
 			if (hr == S_OK || !bRetry)
 				break;
 			Sleep(1000);
 		}
 	}
-	if (Connectivity == NLM_CONNECTIVITY_DISCONNECTED) {
+	if (InternetConnection == VARIANT_FALSE) {
 		SetLastError(ERROR_INTERNET_DISCONNECTED);
 		goto out;
 	}

src/rufus.rc

@@ -33,7 +33,7 @@ LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
 IDD_DIALOG DIALOGEX 12, 12, 232, 326
 STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
 EXSTYLE WS_EX_ACCEPTFILES
-CAPTION "Rufus 3.18.1871"
+CAPTION "Rufus 3.18.1872"
 FONT 9, "Segoe UI Symbol", 400, 0, 0x0
 BEGIN
     LTEXT           "Drive Properties",IDS_DRIVE_PROPERTIES_TXT,8,6,53,12,NOT WS_GROUP
@@ -395,8 +395,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 3,18,1871,0
+ FILEVERSION 3,18,1872,0
- PRODUCTVERSION 3,18,1871,0
+ PRODUCTVERSION 3,18,1872,0
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -414,13 +414,13 @@ BEGIN
             VALUE "Comments", "https://rufus.ie"
             VALUE "CompanyName", "Akeo Consulting"
             VALUE "FileDescription", "Rufus"
-            VALUE "FileVersion", "3.18.1871"
+            VALUE "FileVersion", "3.18.1872"
             VALUE "InternalName", "Rufus"
             VALUE "LegalCopyright", "© 2011-2022 Pete Batard (GPL v3)"
             VALUE "LegalTrademarks", "https://www.gnu.org/licenses/gpl-3.0.html"
             VALUE "OriginalFilename", "rufus-3.18.exe"
             VALUE "ProductName", "Rufus"
-            VALUE "ProductVersion", "3.18.1871"
+            VALUE "ProductVersion", "3.18.1872"
         END
     END
     BLOCK "VarFileInfo"