drop Qt discovery of best IP address in favor of pure WINAPI method (with wireless detection)

src/gui/CMakeLists.txt

@@ -6,17 +6,25 @@ set (CMAKE_AUTORCC ON)
 set (CMAKE_AUTOUIC ON)
 set (CMAKE_INCLUDE_CURRENT_DIR ON)
 
-file (GLOB GUI_SOURCE_FILES src/*.cpp src/*.h)
-file (GLOB GUI_UI_FILES src/*.ui)
-
 if (WIN32)
-    set (GUI_RC_FILES res/win/Barrier.rc)
+    set (resources res/win/Barrier.rc)
+    set (arch "win32")
+else()
+    set (arch "unix")
+endif()
+
+file (GLOB sources src/*.cpp src/${arch}/*.cpp)
+file (GLOB headers src/*.h src/${arch}/*.h)
+file (GLOB designs src/*.ui)
+
+if (BARRIER_ADD_HEADERS)
+    list (APPEND sources ${headers})
 endif()
 
 add_executable (barrier WIN32
-    ${GUI_SOURCE_FILES}
-    ${GUI_UI_FILES}
-    ${GUI_RC_FILES}
+    ${sources}
+    ${designs}
+    ${resources}
     res/Barrier.qrc
 )
 
@@ -32,7 +40,7 @@ if (WIN32)
                   HINTS ENV BONJOUR_SDK_HOME
                   PATH_SUFFIXES "Lib/x64")
     set_target_properties (barrier PROPERTIES LINK_FLAGS "/NODEFAULTLIB:LIBCMT")
-    target_link_libraries (barrier ${DNSSD_LIB})
+    target_link_libraries (barrier ${DNSSD_LIB} Ws2_32.lib Iphlpapi.lib)
 elseif (APPLE)
     find_library(APPSERVICES_LIB ApplicationServices)
     target_link_libraries(barrier ${APPSERVICES_LIB})

src/gui/src/ZeroconfService.cpp

@@ -30,8 +30,7 @@
 #ifdef _WIN32
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
-#include <wlanapi.h>
-#pragma comment(lib, "wlanapi.lib")
+#include "win32/DefaultInterfaceIP.h"
 #else
 #include <stdlib.h>
 #endif
@@ -120,75 +119,27 @@ void ZeroconfService::errorHandle(DNSServiceErrorType errorCode)
         tr("Error code: %1.").arg(errorCode));
 }
 
-#ifdef _WIN32
-static QString mac_to_string(DOT11_MAC_ADDRESS mac)
-{
-    char str[18];
-    snprintf(str, 18, "%.2X:%.2X:%.2X:%.2X:%.2X:%.2X",
-        mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
-    return str;
-}
-
-static QList<QString> wireless_mac_strings()
-{
-    QList<QString> wlanMAC;
-    DWORD version;
-    HANDLE client;
-    if (WlanOpenHandle(2, NULL, &version, &client) == 0) {
-        WLAN_INTERFACE_INFO_LIST * list;
-        if (WlanEnumInterfaces(client, NULL, &list) == 0) {
-            for (DWORD idx = 0; idx < list->dwNumberOfItems; ++idx) {
-                const GUID * PGuid = &(list->InterfaceInfo[0].InterfaceGuid);
-                const WLAN_INTF_OPCODE OpCode = wlan_intf_opcode_current_connection;
-                WLAN_CONNECTION_ATTRIBUTES * attrs;
-                DWORD attrsSz;
-                if (WlanQueryInterface(client, PGuid, OpCode, NULL, &attrsSz,
-                    (void**)&attrs, NULL) == 0) {
-                    wlanMAC.append(mac_to_string(
-                        attrs->wlanAssociationAttributes.dot11Bssid));
-                    WlanFreeMemory(attrs);
-                }
-            }
-            WlanFreeMemory(list);
-        }
-        WlanCloseHandle(client, NULL);
-    }
-    return wlanMAC;
-}
-#else
-static QList<QString> wireless_mac_strings()
-{
-    // TODO
-    return QList<QString>();
-}
-#endif
-
 QString ZeroconfService::getLocalIPAddresses()
 {
+#ifdef _WIN32
+    return QString::fromStdString(Debauchee::default_interface_ip());
+#else
     const QString NonEthernetMAC = "00:00:00:00:00:00";
-    const auto wlanMAC = wireless_mac_strings();
-    QString wirelessIP = "";
     foreach(const auto qni, QNetworkInterface::allInterfaces()) {
         // weed out loopback, inactive, and non-ethernet interfaces
         if (!qni.flags().testFlag(QNetworkInterface::IsLoopBack) &&
             qni.flags().testFlag(QNetworkInterface::IsUp) &&
             qni.hardwareAddress() != NonEthernetMAC) {
-            bool isWireless = wlanMAC.contains(qni.hardwareAddress().toUpper());
             foreach(const auto address, qni.allAddresses()) {
                 if (address.protocol() == QAbstractSocket::IPv4Protocol) {
-                    // use the first non-wireless address we find
-                    if (!isWireless)
+                    // use the first address we find
                     return address.toString();
-                    // save the first wireless address we find
-                    if (wirelessIP.isEmpty())
-                        wirelessIP = address.toString();
                 }
             }
         }
     }
-    // if no non-wireless address could be found use a wireless one
-    // if one was found. otherwise return an empty string
-    return wirelessIP;
+    return "";
+#endif
 }
 
 bool ZeroconfService::registerService(bool server)

src/gui/src/main.cpp

@@ -67,6 +67,13 @@ int main(int argc, char* argv[])
     /* Workaround for QTBUG-40332 - "High ping when QNetworkAccessManager is instantiated" */
     ::setenv ("QT_BEARER_POLL_TIMEOUT", "-1", 1);
 #endif
+
+#if _WIN32
+    // winsock needs to be initialized for DefaultInterfaceIP
+    WSADATA wd;
+    WSAStartup(MAKEWORD(2, 0), &wd);
+#endif
+
 	QCoreApplication::setOrganizationName("Debauchee");
 	QCoreApplication::setOrganizationDomain("github.com");
 	QCoreApplication::setApplicationName("Barrier");

src/gui/src/win32/DefaultInterfaceIP.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#include <string>
+
+namespace Debauchee
+{
+
+std::string default_interface_ip();
+
+}

src/gui/src/win32/HeapResource.h

@@ -0,0 +1,48 @@
+#pragma once
+
+namespace Debauchee
+{
+
+template<class T>
+class HeapResource
+{
+public:
+    explicit HeapResource(HANDLE heap, DWORD flags, SIZE_T sz) :
+        _heap(heap),
+        _flags(flags),
+        _mem((T*)HeapAlloc(heap, flags, sz))
+    {
+    }
+
+    HeapResource(HeapResource<T>&& other)
+        : _mem(NULL)
+    {
+        swap(*this, other);
+    }
+
+    ~HeapResource()
+    {
+        if (is_valid()) {
+            HeapFree(_heap, _flags, _mem);
+        }
+    }
+
+    friend void swap(HeapResource<T>& first, HeapResource<T>& second)
+    {
+        using std::swap;
+        swap(first._heap, second._heap);
+        swap(first._flags, second._flags);
+        swap(first._mem, second._mem);
+    }
+
+    bool is_valid() const { return _mem != NULL; }
+
+    operator T*() const { return _mem; }
+
+private:
+    HANDLE _heap;
+    DWORD _flags;
+    T * _mem;
+};
+
+}