start differenciating between direct and indirect LAN modes.

indirect mode will use regular sockets and not pcap.

src/libui_sdl/LAN_PCap.h

@@ -0,0 +1,58 @@
+/*
+    Copyright 2016-2019 Arisotura
+
+    This file is part of melonDS.
+
+    melonDS 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.
+
+    melonDS 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 melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#ifndef LAN_PCAP_H
+#define LAN_PCAP_H
+
+#include "../types.h"
+
+namespace LAN_PCap
+{
+
+typedef struct
+{
+    char DeviceName[128];
+    char FriendlyName[128];
+    char Description[128];
+
+    u8 MAC[6];
+    u8 IP_v4[4];
+
+    u8 DNS[8][4];
+
+    u8 DHCP_MAC[6];
+    u8 DHCP_IP_v4[4];
+
+    void* Internal;
+
+} AdapterData;
+
+
+extern AdapterData* Adapters;
+extern int NumAdapters;
+
+
+bool Init();
+void DeInit();
+
+int SendPacket(u8* data, int len);
+int RecvPacket(u8* data);
+
+}
+
+#endif // LAN_PCAP_H