Use Winsock for Windows

src/connection.c

@@ -4,9 +4,26 @@
 #include "connection.h"
 
 #include <stdlib.h>
+
+#ifdef _WIN32
+bool StartupWSA() {
+    static bool wsastarted = false;
+    if (!wsastarted) {
+        WORD		wVersionRequested;
+        WSADATA		wsaData;
+
+        wVersionRequested = MAKEWORD(2, 2);
+        if (WSAStartup(wVersionRequested, &wsaData) == 0) {
+            wsastarted = true;
+        }
+    }
+    return wsastarted;
+}
+#else
 #include <sys/socket.h>
 #include <sys/select.h>
 #include <netinet/in.h>
+#endif
 #include <string.h>
 #include <fcntl.h>
 #include <stdio.h>
@@ -106,6 +123,10 @@ connection_new(uint16_t source_port, uint32_t source_ip, uint16_t dest_port, uin
 enum connection_error
 connection_connect(struct Connection* conn) {
 
+#ifdef _WIN32
+    StartupWSA();
+#endif
+
     // Request a UDP socket
     conn->sockfd = socket(AF_INET, SOCK_DGRAM, 0);
 
@@ -114,8 +135,13 @@ connection_connect(struct Connection* conn) {
         return CONNECTION_LOCAL_BIND;
  
     // Make the socket non-blocking
+#ifdef _WIN32
+    static unsigned long sock_opts = 1;
+    ioctlsocket(conn->sockfd, FIONBIO, &sock_opts);	//Non-Blocking
+#else
     int flags = fcntl(conn->sockfd, F_GETFL);
     fcntl(conn->sockfd, F_SETFL, flags | O_NONBLOCK);
+#endif
 
     // File descriptors are numbers that count up sequentially,
     // so save the last one as the greatest file descriptor.