salvage socket init code

src/wx/Platform.cpp

@@ -17,14 +17,90 @@
 */
 
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include "../Platform.h"
 
+#ifdef __WXMSW__
+	#include <winsock2.h>
+	#include <ws2tcpip.h>
+	#define socket_t    SOCKET
+	#define sockaddr_t  SOCKADDR
+	#define pcap_dev_name description
+#else
+	#include <unistd.h>
+	#include <arpa/inet.h>
+	#include <sys/socket.h>
+	#define socket_t    int
+	#define sockaddr_t  struct sockaddr
+	#define closesocket close
+	#define pcap_dev_name name
+#endif
+
+#ifndef INVALID_SOCKET
+#define INVALID_SOCKET  (socket_t)-1
+#endif
+
 
 namespace Platform
 {
 
 
-//
+socket_t MPSocket;
+sockaddr_t MPSendAddr;
+
+
+bool MP_Init()
+{
+    BOOL opt_true = TRUE;
+    int res;
+
+    MPSocket = socket(AF_INET, SOCK_DGRAM, 0);
+	if (MPSocket < 0)
+	{
+		return false;
+	}
+
+	res = setsockopt(MPSocket, SOL_SOCKET, SO_REUSEADDR, (const char*)&opt_true, sizeof(BOOL));
+	if (res < 0)
+	{
+		closesocket(MPSocket);
+		MPSocket = INVALID_SOCKET;
+		return false;
+	}
+
+	sockaddr_t saddr;
+	saddr.sa_family = AF_INET;
+	*(u32*)&saddr.sa_data[2] = htonl(INADDR_ANY);
+	*(u16*)&saddr.sa_data[0] = htons(7064);
+	res = bind(MPSocket, &saddr, sizeof(sockaddr_t));
+	if (res < 0)
+	{
+		closesocket(MPSocket);
+		MPSocket = INVALID_SOCKET;
+		return false;
+	}
+
+	res = setsockopt(MPSocket, SOL_SOCKET, SO_BROADCAST, (const char*)&opt_true, sizeof(BOOL));
+	if (res < 0)
+	{
+		closesocket(MPSocket);
+		MPSocket = INVALID_SOCKET;
+		return false;
+	}
+
+	MPSendAddr.sa_family = AF_INET;
+	*(u32*)&MPSendAddr.sa_data[2] = htonl(INADDR_BROADCAST);
+	*(u16*)&MPSendAddr.sa_data[0] = htons(7064);
+
+	return true;
+}
+
+void MP_DeInit()
+{
+    if (MPSocket >= 0)
+        closesocket(MPSocket);
+}
 
 
 }