Added DHT.h (I hope it's not to bad)

core/DHT.h

@@ -0,0 +1,87 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <time.h>
+
+#ifdef WIN32
+
+
+//Put win32 includes here
+
+
+#else //Linux includes
+
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <errno.h>
+
+#endif
+
+
+typedef union
+{
+    uint8_t c[4];
+    uint16_t s[2];
+    uint32_t i;
+}IP;
+
+typedef struct
+{
+    IP ip;
+    uint16_t port;
+    
+}IP_Port;
+
+
+typedef struct
+{
+    char client_id[32];
+    IP_Port ip_port;
+    uint32_t timestamp;
+    
+}Client_data;
+
+
+typedef struct
+{
+    char client_id[32];
+    Client_data client_list[8];
+    
+}Friend;
+
+
+
+//Add a new friend to the friends list
+//client_id must be 32 bytes long.
+void addfriend(char * client_id);
+
+//Delete a friend from the friends list
+//client_id must be 32 bytes long.
+//returns 0 if success
+//returns 1 if failure (client_id not in friends list)
+char delfriend(char * client_id);
+
+//Get ip of friend
+//client_id must be 32 bytes long.
+//ip must be 4 bytes long.
+//port must be 2 bytes long.
+//returns ip if success
+//returns ip of 0 if failure (This means the friend is either offline of we have not found him yet.)
+IP_Port getfriendip(char * client_id);
+
+
+//Run this function at least a couple times per second (It's the main loop)
+void doDHT();
+
+
+
+
+
+//Global variables
+
+Client_data client_list[32];
+
+//Let's start with a static array for testing.
+Friend friends_list[256]