Fixed something in the DHT, added a milisecond time function.

core/DHT.c

@@ -713,10 +713,10 @@ void doFriends()
         {
             if(friends_list[i].client_list[j].timestamp + Kill_NODE_TIMEOUT > temp_time)//if node is not dead.
             {
-                //TODO: Make this better, it only works if the function is called more than once per second.
+                if((friends_list[i].client_list[j].last_pinged + PING_INTERVAL) <= temp_time)
-                if((temp_time - friends_list[i].client_list[j].timestamp) % PING_INTERVAL == 0)
                 {
                     pingreq(friends_list[i].client_list[j].ip_port);
+                    friends_list[i].client_list[j].last_pinged = temp_time;
                 }
                 if(friends_list[i].client_list[j].timestamp + BAD_NODE_TIMEOUT > temp_time)//if node is good.
                 {
@@ -751,10 +751,10 @@ void doClose()//tested
     {
         if(close_clientlist[i].timestamp + Kill_NODE_TIMEOUT > temp_time)//if node is not dead.
         {
-            //TODO: Make this better, it only works if the function is called more than once per second.
+            if((close_clientlist[i].last_pinged + PING_INTERVAL) <= temp_time)
-            if((temp_time - close_clientlist[i].timestamp) % PING_INTERVAL == 0)
             {
                 pingreq(close_clientlist[i].ip_port);
+                close_clientlist[i].last_pinged = temp_time;
             }
             if(close_clientlist[i].timestamp + BAD_NODE_TIMEOUT > temp_time)//if node is good.
             {

core/DHT.h

@@ -39,7 +39,7 @@ typedef struct
     char client_id[CLIENT_ID_SIZE];
     IP_Port ip_port;
     uint32_t timestamp;
-    
+    uint32_t last_pinged;
 }Client_data;
 //maximum number of clients stored per friend.
 #define MAX_FRIEND_CLIENTS 8

core/network.c

@@ -24,12 +24,26 @@
 
 #include "network.h"
 
+
+//returns current time in milleseconds since the epoch.
+uint64_t current_time()
+{
+    uint64_t time;
+    #ifdef WIN32
+    //TODO: windows version
+    #else
+    struct timeval a;
+    gettimeofday(&a, NULL);
+    time = 1000000UL*a.tv_sec + a.tv_usec;
+    #endif
+    return time;
+    
+}
+
 //our UDP socket, a global variable.
 static int sock;
 
 //Basic network functions:
-//TODO: put them somewhere else than here
-
 //Function to send packet(data) of length length to ip_port
 int sendpacket(IP_Port ip_port, char * data, uint32_t length)
 {

core/network.h

@@ -32,6 +32,7 @@
 #include <string.h>
 #include <time.h>
 
+
 #ifdef WIN32 //Put win32 includes here
 
 #include <winsock2.h>
@@ -43,7 +44,7 @@
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <errno.h>
-
+#include <sys/time.h>
 #endif
 
 #define MAX_UDP_PACKET_SIZE 65507
@@ -75,7 +76,8 @@ typedef struct
 }ADDR;
 
 
-
+//returns current time in milleseconds since the epoch.
+uint64_t current_time();
 
 //Basic network functions:
 

docs/Lossless_UDP.txt

@@ -15,7 +15,7 @@ Lossless UDP:
             Alice puts it in the handshake packet (handshake_id1).
             Alice starts sending handshake packets to Bob (send 10 packets over 5 seconds if no response connection fails.)
             Bob receives the packet.
-            Bob copies the handshake packet he got from alice but adds a random 4 byte number to it (handshake_id2)
+            Bob copies the handshake packet he got from alice but caternates a random 4 byte number to it (handshake_id2)
             Alice receives the packet, checks if handshake_id1 matches the one she sent.
             If it does she starts sending SYNC packets with sent_packetnum = handshake_id2 .
             Bob receives the packet, 

testing/DHT_test.c

@@ -40,7 +40,8 @@ void print_clientlist()
         }
         p_ip = close_clientlist[i].ip_port;
         printf("\nIP: %u.%u.%u.%u Port: %u",p_ip.ip.c[0],p_ip.ip.c[1],p_ip.ip.c[2],p_ip.ip.c[3],ntohs(p_ip.port));
-        printf("\nTimestamp: %u\n", close_clientlist[i].timestamp);
+        printf("\nTimestamp: %u", close_clientlist[i].timestamp);
+        printf("\nLast pinged: %u\n", close_clientlist[i].last_pinged);
     }  
 }
 
@@ -73,7 +74,8 @@ void print_friendlist()
             }
             p_ip = friends_list[k].client_list[i].ip_port;
             printf("\nIP: %u.%u.%u.%u:%u",p_ip.ip.c[0],p_ip.ip.c[1],p_ip.ip.c[2],p_ip.ip.c[3],ntohs(p_ip.port));
-            printf("\nTimestamp: %u\n", friends_list[k].client_list[i].timestamp);
+            printf("\nTimestamp: %u", friends_list[k].client_list[i].timestamp);
+            printf("\nLast pinged: %u\n", friends_list[k].client_list[i].last_pinged);
         }
     }
 }