Now compiles. Functions starting to take form.

core/DHT.c

@@ -1,12 +1,27 @@
 #include "DHT.h"
 
-//send a getnodes request
-int getnodes()
+
+//Function to send packet(data) of length length to ip_port
+int sendpacket(IP_Port ip_port, char * data, uint32_t length)
 {
+    ADDR addr = {.family = AF_INET, .ip = ip_port.ip, .port = ip_port.port};
     
-    
-    
-    
+    return sendto(sock, data, length, 0, (struct sockaddr *)&addr, sizeof(addr));
+}
+
+
+
+//send a getnodes request
+//Currently incomplete: missing the ping_id part
+int getnodes(IP_Port ip_port, char * client_id)
+{
+   char data[69];
+   data[0] = 2;
+   
+   memcpy(data + 5, self_client_id, 32);
+   memcpy(data + 37, client_id, 32);
+   
+   sendpacket(ip_port, data, sizeof(data));
 }
 
 //send a ping request
@@ -14,15 +29,45 @@ int getnodes()
 int ping(IP_Port ip_port)
 {
     char data[37];
-    data[0] = 00;
-    memcpy(data + 5, self_client_id, 32);
-//ADDR addr = {.family = AF_INET, .ip = ip_port.ip, .port = ip_port.port};
+    data[0] = 0;
+    
+    memcpy(data + 5, self_client_id, 32);
+    
+    sendpacket(ip_port, data, sizeof(data));
     
-//return sendto(sock, data, sizeof(data) - 1, 0, (struct sockaddr *)&addr, addrlen);
-    //sendto(int socket_descriptor, char *buffer, int buffer_length, int flags, struct sockaddr *destination_address, int address_length);
 }
 
 
+//Packet handling functions
+//One to handle each types of packets
+
+int handle_pingreq(char * packet, uint32_t length, IP_Port source)
+{
+    
+    
+}
+
+int handle_pingres(char * packet, uint32_t length, IP_Port source)
+{
+    
+    
+}
+
+int handle_getnodes(char * packet, uint32_t length, IP_Port source)
+{
+    
+    
+}
+
+int handle_sendnodes(char * packet, uint32_t length, IP_Port source)
+{
+    
+    
+}
+
+
+
+
 
 void addfriend(char * client_id)
 {
@@ -58,8 +103,26 @@ IP_Port getfriendip(char * client_id)
 
 
 
-void DHT_recvpacket(char * packet, uint32_t length)
+void DHT_recvpacket(char * packet, uint32_t length, IP_Port source)
 {
+    switch (packet[0]) {
+    case 0:
+        handle_pingreq(packet, length, source);
+        break;        
+    case 1:
+        handle_pingres(packet, length, source);
+        break;        
+    case 2:
+        handle_getnodes(packet, length, source);
+        break;        
+    case 3:
+        handle_sendnodes(packet, length, source);
+        break;
+    default: 
+        break;
+        
+    }
+    
 
 }
 

core/DHT.h

@@ -59,6 +59,19 @@ typedef struct
 }Pinged;
 
 
+typedef struct
+{
+    int16_t family;
+    uint16_t port;
+    IP ip;
+    uint8_t zeroes[8];
+    #ifdef ENABLE_IPV6
+    uint8_t zeroes2[12];
+    #endif
+}ADDR;
+
+
+
 //Add a new friend to the friends list
 //client_id must be 32 bytes long.
 void addfriend(char * client_id);
@@ -83,7 +96,7 @@ IP_Port getfriendip(char * client_id);
 void doDHT();
 
 //if we recieve a DHT packet we call this function so it can be handled.
-void DHT_recvpacket(char * packet, uint32_t length);
+void DHT_recvpacket(char * packet, uint32_t length, IP_Port source);
 
 //Use this function to bootstrap the client
 //Sends a get nodes request to the given ip port
@@ -103,7 +116,9 @@ char self_client_id[32];
 //We only use one so it's much easier to have it as a global variable
 int sock;
 
-Client_data client_list[32];
+#define LCLIENT_LIST 32
+
+Client_data client_list[LCLIENT_LIST];
 
 //Let's start with a static array for testing.
 Friend friends_list[256];
@@ -111,8 +126,12 @@ uint16_t num_friends;
 
 //The list of ip ports along with the ping_id of what we sent them and a timestamp
 //TODO: make this more efficient looping up to 128 times is a bit...
-Pinged pings[128];
+#define LPING_ARRAY 128
 
-Pinged send_nodes[64];
+Pinged pings[LPING_ARRAY];
+
+#define LSEND_NODES_ARRAY LPING_ARRAY/2
+
+Pinged send_nodes[LSEND_NODES_ARRAY];
 
 

testing/DHT_test.c

@@ -0,0 +1,17 @@
+/* DHT test
+ * A file with a main that runs our DHT for testing.
+ * 
+ * Compile with: gcc -Wall -o test ../core/DHT.c DHT_test.c
+ */
+
+#include "../core/DHT.h"
+
+#define PORT 45344
+
+int main()
+{
+    
+    
+    
+ return 0;   
+}