1 files changed, 154 insertions, 20 deletions

diff --git a/core/Messenger.c b/core/Messenger.c
index 7cfbb8ca..1107b60f 100644
--- a/core/Messenger.c
+++ b/core/Messenger.c
@@ -10,71 +10,203 @@
 typedef struct
 {
     uint8_t client_id[CLIENT_ID_SIZE];
-    
+    int crypt_connection_id;
+    int friend_request_id; //id of the friend request corresponding to the current friend request to the current friend.
+    uint8_t status;//0 if no friend, 1 if added, 2 if friend request successfully sent, 3 if confirmed friend, 4 if online.
     
 }Friend;
  
+
+uint8_t info[MAX_DATA_SIZE]; //the data that is sent during the friend requests we do
+
+uint16_t info_size; //length of the info
+
 #define MAX_NUM_FRIENDS 256
 
 Friend friendlist[MAX_NUM_FRIENDS];
+
+#define MAX_MESSAGE_LENGTH 256
+
+uint32_t numfriends;
  
 //add a friend
+//client_id is the client i of the friend
 //returns the friend number if success
 //return -1 if failure.
 int m_addfriend(uint8_t * client_id)
 {
     
-    //add friend to the DHT
-    addfriend(uint8_t * client_id);
-    
-    send_friendrequest(uint8_t * public_key, IP_Port ip_port, uint8_t * data, uint32_t length);
+    DHT_addfriend(client_id);
+    friendlist[numfriends].status = 1;
+    friendlist[numfriends].friend_request_id = -1;
+    memcpy(friendlist[numfriends].client_id, client_id, CLIENT_ID_SIZE);
+    numfriends++;
     
+    return numfriends - 1;
 }
 
 //remove a friend
 int m_delfriend(int friendnumber)
+{/*
+    TODO
+    DHT_delfriend(friendlist[friendnumber].client_id);
+*/
+}
+
+
+//return 4 if friend is online
+//return 3 if friend is confirmed
+//return 2 if the friend request was sent successfully
+//return 1 if the friend was added
+//return 0 if there is no friend with that number.
+int m_friendstatus(int friendnumber)
 {
-    //delete friend from DHT
-    delfriend(uint8_t * client_id);
-    
+    if(friendnumber < 0 || friendnumber >= MAX_NUM_FRIENDS)
+    {
+        return 0;
+    }
+    return friendlist[friendnumber].status;
 }
 
 
-//return 1 if friend is online
-//return 0 if he is not
-int m_friendonline(int friendnumber)
+//send a text chat message to an online friend.
+//returns 1 if packet was successfully put into the send queue
+//return 0 if it was not.
+int m_sendmessage(int friendnumber, uint8_t * message, uint32_t length)
 {
-    
+    if(length >= MAX_DATA_SIZE)
+    //this does not mean the maximum message length is MAX_DATA_SIZE - 1, it is actually 17 bytes less.
+    {
+        return 0;   
+    }
+    uint8_t temp[MAX_DATA_SIZE];
+    temp[0] = 64;
+    memcpy(temp + 1, message, length);
+    return write_cryptpacket(friendlist[friendnumber].crypt_connection_id, temp, length + 1);
     
 }
 
+//set the data that will be sent along with friend requests
+//return -1 if failure
+//return 0 if success
+int m_setinfo(uint8_t * data, uint16_t length)
+{
+    if(length == 0 || length > MAX_DATA_SIZE - 1 - crypto_box_PUBLICKEYBYTES - crypto_box_NONCEBYTES)
+    {
+        return -1;
+    }
+    memcpy(info, data, length);
+    info_size = length;
+    return 0;
+}
 
-//send a text chat message to a friend.
-int m_sendmessage(int friendnumber)
+void (*friend_request)(uint8_t *, uint8_t *, uint16_t);
+
+//set the function that will be executed when a friend request is received.
+int m_callback_friendrequest(void (*function)(uint8_t *, uint8_t *, uint16_t))
 {
-    write_cryptpacket(int crypt_connection_id, uint8_t * data, uint32_t length);
-    
+    friend_request = function;
+}
+
+
+void (*friend_message)(int, uint8_t *, uint16_t);
+
+//set the function that will be executed when a message from a friend is received.
+int m_callback_friendmessage(void (*function)(int, uint8_t *, uint16_t))
+{
+    friend_message = function;
 }
 
 
 #define PORT 33445
 //run this at startup
-void initMessenger();
+void initMessenger()
 {
     new_keys();
+    initNetCrypto();
     IP ip;
     ip.i = 0;
     init_networking(ip, PORT);
+    memcpy(self_client_id, self_public_key, crypto_box_PUBLICKEYBYTES);
     
 }
 
+void doFriends()
+{//TODO: add incoming connections and some other stuff.
+    uint32_t i;
+    int len;
+    uint8_t temp[MAX_DATA_SIZE];
+    for(i = 0; i < numfriends; i++)
+    {
+        if(friendlist[i].status == 1)
+        {
+             IP_Port friendip = DHT_getfriendip(friendlist[i].client_id);
+             int request = check_friendrequest(friendlist[i].friend_request_id);
+             //printf("\n%u %u %u\n", friendip.ip.i, request, friendlist[i].friend_request_id);
+             if(friendip.ip.i > 1 && request == -1)
+             {
+                  friendlist[i].friend_request_id = send_friendrequest(friendlist[i].client_id, friendip, info, info_size);
+             }
+             if(request == 1)
+             {
+                  friendlist[i].status = 2;
+             }
+        }
+        if(friendlist[i].status == 2 || friendlist[i].status == 3)
+        {
+            IP_Port friendip = DHT_getfriendip(friendlist[i].client_id);
+            if(is_cryptoconnected(friendlist[i].crypt_connection_id) == 0 && friendip.ip.i > 1)
+            {
+                 friendlist[i].crypt_connection_id = crypto_connect(friendlist[i].client_id, friendip);
+            }
+            if(is_cryptoconnected(friendlist[i].crypt_connection_id) == 3)//if connection is established.
+            {
+                 friendlist[i].status = 4;
+            }
+        }
+        while(friendlist[i].status == 4)
+        {
+            len = read_cryptpacket(friendlist[i].crypt_connection_id, temp);
+            if(len > 0)
+            {
+                 if(temp[0] == 64)
+                 {
+                     (*friend_message)(i, temp, len);
+                 }
+            }
+            else
+            {
+                 if(is_cryptoconnected(friendlist[i].crypt_connection_id) == 4)//if the connection timed out, kill it
+                 {
+                         crypto_kill(friendlist[i].crypt_connection_id);
+                         friendlist[i].status = 3;
+                 }
+                 break;
+            }
+        }
+    }
+}
+
+void doFriendRequest()
+{
+    uint8_t public_key[crypto_box_PUBLICKEYBYTES];
+    uint8_t temp[MAX_DATA_SIZE];
+    
+    int len = handle_friendrequest(public_key, temp);
+    if(len >= 0)
+    {
+        (*friend_request)(public_key, temp, len);
+
+    }
+
+}
 //the main loop that needs to be run at least 200 times per second.
-void doMessenger();
+void doMessenger()
 {
     IP_Port ip_port;
     uint8_t data[MAX_UDP_PACKET_SIZE];
     uint32_t length;
-    while(recievepacket(&ip_port, data, &length) != -1)
+    while(receivepacket(&ip_port, data, &length) != -1)
     {
         //if(rand() % 3 != 1)//simulate packet loss
         //{
@@ -92,4 +224,6 @@ void doMessenger();
     doDHT();
     doLossless_UDP();
     doNetCrypto();
-}
\ No newline at end of file
+    doFriendRequest();
+    doFriends();
+}