Added nicknames and nickname syncing.

core/Messenger.c

@@ -24,6 +24,7 @@
 
 #include "Messenger.h"
  
+#define MAX_NAME_LENGTH 128
  
 typedef struct
 {
@@ -32,6 +33,8 @@ typedef struct
     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 sent, 3 if confirmed friend, 4 if online.
     uint8_t info[MAX_DATA_SIZE]; //the data that is sent during the friend requests we do
+    uint8_t name[MAX_NAME_LENGTH];
+    uint8_t name_sent;//0 if we didn't send our name to this friend 1 if we have.
     uint16_t info_size; //length of the info
 }Friend;
  
@@ -39,6 +42,7 @@ typedef struct
 
 uint8_t self_public_key[crypto_box_PUBLICKEYBYTES];
 
+static uint8_t self_name[MAX_NAME_LENGTH];
 
 #define MAX_NUM_FRIENDS 256
 
@@ -216,6 +220,63 @@ int m_sendmessage(int friendnumber, uint8_t * message, uint32_t length)
     return write_cryptpacket(friendlist[friendnumber].crypt_connection_id, temp, length + 1);
 }
 
+//send a name packet to friendnumber
+static int m_sendname(int friendnumber, uint8_t * name)
+{
+    uint8_t temp[MAX_NAME_LENGTH + 1];
+    memcpy(temp + 1, name, MAX_NAME_LENGTH);
+    temp[0] = 48;
+    return write_cryptpacket(friendlist[friendnumber].crypt_connection_id, temp, MAX_NAME_LENGTH + 1);
+}
+
+//set the name of a friend
+//return 0 if success
+//return -1 if failure
+
+static int setfriendname(int friendnumber, uint8_t * name)
+{
+    if(friendnumber >= numfriends || friendnumber < 0)
+    {
+        return -1;
+    }
+    memcpy(friendlist[friendnumber].name, name, MAX_NAME_LENGTH);
+    return 0;
+}
+
+
+//Set our nickname
+//name must be a string of maximum MAX_NAME_LENGTH length.
+//return 0 if success
+//return -1 if failure
+int setname(uint8_t * name, uint16_t length)
+{
+    if(length > MAX_NAME_LENGTH)
+    {
+        return -1;
+    }
+    memcpy(self_name, name, length);
+    uint32_t i;
+    for(i = 0; i < numfriends; i++)
+    {
+        friendlist[i].name_sent = 0;
+    }
+    return 0;
+}
+
+//get name of friendnumber
+//put it in name
+//name needs to be a valid memory location with a size of at least MAX_NAME_LENGTH bytes.
+//return 0 if success
+//return -1 if failure
+int getname(int friendnumber, uint8_t * name)
+{
+    if(friendnumber >= numfriends || friendnumber < 0)
+    {
+        return -1;
+    }
+    memcpy(name, friendlist[friendnumber].name, MAX_NAME_LENGTH);
+    return 0;
+}
 
 static void (*friend_request)(uint8_t *, uint8_t *, uint16_t);
 
@@ -265,7 +326,7 @@ static void doFriends()
                   friendlist[i].status = 2;
              }
         }
-        if(friendlist[i].status == 2 || friendlist[i].status == 3)
+        if(friendlist[i].status == 2 || friendlist[i].status == 3) //friend is not online
         {
             check_friendrequest(friendlist[i].friend_request_id);//for now this is used to kill the friend request
             IP_Port friendip = DHT_getfriendip(friendlist[i].client_id);
@@ -286,12 +347,25 @@ static void doFriends()
                     break;
             }
         }
-        while(friendlist[i].status == 4)
+        while(friendlist[i].status == 4) //friend is online
         {
+            if(friendlist[i].name_sent == 0)
+            {
+                if(m_sendname(i, self_name))
+                {
+                    friendlist[i].name_sent = 1;
+                }
+            }
             len = read_cryptpacket(friendlist[i].crypt_connection_id, temp);
             if(len > 0)
             {
-                 if(temp[0] == 64)
+                 if(temp[0] == 48 && len == MAX_NAME_LENGTH + 1)//Username
+                 {
+                     memcpy(friendlist[i].name, temp + 1, MAX_NAME_LENGTH);
+                     friendlist[i].name[MAX_NAME_LENGTH - 1] = 0;//make sure the NULL terminator is present.
+                 }
+                 else 
+                 if(temp[0] == 64)//Chat message
                  {
                      (*friend_message)(i, temp + 1, len - 1);
                  }
@@ -446,7 +520,7 @@ int Messenger_load(uint8_t * data, uint32_t length)
     uint32_t i;
     for(i = 0; i < num; i++)
     {
-        m_addfriend_norequest(temp[i].client_id);
+        setfriendname(m_addfriend_norequest(temp[i].client_id), temp[i].name);
     }
     free(temp);
     return 0;

core/Messenger.h

@@ -71,6 +71,19 @@ int m_friendstatus(int friendnumber);
 //return 0 if it was not.
 int m_sendmessage(int friendnumber, uint8_t * message, uint32_t length);
 
+//Set our nickname
+//name must be a string of maximum MAX_NAME_LENGTH length.
+//return 0 if success
+//return -1 if failure
+int setname(uint8_t * name, uint16_t length);
+
+
+//get name of friendnumber
+//put it in name
+//name needs to be a valid memory location with a size of at least MAX_NAME_LENGTH (128) bytes.
+//return 0 if success
+//return -1 if failure
+int getname(int friendnumber, uint8_t * name);
 
 //set the function that will be executed when a friend request is received.
 //function format is function(uint8_t * public_key, uint8_t * data, uint16_t length)

docs/Messenger_Protocol.txt

@@ -1,4 +1,6 @@
-Protocol for messages, data, video, etc..
+Protocol for messages, data, etc..
+
+Streaming audio/video will not use this protocol as they can absorb some data loss.
 
 The protocol itself will run on top of the encryption which means it should be 
 impossible for someone to know what type of data is being transmitted.(Well they 
@@ -12,6 +14,8 @@ Basic packet format:
 
 data_id represents the type of data.
 
+All strings must be UTF-8.
+
 EX: data_id 64 designates a chat message. so the packet would look like: @Hello WorldNULL
 Where @ is the ASCII character for 64, "Hello World" is the message and NULL is the null string terminator.
 
@@ -19,11 +23,10 @@ Proposed data_ids and what they mean (in decimal)
 
 ids 0 to 16 are reserved.
 
+48 Username (Send this packet as soon as you connect to a friend or to each friend everytime you change names.
+              Username is maximum 128 bytes long with the null terminator included)
+
 
 64 Chat message
-65 Audio Data(Voip)
+6? File transmission.
-66 Video?
+
-67 File transmission.
-68 
-69 
-...

testing/Messenger_test.c

@@ -117,6 +117,8 @@ int main(int argc, char *argv[])
         printf("%hhX",self_public_key[i]);
     }
     
+    setname((uint8_t *)"Anon", 5);
+    
     char temp_id[128];
     printf("\nEnter the client_id of the friend you wish to add (32 bytes HEX format):\n");
     if(scanf("%s", temp_id) != 1)
@@ -129,6 +131,10 @@ int main(int argc, char *argv[])
 
     while(1)
     {
+        uint8_t name[128];
+        getname(num, name);
+        printf("%s\n", name);
+        
         m_sendmessage(num, (uint8_t*)"Test", 5);
         doMessenger();
         c_sleep(30);