Add custom user statuses to core, updated nTox to support nicknames and user statuses.

core/Messenger.c

@@ -23,8 +23,7 @@
 */
 
 #include "Messenger.h"
- 
-#define MAX_NAME_LENGTH 128
+#define MIN(a,b) (((a)<(b))?(a):(b))
  
 typedef struct
 {
@@ -35,6 +34,9 @@ typedef struct
     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.
+    uint8_t *userstatus;
+    uint16_t userstatus_length;
+    uint8_t userstatus_sent;
     uint16_t info_size; //length of the info
 }Friend;
  
@@ -43,6 +45,8 @@ typedef struct
 uint8_t self_public_key[crypto_box_PUBLICKEYBYTES];
 
 static uint8_t self_name[MAX_NAME_LENGTH];
+static uint8_t *self_userstatus;
+static uint16_t self_userstatus_len;
 
 #define MAX_NUM_FRIENDS 256
 
@@ -125,7 +129,8 @@ int m_addfriend(uint8_t * client_id, uint8_t * data, uint16_t length)
             friendlist[i].crypt_connection_id = -1;
             friendlist[i].friend_request_id = -1;
             memcpy(friendlist[i].client_id, client_id, CLIENT_ID_SIZE);
-            
+            friendlist[i].userstatus = calloc(1, 1);
+            friendlist[i].userstatus_length = 1;
             memcpy(friendlist[i].info, data, length);
             friendlist[i].info_size = length;
             
@@ -152,6 +157,8 @@ int m_addfriend_norequest(uint8_t * client_id)
             friendlist[i].crypt_connection_id = -1;
             friendlist[i].friend_request_id = -1;
             memcpy(friendlist[i].client_id, client_id, CLIENT_ID_SIZE);
+            friendlist[i].userstatus = calloc(1, 1);
+            friendlist[i].userstatus_length = 1;
             numfriends++;
             return i;
         }
@@ -171,6 +178,7 @@ int m_delfriend(int friendnumber)
 
     DHT_delfriend(friendlist[friendnumber].client_id);
     crypto_kill(friendlist[friendnumber].crypt_connection_id);
+    free(friendlist[friendnumber].userstatus);
     memset(&friendlist[friendnumber], 0, sizeof(Friend));
     uint32_t i;
     for(i = numfriends; i != 0; i--)
@@ -278,6 +286,72 @@ int getname(int friendnumber, uint8_t * name)
     return 0;
 }
 
+int m_set_userstatus(uint8_t *status, uint16_t length)
+{
+    if(length > MAX_USERSTATUS_LENGTH)
+    {
+        return -1;
+    }
+    uint8_t *newstatus = calloc(length, 1);
+    memcpy(newstatus, status, length);
+    free(self_userstatus);
+    self_userstatus = newstatus;
+    self_userstatus_len = length;
+
+    uint32_t i;
+    for(i = 0; i < numfriends; i++)
+    {
+        friendlist[i].userstatus_sent = 0;
+    }
+    return 0;
+}
+
+// return the size of friendnumber's user status
+// guaranteed to be at most MAX_USERSTATUS_LENGTH
+int m_get_userstatus_size(int friendnumber)
+{
+    if(friendnumber >= numfriends || friendnumber < 0)
+    {
+        return -1;
+    }
+    return friendlist[friendnumber].userstatus_length;
+}
+
+// copy the user status of friendnumber into buf, truncating if needed to maxlen
+// bytes, use m_get_userstatus_size to find out how much you need to allocate
+int m_copy_userstatus(int friendnumber, uint8_t * buf, uint32_t maxlen)
+{
+    if(friendnumber >= numfriends || friendnumber < 0)
+    {
+        return -1;
+    }
+    memset(buf, 0, 1);
+    memcpy(buf, friendlist[friendnumber].userstatus, MIN(maxlen, MAX_USERSTATUS_LENGTH) - 1);
+    return 0;
+}
+
+static int send_userstatus(int friendnumber, uint8_t * status, uint16_t length)
+{
+    uint8_t *thepacket = malloc(length + 1);
+    memcpy(thepacket + 1, status, length);
+    thepacket[0] = 70;
+    return write_cryptpacket(friendlist[friendnumber].crypt_connection_id, thepacket, length + 1);
+}
+
+static int set_friend_userstatus(int friendnumber, uint8_t * status, uint16_t length)
+{
+    if(friendnumber >= numfriends || friendnumber < 0)
+    {
+        return -1;
+    }
+    uint8_t *newstatus = calloc(length, 1);
+    memcpy(newstatus, status, length);
+    free(friendlist[friendnumber].userstatus);
+    friendlist[friendnumber].userstatus = newstatus;
+    friendlist[friendnumber].userstatus_length = length;
+    return 0;
+}
+
 static void (*friend_request)(uint8_t *, uint8_t *, uint16_t);
 
 //set the function that will be executed when a friend request is received.
@@ -296,11 +370,24 @@ void m_callback_friendmessage(void (*function)(int, uint8_t *, uint16_t))
 }
 
 
+static void (*friend_namechange)(int, uint8_t *, uint16_t);
+void m_callback_namechange(void (*function)(int, uint8_t *, uint16_t))
+{
+    friend_namechange = function;
+}
+
+static void (*friend_statuschange)(int, uint8_t *, uint16_t);
+void m_callback_userstatus(void (*function)(int, uint8_t *, uint16_t))
+{
+    friend_statuschange = function;
+}
+
 #define PORT 33445
 //run this at startup
 void initMessenger()
 {
     new_keys();
+    m_set_userstatus((uint8_t*)"Online", sizeof("Online"));
     initNetCrypto();
     IP ip;
     ip.i = 0;
@@ -356,18 +443,36 @@ static void doFriends()
                     friendlist[i].name_sent = 1;
                 }
             }
+            if(friendlist[i].userstatus_sent == 0)
+            {
+                if(send_userstatus(i, self_userstatus, self_userstatus_len))
+                {
+                    friendlist[i].userstatus_sent = 1;
+                }
+            }
             len = read_cryptpacket(friendlist[i].crypt_connection_id, temp);
             if(len > 0)
             {
-                 if(temp[0] == 48 && len == MAX_NAME_LENGTH + 1)//Username
-                 {
+                switch(temp[0]) {
+                    case 48: {
+                        if (len != MAX_NAME_LENGTH + 1) break;
+                        friend_namechange(i, temp + 1, MAX_NAME_LENGTH); // todo: use the actual length
                         memcpy(friendlist[i].name, temp + 1, MAX_NAME_LENGTH);
                         friendlist[i].name[MAX_NAME_LENGTH - 1] = 0;//make sure the NULL terminator is present.
+                        break;
                     }
-                 else 
-                 if(temp[0] == 64)//Chat message
-                 {
+                    case 64: {
                         (*friend_message)(i, temp + 1, len - 1);
+                        break;
+                    }
+                    case 70: {
+                        uint8_t *status = calloc(MIN(len - 1, MAX_USERSTATUS_LENGTH), 1);
+                        memcpy(status, temp + 1, MIN(len - 1, MAX_USERSTATUS_LENGTH));
+                        friend_statuschange(i, status, MIN(len - 1, MAX_USERSTATUS_LENGTH));
+                        set_friend_userstatus(i, status, MIN(len - 1, MAX_USERSTATUS_LENGTH));
+                        free(status);
+                        break;
+                    }
                 }
             }
             else
@@ -520,7 +625,9 @@ int Messenger_load(uint8_t * data, uint32_t length)
     uint32_t i;
     for(i = 0; i < num; i++)
     {
-        setfriendname(m_addfriend_norequest(temp[i].client_id), temp[i].name);
+        int fnum = m_addfriend_norequest(temp[i].client_id);
+        setfriendname(fnum, temp[i].name);
+        set_friend_userstatus(fnum, temp[i].userstatus, temp[i].userstatus_length);
     }
     free(temp);
     return 0;

core/Messenger.h

@@ -30,6 +30,10 @@
 #include "net_crypto.h"
 #include "DHT.h"
 
+#define MAX_NAME_LENGTH 128
+#define MAX_USERSTATUS_LENGTH 128
+// don't assume MAX_USERSTATUS_LENGTH will stay at 128, it may be increased
+// to an absurdly large number later
 
 //add a friend
 //set the data that will be sent along with friend request
@@ -85,6 +89,20 @@ int setname(uint8_t * name, uint16_t length);
 //return -1 if failure
 int getname(int friendnumber, uint8_t * name);
 
+// set our user status
+// you are responsible for freeing status after
+// returns 0 on success, -1 on failure
+int m_set_userstatus(uint8_t *status, uint16_t length);
+
+// return the length of friendnumber's user status,
+// including null
+// pass it into malloc
+int m_get_userstatus_size(int friendnumber);
+
+// copy friendnumber's userstatus into buf, truncating if size is over maxlen
+// get the size you need to allocate from m_get_userstatus_size
+int m_copy_userstatus(int friendnumber, uint8_t * buf, uint32_t maxlen);
+
 //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)
 void m_callback_friendrequest(void (*function)(uint8_t *, uint8_t *, uint16_t));
@@ -94,6 +112,15 @@ void m_callback_friendrequest(void (*function)(uint8_t *, uint8_t *, uint16_t));
 //function format is: function(int friendnumber, uint8_t * message, uint32_t length)
 void m_callback_friendmessage(void (*function)(int, uint8_t *, uint16_t));
 
+// set the callback for name changes
+// function(int friendnumber, uint8_t *newname, uint16_t length)
+// you are not responsible for freeing newname
+void m_callback_namechange(void (*function)(int, uint8_t *, uint16_t));
+
+// set the callback for user status changes
+// function(int friendnumber, uint8_t *newstatus, uint16_t length)
+// you are not responsible for freeing newstatus
+void m_callback_userstatus(void (*function)(int, uint8_t *, uint16_t));
 
 //run this at startup
 void initMessenger();

docs/Messenger_Protocol.txt

@@ -29,4 +29,4 @@ ids 0 to 16 are reserved.
 
 64 Chat message
 6? File transmission.
-
+70 Status change

testing/nTox.c

@@ -72,6 +72,30 @@ void line_eval(char lines[HISTORY][STRING_LENGTH], char *line)
             }
             int num = atoi(numstring);
             m_sendmessage(num, (uint8_t*) message, sizeof(message));
+        } else if (line[1] == 'n') {
+            uint8_t name[MAX_NAME_LENGTH];
+            int i = 0;
+            for (i=3; i<strlen(line); i++) {
+                if (line[i] == 0 || line[i] == '\n') break;
+                name[i - 3] = line[i];
+            }
+            name[i - 3] = 0;
+            setname(name, i);
+            char numstring[100];
+            sprintf(numstring, "Changed nick to: %s", (char*)name);
+            new_lines(numstring);
+        } else if (line[1] == 's') {
+            uint8_t status[MAX_USERSTATUS_LENGTH];
+            int i = 0;
+            for (i=3; i<strlen(line); i++) {
+                if (line[i] == 0 || line[i] == '\n') break;
+                status[i - 3] = line[i];
+            }
+            status[i - 3] = 0;
+            m_set_userstatus(status, strlen((char*)status));
+            char numstring[100];
+            sprintf(numstring, "Changed status to: %s", (char*)status);
+            new_lines(numstring);
         } else if (line[1] == 'q') { //exit
 		endwin();
 		exit(EXIT_SUCCESS);
@@ -158,8 +182,27 @@ void print_request(uint8_t * public_key, uint8_t * data, uint16_t length)
 }
 void print_message(int friendnumber, uint8_t * string, uint16_t length)
 {
+    char *name = malloc(MAX_NAME_LENGTH);
+    getname(friendnumber, (uint8_t*)name);
+    char msg[100+length+strlen(name)+1];
+    sprintf(msg, "[%d] <%s> %s", friendnumber, name, string);
+    free(name);
+    new_lines(msg);
+}
+void print_nickchange(int friendnumber, uint8_t *string, uint16_t length) {
+    char *name = malloc(MAX_NAME_LENGTH);
+    getname(friendnumber, (uint8_t*)name);
     char msg[100+length];
-    sprintf(msg, "Message [%d]: %s", friendnumber, string);
+    sprintf(msg, "[%d] %s is now known as %s.", friendnumber, name, string);
+    free(name);
+    new_lines(msg);
+}
+void print_statuschange(int friendnumber, uint8_t *string, uint16_t length) {
+    char *name = malloc(MAX_NAME_LENGTH);
+    getname(friendnumber, (uint8_t*)name);
+    char msg[100+length+strlen(name)+1];
+    sprintf(msg, "[%d] %s's status changed to %s.", friendnumber, name, string);
+    free(name);
     new_lines(msg);
 }
 int main(int argc, char *argv[])
@@ -173,6 +216,8 @@ int main(int argc, char *argv[])
     initMessenger();
     m_callback_friendrequest(print_request);
     m_callback_friendmessage(print_message);
+    m_callback_namechange(print_nickchange);
+    m_callback_userstatus(print_statuschange);
     char idstring0[200];
     char idstring1[32][5];
     char idstring2[32][5];