15 files changed, 383 insertions, 23 deletions

diff --git a/other/DHT_bootstrap.c b/other/DHT_bootstrap.c
index 654b759f..aed17020 100644
--- a/other/DHT_bootstrap.c
+++ b/other/DHT_bootstrap.c
@@ -31,6 +31,7 @@
 #endif
 
 #include "../toxcore/DHT.h"
+#include "../toxcore/LAN_discovery.h"
 #include "../toxcore/friend_requests.h"
 #include "../testing/misc_tools.c"
 
@@ -123,6 +124,9 @@ int main(int argc, char *argv[])
 
     int is_waiting_for_dht_connection = 1;
 
+    uint64_t last_LANdiscovery = 0;
+    LANdiscovery_init(dht);
+
     while (1) {
         if (is_waiting_for_dht_connection && DHT_isconnected(dht)) {
             printf("Connected to other bootstrap server successfully.\n");
@@ -130,6 +134,10 @@ int main(int argc, char *argv[])
         }
 
         do_DHT(dht);
+        if (last_LANdiscovery + (is_waiting_for_dht_connection ? 5 : LAN_DISCOVERY_INTERVAL) < unix_time()) {
+            send_LANdiscovery(htons(PORT), dht->c);
+            last_LANdiscovery = unix_time();
+        }
 
         networking_poll(dht->c->lossless_udp->net);
 
diff --git a/testing/nTox.c b/testing/nTox.c
index 438468bd..fa3b5b8c 100644
--- a/testing/nTox.c
+++ b/testing/nTox.c
@@ -348,13 +348,34 @@ void line_eval(Tox *m, char *line)
             do_refresh();
         } else if (inpt_command == 'h') { //help
             new_lines(help);
-        } else if (inpt_command == 'i') { //info
+        } else if (inpt_command == 'x') { //info
             char idstring[200];
             get_id(m, idstring);
             new_lines(idstring);
-        }
+        } else if (inpt_command == 'g') { //create new group chat
+            char msg[256];
+            sprintf(msg, "[g] Created new group chat with number: %u", tox_add_groupchat(m));
+            new_lines(msg);
+        } else if (inpt_command == 'i') { //invite friendnum to groupnum
+            char *posi[1];
+            int friendnumber = strtoul(line + prompt_offset, posi, 0);
+            int groupnumber = strtoul(*posi + 1, NULL, 0);
+            char msg[256];
+            sprintf(msg, "[g] Invited friend number %u to group number %u, returned: %u (0 means success)", friendnumber,
+                    groupnumber, tox_invite_friend(m, friendnumber, groupnumber));
+            new_lines(msg);
+        } else if (inpt_command == 'z') { //send message to groupnum
+            char *posi[1];
+            int groupnumber = strtoul(line + prompt_offset, posi, 0);
+
+            if (**posi != 0) {
+                char msg[256 + 1024];
+                sprintf(msg, "[g] sent message: %s to group num: %u returned: %u (0 means success)", *posi + 1, groupnumber,
+                        tox_group_message_send(m, groupnumber, (uint8_t *)*posi + 1, strlen(*posi + 1) + 1));
+                new_lines(msg);
+            }
 
-        else if (inpt_command == 'q') { //exit
+        } else if (inpt_command == 'q') { //exit
             endwin();
             exit(EXIT_SUCCESS);
         } else {
@@ -535,6 +556,22 @@ void print_help(void)
     puts("\t-f\t-\tSpecify a keyfile to read (or write to) from.");
 }
 
+void print_invite(Tox *m, int friendnumber, uint8_t *group_public_key, void *userdata)
+{
+    char msg[256];
+    sprintf(msg, "[i] recieved group chat invite from: %u, auto accepting and joining. group number: %u", friendnumber,
+            tox_join_groupchat(m, friendnumber, group_public_key));
+    new_lines(msg);
+}
+
+void print_groupmessage(Tox *m, int groupnumber, uint8_t *message, uint16_t length, void *userdata)
+{
+    char msg[256 + length];
+    sprintf(msg, "[g] %u: %s", groupnumber, message);
+    new_lines(msg);
+}
+
+
 int main(int argc, char *argv[])
 {
     int on = 0;
@@ -579,6 +616,8 @@ int main(int argc, char *argv[])
     tox_callback_friendmessage(m, print_message, NULL);
     tox_callback_namechange(m, print_nickchange, NULL);
     tox_callback_statusmessage(m, print_statuschange, NULL);
+    tox_callback_group_invite(m, print_invite, NULL);
+    tox_callback_group_message(m, print_groupmessage, NULL);
 
     initscr();
     noecho();
diff --git a/testing/nTox.h b/testing/nTox.h
index a72ce0c2..2cd5db09 100644
--- a/testing/nTox.h
+++ b/testing/nTox.h
@@ -31,7 +31,6 @@
 #include <ctype.h>
 
 #include "../toxcore/tox.h"
-
 #define STRING_LENGTH 256
 #define HISTORY 50
 #define PUB_KEY_BYTES 32
diff --git a/toxcore/DHT.c b/toxcore/DHT.c
index 774dd6f2..0b866940 100644
--- a/toxcore/DHT.c
+++ b/toxcore/DHT.c
@@ -498,7 +498,7 @@ static int getnodes(DHT *dht, IP_Port ip_port, uint8_t *public_key, uint8_t *cli
     uint8_t plain[sizeof(ping_id) + CLIENT_ID_SIZE];
     uint8_t encrypt[sizeof(ping_id) + CLIENT_ID_SIZE + ENCRYPTION_PADDING];
     uint8_t nonce[crypto_box_NONCEBYTES];
-    random_nonce(nonce);
+    new_nonce(nonce);
 
     memcpy(plain, &ping_id, sizeof(ping_id));
     memcpy(plain + sizeof(ping_id), client_id, CLIENT_ID_SIZE);
@@ -540,7 +540,7 @@ static int sendnodes(DHT *dht, IP_Port ip_port, uint8_t *public_key, uint8_t *cl
     uint8_t plain[sizeof(ping_id) + sizeof(Node_format) * MAX_SENT_NODES];
     uint8_t encrypt[sizeof(ping_id) + sizeof(Node_format) * MAX_SENT_NODES + ENCRYPTION_PADDING];
     uint8_t nonce[crypto_box_NONCEBYTES];
-    random_nonce(nonce);
+    new_nonce(nonce);
 
     memcpy(plain, &ping_id, sizeof(ping_id));
     memcpy(plain + sizeof(ping_id), nodes_list, num_nodes * sizeof(Node_format));
diff --git a/toxcore/LAN_discovery.h b/toxcore/LAN_discovery.h
index 78990936..3e9d9de5 100644
--- a/toxcore/LAN_discovery.h
+++ b/toxcore/LAN_discovery.h
@@ -35,6 +35,8 @@
 #include <linux/netdevice.h>
 #endif
 
+/* Interval in seconds between LAN discovery packet sending. */
+#define LAN_DISCOVERY_INTERVAL 60
 
 /* Send a LAN discovery pcaket to the broadcast address with port port. */
 int send_LANdiscovery(uint16_t port, Net_Crypto *c);
diff --git a/toxcore/Messenger.c b/toxcore/Messenger.c
index e17c9344..682cb1be 100644
--- a/toxcore/Messenger.c
+++ b/toxcore/Messenger.c
@@ -673,6 +673,40 @@ static int group_num(Messenger *m, uint8_t *group_public_key)
     return -1;
 }
 
+/* Set the callback for group invites.
+ *
+ *  Function(Messenger *m, int friendnumber, uint8_t *group_public_key, void *userdata)
+ */
+void m_callback_group_invite(Messenger *m, void (*function)(Messenger *m, int, uint8_t *, void *), void *userdata)
+{
+    m->group_invite = function;
+    m->group_invite_userdata = userdata;
+}
+
+/* Set the callback for group messages.
+ *
+ *  Function(Messenger *m, int groupnumber, uint8_t * message, uint16_t length, void *userdata)
+ */
+void m_callback_group_message(Messenger *m, void (*function)(Messenger *m, int, uint8_t *, uint16_t, void *),
+                              void *userdata)
+{
+    m->group_message = function;
+    m->group_message_userdata = userdata;
+}
+static void group_message_function(Group_Chat *chat, int peer_number, uint8_t *message, uint16_t length, void *userdata)
+{
+    Messenger *m = userdata;
+    uint32_t i;
+
+    for (i = 0; i < m->numchats; ++i) { //TODO: remove this
+        if (m->chats[i] == chat)
+            break;
+    }
+
+    if (m->group_message)
+        (*m->group_message)(m, i, message, length, m->group_invite_userdata);
+}
+
 /* Creates a new groupchat and puts it in the chats array.
  *
  * return group number on success.
@@ -689,6 +723,7 @@ int add_groupchat(Messenger *m)
             if (newchat == NULL)
                 return -1;
 
+            callback_groupmessage(newchat, &group_message_function, m);
             m->chats[i] = newchat;
             return i;
         }
@@ -705,6 +740,8 @@ int add_groupchat(Messenger *m)
     if (temp[m->numchats] == NULL)
         return -1;
 
+    m->chats = temp;
+    callback_groupmessage(temp[m->numchats], &group_message_function, m);
     ++m->numchats;
     return (m->numchats - 1);
 }
@@ -714,7 +751,7 @@ int add_groupchat(Messenger *m)
  * return 0 on success.
  * return -1 if failure.
  */
-static int del_groupchat(Messenger *m, int groupnumber)
+int del_groupchat(Messenger *m, int groupnumber)
 {
     if ((unsigned int)groupnumber >= m->numchats)
         return -1;
@@ -748,9 +785,42 @@ static int del_groupchat(Messenger *m, int groupnumber)
     return 0;
 }
 
+/* return 1 if that friend was invited to the group
+ * return 0 if the friend was not or error.
+ */
+static uint8_t group_invited(Messenger *m, int friendnumber, int groupnumber)
+{
+    //TODO: this function;
+    return 1;
+}
+
+/* invite friendnumber to groupnumber
+ * return 0 on success
+ * return -1 on failure
+ */
+int invite_friend(Messenger *m, int friendnumber, int groupnumber)
+{
+    if (friend_not_valid(m, friendnumber) || (unsigned int)groupnumber >= m->numchats)
+        return -1;
+
+    if (m->chats == NULL)
+        return -1;
+
+    if (m->friendlist[friendnumber].status == NOFRIEND || m->chats[groupnumber] == NULL)
+        return -1;
+
+    //TODO: store invited friends.
+    if (write_cryptpacket_id(m, friendnumber, PACKET_ID_INVITE_GROUPCHAT, m->chats[groupnumber]->self_public_key,
+                             crypto_box_PUBLICKEYBYTES) == 0)
+        return -1;
+
+    return 0;
+}
+
+
 /* Join a group (you need to have been invited first.)
  *
- * returns 0 on success
+ * returns group number on success
  * returns -1 on failure.
  */
 int join_groupchat(Messenger *m, int friendnumber, uint8_t *friend_group_public_key)
@@ -770,12 +840,34 @@ int join_groupchat(Messenger *m, int friendnumber, uint8_t *friend_group_public_
     if (write_cryptpacket_id(m, friendnumber, PACKET_ID_JOIN_GROUPCHAT, data, sizeof(data))) {
         chat_bootstrap_nonlazy(m->chats[groupnum], get_friend_ipport(m, friendnumber),
                                friend_group_public_key); //TODO: check if ip returned is zero?
-        return 0;
+        return groupnum;
     }
 
     return -1;
 }
 
+/* send a group message
+ * return 0 on success
+ * return -1 on failure
+ */
+
+int group_message_send(Messenger *m, int groupnumber, uint8_t *message, uint32_t length)
+{
+    if ((unsigned int)groupnumber >= m->numchats)
+        return -1;
+
+    if (m->chats == NULL)
+        return -1;
+
+    if (m->chats[groupnumber] == NULL)
+        return -1;
+
+    if (group_sendmessage(m->chats[groupnumber], message, length) > 0)
+        return 0;
+
+    return -1;
+}
+
 static int handle_group(void *object, IP_Port source, uint8_t *packet, uint32_t length)
 {
     Messenger *m = object;
@@ -809,8 +901,6 @@ static void do_allgroupchats(Messenger *m)
 
 /*********************************/
 
-/* Interval in seconds between LAN discovery packet sending. */
-#define LAN_DISCOVERY_INTERVAL 60
 #define PORT 33445
 
 /* Send a LAN discovery packet every LAN_DISCOVERY_INTERVAL seconds. */
@@ -1064,6 +1154,29 @@ void doFriends(Messenger *m)
 
                         break;
                     }
+
+                    case PACKET_ID_INVITE_GROUPCHAT: {
+                        if (data_length != crypto_box_PUBLICKEYBYTES)
+                            break;
+
+                        if (m->group_invite)
+                            (*m->group_invite)(m, i, data, m->group_invite_userdata);
+                    }
+
+                    case PACKET_ID_JOIN_GROUPCHAT: {
+                        if (data_length != crypto_box_PUBLICKEYBYTES * 2)
+                            break;
+
+                        int groupnum = group_num(m, data);
+
+                        if (groupnum == -1)
+                            break;
+
+                        if (!group_invited(m, i, groupnum))
+                            break;
+
+                        group_newpeer(m->chats[groupnum], data + crypto_box_PUBLICKEYBYTES);
+                    }
                 }
             } else {
                 if (is_cryptoconnected(m->net_crypto,
diff --git a/toxcore/Messenger.h b/toxcore/Messenger.h
index 7649a779..0656c736 100644
--- a/toxcore/Messenger.h
+++ b/toxcore/Messenger.h
@@ -157,7 +157,10 @@ typedef struct Messenger {
     void *friend_statuschange_userdata;
     void (*friend_connectionstatuschange)(struct Messenger *m, int, uint8_t, void *);
     void *friend_connectionstatuschange_userdata;
-
+    void (*group_invite)(struct Messenger *m, int, uint8_t *, void *);
+    void *group_invite_userdata;
+    void (*group_message)(struct Messenger *m, int, uint8_t *, uint16_t, void *);
+    void *group_message_userdata;
 
 } Messenger;
 
@@ -369,6 +372,57 @@ void m_callback_read_receipt(Messenger *m, void (*function)(Messenger *m, int, u
  */
 void m_callback_connectionstatus(Messenger *m, void (*function)(Messenger *m, int, uint8_t, void *), void *userdata);
 
+/**********GROUP CHATS************/
+
+/* Set the callback for group invites.
+ *
+ *  Function(Messenger *m, int friendnumber, uint8_t *group_public_key, void *userdata)
+ */
+void m_callback_group_invite(Messenger *m, void (*function)(Messenger *m, int, uint8_t *, void *), void *userdata);
+
+/* Set the callback for group messages.
+ *
+ *  Function(Messenger *m, int groupnumber, uint8_t * message, uint16_t length, void *userdata)
+ */
+void m_callback_group_message(Messenger *m, void (*function)(Messenger *m, int, uint8_t *, uint16_t, void *),
+                              void *userdata);
+
+/* Creates a new groupchat and puts it in the chats array.
+ *
+ * return group number on success.
+ * return -1 on failure.
+ */
+int add_groupchat(Messenger *m);
+
+/* Delete a groupchat from the chats array.
+ *
+ * return 0 on success.
+ * return -1 if failure.
+ */
+int del_groupchat(Messenger *m, int groupnumber);
+
+/* invite friendnumber to groupnumber
+ * return 0 on success
+ * return -1 on failure
+ */
+int invite_friend(Messenger *m, int friendnumber, int groupnumber);
+
+/* Join a group (you need to have been invited first.)
+ *
+ * returns group number on success
+ * returns -1 on failure.
+ */
+int join_groupchat(Messenger *m, int friendnumber, uint8_t *friend_group_public_key);
+
+/* send a group message
+ * return 0 on success
+ * return -1 on failure
+ */
+
+int group_message_send(Messenger *m, int groupnumber, uint8_t *message, uint32_t length);
+
+/*********************************/
+
 /* Run this at startup.
  *  return allocated instance of Messenger on success.
  *  return 0 if there are problems.
diff --git a/toxcore/group_chats.h b/toxcore/group_chats.h
index 535b46db..78a5488c 100644
--- a/toxcore/group_chats.h
+++ b/toxcore/group_chats.h
@@ -77,6 +77,7 @@ void callback_groupmessage(Group_Chat *chat, void (*function)(Group_Chat *chat,
 /*
  * Send a message to the group.
  *
+ * returns the number of peers it has sent it to.
  */
 uint32_t group_sendmessage(Group_Chat *chat, uint8_t *message, uint32_t length);
 
diff --git a/toxcore/net_crypto.c b/toxcore/net_crypto.c
index a182bb53..8163701e 100644
--- a/toxcore/net_crypto.c
+++ b/toxcore/net_crypto.c
@@ -145,14 +145,26 @@ static void increment_nonce(uint8_t *nonce)
 /* Fill the given nonce with random bytes. */
 void random_nonce(uint8_t *nonce)
 {
-    uint32_t i, temp;
+    randombytes(nonce, crypto_box_NONCEBYTES);
+}
+
+
+static uint8_t base_nonce[crypto_box_NONCEBYTES];
+static uint8_t nonce_set = 0;
 
-    for (i = 0; i < crypto_box_NONCEBYTES / 4; ++i) {
-        temp = random_int();
-        memcpy(nonce + 4 * i, &temp, 4);
+/*Gives a nonce guaranteed to be different from previous ones.*/
+void new_nonce(uint8_t *nonce)
+{
+    if (nonce_set == 0) {
+        random_nonce(base_nonce);
+        nonce_set = 1;
     }
+
+    increment_nonce(base_nonce);
+    memcpy(nonce, base_nonce, crypto_box_NONCEBYTES);
 }
 
+
 /*  return 0 if there is no received data in the buffer.
  *  return -1  if the packet was discarded.
  *  return length of received data if successful.
@@ -237,7 +249,7 @@ int create_request(uint8_t *send_public_key, uint8_t *send_secret_key, uint8_t *
     uint8_t temp[MAX_DATA_SIZE];
     memcpy(temp + 1, data, length);
     temp[0] = request_id;
-    random_nonce(nonce);
+    new_nonce(nonce);
     int len = encrypt_data(recv_public_key, send_secret_key, nonce, temp, length + 1,
                            1 + crypto_box_PUBLICKEYBYTES * 2 + crypto_box_NONCEBYTES + packet);
 
@@ -336,7 +348,7 @@ static int send_cryptohandshake(Net_Crypto *c, int connection_id, uint8_t *publi
     uint8_t temp[crypto_box_NONCEBYTES + crypto_box_PUBLICKEYBYTES];
     uint8_t nonce[crypto_box_NONCEBYTES];
 
-    random_nonce(nonce);
+    new_nonce(nonce);
     memcpy(temp, secret_nonce, crypto_box_NONCEBYTES);
     memcpy(temp + crypto_box_NONCEBYTES, session_key, crypto_box_PUBLICKEYBYTES);
 
diff --git a/toxcore/net_crypto.h b/toxcore/net_crypto.h
index e5dfcae0..55c1e3e3 100644
--- a/toxcore/net_crypto.h
+++ b/toxcore/net_crypto.h
@@ -115,6 +115,9 @@ int decrypt_data_fast(uint8_t *enc_key, uint8_t *nonce,
 /* Fill the given nonce with random bytes. */
 void random_nonce(uint8_t *nonce);
 
+/*Gives a nonce guaranteed to be different from previous ones.*/
+void new_nonce(uint8_t *nonce);
+
 /*  return 0 if there is no received data in the buffer.
  *  return -1  if the packet was discarded.
  *  return length of received data if successful.
diff --git a/toxcore/network.c b/toxcore/network.c
index ed3dff8a..c6c4965e 100644
--- a/toxcore/network.c
+++ b/toxcore/network.c
@@ -49,7 +49,6 @@ uint64_t current_time(void)
 }
 
 /*  return a random number.
- * NOTE: This function should probably not be used where cryptographic randomness is absolutely necessary.
  */
 uint32_t random_int(void)
 {
@@ -57,7 +56,9 @@ uint32_t random_int(void)
     /* NOTE: this function comes from libsodium. */
     return randombytes_random();
 #else
-    return random();
+    uint32_t randnum;
+    randombytes((uint8_t *)&randnum , sizeof(randnum));
+    return randnum;
 #endif
 }
 
diff --git a/toxcore/network.h b/toxcore/network.h
index 98307e5b..e1f9b212 100644
--- a/toxcore/network.h
+++ b/toxcore/network.h
@@ -57,6 +57,7 @@
 #include <sodium.h>
 #else
 #include <crypto_box.h>
+#include <randombytes.h>
 #define crypto_box_MACBYTES (crypto_box_ZEROBYTES - crypto_box_BOXZEROBYTES)
 #endif
 
@@ -130,7 +131,6 @@ typedef struct {
 uint64_t current_time(void);
 
 /*  return a random number.
- * NOTE: this function should probably not be used where cryptographic randomness is absolutely necessary.
  */
 uint32_t random_int(void);
 
diff --git a/toxcore/ping.c b/toxcore/ping.c
index 3b39d911..3a189f23 100644
--- a/toxcore/ping.c
+++ b/toxcore/ping.c
@@ -135,7 +135,7 @@ int send_ping_request(void *ping, Net_Crypto *c, IP_Port ipp, uint8_t *client_id
 
     pk[0] = NET_PACKET_PING_REQUEST;
     id_cpy(pk + 1, c->self_public_key);     // Our pubkey
-    random_nonce(pk + 1 + CLIENT_ID_SIZE); // Generate random nonce
+    new_nonce(pk + 1 + CLIENT_ID_SIZE); // Generate new nonce
 
     // Encrypt ping_id using recipient privkey
     rc = encrypt_data(client_id,
@@ -160,7 +160,7 @@ int send_ping_response(Net_Crypto *c, IP_Port ipp, uint8_t *client_id, uint64_t
 
     pk[0] = NET_PACKET_PING_RESPONSE;
     id_cpy(pk + 1, c->self_public_key);     // Our pubkey
-    random_nonce(pk + 1 + CLIENT_ID_SIZE); // Generate random nonce
+    new_nonce(pk + 1 + CLIENT_ID_SIZE); // Generate new nonce
 
     // Encrypt ping_id using recipient privkey
     rc = encrypt_data(client_id,
diff --git a/toxcore/tox.c b/toxcore/tox.c
index 54bbd9f0..417f1af3 100644
--- a/toxcore/tox.c
+++ b/toxcore/tox.c
@@ -366,6 +366,81 @@ void tox_callback_connectionstatus(void *tox, void (*function)(Messenger *tox, i
     m_callback_connectionstatus(m, function, userdata);
 }
 
+/**********GROUP CHAT FUNCTIONS: WARNING WILL BREAK A LOT************/
+
+/* Set the callback for group invites.
+ *
+ *  Function(Tox *tox, int friendnumber, uint8_t *group_public_key, void *userdata)
+ */
+void tox_callback_group_invite(void *tox, void (*function)(Messenger *tox, int, uint8_t *, void *), void *userdata)
+{
+    Messenger *m = tox;
+    m_callback_group_invite(m, function, userdata);
+}
+/* Set the callback for group messages.
+ *
+ *  Function(Tox *tox, int groupnumber, uint8_t * message, uint16_t length, void *userdata)
+ */
+void tox_callback_group_message(void *tox, void (*function)(Messenger *tox, int, uint8_t *, uint16_t, void *),
+                                void *userdata)
+{
+    Messenger *m = tox;
+    m_callback_group_message(m, function, userdata);
+}
+/* Creates a new groupchat and puts it in the chats array.
+ *
+ * return group number on success.
+ * return -1 on failure.
+ */
+int tox_add_groupchat(void *tox)
+{
+    Messenger *m = tox;
+    return add_groupchat(m);
+}
+/* Delete a groupchat from the chats array.
+ *
+ * return 0 on success.
+ * return -1 if failure.
+ */
+int tox_del_groupchat(void *tox, int groupnumber)
+{
+    Messenger *m = tox;
+    return del_groupchat(m, groupnumber);
+}
+/* invite friendnumber to groupnumber
+ * return 0 on success
+ * return -1 on failure
+ */
+int tox_invite_friend(void *tox, int friendnumber, int groupnumber)
+{
+    Messenger *m = tox;
+    return invite_friend(m, friendnumber, groupnumber);
+}
+/* Join a group (you need to have been invited first.)
+ *
+ * returns group number on success
+ * returns -1 on failure.
+ */
+int tox_join_groupchat(void *tox, int friendnumber, uint8_t *friend_group_public_key)
+{
+    Messenger *m = tox;
+    return join_groupchat(m, friendnumber, friend_group_public_key);
+}
+
+/* send a group message
+ * return 0 on success
+ * return -1 on failure
+ */
+int tox_group_message_send(void *tox, int groupnumber, uint8_t *message, uint32_t length)
+{
+    Messenger *m = tox;
+    return group_message_send(m, groupnumber, message, length);
+}
+
+
+
+/******************END OF GROUP CHAT FUNCTIONS************************/
+
 /* Use this function to bootstrap the client.
  * Sends a get nodes request to the given node with ip port and public_key.
  */
diff --git a/toxcore/tox.h b/toxcore/tox.h
index 811e798b..6d5db49f 100644
--- a/toxcore/tox.h
+++ b/toxcore/tox.h
@@ -289,6 +289,59 @@ void tox_callback_read_receipt(Tox *tox, void (*function)(Tox *tox, int, uint32_
  */
 void tox_callback_connectionstatus(Tox *tox, void (*function)(Tox *tox, int, uint8_t, void *), void *userdata);
 
+/**********GROUP CHAT FUNCTIONS: WARNING WILL BREAK A LOT************/
+
+/* Set the callback for group invites.
+ *
+ *  Function(Tox *tox, int friendnumber, uint8_t *group_public_key, void *userdata)
+ */
+void tox_callback_group_invite(Tox *tox, void (*function)(Tox *tox, int, uint8_t *, void *), void *userdata);
+
+/* Set the callback for group messages.
+ *
+ *  Function(Tox *tox, int groupnumber, uint8_t * message, uint16_t length, void *userdata)
+ */
+void tox_callback_group_message(Tox *tox, void (*function)(Tox *tox, int, uint8_t *, uint16_t, void *),
+                                void *userdata);
+
+/* Creates a new groupchat and puts it in the chats array.
+ *
+ * return group number on success.
+ * return -1 on failure.
+ */
+int tox_add_groupchat(Tox *tox);
+
+/* Delete a groupchat from the chats array.
+ *
+ * return 0 on success.
+ * return -1 if failure.
+ */
+int tox_del_groupchat(Tox *tox, int groupnumber);
+
+/* invite friendnumber to groupnumber
+ * return 0 on success
+ * return -1 on failure
+ */
+int tox_invite_friend(Tox *tox, int friendnumber, int groupnumber);
+
+/* Join a group (you need to have been invited first.)
+ *
+ * returns group number on success
+ * returns -1 on failure.
+ */
+int tox_join_groupchat(Tox *tox, int friendnumber, uint8_t *friend_group_public_key);
+
+
+/* send a group message
+ * return 0 on success
+ * return -1 on failure
+ */
+int tox_group_message_send(Tox *tox, int groupnumber, uint8_t *message, uint32_t length);
+
+
+
+/******************END OF GROUP CHAT FUNCTIONS************************/
+
 /* Use this function to bootstrap the client.
  * Sends a get nodes request to the given node with ip port and public_key.
  */