8 files changed, 353 insertions, 11 deletions

diff --git a/other/DHT_bootstrap.c b/other/DHT_bootstrap.c
index e6e8d59f..246ae818 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"
 
@@ -140,6 +141,9 @@ 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");
@@ -147,6 +151,10 @@ 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 1e83f507..70dc5c77 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[])
 {
     if (argc < 4) {
@@ -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/toxcore/LAN_discovery.h b/toxcore/LAN_discovery.h
index a0789956..3e9d9de5 100644
--- a/toxcore/LAN_discovery.h
+++ b/toxcore/LAN_discovery.h
@@ -35,7 +35,7 @@
 #include <linux/netdevice.h>
 #endif
 
-/* standard interval in seconds between LAN discovery packet sending. */
+/* 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. */
diff --git a/toxcore/Messenger.c b/toxcore/Messenger.c
index d228fcc2..8d0b149f 100644
--- a/toxcore/Messenger.c
+++ b/toxcore/Messenger.c
@@ -674,6 +674,40 @@ 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.
@@ -690,6 +724,7 @@ int add_groupchat(Messenger *m)
             if (newchat == NULL)
                 return -1;
 
+            callback_groupmessage(newchat, &group_message_function, m);
             m->chats[i] = newchat;
             return i;
         }
@@ -706,6 +741,8 @@ 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);
 }
@@ -715,7 +752,7 @@ 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;
@@ -749,9 +786,42 @@ 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)
@@ -771,12 +841,34 @@ 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;
@@ -810,9 +902,6 @@ static void do_allgroupchats(Messenger *m)
 
 /*********************************/
 
-/* Interval in seconds between LAN discovery packet sending. */
-#define LAN_DISCOVERY_INTERVAL 60
-
 /* Send a LAN discovery packet every LAN_DISCOVERY_INTERVAL seconds. */
 static void LANdiscovery(Messenger *m)
 {
@@ -1065,6 +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 b7032bbd..bfcc69df 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/tox.c b/toxcore/tox.c
index 3eb80d22..68b1e6e9 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 these functions 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 4c597250..c52a644f 100644
--- a/toxcore/tox.h
+++ b/toxcore/tox.h
@@ -342,6 +342,59 @@ 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 these two functions to bootstrap the client.
  */