toxcore/toxcore/tox.c

/* tox.c
 *
 * The Tox public API.
 *
 *  Copyright (C) 2013 Tox project All Rights Reserved.
 *
 *  This file is part of Tox.
 *
 *  Tox is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Tox is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Tox.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "Messenger.h"
#include "logger.h"

#define __TOX_DEFINED__
typedef struct Messenger Tox;

#include "tox.h"

/*
 * returns a FRIEND_ADDRESS_SIZE byte address to give to others.
 * Format: [client_id (32 bytes)][nospam number (4 bytes)][checksum (2 bytes)]
 *
 */
void tox_get_address(const Tox *tox, uint8_t *address)
{
    const Messenger *m = tox;
    getaddress(m, address);
}

/*
 * Add a friend.
 * Set the data that will be sent along with friend request.
 * address is the address of the friend (returned by getaddress of the friend you wish to add) it must be FRIEND_ADDRESS_SIZE bytes. TODO: add checksum.
 * data is the data and length is the length.
 *
 *  return the friend number if success.
 *  return FA_TOOLONG if message length is too long.
 *  return FAERR_NOMESSAGE if no message (message length must be >= 1 byte).
 *  return FAERR_OWNKEY if user's own key.
 *  return FAERR_ALREADYSENT if friend request already sent or already a friend.
 *  return FAERR_UNKNOWN for unknown error.
 *  return FAERR_BADCHECKSUM if bad checksum in address.
 *  return FAERR_SETNEWNOSPAM if the friend was already there but the nospam was different.
 *  (the nospam for that friend was set to the new one).
 *  return FAERR_NOMEM if increasing the friend list size fails.
 */
int32_t tox_add_friend(Tox *tox, const uint8_t *address, const uint8_t *data, uint16_t length)
{
    Messenger *m = tox;
    return m_addfriend(m, address, data, length);
}

/* Add a friend without sending a friendrequest.
 *
 *  return the friend number if success.
 *  return -1 if failure.
 */
int32_t tox_add_friend_norequest(Tox *tox, const uint8_t *client_id)
{
    Messenger *m = tox;
    return m_addfriend_norequest(m, client_id);
}

/*  return the friend number associated to that client id.
 *  return -1 if no such friend.
 */
int32_t tox_get_friend_number(const Tox *tox, const uint8_t *client_id)
{
    const Messenger *m = tox;
    return getfriend_id(m, client_id);
}

/* Copies the public key associated to that friend id into client_id buffer.
 * Make sure that client_id is of size CLIENT_ID_SIZE.
 *
 *  return 0 if success.
 *  return -1 if failure.
 */
int tox_get_client_id(const Tox *tox, int32_t friendnumber, uint8_t *client_id)
{
    const Messenger *m = tox;
    return getclient_id(m, friendnumber, client_id);
}

/* Remove a friend. */
int tox_del_friend(Tox *tox, int32_t friendnumber)
{
    Messenger *m = tox;
    return m_delfriend(m, friendnumber);
}

/* Checks friend's connecting status.
 *
 *  return 1 if friend is connected to us (Online).
 *  return 0 if friend is not connected to us (Offline).
 *  return -1 on failure.
 */
int tox_get_friend_connection_status(const Tox *tox, int32_t friendnumber)
{
    const Messenger *m = tox;
    return m_get_friend_connectionstatus(m, friendnumber);
}

/* Checks if there exists a friend with given friendnumber.
 *
 *  return 1 if friend exists.
 *  return 0 if friend doesn't exist.
 */
int tox_friend_exists(const Tox *tox, int32_t friendnumber)
{
    const Messenger *m = tox;
    return m_friend_exists(m, friendnumber);
}

/* Send a text chat message to an online friend.
 *  return the message id if packet was successfully put into the send queue.
 *  return 0 if it was not.
 *
 *  You will want to retain the return value, it will be passed to your read_receipt callback
 *  if one is received.
 */
uint32_t tox_send_message(Tox *tox, int32_t friendnumber, const uint8_t *message, uint32_t length)
{
    Messenger *m = tox;
    return m_sendmessage(m, friendnumber, message, length);
}

/* Send an action to an online friend.
 *
 *  return the message id if packet was successfully put into the send queue.
 *  return 0 if it was not.
 *
 *  You will want to retain the return value, it will be passed to your read_receipt callback
 *  if one is received.
 */
uint32_t tox_send_action(Tox *tox, int32_t friendnumber, const uint8_t *action, uint32_t length)
{
    Messenger *m = tox;
    return m_sendaction(m, friendnumber, action, length);
}

/* Set our nickname.
 * name must be a string of maximum MAX_NAME_LENGTH length.
 * length must be at least 1 byte.
 * length is the length of name with the NULL terminator.
 *
 *  return 0 if success.
 *  return -1 if failure.
 */
int tox_set_name(Tox *tox, const uint8_t *name, uint16_t length)
{
    Messenger *m = tox;
    return setname(m, name, length);
}

/* Get your nickname.
 * m -  The messenger context to use.
 * name - Pointer to a string for the name. (must be at least MAX_NAME_LENGTH)
 *
 *  return length of the name.
 *  return 0 on error.
 */
uint16_t tox_get_self_name(const Tox *tox, uint8_t *name)
{
    const Messenger *m = tox;
    return getself_name(m, name);
}

/* Get name of friendnumber and put it in name.
 * name needs to be a valid memory location with a size of at least MAX_NAME_LENGTH (128) bytes.
 *
 *  return length of name (with the NULL terminator) if success.
 *  return -1 if failure.
 */
int tox_get_name(const Tox *tox, int32_t friendnumber, uint8_t *name)
{
    const Messenger *m = tox;
    return getname(m, friendnumber, name);
}

/*  returns the length of name on success.
 *  returns -1 on failure.
 */
int tox_get_name_size(const Tox *tox, int32_t friendnumber)
{
    const Messenger *m = tox;
    return m_get_name_size(m, friendnumber);
}

int tox_get_self_name_size(const Tox *tox)
{
    const Messenger *m = tox;
    return m_get_self_name_size(m);
}

/* Set our user status;
 * you are responsible for freeing status after.
 *
 *  return 0 on success, -1 on failure.
 */
int tox_set_status_message(Tox *tox, const uint8_t *status, uint16_t length)
{
    Messenger *m = tox;
    return m_set_statusmessage(m, status, length);
}

int tox_set_user_status(Tox *tox, uint8_t status)
{
    Messenger *m = tox;
    return m_set_userstatus(m, status);
}

/*  returns the length of status message on success.
 *  returns -1 on failure.
 */
int tox_get_status_message_size(const Tox *tox, int32_t friendnumber)
{
    const Messenger *m = tox;
    return m_get_statusmessage_size(m, friendnumber);
}

int tox_get_self_status_message_size(const Tox *tox)
{
    const Messenger *m = tox;
    return m_get_self_statusmessage_size(m);
}

/* Copy friendnumber's status message into buf, truncating if size is over maxlen.
 * Get the size you need to allocate from m_get_statusmessage_size.
 * The self variant will copy our own status message.
 */
int tox_get_status_message(const Tox *tox, int32_t friendnumber, uint8_t *buf, uint32_t maxlen)
{
    const Messenger *m = tox;
    return m_copy_statusmessage(m, friendnumber, buf, maxlen);
}

int tox_get_self_status_message(const Tox *tox, uint8_t *buf, uint32_t maxlen)
{
    const Messenger *m = tox;
    return m_copy_self_statusmessage(m, buf, maxlen);
}

/* Return one of USERSTATUS values.
 * Values unknown to your application should be represented as USERSTATUS_NONE.
 * As above, the self variant will return our own USERSTATUS.
 * If friendnumber is invalid, this shall return USERSTATUS_INVALID.
 */
uint8_t tox_get_user_status(const Tox *tox, int32_t friendnumber)
{
    const Messenger *m = tox;
    return m_get_userstatus(m, friendnumber);
}

uint8_t tox_get_self_user_status(const Tox *tox)
{
    const Messenger *m = tox;
    return m_get_self_userstatus(m);
}

/* returns timestamp of last time friendnumber was seen online, or 0 if never seen.
 * returns -1 on error.
 */
uint64_t tox_get_last_online(const Tox *tox, int32_t friendnumber)
{
    const Messenger *m = tox;
    return m_get_last_online(m, friendnumber);
}

/* Set our typing status for a friend.
 * You are responsible for turning it on or off.
 *
 * returns 0 on success.
 * returns -1 on failure.
 */
int tox_set_user_is_typing(Tox *tox, int32_t friendnumber, uint8_t is_typing)
{
    Messenger *m = tox;
    return m_set_usertyping(m, friendnumber, is_typing);
}

/* Get the typing status of a friend.
 *
 * returns 0 if friend is not typing.
 * returns 1 if friend is typing.
 */
uint8_t tox_get_is_typing(const Tox *tox, int32_t friendnumber)
{
    const Messenger *m = tox;
    return m_get_istyping(m, friendnumber);
}

/* Return the number of friends in the instance m.
 * You should use this to determine how much memory to allocate
 * for copy_friendlist. */
uint32_t tox_count_friendlist(const Tox *tox)
{
    const Messenger *m = tox;
    return count_friendlist(m);
}

/* Return the number of online friends in the instance m. */
uint32_t tox_get_num_online_friends(const Tox *tox)
{
    const Messenger *m = tox;
    return get_num_online_friends(m);
}

/* Copy a list of valid friend IDs into the array out_list.
 * If out_list is NULL, returns 0.
 * Otherwise, returns the number of elements copied.
 * If the array was too small, the contents
 * of out_list will be truncated to list_size. */
uint32_t tox_get_friendlist(const Tox *tox, int32_t *out_list, uint32_t list_size)
{
    const Messenger *m = tox;
    return copy_friendlist(m, out_list, list_size);
}

/* 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 tox_callback_friend_request(Tox *tox, void (*function)(Tox *tox, const uint8_t *, const uint8_t *, uint16_t,
                                 void *), void *userdata)
{
    Messenger *m = tox;
    m_callback_friendrequest(m, function, userdata);
}


/* Set the function that will be executed when a message from a friend is received.
 *  Function format is: function(int32_t friendnumber, uint8_t * message, uint32_t length)
 */
void tox_callback_friend_message(Tox *tox, void (*function)(Messenger *tox, int32_t, const uint8_t *, uint16_t, void *),
                                 void *userdata)
{
    Messenger *m = tox;
    m_callback_friendmessage(m, function, userdata);
}

/* Set the function that will be executed when an action from a friend is received.
 *  function format is: function(int32_t friendnumber, uint8_t * action, uint32_t length)
 */
void tox_callback_friend_action(Tox *tox, void (*function)(Messenger *tox, int32_t, const uint8_t *, uint16_t, void *),
                                void *userdata)
{
    Messenger *m = tox;
    m_callback_action(m, function, userdata);
}

/* Set the callback for name changes.
 *  function(int32_t friendnumber, uint8_t *newname, uint16_t length)
 *  You are not responsible for freeing newname.
 */
void tox_callback_name_change(Tox *tox, void (*function)(Messenger *tox, int32_t, const uint8_t *, uint16_t, void *),
                              void *userdata)
{
    Messenger *m = tox;
    m_callback_namechange(m, function, userdata);
}

/* Set the callback for status message changes.
 *  function(int32_t friendnumber, uint8_t *newstatus, uint16_t length)
 *  You are not responsible for freeing newstatus.
 */
void tox_callback_status_message(Tox *tox, void (*function)(Messenger *tox, int32_t, const uint8_t *, uint16_t, void *),
                                 void *userdata)
{
    Messenger *m = tox;
    m_callback_statusmessage(m, function, userdata);
}

/* Set the callback for status type changes.
 *  function(int32_t friendnumber, USERSTATUS kind)
 */
void tox_callback_user_status(Tox *tox, void (*function)(Messenger *tox, int32_t, uint8_t, void *),
                              void *userdata)
{
    Messenger *m = tox;
    m_callback_userstatus(m, function, userdata);
}

/* Set the callback for typing changes.
 *  function (int32_t friendnumber, uint8_t is_typing)
 */
void tox_callback_typing_change(Tox *tox, void (*function)(Messenger *tox, int32_t, uint8_t, void *), void *userdata)
{
    Messenger *m = tox;
    m_callback_typingchange(m, function, userdata);
}

/* Set the callback for read receipts.
 *  function(int32_t friendnumber, uint32_t receipt)
 *
 *  If you are keeping a record of returns from m_sendmessage;
 *  receipt might be one of those values, meaning the message
 *  has been received on the other side.
 *  Since core doesn't track ids for you, receipt may not correspond to any message.
 *  in that case, you should discard it.
 */
void tox_callback_read_receipt(Tox *tox, void (*function)(Messenger *tox, int32_t, uint32_t, void *), void *userdata)
{
    Messenger *m = tox;
    m_callback_read_receipt(m, function, userdata);
}

/* Set the callback for connection status changes.
 *  function(int32_t friendnumber, uint8_t status)
 *
 *  Status:
 *    0 -- friend went offline after being previously online
 *    1 -- friend went online
 *
 *  NOTE: this callback is not called when adding friends, thus the "after
 *  being previously online" part. It's assumed that when adding friends,
 *  their connection status is offline.
 */
void tox_callback_connection_status(Tox *tox, void (*function)(Messenger *tox, int32_t, uint8_t, void *),
                                    void *userdata)
{
    Messenger *m = tox;
    m_callback_connectionstatus(m, function, userdata);
}

/**********ADVANCED FUNCTIONS (If you don't know what they do you can safely ignore them.)  ************/

/* Functions to get/set the nospam part of the id.
 */
uint32_t tox_get_nospam(const Tox *tox)
{
    const Messenger *m = tox;
    return get_nospam(&(m->fr));
}

void tox_set_nospam(Tox *tox, uint32_t nospam)
{
    Messenger *m = tox;
    set_nospam(&(m->fr), nospam);
}

/* Copy the public and secret key from the Tox object.
   public_key and secret_key must be 32 bytes big.
   if the pointer is NULL, no data will be copied to it.*/
void tox_get_keys(Tox *tox, uint8_t *public_key, uint8_t *secret_key)
{
    Messenger *m = tox;

    if (public_key)
        memcpy(public_key, m->net_crypto->self_public_key, crypto_box_PUBLICKEYBYTES);

    if (secret_key)
        memcpy(secret_key, m->net_crypto->self_secret_key, crypto_box_SECRETKEYBYTES);
}

/* Set handlers for custom lossy packets.
 * Set the function to be called when friend sends us a lossy packet starting with byte.
 * byte must be in the 200-254 range.
 *
 * NOTE: lossy packets behave like UDP packets meaning they might never reach the other side
 * or might arrive more than once (if someone is messing with the connection) or might arrive
 * in the wrong order.
 *
 * Unless latency is an issue, it is recommended that you use lossless packets instead.
 *
 * return -1 on failure.
 * return 0 on success.
 */
int tox_lossy_packet_registerhandler(Tox *tox, int32_t friendnumber, uint8_t byte,
                                     int (*packet_handler_callback)(void *object, const uint8_t *data, uint32_t len), void *object)
{
    Messenger *m = tox;

    if (byte < (PACKET_ID_LOSSY_RANGE_START + 8)) /* First 8 reserved for A/V*/
        return -1;

    return custom_lossy_packet_registerhandler(m, friendnumber, byte, packet_handler_callback, object);
}

/* Function to send custom lossy packets.
 * First byte of data must be in the range: 200-254.
 *
 * return -1 on failure.
 * return 0 on success.
 */
int tox_send_lossy_packet(const Tox *tox, int32_t friendnumber, const uint8_t *data, uint32_t length)
{
    const Messenger *m = tox;

    if (length == 0)
        return -1;

    if (data[0] < (PACKET_ID_LOSSY_RANGE_START + 8)) /* First 8 reserved for A/V*/
        return -1;

    return send_custom_lossy_packet(m, friendnumber, data, length);
}

/* Set handlers for custom lossless packets.
 * Set the function to be called when friend sends us a lossless packet starting with byte.
 * byte must be in the 160-191 range.
 *
 * return -1 on failure.
 * return 0 on success.
 */
int tox_lossless_packet_registerhandler(Tox *tox, int32_t friendnumber, uint8_t byte,
                                        int (*packet_handler_callback)(void *object, const uint8_t *data, uint32_t len), void *object)
{
    Messenger *m = tox;

    return custom_lossless_packet_registerhandler(m, friendnumber, byte, packet_handler_callback, object);
}

/* Function to send custom lossless packets.
 * First byte of data must be in the range: 160-191.
 *
 * return -1 on failure.
 * return 0 on success.
 */
int tox_send_lossless_packet(const Tox *tox, int32_t friendnumber, const uint8_t *data, uint32_t length)
{
    const Messenger *m = tox;

    return send_custom_lossless_packet(m, friendnumber, data, length);
}

/**********GROUP CHAT FUNCTIONS: WARNING Group chats will be rewritten so this might change ************/

/* Set the callback for group invites.
 *
 *  Function(Tox *tox, int32_t friendnumber, uint8_t *group_public_key, void *userdata)
 */
void tox_callback_group_invite(Tox *tox, void (*function)(Messenger *tox, int32_t, const 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, int friendgroupnumber, uint8_t * message, uint16_t length, void *userdata)
 */
void tox_callback_group_message(Tox *tox, void (*function)(Messenger *tox, int, int, const uint8_t *, uint16_t, void *),
                                void *userdata)
{
    Messenger *m = tox;
    m_callback_group_message(m, function, userdata);
}

/* Set the callback for group actions.
 *
 *  Function(Tox *tox, int groupnumber, int friendgroupnumber, uint8_t * action, uint16_t length, void *userdata)
 */
void tox_callback_group_action(Tox *tox, void (*function)(Messenger *tox, int, int, const uint8_t *, uint16_t, void *),
                               void *userdata)
{
    Messenger *m = tox;
    m_callback_group_action(m, function, userdata);
}

/* Set callback function for peer name list changes.
 *
 * It gets called every time the name list changes(new peer/name, deleted peer)
 *  Function(Tox *tox, int groupnumber, void *userdata)
 */
void tox_callback_group_namelist_change(Tox *tox, void (*function)(Tox *tox, int, int, uint8_t, void *), void *userdata)
{
    Messenger *m = tox;
    m_callback_group_namelistchange(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(Tox *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(Tox *tox, int groupnumber)
{
    Messenger *m = tox;
    return del_groupchat(m, groupnumber);
}

/* Copy the name of peernumber who is in groupnumber to name.
 * name must be at least MAX_NICK_BYTES long.
 *
 * return length of name if success
 * return -1 if failure
 */
int tox_group_peername(const Tox *tox, int groupnumber, int peernumber, uint8_t *name)
{
    const Messenger *m = tox;
    return m_group_peername(m, groupnumber, peernumber, name);
}
/* invite friendnumber to groupnumber
 * return 0 on success
 * return -1 on failure
 */
int tox_invite_friend(Tox *tox, int32_t 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(Tox *tox, int32_t friendnumber, const 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(Tox *tox, int groupnumber, const uint8_t *message, uint32_t length)
{
    Messenger *m = tox;
    return group_message_send(m, groupnumber, message, length);
}

/* send a group action
 * return 0 on success
 * return -1 on failure
 */
int tox_group_action_send(Tox *tox, int groupnumber, const uint8_t *action, uint32_t length)
{
    Messenger *m = tox;
    return group_action_send(m, groupnumber, action, length);
}

/* Return the number of peers in the group chat on success.
 * return -1 on failure
 */
int tox_group_number_peers(const Tox *tox, int groupnumber)
{
    const Messenger *m = tox;
    return group_number_peers(m, groupnumber);
}

/* List all the peers in the group chat.
 *
 * Copies the names of the peers to the name[length][MAX_NICK_BYTES] array.
 *
 * Copies the lengths of the names to lengths[length]
 *
 * returns the number of peers on success.
 *
 * return -1 on failure.
 */
int tox_group_get_names(const Tox *tox, int groupnumber, uint8_t names[][TOX_MAX_NAME_LENGTH], uint16_t lengths[],
                        uint16_t length)
{
    const Messenger *m = tox;
    return group_names(m, groupnumber, names, lengths, length);
}

/* Return the number of chats in the instance m.
 * You should use this to determine how much memory to allocate
 * for copy_chatlist. */
uint32_t tox_count_chatlist(const Tox *tox)
{
    const Messenger *m = tox;
    return count_chatlist(m);
}

/* Copy a list of valid chat IDs into the array out_list.
 * If out_list is NULL, returns 0.
 * Otherwise, returns the number of elements copied.
 * If the array was too small, the contents
 * of out_list will be truncated to list_size. */
uint32_t tox_get_chatlist(const Tox *tox, int *out_list, uint32_t list_size)
{
    const Messenger *m = tox;
    return copy_chatlist(m, out_list, list_size);
}


/****************FILE SENDING FUNCTIONS*****************/


/* Set the callback for file send requests.
 *
 *  Function(Tox *tox, int32_t friendnumber, uint8_t filenumber, uint64_t filesize, uint8_t *filename, uint16_t filename_length, void *userdata)
 */
void tox_callback_file_send_request(Tox *tox, void (*function)(Messenger *tox, int32_t, uint8_t, uint64_t,
                                    const uint8_t *, uint16_t, void *), void *userdata)
{
    Messenger *m = tox;
    callback_file_sendrequest(m, function, userdata);
}
/* Set the callback for file control requests.
 *
 *  Function(Tox *tox, int32_t friendnumber, uint8_t send_receive, uint8_t filenumber, uint8_t control_type, uint8_t *data, uint16_t length, void *userdata)
 *
 */
void tox_callback_file_control(Tox *tox, void (*function)(Messenger *tox, int32_t, uint8_t, uint8_t, uint8_t,
                               const uint8_t *, uint16_t, void *), void *userdata)
{
    Messenger *m = tox;
    callback_file_control(m, function, userdata);
}
/* Set the callback for file data.
 *
 *  Function(Tox *tox, int32_t friendnumber, uint8_t filenumber, uint8_t *data, uint16_t length, void *userdata)
 *
 */
void tox_callback_file_data(Tox *tox, void (*function)(Messenger *tox, int32_t, uint8_t, const uint8_t *,
                            uint16_t length, void *), void *userdata)

{
    Messenger *m = tox;
    callback_file_data(m, function, userdata);
}
/* Send a file send request.
 * Maximum filename length is 255 bytes.
 *  return file number on success
 *  return -1 on failure
 */
int tox_new_file_sender(Tox *tox, int32_t friendnumber, uint64_t filesize, const uint8_t *filename,
                        uint16_t filename_length)
{
    Messenger *m = tox;
    return new_filesender(m, friendnumber, filesize, filename, filename_length);
}
/* Send a file control request.
 * send_receive is 0 if we want the control packet to target a sending file, 1 if it targets a receiving file.
 *
 *  return 0 on success
 *  return -1 on failure
 */
int tox_file_send_control(Tox *tox, int32_t friendnumber, uint8_t send_receive, uint8_t filenumber, uint8_t message_id,
                          const uint8_t *data, uint16_t length)
{
    Messenger *m = tox;
    return file_control(m, friendnumber, send_receive, filenumber, message_id, data, length);
}
/* Send file data.
 *
 *  return 0 on success
 *  return -1 on failure
 */
int tox_file_send_data(Tox *tox, int32_t friendnumber, uint8_t filenumber, const uint8_t *data, uint16_t length)
{
    Messenger *m = tox;
    return file_data(m, friendnumber, filenumber, data, length);
}

/* Returns the recommended/maximum size of the filedata you send with tox_file_send_data()
 *
 *  return size on success
 *  return -1 on failure (currently will never return -1)
 */
int tox_file_data_size(const Tox *tox, int32_t friendnumber)
{
    return MAX_CRYPTO_DATA_SIZE - 2;
}

/* Give the number of bytes left to be sent/received.
 *
 *  send_receive is 0 if we want the sending files, 1 if we want the receiving.
 *
 *  return number of bytes remaining to be sent/received on success
 *  return 0 on failure
 */
uint64_t tox_file_data_remaining(const Tox *tox, int32_t friendnumber, uint8_t filenumber, uint8_t send_receive)
{
    const Messenger *m = tox;
    return file_dataremaining(m, friendnumber, filenumber, send_receive);
}

/***************END OF FILE SENDING FUNCTIONS******************/

/* Like tox_bootstrap_from_address but for TCP relays only.
 *
 * return 0 on failure.
 * return 1 on success.
 */
int tox_add_tcp_relay(Tox *tox, const char *address, uint16_t port, const uint8_t *public_key)
{
    Messenger *m = tox;
    IP_Port ip_port, ip_port_v4;
    if (!addr_parse_ip(address, &ip_port.ip)) {
        if (m->options.udp_disabled) /* Disable DNS when udp is disabled. */
            return 0;

        IP *ip_extra = NULL;
        ip_init(&ip_port.ip, m->options.ipv6enabled);

        if (m->options.ipv6enabled) {
            /* setup for getting BOTH: an IPv6 AND an IPv4 address */
            ip_port.ip.family = AF_UNSPEC;
            ip_reset(&ip_port_v4.ip);
            ip_extra = &ip_port_v4.ip;
        }

        if (!addr_resolve(address, &ip_port.ip, ip_extra))
            return 0;
    }

    ip_port.port = htons(port);
    add_tcp_relay(m->net_crypto, ip_port, public_key);
    onion_add_path_node(m->onion_c, ip_port, public_key); //TODO: move this
    return 1;
}

int tox_bootstrap_from_address(Tox *tox, const char *address, uint16_t port, const uint8_t *public_key)
{
    Messenger *m = tox;
    int ret = tox_add_tcp_relay(tox, address, port, public_key);
    if (m->options.udp_disabled) {
        return ret;
    } else { /* DHT only works on UDP. */
        return DHT_bootstrap_from_address(m->dht, address, m->options.ipv6enabled, htons(port), public_key);
    }
}

/*  return 0 if we are not connected to the DHT.
 *  return 1 if we are.
 */
int tox_isconnected(const Tox *tox)
{
    const Messenger *m = tox;
    return onion_isconnected(m->onion_c);
}

/* Return the time in milliseconds before tox_do() should be called again
 * for optimal performance.
 *
 * returns time (in ms) before the next tox_do() needs to be run on success.
 */
uint32_t tox_do_interval(Tox *tox)
{
    Messenger *m = tox;
    return messenger_run_interval(m);
}

/* Run this at startup.
 *
 *  return allocated instance of tox on success.
 *  return 0 if there are problems.
 */
Tox *tox_new(Tox_Options *options)
{
    LOGGER_INIT(LOGGER_OUTPUT_FILE, LOGGER_LEVEL);
    Messenger_Options m_options = {0};

    if (options == NULL) {
        m_options.ipv6enabled = TOX_ENABLE_IPV6_DEFAULT;
    } else {
        m_options.ipv6enabled = options->ipv6enabled;
        m_options.udp_disabled = options->udp_disabled;
        m_options.proxy_enabled = options->proxy_enabled;

        if (m_options.proxy_enabled) {
            ip_init(&m_options.proxy_info.ip_port.ip, m_options.ipv6enabled);

            if (m_options.ipv6enabled)
                m_options.proxy_info.ip_port.ip.family = AF_UNSPEC;

            if (!addr_resolve_or_parse_ip(options->proxy_address, &m_options.proxy_info.ip_port.ip, NULL))
                return NULL;

            m_options.proxy_info.ip_port.port = htons(options->proxy_port);
        }
    }

    return new_messenger(&m_options);
}

/* Run this before closing shop.
 * Free all datastructures.
 */
void tox_kill(Tox *tox)
{
    Messenger *m = tox;
    kill_messenger(m);
}

/* The main loop that needs to be run at least 20 times per second. */
void tox_do(Tox *tox)
{
    Messenger *m = tox;
    do_messenger(m);
}

/* SAVING AND LOADING FUNCTIONS: */

/*  return size of the messenger data (for saving). */
uint32_t tox_size(const Tox *tox)
{
    const Messenger *m = tox;
    return messenger_size(m);
}

/* Save the messenger in data (must be allocated memory of size Messenger_size()). */
void tox_save(const Tox *tox, uint8_t *data)
{
    const Messenger *m = tox;
    messenger_save(m, data);
}

/* Load the messenger from data of size length. */
int tox_load(Tox *tox, const uint8_t *data, uint32_t length)
{
    if (memcmp(data, TOX_ENC_SAVE_MAGIC_NUMBER, TOX_ENC_SAVE_MAGIC_LENGTH) == 0)
        return 1;

    Messenger *m = tox;
    return messenger_load(m, data, length);
}