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tomato-testing/toxcore/Messenger.c
Green Sky cae0ab9c5c Squashed 'external/toxcore/c-toxcore/' changes from 03e9fbf3703..55752a2e2ef 
55752a2e2ef fix(toxav): pass video bit rate as kbit Previously we unintentionally made it Mbit.
7e573280a75 docs(toxav): fix docs of toxav.h - fix units to be more readable - use width before height consistently - video -> audio typo
5f88a084e8c fix: friend_connections leak on allocation failure clean up when it only contains connections in the NONE state
6d27a1ae178 fix: wrong comment for closelist
ce4f29e8036 cleanup: Fix all `-Wsign-compare` warnings.
4d4251c397f chore: lower cirrus ci timeout drastically
40676284507 fix: events leak that can occur if allocation fails rare in practice, found by fuzzing
9610ac31c5f fix: Return an error instead of crashing on nullptr args in NGC.
a57c2c8f956 refactor: Make ToxAV independent of toxcore internals.
5752fc29f86 refactor: Make tox-bootstrapd use bool instead of int
df675786eb2 chore: Add release-drafter github action.
03fd7a69dcf chore: Use toktok's cmp instead of upstream.
350c0ba1205 cleanup: Sort apk/apt install commands in Dockerfiles.
8c1bda502cb chore(deps): bump golang.org/x/net
ddb9d3210da chore: Upgrade to FreeBSD 14.1 in cirrus build.
e9076f45bd3 chore(cmake): set options changes as cache and with force

git-subtree-dir: external/toxcore/c-toxcore
git-subtree-split: 55752a2e2ef894bfa6d7a2a21a0278e3f2bede7d
2024-11-09 13:44:30 +01:00

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/* SPDX-License-Identifier: GPL-3.0-or-later
* Copyright © 2016-2018 The TokTok team.
* Copyright © 2013 Tox project.
*/
/**
* An implementation of a simple text chat only messenger on the tox network core.
*/
#include "Messenger.h"
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include "DHT.h"
#include "TCP_client.h"
#include "TCP_connection.h"
#include "TCP_server.h"
#include "announce.h"
#include "attributes.h"
#include "bin_pack.h"
#include "bin_unpack.h"
#include "ccompat.h"
#include "crypto_core.h"
#include "forwarding.h"
#include "friend_connection.h"
#include "friend_requests.h"
#include "group_announce.h"
#include "group_chats.h"
#include "group_common.h"
#include "group_onion_announce.h"
#include "logger.h"
#include "mem.h"
#include "mono_time.h"
#include "net_crypto.h"
#include "network.h"
#include "onion.h"
#include "onion_announce.h"
#include "onion_client.h"
#include "state.h"
#include "util.h"
static_assert(MAX_CONCURRENT_FILE_PIPES <= UINT8_MAX + 1,
"uint8_t cannot represent all file transfer numbers");
static const Friend empty_friend = {{0}};
/**
* Determines if the friendnumber passed is valid in the Messenger object.
*
* @param friendnumber The index in the friend list.
*/
bool friend_is_valid(const Messenger *m, int32_t friendnumber)
{
return (uint32_t)friendnumber < m->numfriends && m->friendlist[friendnumber].status != 0;
}
/** @brief Set the size of the friend list to numfriends.
*
* @retval -1 if mem_vrealloc fails.
*/
non_null()
static int realloc_friendlist(Messenger *m, uint32_t num)
{
if (num == 0) {
mem_delete(m->mem, m->friendlist);
m->friendlist = nullptr;
return 0;
}
Friend *newfriendlist = (Friend *)mem_vrealloc(m->mem, m->friendlist, num, sizeof(Friend));
if (newfriendlist == nullptr) {
return -1;
}
m->friendlist = newfriendlist;
return 0;
}
/** @return the friend number associated to that public key.
* @retval -1 if no such friend.
*/
int32_t getfriend_id(const Messenger *m, const uint8_t *real_pk)
{
for (uint32_t i = 0; i < m->numfriends; ++i) {
if (m->friendlist[i].status > 0 && pk_equal(real_pk, m->friendlist[i].real_pk)) {
return i;
}
}
return -1;
}
/** @brief Copies the public key associated to that friend id into real_pk buffer.
*
* Make sure that real_pk is of size CRYPTO_PUBLIC_KEY_SIZE.
*
* @retval 0 if success.
* @retval -1 if failure.
*/
int get_real_pk(const Messenger *m, int32_t friendnumber, uint8_t *real_pk)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
memcpy(real_pk, m->friendlist[friendnumber].real_pk, CRYPTO_PUBLIC_KEY_SIZE);
return 0;
}
/** @return friend connection id on success.
* @retval -1 if failure.
*/
int getfriendcon_id(const Messenger *m, int32_t friendnumber)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
return m->friendlist[friendnumber].friendcon_id;
}
/**
* Format: `[real_pk (32 bytes)][nospam number (4 bytes)][checksum (2 bytes)]`
*
* @param[out] address FRIEND_ADDRESS_SIZE byte address to give to others.
*/
void getaddress(const Messenger *m, uint8_t *address)
{
pk_copy(address, nc_get_self_public_key(m->net_crypto));
uint32_t nospam = get_nospam(m->fr);
memcpy(address + CRYPTO_PUBLIC_KEY_SIZE, &nospam, sizeof(nospam));
uint16_t checksum = data_checksum(address, FRIEND_ADDRESS_SIZE - sizeof(checksum));
memcpy(address + CRYPTO_PUBLIC_KEY_SIZE + sizeof(nospam), &checksum, sizeof(checksum));
}
non_null()
static bool send_online_packet(Messenger *m, int friendcon_id)
{
const uint8_t packet[1] = {PACKET_ID_ONLINE};
return write_cryptpacket(m->net_crypto, friend_connection_crypt_connection_id(m->fr_c, friendcon_id), packet,
sizeof(packet), false) != -1;
}
non_null()
static bool send_offline_packet(Messenger *m, int friendcon_id)
{
const uint8_t packet[1] = {PACKET_ID_OFFLINE};
return write_cryptpacket(m->net_crypto, friend_connection_crypt_connection_id(m->fr_c, friendcon_id), packet,
sizeof(packet), false) != -1;
}
non_null(1) nullable(4)
static int m_handle_status(void *object, int friendcon_id, bool status, void *userdata);
non_null(1, 3) nullable(5)
static int m_handle_packet(void *object, int friendcon_id, const uint8_t *data, uint16_t length, void *userdata);
non_null(1, 3) nullable(5)
static int m_handle_lossy_packet(void *object, int friendcon_id, const uint8_t *data, uint16_t length,
void *userdata);
non_null()
static int32_t init_new_friend(Messenger *m, const uint8_t *real_pk, uint8_t status)
{
if (m->numfriends == UINT32_MAX) {
LOGGER_ERROR(m->log, "Friend list full: we have more than 4 billion friends");
/* This is technically incorrect, but close enough. */
return FAERR_NOMEM;
}
/* Resize the friend list if necessary. */
if (realloc_friendlist(m, m->numfriends + 1) != 0) {
return FAERR_NOMEM;
}
m->friendlist[m->numfriends] = empty_friend;
const int friendcon_id = new_friend_connection(m->fr_c, real_pk);
if (friendcon_id == -1) {
return FAERR_NOMEM;
}
for (uint32_t i = 0; i <= m->numfriends; ++i) {
if (m->friendlist[i].status == NOFRIEND) {
m->friendlist[i].status = status;
m->friendlist[i].friendcon_id = friendcon_id;
m->friendlist[i].friendrequest_lastsent = 0;
pk_copy(m->friendlist[i].real_pk, real_pk);
m->friendlist[i].statusmessage_length = 0;
m->friendlist[i].userstatus = USERSTATUS_NONE;
m->friendlist[i].is_typing = false;
m->friendlist[i].message_id = 0;
friend_connection_callbacks(m->fr_c, friendcon_id, MESSENGER_CALLBACK_INDEX, &m_handle_status, &m_handle_packet,
&m_handle_lossy_packet, m, i);
if (m->numfriends == i) {
++m->numfriends;
}
if (friend_con_connected(m->fr_c, friendcon_id) == FRIENDCONN_STATUS_CONNECTED) {
send_online_packet(m, friendcon_id);
}
return i;
}
}
return FAERR_NOMEM;
}
non_null()
static int32_t m_add_friend_contact_norequest(Messenger *m, const uint8_t *real_pk)
{
if (getfriend_id(m, real_pk) != -1) {
return FAERR_ALREADYSENT;
}
if (pk_equal(real_pk, nc_get_self_public_key(m->net_crypto))) {
return FAERR_OWNKEY;
}
return init_new_friend(m, real_pk, FRIEND_CONFIRMED);
}
/**
* Add a friend.
*
* Set the data that will be sent along with friend request.
*
* @param 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(irungentoo): add checksum.
* @param data is the data.
* @param length is the length.
*
* @return the friend number if success.
* @retval FA_TOOLONG if message length is too long.
* @retval FAERR_NOMESSAGE if no message (message length must be >= 1 byte).
* @retval FAERR_OWNKEY if user's own key.
* @retval FAERR_ALREADYSENT if friend request already sent or already a friend.
* @retval FAERR_BADCHECKSUM if bad checksum in address.
* @retval FAERR_SETNEWNOSPAM if the friend was already there but the nospam was different.
* (the nospam for that friend was set to the new one).
* @retval FAERR_NOMEM if increasing the friend list size fails.
*/
int32_t m_addfriend(Messenger *m, const uint8_t *address, const uint8_t *data, uint16_t length)
{
if (length > MAX_FRIEND_REQUEST_DATA_SIZE) {
return FAERR_TOOLONG;
}
uint8_t real_pk[CRYPTO_PUBLIC_KEY_SIZE];
pk_copy(real_pk, address);
if (!public_key_valid(real_pk)) {
return FAERR_BADCHECKSUM;
}
uint16_t check;
const uint16_t checksum = data_checksum(address, FRIEND_ADDRESS_SIZE - sizeof(checksum));
memcpy(&check, address + CRYPTO_PUBLIC_KEY_SIZE + sizeof(uint32_t), sizeof(check));
if (check != checksum) {
return FAERR_BADCHECKSUM;
}
if (length < 1) {
return FAERR_NOMESSAGE;
}
if (pk_equal(real_pk, nc_get_self_public_key(m->net_crypto))) {
return FAERR_OWNKEY;
}
const int32_t friend_id = getfriend_id(m, real_pk);
if (friend_id != -1) {
if (m->friendlist[friend_id].status >= FRIEND_CONFIRMED) {
return FAERR_ALREADYSENT;
}
uint32_t nospam;
memcpy(&nospam, address + CRYPTO_PUBLIC_KEY_SIZE, sizeof(nospam));
if (m->friendlist[friend_id].friendrequest_nospam == nospam) {
return FAERR_ALREADYSENT;
}
m->friendlist[friend_id].friendrequest_nospam = nospam;
return FAERR_SETNEWNOSPAM;
}
const int32_t ret = init_new_friend(m, real_pk, FRIEND_ADDED);
if (ret < 0) {
return ret;
}
m->friendlist[ret].friendrequest_timeout = FRIENDREQUEST_TIMEOUT;
memcpy(m->friendlist[ret].info, data, length);
m->friendlist[ret].info_size = length;
memcpy(&m->friendlist[ret].friendrequest_nospam, address + CRYPTO_PUBLIC_KEY_SIZE, sizeof(uint32_t));
return ret;
}
int32_t m_addfriend_norequest(Messenger *m, const uint8_t *real_pk)
{
if (!public_key_valid(real_pk)) {
return FAERR_BADCHECKSUM;
}
if (pk_equal(real_pk, nc_get_self_public_key(m->net_crypto))) {
return FAERR_OWNKEY;
}
return m_add_friend_contact_norequest(m, real_pk);
}
non_null()
static int clear_receipts(Messenger *m, int32_t friendnumber)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
struct Receipts *receipts = m->friendlist[friendnumber].receipts_start;
while (receipts != nullptr) {
struct Receipts *temp_r = receipts->next;
mem_delete(m->mem, receipts);
receipts = temp_r;
}
m->friendlist[friendnumber].receipts_start = nullptr;
m->friendlist[friendnumber].receipts_end = nullptr;
return 0;
}
non_null()
static int add_receipt(Messenger *m, int32_t friendnumber, uint32_t packet_num, uint32_t msg_id)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
struct Receipts *new_receipts = (struct Receipts *)mem_alloc(m->mem, sizeof(struct Receipts));
if (new_receipts == nullptr) {
return -1;
}
new_receipts->packet_num = packet_num;
new_receipts->msg_id = msg_id;
if (m->friendlist[friendnumber].receipts_start == nullptr) {
m->friendlist[friendnumber].receipts_start = new_receipts;
} else {
m->friendlist[friendnumber].receipts_end->next = new_receipts;
}
m->friendlist[friendnumber].receipts_end = new_receipts;
new_receipts->next = nullptr;
return 0;
}
/**
* return -1 on failure.
* return 0 if packet was received.
*/
non_null()
static int friend_received_packet(const Messenger *m, int32_t friendnumber, uint32_t number)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
return cryptpacket_received(m->net_crypto, friend_connection_crypt_connection_id(m->fr_c,
m->friendlist[friendnumber].friendcon_id), number);
}
bool m_create_group_connection(Messenger *m, GC_Chat *chat)
{
random_bytes(m->rng, chat->m_group_public_key, CRYPTO_PUBLIC_KEY_SIZE);
const int friendcon_id = new_friend_connection(m->fr_c, chat->m_group_public_key);
if (friendcon_id == -1) {
return false;
}
const Friend_Conn *connection = get_conn(m->fr_c, friendcon_id);
if (connection == nullptr) {
return false;
}
chat->friend_connection_id = friendcon_id;
if (friend_con_connected(m->fr_c, friendcon_id) == FRIENDCONN_STATUS_CONNECTED) {
send_online_packet(m, friendcon_id);
}
const int onion_friend_number = friend_conn_get_onion_friendnum(connection);
Onion_Friend *onion_friend = onion_get_friend(m->onion_c, (uint16_t)onion_friend_number);
onion_friend_set_gc_public_key(onion_friend, get_chat_id(&chat->chat_public_key));
onion_friend_set_gc_data(onion_friend, nullptr, 0);
return true;
}
/**
* Kills the friend connection for a groupchat.
*/
void m_kill_group_connection(Messenger *m, const GC_Chat *chat)
{
remove_request_received(m->fr, chat->m_group_public_key);
friend_connection_callbacks(m->fr_c, chat->friend_connection_id, MESSENGER_CALLBACK_INDEX, nullptr,
nullptr, nullptr, nullptr, 0);
if (friend_con_connected(m->fr_c, chat->friend_connection_id) == FRIENDCONN_STATUS_CONNECTED) {
send_offline_packet(m, chat->friend_connection_id);
}
kill_friend_connection(m->fr_c, chat->friend_connection_id);
}
non_null(1) nullable(3)
static int do_receipts(Messenger *m, int32_t friendnumber, void *userdata)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
struct Receipts *receipts = m->friendlist[friendnumber].receipts_start;
while (receipts != nullptr) {
if (friend_received_packet(m, friendnumber, receipts->packet_num) == -1) {
break;
}
if (m->read_receipt != nullptr) {
m->read_receipt(m, friendnumber, receipts->msg_id, userdata);
}
struct Receipts *r_next = receipts->next;
mem_delete(m->mem, receipts);
m->friendlist[friendnumber].receipts_start = r_next;
receipts = r_next;
}
if (m->friendlist[friendnumber].receipts_start == nullptr) {
m->friendlist[friendnumber].receipts_end = nullptr;
}
return 0;
}
/** @brief Remove a friend.
*
* @retval 0 if success.
* @retval -1 if failure.
*/
int m_delfriend(Messenger *m, int32_t friendnumber)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
clear_receipts(m, friendnumber);
remove_request_received(m->fr, m->friendlist[friendnumber].real_pk);
friend_connection_callbacks(m->fr_c, m->friendlist[friendnumber].friendcon_id, MESSENGER_CALLBACK_INDEX, nullptr,
nullptr, nullptr, nullptr, 0);
if (friend_con_connected(m->fr_c, m->friendlist[friendnumber].friendcon_id) == FRIENDCONN_STATUS_CONNECTED) {
send_offline_packet(m, m->friendlist[friendnumber].friendcon_id);
}
kill_friend_connection(m->fr_c, m->friendlist[friendnumber].friendcon_id);
m->friendlist[friendnumber] = empty_friend;
uint32_t i;
for (i = m->numfriends; i != 0; --i) {
if (m->friendlist[i - 1].status != NOFRIEND) {
break;
}
}
m->numfriends = i;
if (realloc_friendlist(m, m->numfriends) != 0) {
return FAERR_NOMEM;
}
return 0;
}
int m_get_friend_connectionstatus(const Messenger *m, int32_t friendnumber)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
if (m->friendlist[friendnumber].status != FRIEND_ONLINE) {
return CONNECTION_NONE;
}
bool direct_connected = false;
uint32_t num_online_relays = 0;
const int crypt_conn_id = friend_connection_crypt_connection_id(m->fr_c, m->friendlist[friendnumber].friendcon_id);
if (!crypto_connection_status(m->net_crypto, crypt_conn_id, &direct_connected, &num_online_relays)) {
return CONNECTION_NONE;
}
if (direct_connected) {
return CONNECTION_UDP;
}
if (num_online_relays != 0) {
return CONNECTION_TCP;
}
/* if we have a valid friend connection but do not have an established connection
* we leave the connection status unchanged until the friend connection is either
* established or dropped.
*/
return m->friendlist[friendnumber].last_connection_udp_tcp;
}
/**
* Checks if there exists a friend with given friendnumber.
*
* @param friendnumber The index in the friend list.
*
* @retval true if friend exists.
* @retval false if friend doesn't exist.
*/
bool m_friend_exists(const Messenger *m, int32_t friendnumber)
{
return (unsigned int)friendnumber < m->numfriends && m->friendlist[friendnumber].status != 0;
}
/** @brief Send a message of type to an online friend.
*
* @retval -1 if friend not valid.
* @retval -2 if too large.
* @retval -3 if friend not online.
* @retval -4 if send failed (because queue is full).
* @retval -5 if bad type.
* @retval 0 if success.
*
* The value in message_id will be passed to your read_receipt callback when the other receives the message.
*/
int m_send_message_generic(Messenger *m, int32_t friendnumber, uint8_t type, const uint8_t *message, uint32_t length,
uint32_t *message_id)
{
if (type > MESSAGE_ACTION) {
LOGGER_WARNING(m->log, "message type %d is invalid", type);
return -5;
}
if (!m_friend_exists(m, friendnumber)) {
LOGGER_WARNING(m->log, "friend number %d is invalid", friendnumber);
return -1;
}
if (length >= MAX_CRYPTO_DATA_SIZE) {
LOGGER_WARNING(m->log, "message length %u is too large", length);
return -2;
}
if (m->friendlist[friendnumber].status != FRIEND_ONLINE) {
LOGGER_WARNING(m->log, "friend %d is not online", friendnumber);
return -3;
}
VLA(uint8_t, packet, length + 1);
packet[0] = PACKET_ID_MESSAGE + type;
assert(message != nullptr);
memcpy(packet + 1, message, length);
const int64_t packet_num = write_cryptpacket(m->net_crypto, friend_connection_crypt_connection_id(m->fr_c,
m->friendlist[friendnumber].friendcon_id), packet, length + 1, false);
if (packet_num == -1) {
return -4;
}
const uint32_t msg_id = ++m->friendlist[friendnumber].message_id;
add_receipt(m, friendnumber, packet_num, msg_id);
if (message_id != nullptr) {
*message_id = msg_id;
}
return 0;
}
non_null()
static bool write_cryptpacket_id(const Messenger *m, int32_t friendnumber, uint8_t packet_id, const uint8_t *data,
uint32_t length, bool congestion_control)
{
if (!m_friend_exists(m, friendnumber)) {
return false;
}
if (length >= MAX_CRYPTO_DATA_SIZE || m->friendlist[friendnumber].status != FRIEND_ONLINE) {
return false;
}
VLA(uint8_t, packet, length + 1);
packet[0] = packet_id;
assert(data != nullptr);
memcpy(packet + 1, data, length);
return write_cryptpacket(m->net_crypto, friend_connection_crypt_connection_id(m->fr_c,
m->friendlist[friendnumber].friendcon_id), packet, length + 1, congestion_control) != -1;
}
/** @brief Send a name packet to friendnumber.
* length is the length with the NULL terminator.
*/
non_null()
static bool m_sendname(const Messenger *m, int32_t friendnumber, const uint8_t *name, uint16_t length)
{
if (length > MAX_NAME_LENGTH) {
return false;
}
return write_cryptpacket_id(m, friendnumber, PACKET_ID_NICKNAME, name, length, false);
}
/** @brief Set the name and name_length of a friend.
*
* 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.
*
* @retval 0 if success.
* @retval -1 if failure.
*/
int setfriendname(Messenger *m, int32_t friendnumber, const uint8_t *name, uint16_t length)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
if (length > MAX_NAME_LENGTH || length == 0) {
return -1;
}
m->friendlist[friendnumber].name_length = length;
memcpy(m->friendlist[friendnumber].name, name, length);
return 0;
}
/** @brief 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.
*
* @retval 0 if success.
* @retval -1 if failure.
*/
int setname(Messenger *m, const uint8_t *name, uint16_t length)
{
if (length > MAX_NAME_LENGTH) {
return -1;
}
if (m->name_length == length && (length == 0 || memcmp(name, m->name, length) == 0)) {
return 0;
}
if (length > 0) {
memcpy(m->name, name, length);
}
m->name_length = length;
for (uint32_t i = 0; i < m->numfriends; ++i) {
m->friendlist[i].name_sent = false;
}
return 0;
}
/**
* @brief Get your nickname.
*
* m - The messenger context to use.
* name needs to be a valid memory location with a size of at least MAX_NAME_LENGTH bytes.
*
* @return length of the name.
* @retval 0 on error.
*/
uint16_t getself_name(const Messenger *m, uint8_t *name)
{
if (name == nullptr) {
return 0;
}
memcpy(name, m->name, m->name_length);
return m->name_length;
}
/** @brief 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 if success.
* @retval -1 if failure.
*/
int getname(const Messenger *m, int32_t friendnumber, uint8_t *name)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
memcpy(name, m->friendlist[friendnumber].name, m->friendlist[friendnumber].name_length);
return m->friendlist[friendnumber].name_length;
}
int m_get_name_size(const Messenger *m, int32_t friendnumber)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
return m->friendlist[friendnumber].name_length;
}
int m_get_self_name_size(const Messenger *m)
{
return m->name_length;
}
int m_set_statusmessage(Messenger *m, const uint8_t *status, uint16_t length)
{
if (length > MAX_STATUSMESSAGE_LENGTH) {
return -1;
}
if (m->statusmessage_length == length && (length == 0 || memcmp(m->statusmessage, status, length) == 0)) {
return 0;
}
if (length > 0) {
memcpy(m->statusmessage, status, length);
}
m->statusmessage_length = length;
for (uint32_t i = 0; i < m->numfriends; ++i) {
m->friendlist[i].statusmessage_sent = false;
}
return 0;
}
non_null()
static bool userstatus_from_int(uint8_t status, Userstatus *out_enum)
{
switch (status) {
case USERSTATUS_NONE: {
*out_enum = USERSTATUS_NONE;
return true;
}
case USERSTATUS_AWAY: {
*out_enum = USERSTATUS_AWAY;
return true;
}
case USERSTATUS_BUSY: {
*out_enum = USERSTATUS_BUSY;
return true;
}
case USERSTATUS_INVALID: {
*out_enum = USERSTATUS_INVALID;
return true;
}
default: {
*out_enum = USERSTATUS_INVALID;
return false;
}
}
}
int m_set_userstatus(Messenger *m, uint8_t status)
{
if (status >= USERSTATUS_INVALID) {
return -1;
}
if (m->userstatus == status) {
return 0;
}
userstatus_from_int(status, &m->userstatus);
for (uint32_t i = 0; i < m->numfriends; ++i) {
m->friendlist[i].userstatus_sent = false;
}
return 0;
}
/**
* Guaranteed to be at most MAX_STATUSMESSAGE_LENGTH.
*
* @return the length of friendnumber's status message, including null on success.
* @retval -1 on failure.
*/
int m_get_statusmessage_size(const Messenger *m, int32_t friendnumber)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
return m->friendlist[friendnumber].statusmessage_length;
}
/** @brief 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.
*
* @return the length of the copied data on success
* @retval -1 on failure.
*/
int m_copy_statusmessage(const Messenger *m, int32_t friendnumber, uint8_t *buf, uint32_t maxlen)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
// TODO(iphydf): This should be uint16_t and min_u16. If maxlen exceeds
// uint16_t's range, it won't affect the result.
const uint32_t msglen = min_u32(maxlen, m->friendlist[friendnumber].statusmessage_length);
memcpy(buf, m->friendlist[friendnumber].statusmessage, msglen);
memzero(buf + msglen, maxlen - msglen);
return msglen;
}
/** @return the size of friendnumber's user status.
* Guaranteed to be at most MAX_STATUSMESSAGE_LENGTH.
*/
int m_get_self_statusmessage_size(const Messenger *m)
{
return m->statusmessage_length;
}
int m_copy_self_statusmessage(const Messenger *m, uint8_t *buf)
{
memcpy(buf, m->statusmessage, m->statusmessage_length);
return m->statusmessage_length;
}
uint8_t m_get_userstatus(const Messenger *m, int32_t friendnumber)
{
if (!m_friend_exists(m, friendnumber)) {
return USERSTATUS_INVALID;
}
uint8_t status = m->friendlist[friendnumber].userstatus;
if (status >= USERSTATUS_INVALID) {
status = USERSTATUS_NONE;
}
return status;
}
uint8_t m_get_self_userstatus(const Messenger *m)
{
return m->userstatus;
}
uint64_t m_get_last_online(const Messenger *m, int32_t friendnumber)
{
if (!m_friend_exists(m, friendnumber)) {
return UINT64_MAX;
}
return m->friendlist[friendnumber].last_seen_time;
}
int m_set_usertyping(Messenger *m, int32_t friendnumber, bool is_typing)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
if (m->friendlist[friendnumber].user_istyping == is_typing) {
return 0;
}
m->friendlist[friendnumber].user_istyping = is_typing;
m->friendlist[friendnumber].user_istyping_sent = false;
return 0;
}
int m_get_istyping(const Messenger *m, int32_t friendnumber)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
return m->friendlist[friendnumber].is_typing ? 1 : 0;
}
non_null()
static bool send_statusmessage(const Messenger *m, int32_t friendnumber, const uint8_t *status, uint16_t length)
{
return write_cryptpacket_id(m, friendnumber, PACKET_ID_STATUSMESSAGE, status, length, false);
}
non_null()
static bool send_userstatus(const Messenger *m, int32_t friendnumber, uint8_t status)
{
return write_cryptpacket_id(m, friendnumber, PACKET_ID_USERSTATUS, &status, sizeof(status), false);
}
non_null()
static bool send_user_istyping(const Messenger *m, int32_t friendnumber, bool is_typing)
{
const uint8_t typing = is_typing ? 1 : 0;
return write_cryptpacket_id(m, friendnumber, PACKET_ID_TYPING, &typing, sizeof(typing), false);
}
non_null()
static int set_friend_statusmessage(const Messenger *m, int32_t friendnumber, const uint8_t *status, uint16_t length)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
if (length > MAX_STATUSMESSAGE_LENGTH) {
return -1;
}
if (length > 0) {
memcpy(m->friendlist[friendnumber].statusmessage, status, length);
}
m->friendlist[friendnumber].statusmessage_length = length;
return 0;
}
non_null()
static void set_friend_userstatus(const Messenger *m, int32_t friendnumber, uint8_t status)
{
userstatus_from_int(status, &m->friendlist[friendnumber].userstatus);
}
non_null()
static void set_friend_typing(const Messenger *m, int32_t friendnumber, bool is_typing)
{
m->friendlist[friendnumber].is_typing = is_typing;
}
/** Set the function that will be executed when a friend request is received. */
void m_callback_friendrequest(Messenger *m, m_friend_request_cb *function)
{
m->friend_request = function;
}
/** Set the function that will be executed when a message from a friend is received. */
void m_callback_friendmessage(Messenger *m, m_friend_message_cb *function)
{
m->friend_message = function;
}
void m_callback_namechange(Messenger *m, m_friend_name_cb *function)
{
m->friend_namechange = function;
}
void m_callback_statusmessage(Messenger *m, m_friend_status_message_cb *function)
{
m->friend_statusmessagechange = function;
}
void m_callback_userstatus(Messenger *m, m_friend_status_cb *function)
{
m->friend_userstatuschange = function;
}
void m_callback_typingchange(Messenger *m, m_friend_typing_cb *function)
{
m->friend_typingchange = function;
}
void m_callback_read_receipt(Messenger *m, m_friend_read_receipt_cb *function)
{
m->read_receipt = function;
}
void m_callback_connectionstatus(Messenger *m, m_friend_connection_status_cb *function)
{
m->friend_connectionstatuschange = function;
}
void m_callback_core_connection(Messenger *m, m_self_connection_status_cb *function)
{
m->core_connection_change = function;
}
non_null(1) nullable(3)
static void check_friend_tcp_udp(Messenger *m, int32_t friendnumber, void *userdata)
{
const int last_connection_udp_tcp = m->friendlist[friendnumber].last_connection_udp_tcp;
const int ret = m_get_friend_connectionstatus(m, friendnumber);
if (ret == -1) {
return;
}
if (last_connection_udp_tcp != ret) {
if (m->friend_connectionstatuschange != nullptr) {
m->friend_connectionstatuschange(m, friendnumber, ret, userdata);
}
}
m->friendlist[friendnumber].last_connection_udp_tcp = (Connection_Status)ret;
}
non_null()
static void break_files(const Messenger *m, int32_t friendnumber);
non_null(1) nullable(4)
static void check_friend_connectionstatus(Messenger *m, int32_t friendnumber, uint8_t status, void *userdata)
{
if (status == NOFRIEND) {
return;
}
const bool was_online = m->friendlist[friendnumber].status == FRIEND_ONLINE;
const bool is_online = status == FRIEND_ONLINE;
if (is_online != was_online) {
if (was_online) {
break_files(m, friendnumber);
clear_receipts(m, friendnumber);
} else {
m->friendlist[friendnumber].name_sent = false;
m->friendlist[friendnumber].userstatus_sent = false;
m->friendlist[friendnumber].statusmessage_sent = false;
m->friendlist[friendnumber].user_istyping_sent = false;
}
m->friendlist[friendnumber].status = status;
check_friend_tcp_udp(m, friendnumber, userdata);
}
}
non_null(1) nullable(4)
static void set_friend_status(Messenger *m, int32_t friendnumber, uint8_t status, void *userdata)
{
check_friend_connectionstatus(m, friendnumber, status, userdata);
m->friendlist[friendnumber].status = status;
}
/*** CONFERENCES */
/** @brief Set the callback for conference invites. */
void m_callback_conference_invite(Messenger *m, m_conference_invite_cb *function)
{
m->conference_invite = function;
}
/** @brief the callback for group invites. */
void m_callback_group_invite(Messenger *m, m_group_invite_cb *function)
{
m->group_invite = function;
}
/** @brief Send a conference invite packet.
*
* return true on success
* return false on failure
*/
bool send_conference_invite_packet(const Messenger *m, int32_t friendnumber, const uint8_t *data, uint16_t length)
{
return write_cryptpacket_id(m, friendnumber, PACKET_ID_INVITE_CONFERENCE, data, length, false);
}
/** @brief Send a group invite packet.
*
* @retval true if success
*/
bool send_group_invite_packet(const Messenger *m, uint32_t friendnumber, const uint8_t *packet, uint16_t length)
{
return write_cryptpacket_id(m, friendnumber, PACKET_ID_INVITE_GROUPCHAT, packet, length, false);
}
/*** FILE SENDING */
/** @brief Set the callback for file send requests. */
void callback_file_sendrequest(Messenger *m, m_file_recv_cb *function)
{
m->file_sendrequest = function;
}
/** @brief Set the callback for file control requests. */
void callback_file_control(Messenger *m, m_file_recv_control_cb *function)
{
m->file_filecontrol = function;
}
/** @brief Set the callback for file data. */
void callback_file_data(Messenger *m, m_file_recv_chunk_cb *function)
{
m->file_filedata = function;
}
/** @brief Set the callback for file request chunk. */
void callback_file_reqchunk(Messenger *m, m_file_chunk_request_cb *function)
{
m->file_reqchunk = function;
}
#define MAX_FILENAME_LENGTH 255
/** @brief Copy the file transfer file id to file_id
*
* @retval 0 on success.
* @retval -1 if friend not valid.
* @retval -2 if filenumber not valid
*/
int file_get_id(const Messenger *m, int32_t friendnumber, uint32_t filenumber, uint8_t *file_id)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
if (m->friendlist[friendnumber].status != FRIEND_ONLINE) {
return -2;
}
uint32_t temp_filenum;
bool inbound;
uint8_t file_number;
if (filenumber >= (1 << 16)) {
inbound = true;
temp_filenum = (filenumber >> 16) - 1;
} else {
inbound = false;
temp_filenum = filenumber;
}
if (temp_filenum >= MAX_CONCURRENT_FILE_PIPES) {
return -2;
}
file_number = temp_filenum;
const struct File_Transfers *const ft = inbound
? &m->friendlist[friendnumber].file_receiving[file_number]
: &m->friendlist[friendnumber].file_sending[file_number];
if (ft->status == FILESTATUS_NONE) {
return -2;
}
memcpy(file_id, ft->id, FILE_ID_LENGTH);
return 0;
}
/** @brief Send a file send request.
* Maximum filename length is 255 bytes.
* @retval 1 on success
* @retval 0 on failure
*/
non_null()
static bool file_sendrequest(const Messenger *m, int32_t friendnumber, uint8_t filenumber, uint32_t file_type,
uint64_t filesize, const uint8_t *file_id, const uint8_t *filename, uint16_t filename_length)
{
if (!m_friend_exists(m, friendnumber)) {
return false;
}
if (filename_length > MAX_FILENAME_LENGTH) {
return false;
}
const uint16_t packet_size = 1 + sizeof(file_type) + sizeof(filesize) + FILE_ID_LENGTH + filename_length;
VLA(uint8_t, packet, packet_size);
packet[0] = filenumber;
file_type = net_htonl(file_type);
memcpy(packet + 1, &file_type, sizeof(file_type));
net_pack_u64(packet + 1 + sizeof(file_type), filesize);
memcpy(packet + 1 + sizeof(file_type) + sizeof(filesize), file_id, FILE_ID_LENGTH);
if (filename_length > 0) {
memcpy(packet + 1 + sizeof(file_type) + sizeof(filesize) + FILE_ID_LENGTH, filename, filename_length);
}
return write_cryptpacket_id(m, friendnumber, PACKET_ID_FILE_SENDREQUEST, packet, packet_size, false);
}
/** @brief Send a file send request.
*
* Maximum filename length is 255 bytes.
*
* @return file number on success
* @retval -1 if friend not found.
* @retval -2 if filename length invalid.
* @retval -3 if no more file sending slots left.
* @retval -4 if could not send packet (friend offline).
*/
long int new_filesender(const Messenger *m, int32_t friendnumber, uint32_t file_type, uint64_t filesize,
const uint8_t *file_id, const uint8_t *filename, uint16_t filename_length)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
if (filename_length > MAX_FILENAME_LENGTH) {
return -2;
}
uint32_t i;
for (i = 0; i < MAX_CONCURRENT_FILE_PIPES; ++i) {
if (m->friendlist[friendnumber].file_sending[i].status == FILESTATUS_NONE) {
break;
}
}
if (i == MAX_CONCURRENT_FILE_PIPES) {
return -3;
}
if (!file_sendrequest(m, friendnumber, i, file_type, filesize, file_id, filename, filename_length)) {
return -4;
}
struct File_Transfers *ft = &m->friendlist[friendnumber].file_sending[i];
ft->status = FILESTATUS_NOT_ACCEPTED;
ft->size = filesize;
ft->transferred = 0;
ft->requested = 0;
ft->paused = FILE_PAUSE_NOT;
memcpy(ft->id, file_id, FILE_ID_LENGTH);
return i;
}
non_null(1) nullable(6)
static bool send_file_control_packet(const Messenger *m, int32_t friendnumber, bool inbound, uint8_t filenumber,
uint8_t control_type, const uint8_t *data, uint16_t data_length)
{
assert(data_length == 0 || data != nullptr);
if ((unsigned int)(1 + 3 + data_length) > MAX_CRYPTO_DATA_SIZE) {
return false;
}
const uint16_t packet_size = 3 + data_length;
VLA(uint8_t, packet, packet_size);
packet[0] = inbound ? 1 : 0;
packet[1] = filenumber;
packet[2] = control_type;
if (data_length > 0) {
memcpy(packet + 3, data, data_length);
}
return write_cryptpacket_id(m, friendnumber, PACKET_ID_FILE_CONTROL, packet, packet_size, false);
}
/** @brief Send a file control request.
*
* @retval 0 on success
* @retval -1 if friend not valid.
* @retval -2 if friend not online.
* @retval -3 if file number invalid.
* @retval -4 if file control is bad.
* @retval -5 if file already paused.
* @retval -6 if resume file failed because it was only paused by the other.
* @retval -7 if resume file failed because it wasn't paused.
* @retval -8 if packet failed to send.
*/
int file_control(const Messenger *m, int32_t friendnumber, uint32_t filenumber, unsigned int control)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
if (m->friendlist[friendnumber].status != FRIEND_ONLINE) {
return -2;
}
uint32_t temp_filenum;
bool inbound;
uint8_t file_number;
if (filenumber >= (1 << 16)) {
inbound = true;
temp_filenum = (filenumber >> 16) - 1;
} else {
inbound = false;
temp_filenum = filenumber;
}
if (temp_filenum >= MAX_CONCURRENT_FILE_PIPES) {
return -3;
}
file_number = temp_filenum;
struct File_Transfers *ft;
if (inbound) {
ft = &m->friendlist[friendnumber].file_receiving[file_number];
} else {
ft = &m->friendlist[friendnumber].file_sending[file_number];
}
if (ft->status == FILESTATUS_NONE) {
return -3;
}
if (control > FILECONTROL_KILL) {
return -4;
}
if (control == FILECONTROL_PAUSE && ((ft->paused & FILE_PAUSE_US) != 0 || ft->status != FILESTATUS_TRANSFERRING)) {
return -5;
}
if (control == FILECONTROL_ACCEPT) {
if (ft->status == FILESTATUS_TRANSFERRING) {
if ((ft->paused & FILE_PAUSE_US) == 0) {
if ((ft->paused & FILE_PAUSE_OTHER) != 0) {
return -6;
}
return -7;
}
} else {
if (ft->status != FILESTATUS_NOT_ACCEPTED) {
return -7;
}
if (!inbound) {
return -6;
}
}
}
if (send_file_control_packet(m, friendnumber, inbound, file_number, control, nullptr, 0)) {
switch (control) {
case FILECONTROL_KILL: {
if (!inbound && (ft->status == FILESTATUS_TRANSFERRING || ft->status == FILESTATUS_FINISHED)) {
// We are actively sending that file, remove from list
--m->friendlist[friendnumber].num_sending_files;
}
ft->status = FILESTATUS_NONE;
break;
}
case FILECONTROL_PAUSE: {
ft->paused |= FILE_PAUSE_US;
break;
}
case FILECONTROL_ACCEPT: {
ft->status = FILESTATUS_TRANSFERRING;
if ((ft->paused & FILE_PAUSE_US) != 0) {
ft->paused ^= FILE_PAUSE_US;
}
break;
}
}
} else {
return -8;
}
return 0;
}
/** @brief Send a seek file control request.
*
* @retval 0 on success
* @retval -1 if friend not valid.
* @retval -2 if friend not online.
* @retval -3 if file number invalid.
* @retval -4 if not receiving file.
* @retval -5 if file status wrong.
* @retval -6 if position bad.
* @retval -8 if packet failed to send.
*/
int file_seek(const Messenger *m, int32_t friendnumber, uint32_t filenumber, uint64_t position)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
if (m->friendlist[friendnumber].status != FRIEND_ONLINE) {
return -2;
}
if (filenumber < (1 << 16)) {
// Not receiving.
return -4;
}
const uint32_t temp_filenum = (filenumber >> 16) - 1;
if (temp_filenum >= MAX_CONCURRENT_FILE_PIPES) {
return -3;
}
assert(temp_filenum <= UINT8_MAX);
const uint8_t file_number = temp_filenum;
// We're always receiving at this point.
struct File_Transfers *ft = &m->friendlist[friendnumber].file_receiving[file_number];
if (ft->status == FILESTATUS_NONE) {
return -3;
}
if (ft->status != FILESTATUS_NOT_ACCEPTED) {
return -5;
}
if (position >= ft->size) {
return -6;
}
uint8_t sending_pos[sizeof(uint64_t)];
net_pack_u64(sending_pos, position);
if (send_file_control_packet(m, friendnumber, true, file_number, FILECONTROL_SEEK, sending_pos,
sizeof(sending_pos))) {
ft->transferred = position;
} else {
return -8;
}
return 0;
}
/** @return packet number on success.
* @retval -1 on failure.
*/
non_null(1) nullable(4)
static int64_t send_file_data_packet(const Messenger *m, int32_t friendnumber, uint8_t filenumber, const uint8_t *data,
uint16_t length)
{
assert(length == 0 || data != nullptr);
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
const uint16_t packet_size = 2 + length;
VLA(uint8_t, packet, packet_size);
packet[0] = PACKET_ID_FILE_DATA;
packet[1] = filenumber;
if (length > 0) {
memcpy(packet + 2, data, length);
}
return write_cryptpacket(m->net_crypto, friend_connection_crypt_connection_id(m->fr_c,
m->friendlist[friendnumber].friendcon_id), packet, packet_size, true);
}
#define MAX_FILE_DATA_SIZE (MAX_CRYPTO_DATA_SIZE - 2)
#define MIN_SLOTS_FREE (CRYPTO_MIN_QUEUE_LENGTH / 4)
/** @brief Send file data.
*
* @retval 0 on success
* @retval -1 if friend not valid.
* @retval -2 if friend not online.
* @retval -3 if filenumber invalid.
* @retval -4 if file transfer not transferring.
* @retval -5 if bad data size.
* @retval -6 if packet queue full.
* @retval -7 if wrong position.
*/
int send_file_data(const Messenger *m, int32_t friendnumber, uint32_t filenumber, uint64_t position,
const uint8_t *data, uint16_t length)
{
assert(length == 0 || data != nullptr);
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
if (m->friendlist[friendnumber].status != FRIEND_ONLINE) {
return -2;
}
if (filenumber >= MAX_CONCURRENT_FILE_PIPES) {
return -3;
}
struct File_Transfers *ft = &m->friendlist[friendnumber].file_sending[filenumber];
if (ft->status != FILESTATUS_TRANSFERRING) {
return -4;
}
if (length > MAX_FILE_DATA_SIZE) {
return -5;
}
if (ft->size - ft->transferred < length) {
return -5;
}
if (ft->size != UINT64_MAX && length != MAX_FILE_DATA_SIZE && (ft->transferred + length) != ft->size) {
return -5;
}
if (position != ft->transferred || (ft->requested <= position && ft->size != 0)) {
return -7;
}
/* Prevent file sending from filling up the entire buffer preventing messages from being sent.
* TODO(irungentoo): remove */
if (crypto_num_free_sendqueue_slots(m->net_crypto, friend_connection_crypt_connection_id(m->fr_c,
m->friendlist[friendnumber].friendcon_id)) < MIN_SLOTS_FREE) {
return -6;
}
const int64_t ret = send_file_data_packet(m, friendnumber, filenumber, data, length);
if (ret != -1) {
// TODO(irungentoo): record packet ids to check if other received complete file.
ft->transferred += length;
if (length != MAX_FILE_DATA_SIZE || ft->size == ft->transferred) {
ft->status = FILESTATUS_FINISHED;
ft->last_packet_number = ret;
}
return 0;
}
return -6;
}
/**
* Iterate over all file transfers and request chunks (from the client) for each
* of them.
*
* The free_slots parameter is updated by this function.
*
* @param m Our messenger object.
* @param friendnumber The friend we're sending files to.
* @param userdata The client userdata to pass along to chunk request callbacks.
* @param free_slots A pointer to the number of free send queue slots in the
* crypto connection.
* @return true if there's still work to do, false otherwise.
*
*/
non_null()
static bool do_all_filetransfers(Messenger *m, int32_t friendnumber, void *userdata, uint32_t *free_slots)
{
Friend *const friendcon = &m->friendlist[friendnumber];
// Iterate over file transfers as long as we're sending files
for (uint32_t i = 0; i < MAX_CONCURRENT_FILE_PIPES; ++i) {
if (friendcon->num_sending_files == 0) {
// no active file transfers anymore
return false;
}
if (*free_slots == 0) {
// send buffer full enough
return false;
}
struct File_Transfers *const ft = &friendcon->file_sending[i];
if (ft->status == FILESTATUS_NONE || ft->status == FILESTATUS_NOT_ACCEPTED) {
// Filetransfers not actively sending, nothing to do
continue;
}
if (max_speed_reached(m->net_crypto, friend_connection_crypt_connection_id(
m->fr_c, friendcon->friendcon_id))) {
LOGGER_DEBUG(m->log, "maximum connection speed reached");
// connection doesn't support any more data
return false;
}
// If the file transfer is complete, we request a chunk of size 0.
if (ft->status == FILESTATUS_FINISHED && friend_received_packet(m, friendnumber, ft->last_packet_number) == 0) {
if (m->file_reqchunk != nullptr) {
m->file_reqchunk(m, friendnumber, i, ft->transferred, 0, userdata);
}
// Now it's inactive, we're no longer sending this.
ft->status = FILESTATUS_NONE;
--friendcon->num_sending_files;
} else if (ft->status == FILESTATUS_TRANSFERRING && ft->paused == FILE_PAUSE_NOT) {
if (ft->size == 0) {
/* Send 0 data to friend if file is 0 length. */
send_file_data(m, friendnumber, i, 0, nullptr, 0);
continue;
}
if (ft->size == ft->requested) {
// This file transfer is done.
continue;
}
const uint16_t length = min_u64(ft->size - ft->requested, MAX_FILE_DATA_SIZE);
const uint64_t position = ft->requested;
ft->requested += length;
if (m->file_reqchunk != nullptr) {
m->file_reqchunk(m, friendnumber, i, position, length, userdata);
}
// The allocated slot is no longer free.
--*free_slots;
}
}
return true;
}
non_null(1) nullable(3)
static void do_reqchunk_filecb(Messenger *m, int32_t friendnumber, void *userdata)
{
// We're not currently doing any file transfers.
if (m->friendlist[friendnumber].num_sending_files == 0) {
return;
}
// The number of packet slots left in the sendbuffer.
// This is a per friend count (CRYPTO_PACKET_BUFFER_SIZE).
uint32_t free_slots = crypto_num_free_sendqueue_slots(
m->net_crypto,
friend_connection_crypt_connection_id(
m->fr_c,
m->friendlist[friendnumber].friendcon_id));
// We keep MIN_SLOTS_FREE slots free for other packets, otherwise file
// transfers might block other traffic for a long time.
free_slots = max_s32(0, (int32_t)free_slots - MIN_SLOTS_FREE);
// Maximum number of outer loops below. If the client doesn't send file
// chunks from within the chunk request callback handler, we never realise
// that the file transfer has finished and may end up in an infinite loop.
//
// Request up to that number of chunks per file from the client
//
// TODO(Jfreegman): set this cap dynamically
const uint32_t max_ft_loops = 128;
for (uint32_t i = 0; i < max_ft_loops; ++i) {
if (!do_all_filetransfers(m, friendnumber, userdata, &free_slots)) {
break;
}
if (free_slots == 0) {
// stop when the buffer is full enough
break;
}
}
}
/** @brief Run this when the friend disconnects.
* Kill all current file transfers.
*/
static void break_files(const Messenger *m, int32_t friendnumber)
{
Friend *const f = &m->friendlist[friendnumber];
// TODO(irungentoo): Inform the client which file transfers get killed with a callback?
for (uint32_t i = 0; i < MAX_CONCURRENT_FILE_PIPES; ++i) {
f->file_sending[i].status = FILESTATUS_NONE;
f->file_receiving[i].status = FILESTATUS_NONE;
}
}
non_null()
static struct File_Transfers *get_file_transfer(bool outbound, uint8_t filenumber,
uint32_t *real_filenumber, Friend *sender)
{
struct File_Transfers *ft;
if (outbound) {
*real_filenumber = filenumber;
ft = &sender->file_sending[filenumber];
} else {
*real_filenumber = (filenumber + 1) << 16;
ft = &sender->file_receiving[filenumber];
}
if (ft->status == FILESTATUS_NONE) {
return nullptr;
}
return ft;
}
/** @retval -1 on failure
* @retval 0 on success.
*/
non_null(1, 6) nullable(8)
static int handle_filecontrol(Messenger *m, int32_t friendnumber, bool outbound, uint8_t filenumber,
uint8_t control_type, const uint8_t *data, uint16_t length, void *userdata)
{
uint32_t real_filenumber;
struct File_Transfers *ft = get_file_transfer(outbound, filenumber, &real_filenumber, &m->friendlist[friendnumber]);
if (ft == nullptr) {
LOGGER_DEBUG(m->log, "file control (friend %d, file %d): file transfer does not exist; telling the other to kill it",
friendnumber, filenumber);
send_file_control_packet(m, friendnumber, !outbound, filenumber, FILECONTROL_KILL, nullptr, 0);
return -1;
}
switch (control_type) {
case FILECONTROL_ACCEPT: {
if (outbound && ft->status == FILESTATUS_NOT_ACCEPTED) {
ft->status = FILESTATUS_TRANSFERRING;
++m->friendlist[friendnumber].num_sending_files;
} else {
if ((ft->paused & FILE_PAUSE_OTHER) != 0) {
ft->paused ^= FILE_PAUSE_OTHER;
} else {
LOGGER_DEBUG(m->log, "file control (friend %d, file %d): friend told us to resume file transfer that wasn't paused",
friendnumber, filenumber);
return -1;
}
}
if (m->file_filecontrol != nullptr) {
m->file_filecontrol(m, friendnumber, real_filenumber, control_type, userdata);
}
return 0;
}
case FILECONTROL_PAUSE: {
if ((ft->paused & FILE_PAUSE_OTHER) != 0 || ft->status != FILESTATUS_TRANSFERRING) {
LOGGER_DEBUG(m->log, "file control (friend %d, file %d): friend told us to pause file transfer that is already paused",
friendnumber, filenumber);
return -1;
}
ft->paused |= FILE_PAUSE_OTHER;
if (m->file_filecontrol != nullptr) {
m->file_filecontrol(m, friendnumber, real_filenumber, control_type, userdata);
}
return 0;
}
case FILECONTROL_KILL: {
if (m->file_filecontrol != nullptr) {
m->file_filecontrol(m, friendnumber, real_filenumber, control_type, userdata);
}
if (outbound && (ft->status == FILESTATUS_TRANSFERRING || ft->status == FILESTATUS_FINISHED)) {
--m->friendlist[friendnumber].num_sending_files;
}
ft->status = FILESTATUS_NONE;
return 0;
}
case FILECONTROL_SEEK: {
uint64_t position;
if (length != sizeof(position)) {
LOGGER_DEBUG(m->log, "file control (friend %d, file %d): expected payload of length %d, but got %d",
friendnumber, filenumber, (uint32_t)sizeof(position), length);
return -1;
}
/* seek can only be sent by the receiver to seek before resuming broken transfers. */
if (ft->status != FILESTATUS_NOT_ACCEPTED || !outbound) {
LOGGER_DEBUG(m->log,
"file control (friend %d, file %d): seek was either sent by a sender or by the receiver after accepting",
friendnumber, filenumber);
return -1;
}
net_unpack_u64(data, &position);
if (position >= ft->size) {
LOGGER_DEBUG(m->log,
"file control (friend %d, file %d): seek position %ld exceeds file size %ld",
friendnumber, filenumber, (unsigned long)position, (unsigned long)ft->size);
return -1;
}
ft->requested = position;
ft->transferred = position;
return 0;
}
default: {
LOGGER_DEBUG(m->log, "file control (friend %d, file %d): invalid file control: %d",
friendnumber, filenumber, control_type);
return -1;
}
}
}
static int m_handle_lossy_packet(void *object, int friendcon_id, const uint8_t *data, uint16_t length,
void *userdata)
{
Messenger *m = (Messenger *)object;
if (!m_friend_exists(m, friendcon_id)) {
return 1;
}
if (m->lossy_packethandler != nullptr) {
m->lossy_packethandler(m, friendcon_id, data[0], data, length, userdata);
}
return 1;
}
void custom_lossy_packet_registerhandler(Messenger *m, m_friend_lossy_packet_cb *lossy_packethandler)
{
m->lossy_packethandler = lossy_packethandler;
}
int m_send_custom_lossy_packet(const Messenger *m, int32_t friendnumber, const uint8_t *data, uint32_t length)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
if (length == 0 || length > MAX_CRYPTO_DATA_SIZE) {
return -2;
}
if (data[0] < PACKET_ID_RANGE_LOSSY_START || data[0] > PACKET_ID_RANGE_LOSSY_END) {
return -3;
}
if (m->friendlist[friendnumber].status != FRIEND_ONLINE) {
return -4;
}
if (send_lossy_cryptpacket(m->net_crypto, friend_connection_crypt_connection_id(m->fr_c,
m->friendlist[friendnumber].friendcon_id), data, length) == -1) {
return -5;
}
return 0;
}
non_null(1, 3) nullable(5)
static int handle_custom_lossless_packet(void *object, int friend_num, const uint8_t *packet, uint16_t length,
void *userdata)
{
Messenger *m = (Messenger *)object;
if (!m_friend_exists(m, friend_num)) {
return -1;
}
if (packet[0] < PACKET_ID_RANGE_LOSSLESS_CUSTOM_START || packet[0] > PACKET_ID_RANGE_LOSSLESS_CUSTOM_END) {
// allow PACKET_ID_MSI packets to be handled by custom packet handler
if (packet[0] != PACKET_ID_MSI) {
return -1;
}
}
if (m->lossless_packethandler != nullptr) {
m->lossless_packethandler(m, friend_num, packet[0], packet, length, userdata);
}
return 1;
}
void custom_lossless_packet_registerhandler(Messenger *m, m_friend_lossless_packet_cb *lossless_packethandler)
{
m->lossless_packethandler = lossless_packethandler;
}
int send_custom_lossless_packet(const Messenger *m, int32_t friendnumber, const uint8_t *data, uint32_t length)
{
if (!m_friend_exists(m, friendnumber)) {
return -1;
}
if (length == 0 || length > MAX_CRYPTO_DATA_SIZE) {
return -2;
}
if ((data[0] < PACKET_ID_RANGE_LOSSLESS_CUSTOM_START || data[0] > PACKET_ID_RANGE_LOSSLESS_CUSTOM_END)
&& data[0] != PACKET_ID_MSI) {
return -3;
}
if (m->friendlist[friendnumber].status != FRIEND_ONLINE) {
return -4;
}
if (write_cryptpacket(m->net_crypto, friend_connection_crypt_connection_id(m->fr_c,
m->friendlist[friendnumber].friendcon_id), data, length, true) == -1) {
return -5;
}
return 0;
}
/** Function to filter out some friend requests*/
non_null()
static int friend_already_added(void *object, const uint8_t *public_key)
{
const Messenger *m = (const Messenger *)object;
if (getfriend_id(m, public_key) == -1) {
return 0;
}
return -1;
}
/** @brief Check for and handle a timed-out friend request.
*
* If the request has timed-out then the friend status is set back to FRIEND_ADDED.
* @param friendcon_id friendlist index of the timed-out friend
* @param t time
*/
non_null(1) nullable(4)
static void check_friend_request_timed_out(Messenger *m, uint32_t friendcon_id, uint64_t t, void *userdata)
{
Friend *f = &m->friendlist[friendcon_id];
if (f->friendrequest_lastsent + f->friendrequest_timeout < t) {
set_friend_status(m, friendcon_id, FRIEND_ADDED, userdata);
/* Double the default timeout every time if friendrequest is assumed
* to have been sent unsuccessfully.
*/
f->friendrequest_timeout *= 2;
}
}
non_null(1) nullable(4)
static int m_handle_status(void *object, int friendcon_id, bool status, void *userdata)
{
Messenger *m = (Messenger *)object;
if (status) { /* Went online. */
send_online_packet(m, m->friendlist[friendcon_id].friendcon_id);
} else { /* Went offline. */
if (m->friendlist[friendcon_id].status == FRIEND_ONLINE) {
set_friend_status(m, friendcon_id, FRIEND_CONFIRMED, userdata);
}
}
return 0;
}
non_null(1, 3) nullable(5)
static int m_handle_packet_offline(Messenger *m, const int friendcon_id, const uint8_t *data, const uint16_t data_length, void *userdata)
{
if (data_length == 0) {
set_friend_status(m, friendcon_id, FRIEND_CONFIRMED, userdata);
}
return 0;
}
non_null(1, 3) nullable(5)
static int m_handle_packet_nickname(Messenger *m, const int friendcon_id, const uint8_t *data, const uint16_t data_length, void *userdata)
{
if (data_length > MAX_NAME_LENGTH) {
return 0;
}
/* Make sure the NULL terminator is present. */
VLA(uint8_t, data_terminated, data_length + 1);
memcpy(data_terminated, data, data_length);
data_terminated[data_length] = 0;
/* inform of namechange before we overwrite the old name */
if (m->friend_namechange != nullptr) {
m->friend_namechange(m, friendcon_id, data_terminated, data_length, userdata);
}
memcpy(m->friendlist[friendcon_id].name, data_terminated, data_length);
m->friendlist[friendcon_id].name_length = data_length;
return 0;
}
non_null(1, 3) nullable(5)
static int m_handle_packet_statusmessage(Messenger *m, const int friendcon_id, const uint8_t *data, const uint16_t data_length, void *userdata)
{
if (data_length > MAX_STATUSMESSAGE_LENGTH) {
return 0;
}
/* Make sure the NULL terminator is present. */
VLA(uint8_t, data_terminated, data_length + 1);
memcpy(data_terminated, data, data_length);
data_terminated[data_length] = 0;
if (m->friend_statusmessagechange != nullptr) {
m->friend_statusmessagechange(m, friendcon_id, data_terminated, data_length, userdata);
}
set_friend_statusmessage(m, friendcon_id, data_terminated, data_length);
return 0;
}
non_null(1, 3) nullable(5)
static int m_handle_packet_userstatus(Messenger *m, const int friendcon_id, const uint8_t *data, const uint16_t data_length, void *userdata)
{
if (data_length != 1) {
return 0;
}
Userstatus status;
if (!userstatus_from_int(data[0], &status)) {
return 0;
}
if (m->friend_userstatuschange != nullptr) {
m->friend_userstatuschange(m, friendcon_id, status, userdata);
}
set_friend_userstatus(m, friendcon_id, status);
return 0;
}
non_null(1, 3) nullable(5)
static int m_handle_packet_typing(Messenger *m, const int friendcon_id, const uint8_t *data, const uint16_t data_length, void *userdata)
{
if (data_length != 1) {
return 0;
}
const bool typing = data[0] != 0;
set_friend_typing(m, friendcon_id, typing);
if (m->friend_typingchange != nullptr) {
m->friend_typingchange(m, friendcon_id, typing, userdata);
}
return 0;
}
non_null(1, 3) nullable(6)
static int m_handle_packet_message(Messenger *m, const int friendcon_id, const uint8_t *data, const uint16_t data_length, const Message_Type message_type, void *userdata)
{
if (data_length == 0) {
return 0;
}
const uint8_t *message = data;
const uint16_t message_length = data_length;
/* Make sure the NULL terminator is present. */
VLA(uint8_t, message_terminated, message_length + 1);
memcpy(message_terminated, message, message_length);
message_terminated[message_length] = 0;
if (m->friend_message != nullptr) {
m->friend_message(m, friendcon_id, message_type, message_terminated, message_length, userdata);
}
return 0;
}
non_null(1, 3) nullable(5)
static int m_handle_packet_invite_conference(Messenger *m, const int friendcon_id, const uint8_t *data, const uint16_t data_length, void *userdata)
{
if (data_length == 0) {
return 0;
}
if (m->conference_invite != nullptr) {
m->conference_invite(m, friendcon_id, data, data_length, userdata);
}
return 0;
}
non_null(1, 3) nullable(5)
static int m_handle_packet_file_sendrequest(Messenger *m, const int friendcon_id, const uint8_t *data, const uint16_t data_length, void *userdata)
{
const unsigned int head_length = 1 + sizeof(uint32_t) + sizeof(uint64_t) + FILE_ID_LENGTH;
if (data_length < head_length) {
return 0;
}
const uint8_t filenumber = data[0];
#if UINT8_MAX >= MAX_CONCURRENT_FILE_PIPES
if (filenumber >= MAX_CONCURRENT_FILE_PIPES) {
return 0;
}
#endif /* UINT8_MAX >= MAX_CONCURRENT_FILE_PIPES */
uint64_t filesize;
uint32_t file_type;
const uint16_t filename_length = data_length - head_length;
if (filename_length > MAX_FILENAME_LENGTH) {
return 0;
}
memcpy(&file_type, data + 1, sizeof(file_type));
file_type = net_ntohl(file_type);
net_unpack_u64(data + 1 + sizeof(uint32_t), &filesize);
struct File_Transfers *ft = &m->friendlist[friendcon_id].file_receiving[filenumber];
if (ft->status != FILESTATUS_NONE) {
return 0;
}
ft->status = FILESTATUS_NOT_ACCEPTED;
ft->size = filesize;
ft->transferred = 0;
ft->paused = FILE_PAUSE_NOT;
memcpy(ft->id, data + 1 + sizeof(uint32_t) + sizeof(uint64_t), FILE_ID_LENGTH);
VLA(uint8_t, filename_terminated, filename_length + 1);
const uint8_t *filename = nullptr;
if (filename_length > 0) {
/* Force NULL terminate file name. */
memcpy(filename_terminated, data + head_length, filename_length);
filename_terminated[filename_length] = 0;
filename = filename_terminated;
}
uint32_t real_filenumber = filenumber;
real_filenumber += 1;
real_filenumber <<= 16;
if (m->file_sendrequest != nullptr) {
m->file_sendrequest(m, friendcon_id, real_filenumber, file_type, filesize, filename, filename_length,
userdata);
}
return 0;
}
non_null(1, 3) nullable(5)
static int m_handle_packet_file_control(Messenger *m, const int friendcon_id, const uint8_t *data, const uint16_t data_length, void *userdata)
{
if (data_length < 3) {
return 0;
}
// On the other side, "outbound" is "inbound", i.e. if they send 1,
// that means "inbound" on their side, but we call it "outbound"
// here.
const bool outbound = data[0] == 1;
const uint8_t filenumber = data[1];
const uint8_t control_type = data[2];
#if UINT8_MAX >= MAX_CONCURRENT_FILE_PIPES
if (filenumber >= MAX_CONCURRENT_FILE_PIPES) {
return 0;
}
#endif /* UINT8_MAX >= MAX_CONCURRENT_FILE_PIPES */
if (handle_filecontrol(m, friendcon_id, outbound, filenumber, control_type, data + 3, data_length - 3, userdata) == -1) {
// TODO(iphydf): Do something different here? Right now, this
// check is pointless.
return 0;
}
return 0;
}
non_null(1, 3) nullable(5)
static int m_handle_packet_file_data(Messenger *m, const int friendcon_id, const uint8_t *data, const uint16_t data_length, void *userdata)
{
if (data_length < 1) {
return 0;
}
const uint8_t filenumber = data[0];
#if UINT8_MAX >= MAX_CONCURRENT_FILE_PIPES
if (filenumber >= MAX_CONCURRENT_FILE_PIPES) {
return 0;
}
#endif /* UINT8_MAX >= MAX_CONCURRENT_FILE_PIPES */
struct File_Transfers *ft = &m->friendlist[friendcon_id].file_receiving[filenumber];
if (ft->status != FILESTATUS_TRANSFERRING) {
return 0;
}
uint64_t position = ft->transferred;
uint32_t real_filenumber = filenumber;
real_filenumber += 1;
real_filenumber <<= 16;
uint16_t file_data_length = data_length - 1;
const uint8_t *file_data;
if (file_data_length == 0) {
file_data = nullptr;
} else {
file_data = data + 1;
}
/* Prevent more data than the filesize from being passed to clients. */
if ((ft->transferred + file_data_length) > ft->size) {
file_data_length = ft->size - ft->transferred;
}
if (m->file_filedata != nullptr) {
m->file_filedata(m, friendcon_id, real_filenumber, position, file_data, file_data_length, userdata);
}
ft->transferred += file_data_length;
if (file_data_length > 0 && (ft->transferred >= ft->size || file_data_length != MAX_FILE_DATA_SIZE)) {
file_data_length = 0;
file_data = nullptr;
position = ft->transferred;
/* Full file received. */
if (m->file_filedata != nullptr) {
m->file_filedata(m, friendcon_id, real_filenumber, position, file_data, file_data_length, userdata);
}
}
/* Data is zero, filetransfer is over. */
if (file_data_length == 0) {
ft->status = FILESTATUS_NONE;
}
return 0;
}
non_null(1, 3) nullable(5)
static int m_handle_packet_invite_groupchat(Messenger *m, const int friendcon_id, const uint8_t *data, const uint16_t data_length, void *userdata)
{
// first two bytes are messenger packet type and group invite type
if (data_length < 2 + GC_JOIN_DATA_LENGTH) {
return 0;
}
const uint8_t invite_type = data[1];
const uint8_t *join_data = data + 2;
const uint32_t join_data_len = data_length - 2;
if (m->group_invite != nullptr && data[1] == GROUP_INVITE && data_length != 2 + GC_JOIN_DATA_LENGTH) {
if (group_not_added(m->group_handler, join_data, join_data_len)) {
m->group_invite(m, friendcon_id, join_data, GC_JOIN_DATA_LENGTH,
join_data + GC_JOIN_DATA_LENGTH, join_data_len - GC_JOIN_DATA_LENGTH, userdata);
}
} else if (invite_type == GROUP_INVITE_ACCEPTED) {
handle_gc_invite_accepted_packet(m->group_handler, friendcon_id, join_data, join_data_len);
} else if (invite_type == GROUP_INVITE_CONFIRMATION) {
handle_gc_invite_confirmed_packet(m->group_handler, friendcon_id, join_data, join_data_len);
}
return 0;
}
non_null(1, 3) nullable(5)
static int m_handle_packet(void *object, int friendcon_id, const uint8_t *data, uint16_t length, void *userdata)
{
Messenger *m = (Messenger *)object;
if (length == 0) {
return -1;
}
const uint8_t packet_id = data[0];
const uint8_t *payload = data + 1;
const uint16_t payload_length = length - 1;
if (m->friendlist[friendcon_id].status != FRIEND_ONLINE) {
if (packet_id == PACKET_ID_ONLINE && length == 1) {
set_friend_status(m, friendcon_id, FRIEND_ONLINE, userdata);
send_online_packet(m, m->friendlist[friendcon_id].friendcon_id);
} else {
return -1;
}
}
switch (packet_id) {
// TODO(Green-Sky): now all return 0 on error AND success, make errors errors?
case PACKET_ID_OFFLINE:
return m_handle_packet_offline(m, friendcon_id, payload, payload_length, userdata);
case PACKET_ID_NICKNAME:
return m_handle_packet_nickname(m, friendcon_id, payload, payload_length, userdata);
case PACKET_ID_STATUSMESSAGE:
return m_handle_packet_statusmessage(m, friendcon_id, payload, payload_length, userdata);
case PACKET_ID_USERSTATUS:
return m_handle_packet_userstatus(m, friendcon_id, payload, payload_length, userdata);
case PACKET_ID_TYPING:
return m_handle_packet_typing(m, friendcon_id, payload, payload_length, userdata);
case PACKET_ID_MESSAGE:
return m_handle_packet_message(m, friendcon_id, payload, payload_length, MESSAGE_NORMAL, userdata);
case PACKET_ID_ACTION:
return m_handle_packet_message(m, friendcon_id, payload, payload_length, MESSAGE_ACTION, userdata);
case PACKET_ID_INVITE_CONFERENCE:
return m_handle_packet_invite_conference(m, friendcon_id, payload, payload_length, userdata);
case PACKET_ID_FILE_SENDREQUEST:
return m_handle_packet_file_sendrequest(m, friendcon_id, payload, payload_length, userdata);
case PACKET_ID_FILE_CONTROL:
return m_handle_packet_file_control(m, friendcon_id, payload, payload_length, userdata);
case PACKET_ID_FILE_DATA:
return m_handle_packet_file_data(m, friendcon_id, payload, payload_length, userdata);
case PACKET_ID_MSI:
return handle_custom_lossless_packet(object, friendcon_id, data, length, userdata);
case PACKET_ID_INVITE_GROUPCHAT:
return m_handle_packet_invite_groupchat(m, friendcon_id, payload, payload_length, userdata);
}
return handle_custom_lossless_packet(object, friendcon_id, data, length, userdata);
}
non_null(1) nullable(2)
static void do_friends(Messenger *m, void *userdata)
{
const uint64_t temp_time = mono_time_get(m->mono_time);
for (uint32_t i = 0; i < m->numfriends; ++i) {
if (m->friendlist[i].status == FRIEND_ADDED) {
const int fr = send_friend_request_packet(m->fr_c, m->friendlist[i].friendcon_id, m->friendlist[i].friendrequest_nospam,
m->friendlist[i].info,
m->friendlist[i].info_size);
if (fr >= 0) {
set_friend_status(m, i, FRIEND_REQUESTED, userdata);
m->friendlist[i].friendrequest_lastsent = temp_time;
}
}
if (m->friendlist[i].status == FRIEND_REQUESTED) {
/* If we didn't connect to friend after successfully sending him a friend
* request the request is deemed unsuccessful so we set the status back to
* FRIEND_ADDED and try again.
*/
check_friend_request_timed_out(m, i, temp_time, userdata);
}
if (m->friendlist[i].status == FRIEND_ONLINE) { /* friend is online. */
if (!m->friendlist[i].name_sent) {
if (m_sendname(m, i, m->name, m->name_length)) {
m->friendlist[i].name_sent = true;
}
}
if (!m->friendlist[i].statusmessage_sent) {
if (send_statusmessage(m, i, m->statusmessage, m->statusmessage_length)) {
m->friendlist[i].statusmessage_sent = true;
}
}
if (!m->friendlist[i].userstatus_sent) {
if (send_userstatus(m, i, m->userstatus)) {
m->friendlist[i].userstatus_sent = true;
}
}
if (!m->friendlist[i].user_istyping_sent) {
if (send_user_istyping(m, i, m->friendlist[i].user_istyping)) {
m->friendlist[i].user_istyping_sent = true;
}
}
check_friend_tcp_udp(m, i, userdata);
do_receipts(m, i, userdata);
do_reqchunk_filecb(m, i, userdata);
m->friendlist[i].last_seen_time = (uint64_t) time(nullptr);
}
}
}
non_null(1) nullable(2)
static void m_connection_status_callback(Messenger *m, void *userdata)
{
const Onion_Connection_Status conn_status = onion_connection_status(m->onion_c);
if (conn_status != m->last_connection_status) {
if (m->core_connection_change != nullptr) {
m->core_connection_change(m, conn_status, userdata);
}
m->last_connection_status = conn_status;
}
}
#define DUMPING_CLIENTS_FRIENDS_EVERY_N_SECONDS 60UL
#define IDSTRING_LEN (CRYPTO_PUBLIC_KEY_SIZE * 2 + 1)
/** id_str should be of length at least IDSTRING_LEN */
non_null()
static char *id_to_string(const uint8_t *pk, char *id_str, size_t length)
{
if (length < IDSTRING_LEN) {
snprintf(id_str, length, "Bad buf length");
return id_str;
}
for (uint32_t i = 0; i < CRYPTO_PUBLIC_KEY_SIZE; ++i) {
snprintf(&id_str[i * 2], length - i * 2, "%02X", pk[i]);
}
id_str[CRYPTO_PUBLIC_KEY_SIZE * 2] = '\0';
return id_str;
}
/** @brief Minimum messenger run interval in ms
* TODO(mannol): A/V
*/
#define MIN_RUN_INTERVAL 50
/**
* @brief Return the time in milliseconds before `do_messenger()` should be called again
* for optimal performance.
*
* @return time (in ms) before the next `do_messenger()` needs to be run on success.
*/
uint32_t messenger_run_interval(const Messenger *m)
{
const uint32_t crypto_interval = crypto_run_interval(m->net_crypto);
if (crypto_interval > MIN_RUN_INTERVAL) {
return MIN_RUN_INTERVAL;
}
return crypto_interval;
}
/** @brief Attempts to create a DHT announcement for a group chat with our connection info. An
* announcement can only be created if we either have a UDP or TCP connection to the network.
*
* @retval true if success.
*/
non_null()
static bool self_announce_group(const Messenger *m, GC_Chat *chat, Onion_Friend *onion_friend)
{
GC_Public_Announce announce = {{{{{0}}}}};
const bool ip_port_is_set = chat->self_udp_status != SELF_UDP_STATUS_NONE;
const int tcp_num = tcp_copy_connected_relays(chat->tcp_conn, announce.base_announce.tcp_relays,
GCA_MAX_ANNOUNCED_TCP_RELAYS);
if (tcp_num == 0 && !ip_port_is_set) {
onion_friend_set_gc_data(onion_friend, nullptr, 0);
return false;
}
announce.base_announce.tcp_relays_count = (uint8_t)tcp_num;
announce.base_announce.ip_port_is_set = ip_port_is_set;
if (ip_port_is_set) {
memcpy(&announce.base_announce.ip_port, &chat->self_ip_port, sizeof(IP_Port));
}
memcpy(announce.base_announce.peer_public_key, chat->self_public_key.enc, ENC_PUBLIC_KEY_SIZE);
memcpy(announce.chat_public_key, get_chat_id(&chat->chat_public_key), ENC_PUBLIC_KEY_SIZE);
uint8_t gc_data[GCA_MAX_DATA_LENGTH];
const int length = gca_pack_public_announce(m->log, gc_data, GCA_MAX_DATA_LENGTH, &announce);
if (length <= 0) {
onion_friend_set_gc_data(onion_friend, nullptr, 0);
return false;
}
if (gca_add_announce(m->mono_time, m->group_announce, &announce) == nullptr) {
onion_friend_set_gc_data(onion_friend, nullptr, 0);
return false;
}
onion_friend_set_gc_data(onion_friend, gc_data, (uint16_t)length);
chat->update_self_announces = false;
chat->last_time_self_announce = mono_time_get(chat->mono_time);
if (tcp_num > 0) {
pk_copy(chat->announced_tcp_relay_pk, announce.base_announce.tcp_relays[0].public_key);
} else {
memzero(chat->announced_tcp_relay_pk, sizeof(chat->announced_tcp_relay_pk));
}
LOGGER_DEBUG(chat->log, "Published group announce. TCP relays: %d, UDP status: %d", tcp_num,
chat->self_udp_status);
return true;
}
non_null()
static void do_gc_onion_friends(const Messenger *m)
{
const uint16_t num_friends = onion_get_friend_count(m->onion_c);
for (uint16_t i = 0; i < num_friends; ++i) {
Onion_Friend *onion_friend = onion_get_friend(m->onion_c, i);
if (!onion_friend_is_groupchat(onion_friend)) {
continue;
}
GC_Chat *chat = gc_get_group_by_public_key(m->group_handler, onion_friend_get_gc_public_key(onion_friend));
if (chat == nullptr) {
continue;
}
if (chat->update_self_announces) {
self_announce_group(m, chat, onion_friend);
}
}
}
/** @brief The main loop that needs to be run at least 20 times per second. */
void do_messenger(Messenger *m, void *userdata)
{
// Add the TCP relays, but only if this is the first time calling do_messenger
if (!m->has_added_relays) {
m->has_added_relays = true;
for (uint16_t i = 0; i < m->num_loaded_relays; ++i) {
add_tcp_relay(m->net_crypto, &m->loaded_relays[i].ip_port, m->loaded_relays[i].public_key);
}
m->num_loaded_relays = 0;
if (m->tcp_server != nullptr) {
/* Add self tcp server. */
IP_Port local_ip_port;
local_ip_port.port = net_htons(m->options.tcp_server_port);
local_ip_port.ip.family = net_family_ipv4();
local_ip_port.ip.ip.v4 = get_ip4_loopback();
add_tcp_relay(m->net_crypto, &local_ip_port, tcp_server_public_key(m->tcp_server));
}
}
if (!m->options.udp_disabled) {
networking_poll(m->net, userdata);
do_dht(m->dht);
}
if (m->tcp_server != nullptr) {
do_tcp_server(m->tcp_server, m->mono_time);
}
do_net_crypto(m->net_crypto, userdata);
do_onion_client(m->onion_c);
do_friend_connections(m->fr_c, userdata);
do_friends(m, userdata);
do_gc(m->group_handler, userdata);
do_gca(m->mono_time, m->group_announce);
do_gc_onion_friends(m);
m_connection_status_callback(m, userdata);
if (mono_time_get(m->mono_time) > m->lastdump + DUMPING_CLIENTS_FRIENDS_EVERY_N_SECONDS) {
m->lastdump = mono_time_get(m->mono_time);
uint32_t last_pinged;
for (uint32_t client = 0; client < LCLIENT_LIST; ++client) {
const Client_data *cptr = dht_get_close_client(m->dht, client);
const IPPTsPng *const assocs[] = { &cptr->assoc4, &cptr->assoc6, nullptr };
for (const IPPTsPng * const *it = assocs; *it != nullptr; ++it) {
const IPPTsPng *const assoc = *it;
if (ip_isset(&assoc->ip_port.ip)) {
last_pinged = m->lastdump - assoc->last_pinged;
if (last_pinged > 999) {
last_pinged = 999;
}
Ip_Ntoa ip_str;
char id_str[IDSTRING_LEN];
LOGGER_TRACE(m->log, "C[%2u] %s:%u [%3u] %s",
client, net_ip_ntoa(&assoc->ip_port.ip, &ip_str),
net_ntohs(assoc->ip_port.port), last_pinged,
id_to_string(cptr->public_key, id_str, sizeof(id_str)));
}
}
}
/* dht contains additional "friends" (requests) */
const uint32_t num_dhtfriends = dht_get_num_friends(m->dht);
VLA(int32_t, m2dht, num_dhtfriends);
VLA(int32_t, dht2m, num_dhtfriends);
for (uint32_t friend_idx = 0; friend_idx < num_dhtfriends; ++friend_idx) {
m2dht[friend_idx] = -1;
dht2m[friend_idx] = -1;
if (friend_idx >= m->numfriends) {
continue;
}
for (uint32_t dhtfriend = 0; dhtfriend < dht_get_num_friends(m->dht); ++dhtfriend) {
if (pk_equal(m->friendlist[friend_idx].real_pk, dht_get_friend_public_key(m->dht, dhtfriend))) {
assert(dhtfriend < INT32_MAX);
m2dht[friend_idx] = (int32_t)dhtfriend;
break;
}
}
}
for (uint32_t friend_idx = 0; friend_idx < num_dhtfriends; ++friend_idx) {
if (m2dht[friend_idx] >= 0) {
assert(friend_idx < INT32_MAX);
dht2m[m2dht[friend_idx]] = (int32_t)friend_idx;
}
}
if (m->numfriends != dht_get_num_friends(m->dht)) {
LOGGER_TRACE(m->log, "Friend num in DHT %u != friend num in msger %u", dht_get_num_friends(m->dht), m->numfriends);
}
for (uint32_t friend_idx = 0; friend_idx < num_dhtfriends; ++friend_idx) {
const Friend *const msgfptr = dht2m[friend_idx] >= 0 ? &m->friendlist[dht2m[friend_idx]] : nullptr;
const DHT_Friend *const dhtfptr = dht_get_friend(m->dht, friend_idx);
if (msgfptr != nullptr) {
char id_str[IDSTRING_LEN];
LOGGER_TRACE(m->log, "F[%2u:%2u] <%s> %s",
dht2m[friend_idx], friend_idx, msgfptr->name,
id_to_string(msgfptr->real_pk, id_str, sizeof(id_str)));
} else {
char id_str[IDSTRING_LEN];
LOGGER_TRACE(m->log, "F[--:%2u] %s", friend_idx,
id_to_string(dht_friend_public_key(dhtfptr), id_str, sizeof(id_str)));
}
for (uint32_t client = 0; client < MAX_FRIEND_CLIENTS; ++client) {
const Client_data *cptr = dht_friend_client(dhtfptr, client);
const IPPTsPng *const assocs[] = {&cptr->assoc4, &cptr->assoc6};
for (size_t a = 0; a < sizeof(assocs) / sizeof(assocs[0]); ++a) {
const IPPTsPng *const assoc = assocs[a];
if (ip_isset(&assoc->ip_port.ip)) {
last_pinged = m->lastdump - assoc->last_pinged;
if (last_pinged > 999) {
last_pinged = 999;
}
Ip_Ntoa ip_str;
char id_str[IDSTRING_LEN];
LOGGER_TRACE(m->log, "F[%2u] => C[%2u] %s:%u [%3u] %s",
friend_idx, client, net_ip_ntoa(&assoc->ip_port.ip, &ip_str),
net_ntohs(assoc->ip_port.port), last_pinged,
id_to_string(cptr->public_key, id_str, sizeof(id_str)));
}
}
}
}
}
}
/** new messenger format for load/save, more robust and forward compatible */
#define SAVED_FRIEND_REQUEST_SIZE 1024
#define NUM_SAVED_PATH_NODES 8
struct Saved_Friend {
uint8_t status;
uint8_t real_pk[CRYPTO_PUBLIC_KEY_SIZE];
uint8_t info[SAVED_FRIEND_REQUEST_SIZE]; // the data that is sent during the friend requests we do.
uint16_t info_size; // Length of the info.
uint8_t name[MAX_NAME_LENGTH];
uint16_t name_length;
uint8_t statusmessage[MAX_STATUSMESSAGE_LENGTH];
uint16_t statusmessage_length;
uint8_t userstatus;
uint32_t friendrequest_nospam;
uint8_t last_seen_time[sizeof(uint64_t)];
};
static uint32_t friend_size(void)
{
uint32_t data = 0;
const struct Saved_Friend *const temp = nullptr;
#define VALUE_MEMBER(data, name) \
do { \
data += sizeof(name); \
} while (0)
#define ARRAY_MEMBER(data, name) \
do { \
data += sizeof(name); \
} while (0)
// Exactly the same in friend_load, friend_save, and friend_size
VALUE_MEMBER(data, temp->status);
ARRAY_MEMBER(data, temp->real_pk);
ARRAY_MEMBER(data, temp->info);
++data; // padding
VALUE_MEMBER(data, temp->info_size);
ARRAY_MEMBER(data, temp->name);
VALUE_MEMBER(data, temp->name_length);
ARRAY_MEMBER(data, temp->statusmessage);
++data; // padding
VALUE_MEMBER(data, temp->statusmessage_length);
VALUE_MEMBER(data, temp->userstatus);
data += 3; // padding
VALUE_MEMBER(data, temp->friendrequest_nospam);
ARRAY_MEMBER(data, temp->last_seen_time);
#undef VALUE_MEMBER
#undef ARRAY_MEMBER
return data;
}
non_null()
static uint8_t *friend_save(const struct Saved_Friend *temp, uint8_t *data)
{
#define VALUE_MEMBER(data, name) \
do { \
memcpy(data, &name, sizeof(name)); \
data += sizeof(name); \
} while (0)
#define ARRAY_MEMBER(data, name) \
do { \
memcpy(data, name, sizeof(name)); \
data += sizeof(name); \
} while (0)
// Exactly the same in friend_load, friend_save, and friend_size
VALUE_MEMBER(data, temp->status);
ARRAY_MEMBER(data, temp->real_pk);
ARRAY_MEMBER(data, temp->info);
++data; // padding
VALUE_MEMBER(data, temp->info_size);
ARRAY_MEMBER(data, temp->name);
VALUE_MEMBER(data, temp->name_length);
ARRAY_MEMBER(data, temp->statusmessage);
++data; // padding
VALUE_MEMBER(data, temp->statusmessage_length);
VALUE_MEMBER(data, temp->userstatus);
data += 3; // padding
VALUE_MEMBER(data, temp->friendrequest_nospam);
ARRAY_MEMBER(data, temp->last_seen_time);
#undef VALUE_MEMBER
#undef ARRAY_MEMBER
return data;
}
non_null()
static const uint8_t *friend_load(struct Saved_Friend *temp, const uint8_t *data)
{
#define VALUE_MEMBER(data, name) \
do { \
memcpy(&name, data, sizeof(name)); \
data += sizeof(name); \
} while (0)
#define ARRAY_MEMBER(data, name) \
do { \
memcpy(name, data, sizeof(name)); \
data += sizeof(name); \
} while (0)
// Exactly the same in friend_load, friend_save, and friend_size
VALUE_MEMBER(data, temp->status);
ARRAY_MEMBER(data, temp->real_pk);
ARRAY_MEMBER(data, temp->info);
++data; // padding
VALUE_MEMBER(data, temp->info_size);
ARRAY_MEMBER(data, temp->name);
VALUE_MEMBER(data, temp->name_length);
ARRAY_MEMBER(data, temp->statusmessage);
++data; // padding
VALUE_MEMBER(data, temp->statusmessage_length);
VALUE_MEMBER(data, temp->userstatus);
data += 3; // padding
VALUE_MEMBER(data, temp->friendrequest_nospam);
ARRAY_MEMBER(data, temp->last_seen_time);
#undef VALUE_MEMBER
#undef ARRAY_MEMBER
return data;
}
non_null()
static uint32_t m_state_plugins_size(const Messenger *m)
{
const uint32_t size32 = sizeof(uint32_t);
const uint32_t sizesubhead = size32 * 2;
uint32_t size = 0;
for (const Messenger_State_Plugin *plugin = m->options.state_plugins;
plugin != m->options.state_plugins + m->options.state_plugins_length;
++plugin) {
size += sizesubhead + plugin->size(m);
}
return size;
}
/** @brief Registers a state plugin for saving, loading, and getting the size of a section of the save.
*
* @retval true on success
* @retval false on error
*/
bool m_register_state_plugin(Messenger *m, State_Type type, m_state_size_cb *size_callback,
m_state_load_cb *load_callback,
m_state_save_cb *save_callback)
{
const uint32_t new_length = m->options.state_plugins_length + 1;
Messenger_State_Plugin *temp = (Messenger_State_Plugin *)mem_vrealloc(
m->mem, m->options.state_plugins, new_length, sizeof(Messenger_State_Plugin));
if (temp == nullptr) {
return false;
}
m->options.state_plugins = temp;
m->options.state_plugins_length = new_length;
const uint8_t index = m->options.state_plugins_length - 1;
m->options.state_plugins[index].type = type;
m->options.state_plugins[index].size = size_callback;
m->options.state_plugins[index].load = load_callback;
m->options.state_plugins[index].save = save_callback;
return true;
}
non_null()
static uint32_t m_plugin_size(const Messenger *m, State_Type type)
{
for (uint8_t i = 0; i < m->options.state_plugins_length; ++i) {
const Messenger_State_Plugin plugin = m->options.state_plugins[i];
if (plugin.type == type) {
return plugin.size(m);
}
}
LOGGER_ERROR(m->log, "Unknown type encountered: %u", type);
return UINT32_MAX;
}
/** return size of the messenger data (for saving). */
uint32_t messenger_size(const Messenger *m)
{
return m_state_plugins_size(m);
}
/** Save the messenger in data (must be allocated memory of size at least `Messenger_size()`) */
uint8_t *messenger_save(const Messenger *m, uint8_t *data)
{
for (uint8_t i = 0; i < m->options.state_plugins_length; ++i) {
const Messenger_State_Plugin plugin = m->options.state_plugins[i];
data = plugin.save(m, data);
}
return data;
}
// nospam state plugin
non_null()
static uint32_t nospam_keys_size(const Messenger *m)
{
return sizeof(uint32_t) + CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_SECRET_KEY_SIZE;
}
non_null()
static State_Load_Status load_nospam_keys(Messenger *m, const uint8_t *data, uint32_t length)
{
if (length != m_plugin_size(m, STATE_TYPE_NOSPAMKEYS)) {
return STATE_LOAD_STATUS_ERROR;
}
uint32_t nospam;
lendian_bytes_to_host32(&nospam, data);
set_nospam(m->fr, nospam);
load_secret_key(m->net_crypto, data + sizeof(uint32_t) + CRYPTO_PUBLIC_KEY_SIZE);
if (!pk_equal(data + sizeof(uint32_t), nc_get_self_public_key(m->net_crypto))) {
LOGGER_ERROR(m->log, "public key stored in savedata does not match its secret key");
return STATE_LOAD_STATUS_ERROR;
}
return STATE_LOAD_STATUS_CONTINUE;
}
non_null()
static uint8_t *save_nospam_keys(const Messenger *m, uint8_t *data)
{
const uint32_t len = m_plugin_size(m, STATE_TYPE_NOSPAMKEYS);
static_assert(sizeof(get_nospam(m->fr)) == sizeof(uint32_t), "nospam doesn't fit in a 32 bit int");
data = state_write_section_header(data, STATE_COOKIE_TYPE, len, STATE_TYPE_NOSPAMKEYS);
const uint32_t nospam = get_nospam(m->fr);
host_to_lendian_bytes32(data, nospam);
save_keys(m->net_crypto, data + sizeof(uint32_t));
data += len;
return data;
}
// DHT state plugin
non_null()
static uint32_t m_dht_size(const Messenger *m)
{
return dht_size(m->dht);
}
non_null()
static uint8_t *save_dht(const Messenger *m, uint8_t *data)
{
const uint32_t len = m_plugin_size(m, STATE_TYPE_DHT);
data = state_write_section_header(data, STATE_COOKIE_TYPE, len, STATE_TYPE_DHT);
dht_save(m->dht, data);
data += len;
return data;
}
non_null()
static State_Load_Status m_dht_load(Messenger *m, const uint8_t *data, uint32_t length)
{
dht_load(m->dht, data, length); // TODO(endoffile78): Should we throw an error if dht_load fails?
return STATE_LOAD_STATUS_CONTINUE;
}
// friendlist state plugin
non_null()
static uint32_t saved_friendslist_size(const Messenger *m)
{
return count_friendlist(m) * friend_size();
}
non_null()
static uint8_t *friends_list_save(const Messenger *m, uint8_t *data)
{
const uint32_t len = m_plugin_size(m, STATE_TYPE_FRIENDS);
data = state_write_section_header(data, STATE_COOKIE_TYPE, len, STATE_TYPE_FRIENDS);
uint32_t num = 0;
uint8_t *cur_data = data;
for (uint32_t i = 0; i < m->numfriends; ++i) {
if (m->friendlist[i].status > 0) {
struct Saved_Friend temp = { 0 };
temp.status = m->friendlist[i].status;
memcpy(temp.real_pk, m->friendlist[i].real_pk, CRYPTO_PUBLIC_KEY_SIZE);
if (temp.status < 3) {
// TODO(iphydf): Use uint16_t and min_u16 here.
const size_t friendrequest_length =
min_u32(m->friendlist[i].info_size,
min_u32(SAVED_FRIEND_REQUEST_SIZE, MAX_FRIEND_REQUEST_DATA_SIZE));
memcpy(temp.info, m->friendlist[i].info, friendrequest_length);
temp.info_size = net_htons(m->friendlist[i].info_size);
temp.friendrequest_nospam = m->friendlist[i].friendrequest_nospam;
} else {
temp.status = 3;
memcpy(temp.name, m->friendlist[i].name, m->friendlist[i].name_length);
temp.name_length = net_htons(m->friendlist[i].name_length);
memcpy(temp.statusmessage, m->friendlist[i].statusmessage, m->friendlist[i].statusmessage_length);
temp.statusmessage_length = net_htons(m->friendlist[i].statusmessage_length);
temp.userstatus = m->friendlist[i].userstatus;
net_pack_u64(temp.last_seen_time, m->friendlist[i].last_seen_time);
}
uint8_t *next_data = friend_save(&temp, cur_data);
assert(next_data - cur_data == friend_size());
#ifdef __LP64__
assert(memcmp(cur_data, &temp, friend_size()) == 0);
#endif /* __LP64__ */
cur_data = next_data;
++num;
}
}
assert(cur_data - data == num * friend_size());
data += len;
return data;
}
non_null()
static State_Load_Status friends_list_load(Messenger *m, const uint8_t *data, uint32_t length)
{
const uint32_t l_friend_size = friend_size();
if (length % l_friend_size != 0) {
return STATE_LOAD_STATUS_ERROR; // TODO(endoffile78): error or continue?
}
const uint32_t num = length / l_friend_size;
const uint8_t *cur_data = data;
for (uint32_t i = 0; i < num; ++i) {
struct Saved_Friend temp = { 0 };
const uint8_t *next_data = friend_load(&temp, cur_data);
assert(next_data - cur_data == l_friend_size);
cur_data = next_data;
if (temp.status >= 3) {
const int fnum = m_addfriend_norequest(m, temp.real_pk);
if (fnum < 0) {
continue;
}
setfriendname(m, fnum, temp.name, net_ntohs(temp.name_length));
set_friend_statusmessage(m, fnum, temp.statusmessage, net_ntohs(temp.statusmessage_length));
set_friend_userstatus(m, fnum, temp.userstatus);
net_unpack_u64(temp.last_seen_time, &m->friendlist[fnum].last_seen_time);
} else if (temp.status != 0) {
/* TODO(irungentoo): This is not a good way to do this. */
uint8_t address[FRIEND_ADDRESS_SIZE];
pk_copy(address, temp.real_pk);
memcpy(address + CRYPTO_PUBLIC_KEY_SIZE, &temp.friendrequest_nospam, sizeof(uint32_t));
uint16_t checksum = data_checksum(address, FRIEND_ADDRESS_SIZE - sizeof(checksum));
memcpy(address + CRYPTO_PUBLIC_KEY_SIZE + sizeof(uint32_t), &checksum, sizeof(checksum));
m_addfriend(m, address, temp.info, net_ntohs(temp.info_size));
}
}
return STATE_LOAD_STATUS_CONTINUE;
}
non_null()
static void pack_groupchats(const GC_Session *c, Bin_Pack *bp)
{
assert(bp != nullptr && c != nullptr);
bin_pack_array(bp, gc_count_groups(c));
for (uint32_t i = 0; i < c->chats_index; ++i) { // this loop must match the one in gc_count_groups()
const GC_Chat *chat = &c->chats[i];
if (!gc_group_is_valid(chat)) {
continue;
}
gc_group_save(chat, bp);
}
}
non_null()
static bool pack_groupchats_handler(const void *obj, const Logger *logger, Bin_Pack *bp)
{
const GC_Session *session = (const GC_Session *)obj;
pack_groupchats(session, bp);
return true; // TODO(iphydf): Return bool from pack functions.
}
non_null()
static uint32_t saved_groups_size(const Messenger *m)
{
const GC_Session *session = m->group_handler;
return bin_pack_obj_size(pack_groupchats_handler, session, m->log);
}
non_null()
static uint8_t *groups_save(const Messenger *m, uint8_t *data)
{
const GC_Session *c = m->group_handler;
const uint32_t num_groups = gc_count_groups(c);
if (num_groups == 0) {
return data;
}
const uint32_t len = m_plugin_size(m, STATE_TYPE_GROUPS);
if (len == 0) {
return data;
}
data = state_write_section_header(data, STATE_COOKIE_TYPE, len, STATE_TYPE_GROUPS);
if (!bin_pack_obj(pack_groupchats_handler, c, m->log, data, len)) {
LOGGER_FATAL(m->log, "failed to pack group chats into buffer of length %u", len);
return data;
}
data += len;
LOGGER_DEBUG(m->log, "Saved %u groups (length %u)", num_groups, len);
return data;
}
non_null()
static bool handle_groups_load(void *obj, Bin_Unpack *bu)
{
Messenger *m = (Messenger *)obj;
uint32_t num_groups;
if (!bin_unpack_array(bu, &num_groups)) {
LOGGER_ERROR(m->log, "msgpack failed to unpack groupchats array: expected array");
return false;
}
LOGGER_DEBUG(m->log, "Loading %u groups", num_groups);
for (uint32_t i = 0; i < num_groups; ++i) {
const int group_number = gc_group_load(m->group_handler, bu);
if (group_number < 0) {
LOGGER_WARNING(m->log, "Failed to load group %u", i);
// Can't recover trivially. We may need to skip over some data here.
break;
}
}
LOGGER_DEBUG(m->log, "Successfully loaded %u groups", gc_count_groups(m->group_handler));
return true;
}
non_null()
static State_Load_Status groups_load(Messenger *m, const uint8_t *data, uint32_t length)
{
if (!bin_unpack_obj(handle_groups_load, m, data, length)) {
LOGGER_ERROR(m->log, "msgpack failed to unpack groupchats array");
return STATE_LOAD_STATUS_ERROR;
}
return STATE_LOAD_STATUS_CONTINUE;
}
// name state plugin
non_null()
static uint32_t name_size(const Messenger *m)
{
return m->name_length;
}
non_null()
static uint8_t *save_name(const Messenger *m, uint8_t *data)
{
const uint32_t len = m_plugin_size(m, STATE_TYPE_NAME);
data = state_write_section_header(data, STATE_COOKIE_TYPE, len, STATE_TYPE_NAME);
memcpy(data, m->name, len);
data += len;
return data;
}
non_null()
static State_Load_Status load_name(Messenger *m, const uint8_t *data, uint32_t length)
{
if (length > 0 && length <= MAX_NAME_LENGTH) {
setname(m, data, length);
}
return STATE_LOAD_STATUS_CONTINUE;
}
// status message state plugin
non_null()
static uint32_t status_message_size(const Messenger *m)
{
return m->statusmessage_length;
}
non_null()
static uint8_t *save_status_message(const Messenger *m, uint8_t *data)
{
const uint32_t len = m_plugin_size(m, STATE_TYPE_STATUSMESSAGE);
data = state_write_section_header(data, STATE_COOKIE_TYPE, len, STATE_TYPE_STATUSMESSAGE);
memcpy(data, m->statusmessage, len);
data += len;
return data;
}
non_null()
static State_Load_Status load_status_message(Messenger *m, const uint8_t *data, uint32_t length)
{
if (length > 0 && length <= MAX_STATUSMESSAGE_LENGTH) {
m_set_statusmessage(m, data, length);
}
return STATE_LOAD_STATUS_CONTINUE;
}
// status state plugin
non_null()
static uint32_t status_size(const Messenger *m)
{
return 1;
}
non_null()
static uint8_t *save_status(const Messenger *m, uint8_t *data)
{
const uint32_t len = m_plugin_size(m, STATE_TYPE_STATUS);
data = state_write_section_header(data, STATE_COOKIE_TYPE, len, STATE_TYPE_STATUS);
*data = m->userstatus;
data += len;
return data;
}
non_null()
static State_Load_Status load_status(Messenger *m, const uint8_t *data, uint32_t length)
{
if (length == 1) {
m_set_userstatus(m, *data);
}
return STATE_LOAD_STATUS_CONTINUE;
}
// TCP Relay state plugin
non_null()
static uint32_t tcp_relay_size(const Messenger *m)
{
return NUM_SAVED_TCP_RELAYS * packed_node_size(net_family_tcp_ipv6());
}
non_null()
static uint8_t *save_tcp_relays(const Messenger *m, uint8_t *data)
{
Node_format relays[NUM_SAVED_TCP_RELAYS] = {{{0}}};
uint8_t *temp_data = data;
data = state_write_section_header(temp_data, STATE_COOKIE_TYPE, 0, STATE_TYPE_TCP_RELAY);
if (m->num_loaded_relays > 0) {
memcpy(relays, m->loaded_relays, sizeof(Node_format) * m->num_loaded_relays);
}
uint32_t num = m->num_loaded_relays;
num += copy_connected_tcp_relays(m->net_crypto, relays + num, NUM_SAVED_TCP_RELAYS - num);
const int l = pack_nodes(m->log, data, NUM_SAVED_TCP_RELAYS * packed_node_size(net_family_tcp_ipv6()), relays, num);
if (l > 0) {
const uint32_t len = l;
data = state_write_section_header(temp_data, STATE_COOKIE_TYPE, len, STATE_TYPE_TCP_RELAY);
data += len;
}
return data;
}
non_null()
static State_Load_Status load_tcp_relays(Messenger *m, const uint8_t *data, uint32_t length)
{
if (length > 0) {
const int num = unpack_nodes(m->loaded_relays, NUM_SAVED_TCP_RELAYS, nullptr, data, length, true);
if (num == -1) {
m->num_loaded_relays = 0;
return STATE_LOAD_STATUS_CONTINUE;
}
m->num_loaded_relays = num;
m->has_added_relays = false;
}
return STATE_LOAD_STATUS_CONTINUE;
}
// path node state plugin
non_null()
static uint32_t path_node_size(const Messenger *m)
{
return NUM_SAVED_PATH_NODES * packed_node_size(net_family_tcp_ipv6());
}
non_null()
static uint8_t *save_path_nodes(const Messenger *m, uint8_t *data)
{
Node_format nodes[NUM_SAVED_PATH_NODES] = {{{0}}};
uint8_t *temp_data = data;
data = state_write_section_header(data, STATE_COOKIE_TYPE, 0, STATE_TYPE_PATH_NODE);
const unsigned int num = onion_backup_nodes(m->onion_c, nodes, NUM_SAVED_PATH_NODES);
const int l = pack_nodes(m->log, data, NUM_SAVED_PATH_NODES * packed_node_size(net_family_tcp_ipv6()), nodes, num);
if (l > 0) {
const uint32_t len = l;
data = state_write_section_header(temp_data, STATE_COOKIE_TYPE, len, STATE_TYPE_PATH_NODE);
data += len;
}
return data;
}
non_null()
static State_Load_Status load_path_nodes(Messenger *m, const uint8_t *data, uint32_t length)
{
if (length > 0) {
Node_format nodes[NUM_SAVED_PATH_NODES];
const int num = unpack_nodes(nodes, NUM_SAVED_PATH_NODES, nullptr, data, length, false);
if (num == -1) {
return STATE_LOAD_STATUS_CONTINUE;
}
for (int i = 0; i < num; ++i) {
onion_add_bs_path_node(m->onion_c, &nodes[i].ip_port, nodes[i].public_key);
}
}
return STATE_LOAD_STATUS_CONTINUE;
}
non_null()
static void m_register_default_plugins(Messenger *m)
{
m_register_state_plugin(m, STATE_TYPE_NOSPAMKEYS, nospam_keys_size, load_nospam_keys, save_nospam_keys);
m_register_state_plugin(m, STATE_TYPE_DHT, m_dht_size, m_dht_load, save_dht);
m_register_state_plugin(m, STATE_TYPE_FRIENDS, saved_friendslist_size, friends_list_load, friends_list_save);
m_register_state_plugin(m, STATE_TYPE_NAME, name_size, load_name, save_name);
m_register_state_plugin(m, STATE_TYPE_STATUSMESSAGE, status_message_size, load_status_message,
save_status_message);
m_register_state_plugin(m, STATE_TYPE_STATUS, status_size, load_status, save_status);
if (m->options.groups_persistence_enabled) {
m_register_state_plugin(m, STATE_TYPE_GROUPS, saved_groups_size, groups_load, groups_save);
}
m_register_state_plugin(m, STATE_TYPE_TCP_RELAY, tcp_relay_size, load_tcp_relays, save_tcp_relays);
m_register_state_plugin(m, STATE_TYPE_PATH_NODE, path_node_size, load_path_nodes, save_path_nodes);
}
bool messenger_load_state_section(Messenger *m, const uint8_t *data, uint32_t length, uint16_t type,
State_Load_Status *status)
{
for (uint8_t i = 0; i < m->options.state_plugins_length; ++i) {
const Messenger_State_Plugin *const plugin = &m->options.state_plugins[i];
if (plugin->type == type) {
*status = plugin->load(m, data, length);
return true;
}
}
return false;
}
/** @brief 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 count_friendlist(const Messenger *m)
{
uint32_t ret = 0;
for (uint32_t i = 0; i < m->numfriends; ++i) {
if (m->friendlist[i].status > 0) {
++ret;
}
}
return ret;
}
/** @brief 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 copy_friendlist(Messenger const *m, uint32_t *out_list, uint32_t list_size)
{
if (out_list == nullptr) {
return 0;
}
if (m->numfriends == 0) {
return 0;
}
uint32_t ret = 0;
for (uint32_t i = 0; i < m->numfriends; ++i) {
if (ret >= list_size) {
break; /* Abandon ship */
}
if (m->friendlist[i].status > 0) {
out_list[ret] = i;
++ret;
}
}
return ret;
}
static fr_friend_request_cb m_handle_friend_request;
non_null(1, 2, 3) nullable(5)
static void m_handle_friend_request(
void *object, const uint8_t *public_key, const uint8_t *message, size_t length, void *user_data)
{
Messenger *m = (Messenger *)object;
assert(m != nullptr);
m->friend_request(m, public_key, message, length, user_data);
}
/** @brief Run this at startup.
*
* @return allocated instance of Messenger on success.
* @retval 0 if there are problems.
*
* if error is not NULL it will be set to one of the values in the enum above.
*/
Messenger *new_messenger(Mono_Time *mono_time, const Memory *mem, const Random *rng, const Network *ns,
Messenger_Options *options, Messenger_Error *error)
{
if (options == nullptr) {
return nullptr;
}
if (error != nullptr) {
*error = MESSENGER_ERROR_OTHER;
}
Messenger *m = (Messenger *)mem_alloc(mem, sizeof(Messenger));
if (m == nullptr) {
return nullptr;
}
m->mono_time = mono_time;
m->mem = mem;
m->rng = rng;
m->ns = ns;
m->fr = friendreq_new();
if (m->fr == nullptr) {
mem_delete(mem, m);
return nullptr;
}
m->log = logger_new();
if (m->log == nullptr) {
friendreq_kill(m->fr);
mem_delete(mem, m);
return nullptr;
}
logger_callback_log(m->log, options->log_callback, options->log_context, options->log_user_data);
unsigned int net_err = 0;
if (!options->udp_disabled && options->proxy_info.proxy_type != TCP_PROXY_NONE) {
// We don't currently support UDP over proxy.
LOGGER_INFO(m->log, "UDP enabled and proxy set: disabling UDP");
options->udp_disabled = true;
}
if (options->udp_disabled) {
m->net = new_networking_no_udp(m->log, m->mem, m->ns);
} else {
IP ip;
ip_init(&ip, options->ipv6enabled);
m->net = new_networking_ex(m->log, m->mem, m->ns, &ip, options->port_range[0], options->port_range[1], &net_err);
}
if (m->net == nullptr) {
friendreq_kill(m->fr);
if (error != nullptr && net_err == 1) {
LOGGER_WARNING(m->log, "network initialisation failed (no ports available)");
*error = MESSENGER_ERROR_PORT;
}
logger_kill(m->log);
mem_delete(mem, m);
return nullptr;
}
m->dht = new_dht(m->log, m->mem, m->rng, m->ns, m->mono_time, m->net, options->hole_punching_enabled, options->local_discovery_enabled);
if (m->dht == nullptr) {
kill_networking(m->net);
friendreq_kill(m->fr);
logger_kill(m->log);
mem_delete(mem, m);
return nullptr;
}
m->net_crypto = new_net_crypto(m->log, m->mem, m->rng, m->ns, m->mono_time, m->dht, &options->proxy_info);
if (m->net_crypto == nullptr) {
LOGGER_WARNING(m->log, "net_crypto initialisation failed");
kill_dht(m->dht);
kill_networking(m->net);
friendreq_kill(m->fr);
logger_kill(m->log);
mem_delete(mem, m);
return nullptr;
}
m->group_announce = new_gca_list();
if (m->group_announce == nullptr) {
LOGGER_WARNING(m->log, "DHT group chats initialisation failed");
kill_net_crypto(m->net_crypto);
kill_dht(m->dht);
kill_networking(m->net);
friendreq_kill(m->fr);
logger_kill(m->log);
mem_delete(mem, m);
return nullptr;
}
if (options->dht_announcements_enabled) {
m->forwarding = new_forwarding(m->log, m->rng, m->mono_time, m->dht);
if (m->forwarding != nullptr) {
m->announce = new_announcements(m->log, m->mem, m->rng, m->mono_time, m->forwarding);
} else {
m->announce = nullptr;
}
} else {
m->forwarding = nullptr;
m->announce = nullptr;
}
m->onion = new_onion(m->log, m->mem, m->mono_time, m->rng, m->dht);
m->onion_a = new_onion_announce(m->log, m->mem, m->rng, m->mono_time, m->dht);
m->onion_c = new_onion_client(m->log, m->mem, m->rng, m->mono_time, m->net_crypto);
if (m->onion_c != nullptr) {
m->fr_c = new_friend_connections(m->log, m->mono_time, m->ns, m->onion_c, options->local_discovery_enabled);
}
if ((options->dht_announcements_enabled && (m->forwarding == nullptr || m->announce == nullptr)) ||
m->onion == nullptr || m->onion_a == nullptr || m->onion_c == nullptr || m->fr_c == nullptr) {
LOGGER_WARNING(m->log, "onion initialisation failed");
kill_onion(m->onion);
kill_onion_announce(m->onion_a);
kill_onion_client(m->onion_c);
kill_gca(m->group_announce);
kill_friend_connections(m->fr_c);
kill_announcements(m->announce);
kill_forwarding(m->forwarding);
kill_net_crypto(m->net_crypto);
kill_dht(m->dht);
kill_networking(m->net);
friendreq_kill(m->fr);
logger_kill(m->log);
mem_delete(mem, m);
return nullptr;
}
gca_onion_init(m->group_announce, m->onion_a);
m->group_handler = new_dht_groupchats(m);
if (m->group_handler == nullptr) {
LOGGER_WARNING(m->log, "conferences initialisation failed");
kill_onion(m->onion);
kill_onion_announce(m->onion_a);
kill_onion_client(m->onion_c);
kill_gca(m->group_announce);
kill_friend_connections(m->fr_c);
kill_announcements(m->announce);
kill_forwarding(m->forwarding);
kill_net_crypto(m->net_crypto);
kill_dht(m->dht);
kill_networking(m->net);
friendreq_kill(m->fr);
logger_kill(m->log);
mem_delete(mem, m);
return nullptr;
}
if (options->tcp_server_port != 0) {
m->tcp_server = new_tcp_server(m->log, m->mem, m->rng, m->ns, options->ipv6enabled, 1,
&options->tcp_server_port, dht_get_self_secret_key(m->dht),
m->onion, m->forwarding);
if (m->tcp_server == nullptr) {
LOGGER_WARNING(m->log, "TCP server initialisation failed");
kill_onion(m->onion);
kill_onion_announce(m->onion_a);
kill_dht_groupchats(m->group_handler);
kill_friend_connections(m->fr_c);
kill_onion_client(m->onion_c);
kill_gca(m->group_announce);
kill_announcements(m->announce);
kill_forwarding(m->forwarding);
kill_net_crypto(m->net_crypto);
kill_dht(m->dht);
kill_networking(m->net);
friendreq_kill(m->fr);
logger_kill(m->log);
mem_delete(mem, m);
if (error != nullptr) {
*error = MESSENGER_ERROR_TCP_SERVER;
}
return nullptr;
}
}
m->options = *options;
friendreq_init(m->fr, m->fr_c);
set_nospam(m->fr, random_u32(m->rng));
set_filter_function(m->fr, &friend_already_added, m);
m->lastdump = 0;
m->is_receiving_file = 0;
m_register_default_plugins(m);
callback_friendrequest(m->fr, m_handle_friend_request, m);
if (error != nullptr) {
*error = MESSENGER_ERROR_NONE;
}
return m;
}
/** @brief Run this before closing shop.
*
* Free all datastructures.
*/
void kill_messenger(Messenger *m)
{
if (m == nullptr) {
return;
}
if (m->tcp_server != nullptr) {
kill_tcp_server(m->tcp_server);
}
kill_onion(m->onion);
kill_onion_announce(m->onion_a);
kill_dht_groupchats(m->group_handler);
kill_friend_connections(m->fr_c);
kill_onion_client(m->onion_c);
kill_gca(m->group_announce);
kill_announcements(m->announce);
kill_forwarding(m->forwarding);
kill_net_crypto(m->net_crypto);
kill_dht(m->dht);
kill_networking(m->net);
for (uint32_t i = 0; i < m->numfriends; ++i) {
clear_receipts(m, i);
}
mem_delete(m->mem, m->friendlist);
friendreq_kill(m->fr);
mem_delete(m->mem, m->options.state_plugins);
logger_kill(m->log);
mem_delete(m->mem, m);
}
bool m_is_receiving_file(Messenger *m)
{
// Only run the expensive loop below once every 64 tox_iterate calls.
const uint8_t skip_count = 64;
if (m->is_receiving_file != 0) {
--m->is_receiving_file;
return true;
}
// TODO(iphydf): This is a very expensive loop. Consider keeping track of
// the number of live file transfers.
for (size_t friend_number = 0; friend_number < m->numfriends; ++friend_number) {
for (size_t i = 0; i < MAX_CONCURRENT_FILE_PIPES; ++i) {
if (m->friendlist[friend_number].file_receiving[i].status == FILESTATUS_TRANSFERRING) {
m->is_receiving_file = skip_count;
return true;
}
}
}
return false;
}
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