/** \brief send the bt_utmsgtype_t::HANDSHAKE
*/
bt_err_t bt_swarm_full_utmsg_t::send_handshake() throw()
{
// build the payload for the bt_utmsgtype_t::HANDSHAKE
pkt_t payload;
payload << bt_utmsgtype_t(bt_utmsgtype_t::HANDSHAKE);
payload.append(generate_handshake());
// build the bt_cmd_t to send
bt_cmd_t bt_cmd = bt_cmd_t::build_utmsg_payl(payload.to_datum(datum_t::NOCOPY));
// send it thru the bt_swarm_full_t
swarm_full->send_cmd( bt_cmd );
// return no error
return bt_err_t::OK;
}
void connection::write_handshake(const boost::system::error_code& error)
{
if (error) {
stillborn();
return;
}
boost::asio::async_write(link_.socket,
const_buffers_1(generate_handshake()),
boost::bind(&connection::read_handshake,
shared_from_this(),
placeholders::error,
placeholders::bytes_transferred));
}
/* Run the TCP connection
*/
void do_TCP_connection(TCP_Client_Connection *TCP_connection, void *userdata)
{
unix_time_update();
if (TCP_connection->status == TCP_CLIENT_DISCONNECTED) {
return;
}
if (TCP_connection->status == TCP_CLIENT_PROXY_HTTP_CONNECTING) {
if (send_pending_data(TCP_connection) == 0) {
int ret = proxy_http_read_connection_response(TCP_connection);
if (ret == -1) {
TCP_connection->kill_at = 0;
TCP_connection->status = TCP_CLIENT_DISCONNECTED;
}
if (ret == 1) {
generate_handshake(TCP_connection);
TCP_connection->status = TCP_CLIENT_CONNECTING;
}
}
}
if (TCP_connection->status == TCP_CLIENT_PROXY_SOCKS5_CONNECTING) {
if (send_pending_data(TCP_connection) == 0) {
int ret = socks5_read_handshake_response(TCP_connection);
if (ret == -1) {
TCP_connection->kill_at = 0;
TCP_connection->status = TCP_CLIENT_DISCONNECTED;
}
if (ret == 1) {
proxy_socks5_generate_connection_request(TCP_connection);
TCP_connection->status = TCP_CLIENT_PROXY_SOCKS5_UNCONFIRMED;
}
}
}
if (TCP_connection->status == TCP_CLIENT_PROXY_SOCKS5_UNCONFIRMED) {
if (send_pending_data(TCP_connection) == 0) {
int ret = proxy_socks5_read_connection_response(TCP_connection);
if (ret == -1) {
TCP_connection->kill_at = 0;
TCP_connection->status = TCP_CLIENT_DISCONNECTED;
}
if (ret == 1) {
generate_handshake(TCP_connection);
TCP_connection->status = TCP_CLIENT_CONNECTING;
}
}
}
if (TCP_connection->status == TCP_CLIENT_CONNECTING) {
if (send_pending_data(TCP_connection) == 0) {
TCP_connection->status = TCP_CLIENT_UNCONFIRMED;
}
}
if (TCP_connection->status == TCP_CLIENT_UNCONFIRMED) {
uint8_t data[TCP_SERVER_HANDSHAKE_SIZE];
int len = read_TCP_packet(TCP_connection->sock, data, sizeof(data));
if (sizeof(data) == len) {
if (handle_handshake(TCP_connection, data) == 0) {
TCP_connection->kill_at = ~0;
TCP_connection->status = TCP_CLIENT_CONFIRMED;
} else {
TCP_connection->kill_at = 0;
TCP_connection->status = TCP_CLIENT_DISCONNECTED;
}
}
}
if (TCP_connection->status == TCP_CLIENT_CONFIRMED) {
do_confirmed_TCP(TCP_connection, userdata);
}
if (TCP_connection->kill_at <= unix_time()) {
TCP_connection->status = TCP_CLIENT_DISCONNECTED;
}
}
/* Create new TCP connection to ip_port/public_key
*/
TCP_Client_Connection *new_TCP_connection(IP_Port ip_port, const uint8_t *public_key, const uint8_t *self_public_key,
const uint8_t *self_secret_key, TCP_Proxy_Info *proxy_info)
{
if (networking_at_startup() != 0) {
return NULL;
}
if (ip_port.ip.family != AF_INET && ip_port.ip.family != AF_INET6) {
return NULL;
}
uint8_t family = ip_port.ip.family;
TCP_Proxy_Info default_proxyinfo;
if (proxy_info == NULL) {
default_proxyinfo.proxy_type = TCP_PROXY_NONE;
proxy_info = &default_proxyinfo;
}
if (proxy_info->proxy_type != TCP_PROXY_NONE) {
family = proxy_info->ip_port.ip.family;
}
Socket sock = net_socket(family, TOX_SOCK_STREAM, TOX_PROTO_TCP);
if (!sock_valid(sock)) {
return NULL;
}
if (!set_socket_nosigpipe(sock)) {
kill_sock(sock);
return 0;
}
if (!(set_socket_nonblock(sock) && connect_sock_to(sock, ip_port, proxy_info))) {
kill_sock(sock);
return NULL;
}
TCP_Client_Connection *temp = (TCP_Client_Connection *)calloc(sizeof(TCP_Client_Connection), 1);
if (temp == NULL) {
kill_sock(sock);
return NULL;
}
temp->sock = sock;
memcpy(temp->public_key, public_key, CRYPTO_PUBLIC_KEY_SIZE);
memcpy(temp->self_public_key, self_public_key, CRYPTO_PUBLIC_KEY_SIZE);
encrypt_precompute(temp->public_key, self_secret_key, temp->shared_key);
temp->ip_port = ip_port;
temp->proxy_info = *proxy_info;
switch (proxy_info->proxy_type) {
case TCP_PROXY_HTTP:
temp->status = TCP_CLIENT_PROXY_HTTP_CONNECTING;
proxy_http_generate_connection_request(temp);
break;
case TCP_PROXY_SOCKS5:
temp->status = TCP_CLIENT_PROXY_SOCKS5_CONNECTING;
proxy_socks5_generate_handshake(temp);
break;
case TCP_PROXY_NONE:
temp->status = TCP_CLIENT_CONNECTING;
if (generate_handshake(temp) == -1) {
kill_sock(sock);
free(temp);
return NULL;
}
break;
}
temp->kill_at = unix_time() + TCP_CONNECTION_TIMEOUT;
return temp;
}
