/* -*- c++ -*- */
/*
* Copyright 2013 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "socket_pdu_impl.h"
#include "tcp_connection.h"
#include <gnuradio/io_signature.h>
#include <gnuradio/blocks/pdu.h>
namespace gr {
namespace blocks {
socket_pdu::sptr
socket_pdu::make(std::string type, std::string addr, std::string port, int MTU/*= 10000*/, bool tcp_no_delay/*= false*/)
{
return gnuradio::get_initial_sptr(new socket_pdu_impl(type, addr, port, MTU, tcp_no_delay));
}
socket_pdu_impl::socket_pdu_impl(std::string type, std::string addr, std::string port, int MTU/*= 10000*/, bool tcp_no_delay/*= false*/)
: block("socket_pdu",
io_signature::make (0, 0, 0),
io_signature::make (0, 0, 0)),
d_tcp_no_delay(tcp_no_delay)
{
d_rxbuf.resize(MTU);
message_port_register_in(PDU_PORT_ID);
message_port_register_out(PDU_PORT_ID);
if ((type == "TCP_SERVER") && ((addr.empty()) || (addr == "0.0.0.0"))) { // Bind on all interfaces
int port_num = atoi(port.c_str());
if (port_num == 0)
throw std::invalid_argument("gr::blocks:socket_pdu: invalid port for TCP_SERVER");
d_tcp_endpoint = boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), port_num);
}
else if ((type == "TCP_SERVER") || (type == "TCP_CLIENT")) {
boost::asio::ip::tcp::resolver resolver(d_io_service);
boost::asio::ip::tcp::resolver::query query(boost::asio::ip::tcp::v4(),
addr, port,
boost::asio::ip::resolver_query_base::passive);
d_tcp_endpoint = *resolver.resolve(query);
}
else if ((type == "UDP_SERVER") && ((addr.empty()) || (addr == "0.0.0.0"))) { // Bind on all interfaces
int port_num = atoi(port.c_str());
if (port_num == 0)
throw std::invalid_argument("gr::blocks:socket_pdu: invalid port for UDP_SERVER");
d_udp_endpoint = boost::asio::ip::udp::endpoint(boost::asio::ip::udp::v4(), port_num);
}
else if ((type == "UDP_SERVER") || (type == "UDP_CLIENT")) {
boost::asio::ip::udp::resolver resolver(d_io_service);
boost::asio::ip::udp::resolver::query query(boost::asio::ip::udp::v4(),
addr, port,
boost::asio::ip::resolver_query_base::passive);
if (type == "UDP_SERVER")
d_udp_endpoint = *resolver.resolve(query);
else
d_udp_endpoint_other = *resolver.resolve(query);
}
if (type == "TCP_SERVER") {
d_acceptor_tcp.reset(new boost::asio::ip::tcp::acceptor(d_io_service, d_tcp_endpoint));
d_acceptor_tcp->set_option(boost::asio::ip::tcp::acceptor::reuse_address(true));
start_tcp_accept();
set_msg_handler(PDU_PORT_ID, boost::bind(&socket_pdu_impl::tcp_server_send, this, _1));
}
else if (type =="TCP_CLIENT") {
boost::system::error_code error = boost::asio::error::host_not_found;
d_tcp_socket.reset(new boost::asio::ip::tcp::socket(d_io_service));
d_tcp_socket->connect(d_tcp_endpoint, error);
if (error)
throw boost::system::system_error(error);
d_tcp_socket->set_option(boost::asio::ip::tcp::no_delay(d_tcp_no_delay));
set_msg_handler(PDU_PORT_ID, boost::bind(&socket_pdu_impl::tcp_client_send, this, _1));
d_tcp_socket->async_read_some(boost::asio::buffer(d_rxbuf),
boost::bind(&socket_pdu_impl::handle_tcp_read, this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
}
else if (type =="UDP_SERVER") {
d_udp_socket.reset(new boost::asio::ip::udp::socket(d_io_service, d_udp_endpoint));
d_udp_socket->async_receive_from(boost::asio::buffer(d_rxbuf), d_udp_endpoint_other,
boost::bind(&socket_pdu_impl::handle_udp_read, this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
set_msg_handler(PDU_PORT_ID, boost::bind(&socket_pdu_impl::udp_send, this, _1));
}
else if (type =="UDP_CLIENT") {
d_udp_socket.reset(new boost::asio::ip::udp::socket(d_io_service, d_udp_endpoint));
d_udp_socket->async_receive_from(boost::asio::buffer(d_rxbuf), d_udp_endpoint_other,
boost::bind(&socket_pdu_impl::handle_udp_read, this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
set_msg_handler(PDU_PORT_ID, boost::bind(&socket_pdu_impl::udp_send, this, _1));
}
else
throw std::runtime_error("gr::blocks:socket_pdu: unknown socket type");
d_thread = gr::thread::thread(boost::bind(&socket_pdu_impl::run_io_service, this));
d_started = true;
}
socket_pdu_impl::~socket_pdu_impl()
{
stop();
}
bool
socket_pdu_impl::stop()
{
if (d_started) {
d_io_service.stop();
d_thread.interrupt();
d_thread.join();
}
d_started = false;
return true;
}
void
socket_pdu_impl::handle_tcp_read(const boost::system::error_code& error, size_t bytes_transferred)
{
if (!error) {
pmt::pmt_t vector = pmt::init_u8vector(bytes_transferred, (const uint8_t *)&d_rxbuf[0]);
pmt::pmt_t pdu = pmt::cons(pmt::PMT_NIL, vector);
message_port_pub(PDU_PORT_ID, pdu);
d_tcp_socket->async_read_some(boost::asio::buffer(d_rxbuf),
boost::bind(&socket_pdu_impl::handle_tcp_read, this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
}
else
throw boost::system::system_error(error);
}
void
socket_pdu_impl::start_tcp_accept()
{
tcp_connection::sptr new_connection = tcp_connection::make(d_acceptor_tcp->get_io_service(), d_rxbuf.size(), d_tcp_no_delay);
d_acceptor_tcp->async_accept(new_connection->socket(),
boost::bind(&socket_pdu_impl::handle_tcp_accept, this,
new_connection, boost::asio::placeholders::error));
}
void
socket_pdu_impl::tcp_server_send(pmt::pmt_t msg)
{
pmt::pmt_t vector = pmt::cdr(msg);
for(size_t i = 0; i < d_tcp_connections.size(); i++)
d_tcp_connections[i]->send(vector);
}
void
socket_pdu_impl::handle_tcp_accept(tcp_connection::sptr new_connection, const boost::system::error_code& error)
{
if (!error) {
new_connection->start(this);
d_tcp_connections.push_back(new_connection);
start_tcp_accept();
}
else
std::cout << error << std::endl;
}
void
socket_pdu_impl::tcp_client_send(pmt::pmt_t msg)
{
pmt::pmt_t vector = pmt::cdr(msg);
size_t len = pmt::blob_length(vector);
size_t offset = 0;
std::vector<char> txbuf(std::min(len, d_rxbuf.size()));
while (offset < len) {
size_t send_len = std::min((len - offset), txbuf.size());
memcpy(&txbuf[0], pmt::uniform_vector_elements(vector, offset), send_len);
offset += send_len;
d_tcp_socket->send(boost::asio::buffer(txbuf, send_len));
}
}
void
socket_pdu_impl::udp_send(pmt::pmt_t msg)
{
if (d_udp_endpoint_other.address().to_string() == "0.0.0.0")
return;
pmt::pmt_t vector = pmt::cdr(msg);
size_t len = pmt::blob_length(vector);
size_t offset = 0;
std::vector<char> txbuf(std::min(len, d_rxbuf.size()));
while (offset < len) {
size_t send_len = std::min((len - offset), txbuf.size());
memcpy(&txbuf[0], pmt::uniform_vector_elements(vector, offset), send_len);
offset += send_len;
d_udp_socket->send_to(boost::asio::buffer(txbuf, send_len), d_udp_endpoint_other);
}
}
void
socket_pdu_impl::handle_udp_read(const boost::system::error_code& error, size_t bytes_transferred)
{
if (!error) {
pmt::pmt_t vector = pmt::init_u8vector(bytes_transferred, (const uint8_t*)&d_rxbuf[0]);
pmt::pmt_t pdu = pmt::cons(pmt::PMT_NIL, vector);
message_port_pub(PDU_PORT_ID, pdu);
d_udp_socket->async_receive_from(boost::asio::buffer(d_rxbuf), d_udp_endpoint_other,
boost::bind(&socket_pdu_impl::handle_udp_read, this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
}
}
} /* namespace blocks */
}/* namespace gr */