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/* -*- 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 "tcp_connection.h"
#include <gnuradio/basic_block.h>
#include <gnuradio/blocks/pdu.h>
namespace gr {
namespace blocks {
tcp_connection::sptr tcp_connection::make(boost::asio::io_service& io_service, int MTU/*= 10000*/, bool no_delay/*=false*/)
{
return sptr(new tcp_connection(io_service, MTU, no_delay));
}
tcp_connection::tcp_connection(boost::asio::io_service& io_service, int MTU/*= 10000*/, bool no_delay/*=false*/)
: d_socket(io_service)
, d_block(NULL)
, d_no_delay(no_delay)
{
d_buf.resize(MTU);
try {
d_socket.set_option(boost::asio::ip::tcp::no_delay(no_delay));
}
catch (...) {
// Silently ignore failure (socket might be current in accept stage) and try again in 'start'
}
}
void
tcp_connection::send(pmt::pmt_t vector)
{
size_t len = pmt::blob_length(vector);
size_t offset = 0;
std::vector<char> txbuf(std::min(len, d_buf.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;
boost::asio::async_write(d_socket, boost::asio::buffer(txbuf, send_len),
boost::bind(&tcp_connection::handle_write, this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
}
}
void
tcp_connection::start(gr::basic_block *block)
{
d_block = block;
d_socket.set_option(boost::asio::ip::tcp::no_delay(d_no_delay));
d_socket.async_read_some(boost::asio::buffer(d_buf),
boost::bind(&tcp_connection::handle_read, this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
}
void
tcp_connection::handle_read(const boost::system::error_code& error, size_t bytes_transferred)
{
if (!error) {
if (d_block) {
pmt::pmt_t vector = pmt::init_u8vector(bytes_transferred, (const uint8_t*)&d_buf[0]);
pmt::pmt_t pdu = pmt::cons(pmt::PMT_NIL, vector);
d_block->message_port_pub(PDU_PORT_ID, pdu);
}
d_socket.async_read_some(boost::asio::buffer(d_buf),
boost::bind(&tcp_connection::handle_read, this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
}
}
} /* namespace blocks */
}/* namespace gr */
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