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/* -*- c++ -*- */
/*
* Copyright 2007-2010,2013 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "udp_sink_impl.h"
#include <gnuradio/io_signature.h>
#include <gnuradio/thread/thread.h>
#include <stdio.h>
#include <string.h>
#include <boost/array.hpp>
#include <boost/asio.hpp>
#include <boost/format.hpp>
#include <memory>
#include <stdexcept>
namespace gr {
namespace blocks {
udp_sink::sptr udp_sink::make(
size_t itemsize, const std::string& host, int port, int payload_size, bool eof)
{
return gnuradio::make_block_sptr<udp_sink_impl>(
itemsize, host, port, payload_size, eof);
}
udp_sink_impl::udp_sink_impl(
size_t itemsize, const std::string& host, int port, int payload_size, bool eof)
: sync_block(
"udp_sink", io_signature::make(1, 1, itemsize), io_signature::make(0, 0, 0)),
d_itemsize(itemsize),
d_payload_size(payload_size),
d_eof(eof),
d_connected(false)
{
// Get the destination address
connect(host, port);
}
// public constructor that returns a shared_ptr
udp_sink_impl::~udp_sink_impl()
{
if (d_connected)
disconnect();
}
void udp_sink_impl::connect(const std::string& host, int port)
{
if (d_connected)
disconnect();
std::string s_port = (boost::format("%d") % port).str();
if (!host.empty()) {
boost::asio::ip::udp::resolver resolver(d_io_service);
boost::asio::ip::udp::resolver::query query(
host, s_port, boost::asio::ip::resolver_query_base::passive);
d_endpoint = *resolver.resolve(query);
d_socket = std::make_unique<boost::asio::ip::udp::socket>(d_io_service);
d_socket->open(d_endpoint.protocol());
boost::asio::socket_base::reuse_address roption(true);
d_socket->set_option(roption);
d_connected = true;
}
}
void udp_sink_impl::disconnect()
{
if (!d_connected)
return;
gr::thread::scoped_lock guard(d_mutex); // protect d_socket from work()
// Send a few zero-length packets to signal receiver we are done
boost::array<char, 0> send_buf;
if (d_eof) {
int i;
for (i = 0; i < 3; i++)
d_socket->send_to(boost::asio::buffer(send_buf), d_endpoint);
}
d_socket->close();
d_socket.reset();
d_connected = false;
}
int udp_sink_impl::work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items)
{
const char* in = (const char*)input_items[0];
ssize_t r = 0, bytes_sent = 0, bytes_to_send = 0;
ssize_t total_size = noutput_items * d_itemsize;
gr::thread::scoped_lock guard(d_mutex); // protect d_socket
while (bytes_sent < total_size) {
bytes_to_send = std::min((ssize_t)d_payload_size, (total_size - bytes_sent));
if (d_connected) {
try {
r = d_socket->send_to(
boost::asio::buffer((void*)(in + bytes_sent), bytes_to_send),
d_endpoint);
} catch (std::exception& e) {
GR_LOG_ERROR(d_logger, boost::format("send error: %s") % e.what());
return -1;
}
} else
r = bytes_to_send; // discarded for lack of connection
bytes_sent += r;
}
return noutput_items;
}
} /* namespace blocks */
} /* namespace gr */
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