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/*
Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Her Majesty the Queen in
Right of Canada (Communications Research Center Canada)
Copyright (C) 2016
Matthias P. Braendli, matthias.braendli@mpb.li
http://www.opendigitalradio.org
UDP output
*/
/*
This file is part of ODR-DabMux.
ODR-DabMux 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 of the
License, or (at your option) any later version.
ODR-DabMux 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 ODR-DabMux. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#if defined(HAVE_OUTPUT_UDP)
#include <cstring>
#include <cstdlib>
#include <regex>
#include <string>
#include <cstdio>
#include <limits.h>
#include "dabOutput.h"
#include "Socket.h"
DabOutputUdp::DabOutputUdp() :
socket_(),
packet_(6144)
{ }
int DabOutputUdp::Open(const char* name)
{
using namespace std;
const string uri_without_proto(name);
regex re_url("([^:]+):([0-9]+)(.*)");
regex re_query("[?](?:src=([^&,]+))(?:[&,]ttl=([0-9]+))?");
smatch what;
if (regex_match(uri_without_proto, what, re_url,
regex_constants::match_default)) {
string address = what[1];
string port_str = what[2];
long port = std::strtol(port_str.c_str(), nullptr, 0);
if ((port <= 0) || (port >= 65536)) {
etiLog.level(error) <<
"can't convert port number in UDP address " << uri_without_proto;
return -1;
}
packet_.address.resolveUdpDestination(address, port);
string query_params = what[3];
smatch query_what;
if (regex_match(query_params, query_what, re_query,
regex_constants::match_default)) {
string src = query_what[1];
try {
socket_.setMulticastSource(src.c_str());
string ttl_str = query_what[2];
if (not ttl_str.empty()) {
long ttl = std::strtol(ttl_str.c_str(), nullptr, 0);
if ((ttl <= 0) || (ttl >= 255)) {
etiLog.level(error) << "Invalid TTL setting in " <<
uri_without_proto;
return -1;
}
socket_.setMulticastTTL(ttl);
}
}
catch (const std::runtime_error& e) {
etiLog.level(error) << "Failed to set UDP output settings" << e.what();
}
}
else if (not query_params.empty()) {
etiLog.level(error) << "UDP output: could not parse parameters " <<
query_params;
return -1;
}
}
else {
etiLog.level(error) << uri_without_proto <<
" is an invalid format for UDP address: "
"expected ADDRESS:PORT[?src=SOURCE&ttl=TTL]";
return -1;
}
return 0;
}
int DabOutputUdp::Write(void* buffer, int size)
{
const uint8_t *buf = reinterpret_cast<uint8_t*>(buffer);
packet_.buffer.resize(0);
std::copy(buf, buf + size, std::back_inserter(packet_.buffer));
socket_.send(packet_);
return 0;
}
#endif // defined(HAVE_OUTPUT_UDP)
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