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//
// Copyright 2010 Ettus Research LLC
//
// This program 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.
//
// This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
//
#include <uhd/usrp/mboard/usrp2.hpp>
#include <uhd/device.hpp>
#include <uhd/transport/udp.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/format.hpp>
#include <boost/thread.hpp>
#include <netinet/in.h>
#include "usrp2/impl_base.hpp"
using namespace uhd::usrp::mboard;
/***********************************************************************
* Discovery over the udp transport
**********************************************************************/
uhd::device_addrs_t usrp2::discover(const device_addr_t &hint){
device_addrs_t usrp2_addrs;
//create a udp transport to communicate
//TODO if an addr is not provided, search all interfaces?
std::string ctrl_port = boost::lexical_cast<std::string>(USRP2_UDP_CTRL_PORT);
uhd::transport::udp udp_transport(hint["addr"], ctrl_port, true);
//send a hello control packet
usrp2_ctrl_data_t ctrl_data_out;
ctrl_data_out.id = htonl(USRP2_CTRL_ID_GIVE_ME_YOUR_IP_ADDR_BRO);
udp_transport.send(boost::asio::buffer(&ctrl_data_out, sizeof(ctrl_data_out)));
//loop and recieve until the time is up
size_t num_timeouts = 0;
while(true){
uhd::shared_iovec iov = udp_transport.recv();
//std::cout << boost::asio::buffer_size(buff) << "\n";
if (iov.len < sizeof(usrp2_ctrl_data_t)){
//sleep a little so we dont burn cpu
if (num_timeouts++ > 50) break;
boost::this_thread::sleep(boost::posix_time::milliseconds(1));
}else{
//handle the received data
const usrp2_ctrl_data_t *ctrl_data_in = reinterpret_cast<const usrp2_ctrl_data_t *>(iov.base);
switch(ntohl(ctrl_data_in->id)){
case USRP2_CTRL_ID_THIS_IS_MY_IP_ADDR_DUDE:
//make a boost asio ipv4 with the raw addr in host byte order
boost::asio::ip::address_v4 ip_addr(ntohl(ctrl_data_in->data.ip_addr));
device_addr_t new_addr;
new_addr["name"] = "USRP2";
new_addr["type"] = "udp";
new_addr["addr"] = ip_addr.to_string();
usrp2_addrs.push_back(new_addr);
break;
}
}
}
return usrp2_addrs;
}
/***********************************************************************
* Structors
**********************************************************************/
usrp2::usrp2(const device_addr_t &device_addr){
//create a control transport
uhd::transport::udp::sptr ctrl_transport(
new uhd::transport::udp(
device_addr["addr"],
boost::lexical_cast<std::string>(USRP2_UDP_CTRL_PORT)
)
);
//create a data transport
uhd::transport::udp::sptr data_transport(
new uhd::transport::udp(
device_addr["addr"],
boost::lexical_cast<std::string>(USRP2_UDP_DATA_PORT)
)
);
//create the usrp2 implementation guts
_impl = impl_base::sptr(
new impl_base(ctrl_transport, data_transport)
);
}
usrp2::~usrp2(void){
/* NOP */
}
/***********************************************************************
* Get Properties
**********************************************************************/
void usrp2::get(const wax::obj &key, wax::obj &val){
return wax::cast<impl_base::sptr>(_impl)->get(key, val);
}
/***********************************************************************
* Set Properties
**********************************************************************/
void usrp2::set(const wax::obj &key, const wax::obj &val){
return wax::cast<impl_base::sptr>(_impl)->set(key, val);
}
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