1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
//
// Copyright 2010-2012 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/utils/thread_priority.hpp>
#include <uhd/utils/safe_main.hpp>
#include <boost/program_options.hpp>
#include <boost/thread/thread.hpp>
#include <boost/format.hpp>
#include <boost/asio.hpp>
#include <iostream>
#include <csignal>
#include <vector>
#include <cstdlib>
namespace po = boost::program_options;
namespace asio = boost::asio;
typedef boost::shared_ptr<asio::ip::udp::socket> socket_type;
static const size_t insane_mtu = 9000;
boost::mutex spawn_mutex;
#if defined(UHD_PLATFORM_MACOS)
//limit buffer resize on macos or it will error
const size_t rx_dsp_buff_size = size_t(1e6);
#else
//set to half-a-second of buffering at max rate
const size_t rx_dsp_buff_size = size_t(50e6);
#endif
const size_t tx_dsp_buff_size = (1 << 20);
/***********************************************************************
* Signal handlers
**********************************************************************/
static bool stop_signal_called = false;
void sig_int_handler(int){stop_signal_called = true;}
static bool wait_for_recv_ready(int sock_fd){
//setup timeval for timeout
timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 100000; //100ms
//setup rset for timeout
fd_set rset;
FD_ZERO(&rset);
FD_SET(sock_fd, &rset);
//call select with timeout on receive socket
return ::select(sock_fd+1, &rset, NULL, NULL, &tv) > 0;
}
/***********************************************************************
* Relay class
**********************************************************************/
class udp_relay_type{
public:
udp_relay_type(
const std::string &server_addr,
const std::string &client_addr,
const std::string &port,
const size_t server_rx_size = 0,
const size_t server_tx_size = 0,
const size_t client_rx_size = 0,
const size_t client_tx_size = 0
):_port(port){
{
asio::ip::udp::resolver resolver(_io_service);
asio::ip::udp::resolver::query query(asio::ip::udp::v4(), server_addr, port);
asio::ip::udp::endpoint endpoint = *resolver.resolve(query);
_server_socket = boost::shared_ptr<asio::ip::udp::socket>(new asio::ip::udp::socket(_io_service, endpoint));
resize_buffs(_server_socket, server_rx_size, server_tx_size);
}
{
asio::ip::udp::resolver resolver(_io_service);
asio::ip::udp::resolver::query query(asio::ip::udp::v4(), client_addr, port);
asio::ip::udp::endpoint endpoint = *resolver.resolve(query);
_client_socket = boost::shared_ptr<asio::ip::udp::socket>(new asio::ip::udp::socket(_io_service));
_client_socket->open(asio::ip::udp::v4());
_client_socket->connect(endpoint);
resize_buffs(_client_socket, client_rx_size, client_tx_size);
}
std::cout << "spawning relay threads... " << _port << std::endl;
_thread_group.create_thread(boost::bind(&udp_relay_type::server_thread, this));
spawn_mutex.lock();
spawn_mutex.lock();
spawn_mutex.unlock();
_thread_group.create_thread(boost::bind(&udp_relay_type::client_thread, this));
spawn_mutex.lock();
spawn_mutex.lock();
spawn_mutex.unlock();
std::cout << " done!" << std::endl << std::endl;
}
~udp_relay_type(void){
std::cout << "killing relay threads... " << _port << std::endl;
_thread_group.interrupt_all();
_thread_group.join_all();
std::cout << " done!" << std::endl << std::endl;
}
private:
static void resize_buffs(socket_type sock, const size_t rx_size, const size_t tx_size){
if (rx_size != 0) sock->set_option(asio::socket_base::receive_buffer_size(rx_size));
if (tx_size != 0) sock->set_option(asio::socket_base::send_buffer_size(tx_size));
}
void server_thread(void){
uhd::set_thread_priority_safe();
std::cout << " entering server_thread..." << std::endl;
spawn_mutex.unlock();
std::vector<char> buff(insane_mtu);
while (not boost::this_thread::interruption_requested()){
if (wait_for_recv_ready(_server_socket->native())){
boost::mutex::scoped_lock lock(_endpoint_mutex);
const size_t len = _server_socket->receive_from(asio::buffer(&buff.front(), buff.size()), _endpoint);
lock.unlock();
_client_socket->send(asio::buffer(&buff.front(), len));
//perform sequence error detection on tx dsp data (can detect bad network cards)
/*
if (_port[4] == '7'){
static boost::uint32_t next_seq;
const boost::uint32_t this_seq = ntohl(reinterpret_cast<const boost::uint32_t *>(&buff.front())[0]);
if (next_seq != this_seq and this_seq != 0) std::cout << "S" << std::flush;
next_seq = this_seq + 1;
}
*/
}
}
std::cout << " exiting server_thread..." << std::endl;
}
void client_thread(void){
uhd::set_thread_priority_safe();
std::cout << " entering client_thread..." << std::endl;
spawn_mutex.unlock();
std::vector<char> buff(insane_mtu);
while (not boost::this_thread::interruption_requested()){
if (wait_for_recv_ready(_client_socket->native())){
const size_t len = _client_socket->receive(asio::buffer(&buff.front(), buff.size()));
boost::mutex::scoped_lock lock(_endpoint_mutex);
_server_socket->send_to(asio::buffer(&buff.front(), len), _endpoint);
}
}
std::cout << " exiting client_thread..." << std::endl;
}
const std::string _port;
boost::thread_group _thread_group;
asio::io_service _io_service;
asio::ip::udp::endpoint _endpoint;
boost::mutex _endpoint_mutex;
socket_type _server_socket, _client_socket;
};
/***********************************************************************
* Main
**********************************************************************/
int UHD_SAFE_MAIN(int argc, char *argv[]){
uhd::set_thread_priority_safe();
//variables to be set by po
std::string addr;
std::string bind;
//setup the program options
po::options_description desc("Allowed options");
desc.add_options()
("help", "help message")
("addr", po::value<std::string>(&addr), "the resolvable address of the usrp (must be specified)")
("bind", po::value<std::string>(&bind)->default_value("0.0.0.0"), "bind the server to this network address (default: any)")
;
po::variables_map vm;
po::store(po::parse_command_line(argc, argv, desc), vm);
po::notify(vm);
//print the help message
if (vm.count("help") or not vm.count("addr")){
std::cout
<< boost::format("UHD Network Relay %s") % desc << std::endl
<< "Runs a network relay between UHD on one computer and a USRP on the network.\n"
<< "This example is basically for test purposes. Use at your own convenience.\n"
<< std::endl;
return EXIT_FAILURE;
}
{
boost::shared_ptr<udp_relay_type> ctrl (new udp_relay_type(bind, addr, "49152"));
boost::shared_ptr<udp_relay_type> rxdsp0(new udp_relay_type(bind, addr, "49156", 0, tx_dsp_buff_size, rx_dsp_buff_size, 0));
boost::shared_ptr<udp_relay_type> txdsp0(new udp_relay_type(bind, addr, "49157", tx_dsp_buff_size, 0, 0, tx_dsp_buff_size));
boost::shared_ptr<udp_relay_type> rxdsp1(new udp_relay_type(bind, addr, "49158", 0, tx_dsp_buff_size, rx_dsp_buff_size, 0));
boost::shared_ptr<udp_relay_type> gps (new udp_relay_type(bind, addr, "49172"));
std::signal(SIGINT, &sig_int_handler);
std::cout << "Press Ctrl + C to stop streaming..." << std::endl;
while (not stop_signal_called){
boost::this_thread::sleep(boost::posix_time::milliseconds(100));
}
}
//finished
std::cout << std::endl << "Done!" << std::endl << std::endl;
return EXIT_SUCCESS;
}
|
