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
229
230
231
232
233
234
|
//
// 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 "usrp2_impl.hpp"
#include <uhd/transport/if_addrs.hpp>
#include <uhd/transport/udp_simple.hpp>
#include <uhd/usrp/device_props.hpp>
#include <uhd/utils/assert.hpp>
#include <uhd/utils/static.hpp>
#include <boost/algorithm/string.hpp>
#include <boost/assign/list_of.hpp>
#include <boost/format.hpp>
#include <boost/foreach.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/bind.hpp>
#include <boost/asio.hpp> //htonl and ntohl
#include <iostream>
using namespace uhd;
using namespace uhd::usrp;
using namespace uhd::transport;
namespace asio = boost::asio;
//! wait this long for a control response when discovering devices
static const size_t DISCOVERY_TIMEOUT_MS = 100;
/***********************************************************************
* Helper Functions
**********************************************************************/
std::vector<std::string> split_addrs(const std::string &addrs_str){
std::vector<std::string> addrs;
boost::split(addrs, addrs_str, boost::is_any_of("\t "));
return addrs;
}
template <class T> std::string num2str(T num){
return boost::lexical_cast<std::string>(num);
}
/***********************************************************************
* Discovery over the udp transport
**********************************************************************/
static uhd::device_addrs_t usrp2_find(const device_addr_t &hint){
device_addrs_t usrp2_addrs;
//return an empty list of addresses when type is set to non-usrp2
if (hint.has_key("type") and hint["type"] != "usrp2") return usrp2_addrs;
//if no address was specified, send a broadcast on each interface
if (not hint.has_key("addr")){
BOOST_FOREACH(const if_addrs_t &if_addrs, get_if_addrs()){
//avoid the loopback device
if (if_addrs.inet == asio::ip::address_v4::loopback().to_string()) continue;
//create a new hint with this broadcast address
device_addr_t new_hint;
new_hint["addr"] = if_addrs.bcast;
//call discover with the new hint and append results
device_addrs_t new_usrp2_addrs = usrp2_find(new_hint);
usrp2_addrs.insert(usrp2_addrs.begin(),
new_usrp2_addrs.begin(), new_usrp2_addrs.end()
);
}
return usrp2_addrs;
}
//if there are multiple addresses, just return good, dont test
std::vector<std::string> addrs = split_addrs(hint["addr"]);
if (addrs.size() > 1){
device_addr_t new_addr;
new_addr["type"] = "usrp2";
new_addr["addr"] = hint["addr"];
usrp2_addrs.push_back(new_addr);
return usrp2_addrs;
}
//create a udp transport to communicate
std::string ctrl_port = boost::lexical_cast<std::string>(USRP2_UDP_CTRL_PORT);
udp_simple::sptr udp_transport = udp_simple::make_broadcast(
hint["addr"], ctrl_port
);
//send a hello control packet
usrp2_ctrl_data_t ctrl_data_out;
ctrl_data_out.proto_ver = htonl(USRP2_FW_COMPAT_NUM);
ctrl_data_out.id = htonl(USRP2_CTRL_ID_WAZZUP_BRO);
udp_transport->send(boost::asio::buffer(&ctrl_data_out, sizeof(ctrl_data_out)));
//loop and recieve until the timeout
boost::uint8_t usrp2_ctrl_data_in_mem[udp_simple::mtu]; //allocate max bytes for recv
const usrp2_ctrl_data_t *ctrl_data_in = reinterpret_cast<const usrp2_ctrl_data_t *>(usrp2_ctrl_data_in_mem);
while(true){
size_t len = udp_transport->recv(asio::buffer(usrp2_ctrl_data_in_mem), DISCOVERY_TIMEOUT_MS);
//std::cout << len << "\n";
if (len > offsetof(usrp2_ctrl_data_t, data)){
//handle the received data
switch(ntohl(ctrl_data_in->id)){
case USRP2_CTRL_ID_WAZZUP_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["type"] = "usrp2";
new_addr["addr"] = ip_addr.to_string();
usrp2_addrs.push_back(new_addr);
//dont break here, it will exit the while loop
//just continue on to the next loop iteration
}
}
if (len == 0) break; //timeout
}
return usrp2_addrs;
}
/***********************************************************************
* Make
**********************************************************************/
template <typename out_type, typename in_type>
out_type lexical_cast(const in_type &in){
try{
return boost::lexical_cast<out_type>(in);
}catch(...){
throw std::runtime_error(str(boost::format(
"failed to cast \"%s\" to type \"%s\""
) % boost::lexical_cast<std::string>(in) % typeid(out_type).name()));
}
}
static device::sptr usrp2_make(const device_addr_t &device_addr){
//extract the receive and send buffer sizes
size_t recv_buff_size = 0, send_buff_size= 0 ;
if (device_addr.has_key("recv_buff_size")){
recv_buff_size = size_t(lexical_cast<double>(device_addr["recv_buff_size"]));
}
if (device_addr.has_key("send_buff_size")){
send_buff_size = size_t(lexical_cast<double>(device_addr["send_buff_size"]));
}
//create a ctrl and data transport for each address
std::vector<udp_simple::sptr> ctrl_transports;
std::vector<udp_zero_copy::sptr> data_transports;
BOOST_FOREACH(const std::string &addr, split_addrs(device_addr["addr"])){
ctrl_transports.push_back(udp_simple::make_connected(
addr, num2str(USRP2_UDP_CTRL_PORT)
));
data_transports.push_back(udp_zero_copy::make(
addr, num2str(USRP2_UDP_DATA_PORT),
recv_buff_size, send_buff_size
));
}
//create the usrp2 implementation guts
return device::sptr(
new usrp2_impl(ctrl_transports, data_transports)
);
}
UHD_STATIC_BLOCK(register_usrp2_device){
device::register_device(&usrp2_find, &usrp2_make);
}
/***********************************************************************
* Structors
**********************************************************************/
usrp2_impl::usrp2_impl(
std::vector<udp_simple::sptr> ctrl_transports,
std::vector<udp_zero_copy::sptr> data_transports
):
_data_transports(data_transports)
{
//create a new mboard handler for each control transport
for(size_t i = 0; i < ctrl_transports.size(); i++){
_mboards.push_back(usrp2_mboard_impl::sptr(
new usrp2_mboard_impl(i, ctrl_transports[i], _io_helper)
));
//use an empty name when there is only one mboard
std::string name = (ctrl_transports.size() > 1)? boost::lexical_cast<std::string>(i) : "";
_mboard_dict[name] = _mboards.back();
}
//init the send and recv io
io_init();
}
usrp2_impl::~usrp2_impl(void){
/* NOP */
}
/***********************************************************************
* Device Properties
**********************************************************************/
void usrp2_impl::get(const wax::obj &key_, wax::obj &val){
wax::obj key; std::string name;
boost::tie(key, name) = extract_named_prop(key_);
//handle the get request conditioned on the key
switch(key.as<device_prop_t>()){
case DEVICE_PROP_NAME:
if (_mboards.size() > 1) val = std::string("usrp2 mimo device");
else val = std::string("usrp2 device");
return;
case DEVICE_PROP_MBOARD:
val = _mboard_dict[name]->get_link();
return;
case DEVICE_PROP_MBOARD_NAMES:
val = prop_names_t(_mboard_dict.keys());
return;
default: UHD_THROW_PROP_GET_ERROR();
}
}
void usrp2_impl::set(const wax::obj &, const wax::obj &){
UHD_THROW_PROP_SET_ERROR();
}
|
