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
235
236
237
238
239
240
241
|
#!/usr/bin/env python
#
# Copyright 2006 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio 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 2, or (at your option)
# any later version.
#
# GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
import struct
import socket
import asyncore
import sys
import optparse
import random
from gnuradio.eng_option import eng_option
import gnuradio.gr.gr_threading as _threading
LOOP_TIMEOUT = 0.001
BROADCAST_ADDR = '255.255.255.255'
BROADCAST_PORT = 27010 # UDP
CONTROL_PORT = 27011 # TCP
PKT_HEADER_SIZE = 4 # 32-bit int
logfile = None
def unpack_header(s):
(len,) = struct.unpack('!i', s)
return (len,)
def pack_header(len):
return struct.pack('!i', len)
class control_port_listener(asyncore.dispatcher):
def __init__(self, port=CONTROL_PORT, udp_socket=None, verbose=False):
"""
@param port: TCP port to listen on.
@type port: int
"""
asyncore.dispatcher.__init__(self)
self._verbose = verbose
self._udp_socket = udp_socket
host = '' # symbolic name for localhost
self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
self.set_reuse_addr()
try:
self.bind((host, port))
except socket.error, err:
sys.stderr.write('Failed to bind to %s: %s\n' %
((host, port), os.strerror (err.args[0]),))
sys.exit(1)
self.listen(3)
def handle_accept(self):
socket, addr = self.accept()
sys.stderr.write("handle_accept: %r\n" % (addr,))
if not(socket is None):
# instantiate a server
s = control_server(socket, addr, self._udp_socket, self._verbose)
class gr_dispatcher(asyncore.dispatcher):
def __init__(self, sock=None, map=None):
asyncore.dispatcher.__init__(self, sock=sock, map=map)
def read_packet(self):
"""
Returns None or packet
"""
s = self.recvall(PKT_HEADER_SIZE)
if s == '':
return None
(payload_len,) = unpack_header(s)
payload_len = int(payload_len)
if payload_len == 0:
payload = ''
else:
payload = self.recvall(payload_len)
if len(payload) != payload_len:
sys.stderr.write ('short recv, expected %d bytes, got %d\n' % (
payload_len, len(payload)))
raise RuntimeError, "short recv"
return payload
def recvall(self, buffer_size):
result = ''
while len(result) < buffer_size:
data = self.recv(buffer_size - len(result))
if not data:
return ''
result += data
return result
class pkt_receiver_thread(_threading.Thread):
def __init__(self, socket):
_threading.Thread.__init__(self)
self.setDaemon(1)
self.socket = socket
self.keep_running = True
self.start()
def run(self):
while self.keep_running:
pkt, sender = self.socket.recvfrom(10000)
if pkt:
if len(pkt) > 2:
t = struct.unpack('!H', pkt[0:2])
seqno = t[0]
else:
seqno = -1
logfile.write('RCVD seqno %4d len %4d from %s\n' % (seqno, len(pkt), sender))
logfile.flush()
class control_server(gr_dispatcher):
def __init__(self, socket, addr, udp_socket, verbose=False):
gr_dispatcher.__init__(self, sock=socket)
self._udp_socket = udp_socket
self.verbose = verbose
self.setblocking(1)
def writable(self):
return False
def handle_read(self):
pkt = self.read_packet()
if pkt:
annotate = 'ANNOTATE'
if pkt.startswith(annotate):
logfile.write(pkt[len(annotate)+1:])
logfile.write('\n')
logfile.flush()
elif pkt.startswith('SEND'):
tokens = pkt.split()
if len(tokens) < 4:
invalid_packet(pkt)
else:
npkts = int(tokens[1])
size = int(tokens[2])
power = float(tokens[3])
send_test_packets(self._udp_socket, npkts, size, power)
else:
invalid_packet(pkt)
def handle_close(self):
self.close()
def invalid_packet(pkt):
sys.stderr.write('received unrecognized packet: %s\n' % (pkt,))
def make_random_payload(size):
p = [0] * size
if 1:
for i in range(size):
p[i] = chr(random.randint(0, 255))
else:
for i in range(size):
p[i] = chr(i % 256)
return ''.join(p)
def send_test_packets(udp_socket, npkts, size, power):
# we ignore power for now...
size = max(2, size)
payload = make_random_payload(size - 2)
for n in range(npkts):
pkt = struct.pack('!H', n) + payload
udp_socket.sendto(pkt, (BROADCAST_ADDR, BROADCAST_PORT))
#udp_socket.sendall(pkt)
def open_udp_broadcast_socket(gr0_host_ip, port):
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
# s.bind((gr0_host_ip, port))
s.bind(('', port))
s.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
# s.connect((BROADCAST_ADDR, port))
return s
def main():
global logfile
usage = 'usage: %prog [options] gr0-ip-addr'
parser = optparse.OptionParser (option_class=eng_option, usage=usage)
parser.add_option('-l', '--logfile', type='string', default=None,
help="specify log file name [default=<stdout>]")
parser.add_option('-v', '--verbose', action="store_true", default=False,
help="enable verbose diagnostics")
(options, args) = parser.parse_args ()
if len(args) != 1:
parser.print_help()
sys.exit(1)
gr0_ip_addr = args[0]
if options.logfile is None:
logfile = sys.stdout
else:
logfile = file(options.logfile, 'w')
udp_socket = open_udp_broadcast_socket(gr0_ip_addr, BROADCAST_PORT)
R = pkt_receiver_thread(udp_socket)
L = control_port_listener(CONTROL_PORT, udp_socket=udp_socket, verbose=options.verbose)
asyncore.loop(LOOP_TIMEOUT)
if __name__ == '__main__':
try:
main()
except KeyboardInterrupt:
pass
|
