On Thu, Nov 6, 2014 at 6:41 PM, Jonathan Fox <[email protected]> wrote:
> I am trying to run the example simple_trx.py script from the gr-mac module > and I am having an issue related to what I believe is > gr::blocks::tuntap_pdu. > > This is what I am doing. > > I open up a couple of terminal windows and in two of them I place in these > separate commands. > > [root@xxxx project]# ./simple_trx.py --radio-addr 85 --dest-addr 86 > --port 12345 -a addr=10.2.8.104 > > [root@xxxx project]# ./simple_trx.py --radio-addr 86 --dest-addr 85 > --port 12346 -a addr=10.2.8.105 > > The former will run just fine and then the second one gives me this error > > [root@xxxx project]# ./simple_trx.py --radio-addr 86 --dest-addr 85 > --port 12346 -a addr=10.2.8.105 > linux; GNU C++ version 4.4.7 20120313 (Red Hat 4.4.7-4); Boost_104100; > UHD_003.007.001-64-g92b0b7ab > > libGL error: failed to load driver: nouveau > libGL error: Try again with LIBGL_DEBUG=verbose for more details. > Using Volk machine: sse4_2_64 > Simple MAC ARQ in non-blocking mode > <virtual_channel_encoder[25]> MTU: 128 > 'post_msg' not found. Using 'message_port_pub' instead. > Virtual channel encoder in non-blocking mode > <virtual_channel_encoder[26]> MTU: 128 > 'post_msg' not found. Using 'message_port_pub' instead. > Virtual channel encoder in non-blocking mode > -- Opening a USRP2/N-Series device... > -- Current recv frame size: 1472 bytes > -- Current send frame size: 1472 bytes > -- Detecting internal GPSDO.... Found an internal GPSDO > -- found > -- Setting references to the internal GPSDO > -- Initializing time to the internal GPSDO > <burst_tagger[36]> tag name: length, multiplier: 32.000000, tag front: 0, > tag rear: 16, drop residue: yes, verbose: yes > bits per symbol = 1 > M&M clock recovery omega = 4.000000 > M&M clock recovery gain mu = 0.175000 > M&M clock recovery mu = 0.500000 > M&M clock recovery omega rel. limit = 0.005000 > frequency error = 0.000000 > Traceback (most recent call last): > File "./simple_trx.py", line 386, in <module> > tb = simple_trx(args=options.args, tx_lo_offset=options.tx_lo_offset, > rx_lo_offset=options.rx_lo_offset, rate=options.rate, > rx_antenna=options.rx_antenna, rx_freq=options.rx_freq, > tx_freq=options.tx_freq, rx_gain=options.rx_gain, tx_gain=options.tx_gain, > samps_per_sym=options.samps_per_sym, ampl=options.ampl, > arq_timeout=options.arq_timeout, dest_addr=options.dest_addr, > max_arq_attempts=options.max_arq_attempts, radio_addr=options.radio_addr, > iface=options.iface, mtu=options.mtu, port=options.port) > File "./simple_trx.py", line 157, in __init__ > self.blocks_tuntap_pdu_0 = blocks.tuntap_pdu(iface, mtu*0 + 1514) > File > "/usr/local/lib64/python2.6/site-packages/gnuradio/blocks/blocks_swig5.py", > line 1796, in make > return _blocks_swig5.tuntap_pdu_make(*args, **kwargs) > RuntimeError: gr::tuntap_pdu::make: tun_alloc failed (are you running as > root?) > > Of course I am running this as root. Why can't I have two instances of > this running? > > Jonathan Fox > Alright figured out my issue. I needed to specify a different interface for the second instance of simple_trx so I couldn't let it default to "tun0" so I specified it as "tun1". Jonathan Fox
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