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a48747be45
The script was using invalid string/binary string conversions with Python3. Also, it was moved from optparse to argparse.
69 lines
2.0 KiB
Python
Executable File
69 lines
2.0 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# Copyright 2010-2011 Ettus Research LLC
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# Copyright 2018 Ettus Research, a National Instruments Company
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#
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# SPDX-License-Identifier: GPL-3.0-or-later
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#
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"""
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The usrp2 recovery app:
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When the usrp2 has an unknown or bad ip address in its eeprom,
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it may not be possible to communicate with the usrp2 over ip/udp.
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This app will send a raw ethernet packet to bypass the ip layer.
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The packet will contain a known ip address to burn into eeprom.
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Because the recovery packet is sent with a broadcast mac address,
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only one usrp2 should be present on the interface upon execution.
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This app requires super-user privileges and only works on linux.
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"""
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import socket
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import struct
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import argparse
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BCAST_MAC_ADDR = 'ff:ff:ff:ff:ff:ff'
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RECOVERY_ETHERTYPE = 0xbeee
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IP_RECOVERY_CODE = b'addr'
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def mac_addr_repr_to_binary_string(mac_addr):
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"""
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Convert string representation of MAC address (xx:yy:zz:aa:bb:cc) into a
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binary string.
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"""
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return bytes(bytearray([int(x, 16) for x in mac_addr.split(':')]))
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if __name__ == '__main__':
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parser = argparse.ArgumentParser(usage='usage: %(prog)s [options]\n'+__doc__)
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parser.add_argument(
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'--ifc',
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help='ethernet interface name [default=%(default)s]',
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default='eth0')
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parser.add_argument(
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'--new-ip',
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help='ip address to set [default=%(default)s]',
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default='192.168.10.2')
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args = parser.parse_args()
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#create the raw socket
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print("Opening raw socket on interface:", args.ifc)
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soc = socket.socket(socket.PF_PACKET, socket.SOCK_RAW)
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soc.bind((args.ifc, RECOVERY_ETHERTYPE))
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#create the recovery packet
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print("Loading packet with ip address:", args.new_ip)
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packet = struct.pack(
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'!6s6sH4s4s',
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mac_addr_repr_to_binary_string(BCAST_MAC_ADDR),
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mac_addr_repr_to_binary_string(BCAST_MAC_ADDR),
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RECOVERY_ETHERTYPE,
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IP_RECOVERY_CODE,
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socket.inet_aton(args.new_ip),
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)
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print("Sending packet ({} bytes)".format(len(packet)))
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soc.send(packet)
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print("Done")
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