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psl_class.py
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psl_class.py
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#!/usr/bin/python
# -*- coding: utf-8 -*-
"Main Class to communicate with gs108e and gs105e netgear switches"
import time
import binascii
import pprint
import random
import struct
import socket
import fcntl
import psl_typ
import inspect
import errno
def get_hw_addr(ifname):
"gives the hardware (mac) address of an interface (eth0,eth1..)"
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
ifname = ifname.encode('ascii') # struct.pack requires bytes in Python 3
info = fcntl.ioctl(sock.fileno(), 0x8927, struct.pack('256s', ifname[:15]))
if type(info) is str:
return ''.join(['%02x:' % ord(char) for char in info[18:24]])[:-1]
else:
# Python 3 returns a list of bytes from ioctl, no need for ord()
return ''.join(['%02x:' % char for char in info[18:24]])[:-1]
def get_ip_address(ifname):
"returns the first ip address of an interface"
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
ifname = ifname.encode('ascii') # struct.pack requires bytes in Python 3
try:
# 0x8915 = SIOCGIFADDR
addr = socket.inet_ntoa(fcntl.ioctl(sock.fileno(), 0x8915,
struct.pack('256s',
ifname[:15]))[20:24])
return addr
except IOError as err:
if err.errno == errno.EADDRNOTAVAIL:
return None
raise
def pack_mac(value):
"packs the hardware address (mac) to the internal representation"
value = value.encode() # binascii.unhexlify() requires bytes in Python 3
if (len(value) == 17):
return binascii.unhexlify(value[0:2] + value[3:5] + value[6:8] +
value[9:11] + value[12:14] + value[15:17])
if (len(value) == 12):
return binascii.unhexlify(value)
raise "unknown mac format=" + value
def unpack_mac(value):
"unpack an internal representation to a hardware address"
mac = binascii.hexlify(value)
return (mac[0:2] + ":" + mac[2:4] + ":" + mac[4:6] + ":" + mac[6:8] +
":" + mac[8:10] + ":" + mac[10:12])
class ProSafeLinux:
"Main class to communicate with a ProSafe gs108e gs105e Switch"
CMD_MODEL = psl_typ.PslTypStringQueryOnly(0x0001, "model")
CMD_FIMXE2 = psl_typ.PslTypHex(0x0002, "fixme2")
CMD_NAME = psl_typ.PslTypString(0x0003, "name")
CMD_MAC = psl_typ.PslTypMac(0x0004, "MAC")
CMD_FIMXE5 = psl_typ.PslTypHex(0x0005, "fixme5")
CMD_IP = psl_typ.PslTypIpv4(0x0006, "ip")
CMD_NETMASK = psl_typ.PslTypIpv4(0x0007, "netmask")
CMD_GATEWAY = psl_typ.PslTypIpv4(0x0008, "gateway")
CMD_NEW_PASSWORD = psl_typ.PslTypPassword(0x0009, "new_password", True)
CMD_PASSWORD = psl_typ.PslTypPassword(0x000a, "password", False)
CMD_DHCP = psl_typ.PslTypDHCP(0x000b, "dhcp")
CMD_FIXMEC = psl_typ.PslTypHex(0x000c, "fixmeC")
CMD_FIRMWAREV = psl_typ.PslTypStringQueryOnly(0x000d, "firmwarever")
CMD_FIMXEE = psl_typ.PslTypHex(0x000e, "fixmeE")
CMD_FIXMEF = psl_typ.PslTypHex(0x000f, "fixmeF")
CMD_REBOOT = psl_typ.PslTypAction(0x0013, "reboot")
CMD_FACTORY_RESET = psl_typ.PslTypAction(0x0400, "factory_reset")
CMD_SPEED_STAT = psl_typ.PslTypSpeedStat(0x0c00, "speed_stat")
CMD_PORT_STAT = psl_typ.PslTypPortStat(0x1000, "port_stat")
CMD_RESET_PORT_STAT = psl_typ.PslTypAction(0x1400, "reset_port_stat")
CMD_TEST_CABLE = psl_typ.PslTypHexNoQuery(0x1800, "test_cable")
CMD_TEST_CABLE_RESP = psl_typ.PslTypHexNoQuery(0x1c00, "test_cable_resp")
CMD_VLAN_SUPPORT = psl_typ.PslTypVlanSupport(0x2000, "vlan_support")
CMD_VLAN_ID = psl_typ.PslTypVlanId(0x2400, "vlan_id")
CMD_VLAN802_ID = psl_typ.PslTypVlan802Id(0x2800, "vlan802_id")
CMD_VLANPVID = psl_typ.PslTypVlanPVID(0x3000, "vlan_pvid")
CMD_QUALITY_OF_SERVICE = psl_typ.PslTypQos(0x3400, "qos")
CMD_PORT_BASED_QOS = psl_typ.PslTypPortBasedQOS(0x3800, "port_based_qos")
CMD_BANDWIDTH_INCOMING_LIMIT = psl_typ.PslTypBandwidth(
0x4c00, "bandwidth_in")
CMD_BANDWIDTH_OUTGOING_LIMIT = psl_typ.PslTypBandwidth(
0x5000, "bandwidth_out")
CMD_FIXME5400 = psl_typ.PslTypHex(0x5400, "fixme5400")
CMD_BROADCAST_BANDWIDTH = psl_typ.PslTypBandwidth(0x5800,
"broadcast_bandwidth")
CMD_PORT_MIRROR = psl_typ.PslTypPortMirror(0x5c00, "port_mirror")
CMD_NUMBER_OF_PORTS = psl_typ.PslTypHex(0x6000, "number_of_ports")
CMD_IGMP_SNOOPING = psl_typ.PslTypIGMPSnooping(0x6800, "igmp_snooping")
CMD_BLOCK_UNKNOWN_MULTICAST = psl_typ.PslTypBoolean(
0x6c00, "block_unknown_multicast")
CMD_IGMP_HEADER_VALIDATION = psl_typ.PslTypBoolean(0x7000,
"igmp_header_validation")
CMD_FIXME7400 = psl_typ.PslTypHex(0x7400, "fixme7400")
CMD_END = psl_typ.PslTypEnd(0xffff, "END")
CTYPE_QUERY_REQUEST = 0x0101
# CTYPE_QUERY_RESPONSE = 0x0102
CTYPE_TRANSMIT_REQUEST = 0x103
# CTYPE_TRANSMIT_RESPONSE = 0x104
RECPORT = 63321
SENDPORT = 63322
def __init__(self):
"constructor"
self.myhost = None
self.srcmac = None
self.ssocket = None
self.rsocket = None
self.timeout=0.1
# i still see no win in randomizing the starting sequence...
self.seq = random.randint(100, 2000)
self.debug = False
self.mac_cache = {}
self.cmd_by_id = {}
self.cmd_by_name = {}
for key, value in inspect.getmembers(ProSafeLinux):
if key.startswith("CMD_"):
self.cmd_by_name[value.get_name()] = value
self.cmd_by_id[value.get_id()] = value
def set_timeout(self, timeout):
self.timeout=timeout
def bind(self, interface):
"bind to an interface"
self.myhost = get_ip_address(interface)
if not self.myhost:
return False
self.srcmac = pack_mac(get_hw_addr(interface))
# send socket
self.ssocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
self.ssocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
self.ssocket.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
self.ssocket.bind((self.myhost, self.RECPORT))
# receive socket
self.rsocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
self.rsocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
self.rsocket.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
self.rsocket.bind(("255.255.255.255", self.RECPORT))
return True
def get_query_cmds(self):
"return all commands which can be used in a query"
rtn = []
for cmd in list(self.cmd_by_name.values()):
if cmd.is_queryable():
rtn.append(cmd)
return rtn
def get_setable_cmds(self):
"returns all commands which can be set"
rtn = []
for cmd in list(self.cmd_by_name.values()):
if cmd.is_setable():
rtn.append(cmd)
return rtn
def get_cmd_by_name(self, name):
"return a command by its name"
if name in self.cmd_by_name:
return self.cmd_by_name[name]
else:
return None
def get_cmd_by_hex(self, cmd_id):
"return a command by its hex_value"
if cmd_id in self.cmd_by_id:
return self.cmd_by_id[cmd_id]
else:
return False
def set_debug_output(self):
"set debugging"
self.debug = True
def recv(self, maxlen=8192):
"receive a packet from the switch"
self.rsocket.settimeout(self.timeout)
try:
message, address = self.rsocket.recvfrom(maxlen)
except socket.timeout:
return (None, None)
except socket.error as error:
# according to the Python documentation this error
# is system-specifc; this works on Linux
if error.errno == errno.EAGAIN:
return (None, None)
raise
if self.debug:
message_hex = binascii.hexlify(message).decode()
print("recv=" + message_hex)
return (message, address)
def recv_all(self):
"receive all pending packets"
while True:
(message, address) = self.recv()
if message is None:
return (None, address)
return (message, address)
def parse_data(self, pack):
"unpack packet send by the switch"
if pack == None:
return False
if self.debug:
pprint.pprint(len(pack[2:4]))
data = {}
if struct.unpack(">H", pack[2:4])[0] != 0x0000:
errorcmd = self.get_cmd_by_hex(struct.unpack(">H", pack[4:6])[0])
if errorcmd:
data["error"] = errorcmd.get_name()
else:
data["error"] = struct.unpack(">H", pack[4:6])[0]
# data["seq"] = struct.unpack(">H", pack[22:24])[0]
# data["ctype"] = struct.unpack(">H", pack[0:2])[0]
# data["mymac"] = binascii.hexlify(pack[8:14])
# data["theirmac"] = binascii.hexlify(pack[14:20]).decode()
pos = 32
cmd_id = 0
while (pos<len(pack)):
if self.debug:
print("pos:%d len: %d" %(pos,len(pack)))
cmd_id = struct.unpack(">H", pack[pos:(pos + 2)])[0]
if self.get_cmd_by_hex(cmd_id):
cmd = self.get_cmd_by_hex(cmd_id)
else:
# we don't need a switch for "unknown_warn" here...let the client handle unknown responses
# print("Unknown Response %d" % cmd_id)
cmd = psl_typ.PslTypUnknown(cmd_id, "UNKNOWN %d" % cmd_id)
pos = pos + 2
cmdlen = struct.unpack(">H", pack[pos:(pos + 2)])[0]
pos = pos + 2
if cmdlen > 0:
value = cmd.unpack_cmd(pack[pos:(pos + cmdlen)])
else:
value = None
if cmd in data and value != None:
if type(data[cmd]) != type(list()):
data[cmd] = [data[cmd]]
data[cmd].append(value)
elif value != None:
data[cmd] = value
if self.debug:
print("cmd_id %d of length %d :" % (cmd_id, cmdlen))
data_hex = binascii.hexlify(pack[pos:(pos + cmdlen)]).decode()
print("data=" + data_hex)
pos = pos + cmdlen
return data
def send(self, host, port, data):
"send data to host on port"
if self.debug:
# binascii.unhexlify() requires bytes in Python 3
data_hex = binascii.hexlify(data).decode()
print("send to ip " + host + " data = " + data_hex)
self.ssocket.sendto(data, (host, port))
self.seq += 1
def baseudp(self, ctype, destmac):
"Base UDP Package"
reserved = b"\x00"
if destmac is None:
destmac = 6 * b"\x00"
if len(destmac) > 6:
destmac = pack_mac(destmac)
data = (struct.pack(">h", ctype) + 6 * reserved + self.srcmac +
destmac + 2 * reserved)
data += struct.pack(">h", self.seq)
data += b"NSDP" + 4 * reserved
return data
@staticmethod
def addudp(cmd, datain=None):
"Additional data to the base package"
data = struct.pack(">H", cmd.get_id())
if (datain is None):
data += struct.pack(">H", 0)
else:
pdata = cmd.pack_py(datain)
data += struct.pack(">H", len(pdata))
data += pdata
return data
def ip_from_mac(self, mac):
"query for the ip of a switch with a given mac address"
if mac is None:
return "255.255.255.255"
if mac in self.mac_cache:
return self.mac_cache[mac]
# FIXME: Search in /proc/net/arp if mac there use this one
#with open("/proc/net/arp") as f:
# for line in f:
# print line
query_arr = [self.CMD_MAC, self.CMD_IP]
message, address = self.query(query_arr, mac, with_address=True, use_ip_func=False)
if message == None:
# try once more
message, address = self.query(query_arr, mac, with_address=True, use_ip_func=False)
if message != None and message != False:
if self.CMD_MAC in message:
if message[self.CMD_MAC].capitalize() == mac.capitalize():
return address[0]
return "255.255.255.255"
def send_query(self, cmd_arr, mac, use_ip_func=True):
"request some values from a switch, without changing them"
if use_ip_func:
ipadr = self.ip_from_mac(mac)
else:
ipadr = "255.255.255.255"
data = self.baseudp(destmac=mac, ctype=self.CTYPE_QUERY_REQUEST)
for cmd in cmd_arr:
data += self.addudp(cmd)
data += self.addudp(self.CMD_END)
self.send(ipadr, self.SENDPORT, data)
def query(self, cmd_arr, mac, with_address=False, use_ip_func=True):
"get some values from the switch, but do not change them"
# translate non-list to list
if type(cmd_arr).__name__ != 'tupe' and type(cmd_arr).__name__ != 'list':
cmd_arr = (cmd_arr, )
self.send_query(cmd_arr, mac, use_ip_func)
message, address = self.recv_all()
if with_address:
return (self.parse_data(message), address)
else:
return self.parse_data(message)
def transmit(self, cmddict, mac):
"change something in the switch, like name, mac ..."
transmit_counter = 0
ipadr = self.ip_from_mac(mac)
data = self.baseudp(destmac=mac, ctype=self.CTYPE_TRANSMIT_REQUEST)
firmwarevers = self.query(self.get_cmd_by_name("firmwarever"), mac)
firmwarevers = firmwarevers.values()[0].translate({ord("."):None})
if type(cmddict).__name__ == 'dict':
if self.CMD_PASSWORD in cmddict:
if int(firmwarevers) > 10004:
print("using password hack on firmware: %s" %
(firmwarevers))
_hashkey = "NtgrSmartSwitchRock"
_plainpass = cmddict[self.CMD_PASSWORD]
_password = ""
for i in range(len(_plainpass)):
_password += chr(ord(_plainpass[i]) ^ ord(_hashkey[i]))
else:
_password = cmddict[self.CMD_PASSWORD]
data += self.addudp(self.CMD_PASSWORD, _password)
for cmd, pdata in list(cmddict.items()):
if cmd != self.CMD_PASSWORD:
data += self.addudp(cmd, pdata)
elif type(cmddict).__name__ == 'string':
print 'got string!'
data += cmddict
data += self.addudp(self.CMD_END)
self.send(ipadr, self.SENDPORT, data)
message, address = self.recv_all()
while message == None and transmit_counter < 3:
time.sleep(1)
message, address = self.recv_all()
transmit_counter += 1
if message == None:
return { 'error' : 'no result received within 3 seconds' }
return self.parse_data(message)
def passwd_exploit(self, mac, new):
"exploit in current (2012) firmware version, set a new password"
# The order of the CMD_PASSWORD and CMD_NEW_PASSWORD is important
data = self.addudp(self.CMD_NEW_PASSWORD, new)
data += self.addudp(self.CMD_PASSWORD, new)
return self.transmit(data, mac)
def discover(self):
"find any switch in the network"
query_arr = [self.CMD_MODEL,
self.CMD_NAME,
self.CMD_MAC,
self.CMD_DHCP,
self.CMD_IP]
message = self.query(query_arr, None)
if message != False:
self.mac_cache[message[self.CMD_MAC]] = message[self.CMD_IP]
return message
def verify_data(self, datadict):
"Verify the data we want to set on the switch"
errors = []
if ProSafeLinux.CMD_DHCP in datadict:
if datadict[ProSafeLinux.CMD_DHCP]:
if ((ProSafeLinux.CMD_IP in datadict) or
(ProSafeLinux.CMD_GATEWAY in datadict) or
(ProSafeLinux.CMD_NETMASK in datadict)):
errors.append("When dhcp=on, no ip,gateway nor netmask is allowed")
else:
if (not((ProSafeLinux.CMD_IP in datadict) and
(ProSafeLinux.CMD_GATEWAY in datadict) and
(ProSafeLinux.CMD_NETMASK in datadict))):
errors.append("When dhcp=off, specify ip,gateway and netmask")
else:
if ((ProSafeLinux.CMD_IP in datadict) or
(ProSafeLinux.CMD_GATEWAY in datadict) or
(ProSafeLinux.CMD_NETMASK in datadict)):
errors.append("Use dhcp on,ip,gateway and netmask option together")
if len(errors) > 0:
return (False, errors)
else:
return (True, None)