python类htons()的实例源码

def __init__(self, ifname, user_id=None, user_pw=None, interactive=False):

        self.state = 0

        self.user_id = user_id
        self.user_pw = user_pw

        self.interactive = interactive

        self.assoc_hwaddr = None

        self.ifname = ifname
        self.sock = socket.socket(socket.PF_PACKET, socket.SOCK_RAW, socket.htons(ETH_P_PAE))
        self.sock.bind((ifname, 0))
        self.ifindex = get_ifindex(self.sock, self.ifname)
        self.hwaddr = get_hwaddr(self.sock, self.ifname)

        SOL_PACKET = 263
        PACKET_ADD_MEMBERSHIP = 1
        self.sock.setsockopt(SOL_PACKET, PACKET_ADD_MEMBERSHIP,
                build_mreq(self.ifindex))

def __init__(self, srcp, dstp):
        self.srcp = srcp
        self.dstp = dstp
        self.seqn = 10
        self.ackn = 0
        self.offset = 5 # Data offset: 5x4 = 20 bytes
        self.reserved = 0
        self.urg = 0
        self.ack = 0
        self.psh = 0
        self.rst = 0
        self.syn = 1
        self.fin = 0
        self.window = socket.htons(5840)
        self.checksum = 0
        self.urgp = 0
        self.payload = ""

def send_one_ping(my_socket, dest_addr, ID):
    """
    Send one ping to the given >dest_addr<.
    """
    dest_addr  =  socket.gethostbyname(dest_addr)

    # Header is type (8), code (8), checksum (16), id (16), sequence (16)
    my_checksum = 0

    # Make a dummy heder with a 0 checksum.
    header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, my_checksum, ID, 1)
    bytesInDouble = struct.calcsize("d")
    data = (192 - bytesInDouble) * "Q"
    data = struct.pack("d", default_timer()) + data

    # Calculate the checksum on the data and the dummy header.
    my_checksum = checksum(header + data)

    # Now that we have the right checksum, we put that in. It's just easier
    # to make up a new header than to stuff it into the dummy.
    header = struct.pack(
        "bbHHh", ICMP_ECHO_REQUEST, 0, socket.htons(my_checksum), ID, 1
    )
    packet = header + data
    my_socket.sendto(packet, (dest_addr, 1)) # Don't know about the 1

def send_ping(self, sock,  ID):
        """
        Send ping to the target host
        """
        target_addr  =  socket.gethostbyname(self.target_host)

        my_checksum = 0

        # Create a dummy heder with a 0 checksum.
        header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, my_checksum, ID, 1)
        bytes_In_double = struct.calcsize("d")
        data = (192 - bytes_In_double) * "Q"
        data = struct.pack("d", time.time()) + bytes(data.encode('utf-8'))

        # Get the checksum on the data and the dummy header.
        my_checksum = self.do_checksum(header + data)
        header = struct.pack(
            "bbHHh", ICMP_ECHO_REQUEST, 0, socket.htons(my_checksum), ID, 1
        )
        packet = header + data
        sock.sendto(packet, (target_addr, 1))

def await_responce(self, iface):
        global rev
        r = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(0x0003))
        pkt = r.recvfrom(2048)

        eth = pkt[0][0:14]
        eth_d = struct.unpack("!6s6s2s", eth)
        res = binascii.hexlify(eth_d[0])

        dst_mac = self.format_mac(res.decode('utf-8'))

        local_mac = open('/sys/class/net/{}/address'.format(iface)).read().strip('\n')

        if dst_mac == local_mac:
            stop_time = datetime.datetime.now()
            arp_h = pkt[0][14:42]
            arp_d = struct.unpack("2s2s1s1s2s6s4s6s4s", arp_h)
            timee = stop_time - start_time
            rev += 1
            return self.format_mac(binascii.hexlify(arp_d[5]).decode('utf-8')), arp_d[6], timee.total_seconds() * 1000

def __init__(self, srcp, dstp):
        self.srcp = srcp
        self.dstp = dstp
        self.seqn = 10
        self.ackn = 0
        self.offset = 5 # Data offset: 5x4 = 20 bytes
        self.reserved = 0
        self.urg = 0
        self.ack = 0
        self.psh = 0
        self.rst = 0
        self.syn = 1
        self.fin = 0
        self.window = socket.htons(5840)
        self.checksum = 0
        self.urgp = 0
        self.payload = ""

def send_ping(self, sock,  ID):
        """
        Send ping to the target host
        """
        target_addr  =  socket.gethostbyname(self.target_host)

        my_checksum = 0

        # Create a dummy heder with a 0 checksum.
        header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, my_checksum, ID, 1)
        bytes_In_double = struct.calcsize("d")
        data = (192 - bytes_In_double) * "Q"
        data = struct.pack("d", time.time()) + data

        # Get the checksum on the data and the dummy header.
        my_checksum = self.do_checksum(header + data)
        header = struct.pack(
            "bbHHh", ICMP_ECHO_REQUEST, 0, socket.htons(my_checksum), ID, 1
        )
        packet = header + data
        sock.sendto(packet, (target_addr, 1))

def make_header(self, source_ip, destination_ip, data_len, transport_protocol_len, transport_protocol, ttl=64):
        srcip = inet_aton(source_ip)       # Source port
        dstip = inet_aton(destination_ip)  # Destination port
        ver = 4       # IP protocol version
        ihl = 5       # Internet Header Length
        dscp_ecn = 0  # Differentiated Services Code Point and Explicit Congestion Notification

        tlen = data_len + transport_protocol_len + 20  # Packet length
        ident = htons(randint(1, 65535))  # Identification
        flg_frgoff = 0  # Flags and fragmentation offset
        ptcl = transport_protocol  # Protocol
        chksm = 0  # Checksum

        ip_header = pack("!" "2B" "3H" "2B" "H" "4s" "4s",
                         (ver << 4) + ihl, dscp_ecn, tlen, ident,
                         flg_frgoff, ttl, ptcl, chksm, srcip, dstip)
        chksm = self.checksum(ip_header)
        return pack("!" "2B" "3H" "2B" "H" "4s" "4s",
                    (ver << 4) + ihl, dscp_ecn, tlen, ident,
                    flg_frgoff, ttl, ptcl, chksm, srcip, dstip)

def send_one_ping(my_socket, dest_addr, ID):
    """
    Send one ping to the given >dest_addr<.
    """
    dest_addr  =  socket.gethostbyname(dest_addr)

    # Header is type (8), code (8), checksum (16), id (16), sequence (16)
    my_checksum = 0

    # Make a dummy heder with a 0 checksum.
    header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, my_checksum, ID, 1)
    bytesInDouble = struct.calcsize("d")
    data = (192 - bytesInDouble) * "Q"
    data = struct.pack("d", default_timer()) + data

    # Calculate the checksum on the data and the dummy header.
    my_checksum = checksum(header + data)

    # Now that we have the right checksum, we put that in. It's just easier
    # to make up a new header than to stuff it into the dummy.
    header = struct.pack(
        "bbHHh", ICMP_ECHO_REQUEST, 0, socket.htons(my_checksum), ID, 1
    )
    packet = header + data
    my_socket.sendto(packet, (dest_addr, 1)) # Don't know about the 1

def send_one_ping(my_socket, dest_addr, ID):
    """
    Send one ping to the given >dest_addr<.
    """
    dest_addr  =  socket.gethostbyname(dest_addr)

    # Header is type (8), code (8), checksum (16), id (16), sequence (16)
    my_checksum = 0

    # Make a dummy heder with a 0 checksum.
    header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, my_checksum, ID, 1)
    bytesInDouble = struct.calcsize("d")
    data = (192 - bytesInDouble) * "Q"
    data = struct.pack("d", default_timer()) + data

    # Calculate the checksum on the data and the dummy header.
    my_checksum = checksum(header + data)

    # Now that we have the right checksum, we put that in. It's just easier
    # to make up a new header than to stuff it into the dummy.
    header = struct.pack(
        "bbHHh", ICMP_ECHO_REQUEST, 0, socket.htons(my_checksum), ID, 1
    )
    packet = header + data
    my_socket.sendto(packet, (dest_addr, 1)) # Don't know about the 1

def __init__(self, *args, **kwargs):
        super(VRRPInterfaceMonitorNetworkDevice, self).__init__(*args,
                                                                **kwargs)
        self.__is_active = True
        config = self.config
        if config.is_ipv6:
            family = socket.AF_INET6
            ether_type = ether.ETH_TYPE_IPV6
            mac_address = vrrp.vrrp_ipv6_src_mac_address(config.vrid)
        else:
            family = socket.AF_INET
            ether_type = ether.ETH_TYPE_IP
            mac_address = vrrp.vrrp_ipv4_src_mac_address(config.vrid)
        # socket module doesn't define IPPROTO_VRRP
        self.ip_socket = socket.socket(family, socket.SOCK_RAW,
                                       inet.IPPROTO_VRRP)

        self.packet_socket = socket.socket(socket.AF_PACKET, socket.SOCK_RAW,
                                           socket.htons(ether_type))
        self.packet_socket.bind((self.interface.device_name, ether_type,
                                 socket.PACKET_MULTICAST,
                                 arp.ARP_HW_TYPE_ETHERNET,
                                 addrconv.mac.text_to_bin(mac_address)))

        self.ifindex = if_nametoindex(self.interface.device_name)

def __send_icmp_request(self, icmp_socket, dest_addr, packet_id, sequence):

        # ICMP Header :
        # -------------------------------------------------------------------
        # | type(8) | code(8) | checksum(16) | packet_id(16) | sequence(16) |
        # -------------------------------------------------------------------
        #
        packet_checksum = 0

        header = struct.pack('bbHHh', ICMP_ECHO_REQUEST, 0, packet_checksum, packet_id, sequence)
        packet_bytes = struct.calcsize('d')

        data = (128 - packet_bytes) * '0'
        data = struct.pack('d', time.time()) + data

        packet_checksum = self.__checksum(header + data)

        header = struct.pack('bbHHh', ICMP_ECHO_REQUEST, 0, socket.htons(packet_checksum), packet_id, sequence)
        packet = header + data
        icmp_socket.sendto(packet, (dest_addr, 1))

def send_one_ping(my_socket, dest_addr, ID):
    """
    Send one ping to the given >dest_addr<.
    """
    dest_addr  =  socket.gethostbyname(dest_addr)

    # Header is type (8), code (8), checksum (16), id (16), sequence (16)
    my_checksum = 0

    # Make a dummy heder with a 0 checksum.
    header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, my_checksum, ID, 1)
    bytesInDouble = struct.calcsize("d")
    data = (192 - bytesInDouble) * "Q"
    data = struct.pack("d", default_timer()) + data

    # Calculate the checksum on the data and the dummy header.
    my_checksum = checksum(header + data)

    # Now that we have the right checksum, we put that in. It's just easier
    # to make up a new header than to stuff it into the dummy.
    header = struct.pack(
        "bbHHh", ICMP_ECHO_REQUEST, 0, socket.htons(my_checksum), ID, 1
    )
    packet = header + data
    my_socket.sendto(packet, (dest_addr, 1)) # Don't know about the 1

def startServer(self, componentType, cid, gus, targetIP, trycount = 1, timeout = 1):
        """
        """
        msg = Define.BytesIO()
        msg.write( struct.pack("=H", MachineInterface_startserver ) ) # command
        msg.write( struct.pack("=H", struct.calcsize("=iiQhH") ) ) # command length
        msg.write( struct.pack("=i", self.uid) )
        msg.write( struct.pack("=i", componentType) )
        msg.write( struct.pack("=Q", cid) )
        msg.write( struct.pack("=h", gus) )
        msg.write( struct.pack("=H", socket.htons(self.replyPort)) ) # reply port

        if trycount <= 0:
            self.send( msg.getvalue(), targetIP )
            self.receiveReply()
        else:
            self.sendAndReceive( msg.getvalue(), targetIP, trycount, timeout )

def __init__(self, interface_name, on_ip_incoming, on_ip_outgoing):

        self.interface_name = interface_name
        self.on_ip_incoming = on_ip_incoming
        self.on_ip_outgoing = on_ip_outgoing

        # The raw in (listen) socket is a L2 raw socket that listens
        # for all packets going through a specific interface.
        # SOL_SOCKET: SO_LINGER, SO_RCVBUF, SO_SNDBUF, TCP_NODELAY
        # SO_LINGER ???????????????????TIME_WAIT?????
        # ????????????????????tcp??
        # SO_RCVBUF?SO_SNDBUF ????????????????
        # SO_SNDBUF ?? MSS??????? 2MSS
        # TCP_NODELAY  ?? nagle ??
        self.sock = socket.socket(
            socket.AF_PACKET, socket.SOCK_RAW, socket.htons(ETH_P_IP))
        self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 2 ** 30)
        self.sock.bind((self.interface_name, ETH_P_IP))

def __init__(self, *args, **kwargs):
        super(VRRPInterfaceMonitorNetworkDevice, self).__init__(*args,
                                                                **kwargs)
        self.__is_active = True
        config = self.config
        if config.is_ipv6:
            family = socket.AF_INET6
            ether_type = ether.ETH_TYPE_IPV6
            mac_address = vrrp.vrrp_ipv6_src_mac_address(config.vrid)
        else:
            family = socket.AF_INET
            ether_type = ether.ETH_TYPE_IP
            mac_address = vrrp.vrrp_ipv4_src_mac_address(config.vrid)
        # socket module doesn't define IPPROTO_VRRP
        self.ip_socket = socket.socket(family, socket.SOCK_RAW,
                                       inet.IPPROTO_VRRP)

        self.packet_socket = socket.socket(socket.AF_PACKET, socket.SOCK_RAW,
                                           socket.htons(ether_type))
        self.packet_socket.bind((self.interface.device_name, ether_type,
                                 socket.PACKET_MULTICAST,
                                 arp.ARP_HW_TYPE_ETHERNET,
                                 addrconv.mac.text_to_bin(mac_address)))

        self.ifindex = if_nametoindex(self.interface.device_name)

def send_ping(self, sock, ID):
    """
    Send ping to the target host
    """
    target_addr = socket.gethostbyname(self.target_host)

    my_checksum = 0

    # Create a dummy heder with a 0 checksum.
    header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, my_checksum, ID, 1)
    bytes_In_double = struct.calcsize("d")
    data = (192 - bytes_In_double) * "Q"
    data = struct.pack("d", time.time()) + data

    # Get the Checksum on the data and the dummy header.
    my_checksum = self.do_checksum(header + data)
    header = struct.pack( "bbHHh", ICMP_ECHO_REQUEST, 0, socket.htons(my_checksum), ID, 1 )
    packet = header + data
    sock.sendto(packet, (target_addr, 1))

def send_one_ping(my_socket, dest_addr, ID):
    """
    Send one ping to the given >dest_addr<.
    """
    dest_addr  =  socket.gethostbyname(dest_addr)

    # Header is type (8), code (8), checksum (16), id (16), sequence (16)
    my_checksum = 0

    # Make a dummy heder with a 0 checksum.
    header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, my_checksum, ID, 1)  #?
    #a1 = struct.unpack("bbHHh",header)    #my test
    bytesInDouble = struct.calcsize("d")
    data = (192 - bytesInDouble) * "Q"
    data = struct.pack("d", time.time()) + data

    # Calculate the checksum on the data and the dummy header.
    my_checksum = checksum(header + data)

    # Now that we have the right checksum, we put that in. It's just easier
    # to make up a new header than to stuff it into the dummy.
    header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, socket.htons(my_checksum), ID, 1)
    packet = header + data
    my_socket.sendto(packet, (dest_addr, 1)) # Don't know about the 1

def __init__(self, *args, **kwargs):
        super(SocketSniffer, self).__init__(*args, **kwargs)
        try:
            self.sock = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(ETH_P_ALL))
            if self.interface:
                self.sock.bind((self.interface, ETH_P_ALL))
        except Exception as e:
            abort('Socket could not be created: {}'.format(e))

def parse_CAddress(vds):
  d = {}
  d['nVersion'] = vds.read_int32()
  d['nTime'] = vds.read_uint32()
  d['nServices'] = vds.read_uint64()
  d['pchReserved'] = vds.read_bytes(12)
  d['ip'] = socket.inet_ntoa(vds.read_bytes(4))
  d['port'] = socket.htons(vds.read_uint16())
  return d

def parse_CAddress(vds):
  d = {}
  d['nVersion'] = vds.read_int32()
  d['nTime'] = vds.read_uint32()
  d['nServices'] = vds.read_uint64()
  d['pchReserved'] = vds.read_bytes(12)
  d['ip'] = socket.inet_ntoa(vds.read_bytes(4))
  d['port'] = socket.htons(vds.read_uint16())
  return d

def pack(self):
        ver_ihl = (self.version << 4) + self.ihl
        flags_offset = (self.flags << 13) + self.offset
        ip_header = struct.pack("!BBHHHBBH4s4s",
                    ver_ihl,
                    self.tos,
                    self.tl,
                    self.id,
                    flags_offset,
                    self.ttl,
                    self.protocol,
                    self.checksum,
                    self.source,
                    self.destination)
        self.checksum = checksum(ip_header)
        ip_header = struct.pack("!BBHHHBBH4s4s",
                    ver_ihl,
                    self.tos,
                    self.tl,
                    self.id,
                    flags_offset,
                    self.ttl,
                    self.protocol,
                    socket.htons(self.checksum),
                    self.source,
                    self.destination)  
        return ip_header

def __init__(self, type = ETH_P_IP, filter=None, iface=None, promisc=None, nofilter=0):
        self.outs = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_RAW)
        self.outs.setsockopt(socket.SOL_IP, socket.IP_HDRINCL, 1)
        self.ins = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(type))
        if iface is not None:
            self.ins.bind((iface, type))

def __init__(self, type = ETH_P_ALL, filter=None, promisc=None, iface=None, nofilter=0):
        self.type = type
        self.ins = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(type))
        self.ins.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 0)
        _flush_fd(self.ins)
        if iface:
            self.ins.bind((iface, type))
        if not nofilter:
            if conf.except_filter:
                if filter:
                    filter = "(%s) and not (%s)" % (filter, conf.except_filter)
                else:
                    filter = "not (%s)" % conf.except_filter
            if filter is not None:
                attach_filter(self.ins, filter)
        self.ins.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 2**30)
        self.outs = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(type))
        self.outs.setsockopt(socket.SOL_SOCKET, socket.SO_SNDBUF, 2**30)
        if promisc is None:
            promisc = conf.promisc
        self.promisc = promisc
        if self.promisc:
            if iface is None:
                self.iff = get_if_list()
            else:
                if iface.__class__ is list:
                    self.iff = iface
                else:
                    self.iff = [iface]
            for i in self.iff:
                set_promisc(self.ins, i)

def __init__(self, iface = None, type = ETH_P_ALL, filter=None, nofilter=0):
        if iface is None:
            iface = conf.iface
        self.ins = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(type))
        self.ins.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 0)
        _flush_fd(self.ins)
        if not nofilter: 
            if conf.except_filter:
                if filter:
                    filter = "(%s) and not (%s)" % (filter, conf.except_filter)
                else:
                    filter = "not (%s)" % conf.except_filter
            if filter is not None:
                attach_filter(self.ins, filter)
        self.ins.bind((iface, type))
        self.ins.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 2**30)
        self.outs = self.ins
        self.outs.setsockopt(socket.SOL_SOCKET, socket.SO_SNDBUF, 2**30)
        sa_ll = self.outs.getsockname()
        if sa_ll[3] in conf.l2types:
            self.LL = conf.l2types[sa_ll[3]]
        elif sa_ll[1] in conf.l3types:
            self.LL = conf.l3types[sa_ll[1]]
        else:
            self.LL = conf.default_l2
            warning("Unable to guess type (interface=%s protocol=%#x family=%i). Using %s" % (sa_ll[0],sa_ll[1],sa_ll[3],self.LL.name))

def __init__(self, iface = None, type = ETH_P_ALL, promisc=None, filter=None, nofilter=0):
        self.type = type
        self.outs = None
        self.ins = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(type))
        self.ins.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 0)
        _flush_fd(self.ins)
        if iface is not None:
            self.ins.bind((iface, type))
        if not nofilter:
            if conf.except_filter:
                if filter:
                    filter = "(%s) and not (%s)" % (filter, conf.except_filter)
                else:
                    filter = "not (%s)" % conf.except_filter
            if filter is not None:
                attach_filter(self.ins, filter)
        if promisc is None:
            promisc = conf.sniff_promisc
        self.promisc = promisc
        if iface is None:
            self.iff = get_if_list()
        else:
            if iface.__class__ is list:
                self.iff = iface
            else:
                self.iff = [iface]
        if self.promisc:
            for i in self.iff:
                set_promisc(self.ins, i)
        self.ins.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 2**30)

def __init__(self, type = ETH_P_IPV6, filter=None, iface=None, promisc=None, nofilter=0):
        L3RawSocket.__init__(self, type, filter, iface, promisc)
        # NOTE: if fragmentation is needed, it will be done by the kernel (RFC 2292)
        self.outs = socket.socket(socket.AF_INET6, socket.SOCK_RAW, socket.IPPROTO_RAW)
        self.ins = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(type))

def __init__(self, type = ETH_P_IP, filter=None, iface=None, promisc=None, nofilter=0):
        self.outs = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_RAW)
        self.outs.setsockopt(socket.SOL_IP, socket.IP_HDRINCL, 1)
        self.ins = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(type))
        if iface is not None:
            self.ins.bind((iface, type))

def __init__(self, type = ETH_P_ALL, filter=None, promisc=None, iface=None, nofilter=0):
        self.type = type
        self.ins = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(type))
        self.ins.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 0)
        _flush_fd(self.ins)
        if iface:
            self.ins.bind((iface, type))
        if not nofilter:
            if conf.except_filter:
                if filter:
                    filter = "(%s) and not (%s)" % (filter, conf.except_filter)
                else:
                    filter = "not (%s)" % conf.except_filter
            if filter is not None:
                attach_filter(self.ins, filter)
        self.ins.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 2**30)
        self.outs = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(type))
        self.outs.setsockopt(socket.SOL_SOCKET, socket.SO_SNDBUF, 2**30)
        if promisc is None:
            promisc = conf.promisc
        self.promisc = promisc
        if self.promisc:
            if iface is None:
                self.iff = get_if_list()
            else:
                if iface.__class__ is list:
                    self.iff = iface
                else:
                    self.iff = [iface]
            for i in self.iff:
                set_promisc(self.ins, i)

def __init__(self, iface = None, type = ETH_P_ALL, filter=None, nofilter=0):
        if iface is None:
            iface = conf.iface
        self.ins = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(type))
        self.ins.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 0)
        _flush_fd(self.ins)
        if not nofilter: 
            if conf.except_filter:
                if filter:
                    filter = "(%s) and not (%s)" % (filter, conf.except_filter)
                else:
                    filter = "not (%s)" % conf.except_filter
            if filter is not None:
                attach_filter(self.ins, filter)
        self.ins.bind((iface, type))
        self.ins.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 2**30)
        self.outs = self.ins
        self.outs.setsockopt(socket.SOL_SOCKET, socket.SO_SNDBUF, 2**30)
        sa_ll = self.outs.getsockname()
        if sa_ll[3] in conf.l2types:
            self.LL = conf.l2types[sa_ll[3]]
        elif sa_ll[1] in conf.l3types:
            self.LL = conf.l3types[sa_ll[1]]
        else:
            self.LL = conf.default_l2
            warning("Unable to guess type (interface=%s protocol=%#x family=%i). Using %s" % (sa_ll[0],sa_ll[1],sa_ll[3],self.LL.name))