Question

ip a output screenshot我正在尝试创建一个扫描局域网的脚本，并使用Python获取所有机器的IP地址和mac地址。下面的脚本执行此操作，但是它会打印两次列表吗？如何实现这一目标，或者如何更改下面的脚本以打印列表一次（作为字典，其中ip地址是键，mac是值）？

from __future__ import absolute_import, division, print_function
import logging
import scapy.config
import scapy.layers.l2
import scapy.route
import socket
import math
import errno

logging.basicConfig(format='%(asctime)s %(levelname)-5s %(message)s', datefmt='%Y-%m-%d %H:%M:%S', level=logging.DEBUG)
logger = logging.getLogger(__name__)


def long2net(arg):
    if (arg <= 0 or arg >= 0xFFFFFFFF):
        raise ValueError("illegal netmask value", hex(arg))
    return 32 - int(round(math.log(0xFFFFFFFF - arg, 2)))


def to_CIDR_notation(bytes_network, bytes_netmask):
    network = scapy.utils.ltoa(bytes_network)
    netmask = long2net(bytes_netmask)
    net = "%s/%s" % (network, netmask)
    if netmask < 16:
        logger.warn("%s is too big. skipping" % net)
        return None

    return net


def scan_and_print_neighbors(net, interface, timeout=1):
    logger.info("arping %s on %s" % (net, interface))
    try:
        ans, unans = scapy.layers.l2.arping(net, iface=interface, timeout=timeout, verbose=True)
        for s, r in ans.res:
            line = r.sprintf("%Ether.src%  %ARP.psrc%")
            try:
                hostname = socket.gethostbyaddr(r.psrc)
                line += " " + hostname[0]
            except socket.herror:
                # failed to resolve
                pass
            logger.info(line)
    except socket.error as e:
        if e.errno == errno.EPERM:     # Operation not permitted
            logger.error("%s. Did you run as root?", e.strerror)
        else:
            raise


if __name__ == "__main__":
    for network, netmask, _, interface, address in scapy.config.conf.route.routes:

        # skip loopback network and default gw
        if network == 0 or interface == 'lo' or address == '127.0.0.1' or address == '0.0.0.0':
            continue

        if netmask <= 0 or netmask == 0xFFFFFFFF:
            continue

        net = to_CIDR_notation(network, netmask)

        if interface != scapy.config.conf.iface:
            # see http://trac.secdev.org/scapy/ticket/537
            logger.warn("skipping %s because scapy currently doesn't support arping on non-primary network interfaces", net)
            continue

        if net:
            scan_and_print_neighbors(net, interface)

Answer 1

您是否尝试过将verbose设为False？

ans, unans = scapy.layers.l2.arping(net, iface=interface, timeout=timeout, verbose=False)

除了在verbose=False中设置scapy.layers.l2.arping(之外，导入conf模块：

from scapy.all import conf

在conf.verb=0行下面添加if __name__ == "__main__":：

if __name__ == "__main__":
    conf.verb=0
    for network, netmask, _, interface, address in scapy.config.conf.route.routes:

        # skip loopback network and default gw
        if network == 0 or interface == 'lo' or address == '127.0.0.1' or address == '0.0.0.0':
            continue

编辑：我认为您的脚本为/proc/net/route中定义的尚未明确过滤掉的每条“路线”循环一次（即{{1我的猜测是，如果你在哪里执行continue，你可能会在那里找到2条路线，它们在某种程度上具有相同的网络和接口值，但其他东西与网络掩码或网关不同。

无论如何，通过这种方法来解决这个问题的方法是在调用route -n之后添加break以退出for循环。

例如：

scan_and_print_neighbors(net, interface)

Python扫描网络IP地址和mac

1 个答案: