1. 需要按照scapy。

不同系统可能名字不同，在ubuntu上包名是python3-scapy。来自网络，精简到只有发现dhcp服务器功能。

#!/usr/bin/env python

# encoding: utf-8

from __future__ import print_function

"""

test_dhcp

"""

from scapy.all import (

    Ether, IP, TCP, UDP, DNS, DNSQR, BOOTP, DHCP,

    sr, sr1, srp, srp1,

    srloop, srploop,

    make_table,

    wireshark,

    get_if_raw_hwaddr,

    sniff

    )

def test_dhcp():

    """

    from scapy/docs/usage

    """

    from scapy.all import conf

    conf.checkIPaddr =False

    iface = conf.iface

    fam, hw = get_if_raw_hwaddr(iface)

    dhcp_discover = (

        Ether(dst="ff:ff:ff:ff:ff:ff") /

        IP(src="0.0.0.0", dst="255.255.255.255") /

        UDP(sport=68, dport=67) /

        BOOTP(chaddr=hw) /

        DHCP(options=[("message-type","discover"),"end"])

    )

    ans, unans = srp(dhcp_discover, multi=True, timeout=10, iface=iface)

    for p in ans:

        print("=", p[1][Ether].src, p[1][IP].src, "=")

def main():

    test_dhcp()

if __name__ == "__main__":

    main()