mirror of https://github.com/kbandla/dpkt.git
54 lines
1.0 KiB
Python
54 lines
1.0 KiB
Python
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#!/usr/bin/env python
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import dnet
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from dpkt import dhcp
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from dpkt import udp
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from dpkt import ip
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from dpkt import ethernet
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sysintf = 'eth0'
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hw = dnet.eth(sysintf)
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intf = dnet.intf()
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# build a dhcp discover packet to request an ip
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d = dhcp.DHCP(
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chaddr = hw.get(),
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xid = 1337,
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op = dhcp.DHCPDISCOVER,
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opts = (
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(dhcp.DHCP_OP_REQUEST, ''),
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(dhcp.DHCP_OPT_REQ_IP, ''),
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(dhcp.DHCP_OPT_ROUTER, ''),
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(dhcp.DHCP_OPT_NETMASK, ''),
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(dhcp.DHCP_OPT_DNS_SVRS, '')
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)
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)
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# build udp packet
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u = udp.UDP(
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dport = 67,
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sport = 68,
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data = d
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)
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u.ulen = len(u)
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# build ip packet
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i = ip.IP(
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dst = dnet.ip_aton('255.255.255.255'),
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src = intf.get(sysintf)['addr'].ip,
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data = u,
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p = ip.IP_PROTO_UDP
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)
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i.len = len(i)
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# build ethernet frame
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e = ethernet.Ethernet(
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dst = dnet.ETH_ADDR_BROADCAST,
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src = hw.get(),
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data = i
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)
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# send the data out
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hw.send(str(e))
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