pf::util::dhcp - DHCP related utilities
DHCP related functions necessary to analyze DHCP traffic.
Parses a raw Ethernet frame and decompose it into layers and returns every layer as objects (l2, l3, l4) or hashref (dhcp).
Parses raw UDP packet and create an hashref with all the properties of DHCP.
We throw exceptions here on decoding failures.
Parses the Options portion of a DHCP packet and populate the hashref passed as a parameter.
We try to be as clever as possible regarding how data should be formatted and we convert it to appropriate types.
decode_dhcp_options( hashref, @options )
Returns a one-liner string representing most important information about DHCP Packet hashref passed.
Parses Relay Agent Information (option 82) and add information understood to the dhcp hashref. Relay Agent Information is defined in RFC3046.
On cisco, option 82 can be populated on the layer 3 switch when relaying by entering the following commands:
conf t
ip dhcp relay information option
create the pcap filter from the supported DHCP Messages Type
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