sig_class_id: Classification ID
sig_class_name: Classification Name
Signature alert classification information.
iphdr
tcphdr
udphdr
icmphdr
data
data_payload: Packet Payload
When the protocol in the rule is TCP, data_payload contains the content after the TCP segment.
When the protocol in the rule is ICMP, data_payload contains the value of the data field in the ICMP protocol.
opt
