#value_indexed
ICMP_ECHOREPLY		0
ICMP_DEST_UNREACH	3
ICMP_SOURCE_QUENCH	4
ICMP_REDIRECT		5
ICMP_ECHO		8
ICMP_TIME_EXCEEDED	11
ICMP_PARAMETERPROB	12
ICMP_TIMESTAMP		13
ICMP_TIMESTAMPREPLY	14
ICMP_INFO_REQUEST	15
ICMP_INFO_REPLY		16
ICMP_ADDRESS		17
ICMP_ADDRESSREPLY	18