Not the real ICMP codes; here it's set up so that codes above 128 are informational
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// // Not the real ICMP codes; here it's set up so that codes above 128 are // informational // enum ICMPType { ICMP_DESTINATION_UNREACHABLE = 13; ICMP_REDIRECT = 5; ICMP_TIME_EXCEEDED = 11; ICMP_PARAMETER_PROBLEM = 12; ICMP_ECHO_REQUEST = 128; ICMP_ECHO_REPLY = 129; ICMP_TIMESTAMP_REQUEST = 130; ICMP_TIMESTAMP_REPLY = 131; }