/** Fetch the ICMP header checksum. */
public int getICMPChecksum() {
return ArrayHelper.extractInteger(_bytes, _ipOffset + ICMP_CSUM_POS, ICMP_CSUM_LEN);
}
/** Fetch the ICMP message subcode. */
public int getMessageMinorCode() {
return ArrayHelper.extractInteger(_bytes, _ipOffset + ICMP_CODE_POS + 1, ICMP_CODE_LEN);
}