check if input is a valid ipv6 address concode_field_sep Matcher mWhitelistHostnameMatcher concode_elem_sep String IPV6_REGEX concode_elem_sep Pattern mTcpdumpHostnamePattern concode_elem_sep Pattern mHostnamePattern concode_elem_sep Pattern hostsParserPattern concode_elem_sep Matcher mIPv4Matcher concode_elem_sep Matcher mTcpdumpHostnameMatcher concode_elem_sep String SIMPLE_IPV6_REGEX concode_elem_sep Matcher mIPv6Matcher concode_elem_sep Matcher mHostnameMatcher concode_elem_sep String TCPDUMP_HOSTNAME_REGEX concode_elem_sep String IPV4_REGEX concode_elem_sep Pattern mIPv6Pattern concode_elem_sep String HOSTS_PARSER_WHITELIST_IMPORT concode_elem_sep Pattern hostsParserWhitelistImportPattern concode_elem_sep String WHITELIST_HOSTNAME_REGEX concode_elem_sep Pattern mIPv4Pattern concode_elem_sep String HOSTS_PARSER concode_elem_sep String HOSTNAME_REGEX concode_elem_sep Pattern mWhitelistHostnamePattern concode_field_sep boolean isValidHostname concode_elem_sep boolean isValidIP concode_elem_sep boolean isValidWhitelistHostname concode_elem_sep String getTcpdumpHostname concode_elem_sep boolean isValidIPv4 concode_elem_sep boolean isValidUrl concode_elem_sep String wildcardToRegex