CSVtoIPs takes a comma-separated string of IPs, and parses to a []net.IP.

NewDMProvider creates a DMProvider.

NewHandler creates a new Handler.

resolve domain name to ips (ipv4 + ipv6) using traditional udp+tcp, fixed 60s ttl.

EDNSSentinelValue is the value that when sent to Google as the EDNS value, means "do not use EDNS".

MaxBytesOfDNSName is the maximum number of bytes a DNS name may contain.

Use map to store cache, red-black tree to index cache.

DMProvider is the Google DNS-over-HTTPS provider; it implements the Provider interface, the abbreviation "DM" stands for dns-message.

DMProviderOptions is a configuration object for optional DMProvider configuration.

DNSQuestion represents a DNS question to be resolved by a DNS server.

DNSRR represents a DNS record, part of a response to a DNSQuestion.

Handler represents a DNS handler.

HandlerOptions specifies options to be used when instantiating a handler.

hosts contains known host entries.

JSONDNSResponse represents a response from the Google DNS-over-HTTPS servers.

RedBlackTreeExtended to demonstrate how to extend a RedBlackTree to include new functions.

Provider is an interface representing a service of DNS queries.

GDNSRRs represents an array of GDNSRR objects.