// NewDNSResolverImpl constructs a new DNS resolver object that utilizes the
// provided list of DNS servers for resolution.
func NewDNSResolverImpl(readTimeout time.Duration, servers []string, stats metrics.Scope) *DNSResolverImpl {
dnsClient := new(dns.Client)
// Set timeout for underlying net.Conn
dnsClient.ReadTimeout = readTimeout
dnsClient.Net = "tcp"
return &DNSResolverImpl{
DNSClient: dnsClient,
Servers: servers,
allowRestrictedAddresses: false,
stats: stats,
txtStats: stats.NewScope("TXT"),
aStats: stats.NewScope("A"),
caaStats: stats.NewScope("CAA"),
mxStats: stats.NewScope("MX"),
}
}
// NewDNSResolverImpl constructs a new DNS resolver object that utilizes the
// provided list of DNS servers for resolution.
func NewDNSResolverImpl(readTimeout time.Duration, servers []string, stats metrics.Scope, clk clock.Clock, maxTries int) *DNSResolverImpl {
// TODO(jmhodges): make constructor use an Option func pattern
dnsClient := new(dns.Client)
// Set timeout for underlying net.Conn
dnsClient.ReadTimeout = readTimeout
dnsClient.Net = "tcp"
return &DNSResolverImpl{
DNSClient: dnsClient,
Servers: servers,
allowRestrictedAddresses: false,
maxTries: maxTries,
clk: clk,
stats: stats,
txtStats: stats.NewScope("TXT"),
aStats: stats.NewScope("A"),
caaStats: stats.NewScope("CAA"),
mxStats: stats.NewScope("MX"),
}
}