dns

Documentation

Index

• Variables
• func CheckDomainDNSReady(ctx context.Context, domain string, validCNAMEs []string) bool
• func FindNSServers(ctx context.Context, domain string) ([]*net.NS, error)
• func IpAddrsToIPs(ipAddrs []net.IPAddr) []net.IP
• func NSHosts(ns []*net.NS) []string
• func SameIPs(a, b []net.IP) bool
• type DNSRequest
• type DNSResponse
• type DirectResolver
  • func (r DirectResolver) LookupCNAME(ctx context.Context, domain string) (string, error)
  • func (r DirectResolver) LookupIPAddr(ctx context.Context, domain string) ([]net.IPAddr, error)
  • func (r DirectResolver) LookupNS(ctx context.Context, domain string) ([]*net.NS, error)
• type ErrCNAMEFound
  • func (e ErrCNAMEFound) CNAME() string
  • func (e ErrCNAMEFound) Error() string
• type ErrUnexpectedRequest
  • func (e ErrUnexpectedRequest) Error() string
• type MockResolver
  • func (r MockResolver) LookupCNAME(ctx context.Context, domain string) (string, error)
  • func (r MockResolver) LookupIPAddr(ctx context.Context, domain string) ([]net.IPAddr, error)
  • func (r MockResolver) LookupNS(ctx context.Context, domain string) ([]*net.NS, error)
• type Resolver
  • func DirectResolverAt(nsServer string) Resolver
• type RootResolver
  • func (r RootResolver) LookupCNAME(ctx context.Context, domain string) (string, error)
  • func (r RootResolver) LookupIPAddr(ctx context.Context, domain string) ([]net.IPAddr, error)
  • func (r RootResolver) LookupNS(ctx context.Context, domain string) ([]*net.NS, error)

Variables

var ErrNoSuchHost = &net.DNSError{Err: "no such host", IsNotFound: true}

var (
	Logger logger = term.DefaultTerm
)

var ResolverAt = DirectResolverAt

Functions

func CheckDomainDNSReady

func CheckDomainDNSReady(ctx context.Context, domain string, validCNAMEs []string) bool

The DNS is considered ready if the CNAME of the domain is pointing to the ALB domain and in sync OR if the A record of the domain is pointing to the same IP addresses of the ALB domain and in sync

func FindNSServers

func FindNSServers(ctx context.Context, domain string) ([]*net.NS, error)

func IpAddrsToIPs

func IpAddrsToIPs(ipAddrs []net.IPAddr) []net.IP

func NSHosts

func NSHosts(ns []*net.NS) []string

func SameIPs

func SameIPs(a, b []net.IP) bool

Types

type DNSRequest

type DNSRequest struct {
	Type   string
	Domain string
}

type DNSResponse

type DNSResponse struct {
	Records []string
	Error   error
}

type DirectResolver

type DirectResolver struct {
	NSServer string
}

func (DirectResolver) LookupCNAME

func (r DirectResolver) LookupCNAME(ctx context.Context, domain string) (string, error)

func (DirectResolver) LookupIPAddr

func (r DirectResolver) LookupIPAddr(ctx context.Context, domain string) ([]net.IPAddr, error)

func (DirectResolver) LookupNS

func (r DirectResolver) LookupNS(ctx context.Context, domain string) ([]*net.NS, error)

type ErrCNAMEFound

type ErrCNAMEFound string

func (ErrCNAMEFound) CNAME

func (e ErrCNAMEFound) CNAME() string

func (ErrCNAMEFound) Error

func (e ErrCNAMEFound) Error() string

type ErrUnexpectedRequest

type ErrUnexpectedRequest DNSRequest

func (ErrUnexpectedRequest) Error

func (e ErrUnexpectedRequest) Error() string

type MockResolver

type MockResolver struct {
	Records map[DNSRequest]DNSResponse
}

func (MockResolver) LookupCNAME

func (r MockResolver) LookupCNAME(ctx context.Context, domain string) (string, error)

func (MockResolver) LookupIPAddr

func (r MockResolver) LookupIPAddr(ctx context.Context, domain string) ([]net.IPAddr, error)

func (MockResolver) LookupNS

func (r MockResolver) LookupNS(ctx context.Context, domain string) ([]*net.NS, error)

type Resolver

type Resolver interface {
	LookupIPAddr(ctx context.Context, domain string) ([]net.IPAddr, error)
	LookupCNAME(ctx context.Context, domain string) (string, error)
	LookupNS(ctx context.Context, domain string) ([]*net.NS, error)
}

func DirectResolverAt

func DirectResolverAt(nsServer string) Resolver

type RootResolver

type RootResolver struct{}

func (RootResolver) LookupCNAME

func (r RootResolver) LookupCNAME(ctx context.Context, domain string) (string, error)

func (RootResolver) LookupIPAddr

func (r RootResolver) LookupIPAddr(ctx context.Context, domain string) ([]net.IPAddr, error)

func (RootResolver) LookupNS

func (r RootResolver) LookupNS(ctx context.Context, domain string) ([]*net.NS, error)