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package test
import (
"testing"
"github.com/miekg/dns"
"golang.org/x/net/context"
)
type Sect int
const (
Answer Sect = iota
Ns
Extra
)
type RRSet []dns.RR
func (p RRSet) Len() int { return len(p) }
func (p RRSet) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
func (p RRSet) Less(i, j int) bool { return p[i].String() < p[j].String() }
// If the TTL of a record is 303 we don't care what the TTL is.
type Case struct {
Qname string
Qtype uint16
Rcode int
Do bool
Answer []dns.RR
Ns []dns.RR
Extra []dns.RR
}
func (c Case) Msg() *dns.Msg {
m := new(dns.Msg)
m.SetQuestion(dns.Fqdn(c.Qname), c.Qtype)
if c.Do {
o := new(dns.OPT)
o.Hdr.Name = "."
o.Hdr.Rrtype = dns.TypeOPT
o.SetDo()
o.SetUDPSize(4096)
m.Extra = []dns.RR{o}
}
return m
}
func A(rr string) *dns.A { r, _ := dns.NewRR(rr); return r.(*dns.A) }
func AAAA(rr string) *dns.AAAA { r, _ := dns.NewRR(rr); return r.(*dns.AAAA) }
func CNAME(rr string) *dns.CNAME { r, _ := dns.NewRR(rr); return r.(*dns.CNAME) }
func SRV(rr string) *dns.SRV { r, _ := dns.NewRR(rr); return r.(*dns.SRV) }
func SOA(rr string) *dns.SOA { r, _ := dns.NewRR(rr); return r.(*dns.SOA) }
func NS(rr string) *dns.NS { r, _ := dns.NewRR(rr); return r.(*dns.NS) }
func PTR(rr string) *dns.PTR { r, _ := dns.NewRR(rr); return r.(*dns.PTR) }
func TXT(rr string) *dns.TXT { r, _ := dns.NewRR(rr); return r.(*dns.TXT) }
func MX(rr string) *dns.MX { r, _ := dns.NewRR(rr); return r.(*dns.MX) }
func RRSIG(rr string) *dns.RRSIG { r, _ := dns.NewRR(rr); return r.(*dns.RRSIG) }
func NSEC(rr string) *dns.NSEC { r, _ := dns.NewRR(rr); return r.(*dns.NSEC) }
func DNSKEY(rr string) *dns.DNSKEY { r, _ := dns.NewRR(rr); return r.(*dns.DNSKEY) }
func OPT(bufsize int, do bool) *dns.OPT {
o := new(dns.OPT)
o.Hdr.Name = "."
o.Hdr.Rrtype = dns.TypeOPT
o.SetVersion(0)
o.SetUDPSize(uint16(bufsize))
if do {
o.SetDo()
}
return o
}
func Header(t *testing.T, tc Case, resp *dns.Msg) bool {
if resp.Rcode != tc.Rcode {
t.Errorf("rcode is %q, expected %q", dns.RcodeToString[resp.Rcode], dns.RcodeToString[tc.Rcode])
return false
}
if len(resp.Answer) != len(tc.Answer) {
t.Errorf("answer for %q contained %d results, %d expected", tc.Qname, len(resp.Answer), len(tc.Answer))
return false
}
if len(resp.Ns) != len(tc.Ns) {
t.Errorf("authority for %q contained %d results, %d expected", tc.Qname, len(resp.Ns), len(tc.Ns))
return false
}
if len(resp.Extra) != len(tc.Extra) {
t.Errorf("additional for %q contained %d results, %d expected", tc.Qname, len(resp.Extra), len(tc.Extra))
return false
}
return true
}
func Section(t *testing.T, tc Case, sect Sect, rr []dns.RR) bool {
section := []dns.RR{}
switch sect {
case 0:
section = tc.Answer
case 1:
section = tc.Ns
case 2:
section = tc.Extra
}
for i, a := range rr {
if a.Header().Name != section[i].Header().Name {
t.Errorf("rr %d should have a Header Name of %q, but has %q", i, section[i].Header().Name, a.Header().Name)
return false
}
// 303 signals: don't care what the ttl is.
if section[i].Header().Ttl != 303 && a.Header().Ttl != section[i].Header().Ttl {
if _, ok := section[i].(*dns.OPT); !ok {
// we check edns0 bufize on this one
t.Errorf("rr %d should have a Header TTL of %d, but has %d", i, section[i].Header().Ttl, a.Header().Ttl)
return false
}
}
if a.Header().Rrtype != section[i].Header().Rrtype {
t.Errorf("rr %d should have a header rr type of %d, but has %d", i, section[i].Header().Rrtype, a.Header().Rrtype)
return false
}
switch x := a.(type) {
case *dns.SRV:
if x.Priority != section[i].(*dns.SRV).Priority {
t.Errorf("rr %d should have a Priority of %d, but has %d", i, section[i].(*dns.SRV).Priority, x.Priority)
return false
}
if x.Weight != section[i].(*dns.SRV).Weight {
t.Errorf("rr %d should have a Weight of %d, but has %d", i, section[i].(*dns.SRV).Weight, x.Weight)
return false
}
if x.Port != section[i].(*dns.SRV).Port {
t.Errorf("rr %d should have a Port of %d, but has %d", i, section[i].(*dns.SRV).Port, x.Port)
return false
}
if x.Target != section[i].(*dns.SRV).Target {
t.Errorf("rr %d should have a Target of %q, but has %q", i, section[i].(*dns.SRV).Target, x.Target)
return false
}
case *dns.RRSIG:
if x.TypeCovered != section[i].(*dns.RRSIG).TypeCovered {
t.Errorf("rr %d should have a TypeCovered of %d, but has %d", i, section[i].(*dns.RRSIG).TypeCovered, x.TypeCovered)
return false
}
if x.Labels != section[i].(*dns.RRSIG).Labels {
t.Errorf("rr %d should have a Labels of %d, but has %d", i, section[i].(*dns.RRSIG).Labels, x.Labels)
return false
}
if x.SignerName != section[i].(*dns.RRSIG).SignerName {
t.Errorf("rr %d should have a SignerName of %d, but has %d", i, section[i].(*dns.RRSIG).SignerName, x.SignerName)
return false
}
case *dns.NSEC:
if x.NextDomain != section[i].(*dns.NSEC).NextDomain {
t.Errorf("rr %d should have a NextDomain of %d, but has %d", i, section[i].(*dns.NSEC).NextDomain, x.NextDomain)
return false
}
// TypeBitMap
case *dns.A:
if x.A.String() != section[i].(*dns.A).A.String() {
t.Errorf("rr %d should have a Address of %q, but has %q", i, section[i].(*dns.A).A.String(), x.A.String())
return false
}
case *dns.AAAA:
if x.AAAA.String() != section[i].(*dns.AAAA).AAAA.String() {
t.Errorf("rr %d should have a Address of %q, but has %q", i, section[i].(*dns.AAAA).AAAA.String(), x.AAAA.String())
return false
}
case *dns.TXT:
for j, txt := range x.Txt {
if txt != section[i].(*dns.TXT).Txt[j] {
t.Errorf("rr %d should have a Txt of %q, but has %q", i, section[i].(*dns.TXT).Txt[j], txt)
return false
}
}
case *dns.SOA:
tt := section[i].(*dns.SOA)
if x.Ns != tt.Ns {
t.Errorf("SOA nameserver should be %q, but is %q", x.Ns, tt.Ns)
return false
}
case *dns.PTR:
tt := section[i].(*dns.PTR)
if x.Ptr != tt.Ptr {
t.Errorf("PTR ptr should be %q, but is %q", x.Ptr, tt.Ptr)
return false
}
case *dns.CNAME:
tt := section[i].(*dns.CNAME)
if x.Target != tt.Target {
t.Errorf("CNAME target should be %q, but is %q", x.Target, tt.Target)
return false
}
case *dns.MX:
tt := section[i].(*dns.MX)
if x.Mx != tt.Mx {
t.Errorf("MX Mx should be %q, but is %q", x.Mx, tt.Mx)
return false
}
if x.Preference != tt.Preference {
t.Errorf("MX Preference should be %q, but is %q", x.Preference, tt.Preference)
return false
}
case *dns.NS:
tt := section[i].(*dns.NS)
if x.Ns != tt.Ns {
t.Errorf("NS nameserver should be %q, but is %q", x.Ns, tt.Ns)
return false
}
case *dns.OPT:
tt := section[i].(*dns.OPT)
if x.UDPSize() != tt.UDPSize() {
t.Errorf("OPT UDPSize should be %d, but is %d", tt.UDPSize(), x.UDPSize())
return false
}
if x.Do() != tt.Do() {
t.Errorf("OPT DO should be %t, but is %t", tt.Do(), x.Do())
return false
}
}
}
return true
}
func ErrorHandler() Handler {
return HandlerFunc(func(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
m := new(dns.Msg)
m.SetRcode(r, dns.RcodeServerFailure)
w.WriteMsg(m)
return dns.RcodeServerFailure, nil
})
}
// Copied here to prevent an import cycle.
type (
// HandlerFunc is a convenience type like dns.HandlerFunc, except
// ServeDNS returns an rcode and an error.
HandlerFunc func(context.Context, dns.ResponseWriter, *dns.Msg) (int, error)
Handler interface {
ServeDNS(context.Context, dns.ResponseWriter, *dns.Msg) (int, error)
}
)
// ServeDNS implements the Handler interface.
func (f HandlerFunc) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
return f(ctx, w, r)
}
|
