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package cache
import (
"context"
"testing"
"time"
"github.com/coredns/coredns/plugin"
"github.com/coredns/coredns/plugin/pkg/response"
"github.com/coredns/coredns/plugin/test"
"github.com/miekg/dns"
)
type cacheTestCase struct {
test.Case
in test.Case
AuthenticatedData bool
Authoritative bool
RecursionAvailable bool
Truncated bool
shouldCache bool
}
var cacheTestCases = []cacheTestCase{
{
RecursionAvailable: true, AuthenticatedData: true, Authoritative: true,
Case: test.Case{
Qname: "miek.nl.", Qtype: dns.TypeMX,
Answer: []dns.RR{
test.MX("miek.nl. 3600 IN MX 1 aspmx.l.google.com."),
test.MX("miek.nl. 3600 IN MX 10 aspmx2.googlemail.com."),
},
},
in: test.Case{
Qname: "miek.nl.", Qtype: dns.TypeMX,
Answer: []dns.RR{
test.MX("miek.nl. 3601 IN MX 1 aspmx.l.google.com."),
test.MX("miek.nl. 3601 IN MX 10 aspmx2.googlemail.com."),
},
},
shouldCache: true,
},
{
RecursionAvailable: true, AuthenticatedData: true, Authoritative: true,
Case: test.Case{
Qname: "mIEK.nL.", Qtype: dns.TypeMX,
Answer: []dns.RR{
test.MX("mIEK.nL. 3600 IN MX 1 aspmx.l.google.com."),
test.MX("mIEK.nL. 3600 IN MX 10 aspmx2.googlemail.com."),
},
},
in: test.Case{
Qname: "mIEK.nL.", Qtype: dns.TypeMX,
Answer: []dns.RR{
test.MX("mIEK.nL. 3601 IN MX 1 aspmx.l.google.com."),
test.MX("mIEK.nL. 3601 IN MX 10 aspmx2.googlemail.com."),
},
},
shouldCache: true,
},
{
Truncated: true,
Case: test.Case{
Qname: "miek.nl.", Qtype: dns.TypeMX,
Answer: []dns.RR{test.MX("miek.nl. 1800 IN MX 1 aspmx.l.google.com.")},
},
in: test.Case{},
shouldCache: false,
},
{
RecursionAvailable: true, Authoritative: true,
Case: test.Case{
Rcode: dns.RcodeNameError,
Qname: "example.org.", Qtype: dns.TypeA,
Ns: []dns.RR{
test.SOA("example.org. 3600 IN SOA sns.dns.icann.org. noc.dns.icann.org. 2016082540 7200 3600 1209600 3600"),
},
},
in: test.Case{
Rcode: dns.RcodeNameError,
Qname: "example.org.", Qtype: dns.TypeA,
Ns: []dns.RR{
test.SOA("example.org. 3600 IN SOA sns.dns.icann.org. noc.dns.icann.org. 2016082540 7200 3600 1209600 3600"),
},
},
shouldCache: true,
},
{
RecursionAvailable: true, Authoritative: true,
Case: test.Case{
Qname: "miek.nl.", Qtype: dns.TypeMX,
Do: true,
Answer: []dns.RR{
test.MX("miek.nl. 3600 IN MX 1 aspmx.l.google.com."),
test.MX("miek.nl. 3600 IN MX 10 aspmx2.googlemail.com."),
test.RRSIG("miek.nl. 3600 IN RRSIG MX 8 2 1800 20160521031301 20160421031301 12051 miek.nl. lAaEzB5teQLLKyDenatmyhca7blLRg9DoGNrhe3NReBZN5C5/pMQk8Jc u25hv2fW23/SLm5IC2zaDpp2Fzgm6Jf7e90/yLcwQPuE7JjS55WMF+HE LEh7Z6AEb+Iq4BWmNhUz6gPxD4d9eRMs7EAzk13o1NYi5/JhfL6IlaYy qkc="),
},
},
in: test.Case{
Qname: "miek.nl.", Qtype: dns.TypeMX,
Do: true,
Answer: []dns.RR{
test.MX("miek.nl. 3600 IN MX 1 aspmx.l.google.com."),
test.MX("miek.nl. 3600 IN MX 10 aspmx2.googlemail.com."),
test.RRSIG("miek.nl. 1800 IN RRSIG MX 8 2 1800 20160521031301 20160421031301 12051 miek.nl. lAaEzB5teQLLKyDenatmyhca7blLRg9DoGNrhe3NReBZN5C5/pMQk8Jc u25hv2fW23/SLm5IC2zaDpp2Fzgm6Jf7e90/yLcwQPuE7JjS55WMF+HE LEh7Z6AEb+Iq4BWmNhUz6gPxD4d9eRMs7EAzk13o1NYi5/JhfL6IlaYy qkc="),
},
},
shouldCache: false,
},
{
RecursionAvailable: true, Authoritative: true,
Case: test.Case{
Qname: "example.org.", Qtype: dns.TypeMX,
Do: true,
Answer: []dns.RR{
test.MX("example.org. 3600 IN MX 1 aspmx.l.google.com."),
test.MX("example.org. 3600 IN MX 10 aspmx2.googlemail.com."),
test.RRSIG("example.org. 3600 IN RRSIG MX 8 2 1800 20170521031301 20170421031301 12051 miek.nl. lAaEzB5teQLLKyDenatmyhca7blLRg9DoGNrhe3NReBZN5C5/pMQk8Jc u25hv2fW23/SLm5IC2zaDpp2Fzgm6Jf7e90/yLcwQPuE7JjS55WMF+HE LEh7Z6AEb+Iq4BWmNhUz6gPxD4d9eRMs7EAzk13o1NYi5/JhfL6IlaYy qkc="),
},
},
in: test.Case{
Qname: "example.org.", Qtype: dns.TypeMX,
Do: true,
Answer: []dns.RR{
test.MX("example.org. 3600 IN MX 1 aspmx.l.google.com."),
test.MX("example.org. 3600 IN MX 10 aspmx2.googlemail.com."),
test.RRSIG("example.org. 1800 IN RRSIG MX 8 2 1800 20170521031301 20170421031301 12051 miek.nl. lAaEzB5teQLLKyDenatmyhca7blLRg9DoGNrhe3NReBZN5C5/pMQk8Jc u25hv2fW23/SLm5IC2zaDpp2Fzgm6Jf7e90/yLcwQPuE7JjS55WMF+HE LEh7Z6AEb+Iq4BWmNhUz6gPxD4d9eRMs7EAzk13o1NYi5/JhfL6IlaYy qkc="),
},
},
shouldCache: true,
},
}
func cacheMsg(m *dns.Msg, tc cacheTestCase) *dns.Msg {
m.RecursionAvailable = tc.RecursionAvailable
m.AuthenticatedData = tc.AuthenticatedData
m.Authoritative = tc.Authoritative
m.Rcode = tc.Rcode
m.Truncated = tc.Truncated
m.Answer = tc.in.Answer
m.Ns = tc.in.Ns
// m.Extra = tc.in.Extra don't copy Extra, because we don't care and fake EDNS0 DO with tc.Do.
return m
}
func newTestCache(ttl time.Duration) (*Cache, *ResponseWriter) {
c := New()
c.pttl = ttl
c.nttl = ttl
crr := &ResponseWriter{ResponseWriter: nil, Cache: c}
return c, crr
}
func TestCache(t *testing.T) {
now, _ := time.Parse(time.UnixDate, "Fri Apr 21 10:51:21 BST 2017")
utc := now.UTC()
c, crr := newTestCache(maxTTL)
for _, tc := range cacheTestCases {
m := tc.in.Msg()
m = cacheMsg(m, tc)
do := tc.in.Do
mt, _ := response.Typify(m, utc)
k := key(m, mt, do)
crr.set(m, k, mt, c.pttl)
name := plugin.Name(m.Question[0].Name).Normalize()
qtype := m.Question[0].Qtype
i, _ := c.get(time.Now().UTC(), name, qtype, do)
ok := i != nil
if ok != tc.shouldCache {
t.Errorf("cached message that should not have been cached: %s", name)
continue
}
if ok {
resp := i.toMsg(m, time.Now().UTC())
if !test.Header(t, tc.Case, resp) {
t.Logf("%v\n", resp)
continue
}
if !test.Section(t, tc.Case, test.Answer, resp.Answer) {
t.Logf("%v\n", resp)
}
if !test.Section(t, tc.Case, test.Ns, resp.Ns) {
t.Logf("%v\n", resp)
}
if !test.Section(t, tc.Case, test.Extra, resp.Extra) {
t.Logf("%v\n", resp)
}
}
}
}
func TestCacheZeroTTL(t *testing.T) {
c := New()
c.Next = zeroTTLBackend()
req := new(dns.Msg)
req.SetQuestion("example.org.", dns.TypeA)
ctx := context.TODO()
c.ServeDNS(ctx, &test.ResponseWriter{}, req)
if c.pcache.Len() != 0 {
t.Errorf("Msg with 0 TTL should not have been cached")
}
if c.ncache.Len() != 0 {
t.Errorf("Msg with 0 TTL should not have been cached")
}
}
func BenchmarkCacheResponse(b *testing.B) {
c := New()
c.prefetch = 1
c.Next = BackendHandler()
ctx := context.TODO()
reqs := make([]*dns.Msg, 5)
for i, q := range []string{"example1", "example2", "a", "b", "ddd"} {
reqs[i] = new(dns.Msg)
reqs[i].SetQuestion(q+".example.org.", dns.TypeA)
}
b.RunParallel(func(pb *testing.PB) {
i := 0
for pb.Next() {
req := reqs[i]
c.ServeDNS(ctx, &test.ResponseWriter{}, req)
i++
i = i % 5
}
})
}
func BackendHandler() plugin.Handler {
return plugin.HandlerFunc(func(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
m := new(dns.Msg)
m.SetReply(r)
m.Response = true
m.RecursionAvailable = true
owner := m.Question[0].Name
m.Answer = []dns.RR{test.A(owner + " 303 IN A 127.0.0.53")}
w.WriteMsg(m)
return dns.RcodeSuccess, nil
})
}
func zeroTTLBackend() plugin.Handler {
return plugin.HandlerFunc(func(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
m := new(dns.Msg)
m.SetReply(r)
m.Response, m.RecursionAvailable = true, true
m.Answer = []dns.RR{test.A("example.org. 0 IN A 127.0.0.53")}
w.WriteMsg(m)
return dns.RcodeSuccess, nil
})
}
|
