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package forward
import (
"context"
"runtime"
"testing"
"time"
"github.com/coredns/coredns/plugin/pkg/dnstest"
"github.com/coredns/coredns/plugin/test"
"github.com/coredns/coredns/request"
"github.com/mholt/caddy"
"github.com/miekg/dns"
)
func TestProxyClose(t *testing.T) {
s := dnstest.NewServer(func(w dns.ResponseWriter, r *dns.Msg) {
ret := new(dns.Msg)
ret.SetReply(r)
w.WriteMsg(ret)
})
defer s.Close()
req := new(dns.Msg)
req.SetQuestion("example.org.", dns.TypeA)
state := request.Request{W: &test.ResponseWriter{}, Req: req}
ctx := context.TODO()
for i := 0; i < 100; i++ {
p := NewProxy(s.Addr, nil /* no TLS */)
p.start(hcDuration)
doneCnt := 0
doneCh := make(chan bool)
timeCh := time.After(10 * time.Second)
go func() {
p.connect(ctx, state, false, false)
doneCh <- true
}()
go func() {
p.connect(ctx, state, true, false)
doneCh <- true
}()
go func() {
p.close()
doneCh <- true
}()
go func() {
p.connect(ctx, state, false, false)
doneCh <- true
}()
go func() {
p.connect(ctx, state, true, false)
doneCh <- true
}()
for doneCnt < 5 {
select {
case <-doneCh:
doneCnt++
case <-timeCh:
t.Error("TestProxyClose is running too long, dumping goroutines:")
buf := make([]byte, 100000)
stackSize := runtime.Stack(buf, true)
t.Fatal(string(buf[:stackSize]))
}
}
if p.inProgress != 0 {
t.Errorf("unexpected query in progress")
}
if p.state != stopped {
t.Errorf("unexpected proxy state, expected %d, got %d", stopped, p.state)
}
}
}
func TestProxy(t *testing.T) {
s := dnstest.NewServer(func(w dns.ResponseWriter, r *dns.Msg) {
ret := new(dns.Msg)
ret.SetReply(r)
ret.Answer = append(ret.Answer, test.A("example.org. IN A 127.0.0.1"))
w.WriteMsg(ret)
})
defer s.Close()
c := caddy.NewTestController("dns", "forward . "+s.Addr)
f, err := parseForward(c)
if err != nil {
t.Errorf("Failed to create forwarder: %s", err)
}
f.OnStartup()
defer f.OnShutdown()
m := new(dns.Msg)
m.SetQuestion("example.org.", dns.TypeA)
rec := dnstest.NewRecorder(&test.ResponseWriter{})
if _, err := f.ServeDNS(context.TODO(), rec, m); err != nil {
t.Fatal("Expected to receive reply, but didn't")
}
if x := rec.Msg.Answer[0].Header().Name; x != "example.org." {
t.Errorf("Expected %s, got %s", "example.org.", x)
}
}
func TestProxyTLSFail(t *testing.T) {
// This is an udp/tcp test server, so we shouldn't reach it with TLS.
s := dnstest.NewServer(func(w dns.ResponseWriter, r *dns.Msg) {
ret := new(dns.Msg)
ret.SetReply(r)
ret.Answer = append(ret.Answer, test.A("example.org. IN A 127.0.0.1"))
w.WriteMsg(ret)
})
defer s.Close()
c := caddy.NewTestController("dns", "forward . tls://"+s.Addr)
f, err := parseForward(c)
if err != nil {
t.Errorf("Failed to create forwarder: %s", err)
}
f.OnStartup()
defer f.OnShutdown()
m := new(dns.Msg)
m.SetQuestion("example.org.", dns.TypeA)
rec := dnstest.NewRecorder(&test.ResponseWriter{})
if _, err := f.ServeDNS(context.TODO(), rec, m); err == nil {
t.Fatal("Expected *not* to receive reply, but got one")
}
}
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