132 lines
3.2 KiB
Go
132 lines
3.2 KiB
Go
package dnsfilter
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import (
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"context"
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"fmt"
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"io/ioutil"
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"net"
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"os"
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"testing"
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"github.com/coredns/coredns/plugin"
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"github.com/coredns/coredns/plugin/pkg/dnstest"
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"github.com/coredns/coredns/plugin/test"
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"github.com/mholt/caddy"
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"github.com/miekg/dns"
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)
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func TestSetup(t *testing.T) {
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for i, testcase := range []struct {
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config string
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failing bool
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}{
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{`dnsfilter`, false},
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{`dnsfilter {
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filter 0 /dev/nonexistent/abcdef
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}`, true},
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{`dnsfilter {
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filter 0 ../tests/dns.txt
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}`, false},
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{`dnsfilter {
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safebrowsing
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filter 0 ../tests/dns.txt
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}`, false},
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{`dnsfilter {
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parental
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filter 0 ../tests/dns.txt
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}`, true},
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} {
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c := caddy.NewTestController("dns", testcase.config)
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err := setup(c)
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if err != nil {
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if !testcase.failing {
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t.Fatalf("Test #%d expected no errors, but got: %v", i, err)
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}
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continue
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}
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if testcase.failing {
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t.Fatalf("Test #%d expected to fail but it didn't", i)
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}
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}
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}
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func TestEtcHostsFilter(t *testing.T) {
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text := []byte("127.0.0.1 doubleclick.net\n" + "127.0.0.1 example.org example.net www.example.org www.example.net")
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tmpfile, err := ioutil.TempFile("", "")
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if err != nil {
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t.Fatal(err)
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}
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if _, err = tmpfile.Write(text); err != nil {
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t.Fatal(err)
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}
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if err = tmpfile.Close(); err != nil {
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t.Fatal(err)
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}
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defer os.Remove(tmpfile.Name())
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configText := fmt.Sprintf("dnsfilter {\nfilter 0 %s\n}", tmpfile.Name())
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c := caddy.NewTestController("dns", configText)
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p, err := setupPlugin(c)
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if err != nil {
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t.Fatal(err)
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}
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p.Next = zeroTTLBackend()
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ctx := context.TODO()
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for _, testcase := range []struct {
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host string
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filtered bool
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}{
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{"www.doubleclick.net", false},
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{"doubleclick.net", true},
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{"www2.example.org", false},
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{"www2.example.net", false},
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{"test.www.example.org", false},
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{"test.www.example.net", false},
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{"example.org", true},
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{"example.net", true},
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{"www.example.org", true},
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{"www.example.net", true},
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} {
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req := new(dns.Msg)
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req.SetQuestion(testcase.host+".", dns.TypeA)
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resp := test.ResponseWriter{}
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rrw := dnstest.NewRecorder(&resp)
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rcode, err := p.ServeDNS(ctx, rrw, req)
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if err != nil {
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t.Fatalf("ServeDNS returned error: %s", err)
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}
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if rcode != rrw.Rcode {
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t.Fatalf("ServeDNS return value for host %s has rcode %d that does not match captured rcode %d", testcase.host, rcode, rrw.Rcode)
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}
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A, ok := rrw.Msg.Answer[0].(*dns.A)
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if !ok {
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t.Fatalf("Host %s expected to have result A", testcase.host)
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}
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ip := net.IPv4(127, 0, 0, 1)
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filtered := ip.Equal(A.A)
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if testcase.filtered && testcase.filtered != filtered {
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t.Fatalf("Host %s expected to be filtered, instead it is not filtered", testcase.host)
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}
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if !testcase.filtered && testcase.filtered != filtered {
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t.Fatalf("Host %s expected to be not filtered, instead it is filtered", testcase.host)
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}
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}
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}
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func zeroTTLBackend() plugin.Handler {
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return plugin.HandlerFunc(func(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
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m := new(dns.Msg)
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m.SetReply(r)
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m.Response, m.RecursionAvailable = true, true
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m.Answer = []dns.RR{test.A("example.org. 0 IN A 127.0.0.53")}
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w.WriteMsg(m)
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return dns.RcodeSuccess, nil
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})
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}
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