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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576//go:build linux
package microvm
import ( "net" "testing"
"github.com/miekg/dns")
func TestFilterDNSResponseDropsBlockedAddressRecords(t *testing.T) { msg := new(dns.Msg) msg.Answer = []dns.RR{ &dns.CNAME{Hdr: dns.RR_Header{Name: "cache.example.", Rrtype: dns.TypeCNAME, Class: dns.ClassINET}, Target: "edge.example."}, &dns.A{Hdr: dns.RR_Header{Name: "edge.example.", Rrtype: dns.TypeA, Class: dns.ClassINET}, A: net.ParseIP("1.1.1.1")}, &dns.A{Hdr: dns.RR_Header{Name: "edge.example.", Rrtype: dns.TypeA, Class: dns.ClassINET}, A: net.ParseIP("10.0.0.1")}, &dns.AAAA{Hdr: dns.RR_Header{Name: "edge.example.", Rrtype: dns.TypeAAAA, Class: dns.ClassINET}, AAAA: net.ParseIP("2606:4700:4700::1111")}, &dns.AAAA{Hdr: dns.RR_Header{Name: "edge.example.", Rrtype: dns.TypeAAAA, Class: dns.ClassINET}, AAAA: net.ParseIP("fd7a:115c:a1e0::53")}, } msg.Extra = []dns.RR{ &dns.A{Hdr: dns.RR_Header{Name: "private.example.", Rrtype: dns.TypeA, Class: dns.ClassINET}, A: net.ParseIP("192.168.1.2")}, &dns.A{Hdr: dns.RR_Header{Name: "public.example.", Rrtype: dns.TypeA, Class: dns.ClassINET}, A: net.ParseIP("8.8.8.8")}, }
filterDNSResponse(msg)
if len(msg.Answer) != 3 { t.Fatalf("filtered answer len = %d, want 3: %#v", len(msg.Answer), msg.Answer) } if _, ok := msg.Answer[0].(*dns.CNAME); !ok { t.Fatalf("answer[0] = %T, want CNAME", msg.Answer[0]) } if a, ok := msg.Answer[1].(*dns.A); !ok || !a.A.Equal(net.ParseIP("1.1.1.1")) { t.Fatalf("answer[1] = %#v, want public A", msg.Answer[1]) } if aaaa, ok := msg.Answer[2].(*dns.AAAA); !ok || !aaaa.AAAA.Equal(net.ParseIP("2606:4700:4700::1111")) { t.Fatalf("answer[2] = %#v, want public AAAA", msg.Answer[2]) } if len(msg.Extra) != 1 { t.Fatalf("filtered extra len = %d, want 1: %#v", len(msg.Extra), msg.Extra) }}
func TestFilterDNSResponseFiltersSVCBAddressHints(t *testing.T) { msg := new(dns.Msg) msg.Answer = []dns.RR{ &dns.HTTPS{ SVCB: dns.SVCB{ Hdr: dns.RR_Header{Name: "svc.example.", Rrtype: dns.TypeHTTPS, Class: dns.ClassINET}, Priority: 1, Target: ".", Value: []dns.SVCBKeyValue{ &dns.SVCBIPv4Hint{Hint: []net.IP{net.ParseIP("10.0.0.1"), net.ParseIP("8.8.8.8")}}, &dns.SVCBIPv6Hint{Hint: []net.IP{net.ParseIP("fd7a:115c:a1e0::53"), net.ParseIP("2001:4860:4860::8888")}}, }, }, }, }
filterDNSResponse(msg)
https := msg.Answer[0].(*dns.HTTPS) if len(https.Value) != 2 { t.Fatalf("https values len = %d, want 2", len(https.Value)) } ipv4 := https.Value[0].(*dns.SVCBIPv4Hint) if len(ipv4.Hint) != 1 || !ipv4.Hint[0].Equal(net.ParseIP("8.8.8.8")) { t.Fatalf("ipv4 hints = %v, want [8.8.8.8]", ipv4.Hint) } ipv6 := https.Value[1].(*dns.SVCBIPv6Hint) if len(ipv6.Hint) != 1 || !ipv6.Hint[0].Equal(net.ParseIP("2001:4860:4860::8888")) { t.Fatalf("ipv6 hints = %v, want [2001:4860:4860::8888]", ipv6.Hint) }}