testing | dont be recursive for external domains | finalize oauth #5
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@ -1,4 +1,4 @@
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package dns
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package hcdns
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import (
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"database/sql"
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@ -9,7 +9,7 @@ import (
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"log"
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)
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const MAX_RECURSION = 10
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const MAX_RECURSION = 15
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func resolveInternalCNAMEs(dbConn *sql.DB, domain string, qtype uint16, maxDepth int) ([]dns.RR, error) {
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internalCnames, err := database.FindDNSRecords(dbConn, domain, "CNAME")
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@ -21,12 +21,14 @@ func resolveInternalCNAMEs(dbConn *sql.DB, domain string, qtype uint16, maxDepth
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for _, record := range internalCnames {
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cname, err := dns.NewRR(fmt.Sprintf("%s %d IN CNAME %s", record.Name, record.TTL, record.Content))
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if err != nil {
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log.Println(err)
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return nil, err
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}
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answers = append(answers, cname)
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cnameRecursive, err := resolveDNS(dbConn, record.Content, qtype, maxDepth-1)
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if err != nil {
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log.Println(err)
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return nil, err
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}
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answers = append(answers, cnameRecursive...)
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@ -62,11 +64,7 @@ func resolveDNS(dbConn *sql.DB, domain string, qtype uint16, maxDepth int) ([]dn
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return nil, err
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}
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if len(answers) > 0 {
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return answers, nil
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}
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return nil, fmt.Errorf("no records found for %s", domain)
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return answers, nil
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}
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type DnsHandler struct {
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@ -83,7 +81,9 @@ func (h *DnsHandler) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
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answers, err := resolveDNS(h.DbConn, question.Name, question.Qtype, MAX_RECURSION)
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if err != nil {
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fmt.Println(err)
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continue
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msg.SetRcode(r, dns.RcodeServerFailure)
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w.WriteMsg(msg)
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return
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}
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msg.Answer = append(msg.Answer, answers...)
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}
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@ -98,8 +98,7 @@ func (h *DnsHandler) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
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func MakeServer(argv *args.Arguments, dbConn *sql.DB) *dns.Server {
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handler := &DnsHandler{
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DnsResolvers: argv.DnsRecursion,
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DbConn: dbConn,
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DbConn: dbConn,
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}
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addr := fmt.Sprintf(":%d", argv.DnsPort)
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4
main.go
4
main.go
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@ -6,7 +6,7 @@ import (
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"git.hatecomputers.club/hatecomputers/hatecomputers.club/api"
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"git.hatecomputers.club/hatecomputers/hatecomputers.club/args"
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"git.hatecomputers.club/hatecomputers/hatecomputers.club/database"
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"git.hatecomputers.club/hatecomputers/hatecomputers.club/dns"
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"git.hatecomputers.club/hatecomputers/hatecomputers.club/hcdns"
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"git.hatecomputers.club/hatecomputers/hatecomputers.club/scheduler"
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"github.com/joho/godotenv"
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)
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@ -52,7 +52,7 @@ func main() {
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}
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if argv.Dns {
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server := dns.MakeServer(argv, dbConn)
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server := hcdns.MakeServer(argv, dbConn)
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log.Println("🚀🚀 DNS resolver listening on port", argv.DnsPort)
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go func() {
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err = server.ListenAndServe()
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|
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@ -0,0 +1,244 @@
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package hcdns
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import (
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"database/sql"
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"os"
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"sync"
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"testing"
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"git.hatecomputers.club/hatecomputers/hatecomputers.club/args"
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"git.hatecomputers.club/hatecomputers/hatecomputers.club/database"
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"git.hatecomputers.club/hatecomputers/hatecomputers.club/hcdns"
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"github.com/miekg/dns"
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)
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const (
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testDBPath = "test.db"
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address = "127.0.0.1:8353"
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dnsPort = 8353
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)
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func setup(dbPath string) (*sql.DB, *dns.Server, *sync.WaitGroup) {
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testDb := database.MakeConn(&dbPath)
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database.Migrate(testDb)
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testUser := &database.User{
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ID: "test",
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}
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database.FindOrSaveUser(testDb, testUser)
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server := hcdns.MakeServer(&args.Arguments{
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DnsPort: dnsPort,
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}, testDb)
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waitGroup := sync.WaitGroup{}
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waitGroup.Add(1)
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go func() {
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server.ListenAndServe()
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waitGroup.Done()
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}()
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return testDb, server, &waitGroup
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}
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func destroy(conn *sql.DB, path string) {
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conn.Close()
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os.Remove(path)
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}
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func TestWhenCNAMEIsResolved(t *testing.T) {
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t.Log("TestWhenCNAMEIsResolved")
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testDb, server, _ := setup(testDBPath)
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defer destroy(testDb, testDBPath)
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defer server.Shutdown()
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cname := &database.DNSRecord{
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ID: "1",
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UserID: "test",
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Name: "cname.internal.example.com.",
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Type: "CNAME",
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Content: "res.example.com.",
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TTL: 300,
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Internal: true,
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}
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a := &database.DNSRecord{
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ID: "2",
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UserID: "test",
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Name: "res.example.com.",
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Type: "A",
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Content: "127.0.0.1",
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TTL: 300,
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Internal: true,
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}
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database.SaveDNSRecord(testDb, cname)
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database.SaveDNSRecord(testDb, a)
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qtype := dns.TypeA
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domain := dns.Fqdn(cname.Name)
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client := new(dns.Client)
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message := new(dns.Msg)
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message.SetQuestion(domain, qtype)
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in, _, err := client.Exchange(message, address)
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if err != nil {
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t.Fatal(err)
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}
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if len(in.Answer) != 2 {
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t.Fatalf("expected 2 answers, got %d", len(in.Answer))
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}
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if in.Answer[0].Header().Name != cname.Name {
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t.Fatalf("expected cname.internal.example.com., got %s", in.Answer[0].Header().Name)
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}
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if in.Answer[1].Header().Name != a.Name {
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t.Fatalf("expected res.example.com., got %s", in.Answer[1].Header().Name)
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}
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if in.Answer[0].(*dns.CNAME).Target != a.Name {
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t.Fatalf("expected res.example.com., got %s", in.Answer[0].(*dns.CNAME).Target)
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}
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if in.Answer[1].(*dns.A).A.String() != a.Content {
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t.Fatalf("expected %s, got %s", a.Content, in.Answer[1].(*dns.A).A.String())
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}
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if in.Answer[0].Header().Rrtype != dns.TypeCNAME {
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t.Fatalf("expected CNAME, got %d", in.Answer[0].Header().Rrtype)
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}
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if in.Answer[1].Header().Rrtype != dns.TypeA {
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t.Fatalf("expected A, got %d", in.Answer[1].Header().Rrtype)
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}
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if int(in.Answer[0].Header().Ttl) != cname.TTL {
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t.Fatalf("expected %d, got %d", cname.TTL, in.Answer[0].Header().Ttl)
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}
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if !in.Authoritative {
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t.Fatalf("expected authoritative response")
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}
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}
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func TestWhenNoRecordNxDomain(t *testing.T) {
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t.Log("TestWhenNoRecordNxDomain")
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testDb, server, _ := setup(testDBPath)
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defer destroy(testDb, testDBPath)
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defer server.Shutdown()
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qtype := dns.TypeA
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domain := dns.Fqdn("nonexistant.example.com.")
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client := new(dns.Client)
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message := new(dns.Msg)
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message.SetQuestion(domain, qtype)
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in, _, err := client.Exchange(message, address)
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if err != nil {
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t.Fatal(err)
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}
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if len(in.Answer) != 0 {
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t.Fatalf("expected 0 answers, got %d", len(in.Answer))
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}
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if in.Rcode != dns.RcodeNameError {
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t.Fatalf("expected NXDOMAIN, got %d", in.Rcode)
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}
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}
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func TestWhenUnresolvingCNAME(t *testing.T) {
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t.Log("TestWhenUnresolvingCNAME")
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testDb, server, _ := setup(testDBPath)
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defer destroy(testDb, testDBPath)
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defer server.Shutdown()
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|
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cname := &database.DNSRecord{
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ID: "1",
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UserID: "test",
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Name: "cname.internal.example.com.",
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Type: "CNAME",
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Content: "nonexistant.example.com.",
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TTL: 300,
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Internal: true,
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}
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database.SaveDNSRecord(testDb, cname)
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|
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qtype := dns.TypeA
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domain := dns.Fqdn(cname.Name)
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client := new(dns.Client)
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message := new(dns.Msg)
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message.SetQuestion(domain, qtype)
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in, _, err := client.Exchange(message, address)
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|
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if err != nil {
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t.Fatal(err)
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}
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|
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if len(in.Answer) != 1 {
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t.Fatalf("expected 1 answer, got %d", len(in.Answer))
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}
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|
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if !in.Authoritative {
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t.Fatalf("expected authoritative response")
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}
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|
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if in.Answer[0].Header().Name != cname.Name {
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t.Fatalf("expected cname.internal.example.com., got %s", in.Answer[0].Header().Name)
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}
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|
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if in.Answer[0].Header().Rrtype != dns.TypeCNAME {
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t.Fatalf("expected CNAME, got %d", in.Answer[0].Header().Rrtype)
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}
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|
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if in.Answer[0].(*dns.CNAME).Target != cname.Content {
|
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t.Fatalf("expected nonexistant.example.com., got %s", in.Answer[0].(*dns.CNAME).Target)
|
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}
|
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|
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if in.Rcode == dns.RcodeNameError {
|
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t.Fatalf("expected no NXDOMAIN, got %d", in.Rcode)
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}
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}
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|
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func TestWhenUnresolvingCNAMEWithMaxDepth(t *testing.T) {
|
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t.Log("TestWhenUnresolvingCNAMEWithMaxDepth")
|
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|
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testDb, server, _ := setup(testDBPath)
|
||||
defer destroy(testDb, testDBPath)
|
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defer server.Shutdown()
|
||||
|
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cname := &database.DNSRecord{
|
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ID: "1",
|
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UserID: "test",
|
||||
Name: "cname.internal.example.com.",
|
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Type: "CNAME",
|
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Content: "cname.internal.example.com.",
|
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TTL: 300,
|
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Internal: true,
|
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}
|
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database.SaveDNSRecord(testDb, cname)
|
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|
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qtype := dns.TypeA
|
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domain := dns.Fqdn(cname.Name)
|
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client := new(dns.Client)
|
||||
message := new(dns.Msg)
|
||||
message.SetQuestion(domain, qtype)
|
||||
|
||||
in, _, err := client.Exchange(message, address)
|
||||
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
if len(in.Answer) > 0 {
|
||||
t.Fatalf("expected 0 answers, got %d", len(in.Answer))
|
||||
}
|
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if in.Rcode != dns.RcodeServerFailure {
|
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t.Fatalf("expected SERVFAIL, got %d", in.Rcode)
|
||||
}
|
||||
}
|
Loading…
Reference in New Issue