// Resolve wraps Unbound's ub_resolve.
func (u *Unbound) Resolve(name string, rrtype, rrclass uint16) (*Result, error) {
res := C.new_ub_result()
r := new(Result)
defer C.ub_resolve_free(res)
i := C.ub_resolve(u.ctx, C.CString(name), C.int(rrtype), C.int(rrclass), &res)
err := newError(int(i))
if err != nil {
return nil, err
}
r.Qname = C.GoString(res.qname)
r.Qtype = uint16(res.qtype)
r.Qclass = uint16(res.qclass)
r.CanonName = C.GoString(res.canonname)
r.Rcode = int(res.rcode)
r.AnswerPacket = new(dns.Msg)
r.AnswerPacket.Unpack(C.GoBytes(res.answer_packet, res.answer_len)) // Should always work
r.HaveData = res.havedata == 1
r.NxDomain = res.nxdomain == 1
r.Secure = res.secure == 1
r.Bogus = res.bogus == 1
r.WhyBogus = C.GoString(res.why_bogus)
// Re-create the RRs
var h dns.RR_Header
h.Name = r.Qname
h.Rrtype = r.Qtype
h.Class = r.Qclass
h.Ttl = 0
r.Data = make([][]byte, 0)
r.Rr = make([]dns.RR, 0)
j := 0
if r.HaveData {
b := C.GoBytes(unsafe.Pointer(C.array_elem_char(res.data, C.int(j))), C.array_elem_int(res.len, C.int(j)))
for len(b) != 0 {
// Create the RR
h.Rdlength = uint16(len(b))
msg := make([]byte, 20+len(h.Name)) // Long enough
off, _ := dns.PackStruct(&h, msg, 0)
msg = msg[:off]
rrbuf := append(msg, b...)
rr, _, err := dns.UnpackRR(rrbuf, 0)
if err == nil {
r.Rr = append(r.Rr, rr)
}
r.Data = append(r.Data, b)
j++
b = C.GoBytes(unsafe.Pointer(C.array_elem_char(res.data, C.int(j))), C.array_elem_int(res.len, C.int(j)))
}
}
return r, err
}
func setupZoneData(data map[string]interface{}, Zone *Zone) {
recordTypes := map[string]uint16{
"a": dns.TypeA,
"aaaa": dns.TypeAAAA,
"ns": dns.TypeNS,
"cname": dns.TypeCNAME,
"alias": dns.TypeMF,
}
for dk, dv_inter := range data {
dv := dv_inter.(map[string]interface{})
//log.Printf("K %s V %s TYPE-V %T\n", dk, dv, dv)
dk = strings.ToLower(dk)
Zone.Labels[dk] = new(Label)
label := Zone.Labels[dk]
label.Label = dk
label.Ttl = Zone.Options.Ttl
label.MaxHosts = Zone.Options.MaxHosts
if ttl, ok := dv["ttl"]; ok {
label.Ttl = valueToInt(ttl)
}
if maxHosts, ok := dv["max_hosts"]; ok {
label.MaxHosts = valueToInt(maxHosts)
}
for rType, dnsType := range recordTypes {
rdata := dv[rType]
if rdata == nil {
//log.Printf("No %s records for label %s\n", rType, dk)
continue
}
//log.Printf("rdata %s TYPE-R %T\n", rdata, rdata)
records := make(map[string][]interface{})
switch rdata.(type) {
case map[string]interface{}:
// Handle NS map syntax, map[ns2.example.net:<nil> ns1.example.net:<nil>]
tmp := make([]interface{}, 0)
for rdata_k, rdata_v := range rdata.(map[string]interface{}) {
if rdata_v == nil {
rdata_v = ""
}
tmp = append(tmp, []string{rdata_k, rdata_v.(string)})
}
records[rType] = tmp
case string:
// CNAME and alias
tmp := make([]interface{}, 1)
tmp[0] = rdata.(string)
records[rType] = tmp
default:
records[rType] = rdata.([]interface{})
}
//log.Printf("RECORDS %s TYPE-REC %T\n", Records, Records)
if label.Records == nil {
label.Records = make(map[uint16]Records)
label.Weight = make(map[uint16]int)
}
label.Records[dnsType] = make(Records, len(records[rType]))
for i := 0; i < len(records[rType]); i++ {
//log.Printf("RT %T %#v\n", records[rType][i], records[rType][i])
record := new(Record)
var h dns.RR_Header
// log.Println("TTL OPTIONS", Zone.Options.Ttl)
h.Ttl = uint32(label.Ttl)
h.Class = dns.ClassINET
h.Rrtype = dnsType
h.Name = label.Label + "." + Zone.Origin + "."
switch dnsType {
case dns.TypeA, dns.TypeAAAA:
rec := records[rType][i].([]interface{})
ip := rec[0].(string)
var err error
switch rec[1].(type) {
case string:
record.Weight, err = strconv.Atoi(rec[1].(string))
if err != nil {
panic("Error converting weight to integer")
}
label.Weight[dnsType] += record.Weight
case float64:
record.Weight = int(rec[1].(float64))
label.Weight[dnsType] += record.Weight
}
switch dnsType {
case dns.TypeA:
if x := net.ParseIP(ip); x != nil {
record.RR = &dns.RR_A{Hdr: h, A: x}
break
}
panic("Bad A record")
case dns.TypeAAAA:
if x := net.ParseIP(ip); x != nil {
record.RR = &dns.RR_AAAA{Hdr: h, AAAA: x}
break
}
panic("Bad AAAA record")
}
case dns.TypeCNAME:
rec := records[rType][i]
record.RR = &dns.RR_CNAME{Hdr: h, Target: dns.Fqdn(rec.(string))}
case dns.TypeMF:
rec := records[rType][i]
// MF records (how we store aliases) are not FQDNs
record.RR = &dns.RR_MF{Hdr: h, Mf: rec.(string)}
case dns.TypeNS:
rec := records[rType][i]
if h.Ttl < 86400 {
h.Ttl = 86400
}
var ns string
switch rec.(type) {
case string:
ns = rec.(string)
case []string:
recl := rec.([]string)
ns = recl[0]
if len(recl[1]) > 0 {
log.Println("NS records with names syntax not supported")
}
default:
log.Printf("Data: %T %#v\n", rec, rec)
panic("Unrecognized NS format/syntax")
}
rr := &dns.RR_NS{Hdr: h, Ns: dns.Fqdn(ns)}
record.RR = rr
default:
log.Println("type:", rType)
panic("Don't know how to handle this type")
}
if record.RR == nil {
panic("record.RR is nil")
}
label.Records[dnsType][i] = *record
}
if label.Weight[dnsType] > 0 {
sort.Sort(RecordsByWeight{label.Records[dnsType]})
}
}
}
setupSOA(Zone)
//log.Println(Zones[k])
}
func setupZoneData(data map[string]interface{}, Zone *Zone) {
recordTypes := map[string]uint16{
"a": dns.TypeA,
"aaaa": dns.TypeAAAA,
"alias": dns.TypeMF,
"cname": dns.TypeCNAME,
"mx": dns.TypeMX,
"ns": dns.TypeNS,
"txt": dns.TypeTXT,
"spf": dns.TypeSPF,
"srv": dns.TypeSRV,
"ptr": dns.TypePTR,
}
for dk, dv_inter := range data {
dv := dv_inter.(map[string]interface{})
//log.Printf("K %s V %s TYPE-V %T\n", dk, dv, dv)
label := Zone.AddLabel(dk)
for rType, rdata := range dv {
switch rType {
case "max_hosts":
label.MaxHosts = valueToInt(rdata)
continue
case "ttl":
label.Ttl = valueToInt(rdata)
continue
}
dnsType, ok := recordTypes[rType]
if !ok {
log.Printf("Unsupported record type '%s'\n", rType)
continue
}
if rdata == nil {
//log.Printf("No %s records for label %s\n", rType, dk)
continue
}
//log.Printf("rdata %s TYPE-R %T\n", rdata, rdata)
records := make(map[string][]interface{})
switch rdata.(type) {
case map[string]interface{}:
// Handle NS map syntax, map[ns2.example.net:<nil> ns1.example.net:<nil>]
tmp := make([]interface{}, 0)
for rdataK, rdataV := range rdata.(map[string]interface{}) {
if rdataV == nil {
rdataV = ""
}
tmp = append(tmp, []string{rdataK, rdataV.(string)})
}
records[rType] = tmp
case string:
// CNAME and alias
tmp := make([]interface{}, 1)
tmp[0] = rdata.(string)
records[rType] = tmp
default:
records[rType] = rdata.([]interface{})
}
//log.Printf("RECORDS %s TYPE-REC %T\n", Records, Records)
label.Records[dnsType] = make(Records, len(records[rType]))
for i := 0; i < len(records[rType]); i++ {
//log.Printf("RT %T %#v\n", records[rType][i], records[rType][i])
record := new(Record)
var h dns.RR_Header
h.Class = dns.ClassINET
h.Rrtype = dnsType
// We add the TTL as a last pass because we might not have
// processed it yet when we process the record data.
switch len(label.Label) {
case 0:
h.Name = Zone.Origin + "."
default:
h.Name = label.Label + "." + Zone.Origin + "."
}
switch dnsType {
case dns.TypeA, dns.TypeAAAA, dns.TypePTR:
str, weight := getStringWeight(records[rType][i].([]interface{}))
ip := str
record.Weight = weight
switch dnsType {
case dns.TypePTR:
record.RR = &dns.PTR{Hdr: h, Ptr: ip}
break
case dns.TypeA:
if x := net.ParseIP(ip); x != nil {
record.RR = &dns.A{Hdr: h, A: x}
break
}
panic(fmt.Errorf("Bad A record %s for %s", ip, dk))
case dns.TypeAAAA:
if x := net.ParseIP(ip); x != nil {
record.RR = &dns.AAAA{Hdr: h, AAAA: x}
break
}
panic(fmt.Errorf("Bad AAAA record %s for %s", ip, dk))
}
case dns.TypeMX:
rec := records[rType][i].(map[string]interface{})
pref := uint16(0)
mx := rec["mx"].(string)
if !strings.HasSuffix(mx, ".") {
mx = mx + "."
}
if rec["weight"] != nil {
record.Weight = valueToInt(rec["weight"])
}
if rec["preference"] != nil {
pref = uint16(valueToInt(rec["preference"]))
}
record.RR = &dns.MX{
Hdr: h,
Mx: mx,
Preference: pref}
case dns.TypeSRV:
rec := records[rType][i].(map[string]interface{})
priority := uint16(0)
srv_weight := uint16(0)
port := uint16(0)
target := rec["target"].(string)
if !dns.IsFqdn(target) {
target = target + "." + Zone.Origin
}
if rec["srv_weight"] != nil {
srv_weight = uint16(valueToInt(rec["srv_weight"]))
}
if rec["port"] != nil {
port = uint16(valueToInt(rec["port"]))
}
if rec["priority"] != nil {
priority = uint16(valueToInt(rec["priority"]))
}
record.RR = &dns.SRV{
Hdr: h,
Priority: priority,
Weight: srv_weight,
Port: port,
Target: target}
case dns.TypeCNAME:
rec := records[rType][i]
var target string
var weight int
switch rec.(type) {
case string:
target = rec.(string)
case []interface{}:
target, weight = getStringWeight(rec.([]interface{}))
}
if !dns.IsFqdn(target) {
target = target + "." + Zone.Origin
}
record.Weight = weight
record.RR = &dns.CNAME{Hdr: h, Target: dns.Fqdn(target)}
case dns.TypeMF:
rec := records[rType][i]
// MF records (how we store aliases) are not FQDNs
record.RR = &dns.MF{Hdr: h, Mf: rec.(string)}
case dns.TypeNS:
rec := records[rType][i]
if h.Ttl < 86400 {
h.Ttl = 86400
}
var ns string
switch rec.(type) {
case string:
ns = rec.(string)
case []string:
recl := rec.([]string)
ns = recl[0]
if len(recl[1]) > 0 {
log.Println("NS records with names syntax not supported")
}
default:
log.Printf("Data: %T %#v\n", rec, rec)
panic("Unrecognized NS format/syntax")
}
rr := &dns.NS{Hdr: h, Ns: dns.Fqdn(ns)}
record.RR = rr
case dns.TypeTXT:
rec := records[rType][i]
var txt string
switch rec.(type) {
case string:
txt = rec.(string)
case map[string]interface{}:
recmap := rec.(map[string]interface{})
if weight, ok := recmap["weight"]; ok {
record.Weight = valueToInt(weight)
}
if t, ok := recmap["txt"]; ok {
txt = t.(string)
}
}
if len(txt) > 0 {
rr := &dns.TXT{Hdr: h, Txt: []string{txt}}
record.RR = rr
} else {
log.Printf("Zero length txt record for '%s' in '%s'\n", label.Label, Zone.Origin)
continue
}
// Initial SPF support added here, cribbed from the TypeTXT case definition - SPF records should be handled identically
case dns.TypeSPF:
rec := records[rType][i]
var spf string
switch rec.(type) {
case string:
spf = rec.(string)
case map[string]interface{}:
recmap := rec.(map[string]interface{})
if weight, ok := recmap["weight"]; ok {
record.Weight = valueToInt(weight)
}
if t, ok := recmap["spf"]; ok {
spf = t.(string)
}
}
if len(spf) > 0 {
rr := &dns.SPF{Hdr: h, Txt: []string{spf}}
record.RR = rr
} else {
log.Printf("Zero length SPF record for '%s' in '%s'\n", label.Label, Zone.Origin)
continue
}
default:
log.Println("type:", rType)
panic("Don't know how to handle this type")
}
if record.RR == nil {
panic("record.RR is nil")
}
label.Weight[dnsType] += record.Weight
label.Records[dnsType][i] = *record
}
if label.Weight[dnsType] > 0 {
sort.Sort(RecordsByWeight{label.Records[dnsType]})
}
}
}
// loop over exisiting labels, create zone records for missing sub-domains
// and set TTLs
for k := range Zone.Labels {
if strings.Contains(k, ".") {
subLabels := strings.Split(k, ".")
for i := 1; i < len(subLabels); i++ {
subSubLabel := strings.Join(subLabels[i:], ".")
if _, ok := Zone.Labels[subSubLabel]; !ok {
Zone.AddLabel(subSubLabel)
}
}
}
if Zone.Labels[k].Ttl > 0 {
for _, records := range Zone.Labels[k].Records {
for _, r := range records {
r.RR.Header().Ttl = uint32(Zone.Labels[k].Ttl)
}
}
}
}
setupSOA(Zone)
//log.Println(Zones[k])
}
