476 lines
13 KiB
Go
476 lines
13 KiB
Go
package dns
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import (
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"net"
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)
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// All data from c is either _STRING or _BLANK
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// After the rdata there may come 1 _BLANK and then a _NEWLINE
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// or immediately a _NEWLINE. If this is not the case we flag
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// an error: garbage after rdata.
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func slurpRemainder(c chan Lex) error {
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l := <-c
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switch l.value {
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case _BLANK:
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l = <-c
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if l.value != _NEWLINE {
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return &ParseError{"garbage after rdata", l}
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}
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// Ok
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case _NEWLINE:
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// Ok
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default:
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return &ParseError{"garbage after rdata", l}
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}
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return nil
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}
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func setRR(h RR_Header, c chan Lex) (RR, error) {
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var (
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r RR
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e error
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)
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switch h.Rrtype {
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case TypeA:
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r, e = setA(h, c)
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if se := slurpRemainder(c); se != nil {
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return nil, se
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}
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case TypeRRSIG:
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r, e = setRRSIG(h, c)
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// Remain slurped in function
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default:
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println("RR not supported")
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}
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return r, e
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}
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func setA(h RR_Header, c chan Lex) (RR, error) {
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rr := new(RR_A)
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rr.Hdr = h
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l := <-c
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rr.A = net.ParseIP(l.token)
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if rr.A == nil {
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return nil, &ParseError{"bad a", l}
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}
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return rr, nil
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}
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func setAAAA(h RR_Header, c chan Lex) (RR, error) {
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rr := new(RR_AAAA)
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rr.Hdr = h
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l := <-c
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rr.AAAA = net.ParseIP(l.token)
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if rr.AAAA == nil {
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return nil, &ParseError{"bad AAAA", l}
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}
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return rr, nil
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}
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func setNS(h RR_Header, c chan Lex) (RR, error) {
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rr := new(RR_NS)
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rr.Hdr = h
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l := <-c
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rr.Ns = l.token
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if ! IsDomainName(l.token) {
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return nil, &ParseError{"bad NS", l}
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}
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return rr, nil
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}
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func setMX(h RR_Header, c chan Lex) (RR, error) {
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rr := new(RR_MX)
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rr.Hdr = h
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l := <-c
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i, e := strconv.Atoui(l.token)
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if e != nil {
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return nil, &ParseError{"bad MX", l}
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}
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rr.Pref = uint16(i)
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<-c // _BLANK
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l = <-c // _STRING
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rr.Mx = l.token
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if ! IsDomainName(l.token) {
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return nil, &ParseError{"bad CNAME", l}
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}
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return rr, nil
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}
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func setCNAME(h RR_Header, c chan Lex) (RR, error) {
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rr := new(RR_CNAME)
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rr.Hdr = h
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l := <-c
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rr.Cname = l.token
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if ! IsDomainName(l.token) {
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return nil, &ParseError{"bad CNAME", l}
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}
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return rr, nil
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}
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func setSOA(h RR_Header, c chan Lex) (RR, error) {
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rr := new(RR_SOA)
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rr.Hdr = h
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l := <-c
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var (
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i uint
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err os.Error
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)
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rr.Ns = l.token
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<-c // _BLANK
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if ! IsDomainName(l.token) {
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return nil, &ParseError{"bad SOA", l}
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}
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l = <-c
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rr.Mbox = l.token
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if ! IsDomainName(l.token) {
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return nil, &ParseError{Error: "bad SOA", name: rdf[1], line: l}
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}
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<-c // _BLANK
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for i := 0; i < 5; i++ {
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l = <-c
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if j, e = strconv.Atoui(s); e != nil {
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return nil, &ParseError{"bad SOA", l}
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}
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switch i {
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case 0: rr.Serial = uint32(j)
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case 1: rr.Refresh = uint32(j)
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case 2: rr.Retry = uint32(j)
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case 3: rr.Expire = uint32(j)
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case 4: rr.Minttl = uint32(j)
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}
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<-c // _BLANK
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}
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return rr, nil
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}
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func setRRSIG(h RR_Header, c chan Lex) (RR, error) {
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rr := new(RR_RRSIG)
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rr.Hdr = h
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l := <-c
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if t, ok := str_rr[strings.ToUpper(l.token]; !ok {
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return nil, &ParseError{"bad RRSIG", l}
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} else {
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rr.TypeCovered = t
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}
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<-c // _BLANK
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l = <-c
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if i, err := strconv.Atoui(l.token); err != nil {
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return nil, &ParseError{"bad RRSIG", l}
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} else {
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rr.Algorithm = uint8(i)
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}
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<-c // _BLANK
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l = <-c
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if i, err := strconv.Atoui(l.token); err != nil {
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return nil, &ParseError{"bad RRSIG", l}
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} else {
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rr.Labels = uint8(i)
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}
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<-c // _BLANK
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l = <-c
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if i, err := strconv.Atoui(l.token); err != nil {
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return nil, &ParseError{"bad RRSIG", l}
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} else {
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rr.OrigTtl = uint32(i)
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}
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<-c // _BLANK
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l = <-c
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if i, err := dateToTime(l.token); err != nil {
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return nil, &ParseError{"bad RRSIG", l}
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} else {
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rr.Expiration = i
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}
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<-c // _BLANK
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l = <-c
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if i, err := dateToTime(l.token); err != nil {
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return nil, &ParseError{"bad RRSIG", l}
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} else {
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rr.Inception = i
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}
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<-c // _BLANK
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l = <-c
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if i, err := strconv.Atoui(l.token); err != nil {
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return nil, &ParseError{"bad RRSIG", l}
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} else {
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rr.KeyTag = uint16(i)
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}
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<-c // _BLANK
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l = <-c
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if ! IsDomainName(l.token) {
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return nil, &ParseError{"bad RRSIG", l}
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} else {
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rr.SignerName = l.token
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}
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// Get the remaining data until we see a NEWLINE
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l = <-c
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var s string
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for l.value != _NEWLINE {
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switch l.value {
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case _STRING:
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s += l.token
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case _BLANK:
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// Ok
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default:
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return nil, &ParseError{"bad RRSIG", l}
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}
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l = <-c
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}
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rr.Signature = s
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return rr, nil
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}
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func setNSEC(h RR_Header, c chan Lex) (RR, error) {
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rr := new(RR_NSEC)
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rr.Hdr = h
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l := <-c
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if ! IsDomainName(l.token) {
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return nil, &ParseError{"bad NSEC", l}
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} else {
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rr.NextDomain = l.token
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}
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rr.TypeBitMap = make([]uint16, 0)
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l = <-c
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for l.value != _NEWLINE {
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case _BLANK:
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// Ok
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case _STRING:
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if k, ok := str_rr[strings.ToUpper(l.token)]; !ok {
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return nil, &ParseError{"bad NSEC", l}
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} else {
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append(rr.TypeBitMap, k)
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}
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default:
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return nil, &ParseError{"bad NSEC", l}
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}
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return rr, nil
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}
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func setNSEC3(h RR_Header, c chan Lex) (RR, error) {
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rr := new(RR_NSEC3)
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rr.Hdr = h
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rdf := fields(data[mark:p], 0)
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if i, e = strconv.Atoui(rdf[0]); e != nil {
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zp.Err <- &ParseError{Error: "bad NSEC3", name: rdf[0], line: l}
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return
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}
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rr.Hash = uint8(i)
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if i, e = strconv.Atoui(rdf[1]); e != nil {
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zp.Err <- &ParseError{Error: "bad NSEC3", name: rdf[1], line: l}
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return
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}
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rr.Flags = uint8(i)
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if i, e = strconv.Atoui(rdf[2]); e != nil {
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zp.Err <- &ParseError{Error: "bad NSEC3", name: rdf[2], line: l}
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return
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}
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rr.Iterations = uint16(i)
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rr.SaltLength = uint8(len(rdf[3]))
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rr.Salt = rdf[3]
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rr.HashLength = uint8(len(rdf[4]))
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rr.NextDomain = rdf[4]
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rr.TypeBitMap = make([]uint16, len(rdf)-5)
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// Fill the Type Bit Map
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for i := 5; i < len(rdf); i++ {
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// Check if its there in the map TODO
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rr.TypeBitMap[i-5] = str_rr[strings.ToUpper(rdf[i])]
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}
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zp.RR <- rr
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}
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func setNSEC3PARAM(h RR_Header, c chan Lex) (RR, error) {
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rr := new(RR_NSEC3PARAM)
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rr.Hdr = h
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rdf := fields(data[mark:p], 4)
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if i, e = strconv.Atoi(rdf[0]); e != nil {
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zp.Err <- &ParseError{Error: "bad NSEC3PARAM", name: rdf[0], line: l}
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return
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}
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rr.Hash = uint8(i)
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if i, e = strconv.Atoi(rdf[1]); e != nil {
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zp.Err <- &ParseError{Error: "bad NSEC3PARAM", name: rdf[1], line: l}
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return
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}
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rr.Flags = uint8(i)
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if i, e = strconv.Atoi(rdf[2]); e != nil {
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zp.Err <- &ParseError{Error: "bad NSEC3PARAM", name: rdf[2], line: l}
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return
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}
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rr.Iterations = uint16(i)
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rr.Salt = rdf[3]
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rr.SaltLength = uint8(len(rr.Salt))
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zp.RR <- rr
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}
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func setTXT(h RR_Header, c chan Lex) (RR, error) {
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rr := new(RR_TXT)
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rr.Hdr = h
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rr.Txt = rdf[0]
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zp.RR <- rr
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}
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/*
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func setDS(h RR_Header, c chan Lex) (RR, error) {
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rr := new(RR_DS)
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rr.Hdr = h
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action setDS {
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var (
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i uint
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e os.Error
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)
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rdf := fields(data[mark:p], 4)
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rr := new(RR_DS)
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rr.Hdr = hdr
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rr.Hdr.Rrtype = TypeDS
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if i, e = strconv.Atoui(rdf[0]); e != nil {
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zp.Err <- &ParseError{Error: "bad DS", name: rdf[0], line: l}
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return
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}
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rr.KeyTag = uint16(i)
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if i, e = strconv.Atoui(rdf[1]); e != nil {
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zp.Err <- &ParseError{Error: "bad DS", name: rdf[1], line: l}
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return
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}
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rr.Algorithm = uint8(i)
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if i, e = strconv.Atoui(rdf[2]); e != nil {
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zp.Err <- &ParseError{Error: "bad DS", name: rdf[2], line: l}
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return
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}
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rr.DigestType = uint8(i)
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rr.Digest = rdf[3]
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zp.RR <- rr
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}
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func setCNAME(h RR_Header, c chan Lex) (RR, error) {
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rr := new(RR_CNAME)
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rr.Hdr = h
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action setDLV {
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var (
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i uint
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e os.Error
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)
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rdf := fields(data[mark:p], 4)
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rr := new(RR_DLV)
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rr.Hdr = hdr
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rr.Hdr.Rrtype = TypeDLV
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if i, e = strconv.Atoui(rdf[0]); e != nil {
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zp.Err <- &ParseError{Error: "bad DS", name: rdf[0], line: l}
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return
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}
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rr.KeyTag = uint16(i)
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if i, e = strconv.Atoui(rdf[1]); e != nil {
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zp.Err <- &ParseError{Error: "bad DS", name: rdf[1], line: l}
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return
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}
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rr.Algorithm = uint8(i)
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if i, e = strconv.Atoui(rdf[2]); e != nil {
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zp.Err <- &ParseError{Error: "bad DS", name: rdf[2], line: l}
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return
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}
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rr.DigestType = uint8(i)
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rr.Digest = rdf[3]
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zp.RR <- rr
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}
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func setCNAME(h RR_Header, c chan Lex) (RR, error) {
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rr := new(RR_CNAME)
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rr.Hdr = h
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action setTA {
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var (
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i uint
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e os.Error
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)
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rdf := fields(data[mark:p], 4)
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rr := new(RR_TA)
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rr.Hdr = hdr
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rr.Hdr.Rrtype = TypeTA
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if i, e = strconv.Atoui(rdf[0]); e != nil {
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zp.Err <- &ParseError{Error: "bad DS", name: rdf[0], line: l}
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return
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}
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rr.KeyTag = uint16(i)
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if i, e = strconv.Atoui(rdf[1]); e != nil {
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zp.Err <- &ParseError{Error: "bad DS", name: rdf[1], line: l}
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return
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}
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rr.Algorithm = uint8(i)
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if i, e = strconv.Atoui(rdf[2]); e != nil {
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zp.Err <- &ParseError{Error: "bad DS", name: rdf[2], line: l}
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return
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}
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rr.DigestType = uint8(i)
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rr.Digest = rdf[3]
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zp.RR <- rr
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}
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func setCNAME(h RR_Header, c chan Lex) (RR, error) {
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rr := new(RR_CNAME)
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rr.Hdr = h
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action setDNSKEY {
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var (
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i uint
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e os.Error
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)
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rdf := fields(data[mark:p], 4)
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rr := new(RR_DNSKEY)
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rr.Hdr = hdr
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rr.Hdr.Rrtype = TypeDNSKEY
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if i, e = strconv.Atoui(rdf[0]); e != nil {
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zp.Err <- &ParseError{Error: "bad DNSKEY", name: rdf[0], line: l}
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return
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}
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rr.Flags = uint16(i)
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if i, e = strconv.Atoui(rdf[1]); e != nil {
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zp.Err <- &ParseError{Error: "bad DNSKEY", name: rdf[1], line: l}
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return
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}
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rr.Protocol = uint8(i)
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if i, e = strconv.Atoui(rdf[2]); e != nil {
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zp.Err <- &ParseError{Error: "bad DNSKEY", name: rdf[2], line: l}
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return
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}
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rr.Algorithm = uint8(i)
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rr.PublicKey = rdf[3]
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zp.RR <- rr
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}
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func setSSHFP(h RR_Header, c chan Lex) (RR, error) {
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rr := new(RR_CNAME)
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rr.Hdr = h
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var (
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i int
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e os.Error
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)
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rdf := fields(data[mark:p], 3)
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rr := new(RR_SSHFP)
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rr.Hdr = hdr
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rr.Hdr.Rrtype = TypeSSHFP
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if i, e = strconv.Atoi(rdf[0]); e != nil {
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zp.Err <- &ParseError{Error: "bad SSHFP", name: rdf[0], line: l}
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return
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}
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rr.Algorithm = uint8(i)
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if i, e = strconv.Atoi(rdf[1]); e != nil {
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zp.Err <- &ParseError{Error: "bad SSHFP", name: rdf[1], line: l}
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return
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}
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rr.Type = uint8(i)
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rr.FingerPrint = rdf[2]
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zp.RR <- rr
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}
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