diff options
Diffstat (limited to 'vendor/github.com/miekg/dns/dns.go')
| -rw-r--r-- | vendor/github.com/miekg/dns/dns.go | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/vendor/github.com/miekg/dns/dns.go b/vendor/github.com/miekg/dns/dns.go deleted file mode 100644 index a88484b06..000000000 --- a/vendor/github.com/miekg/dns/dns.go +++ /dev/null @@ -1,158 +0,0 @@ -package dns - -import ( - "encoding/hex" - "strconv" -) - -const ( - year68 = 1 << 31 // For RFC1982 (Serial Arithmetic) calculations in 32 bits. - defaultTtl = 3600 // Default internal TTL. - - // DefaultMsgSize is the standard default for messages larger than 512 bytes. - DefaultMsgSize = 4096 - // MinMsgSize is the minimal size of a DNS packet. - MinMsgSize = 512 - // MaxMsgSize is the largest possible DNS packet. - MaxMsgSize = 65535 -) - -// Error represents a DNS error. -type Error struct{ err string } - -func (e *Error) Error() string { - if e == nil { - return "dns: <nil>" - } - return "dns: " + e.err -} - -// An RR represents a resource record. -type RR interface { - // Header returns the header of an resource record. The header contains - // everything up to the rdata. - Header() *RR_Header - // String returns the text representation of the resource record. - String() string - - // copy returns a copy of the RR - copy() RR - - // len returns the length (in octets) of the compressed or uncompressed RR in wire format. - // - // If compression is nil, the uncompressed size will be returned, otherwise the compressed - // size will be returned and domain names will be added to the map for future compression. - len(off int, compression map[string]struct{}) int - - // pack packs the records RDATA into wire format. The header will - // already have been packed into msg. - pack(msg []byte, off int, compression compressionMap, compress bool) (off1 int, err error) - - // unpack unpacks an RR from wire format. - // - // This will only be called on a new and empty RR type with only the header populated. It - // will only be called if the record's RDATA is non-empty. - unpack(msg []byte, off int) (off1 int, err error) - - // parse parses an RR from zone file format. - // - // This will only be called on a new and empty RR type with only the header populated. - parse(c *zlexer, origin string) *ParseError - - // isDuplicate returns whether the two RRs are duplicates. - isDuplicate(r2 RR) bool -} - -// RR_Header is the header all DNS resource records share. -type RR_Header struct { - Name string `dns:"cdomain-name"` - Rrtype uint16 - Class uint16 - Ttl uint32 - Rdlength uint16 // Length of data after header. -} - -// Header returns itself. This is here to make RR_Header implements the RR interface. -func (h *RR_Header) Header() *RR_Header { return h } - -// Just to implement the RR interface. -func (h *RR_Header) copy() RR { return nil } - -func (h *RR_Header) String() string { - var s string - - if h.Rrtype == TypeOPT { - s = ";" - // and maybe other things - } - - s += sprintName(h.Name) + "\t" - s += strconv.FormatInt(int64(h.Ttl), 10) + "\t" - s += Class(h.Class).String() + "\t" - s += Type(h.Rrtype).String() + "\t" - return s -} - -func (h *RR_Header) len(off int, compression map[string]struct{}) int { - l := domainNameLen(h.Name, off, compression, true) - l += 10 // rrtype(2) + class(2) + ttl(4) + rdlength(2) - return l -} - -func (h *RR_Header) pack(msg []byte, off int, compression compressionMap, compress bool) (off1 int, err error) { - // RR_Header has no RDATA to pack. - return off, nil -} - -func (h *RR_Header) unpack(msg []byte, off int) (int, error) { - panic("dns: internal error: unpack should never be called on RR_Header") -} - -func (h *RR_Header) parse(c *zlexer, origin string) *ParseError { - panic("dns: internal error: parse should never be called on RR_Header") -} - -// ToRFC3597 converts a known RR to the unknown RR representation from RFC 3597. -func (rr *RFC3597) ToRFC3597(r RR) error { - buf := make([]byte, Len(r)) - headerEnd, off, err := packRR(r, buf, 0, compressionMap{}, false) - if err != nil { - return err - } - buf = buf[:off] - - *rr = RFC3597{Hdr: *r.Header()} - rr.Hdr.Rdlength = uint16(off - headerEnd) - - if noRdata(rr.Hdr) { - return nil - } - - _, err = rr.unpack(buf, headerEnd) - return err -} - -// fromRFC3597 converts an unknown RR representation from RFC 3597 to the known RR type. -func (rr *RFC3597) fromRFC3597(r RR) error { - hdr := r.Header() - *hdr = rr.Hdr - - // Can't overflow uint16 as the length of Rdata is validated in (*RFC3597).parse. - // We can only get here when rr was constructed with that method. - hdr.Rdlength = uint16(hex.DecodedLen(len(rr.Rdata))) - - if noRdata(*hdr) { - // Dynamic update. - return nil - } - - // rr.pack requires an extra allocation and a copy so we just decode Rdata - // manually, it's simpler anyway. - msg, err := hex.DecodeString(rr.Rdata) - if err != nil { - return err - } - - _, err = r.unpack(msg, 0) - return err -} |