Works, stop touching it
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61
zparse.rl
61
zparse.rl
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@ -1,8 +1,13 @@
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package dns
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// Parse RRs
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// With the thankful help of gdnsd and the Go examples for Ragel
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import (
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"os"
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"fmt"
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"net"
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"strconv"
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)
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%%{
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@ -10,22 +15,44 @@ import (
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write data;
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}%%
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func zparse(data string) (res int, err os.Error) {
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cs, p, pe, eof := 0, 0, len(data), len(data)
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func zparse(data string) (rr RR, err os.Error) {
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cs, p, pe := 0, 0, len(data)
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mark := 0
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eof := len(data)
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hdr := new(RR_Header)
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%%{
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action out { fmt.Printf("%s\n", data[p:pe]) }
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action defTtl { fmt.Printf("%s\n", data[p:pe]) }
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action setTtl { fmt.Printf("%s\n", data[p:pe]) }
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action mark { mark = p }
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action rdata_out { fmt.Printf("rdata {%s}\n", data[mark:p]) }
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action qname_out { fmt.Printf("qname {%s}\n", data[mark:p]); hdr.Name = data[mark:p] }
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action qclass_out { fmt.Printf("qclass {%s}\n", data[mark:p]) }
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action qtype_out {
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fmt.Printf("qtype {%s}\n", data[mark:p])
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}
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qtype = ('IN'i|'CS'i|'CH'i|'HS'i|'ANY'i|'NONE'i);
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ttl = digit+;
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blank = [ \t]+;
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qname = any+;
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action defTtl { fmt.Printf("defttl {%s}\n", data[mark:p]) }
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action setTtl {
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fmt.Printf("ttl {%s}\n", data[mark:p])
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ttl, _ := strconv.Atoi(data[mark:p])
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hdr.Ttl = uint32(ttl)
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}
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# RDATA definition
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rdata_a = any+;
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rdata_dnskey = any+;
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action rdata_a {
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r := new(RR_A)
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r.Hdr = *hdr
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r.Hdr.Rrtype = TypeA
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r.A = net.ParseIP(data[mark:p])
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}
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qtype = ('IN'i|'CS'i|'CH'i|'HS'i|'ANY'i|'NONE'i) %qtype_out;
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ttl = digit+ >mark;
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blank = [ \t]+ %mark;
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qname = [a-zA-Z0-9.\\]+ %qname_out;
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# RDATA definitions
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rdata_a = any+ $1 %0 %rdata_a;
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rdata_dnskey = [a-z0-9.\\]+;
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lhs = qname? blank %defTtl (
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(ttl %setTtl blank (qtype blank)?)
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@ -34,8 +61,8 @@ func zparse(data string) (res int, err os.Error) {
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# RR definitions
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rhs = (
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('A'i blank rdata_a) %out
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| ('DNSKEY'i blank rdata_dnskey) %out
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('A'i %qtype_out blank rdata_a)
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| ('DNSKEY'i %qtype_out blank rdata_dnskey)
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);
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rr = lhs rhs;
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@ -49,10 +76,10 @@ func zparse(data string) (res int, err os.Error) {
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if cs < z_first_final {
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// No clue what I'm doing what so ever
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if p == pe {
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return 0, os.ErrorString("unexpected eof")
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return nil, os.ErrorString("unexpected eof")
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} else {
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return 0, os.ErrorString(fmt.Sprintf("error at position %d", p))
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return nil, os.ErrorString(fmt.Sprintf("error at position %d", p))
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}
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}
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return 0 ,nil
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return rr ,nil
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}
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