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Works, stop touching it

This commit is contained in:
Miek Gieben 2011-07-14 21:14:55 +02:00
parent bd03eda9f4
commit ff351f2cf7
2 changed files with 536 additions and 317 deletions
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792
zparse.go
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File diff suppressed because it is too large Load Diff

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