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Allow A records without rdata

This commit is contained in:
Miek Gieben 2011-12-17 20:31:31 +01:00
parent ce0fba8b54
commit 58e5def52a
1 changed files with 12 additions and 8 deletions
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20
msg.go
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@ -337,27 +337,33 @@ func packStructValue(val reflect.Value, msg []byte, off int) (off1 int, ok bool)
case "A":
// It must be a slice of 4, even if it is 16, we encode
// only the first 4
if off+net.IPv4len > lenmsg {
//fmt.Fprintf(os.Stderr, "dns: overflow packing A")
return lenmsg, false
}
switch fv.Len() {
case net.IPv6len:
if off+net.IPv4len > lenmsg {
//fmt.Fprintf(os.Stderr, "dns: overflow packing A")
return lenmsg, false
}
msg[off] = byte(fv.Index(12).Uint())
msg[off+1] = byte(fv.Index(13).Uint())
msg[off+2] = byte(fv.Index(14).Uint())
msg[off+3] = byte(fv.Index(15).Uint())
off += net.IPv4len
case net.IPv4len:
if off+net.IPv4len > lenmsg {
//fmt.Fprintf(os.Stderr, "dns: overflow packing A")
return lenmsg, false
}
msg[off] = byte(fv.Index(0).Uint())
msg[off+1] = byte(fv.Index(1).Uint())
msg[off+2] = byte(fv.Index(2).Uint())
msg[off+3] = byte(fv.Index(3).Uint())
off += net.IPv4len
case 0:
// Allowed, for dynamic updates
default:
//fmt.Fprintf(os.Stderr, "dns: overflow packing A")
println("overflow A")
return lenmsg, false
}
off += net.IPv4len
case "AAAA":
if fv.Len() > net.IPv6len || off+fv.Len() > lenmsg {
//fmt.Fprintf(os.Stderr, "dns: overflow packing AAAA")
@ -511,7 +517,6 @@ func unpackStructValue(val reflect.Value, msg []byte, off int) (off1 int, ok boo
return lenmsg, false
case "A":
if off+net.IPv4len > len(msg) {
println("hier")
//fmt.Fprintf(os.Stderr, "dns: overflow unpacking A")
return lenmsg, false
}
@ -560,7 +565,6 @@ func unpackStructValue(val reflect.Value, msg []byte, off int) (off1 int, ok boo
length = int(msg[off+1])
if length == 0 || length > 32 {
//fmt.Fprintf(os.Stderr, "dns: overflow unpacking NSEC")
println("illegal length value", length)
break
// return lenmsg, false
}