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This commit is contained in:
Miek Gieben 2012-01-26 22:46:59 +01:00
parent 7b1f981acb
commit 4f588a5d15
1 changed files with 18 additions and 18 deletions
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36
msg.go
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@ -55,7 +55,7 @@ var (
ErrDenialCe error = &Error{Err: "no matching closest encloser found"} ErrDenialCe error = &Error{Err: "no matching closest encloser found"}
ErrDenialNc error = &Error{Err: "no covering NSEC3 found for next closer"} ErrDenialNc error = &Error{Err: "no covering NSEC3 found for next closer"}
ErrDenialSo error = &Error{Err: "no covering NSEC3 found for source of synthesis"} ErrDenialSo error = &Error{Err: "no covering NSEC3 found for source of synthesis"}
ErrDenialBit error = &Error{Err: "type not denied in NSEC3 bitmap"} ErrDenialBit error = &Error{Err: "type not denied in NSEC3 bitmap"}
) )
// A manually-unpacked version of (id, bits). // A manually-unpacked version of (id, bits).
@ -77,11 +77,11 @@ type MsgHdr struct {
// The layout of a DNS message. // The layout of a DNS message.
type Msg struct { type Msg struct {
MsgHdr MsgHdr
Compress bool // If true, the message will be compressed when converted to wire format. Compress bool // If true, the message will be compressed when converted to wire format.
Question []Question Question []Question // Holds the RR(s) of the question section.
Answer []RR Answer []RR // Holds the RR(s) of the answer section.
Ns []RR Ns []RR // Holds the RR(s) of the authority section.
Extra []RR Extra []RR // Holds the RR(s) of the additional section.
} }
// Map of strings for each RR wire type. // Map of strings for each RR wire type.
@ -420,10 +420,10 @@ func packStructValue(val reflect.Value, msg []byte, off int, compression map[str
} }
case "NSEC": // NSEC/NSEC3 case "NSEC": // NSEC/NSEC3
// This is the uint16 type bitmap // This is the uint16 type bitmap
if val.Field(i).Len() == 0 { if val.Field(i).Len() == 0 {
// Do absolutely nothing // Do absolutely nothing
break break
} }
lastwindow := uint16(0) lastwindow := uint16(0)
length := uint16(0) length := uint16(0)
@ -444,10 +444,10 @@ func packStructValue(val reflect.Value, msg []byte, off int, compression map[str
} }
length = (t - window*256) / 8 length = (t - window*256) / 8
bit := t - (window * 256) - (length * 8) bit := t - (window * 256) - (length * 8)
if off+2+int(length) > lenmsg { if off+2+int(length) > lenmsg {
println("dns: overflow packing NSECx bitmap") println("dns: overflow packing NSECx bitmap")
return lenmsg, false return lenmsg, false
} }
// Setting the window # // Setting the window #
msg[off] = byte(window) msg[off] = byte(window)
@ -612,12 +612,12 @@ func unpackStructValue(val reflect.Value, msg []byte, off int) (off1 int, ok boo
lenmsg := len(msg) lenmsg := len(msg)
switch fv := val.Field(i); fv.Kind() { switch fv := val.Field(i); fv.Kind() {
default: default:
println("dns: unknown case unpacking struct") println("dns: unknown case unpacking struct")
return lenmsg, false return lenmsg, false
case reflect.Slice: case reflect.Slice:
switch val.Type().Field(i).Tag { switch val.Type().Field(i).Tag {
default: default:
println("dns: unknown tag unpacking struct") println("dns: unknown tag unpacking struct")
return lenmsg, false return lenmsg, false
case "A": case "A":
if off+net.IPv4len > len(msg) { if off+net.IPv4len > len(msg) {
@ -759,7 +759,7 @@ func unpackStructValue(val reflect.Value, msg []byte, off int) (off1 int, ok boo
var s string var s string
switch val.Type().Field(i).Tag { switch val.Type().Field(i).Tag {
default: default:
println("dns: unknown tag unpacking string") println("dns: unknown tag unpacking string")
return lenmsg, false return lenmsg, false
case "hex": case "hex":
// Rest of the RR is hex encoded, network order an issue here? // Rest of the RR is hex encoded, network order an issue here?
@ -778,7 +778,7 @@ func unpackStructValue(val reflect.Value, msg []byte, off int) (off1 int, ok boo
consumed = 0 // return len(msg), false? consumed = 0 // return len(msg), false?
} }
if off+rdlength-consumed > lenmsg { if off+rdlength-consumed > lenmsg {
println("dns: overflow when unpacking hex string") println("dns: overflow when unpacking hex string")
return lenmsg, false return lenmsg, false
} }
s = hex.EncodeToString(msg[off : off+rdlength-consumed]) s = hex.EncodeToString(msg[off : off+rdlength-consumed])