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// +build debug
package stun
import "github.com/pion/stun/internal/hmac"
// CheckSize returns *AttrLengthError if got is not equal to expected.
func CheckSize(a AttrType, got, expected int) error {
if got == expected {
return nil
}
return &AttrLengthErr{
Got: got,
Expected: expected,
Attr: a,
}
}
func checkHMAC(got, expected []byte) error {
if hmac.Equal(got, expected) {
return nil
}
return &IntegrityErr{
Expected: expected,
Actual: got,
}
}
func checkFingerprint(got, expected uint32) error {
if got == expected {
return nil
}
return &CRCMismatch{
Actual: got,
Expected: expected,
}
}
// IsAttrSizeInvalid returns true if error means that attribute size is invalid.
func IsAttrSizeInvalid(err error) bool {
_, ok := err.(*AttrLengthErr)
return ok
}
// CheckOverflow returns *AttrOverflowErr if got is bigger that max.
func CheckOverflow(t AttrType, got, max int) error {
if got <= max {
return nil
}
return &AttrOverflowErr{
Type: t,
Got: got,
Max: max,
}
}
// IsAttrSizeOverflow returns true if error means that attribute size is too big.
func IsAttrSizeOverflow(err error) bool {
_, ok := err.(*AttrOverflowErr)
return ok
}
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