38 lines
953 B
Go
38 lines
953 B
Go
|
package dns
|
||
|
|
|
||
|
|
//go:generate go run duplicate_generate.go
|
||
|
|
|
||
|
|
// IsDuplicate checks of r1 and r2 are duplicates of each other, excluding the TTL.
|
||
|
|
// So this means the header data is equal *and* the RDATA is the same. Returns true
|
||
|
|
// if so, otherwise false. It's a protocol violation to have identical RRs in a message.
|
||
|
|
func IsDuplicate(r1, r2 RR) bool {
|
||
|
|
// Check whether the record header is identical.
|
||
|
|
if !r1.Header().isDuplicate(r2.Header()) {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
// Check whether the RDATA is identical.
|
||
|
|
return r1.isDuplicate(r2)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r1 *RR_Header) isDuplicate(_r2 RR) bool {
|
||
|
|
r2, ok := _r2.(*RR_Header)
|
||
|
|
if !ok {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
if r1.Class != r2.Class {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
if r1.Rrtype != r2.Rrtype {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
if !isDuplicateName(r1.Name, r2.Name) {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
// ignore TTL
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
|
||
|
|
// isDuplicateName checks if the domain names s1 and s2 are equal.
|
||
|
|
func isDuplicateName(s1, s2 string) bool { return equal(s1, s2) }
|