1package dns 2 3//go:generate go run duplicate_generate.go 4 5// IsDuplicate checks of r1 and r2 are duplicates of each other, excluding the TTL. 6// So this means the header data is equal *and* the RDATA is the same. Return true 7// is so, otherwise false. 8// It's a protocol violation to have identical RRs in a message. 9func IsDuplicate(r1, r2 RR) bool { 10 // Check whether the record header is identical. 11 if !r1.Header().isDuplicate(r2.Header()) { 12 return false 13 } 14 15 // Check whether the RDATA is identical. 16 return r1.isDuplicate(r2) 17} 18 19func (r1 *RR_Header) isDuplicate(_r2 RR) bool { 20 r2, ok := _r2.(*RR_Header) 21 if !ok { 22 return false 23 } 24 if r1.Class != r2.Class { 25 return false 26 } 27 if r1.Rrtype != r2.Rrtype { 28 return false 29 } 30 if !isDuplicateName(r1.Name, r2.Name) { 31 return false 32 } 33 // ignore TTL 34 return true 35} 36 37// isDuplicateName checks if the domain names s1 and s2 are equal. 38func isDuplicateName(s1, s2 string) bool { return equal(s1, s2) } 39