| 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. Return true |
| // is 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) } |