1package dns 2 3// NameUsed sets the RRs in the prereq section to 4// "Name is in use" RRs. RFC 2136 section 2.4.4. 5func (u *Msg) NameUsed(rr []RR) { 6 if u.Answer == nil { 7 u.Answer = make([]RR, 0, len(rr)) 8 } 9 for _, r := range rr { 10 u.Answer = append(u.Answer, &ANY{Hdr: RR_Header{Name: r.Header().Name, Ttl: 0, Rrtype: TypeANY, Class: ClassANY}}) 11 } 12} 13 14// NameNotUsed sets the RRs in the prereq section to 15// "Name is in not use" RRs. RFC 2136 section 2.4.5. 16func (u *Msg) NameNotUsed(rr []RR) { 17 if u.Answer == nil { 18 u.Answer = make([]RR, 0, len(rr)) 19 } 20 for _, r := range rr { 21 u.Answer = append(u.Answer, &ANY{Hdr: RR_Header{Name: r.Header().Name, Ttl: 0, Rrtype: TypeANY, Class: ClassNONE}}) 22 } 23} 24 25// Used sets the RRs in the prereq section to 26// "RRset exists (value dependent -- with rdata)" RRs. RFC 2136 section 2.4.2. 27func (u *Msg) Used(rr []RR) { 28 if len(u.Question) == 0 { 29 panic("dns: empty question section") 30 } 31 if u.Answer == nil { 32 u.Answer = make([]RR, 0, len(rr)) 33 } 34 for _, r := range rr { 35 hdr := r.Header() 36 hdr.Class = u.Question[0].Qclass 37 hdr.Ttl = 0 38 u.Answer = append(u.Answer, r) 39 } 40} 41 42// RRsetUsed sets the RRs in the prereq section to 43// "RRset exists (value independent -- no rdata)" RRs. RFC 2136 section 2.4.1. 44func (u *Msg) RRsetUsed(rr []RR) { 45 if u.Answer == nil { 46 u.Answer = make([]RR, 0, len(rr)) 47 } 48 for _, r := range rr { 49 h := r.Header() 50 u.Answer = append(u.Answer, &ANY{Hdr: RR_Header{Name: h.Name, Ttl: 0, Rrtype: h.Rrtype, Class: ClassANY}}) 51 } 52} 53 54// RRsetNotUsed sets the RRs in the prereq section to 55// "RRset does not exist" RRs. RFC 2136 section 2.4.3. 56func (u *Msg) RRsetNotUsed(rr []RR) { 57 if u.Answer == nil { 58 u.Answer = make([]RR, 0, len(rr)) 59 } 60 for _, r := range rr { 61 h := r.Header() 62 u.Answer = append(u.Answer, &ANY{Hdr: RR_Header{Name: h.Name, Ttl: 0, Rrtype: h.Rrtype, Class: ClassNONE}}) 63 } 64} 65 66// Insert creates a dynamic update packet that adds an complete RRset, see RFC 2136 section 2.5.1. 67func (u *Msg) Insert(rr []RR) { 68 if len(u.Question) == 0 { 69 panic("dns: empty question section") 70 } 71 if u.Ns == nil { 72 u.Ns = make([]RR, 0, len(rr)) 73 } 74 for _, r := range rr { 75 r.Header().Class = u.Question[0].Qclass 76 u.Ns = append(u.Ns, r) 77 } 78} 79 80// RemoveRRset creates a dynamic update packet that deletes an RRset, see RFC 2136 section 2.5.2. 81func (u *Msg) RemoveRRset(rr []RR) { 82 if u.Ns == nil { 83 u.Ns = make([]RR, 0, len(rr)) 84 } 85 for _, r := range rr { 86 h := r.Header() 87 u.Ns = append(u.Ns, &ANY{Hdr: RR_Header{Name: h.Name, Ttl: 0, Rrtype: h.Rrtype, Class: ClassANY}}) 88 } 89} 90 91// RemoveName creates a dynamic update packet that deletes all RRsets of a name, see RFC 2136 section 2.5.3 92func (u *Msg) RemoveName(rr []RR) { 93 if u.Ns == nil { 94 u.Ns = make([]RR, 0, len(rr)) 95 } 96 for _, r := range rr { 97 u.Ns = append(u.Ns, &ANY{Hdr: RR_Header{Name: r.Header().Name, Ttl: 0, Rrtype: TypeANY, Class: ClassANY}}) 98 } 99} 100 101// Remove creates a dynamic update packet deletes RR from a RRSset, see RFC 2136 section 2.5.4 102func (u *Msg) Remove(rr []RR) { 103 if u.Ns == nil { 104 u.Ns = make([]RR, 0, len(rr)) 105 } 106 for _, r := range rr { 107 h := r.Header() 108 h.Class = ClassNONE 109 h.Ttl = 0 110 u.Ns = append(u.Ns, r) 111 } 112} 113