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 r.Header().Class = u.Question[0].Qclass 36 u.Answer = append(u.Answer, r) 37 } 38} 39 40// RRsetUsed sets the RRs in the prereq section to 41// "RRset exists (value independent -- no rdata)" RRs. RFC 2136 section 2.4.1. 42func (u *Msg) RRsetUsed(rr []RR) { 43 if u.Answer == nil { 44 u.Answer = make([]RR, 0, len(rr)) 45 } 46 for _, r := range rr { 47 h := r.Header() 48 u.Answer = append(u.Answer, &ANY{Hdr: RR_Header{Name: h.Name, Ttl: 0, Rrtype: h.Rrtype, Class: ClassANY}}) 49 } 50} 51 52// RRsetNotUsed sets the RRs in the prereq section to 53// "RRset does not exist" RRs. RFC 2136 section 2.4.3. 54func (u *Msg) RRsetNotUsed(rr []RR) { 55 if u.Answer == nil { 56 u.Answer = make([]RR, 0, len(rr)) 57 } 58 for _, r := range rr { 59 h := r.Header() 60 u.Answer = append(u.Answer, &ANY{Hdr: RR_Header{Name: h.Name, Ttl: 0, Rrtype: h.Rrtype, Class: ClassNONE}}) 61 } 62} 63 64// Insert creates a dynamic update packet that adds an complete RRset, see RFC 2136 section 2.5.1. 65func (u *Msg) Insert(rr []RR) { 66 if len(u.Question) == 0 { 67 panic("dns: empty question section") 68 } 69 if u.Ns == nil { 70 u.Ns = make([]RR, 0, len(rr)) 71 } 72 for _, r := range rr { 73 r.Header().Class = u.Question[0].Qclass 74 u.Ns = append(u.Ns, r) 75 } 76} 77 78// RemoveRRset creates a dynamic update packet that deletes an RRset, see RFC 2136 section 2.5.2. 79func (u *Msg) RemoveRRset(rr []RR) { 80 if u.Ns == nil { 81 u.Ns = make([]RR, 0, len(rr)) 82 } 83 for _, r := range rr { 84 h := r.Header() 85 u.Ns = append(u.Ns, &ANY{Hdr: RR_Header{Name: h.Name, Ttl: 0, Rrtype: h.Rrtype, Class: ClassANY}}) 86 } 87} 88 89// RemoveName creates a dynamic update packet that deletes all RRsets of a name, see RFC 2136 section 2.5.3 90func (u *Msg) RemoveName(rr []RR) { 91 if u.Ns == nil { 92 u.Ns = make([]RR, 0, len(rr)) 93 } 94 for _, r := range rr { 95 u.Ns = append(u.Ns, &ANY{Hdr: RR_Header{Name: r.Header().Name, Ttl: 0, Rrtype: TypeANY, Class: ClassANY}}) 96 } 97} 98 99// Remove creates a dynamic update packet deletes RR from a RRSset, see RFC 2136 section 2.5.4 100func (u *Msg) Remove(rr []RR) { 101 if u.Ns == nil { 102 u.Ns = make([]RR, 0, len(rr)) 103 } 104 for _, r := range rr { 105 h := r.Header() 106 h.Class = ClassNONE 107 h.Ttl = 0 108 u.Ns = append(u.Ns, r) 109 } 110} 111