func newConnMsg(qname, nameserver string, attempts int, qtype, qclass uint16, aa, ad, cd, rd, dnssec, nsid bool) (*dns.Conn, *dns.Msg) {
d := new(dns.Conn)
d.RemoteAddr = nameserver
d.Attempts = attempts
m := new(dns.Msg)
m.MsgHdr.Authoritative = aa
m.MsgHdr.AuthenticatedData = ad
m.MsgHdr.CheckingDisabled = cd
m.MsgHdr.RecursionDesired = rd
m.Question = make([]dns.Question, 1)
if dnssec || nsid {
opt := new(dns.RR_OPT)
opt.SetDo()
opt.SetVersion(0)
opt.SetUDPSize(dns.DefaultMsgSize)
if nsid {
opt.SetNsid("")
}
m.Extra = make([]dns.RR, 1)
m.Extra[0] = opt
}
m.Question[0] = dns.Question{qname, qtype, qclass}
m.Id = dns.Id()
return d, m
}
