/*
Cname:src.iduwpui.qiniudns.com. 572 IN CNAME nb-gate-io-src.qiniu.com.
A:nb-gate-io-src.qiniu.com. 171 IN A 101.71.123.5
A:nb-gate-io-src.qiniu.com. 171 IN A 101.71.123.23
A:nb-gate-io-src.qiniu.com. 171 IN A 101.71.123.6
A:nb-gate-io-src.qiniu.com. 171 IN A 101.71.123.7
A:nb-gate-io-src.qiniu.com. 171 IN A 101.71.123.8
A:nb-gate-io-src.qiniu.com. 171 IN A 101.71.123.21
;; opcode: QUERY, status: NOERROR, id: 30362
;; flags: qr ra; QUERY: 1, ANSWER: 7, AUTHORITY: 2, ADDITIONAL: 12
;; QUESTION SECTION:
;src.iduwpui.qiniudns.com. IN A
;; ANSWER SECTION:
src.iduwpui.qiniudns.com. 572 IN CNAME nb-gate-io-src.qiniu.com.
nb-gate-io-src.qiniu.com. 171 IN A 101.71.123.5
nb-gate-io-src.qiniu.com. 171 IN A 101.71.123.23
nb-gate-io-src.qiniu.com. 171 IN A 101.71.123.6
nb-gate-io-src.qiniu.com. 171 IN A 101.71.123.7
nb-gate-io-src.qiniu.com. 171 IN A 101.71.123.8
nb-gate-io-src.qiniu.com. 171 IN A 101.71.123.21
;; AUTHORITY SECTION:
qiniu.com. 30674 IN NS ns3.dnsv5.com.
qiniu.com. 30674 IN NS ns4.dnsv5.com.
;; ADDITIONAL SECTION:
ns3.dnsv5.com. 95697 IN A 121.51.2.171
ns3.dnsv5.com. 95697 IN A 125.39.213.190
ns3.dnsv5.com. 95697 IN A 180.153.10.169
ns3.dnsv5.com. 95697 IN A 182.140.167.191
ns3.dnsv5.com. 95697 IN A 183.60.57.192
ns3.dnsv5.com. 95697 IN A 183.60.59.217
ns3.dnsv5.com. 95697 IN A 184.105.206.63
ns3.dnsv5.com. 95697 IN A 112.90.143.36
ns3.dnsv5.com. 95697 IN A 115.236.151.180
ns3.dnsv5.com. 95697 IN A 117.135.170.109
ns3.dnsv5.com. 95697 IN A 119.28.48.224
ns3.dnsv5.com. 95697 IN A 119.167.195.9
*/
func main() {
config := new(dns.ClientConfig)
config.Servers = make([]string, 0)
config.Search = make([]string, 0)
config.Port = "53"
config.Ndots = 1
config.Timeout = 5
config.Attempts = 2
// localdns := "127.0.0.1"
localdns := "202.96.64.68"
//localdns := "114.114.114.114"
config.Servers = append(config.Servers, localdns)
c := &dns.Client{
DialTimeout: time.Second,
}
// query := "www.a.shifen.com."
query := "src.iduwpui.qiniudns.com"
m := new(dns.Msg)
m.SetQuestion(dns.Fqdn(query), dns.TypeA)
m.RecursionDesired = false
r, _, err := c.Exchange(m, net.JoinHostPort(config.Servers[0], config.Port))
if r == nil {
log.Fatalf("*** error: %s\n", err.Error())
}
if r.Rcode != dns.RcodeSuccess {
log.Fatalf(" *** invalid answer name %s after MX query for %s\n", query, query)
}
// Stuff must be in the answer section
for _, a := range r.Answer {
if a.Header().Rrtype == dns.TypeA {
fmt.Printf("A:%v\n", a)
} else {
fmt.Printf("Cname:%v\n", a)
}
}
fmt.Println(r.String())
}
