mirror of
https://github.com/andwati/dns-resolver.git
synced 2026-10-18 10:42:52 +00:00
37 lines
561 B
Go
37 lines
561 B
Go
package network
|
|
|
|
import (
|
|
"net"
|
|
"time"
|
|
)
|
|
|
|
func SendDNSQuery(query []byte, server string) ([]byte, error) {
|
|
conn, err := net.Dial("udp", server)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer func(conn net.Conn) {
|
|
err := conn.Close()
|
|
if err != nil {
|
|
|
|
}
|
|
}(conn)
|
|
|
|
err = conn.SetDeadline(time.Now().Add(DefaultTimeout))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if _, err := conn.Write(query); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
response := make([]byte, 512)
|
|
n, err := conn.Read(response)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return response[:n], nil
|
|
}
|