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Add support for IPV6 in dns resolvers

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This commit is contained in:
Manuel de Brito Fontes 2016-12-22 00:00:27 -03:00
parent 8e90fc0290
commit 99209ad33d
10 changed files with 153 additions and 16 deletions
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16
core/pkg/net/dns/dns.go
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@ -18,15 +18,18 @@ package dns
import (
"io/ioutil"
"net"
"strings"
"github.com/golang/glog"
)
var defResolvConf = "/etc/resolv.conf"
// GetSystemNameServers returns the list of nameservers located in the file /etc/resolv.conf
func GetSystemNameServers() ([]string, error) {
var nameservers []string
file, err := ioutil.ReadFile("/etc/resolv.conf")
func GetSystemNameServers() ([]net.IP, error) {
var nameservers []net.IP
file, err := ioutil.ReadFile(defResolvConf)
if err != nil {
return nameservers, err
}
@ -43,10 +46,13 @@ func GetSystemNameServers() ([]string, error) {
continue
}
if fields[0] == "nameserver" {
nameservers = append(nameservers, fields[1:]...)
ip := net.ParseIP(fields[1])
if ip != nil {
nameservers = append(nameservers, ip)
}
}
}
glog.V(3).Infof("nameservers to use: %v", nameservers)
glog.V(3).Infof("nameservers IP address/es to use: %v", nameservers)
return nameservers, nil
}