31 lines
715 B
Go
31 lines
715 B
Go
// +build !windows
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package config
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import (
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"net"
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"github.com/miekg/dns"
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)
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// DefaultResolvConfPath specifies path to default resolv config file on UNIX.
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const DefaultResolvConfPath = "/etc/resolv.conf"
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// GetDefaultServers get system default nameserver
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func GetDefaultServers() ([]string, int, []string, error) {
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// if no nameserver is provided, take it from `resolv.conf`
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cfg, err := dns.ClientConfigFromFile(DefaultResolvConfPath)
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if err != nil {
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return nil, 0, nil, err
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}
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servers := make([]string, 0)
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for _, server := range cfg.Servers {
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ip := net.ParseIP(server)
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if isUnicastLinkLocal(ip) {
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continue
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}
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servers = append(servers, server)
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}
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return servers, cfg.Ndots, cfg.Search, nil
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}
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