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Replace multiple "resolver.*" fn cals with single "dns.Exchange()" fn.
This highly simplify resolving DNS code. Also, DNS will work only for IPv4 Signed-off-by: Yevhen Vydolob <[email protected]> Co-authored-by: Christophe Fergeau <[email protected]>
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,22 @@ | ||
//go:build !windows | ||
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package dns | ||
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import ( | ||
"fmt" | ||
"os" | ||
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"github.com/miekg/dns" | ||
) | ||
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func GetDNSHostAndPort() (string, string, error) { | ||
conf, err := dns.ClientConfigFromFile("/etc/resolv.conf") | ||
if err != nil { | ||
fmt.Fprintln(os.Stderr, err) | ||
return "", "", err | ||
} | ||
// TODO: use all configured nameservers, instead just first one | ||
nameserver := conf.Servers[0] | ||
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return nameserver, conf.Port, nil | ||
} |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,26 @@ | ||
//go:build windows | ||
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package dns | ||
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import ( | ||
"net/netip" | ||
"strconv" | ||
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qdmDns "github.com/qdm12/dns/v2/pkg/nameserver" | ||
) | ||
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func GetDNSHostAndPort() (string, string, error) { | ||
nameservers := qdmDns.GetDNSServers() | ||
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var nameserver netip.AddrPort | ||
for _, n := range nameservers { | ||
// return first non ipv6 nameserver | ||
if n.Addr().Is4() { | ||
nameserver = n | ||
break | ||
} | ||
} | ||
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return nameserver.Addr().String(), strconv.Itoa(int(nameserver.Port())), nil | ||
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} |
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