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chore: better parsing pure UDP DNS

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This commit is contained in:
Skyxim 2023-01-27 17:02:58 +08:00
parent d3193cf8b7
commit 0d62e42c50
1 changed files with 9 additions and 15 deletions
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24
config/config.go
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@ -936,28 +936,22 @@ func parseNameServer(servers []string, preferH3 bool) ([]dns.NameServer, error)
return nameservers, nil return nameservers, nil
} }
func parsePureDNSServer(server string) (string, bool) { func parsePureDNSServer(server string) string {
addPre := func(server string) string { addPre := func(server string) string {
return "udp://" + server return "udp://" + server
} }
//IPv6 server without "[" and "]" e.g., "2400:3200:baba::1" if ip,err := netip.ParseAddr(server); err != nil {
if strings.Count(server, ":") >= 2 && strings.Count(server, "[") == 0 && strings.Count(server, "]") == 0 {
server = "[" + server + "]:53"
}
if ip := net.ParseIP(server); ip == nil {
// parse without scheme .e.g 8.8.8.8:53
if strings.Contains(server, "://") { if strings.Contains(server, "://") {
return server, true return server
}
if addr, err := net.ResolveUDPAddr("", server); err == nil {
return addPre(addr.String()), true
} else {
return addPre(server), false
} }
return addPre(server)
} else { } else {
return addPre(server), true if ip.Is4(){
return addPre(server)
}else{
return addPre("["+server+"]")
}
} }
} }
func parseNameServerPolicy(nsPolicy map[string]string, preferH3 bool) (map[string]dns.NameServer, error) { func parseNameServerPolicy(nsPolicy map[string]string, preferH3 bool) (map[string]dns.NameServer, error) {