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Feature: can set custom interface for dns nameserver (#2126)

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Hongqi Yu 2022-06-01 10:50:54 +08:00 committed by GitHub
parent 9d2fc976e2
commit c1285adbf8
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 15 additions and 5 deletions
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5
config/config.go
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@ -477,6 +477,10 @@ func parseNameServer(servers []string) ([]dns.NameServer, error) {
return nil, fmt.Errorf("DNS NameServer[%d] format error: %s", idx, err.Error()) return nil, fmt.Errorf("DNS NameServer[%d] format error: %s", idx, err.Error())
} }
// parse with specific interface
// .e.g 10.0.0.1#en0
interfaceName := u.Fragment
var addr, dnsNetType string var addr, dnsNetType string
switch u.Scheme { switch u.Scheme {
case "udp": case "udp":
@ -508,6 +512,7 @@ func parseNameServer(servers []string) ([]dns.NameServer, error) {
dns.NameServer{ dns.NameServer{
Net: dnsNetType, Net: dnsNetType,
Addr: addr, Addr: addr,
Interface: interfaceName,
}, },
) )
} }

9
dns/doh.go
View file

@ -79,7 +79,7 @@ func (dc *dohClient) doRequest(req *http.Request) (msg *D.Msg, err error) {
return msg, err return msg, err
} }
func newDoHClient(url string, r *Resolver) *dohClient { func newDoHClient(url, iface string, r *Resolver) *dohClient {
return &dohClient{ return &dohClient{
url: url, url: url,
transport: &http.Transport{ transport: &http.Transport{
@ -95,7 +95,12 @@ func newDoHClient(url string, r *Resolver) *dohClient {
return nil, err return nil, err
} }
return dialer.DialContext(ctx, "tcp", net.JoinHostPort(ip.String(), port)) options := []dialer.Option{}
if iface != "" {
options = append(options, dialer.WithInterface(iface))
}
return dialer.DialContext(ctx, "tcp", net.JoinHostPort(ip.String(), port), options...)
}, },
}, },
} }

2
dns/util.go
View file

@ -51,7 +51,7 @@ func transform(servers []NameServer, resolver *Resolver) []dnsClient {
for _, s := range servers { for _, s := range servers {
switch s.Net { switch s.Net {
case "https": case "https":
ret = append(ret, newDoHClient(s.Addr, resolver)) ret = append(ret, newDoHClient(s.Addr, s.Interface, resolver))
continue continue
case "dhcp": case "dhcp":
ret = append(ret, newDHCPClient(s.Addr)) ret = append(ret, newDHCPClient(s.Addr))