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Update client.go

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This commit is contained in:
xiaolunzhou 2020-12-07 19:51:02 +08:00
parent 1242f4b500
commit 5f8800d643
1 changed files with 6 additions and 9 deletions
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15
dns/client.go
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@ -5,7 +5,6 @@ import (
"encoding/base64"
"encoding/binary"
"errors"
"fmt"
"io"
"io/ioutil"
"net"
@ -156,7 +155,6 @@ func (c *Client) extractAnswer(resp *Message) ([]string, int) {
func (c *Client) exchange(qname string, reqBytes []byte, preferTCP bool) (
server, network, dialerAddr string, respBytes []byte, err error) {
ups := c.UpStream(qname)
fmt.Println(ups)
network = "tcp"
dialer := c.proxy.NextDialer(qname + ":53")
// if we are resolving the dialer's domain, then use Direct to avoid denpency loop
@ -191,11 +189,9 @@ func (c *Client) exchange(qname string, reqBytes []byte, preferTCP bool) (
network = "udp"
rc, err = dialer.Dial(network, server)
case "dot":
network="tcp"
rc,err=tls.Dial(network,server,&tls.Config{InsecureSkipVerify: false,})
rc,err=tls.Dial("tcp",server,&tls.Config{InsecureSkipVerify: false,})
case "doh":
net.DefaultResolver=&net.Resolver{}
network="doh"
default:
break
}
@ -207,14 +203,16 @@ func (c *Client) exchange(qname string, reqBytes []byte, preferTCP bool) (
continue
}
//TODO: if we use DOH (network=="doh") we don't need close connection
if network!="doh" {defer rc.Close()}
if network!="doh"{
defer rc.Close()
}
// TODO: support timeout setting for different upstream server
if c.config.Timeout > 0 && network!="doh" {
rc.SetDeadline(time.Now().Add(time.Duration(c.config.Timeout) * time.Second))
}
switch network {
switch op {
case "tcp","dot":
respBytes, err = c.exchangeTCP(rc, reqBytes)
case "udp":
@ -222,7 +220,6 @@ func (c *Client) exchange(qname string, reqBytes []byte, preferTCP bool) (
case "doh":
respBytes, err = c.exchangeHTTPS(server, reqBytes)
}
if err == nil {
break
}
@ -239,7 +236,7 @@ func (c *Client) exchange(qname string, reqBytes []byte, preferTCP bool) (
c.proxy.Record(dialer, false)
}
return server, network, dialer.Addr(), respBytes, err
return server, op, dialer.Addr(), respBytes, err
}
//exchangeHTTP exchange with server over https
func (c*Client) exchangeHTTPS(server string,reqBytes[]byte)(body[]byte,err error){