From d1b0d1f13304e5adad5ce9ea594c331b25ecc4b7 Mon Sep 17 00:00:00 2001
From: Bot Git <bot@example.com>
Date: Tue, 2 Nov 2021 09:03:41 +0800
Subject: [PATCH] fix ipv6 doh-ip

---
 network/dns_resolver.go | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/network/dns_resolver.go b/network/dns_resolver.go
index 23a4c37..424c7ae 100644
--- a/network/dns_resolver.go
+++ b/network/dns_resolver.go
@@ -1,6 +1,8 @@
 package network
 
 import (
+	"fmt"
+	"net"
 	"net/http"
 	"sync"
 	"time"
@@ -83,8 +85,13 @@ func (d *dnsResolver) LookupAAAA(hostname string) []string {
 	return ips
 }
 
-func newDNSResolver(hostname string, httpClient *http.Client) *dnsResolver {
-	return &dnsResolver{
+func newDNSResolver(hostname string, httpClient *http.Client) (ret *dnsResolver) {
+	if net.ParseIP(hostname).To4() == nil {
+		// the hostname is an IPv6 address
+		hostname = fmt.Sprintf("[%s]", hostname)
+	}
+
+	ret = &dnsResolver{
 		resolver: doh.Resolver{
 			Host:       hostname,
 			Class:      doh.IN,
@@ -92,4 +99,6 @@ func newDNSResolver(hostname string, httpClient *http.Client) *dnsResolver {
 		},
 		cache: map[string]dnsResolverCacheEntry{},
 	}
+
+	return
 }