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net.LookupIP may cause deadlock in windows

Browse Source 
https://github.com/golang/go/issues/24178
This commit is contained in:
boboan
2018-07-12 10:21:28 +08:00
parent dd355b5d98
commit 907dec42e0
3 changed files with 28 additions and 3 deletions
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2
services/http/http.go
View File

@ -492,7 +492,7 @@ func (s *HTTP) IsDeadLoop(inLocalAddr string, host string) bool {
if *s.cfg.DNSAddress != "" {
outIPs = []net.IP{net.ParseIP(s.Resolve(outDomain))}
} else {
outIPs, err = net.LookupIP(outDomain)
outIPs, err = utils.MyLookupIP(outDomain)
}
if err == nil {
for _, ip := range outIPs {

2
services/socks/socks.go
View File

@ -598,7 +598,7 @@ func (s *Socks) IsDeadLoop(inLocalAddr string, host string) bool {
if *s.cfg.DNSAddress != "" {
outIPs = []net.IP{net.ParseIP(s.Resolve(outDomain))}
} else {
outIPs, err = net.LookupIP(outDomain)
outIPs, err = utils.MyLookupIP(outDomain)
}
if err == nil {
for _, ip := range outIPs {

27
utils/functions.go
View File

@ -25,6 +25,7 @@ import (
"strconv"
"strings"
"time"
"context"
"github.com/snail007/goproxy/utils/id"
@ -497,7 +498,7 @@ func IsIternalIP(domainOrIP string, always bool) bool {
}
if isDomain {
outIPs, err = net.LookupIP(domainOrIP)
outIPs, err = MyLookupIP(domainOrIP)
} else {
outIPs = []net.IP{net.ParseIP(domainOrIP)}
}
@ -632,3 +633,27 @@ func InsertProxyHeaders(head []byte, headers string) []byte {
// }
// return
// }
/*
net.LookupIP may cause deadlock in windows
https://github.com/golang/go/issues/24178
*/
func MyLookupIP(host string) ([]net.IP, error) {
ctx ,cancel := context.WithTimeout(context.Background(),time.Second *time.Duration(3))
defer func() {
cancel()
//ctx.Done()
}()
addrs, err := net.DefaultResolver.LookupIPAddr(ctx, host)
if err != nil {
return nil, err
}
ips := make([]net.IP, len(addrs))
for i, ia := range addrs {
ips[i] = ia.IP
}
return ips, nil
}