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Workaround bug https://github.com/miekg/dns/pull/530

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This commit is contained in:
Star Brilliant 2017-10-04 12:54:05 +08:00
parent e8c90ea86f
commit dd627b2407
1 changed files with 5 additions and 1 deletions
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6
json-dns/marshal.go
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@ -78,8 +78,12 @@ func Marshal(msg *dns.Msg) *Response {
for _, option := range opt.Option {
if option.Option() == dns.EDNS0SUBNET {
edns0 := option.(*dns.EDNS0_SUBNET)
clientAddress := edns0.Address
if clientAddress == nil {
clientAddress = net.IPv4(0, 0, 0, 0)
}
scopeMask := net.CIDRMask(int(edns0.SourceScope), len(edns0.Address))
resp.EdnsClientSubnet = edns0.Address.Mask(scopeMask).String() + "/" + strconv.Itoa(int(edns0.SourceScope))
resp.EdnsClientSubnet = clientAddress.Mask(scopeMask).String() + "/" + strconv.Itoa(int(edns0.SourceScope))
}
}
continue