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fix(socks5): should not dial returned bind addr directly

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When server returns an any ip (0.0.0.0 or [::0]), we should use conventional ip to replace the any ip given (0.0.0.0 or [::0]).
This behaviour adapts to most situations.

See v2fly/v2ray-core#523
This commit is contained in:
mzz2017 2020-12-16 15:46:54 +08:00
parent 226dd97d7d
commit 426291030a
1 changed files with 11 additions and 1 deletions
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12
proxy/socks5/client.go
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@ -86,7 +86,17 @@ func (s *Socks5) DialUDP(network, addr string) (pc net.PacketConn, writeTo net.A
return nil, nil, err
}
pc, nextHop, err := s.dialer.DialUDP(network, uAddr.String())
var uAddress string
h, p, _ := net.SplitHostPort(uAddr.String())
// if returned bind ip is unspecified
if ip := net.ParseIP(h); ip != nil && ip.IsUnspecified() {
// indicate using conventional addr
uAddress = net.JoinHostPort(s.addr, p)
} else {
uAddress = uAddr.String()
}
pc, nextHop, err := s.dialer.DialUDP(network, uAddress)
if err != nil {
log.F("[socks5] dialudp to %s error: %s", uAddr.String(), err)
return nil, nil, err