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fix: tunnel's handleUDPToLocal panic

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This commit is contained in:
wwqgtxx 2023-07-16 10:35:10 +08:00
parent 9cbca162a0
commit 9b50f56e7c
1 changed files with 7 additions and 4 deletions
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11
tunnel/connection.go
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@ -41,7 +41,13 @@ func handleUDPToLocal(writeBack C.WriteBack, pc N.EnhancePacketConn, key string,
}
fromUDPAddr, isUDPAddr := from.(*net.UDPAddr)
if isUDPAddr {
if !isUDPAddr {
fromUDPAddr = net.UDPAddrFromAddrPort(oAddrPort) // oAddrPort was Unmapped
log.Warnln("server return a [%T](%s) which isn't a *net.UDPAddr, force replace to (%s), this may be caused by a wrongly implemented server", from, from, oAddrPort)
} else if fromUDPAddr == nil {
fromUDPAddr = net.UDPAddrFromAddrPort(oAddrPort) // oAddrPort was Unmapped
log.Warnln("server return a nil *net.UDPAddr, force replace to (%s), this may be caused by a wrongly implemented server", oAddrPort)
} else {
_fromUDPAddr := *fromUDPAddr
fromUDPAddr = &_fromUDPAddr // make a copy
if fromAddr, ok := netip.AddrFromSlice(fromUDPAddr.IP); ok {
@ -54,9 +60,6 @@ func handleUDPToLocal(writeBack C.WriteBack, pc N.EnhancePacketConn, key string,
fromUDPAddr.Zone = "" // only ipv6 can have the zone
}
}
} else {
fromUDPAddr = net.UDPAddrFromAddrPort(oAddrPort) // oAddrPort was Unmapped
log.Warnln("server return a [%T](%s) which isn't a *net.UDPAddr, force replace to (%s), this may be caused by a wrongly implemented server", from, from, oAddrPort)
}
_, err = writeBack.WriteBack(data, fromUDPAddr)