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fix icmp

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This commit is contained in:
Alex Tsai 2021-04-20 17:51:20 +08:00
parent 84f8859f0f
commit ae636fa84e
1 changed files with 32 additions and 10 deletions
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26
server/server.go
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@ -45,7 +45,12 @@ func Start(config config.Config) {
continue
}
iface.Write(b)
key := srcAddr(b) + "-" + dstAddr(b)
srcAddr := srcAddr(b)
dstAddr := dstAddr(b)
if srcAddr == "" || dstAddr == "" {
continue
}
key := srcAddr + "-" + dstAddr
forwarder.connCache.Set(key, cliAddr, cache.DefaultExpiration)
}
}
@ -66,7 +71,12 @@ func (f *Forwarder) forward(iface *water.Interface, conn *net.UDPConn) {
if !waterutil.IsIPv4(b) {
continue
}
key := dstAddr(b) + "-" + srcAddr(b)
dstAddr := dstAddr(b)
srcAddr := srcAddr(b)
if dstAddr == "" || srcAddr == "" {
continue
}
key := dstAddr + "-" + srcAddr
v, ok := f.connCache.Get(key)
if ok {
// encrypt data
@ -77,15 +87,27 @@ func (f *Forwarder) forward(iface *water.Interface, conn *net.UDPConn) {
}
func srcAddr(b []byte) string {
if waterutil.IPv4Protocol(b) == waterutil.UDP || waterutil.IPv4Protocol(b) == waterutil.TCP {
ip := waterutil.IPv4Source(b)
port := waterutil.IPv4SourcePort(b)
addr := fmt.Sprintf("%s:%d", ip.To4().String(), port)
return addr
} else if waterutil.IPv4Protocol(b) == waterutil.ICMP {
ip := waterutil.IPv4Source(b)
return ip.To4().String()
}
return ""
}
func dstAddr(b []byte) string {
if waterutil.IPv4Protocol(b) == waterutil.UDP || waterutil.IPv4Protocol(b) == waterutil.TCP {
ip := waterutil.IPv4Destination(b)
port := waterutil.IPv4DestinationPort(b)
addr := fmt.Sprintf("%s:%d", ip.To4().String(), port)
return addr
} else if waterutil.IPv4Protocol(b) == waterutil.ICMP {
ip := waterutil.IPv4Destination(b)
return ip.To4().String()
}
return ""
}