[Openswan Users] {Spam?}a doubt about freeswan's source

[=?gb2312?B?dHBs?=]

    I have a doubt about freeswan's source.I found that after the IPSEC ESTABLISHED,I¡¡recived a packet from the peer by VPN.
    When this packet goes to the ESP protocol's function ipsec_rcv,the packet's dev has been changed to ipsec*.I think it should be my physic dev.I can not fount when it become ipsec*.Can you tell me when and how it become ipsec*??
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