• Tom Herbert's avatar
    fou: Support for foo-over-udp RX path · 23461551
    Tom Herbert authored
    This patch provides a receive path for foo-over-udp. This allows
    direct encapsulation of IP protocols over UDP. The bound destination
    port is used to map to an IP protocol, and the XFRM framework
    (udp_encap_rcv) is used to receive encapsulated packets. Upon
    reception, the encapsulation header is logically removed (pointer
    to transport header is advanced) and the packet is reinjected into
    the receive path with the IP protocol indicated by the mapping.
    
    Netlink is used to configure FOU ports. The configuration information
    includes the port number to bind to and the IP protocol corresponding
    to that port.
    
    This should support GRE/UDP
    (http://tools.ietf.org/html/draft-yong-tsvwg-gre-in-udp-encap-02),
    as will as the other IP tunneling protocols (IPIP, SIT).
    Signed-off-by: default avatarTom Herbert <therbert@google.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    23461551
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