• James Chapman's avatar
    [UDP]: Introduce UDP encapsulation type for L2TP · 342f0234
    James Chapman authored
    This patch adds a new UDP_ENCAP_L2TPINUDP encapsulation type for UDP
    sockets. When a UDP socket's encap_type is UDP_ENCAP_L2TPINUDP, the
    skb is delivered to a function pointed to by the udp_sock's
    encap_rcv funcptr. If the skb isn't wanted by L2TP, it returns >0, which
    causes it to be passed through to UDP.
    
    Include padding to put the new encap_rcv field on a 4-byte boundary.
    
    Previously, the only user of UDP encap sockets was ESP, so when
    CONFIG_XFRM was not defined, some of the encap code was compiled
    out. This patch changes that. As a result, udp_encap_rcv() will
    now do a little more work when CONFIG_XFRM is not defined.
    Signed-off-by: default avatarJames Chapman <jchapman@katalix.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    342f0234
udp.c 43.9 KB