• David Lebrun's avatar
    ipv6: sr: add support for SRH encapsulation and injection with lwtunnels · 6c8702c6
    David Lebrun authored
    This patch creates a new type of interfaceless lightweight tunnel (SEG6),
    enabling the encapsulation and injection of SRH within locally emitted
    packets and forwarded packets.
    
    >From a configuration viewpoint, a seg6 tunnel would be configured as follows:
    
      ip -6 ro ad fc00::1/128 encap seg6 mode encap segs fc42::1,fc42::2,fc42::3 dev eth0
    
    Any packet whose destination address is fc00::1 would thus be encapsulated
    within an outer IPv6 header containing the SRH with three segments, and would
    actually be routed to the first segment of the list. If `mode inline' was
    specified instead of `mode encap', then the SRH would be directly inserted
    after the IPv6 header without outer encapsulation.
    
    The inline mode is only available if CONFIG_IPV6_SEG6_INLINE is enabled. This
    feature was made configurable because direct header insertion may break
    several mechanisms such as PMTUD or IPSec AH.
    Signed-off-by: default avatarDavid Lebrun <david.lebrun@uclouvain.be>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    6c8702c6
lwtunnel.c 7.02 KB