| Message ID | 20220628114949.5199-1-paolo.lungaroni@uniroma2.it (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | David Ahern |
| Headers | show |
| Series | [iproute2-next,v1] seg6: add support for SRv6 Headend Reduced Encapsulation | expand |
| Context | Check | Description |
|---|---|---|
| netdev/tree_selection | success | Not a local patch |
diff --git a/include/uapi/linux/seg6_iptunnel.h b/include/uapi/linux/seg6_iptunnel.h index ee6d1dd5..f2e47aad 100644 --- a/include/uapi/linux/seg6_iptunnel.h +++ b/include/uapi/linux/seg6_iptunnel.h @@ -35,6 +35,8 @@ enum { SEG6_IPTUN_MODE_INLINE, SEG6_IPTUN_MODE_ENCAP, SEG6_IPTUN_MODE_L2ENCAP, + SEG6_IPTUN_MODE_ENCAP_RED, + SEG6_IPTUN_MODE_L2ENCAP_RED, }; #endif diff --git a/ip/iproute_lwtunnel.c b/ip/iproute_lwtunnel.c index f4192229..8ffca4f9 100644 --- a/ip/iproute_lwtunnel.c +++ b/ip/iproute_lwtunnel.c @@ -135,6 +135,8 @@ static const char *seg6_mode_types[] = { [SEG6_IPTUN_MODE_INLINE] = "inline", [SEG6_IPTUN_MODE_ENCAP] = "encap", [SEG6_IPTUN_MODE_L2ENCAP] = "l2encap", + [SEG6_IPTUN_MODE_ENCAP_RED] = "encap.red", + [SEG6_IPTUN_MODE_L2ENCAP_RED] = "l2encap.red", }; static const char *format_seg6mode_type(int mode)
This patch adds the support for the reduced version of the H.Encaps and H.L2Encaps behaviors as defined in RFC 8986 [1]. H.Encaps.Red and H.L2Encaps.Red SRv6 behaviors are an optimization of the H.Encaps and H.L2Encaps aiming to reduce the length of the SID List carried in the pushed SRH. Specifically, the reduced version of the behaviors removes the first SID contained in the SID List (i.e. SRv6 Policy) by storing it into the IPv6 Destination Address. When SRv6 Policy is made of only one SID, the reduced version of the behaviors omits the SRH at all and pushes that SID directly into the IPv6 DA. Some examples: ip -6 route add 2001:db8::1 encap seg6 mode encap.red segs fcf0:1::e,fcf0:2::d6 dev eth0 ip -6 route add 2001:db8::2 encap seg6 mode l2encap.red segs fcf0:1::d2 dev eth0 Standard Output: ip -6 route show 2001:db8::1 2001:db8::1 encap seg6 mode encap.red segs 2 [ fcf0:1::e fcf0:2::d6 ] dev eth0 metric 1024 pref medium JSON Output: ip -6 -j -p route show 2001:db8::1 [ { "dst": "2001:db8::1", "encap": "seg6", "mode": "encap.red", "segs": [ "fcf0:1::e","fcf0:2::d6" ], "dev": "eth0", "metric": 1024, "flags": [ ], "pref": "medium" } ] [1] - https://datatracker.ietf.org/doc/html/rfc8986 Signed-off-by: Paolo Lungaroni <paolo.lungaroni@uniroma2.it> --- include/uapi/linux/seg6_iptunnel.h | 2 ++ ip/iproute_lwtunnel.c | 2 ++ 2 files changed, 4 insertions(+)