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| author | David Lebrun <david.lebrun@uclouvain.be> | 2016-11-08 14:57:41 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-11-09 20:40:06 -0500 |
| commit | 6c8702c60b88651072460f3f4026c7dfe2521d12 (patch) | |
| tree | 2ff901e3824bb605585e76c43739aa9b4b90ec39 /include/net/seg6.h | |
| parent | 915d7e5e5930b4f01d0971d93b9b25ed17d221aa (diff) | |
| download | linux-stable-6c8702c60b88651072460f3f4026c7dfe2521d12.tar.gz linux-stable-6c8702c60b88651072460f3f4026c7dfe2521d12.tar.bz2 linux-stable-6c8702c60b88651072460f3f4026c7dfe2521d12.zip | |
ipv6: sr: add support for SRH encapsulation and injection with lwtunnels
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: David Lebrun <david.lebrun@uclouvain.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/seg6.h')
| -rw-r--r-- | include/net/seg6.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/net/seg6.h b/include/net/seg6.h index 7c7b8ed39661..ff5da0ce83e9 100644 --- a/include/net/seg6.h +++ b/include/net/seg6.h @@ -16,6 +16,8 @@ #include <linux/net.h> #include <linux/ipv6.h> +#include <net/lwtunnel.h> +#include <linux/seg6.h> static inline void update_csum_diff4(struct sk_buff *skb, __be32 from, __be32 to) @@ -48,5 +50,9 @@ static inline struct seg6_pernet_data *seg6_pernet(struct net *net) extern int seg6_init(void); extern void seg6_exit(void); +extern int seg6_iptunnel_init(void); +extern void seg6_iptunnel_exit(void); + +extern bool seg6_validate_srh(struct ipv6_sr_hdr *srh, int len); #endif |