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authorDavid Lebrun <david.lebrun@uclouvain.be>2016-11-08 14:57:41 +0100
committerDavid S. Miller <davem@davemloft.net>2016-11-09 20:40:06 -0500
commit6c8702c60b88651072460f3f4026c7dfe2521d12 (patch)
tree2ff901e3824bb605585e76c43739aa9b4b90ec39 /include/net/seg6.h
parent915d7e5e5930b4f01d0971d93b9b25ed17d221aa (diff)
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.h6
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