diff options
| author |   David Lebrun <david.lebrun@uclouvain.be> | 2016-11-08 14:57:42 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-11-09 20:40:06 -0500 |
| commit | bf355b8d2c30a289232042cacc1cfaea4923936c (patch) | |
| tree | e7f1a5472ac6ac4c5b6c46ff4fe54d9bb9c4ab0f /include/net/seg6.h | |
| parent | ipv6: sr: add support for SRH encapsulation and injection with lwtunnels (diff) | |
| download | linux-dev-bf355b8d2c30a289232042cacc1cfaea4923936c.tar.xz linux-dev-bf355b8d2c30a289232042cacc1cfaea4923936c.zip | |
ipv6: sr: add core files for SR HMAC support
This patch adds the necessary functions to compute and check the HMAC signature
of an SR-enabled packet. Two HMAC algorithms are supported: hmac(sha1) and
hmac(sha256).
In order to avoid dynamic memory allocation for each HMAC computation,
a per-cpu ring buffer is allocated for this purpose.
A new per-interface sysctl called seg6_require_hmac is added, allowing a
user-defined policy for processing HMAC-signed SR-enabled packets.
A value of -1 means that the HMAC field will always be ignored.
A value of 0 means that if an HMAC field is present, its validity will
be enforced (the packet is dropped is the signature is incorrect).
Finally, a value of 1 means that any SR-enabled packet that does not
contain an HMAC signature or whose signature is incorrect will be dropped.
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 | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/net/seg6.h b/include/net/seg6.h index ff5da0ce83e9..4e0357517d79 100644 --- a/include/net/seg6.h +++ b/include/net/seg6.h @@ -18,6 +18,7 @@ #include <linux/ipv6.h> #include <net/lwtunnel.h> #include <linux/seg6.h> +#include <linux/rhashtable.h> static inline void update_csum_diff4(struct sk_buff *skb, __be32 from, __be32 to) @@ -41,6 +42,9 @@ static inline void update_csum_diff16(struct sk_buff *skb, __be32 *from, struct seg6_pernet_data { struct mutex lock; struct in6_addr __rcu *tun_src; +#ifdef CONFIG_IPV6_SEG6_HMAC + struct rhashtable hmac_infos; +#endif }; static inline struct seg6_pernet_data *seg6_pernet(struct net *net) |