diff options
| author | Pravin B Shelar <pshelar@nicira.com> | 2013-06-17 17:49:38 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-06-19 18:07:40 -0700 |
| commit | bda7bb46343647f68591366731295a0f3eea59ed (patch) | |
| tree | 99fa502fe0439a7776227238bfc3a5b0d4dbe7b3 /include | |
| parent | 20fd4d1f04da07d09192ad8ad366a70d5125bfaf (diff) | |
gre: Allow multiple protocol listener for gre protocol.
Currently there is only one user is allowed to register for gre
protocol. Following patch adds de-multiplexer. So that multiple
modules can listen on gre protocol e.g. kernel gre devices and ovs.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/gre.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/net/gre.h b/include/net/gre.h index 9f03a390c82..c6ea0c72c60 100644 --- a/include/net/gre.h +++ b/include/net/gre.h @@ -7,6 +7,7 @@ #define GREPROTO_CISCO 0 #define GREPROTO_PPTP 1 #define GREPROTO_MAX 2 +#define GRE_IP_PROTO_MAX 2 struct gre_protocol { int (*handler)(struct sk_buff *skb); @@ -22,6 +23,29 @@ struct gre_base_hdr { int gre_add_protocol(const struct gre_protocol *proto, u8 version); int gre_del_protocol(const struct gre_protocol *proto, u8 version); +struct gre_cisco_protocol { + int (*handler)(struct sk_buff *skb, const struct tnl_ptk_info *tpi); + int (*err_handler)(struct sk_buff *skb, u32 info, + const struct tnl_ptk_info *tpi); + u8 priority; +}; + +int gre_cisco_register(struct gre_cisco_protocol *proto); +int gre_cisco_unregister(struct gre_cisco_protocol *proto); + +static inline int ip_gre_calc_hlen(__be16 o_flags) +{ + int addend = 4; + + if (o_flags&TUNNEL_CSUM) + addend += 4; + if (o_flags&TUNNEL_KEY) + addend += 4; + if (o_flags&TUNNEL_SEQ) + addend += 4; + return addend; +} + static inline __be16 gre_flags_to_tnl_flags(__be16 flags) { __be16 tflags = 0; |