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authorPravin B Shelar <pshelar@nicira.com>2013-06-18 04:49:38 +0400
committerDavid S. Miller <davem@davemloft.net>2013-06-20 05:07:40 +0400
commitbda7bb46343647f68591366731295a0f3eea59ed (patch)
tree99fa502fe0439a7776227238bfc3a5b0d4dbe7b3 /include/net/gre.h
parent20fd4d1f04da07d09192ad8ad366a70d5125bfaf (diff)
downloadlinux-bda7bb46343647f68591366731295a0f3eea59ed.tar.xz
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/net/gre.h')
-rw-r--r--include/net/gre.h24
1 files changed, 24 insertions, 0 deletions
diff --git a/include/net/gre.h b/include/net/gre.h
index 9f03a390c826..c6ea0c72c605 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;