forked from Minki/linux
c544193214
Following patch refactors GRE code into ip tunneling code and GRE specific code. Common tunneling code is moved to ip_tunnel module. ip_tunnel module is written as generic library which can be used by different tunneling implementations. ip_tunnel module contains following components: - packet xmit and rcv generic code. xmit flow looks like (gre_xmit/ipip_xmit)->ip_tunnel_xmit->ip_local_out. - hash table of all devices. - lookup for tunnel devices. - control plane operations like device create, destroy, ioctl, netlink operations code. - registration for tunneling modules, like gre, ipip etc. - define single pcpu_tstats dev->tstats. - struct tnl_ptk_info added to pass parsed tunnel packet parameters. ipip.h header is renamed to ip_tunnel.h Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
#ifndef __LINUX_GRE_H
|
|
#define __LINUX_GRE_H
|
|
|
|
#include <linux/skbuff.h>
|
|
#include <net/ip_tunnels.h>
|
|
|
|
#define GREPROTO_CISCO 0
|
|
#define GREPROTO_PPTP 1
|
|
#define GREPROTO_MAX 2
|
|
|
|
struct gre_protocol {
|
|
int (*handler)(struct sk_buff *skb);
|
|
void (*err_handler)(struct sk_buff *skb, u32 info);
|
|
};
|
|
|
|
struct gre_base_hdr {
|
|
__be16 flags;
|
|
__be16 protocol;
|
|
};
|
|
#define GRE_HEADER_SECTION 4
|
|
|
|
int gre_add_protocol(const struct gre_protocol *proto, u8 version);
|
|
int gre_del_protocol(const struct gre_protocol *proto, u8 version);
|
|
|
|
static inline __be16 gre_flags_to_tnl_flags(__be16 flags)
|
|
{
|
|
__be16 tflags = 0;
|
|
|
|
if (flags & GRE_CSUM)
|
|
tflags |= TUNNEL_CSUM;
|
|
if (flags & GRE_ROUTING)
|
|
tflags |= TUNNEL_ROUTING;
|
|
if (flags & GRE_KEY)
|
|
tflags |= TUNNEL_KEY;
|
|
if (flags & GRE_SEQ)
|
|
tflags |= TUNNEL_SEQ;
|
|
if (flags & GRE_STRICT)
|
|
tflags |= TUNNEL_STRICT;
|
|
if (flags & GRE_REC)
|
|
tflags |= TUNNEL_REC;
|
|
if (flags & GRE_VERSION)
|
|
tflags |= TUNNEL_VERSION;
|
|
|
|
return tflags;
|
|
}
|
|
|
|
static inline __be16 tnl_flags_to_gre_flags(__be16 tflags)
|
|
{
|
|
__be16 flags = 0;
|
|
|
|
if (tflags & TUNNEL_CSUM)
|
|
flags |= GRE_CSUM;
|
|
if (tflags & TUNNEL_ROUTING)
|
|
flags |= GRE_ROUTING;
|
|
if (tflags & TUNNEL_KEY)
|
|
flags |= GRE_KEY;
|
|
if (tflags & TUNNEL_SEQ)
|
|
flags |= GRE_SEQ;
|
|
if (tflags & TUNNEL_STRICT)
|
|
flags |= GRE_STRICT;
|
|
if (tflags & TUNNEL_REC)
|
|
flags |= GRE_REC;
|
|
if (tflags & TUNNEL_VERSION)
|
|
flags |= GRE_VERSION;
|
|
|
|
return flags;
|
|
}
|
|
|
|
#endif
|