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/*
* l2tp.h : L2TPv3 tunnel support
*
* Copyright (c) 2013 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __included_l2tp_h__
#define __included_l2tp_h__
#include <vlib/vlib.h>
#include <vnet/ip/ip.h>
#include <vnet/l2tp/packet.h>
typedef struct
{
/* ip6 addresses */
ip6_address_t our_address;
ip6_address_t client_address;
/* l2tpv3 header parameters */
u64 local_cookie[2];
u64 remote_cookie;
u32 local_session_id;
u32 remote_session_id;
/* tunnel interface */
u32 hw_if_index;
u32 sw_if_index;
/* fib index used for outgoing encapsulated packets */
u32 encap_fib_index;
u8 l2tp_hdr_size;
u8 l2_sublayer_present;
u8 cookie_flags; /* in host byte order */
u8 admin_up;
} l2t_session_t;
typedef enum
{
L2T_LOOKUP_SRC_ADDRESS = 0,
L2T_LOOKUP_DST_ADDRESS,
L2T_LOOKUP_SESSION_ID,
} ip6_to_l2_lookup_t;
typedef struct
{
/* session pool */
l2t_session_t *sessions;
/* ip6 -> l2 hash tables. Make up your minds, people... */
uword *session_by_src_address;
uword *session_by_dst_address;
uword *session_by_session_id;
ip6_to_l2_lookup_t lookup_type;
/* Counters */
vlib_combined_counter_main_t counter_main;
/* vector of free l2tpv3 tunnel interfaces */
u32 *free_l2tpv3_tunnel_hw_if_indices;
/* show device instance by real device instance */
u32 *dev_inst_by_real;
/* convenience */
vlib_main_t *vlib_main;
vnet_main_t *vnet_main;
bool proto_registered;
} l2t_main_t;
/* Packet trace structure */
typedef struct
{
int is_user_to_network;
u32 session_index;
ip6_address_t our_address;
ip6_address_t client_address;
} l2t_trace_t;
extern l2t_main_t l2t_main;
extern vlib_node_registration_t l2t_encap_node;
extern vlib_node_registration_t l2t_decap_node;
extern vlib_node_registration_t l2t_decap_local_node;
enum
{
SESSION_COUNTER_USER_TO_NETWORK = 0,
SESSION_COUNTER_NETWORK_TO_USER,
};
static inline u32
session_index_to_counter_index (u32 session_index, u32 counter_id)
{
return ((session_index << 1) + counter_id);
}
u8 *format_l2t_trace (u8 * s, va_list * args);
typedef struct
{
/* Any per-interface config would go here */
} ip6_l2tpv3_config_t;
uword unformat_pg_l2tp_header (unformat_input_t * input, va_list * args);
void l2tp_encap_init (vlib_main_t * vm);
int create_l2tpv3_ipv6_tunnel (l2t_main_t * lm,
ip6_address_t * client_address,
ip6_address_t * our_address,
u32 local_session_id,
u32 remote_session_id,
u64 local_cookie,
u64 remote_cookie,
int l2_sublayer_present,
u32 encap_fib_index, u32 * sw_if_index);
int l2tpv3_set_tunnel_cookies (l2t_main_t * lm,
u32 sw_if_index,
u64 new_local_cookie, u64 new_remote_cookie);
int l2tpv3_interface_enable_disable (vnet_main_t * vnm,
u32 sw_if_index, int enable_disable);
#endif /* __included_l2tp_h__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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