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/*
* ipip.h: types/functions for ipip.
*
* Copyright (c) 2018 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 aipiped 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_ipip_h
#define included_ipip_h
#include <vnet/adj/adj_types.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/ip/format.h>
#include <vnet/ip/ip.h>
#include <vnet/tunnel/tunnel.h>
extern vnet_hw_interface_class_t ipip_hw_interface_class;
#define foreach_ipip_error \
/* Must be first. */ \
_(DECAP_PKTS, "packets decapsulated") \
_(BAD_PROTOCOL, "bad protocol") \
_(NO_TUNNEL, "no tunnel") \
_(FRAGMENTED_PACKET, "fragmented outer packet")
typedef enum
{
#define _(sym, str) IPIP_ERROR_##sym,
foreach_ipip_error
#undef _
IPIP_N_ERROR,
} ipip_error_t;
/**
* @brief IPIP Tunnel key
*/
typedef enum
{
IPIP_TRANSPORT_IP4,
IPIP_TRANSPORT_IP6,
} __clib_packed ipip_transport_t;
typedef enum
{
IPIP_MODE_P2P = 0,
IPIP_MODE_P2MP,
IPIP_MODE_6RD,
} __clib_packed ipip_mode_t;
typedef struct
{
ip46_address_t src;
ip46_address_t dst;
u32 fib_index;
ipip_transport_t transport;
ipip_mode_t mode;
u16 __pad;
} __clib_packed ipip_tunnel_key_t;
STATIC_ASSERT_SIZEOF (ipip_tunnel_key_t, 5 * sizeof (u64));
/**
* @brief A representation of a IPIP tunnel
*/
typedef struct
{
/* Required for pool_get_aligned */
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
ipip_mode_t mode;
ipip_transport_t transport;
ip46_address_t tunnel_src;
ip46_address_t tunnel_dst;
u32 fib_index;
u32 hw_if_index;
u32 sw_if_index;
u32 dev_instance; /* Real device instance in tunnel vector */
u32 user_instance; /* Instance name being shown to user */
tunnel_encap_decap_flags_t flags;
ip_dscp_t dscp;
struct
{
ip6_address_t ip6_prefix;
ip4_address_t ip4_prefix;
u8 ip6_prefix_len;
u8 ip4_prefix_len;
u8 shift;
bool security_check;
u32 ip6_fib_index;
} sixrd;
} ipip_tunnel_t;
typedef struct
{
ipip_tunnel_t *tunnels;
uword *tunnel_by_key;
u32 *tunnel_index_by_sw_if_index;
/* convenience */
vlib_main_t *vlib_main;
vnet_main_t *vnet_main;
/* Record used instances */
uword *instance_used;
bool ip4_protocol_registered;
bool ip6_protocol_registered;
u16 msg_id_base;
} ipip_main_t;
extern ipip_main_t ipip_main;
extern vlib_node_registration_t ipip4_input_node;
extern vlib_node_registration_t ipip6_input_node;
/*
* sixrd_get_addr_net
*/
static_always_inline u32
sixrd_get_addr_net (const ipip_tunnel_t * t, u64 dal)
{
/* 1:1 mode */
if (t->sixrd.ip4_prefix_len == 32)
return (t->sixrd.ip4_prefix.as_u32);
dal = clib_net_to_host_u64 (dal);
/* Grab 32 - ip4_prefix_len bits out of IPv6 address from offset
* ip6_prefix_len */
u32 mask = ~(~0ULL << (32 - t->sixrd.ip4_prefix_len));
u32 ip4 =
clib_net_to_host_u32 (t->sixrd.
ip4_prefix.as_u32) | ((u32) (dal >> t->sixrd.
shift) & mask);
return clib_host_to_net_u32 (ip4);
}
int ipip_add_tunnel (ipip_transport_t transport, u32 instance,
ip46_address_t * src, ip46_address_t * dst,
u32 fib_index, tunnel_encap_decap_flags_t flags,
ip_dscp_t dscp, tunnel_mode_t mode, u32 * sw_if_indexp);
int ipip_del_tunnel (u32 sw_if_index);
int sixrd_add_tunnel (ip6_address_t * ip6_prefix, u8 ip6_prefix_len,
ip4_address_t * ip4_prefix, u8 ip4_prefix_len,
ip4_address_t * ip4_src, bool security_check,
u32 ip4_fib_index, u32 ip6_fib_index,
u32 * sw_if_index);
int sixrd_del_tunnel (u32 sw_if_index);
void ipip_tunnel_db_add (ipip_tunnel_t * t, const ipip_tunnel_key_t * key);
void ipip_tunnel_db_remove (ipip_tunnel_t * t, const ipip_tunnel_key_t * key);
ipip_tunnel_t *ipip_tunnel_db_find (const ipip_tunnel_key_t * key);
ipip_tunnel_t *ipip_tunnel_db_find_by_sw_if_index (u32 sw_if_index);
void ipip_mk_key (const ipip_tunnel_t * t, ipip_tunnel_key_t * key);
void ipip_mk_key_i (ipip_transport_t transport,
ipip_mode_t mode,
const ip46_address_t * src,
const ip46_address_t * dst,
u32 fib_index, ipip_tunnel_key_t * key);
#endif
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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