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/*
* Copyright (c) 2017 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_dslite_h__
#define __included_dslite_h__
#include <vppinfra/dlist.h>
#include <vppinfra/bihash_8_8.h>
#include <vppinfra/bihash_16_8.h>
#include <vppinfra/bihash_24_8.h>
#include <nat/lib/lib.h>
#include <nat/lib/alloc.h>
#include <nat/lib/inlines.h>
typedef struct
{
u16 identifier;
u16 sequence;
} echo_header_t;
/* session key (4-tuple) */
typedef struct
{
union
{
struct
{
ip4_address_t addr;
u16 port;
u16 protocol:3, fib_index:13;
};
u64 as_u64;
};
} nat_session_key_t;
typedef struct
{
union
{
struct
{
ip6_address_t softwire_id;
ip4_address_t addr;
u16 port;
u8 proto;
u8 pad;
};
u64 as_u64[3];
};
} dslite_session_key_t;
/* *INDENT-OFF* */
typedef CLIB_PACKED (struct
{
nat_session_key_t out2in;
dslite_session_key_t in2out;
u32 per_b4_index;
u32 per_b4_list_head_index;
f64 last_heard;
u64 total_bytes;
u32 total_pkts;
}) dslite_session_t;
/* *INDENT-ON* */
typedef struct
{
ip6_address_t addr;
u32 sessions_per_b4_list_head_index;
u32 nsessions;
} dslite_b4_t;
typedef struct
{
/* Main lookup tables */
clib_bihash_8_8_t out2in;
clib_bihash_24_8_t in2out;
/* Find a B4 */
clib_bihash_16_8_t b4_hash;
/* B4 pool */
dslite_b4_t *b4s;
/* Session pool */
dslite_session_t *sessions;
/* Pool of doubly-linked list elements */
dlist_elt_t *list_pool;
} dslite_per_thread_data_t;
typedef struct
{
ip6_address_t aftr_ip6_addr;
ip4_address_t aftr_ip4_addr;
ip6_address_t b4_ip6_addr;
ip4_address_t b4_ip4_addr;
dslite_per_thread_data_t *per_thread_data;
u32 num_workers;
u32 first_worker_index;
u16 port_per_thread;
/* nat address pool */
nat_ip4_pool_t pool;
/* counters/gauges */
vlib_simple_counter_main_t total_b4s;
vlib_simple_counter_main_t total_sessions;
/* node index */
u32 dslite_in2out_node_index;
u32 dslite_in2out_slowpath_node_index;
u32 dslite_out2in_node_index;
/* If set then the DSLite component behaves as CPE/B4
* otherwise it behaves as AFTR */
u8 is_ce;
u8 is_enabled;
u16 msg_id_base;
} dslite_main_t;
typedef struct
{
u32 next_index;
u32 session_index;
} dslite_trace_t;
typedef struct
{
u32 next_index;
} dslite_ce_trace_t;
#define foreach_dslite_error \
_(IN2OUT, "valid in2out DS-Lite packets") \
_(OUT2IN, "valid out2in DS-Lite packets") \
_(CE_ENCAP, "valid CE encap DS-Lite packets") \
_(CE_DECAP, "valid CE decap DS-Lite packets") \
_(NO_TRANSLATION, "no translation") \
_(BAD_IP6_PROTOCOL, "bad ip6 protocol") \
_(OUT_OF_PORTS, "out of ports") \
_(UNSUPPORTED_PROTOCOL, "unsupported protocol") \
_(BAD_ICMP_TYPE, "unsupported icmp type") \
_(UNKNOWN, "unknown")
typedef enum
{
#define _(sym,str) DSLITE_ERROR_##sym,
foreach_dslite_error
#undef _
DSLITE_N_ERROR,
} dslite_error_t;
extern dslite_main_t dslite_main;
extern vlib_node_registration_t dslite_in2out_node;
extern vlib_node_registration_t dslite_in2out_slowpath_node;
extern vlib_node_registration_t dslite_out2in_node;
extern vlib_node_registration_t dslite_ce_encap_node;
extern vlib_node_registration_t dslite_ce_decap_node;
void dslite_set_ce (dslite_main_t * dm, u8 set);
int dslite_set_aftr_ip6_addr (dslite_main_t * dm, ip6_address_t * addr);
int dslite_set_b4_ip6_addr (dslite_main_t * dm, ip6_address_t * addr);
int dslite_set_aftr_ip4_addr (dslite_main_t * dm, ip4_address_t * addr);
int dslite_set_b4_ip4_addr (dslite_main_t * dm, ip4_address_t * addr);
int dslite_add_del_pool_addr (dslite_main_t * dm, ip4_address_t * addr,
u8 is_add);
u8 *format_dslite_trace (u8 * s, va_list * args);
u8 *format_dslite_ce_trace (u8 * s, va_list * args);
#endif /* __included_dslite_h__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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