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/*
* Copyright (c) 2015 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 __IPSEC_SPD_POLICY_H__
#define __IPSEC_SPD_POLICY_H__
#include <vppinfra/bihash_40_8.h>
#include <vppinfra/bihash_16_8.h>
#include <vnet/ipsec/ipsec_spd.h>
/**
* calculated as max number of flows (2^10) divided by KVP_PER_PAGE (4)
*/
#define IPSEC_FP_HASH_LOOKUP_HASH_BUCKETS (1 << 8)
#define IPSEC_POLICY_PROTOCOL_ANY IP_PROTOCOL_RESERVED
/**
* This number is calculated as ceil power of 2 for the number
* sizeof(clib_bihash_kv_16_8_t)=24 * BIHASH_KVP_PER_PAGE=4 * COLLISIONS_NO=8
*
*/
#define IPSEC_FP_IP4_HASH_MEM_PER_BUCKET 1024
/**
* This number is calculated as ceil power of 2 for the number
* sizeof(clib_bihash_kv_40_8_t)=48 * BIHASH_KVP_PER_PAGE=4 * COLLISIONS_NO=8
*
*/
#define IPSEC_FP_IP6_HASH_MEM_PER_BUCKET 2048
#define foreach_ipsec_policy_action \
_ (0, BYPASS, "bypass") \
_ (1, DISCARD, "discard") \
_ (2, RESOLVE, "resolve") \
_ (3, PROTECT, "protect")
typedef enum
{
#define _(v, f, s) IPSEC_POLICY_ACTION_##f = v,
foreach_ipsec_policy_action
#undef _
} ipsec_policy_action_t;
#define IPSEC_POLICY_N_ACTION (IPSEC_POLICY_ACTION_PROTECT + 1)
typedef struct
{
ip46_address_t start, stop;
} ip46_address_range_t;
typedef struct
{
u16 start, stop;
} port_range_t;
/**
* @brief
* Policy packet & bytes counters
*/
extern vlib_combined_counter_main_t ipsec_spd_policy_counters;
/**
* @brief A Secruity Policy. An entry in an SPD
*/
typedef struct ipsec_policy_t_
{
u32 id;
i32 priority;
// the type of policy
ipsec_spd_policy_type_t type;
// Selector
u8 is_ipv6;
ip46_address_range_t laddr;
ip46_address_range_t raddr;
u8 protocol;
port_range_t lport;
port_range_t rport;
// Policy
ipsec_policy_action_t policy;
u32 sa_id;
u32 sa_index;
u32 fp_mask_type_id;
} ipsec_policy_t;
/**
* @brief Add/Delete a SPD
*/
extern int ipsec_add_del_policy (vlib_main_t * vm,
ipsec_policy_t * policy,
int is_add, u32 * stat_index);
extern u8 *format_ipsec_policy (u8 * s, va_list * args);
extern u8 *format_ipsec_policy_action (u8 * s, va_list * args);
extern uword unformat_ipsec_policy_action (unformat_input_t * input,
va_list * args);
extern int ipsec_policy_mk_type (bool is_outbound,
bool is_ipv6,
ipsec_policy_action_t action,
ipsec_spd_policy_type_t * type);
/* A 5-tuple used to calculate the bihash entry */
typedef union
{
struct
{
union
{
struct
{
u32 l3_zero_pad[6];
ip4_address_t laddr;
ip4_address_t raddr;
};
ip6_address_t ip6_laddr;
ip6_address_t ip6_raddr;
};
u16 lport;
u16 rport;
u16 protocol;
u16 is_ipv6;
};
/* for ipv6 */
clib_bihash_kv_40_8_t kv_40_8;
/* for ipv4 */
struct
{
u64 padding_for_kv_16_8[3];
clib_bihash_kv_16_8_t kv_16_8;
};
} ipsec_fp_5tuple_t;
/*
* An element describing a particular policy mask,
* and refcount of policies with same mask.
*/
typedef struct
{
/** Required for pool_get_aligned */
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
ipsec_fp_5tuple_t mask;
u32 refcount; /* counts how many policies use this mask */
} ipsec_fp_mask_type_entry_t;
/*
* Bihash lookup value,
* contains an unordered vector of policies indices in policy pool.
*/
typedef union
{
u64 as_u64;
struct
{
u32 *fp_policies_ids;
};
} ipsec_fp_lookup_value_t;
/**
* @brief add or delete a fast path policy
*/
int ipsec_fp_add_del_policy (void *fp_spd, ipsec_policy_t *policy, int is_add,
u32 *stat_index);
static_always_inline int
ipsec_policy_is_equal (ipsec_policy_t *p1, ipsec_policy_t *p2)
{
if (p1->priority != p2->priority)
return 0;
if (p1->type != p2->type)
return (0);
if (p1->policy != p2->policy)
return (0);
if (p1->sa_id != p2->sa_id)
return (0);
if (p1->protocol != p2->protocol)
return (0);
if (p1->lport.start != p2->lport.start)
return (0);
if (p1->lport.stop != p2->lport.stop)
return (0);
if (p1->rport.start != p2->rport.start)
return (0);
if (p1->rport.stop != p2->rport.stop)
return (0);
if (p1->is_ipv6 != p2->is_ipv6)
return (0);
if (p2->is_ipv6)
{
if (p1->laddr.start.ip6.as_u64[0] != p2->laddr.start.ip6.as_u64[0])
return (0);
if (p1->laddr.start.ip6.as_u64[1] != p2->laddr.start.ip6.as_u64[1])
return (0);
if (p1->laddr.stop.ip6.as_u64[0] != p2->laddr.stop.ip6.as_u64[0])
return (0);
if (p1->laddr.stop.ip6.as_u64[1] != p2->laddr.stop.ip6.as_u64[1])
return (0);
if (p1->raddr.start.ip6.as_u64[0] != p2->raddr.start.ip6.as_u64[0])
return (0);
if (p1->raddr.start.ip6.as_u64[1] != p2->raddr.start.ip6.as_u64[1])
return (0);
if (p1->raddr.stop.ip6.as_u64[0] != p2->raddr.stop.ip6.as_u64[0])
return (0);
if (p1->laddr.stop.ip6.as_u64[1] != p2->laddr.stop.ip6.as_u64[1])
return (0);
}
else
{
if (p1->laddr.start.ip4.as_u32 != p2->laddr.start.ip4.as_u32)
return (0);
if (p1->laddr.stop.ip4.as_u32 != p2->laddr.stop.ip4.as_u32)
return (0);
if (p1->raddr.start.ip4.as_u32 != p2->raddr.start.ip4.as_u32)
return (0);
if (p1->raddr.stop.ip4.as_u32 != p2->raddr.stop.ip4.as_u32)
return (0);
}
return (1);
}
#endif /* __IPSEC_SPD_POLICY_H__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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