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/*
*------------------------------------------------------------------
* Copyright (c) 2022 Intel 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_FP_LOOKUP_H
#define IPSEC_SPD_FP_LOOKUP_H
#include <vnet/ipsec/ipsec.h>
/**
* @brief function handler to perform lookup in fastpath SPD
* for inbound traffic burst of n packets
**/
inline u32
ipsec_fp_in_policy_match_n (void *spd_fp, u8 is_ipv6,
ipsec_fp_5tuple_t *tuples,
ipsec_policy_t **policies, u32 *policy_ids, u32 n)
{
return 0;
}
static_always_inline int
single_rule_match_5tuple (ipsec_policy_t *policy, ipsec_fp_5tuple_t *match)
{
if (PREDICT_FALSE (policy->is_ipv6 != match->is_ipv6))
return (0);
if (PREDICT_FALSE (policy->protocol != IPSEC_POLICY_PROTOCOL_ANY &&
(policy->protocol != match->protocol)))
return (0);
if (!policy->is_ipv6)
{
if (PREDICT_FALSE (
clib_net_to_host_u32 (match->laddr.as_u32) <
clib_net_to_host_u32 (policy->laddr.start.ip4.as_u32)))
return (0);
if (PREDICT_FALSE (clib_net_to_host_u32 (match->laddr.as_u32) >
clib_net_to_host_u32 (policy->laddr.stop.ip4.as_u32)))
return (0);
if (PREDICT_FALSE (
clib_net_to_host_u32 (match->raddr.as_u32) <
clib_net_to_host_u32 (policy->raddr.start.ip4.as_u32)))
return (0);
if (PREDICT_FALSE (clib_net_to_host_u32 (match->raddr.as_u32) >
clib_net_to_host_u32 (policy->raddr.stop.ip4.as_u32)))
return (0);
}
else
{
if (ip6_address_compare (&match->ip6_laddr, &policy->laddr.start.ip6) <
0)
return (0);
if (ip6_address_compare (&policy->laddr.stop.ip6, &match->ip6_laddr) < 0)
return (0);
if (ip6_address_compare (&match->ip6_raddr, &policy->raddr.start.ip6) <
0)
return (0);
if (ip6_address_compare (&policy->raddr.stop.ip6, &match->ip6_raddr) < 0)
return (0);
}
if (PREDICT_FALSE ((match->protocol != IP_PROTOCOL_TCP) &&
(match->protocol != IP_PROTOCOL_UDP) &&
(match->protocol != IP_PROTOCOL_SCTP)))
{
return (1);
}
if (match->lport < policy->lport.start)
return (0);
if (match->lport > policy->lport.stop)
return (0);
if (match->rport < policy->rport.start)
return (0);
if (match->rport > policy->rport.stop)
return (0);
return (1);
}
static_always_inline u32
ipsec_fp_ip6_out_policy_match_n (void *spd_fp, ipsec_fp_5tuple_t *tuples,
ipsec_policy_t **policies, u32 *ids, u32 n)
{
u32 last_priority[n];
u32 i = 0;
u32 counter = 0;
ipsec_fp_mask_type_entry_t *mte;
u32 *mti;
ipsec_fp_5tuple_t *match = tuples;
ipsec_policy_t *policy;
u32 n_left = n;
clib_bihash_kv_40_8_t kv;
/* result of the lookup */
clib_bihash_kv_40_8_t result;
ipsec_fp_lookup_value_t *result_val =
(ipsec_fp_lookup_value_t *) &result.value;
u64 *pkey, *pmatch, *pmask;
ipsec_main_t *im = &ipsec_main;
ipsec_spd_fp_t *pspd_fp = (ipsec_spd_fp_t *) spd_fp;
u32 *mask_type_ids = pspd_fp->fp_mask_types[IPSEC_SPD_POLICY_IP4_OUTBOUND];
/*clear the list of matched policies pointers */
clib_memset (policies, 0, n * sizeof (*policies));
clib_memset (last_priority, 0, n * sizeof (u32));
n_left = n;
while (n_left)
{
vec_foreach (mti, mask_type_ids)
{
mte = im->fp_mask_types + *mti;
pmatch = (u64 *) match;
pmask = (u64 *) &mte->mask;
pkey = (u64 *) kv.key;
*pkey++ = *pmatch++ & *pmask++;
*pkey++ = *pmatch++ & *pmask++;
*pkey++ = *pmatch++ & *pmask++;
*pkey++ = *pmatch++ & *pmask++;
*pkey++ = *pmatch++ & *pmask++;
*pkey++ = *pmatch++ & *pmask++;
int res = clib_bihash_search_inline_2_40_8 (
&pspd_fp->fp_ip6_lookup_hash, &kv, &result);
/* lookup the hash by each packet in the burst for this mask. */
if (res == 0)
{
/* There is a hit in the hash table. */
/* Find the policy with highest priority. */
/* Store the lookup results in a dedicated array. */
if (vec_len (result_val->fp_policies_ids) > 1)
{
u32 *policy_id;
vec_foreach (policy_id, result_val->fp_policies_ids)
{
policy = im->policies + *policy_id;
if (single_rule_match_5tuple (policy, match))
{
if (last_priority[i] < policy->priority)
{
last_priority[i] = policy->priority;
if (policies[i] == 0)
counter++;
policies[i] = policy;
ids[i] = *policy_id;
}
}
}
}
else
{
u32 *policy_id;
ASSERT (vec_len (result_val->fp_policies_ids) == 1);
policy_id = result_val->fp_policies_ids;
policy = im->policies + *policy_id;
if (single_rule_match_5tuple (policy, match))
{
if (last_priority[i] < policy->priority)
{
last_priority[i] = policy->priority;
if (policies[i] == 0)
counter++;
policies[i] = policy;
ids[i] = *policy_id;
}
}
}
}
}
n_left--;
match++;
i++;
}
return counter;
}
static_always_inline u32
ipsec_fp_ip4_out_policy_match_n (void *spd_fp, ipsec_fp_5tuple_t *tuples,
ipsec_policy_t **policies, u32 *ids, u32 n)
{
u32 last_priority[n];
u32 i = 0;
u32 counter = 0;
ipsec_fp_mask_type_entry_t *mte;
u32 *mti;
ipsec_fp_5tuple_t *match = tuples;
ipsec_policy_t *policy;
u32 n_left = n;
clib_bihash_kv_16_8_t kv;
/* result of the lookup */
clib_bihash_kv_16_8_t result;
ipsec_fp_lookup_value_t *result_val =
(ipsec_fp_lookup_value_t *) &result.value;
u64 *pkey, *pmatch, *pmask;
ipsec_main_t *im = &ipsec_main;
ipsec_spd_fp_t *pspd_fp = (ipsec_spd_fp_t *) spd_fp;
u32 *mask_type_ids = pspd_fp->fp_mask_types[IPSEC_SPD_POLICY_IP4_OUTBOUND];
/* clear the list of matched policies pointers */
clib_memset (policies, 0, n * sizeof (*policies));
clib_memset (last_priority, 0, n * sizeof (u32));
n_left = n;
while (n_left)
{
vec_foreach (mti, mask_type_ids)
{
mte = im->fp_mask_types + *mti;
pmatch = (u64 *) &match->laddr;
pmask = (u64 *) &mte->mask.laddr;
pkey = (u64 *) kv.key;
*pkey++ = *pmatch++ & *pmask++;
*pkey++ = *pmatch++ & *pmask++;
int res = clib_bihash_search_inline_2_16_8 (
&pspd_fp->fp_ip4_lookup_hash, &kv, &result);
/* lookup the hash by each packet in the burst for this mask. */
if (res == 0)
{
/* There is a hit in the hash table. */
/* Find the policy with highest priority. */
/* Store the lookup results in a dedicated array. */
if (vec_len (result_val->fp_policies_ids) > 1)
{
u32 *policy_id;
vec_foreach (policy_id, result_val->fp_policies_ids)
{
policy = im->policies + *policy_id;
if ((last_priority[i] < policy->priority) &&
(single_rule_match_5tuple (policy, match)))
{
last_priority[i] = policy->priority;
if (policies[i] == 0)
counter++;
policies[i] = policy;
ids[i] = *policy_id;
}
}
}
else
{
u32 *policy_id;
ASSERT (vec_len (result_val->fp_policies_ids) == 1);
policy_id = result_val->fp_policies_ids;
policy = im->policies + *policy_id;
if ((last_priority[i] < policy->priority) &&
(single_rule_match_5tuple (policy, match)))
{
last_priority[i] = policy->priority;
if (policies[i] == 0)
counter++;
policies[i] = policy;
ids[i] = *policy_id;
}
}
}
}
i++;
n_left--;
match++;
}
return counter;
}
/**
* @brief function handler to perform lookup in fastpath SPD
* for outbound traffic burst of n packets
* returns number of successfully matched policies
**/
static_always_inline u32
ipsec_fp_out_policy_match_n (void *spd_fp, u8 is_ipv6,
ipsec_fp_5tuple_t *tuples,
ipsec_policy_t **policies, u32 *ids, u32 n)
{
if (is_ipv6)
return ipsec_fp_ip6_out_policy_match_n (spd_fp, tuples, policies, ids, n);
else
return ipsec_fp_ip4_out_policy_match_n (spd_fp, tuples, policies, ids, n);
}
#endif /* !IPSEC_SPD_FP_LOOKUP_H */
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