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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 included_ip_ip_source_and_port_range_check_h
#define included_ip_ip_source_and_port_range_check_h
typedef struct
{
/* convenience */
vlib_main_t *vlib_main;
vnet_main_t *vnet_main;
} source_range_check_main_t;
extern source_range_check_main_t source_range_check_main;
typedef enum
{
IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_TCP_OUT,
IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_UDP_OUT,
IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_TCP_IN,
IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_UDP_IN,
IP_SOURCE_AND_PORT_RANGE_CHECK_N_PROTOCOLS,
} ip_source_and_port_range_check_protocol_t;
typedef struct
{
u32 fib_index[IP_SOURCE_AND_PORT_RANGE_CHECK_N_PROTOCOLS];
} ip_source_and_port_range_check_config_t;
#define IP_SOURCE_AND_PORT_RANGE_CHECK_RANGE_LIMIT VLIB_BUFFER_PRE_DATA_SIZE/(2*sizeof(u16x8));
typedef struct
{
union
{
u16x8 as_u16x8;
u16 as_u16[8];
};
} u16x8vec_t;
typedef struct
{
u16x8vec_t low;
u16x8vec_t hi;
} protocol_port_range_t;
/**
* @brief The number of supported ranges per-data path object.
* If more ranges are required, bump this number.
*/
#define N_PORT_RANGES_PER_DPO 64
#define N_RANGES_PER_BLOCK (sizeof(u16x8vec_t)/2)
#define N_BLOCKS_PER_DPO (N_PORT_RANGES_PER_DPO/N_RANGES_PER_BLOCK)
/**
* @brief
* The object that is in the data-path to perform the check.
*
* Some trade-offs here; memory vs performance.
*
* performance:
* the principle factor is d-cache line misses/hits.
* so we want the data layout to minimise the d-cache misses. This
* means not following dependent reads. i.e. not doing
*
* struct B {
* u16 n_ranges;
* range_t *ragnes; // vector of ranges.
* }
*
* so to read ranges[0] we would first d-cache miss on the address
* of the object of type B, for which we would need to wait before we
* can get the address of B->ranges.
* So this layout is better:
*
* struct B {
* u16 n_ranges;
* range_t ragnes[N];
* }
*
* memory:
* the latter layout above is more memory hungry. And N needs to be:
* 1 - sized for the maximum required
* 2 - fixed, so that objects of type B can be pool allocated and so
* 'get'-able using an index.
* An option over fixed might be to allocate contiguous chunk from
* the pool (like we used to do for multi-path adjs).
*/
typedef struct protocol_port_range_dpo_t_
{
/**
* The number of blocks from the 'block' array below
* that have rnages configured. We keep this count so that in the data-path
* we can limit the loop to be only over the blocks we need
*/
u16 n_used_blocks;
/**
* The total number of free ranges from all blocks.
* Used to prevent overrun of the ranges available.
*/
u16 n_free_ranges;
/**
* the fixed size array of ranges
*/
protocol_port_range_t blocks[N_BLOCKS_PER_DPO];
} protocol_port_range_dpo_t;
int ip4_source_and_port_range_check_add_del (ip4_address_t * address,
u32 length,
u32 vrf_id,
u16 * low_ports,
u16 * hi_ports, int is_add);
// This will be moved to another file in another patch -- for API freeze
int ip6_source_and_port_range_check_add_del (ip6_address_t * address,
u32 length,
u32 vrf_id,
u16 * low_ports,
u16 * hi_ports, int is_add);
int set_ip_source_and_port_range_check (vlib_main_t * vm,
u32 * fib_index,
u32 sw_if_index, u32 is_add);
#endif /* included ip_source_and_port_range_check_h */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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