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/*
* Copyright (c) 2020 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 __CNAT_SRC_POLICY_H__
#define __CNAT_SRC_POLICY_H__
// #include <vnet/udp/udp.h>
#include <cnat/cnat_types.h>
#include <cnat/cnat_session.h>
#include <cnat/cnat_translation.h>
typedef enum
{
CNAT_SPORT_PROTO_TCP,
CNAT_SPORT_PROTO_UDP,
CNAT_SPORT_PROTO_ICMP,
CNAT_SPORT_PROTO_ICMP6,
CNAT_N_SPORT_PROTO
} cnat_sport_proto_t;
typedef enum cnat_source_policy_errors_
{
CNAT_SOURCE_ERROR_EXHAUSTED_PORTS,
CNAT_SOURCE_ERROR_USE_DEFAULT,
CNAT_SOURCE_N_ERRORS,
} cnat_source_policy_errors_t;
typedef struct cnat_src_port_allocator_
{
/* Source ports bitmap for snat */
clib_bitmap_t *bmap;
/* Lock for src_ports access */
clib_spinlock_t lock;
} cnat_src_port_allocator_t;
/* function to use to compute source (IP, port) for a new session to a vip */
typedef cnat_source_policy_errors_t (*cnat_vip_source_policy_t)
(vlib_main_t * vm, vlib_buffer_t * b, cnat_session_t * session,
u32 * rsession_flags, const cnat_translation_t * ct,
cnat_node_ctx_t * ctx);
typedef struct cnat_src_policy_main_
{
cnat_vip_source_policy_t vip_policy;
cnat_vip_source_policy_t default_policy;
/* Per proto source ports allocator for snat */
cnat_src_port_allocator_t *src_ports;
} cnat_src_policy_main_t;
extern cnat_src_policy_main_t cnat_src_policy_main;
void cnat_register_vip_src_policy (cnat_vip_source_policy_t fp);
int cnat_allocate_port (u16 * port, ip_protocol_t iproto);
void cnat_free_port (u16 port, ip_protocol_t iproto);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
#endif
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