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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.
*/
/**
* @file
* @brief NAT port/address allocation lib
*/
#ifndef included_nat_lib_alloc_h__
#define included_nat_lib_alloc_h__
#include <vnet/ip/ip.h>
#define foreach_nat_error \
_(VALUE_EXIST, -1, "Value already exists") \
_(NO_SUCH_ENTRY, -2, "No such entry") \
_(UNKNOWN_PROTOCOL, -3, "Unknown protocol") \
_(OUT_OF_TRANSLATIONS, -4, "Out of translations")
#define foreach_nat_protocol \
_(UDP, 0, udp, "udp") \
_(TCP, 1, tcp, "tcp") \
_(ICMP, 2, icmp, "icmp")
typedef enum
{
#define _(N, i, s) NAT_ERROR_##N = i,
foreach_nat_error
#undef _
} nat_error_t;
typedef enum
{
#define _(N, i, n, s) NAT_PROTOCOL_##N = i,
foreach_nat_protocol
#undef _
} nat_protocol_t;
typedef struct nat_ip4_pool_addr_s nat_ip4_pool_addr_t;
typedef struct nat_ip4_addr_port_s nat_ip4_addr_port_t;
typedef struct nat_ip4_pool_s nat_ip4_pool_t;
typedef void (nat_add_del_ip4_pool_addr_cb_t) (ip4_address_t addr,
u8 is_add, void *opaque);
typedef int (nat_alloc_ip4_addr_and_port_cb_t) (nat_ip4_pool_t * pool,
u32 fib_index,
u32 thread_index,
u32 nat_thread_index,
u16 port_per_thread,
u16 protocol,
nat_ip4_addr_port_t * out);
struct nat_ip4_pool_addr_s
{
ip4_address_t addr;
u32 fib_index;
/* *INDENT-OFF* */
#define _(N, i, n, s) \
u16 busy_##n##_ports; \
u16 * busy_##n##_ports_per_thread; \
uword * busy_##n##_port_bitmap;
foreach_nat_protocol
#undef _
/* *INDENT-ON* */
};
struct nat_ip4_addr_port_s
{
ip4_address_t addr;
u16 port;
};
struct nat_ip4_pool_s
{
nat_add_del_ip4_pool_addr_cb_t *add_del_pool_addr_cb;
nat_alloc_ip4_addr_and_port_cb_t *alloc_addr_and_port_cb;
nat_ip4_pool_addr_t *pool_addr;
u32 random_seed;
};
int
nat_add_del_ip4_pool_addr (nat_ip4_pool_t * pool,
ip4_address_t addr, u8 is_add);
int
nat_add_del_ip4_pool_addrs (nat_ip4_pool_t * pool,
ip4_address_t addr,
u32 count, u8 is_add, void *opaque);
int
nat_alloc_ip4_addr_and_port_cb_default (nat_ip4_pool_t * pool,
u32 fib_index,
u32 thread_index,
u32 nat_thread_index,
u16 port_per_thread,
u16 protocol,
nat_ip4_addr_port_t * out);
int
nat_alloc_ip4_addr_and_port (nat_ip4_pool_t * pool,
u32 fib_index,
u32 thread_index,
u32 nat_thread_index,
u16 port_per_thread,
u16 protocol, nat_ip4_addr_port_t * out);
int
nat_free_ip4_addr_and_port (nat_ip4_pool_t * pool,
u32 thread_index,
u16 protocol, nat_ip4_addr_port_t * in);
#endif /* included_nat_lib_alloc_h__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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