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authorFilip Varga <fivarga@cisco.com>2020-08-30 21:19:55 +0200
committerOle Trøan <otroan@employees.org>2020-09-02 16:42:41 +0000
commit6484f4b9cbaf19062444cfe09b39ce1514dd146f (patch)
treead70ca1ed7815b0899ba24e962de02a0501908f1 /src/plugins/nat/nat.h
parent42845dd56e0694a88a6318f5974724adee8312fe (diff)
nat: twice-nat static mapping pool address
Let twice-nat static mapping pick specific address from the twice-nat pool. Type: improvement Change-Id: Iadaa036af2fa3b0e6e9a68ff6e68b4bbe1650eb1 Signed-off-by: Filip Varga <fivarga@cisco.com>
Diffstat (limited to 'src/plugins/nat/nat.h')
-rw-r--r--src/plugins/nat/nat.h56
1 files changed, 40 insertions, 16 deletions
diff --git a/src/plugins/nat/nat.h b/src/plugins/nat/nat.h
index 518f2002056..ab699221e69 100644
--- a/src/plugins/nat/nat.h
+++ b/src/plugins/nat/nat.h
@@ -187,16 +187,18 @@ typedef enum
#define SNAT_SESSION_FLAG_FWD_BYPASS 32
#define SNAT_SESSION_FLAG_AFFINITY 64
#define SNAT_SESSION_FLAG_OUTPUT_FEATURE 128
+#define SNAT_SESSION_FLAG_EXACT_ADDRESS 256
/* NAT interface flags */
#define NAT_INTERFACE_FLAG_IS_INSIDE 1
#define NAT_INTERFACE_FLAG_IS_OUTSIDE 2
/* Static mapping flags */
-#define NAT_STATIC_MAPPING_FLAG_ADDR_ONLY 1
-#define NAT_STATIC_MAPPING_FLAG_OUT2IN_ONLY 2
-#define NAT_STATIC_MAPPING_FLAG_IDENTITY_NAT 4
-#define NAT_STATIC_MAPPING_FLAG_LB 8
+#define NAT_STATIC_MAPPING_FLAG_ADDR_ONLY 1
+#define NAT_STATIC_MAPPING_FLAG_OUT2IN_ONLY 2
+#define NAT_STATIC_MAPPING_FLAG_IDENTITY_NAT 4
+#define NAT_STATIC_MAPPING_FLAG_LB 8
+#define NAT_STATIC_MAPPING_FLAG_EXACT_ADDRESS 16
/* *INDENT-OFF* */
typedef CLIB_PACKED(struct
@@ -350,6 +352,8 @@ typedef enum
typedef struct
{
+ /* prefered pool address */
+ ip4_address_t pool_addr;
/* local IP address */
ip4_address_t local_addr;
/* external IP address */
@@ -388,6 +392,7 @@ typedef struct
typedef struct
{
ip4_address_t l_addr;
+ ip4_address_t pool_addr;
u16 l_port;
u16 e_port;
u32 sw_if_index;
@@ -399,6 +404,7 @@ typedef struct
int is_add;
int out2in_only;
int identity_nat;
+ int exact;
u8 *tag;
} snat_static_map_resolve_t;
@@ -776,6 +782,12 @@ unformat_function_t unformat_nat_protocol;
*/
#define is_affinity_sessions(s) (s->flags & SNAT_SESSION_FLAG_AFFINITY)
+/** \brief Check if exact pool address should be used.
+ @param s SNAT session
+ @return 1 if exact pool address or 0
+*/
+#define is_exact_address_session(s) (s->flags & SNAT_SESSION_FLAG_EXACT_ADDRESS)
+
/** \brief Check if NAT interface is inside.
@param i NAT interface
@return 1 if inside interface
@@ -818,6 +830,12 @@ unformat_function_t unformat_nat_protocol;
*/
#define is_lb_static_mapping(sm) (sm->flags & NAT_STATIC_MAPPING_FLAG_LB)
+/** \brief Check if exact pool address should be used.
+ @param s SNAT session
+ @return 1 if exact pool address or 0
+*/
+#define is_exact_address(s) (s->flags & NAT_STATIC_MAPPING_FLAG_EXACT_ADDRESS)
+
/** \brief Check if client initiating TCP connection (received SYN from client)
@param t TCP header
@return 1 if client initiating TCP connection
@@ -1138,6 +1156,8 @@ void nat44_add_del_address_dpo (ip4_address_t addr, u8 is_add);
* @param out2in_only if 1 rule match only out2in direction
* @param tag opaque string tag
* @param identity_nat identity NAT
+ * @param pool_addr pool IPv4 address
+ * @param exact 1 = exact pool address
*
* @return 0 on success, non-zero value otherwise
*/
@@ -1146,7 +1166,8 @@ int snat_add_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr,
int addr_only, u32 sw_if_index,
nat_protocol_t proto, int is_add,
twice_nat_type_t twice_nat, u8 out2in_only,
- u8 * tag, u8 identity_nat);
+ u8 * tag, u8 identity_nat,
+ ip4_address_t pool_addr, int exact);
/**
* @brief Add/delete static mapping with load-balancing (multiple backends)
@@ -1394,16 +1415,18 @@ void expire_per_vrf_sessions (u32 fib_index);
/**
* @brief Match NAT44 static mapping.
*
- * @param key address and port to match
- * @param addr external/local address of the matched mapping
- * @param port port of the matched mapping
- * @param fib_index fib index of the matched mapping
- * @param by_external if 0 match by local address otherwise match by external
- * address
- * @param is_addr_only 1 if matched mapping is address only
- * @param twice_nat matched mapping is twice NAT type
- * @param lb 1 if matched mapping is load-balanced
- * @param ext_host_addr external host address
+ * @param key address and port to match
+ * @param addr external/local address of the matched mapping
+ * @param port port of the matched mapping
+ * @param fib_index fib index of the matched mapping
+ * @param by_external if 0 match by local address otherwise match by external
+ * address
+ * @param is_addr_only 1 if matched mapping is address only
+ * @param twice_nat matched mapping is twice NAT type
+ * @param lb 1 if matched mapping is load-balanced
+ * @param ext_host_addr external host address
+ * @param is_identity_nat 1 if indentity mapping
+ * @param out if !=0 set to pointer of the mapping structure
*
* @returns 0 if match found otherwise 1.
*/
@@ -1420,7 +1443,8 @@ int snat_static_mapping_match (snat_main_t * sm,
twice_nat_type_t * twice_nat,
lb_nat_type_t * lb,
ip4_address_t * ext_host_addr,
- u8 * is_identity_nat);
+ u8 * is_identity_nat,
+ snat_static_mapping_t ** out);
/**
* @brief Add/del NAT address to FIB.