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authorMatus Fabian <matfabia@cisco.com>2017-02-10 03:48:01 -0800
committerOle Trøan <otroan@employees.org>2017-03-07 12:47:12 +0000
commit066f034b903bda6e938bec1b12f01edef65ee9c4 (patch)
treeddb4a1eb0878fe7ac58f25056f3bb7c6ad0bae3a /src/plugins/snat/snat.h
parenteab38d91e8db5ad271598a63781a7afa3bd8b5ea (diff)
CGN: Deterministic NAT (VPP-623)
Inside user is statically mapped to a set of outside ports. Support endpoint dependent mapping to deal with overloading of the outside ports. Change-Id: I8014438744597a976f8ae459283e8b91f63b7f72 Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'src/plugins/snat/snat.h')
-rw-r--r--src/plugins/snat/snat.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/src/plugins/snat/snat.h b/src/plugins/snat/snat.h
index 1d203aa870a..9cfd6be222e 100644
--- a/src/plugins/snat/snat.h
+++ b/src/plugins/snat/snat.h
@@ -28,6 +28,11 @@
#include <vppinfra/error.h>
#include <vlibapi/api.h>
+
+#define SNAT_UDP_TIMEOUT 300
+#define SNAT_TCP_TRANSITORY_TIMEOUT 240
+#define SNAT_TCP_ESTABLISHED_TIMEOUT 7440
+
/* Key */
typedef struct {
union
@@ -48,6 +53,19 @@ typedef struct {
{
struct
{
+ ip4_address_t ext_host_addr;
+ u16 ext_host_port;
+ u16 out_port;
+ };
+ u64 as_u64;
+ };
+} snat_det_out_key_t;
+
+typedef struct {
+ union
+ {
+ struct
+ {
ip4_address_t addr;
u32 fib_index;
};
@@ -81,6 +99,22 @@ typedef enum {
} snat_protocol_t;
+#define foreach_snat_session_state \
+ _(0, UNKNOWN, "unknown") \
+ _(1, UDP_ACTIVE, "udp-active") \
+ _(2, TCP_SYN_SENT, "tcp-syn-sent") \
+ _(3, TCP_ESTABLISHED, "tcp-established") \
+ _(4, TCP_FIN_WAIT, "tcp-fin-wait") \
+ _(5, TCP_CLOSE_WAIT, "tcp-close-wait") \
+ _(6, TCP_LAST_ACK, "tcp-last-ack")
+
+typedef enum {
+#define _(v, N, s) SNAT_SESSION_##N = v,
+ foreach_snat_session_state
+#undef _
+} snat_session_state_t;
+
+
#define SNAT_SESSION_FLAG_STATIC_MAPPING 1
typedef CLIB_PACKED(struct {
@@ -127,6 +161,25 @@ typedef struct {
} snat_address_t;
typedef struct {
+ u16 in_port;
+ snat_det_out_key_t out;
+ u8 state;
+ u32 expire;
+} snat_det_session_t;
+
+typedef struct {
+ ip4_address_t in_addr;
+ u8 in_plen;
+ ip4_address_t out_addr;
+ u8 out_plen;
+ u32 sharing_ratio;
+ u16 ports_per_host;
+ u32 ses_num;
+ /* vector of sessions */
+ snat_det_session_t * sessions;
+} snat_det_map_t;
+
+typedef struct {
ip4_address_t local_addr;
ip4_address_t external_addr;
u16 local_port;
@@ -164,6 +217,8 @@ typedef struct {
dlist_elt_t * list_pool;
} snat_main_per_thread_data_t;
+typedef u32 (snat_get_worker_function_t) (ip4_header_t * ip, u32 rx_fib_index);
+
typedef struct {
/* Main lookup tables */
clib_bihash_8_8_t out2in;
@@ -182,6 +237,8 @@ typedef struct {
u32 first_worker_index;
u32 next_worker;
u32 * workers;
+ snat_get_worker_function_t * worker_in2out_cb;
+ snat_get_worker_function_t * worker_out2in_cb;
/* Per thread data */
snat_main_per_thread_data_t * per_thread_data;
@@ -214,9 +271,17 @@ typedef struct {
u32 fq_in2out_index;
u32 fq_out2in_index;
+ /* in2out and out2in node index */
+ u32 in2out_node_index;
+ u32 out2in_node_index;
+
+ /* Deterministic NAT */
+ snat_det_map_t * det_maps;
+
/* Config parameters */
u8 static_mapping_only;
u8 static_mapping_connection_tracking;
+ u8 deterministic;
u32 translation_buckets;
u32 translation_memory_size;
u32 user_buckets;
@@ -248,6 +313,8 @@ extern vlib_node_registration_t snat_in2out_fast_node;
extern vlib_node_registration_t snat_out2in_fast_node;
extern vlib_node_registration_t snat_in2out_worker_handoff_node;
extern vlib_node_registration_t snat_out2in_worker_handoff_node;
+extern vlib_node_registration_t snat_det_in2out_node;
+extern vlib_node_registration_t snat_det_out2in_node;
void snat_free_outside_address_and_port (snat_main_t * sm,
snat_session_key_t * k,
@@ -263,6 +330,11 @@ int snat_static_mapping_match (snat_main_t * sm,
snat_session_key_t * mapping,
u8 by_external);
+void snat_add_del_addr_to_fib (ip4_address_t * addr,
+ u8 p_len,
+ u32 sw_if_index,
+ int is_add);
+
format_function_t format_snat_user;
typedef struct {