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authorMatus Fabian <matfabia@cisco.com>2017-12-18 05:38:24 -0800
committerOle Trøan <otroan@employees.org>2017-12-19 10:34:07 +0000
commitb932d26ea48ba8aa7677dc3b6ffd5d4729176c8f (patch)
treed4349f5f528814032502dac7fde65d16a44834cc /src/plugins/nat/nat.h
parentf13f6a4dc9b68d6972ffbfb1dd94912d66887358 (diff)
NAT: Twice NAT44 (VPP-969)
Translation of both source and destination addresses and ports for 1:1 NAT session initiated from outside network (ExternalIP K8 use case). Change-Id: Ic0000497cf71619aac996d6d580844f0ea0edc14 Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'src/plugins/nat/nat.h')
-rw-r--r--src/plugins/nat/nat.h61
1 files changed, 51 insertions, 10 deletions
diff --git a/src/plugins/nat/nat.h b/src/plugins/nat/nat.h
index e82c23026cb..5a2d0855e9b 100644
--- a/src/plugins/nat/nat.h
+++ b/src/plugins/nat/nat.h
@@ -61,10 +61,10 @@ typedef struct {
{
ip4_address_t l_addr;
ip4_address_t r_addr;
- u32 fib_index;
+ u32 proto:8,
+ fib_index:24;
u16 l_port;
- u8 proto;
- u8 rsvd;
+ u16 r_port;
};
u64 as_u64[2];
};
@@ -128,6 +128,7 @@ typedef enum {
#define SNAT_SESSION_FLAG_STATIC_MAPPING 1
#define SNAT_SESSION_FLAG_UNKNOWN_PROTO 2
#define SNAT_SESSION_FLAG_LOAD_BALANCING 4
+#define SNAT_SESSION_FLAG_TWICE_NAT 8
#define NAT_INTERFACE_FLAG_IS_INSIDE 1
#define NAT_INTERFACE_FLAG_IS_OUTSIDE 2
@@ -157,6 +158,10 @@ typedef CLIB_PACKED(struct {
/* External host address and port */
ip4_address_t ext_host_addr; /* 68-71 */
u16 ext_host_port; /* 72-73 */
+
+ /* External hos address and port after translation */
+ ip4_address_t ext_host_nat_addr; /* 74-77 */
+ u16 ext_host_nat_port; /* 78-79 */
}) snat_session_t;
@@ -211,6 +216,7 @@ typedef struct {
u16 local_port;
u16 external_port;
u8 addr_only;
+ u8 twice_nat;
u32 vrf_id;
u32 fib_index;
snat_protocol_t proto;
@@ -231,6 +237,7 @@ typedef struct {
u32 vrf_id;
snat_protocol_t proto;
int addr_only;
+ int twice_nat;
int is_add;
} snat_static_map_resolve_t;
@@ -317,8 +324,12 @@ typedef struct snat_main_s {
u8 psid_length;
u16 psid;
+ /* Vector of twice NAT addresses for extenal hosts */
+ snat_address_t * twice_nat_addresses;
+
/* sw_if_indices whose intfc addresses should be auto-added */
u32 * auto_add_sw_if_indices;
+ u32 * auto_add_sw_if_indices_twice_nat;
/* vector of interface address static mappings to resolve. */
snat_static_map_resolve_t *to_resolve;
@@ -402,7 +413,8 @@ int snat_static_mapping_match (snat_main_t * sm,
snat_session_key_t match,
snat_session_key_t * mapping,
u8 by_external,
- u8 *is_addr_only);
+ u8 *is_addr_only,
+ u8 *twice_nat);
void snat_add_del_addr_to_fib (ip4_address_t * addr,
u8 p_len,
@@ -426,7 +438,25 @@ typedef struct {
@param s SNAT session
@return 1 if SNAT session for unknown protocol otherwise 0
*/
-#define snat_is_unk_proto_session(s) s->flags & SNAT_SESSION_FLAG_UNKNOWN_PROTO
+#define snat_is_unk_proto_session(s) (s->flags & SNAT_SESSION_FLAG_UNKNOWN_PROTO)
+
+/** \brief Check if NAT session is twice NAT.
+ @param s NAT session
+ @return 1 if NAT session is twice NAT
+*/
+#define is_twice_nat_session(s) (s->flags & SNAT_SESSION_FLAG_TWICE_NAT)
+
+/** \brief Check if NAT session is load-balancing.
+ @param s NAT session
+ @return 1 if NAT session is load-balancing
+*/
+#define is_lb_session(s) (s->flags & SNAT_SESSION_FLAG_LOAD_BALANCING)
+
+/** \brief Check if NAT session is endpoint dependent.
+ @param s NAT session
+ @return 1 if NAT session is endpoint dependent
+*/
+#define is_ed_session(s) (snat_is_unk_proto_session (s) || is_twice_nat_session (s) || is_lb_session (s))
#define nat_interface_is_inside(i) i->flags & NAT_INTERFACE_FLAG_IS_INSIDE
#define nat_interface_is_outside(i) i->flags & NAT_INTERFACE_FLAG_IS_OUTSIDE
@@ -502,24 +532,35 @@ u32 icmp_match_out2in_det(snat_main_t *sm, vlib_node_runtime_t *node,
snat_session_key_t *p_value,
u8 *p_dont_translate, void *d, void *e);
void increment_v4_address(ip4_address_t * a);
-void snat_add_address(snat_main_t *sm, ip4_address_t *addr, u32 vrf_id);
-int snat_del_address(snat_main_t *sm, ip4_address_t addr, u8 delete_sm);
+void snat_add_address(snat_main_t *sm, ip4_address_t *addr, u32 vrf_id,
+ u8 twice_nat);
+int snat_del_address(snat_main_t *sm, ip4_address_t addr, u8 delete_sm,
+ u8 twice_nat);
int snat_add_static_mapping(ip4_address_t l_addr, ip4_address_t e_addr,
u16 l_port, u16 e_port, u32 vrf_id, int addr_only,
- u32 sw_if_index, snat_protocol_t proto, int is_add);
+ u32 sw_if_index, snat_protocol_t proto, int is_add,
+ u8 twice_nat);
clib_error_t * snat_api_init(vlib_main_t * vm, snat_main_t * sm);
int snat_set_workers (uword * bitmap);
int snat_interface_add_del(u32 sw_if_index, u8 is_inside, int is_del);
int snat_interface_add_del_output_feature(u32 sw_if_index, u8 is_inside,
int is_del);
-int snat_add_interface_address(snat_main_t *sm, u32 sw_if_index, int is_del);
+int snat_add_interface_address(snat_main_t *sm, u32 sw_if_index, int is_del,
+ u8 twice_nat);
uword unformat_snat_protocol(unformat_input_t * input, va_list * args);
u8 * format_snat_protocol(u8 * s, va_list * args);
int nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port,
snat_protocol_t proto, u32 vrf_id,
- nat44_lb_addr_port_t *locals, u8 is_add);
+ nat44_lb_addr_port_t *locals, u8 is_add,
+ u8 twice_nat);
int nat44_del_session (snat_main_t *sm, ip4_address_t *addr, u16 port,
snat_protocol_t proto, u32 vrf_id, int is_in);
+void nat_free_session_data (snat_main_t * sm, snat_session_t * s,
+ u32 thread_index);
+snat_user_t * nat_user_get_or_create (snat_main_t *sm, ip4_address_t *addr,
+ u32 fib_index, u32 thread_index);
+snat_session_t * nat_session_alloc_or_recycle (snat_main_t *sm, snat_user_t *u,
+ u32 thread_index);
static_always_inline u8
icmp_is_error_message (icmp46_header_t * icmp)