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authorMatus Fabian <matfabia@cisco.com>2017-06-15 02:28:50 -0700
committerOle Trøan <otroan@employees.org>2017-06-19 11:08:47 +0000
commit029f3d2c1c6b04a6cfef17242cb36b304025fe23 (patch)
tree5036e25543b5d43deeb15fde31135a3531d864ce /src/plugins/snat/nat64.c
parentacd4c63e3c6e70ea3f58527d9bace7c0e38df719 (diff)
NAT64: Hairpinning (VPP-699)
Change-Id: I83a6c277fa211ac2c2ca2d603650c992886af0a7 Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'src/plugins/snat/nat64.c')
-rw-r--r--src/plugins/snat/nat64.c73
1 files changed, 56 insertions, 17 deletions
diff --git a/src/plugins/snat/nat64.c b/src/plugins/snat/nat64.c
index ef745473793..1e8b75967d8 100644
--- a/src/plugins/snat/nat64.c
+++ b/src/plugins/snat/nat64.c
@@ -95,7 +95,10 @@ nat64_add_del_pool_addr (ip4_address_t * addr, u32 vrf_id, u8 is_add)
vec_add2 (nm->addr_pool, a, 1);
a->addr = *addr;
- a->fib_index = ip4_fib_index_from_table_id (vrf_id);
+ a->fib_index = 0;
+ if (vrf_id != ~0)
+ a->fib_index =
+ fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, vrf_id);
#define _(N, i, n, s) \
clib_bitmap_alloc (a->busy_##n##_port_bitmap, 65535);
foreach_snat_protocol
@@ -218,7 +221,7 @@ nat64_alloc_out_addr_and_port (u32 fib_index, snat_protocol_t proto,
nat64_main_t *nm = &nat64_main;
snat_main_t *sm = &snat_main;
int i;
- snat_address_t *a;
+ snat_address_t *a, *ga = 0;
u32 portnum;
for (i = 0; i < vec_len (nm->addr_pool); i++)
@@ -230,22 +233,27 @@ nat64_alloc_out_addr_and_port (u32 fib_index, snat_protocol_t proto,
case SNAT_PROTOCOL_##N: \
if (a->busy_##n##_ports < (65535-1024)) \
{ \
- while (1) \
+ if (a->fib_index == fib_index) \
{ \
- portnum = random_u32 (&sm->random_seed); \
- portnum &= 0xFFFF; \
- if (portnum < 1024) \
- continue; \
- if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
- portnum)) \
- continue; \
- clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
- portnum, 1); \
- a->busy_##n##_ports++; \
- *port = portnum; \
- addr->as_u32 = a->addr.as_u32; \
- return 0; \
- } \
+ while (1) \
+ { \
+ portnum = random_u32 (&sm->random_seed); \
+ portnum &= 0xFFFF; \
+ if (portnum < 1024) \
+ continue; \
+ if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
+ portnum)) \
+ continue; \
+ clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
+ portnum, 1); \
+ a->busy_##n##_ports++; \
+ *port = portnum; \
+ addr->as_u32 = a->addr.as_u32; \
+ return 0; \
+ } \
+ } \
+ else if (a->fib_index == 0) \
+ ga = a; \
} \
break;
foreach_snat_protocol
@@ -254,8 +262,39 @@ nat64_alloc_out_addr_and_port (u32 fib_index, snat_protocol_t proto,
clib_warning ("unknown protocol");
return 1;
}
+ }
+ if (ga)
+ {
+ switch (proto)
+ {
+#define _(N, j, n, s) \
+ case SNAT_PROTOCOL_##N: \
+ while (1) \
+ { \
+ portnum = random_u32 (&sm->random_seed); \
+ portnum &= 0xFFFF; \
+ if (portnum < 1024) \
+ continue; \
+ if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, \
+ portnum)) \
+ continue; \
+ clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, \
+ portnum, 1); \
+ a->busy_##n##_ports++; \
+ *port = portnum; \
+ addr->as_u32 = a->addr.as_u32; \
+ return 0; \
+ }
+ break;
+ foreach_snat_protocol
+#undef _
+ default:
+ clib_warning ("unknown protocol");
+ return 1;
+ }
}
+
/* Totally out of translations to use... */
//TODO: IPFix
return 1;