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authorMatus Fabian <matfabia@cisco.com>2018-10-07 21:28:23 -0700
committerOle Trøan <otroan@employees.org>2018-10-08 11:46:23 +0000
commite2f4e2f175beb6d6490d275049199db7dd61c783 (patch)
tree3b8a5997a835d15aec3b58af5e9bfc7195d12f7c /src/plugins/nat/in2out.c
parent2fd4b56aea5833a4752525d58cac335909190e9c (diff)
NAT44: do not create session record for identity mapping (VPP-1439)
Change-Id: I39a3146a4e4ba8eadf50af7113b9ae6b1c1d688f Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'src/plugins/nat/in2out.c')
-rwxr-xr-xsrc/plugins/nat/in2out.c41
1 files changed, 35 insertions, 6 deletions
diff --git a/src/plugins/nat/in2out.c b/src/plugins/nat/in2out.c
index b6106505331..b99aef3944d 100755
--- a/src/plugins/nat/in2out.c
+++ b/src/plugins/nat/in2out.c
@@ -135,7 +135,7 @@ snat_not_translate (snat_main_t * sm, vlib_node_runtime_t * node,
&value0))
{
/* or is static mappings */
- if (!snat_static_mapping_match (sm, key0, &sm0, 1, 0, 0, 0, 0))
+ if (!snat_static_mapping_match (sm, key0, &sm0, 1, 0, 0, 0, 0, 0))
return 0;
}
else
@@ -236,13 +236,14 @@ slow_path (snat_main_t * sm, vlib_buffer_t * b0,
vlib_node_runtime_t * node, u32 next0, u32 thread_index, f64 now)
{
snat_user_t *u;
- snat_session_t *s;
+ snat_session_t *s = 0;
clib_bihash_kv_8_8_t kv0;
snat_session_key_t key1;
udp_header_t *udp0 = ip4_next_header (ip0);
u8 is_sm = 0;
nat_outside_fib_t *outside_fib;
fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
+ u8 identity_nat;
fib_prefix_t pfx = {
.fp_proto = FIB_PROTOCOL_IP4,
.fp_len = 32,
@@ -263,7 +264,8 @@ slow_path (snat_main_t * sm, vlib_buffer_t * b0,
key1.protocol = key0->protocol;
/* First try to match static mapping by local address and port */
- if (snat_static_mapping_match (sm, *key0, &key1, 0, 0, 0, 0, 0))
+ if (snat_static_mapping_match
+ (sm, *key0, &key1, 0, 0, 0, 0, 0, &identity_nat))
{
/* Try to create dynamic translation */
if (snat_alloc_outside_address_and_port (sm->addresses, rx_fib_index0,
@@ -277,7 +279,15 @@ slow_path (snat_main_t * sm, vlib_buffer_t * b0,
}
}
else
- is_sm = 1;
+ {
+ if (PREDICT_FALSE (identity_nat))
+ {
+ *sessionp = s;
+ return next0;
+ }
+
+ is_sm = 1;
+ }
u = nat_user_get_or_create (sm, &ip0->src_address, rx_fib_index0,
thread_index);
@@ -489,6 +499,12 @@ icmp_match_in2out_slow (snat_main_t * sm, vlib_node_runtime_t * node,
if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
goto out;
+
+ if (!s0)
+ {
+ dont_translate = 1;
+ goto out;
+ }
}
else
{
@@ -558,7 +574,8 @@ icmp_match_in2out_fast (snat_main_t * sm, vlib_node_runtime_t * node,
}
key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match (sm, key0, &sm0, 0, &is_addr_only, 0, 0, 0))
+ if (snat_static_mapping_match
+ (sm, key0, &sm0, 0, &is_addr_only, 0, 0, 0, 0))
{
if (PREDICT_FALSE (snat_not_translate_fast (sm, node, sw_if_index0, ip0,
IP_PROTOCOL_ICMP,
@@ -987,6 +1004,9 @@ snat_in2out_node_fn_inline (vlib_main_t * vm,
&s0, node, next0, thread_index, now);
if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
goto trace00;
+
+ if (PREDICT_FALSE (!s0))
+ goto trace00;
}
else
{
@@ -1163,6 +1183,9 @@ snat_in2out_node_fn_inline (vlib_main_t * vm,
&s1, node, next1, thread_index, now);
if (PREDICT_FALSE (next1 == SNAT_IN2OUT_NEXT_DROP))
goto trace01;
+
+ if (PREDICT_FALSE (!s1))
+ goto trace01;
}
else
{
@@ -1374,6 +1397,9 @@ snat_in2out_node_fn_inline (vlib_main_t * vm,
if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
goto trace0;
+
+ if (PREDICT_FALSE (!s0))
+ goto trace0;
}
else
{
@@ -1717,6 +1743,9 @@ nat44_in2out_reass_node_fn (vlib_main_t * vm,
if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
goto trace0;
+ if (PREDICT_FALSE (!s0))
+ goto trace0;
+
reass0->sess_index = s0 - per_thread_data->sessions;
}
else
@@ -1971,7 +2000,7 @@ snat_in2out_fast_static_map_fn (vlib_main_t * vm,
key0.port = udp0->src_port;
key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match (sm, key0, &sm0, 0, 0, 0, 0, 0))
+ if (snat_static_mapping_match (sm, key0, &sm0, 0, 0, 0, 0, 0, 0))
{
b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
next0 = SNAT_IN2OUT_NEXT_DROP;