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authorJuraj Sloboda <jsloboda@cisco.com>2017-04-14 03:24:45 +0200
committerOle Trøan <otroan@employees.org>2017-04-19 07:06:16 +0000
commitd367768270a3d19447af1a7059068e1f20fd15a6 (patch)
treee37a9d4f2e400892008c1750e9ff854007bf2ffa /src/plugins/snat/out2in.c
parent977c1cbc1d37945391dc65848ab819467ad9efd4 (diff)
Support ping from outside network in 1:1 NAT (VPP-695)
Change-Id: Iec8fd4c2bd26874bd8bda82172af797e9b92592c Signed-off-by: Juraj Sloboda <jsloboda@cisco.com>
Diffstat (limited to 'src/plugins/snat/out2in.c')
-rw-r--r--src/plugins/snat/out2in.c49
1 files changed, 27 insertions, 22 deletions
diff --git a/src/plugins/snat/out2in.c b/src/plugins/snat/out2in.c
index f9f8defa90f..3d7b106a210 100644
--- a/src/plugins/snat/out2in.c
+++ b/src/plugins/snat/out2in.c
@@ -86,7 +86,7 @@ vlib_node_registration_t snat_det_out2in_node;
#define foreach_snat_out2in_error \
_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
_(OUT2IN_PACKETS, "Good out2in packets processed") \
-_(BAD_ICMP_TYPE, "icmp type not echo-reply") \
+_(BAD_ICMP_TYPE, "unsupported ICMP type") \
_(NO_TRANSLATION, "No translation")
typedef enum {
@@ -299,6 +299,7 @@ u32 icmp_match_out2in_slow(snat_main_t *sm, vlib_node_runtime_t *node,
snat_session_t *s0 = 0;
u8 dont_translate = 0;
clib_bihash_kv_8_8_t kv0, value0;
+ u8 is_addr_only;
u32 next0 = ~0;
int err;
@@ -322,7 +323,7 @@ u32 icmp_match_out2in_slow(snat_main_t *sm, vlib_node_runtime_t *node,
{
/* Try to match static mapping by external address and port,
destination address and port in packet */
- if (snat_static_mapping_match(sm, key0, &sm0, 1))
+ if (snat_static_mapping_match(sm, key0, &sm0, 1, &is_addr_only))
{
/* Don't NAT packet aimed at the intfc address */
if (PREDICT_FALSE(is_interface_addr(sm, node, sw_if_index0,
@@ -336,8 +337,10 @@ u32 icmp_match_out2in_slow(snat_main_t *sm, vlib_node_runtime_t *node,
goto out;
}
- if (icmp_is_error_message (icmp0))
+ if (PREDICT_FALSE(icmp0->type != ICMP4_echo_reply &&
+ (icmp0->type != ICMP4_echo_request || !is_addr_only)))
{
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
next0 = SNAT_OUT2IN_NEXT_DROP;
goto out;
}
@@ -353,15 +356,18 @@ u32 icmp_match_out2in_slow(snat_main_t *sm, vlib_node_runtime_t *node,
}
}
else
- s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
-
- if (PREDICT_FALSE(icmp0->type != ICMP4_echo_reply &&
- !icmp_is_error_message (icmp0)))
{
- b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
+ if (PREDICT_FALSE(icmp0->type != ICMP4_echo_reply &&
+ icmp0->type != ICMP4_echo_request &&
+ !icmp_is_error_message (icmp0)))
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+
+ s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value0.value);
}
out:
@@ -399,6 +405,7 @@ u32 icmp_match_out2in_fast(snat_main_t *sm, vlib_node_runtime_t *node,
snat_session_key_t key0;
snat_session_key_t sm0;
u8 dont_translate = 0;
+ u8 is_addr_only;
u32 next0 = ~0;
int err;
@@ -416,7 +423,7 @@ u32 icmp_match_out2in_fast(snat_main_t *sm, vlib_node_runtime_t *node,
}
key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, key0, &sm0, 1))
+ if (snat_static_mapping_match(sm, key0, &sm0, 1, &is_addr_only))
{
/* Don't NAT packet aimed at the intfc address */
if (is_interface_addr(sm, node, sw_if_index0, ip0->dst_address.as_u32))
@@ -430,14 +437,12 @@ u32 icmp_match_out2in_fast(snat_main_t *sm, vlib_node_runtime_t *node,
}
if (PREDICT_FALSE(icmp0->type != ICMP4_echo_reply &&
+ (icmp0->type != ICMP4_echo_request || !is_addr_only) &&
!icmp_is_error_message (icmp0)))
{
- if (icmp0->type != ICMP4_echo_request || key0.port != sm0.port)
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
- }
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
}
out:
@@ -717,7 +722,7 @@ snat_out2in_node_fn (vlib_main_t * vm,
{
/* Try to match static mapping by external address and port,
destination address and port in packet */
- if (snat_static_mapping_match(sm, key0, &sm0, 1))
+ if (snat_static_mapping_match(sm, key0, &sm0, 1, 0))
{
b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
/*
@@ -852,7 +857,7 @@ snat_out2in_node_fn (vlib_main_t * vm,
{
/* Try to match static mapping by external address and port,
destination address and port in packet */
- if (snat_static_mapping_match(sm, key1, &sm1, 1))
+ if (snat_static_mapping_match(sm, key1, &sm1, 1, 0))
{
b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
/*
@@ -1021,7 +1026,7 @@ snat_out2in_node_fn (vlib_main_t * vm,
{
/* Try to match static mapping by external address and port,
destination address and port in packet */
- if (snat_static_mapping_match(sm, key0, &sm0, 1))
+ if (snat_static_mapping_match(sm, key0, &sm0, 1, 0))
{
b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
/*
@@ -2025,7 +2030,7 @@ snat_out2in_fast_node_fn (vlib_main_t * vm,
key0.port = udp0->dst_port;
key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, key0, &sm0, 1))
+ if (snat_static_mapping_match(sm, key0, &sm0, 1, 0))
{
b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
goto trace00;