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-rw-r--r--vnet/vnet/l2tp/decap.c59
-rw-r--r--vnet/vnet/l2tp/l2tp.c2
-rw-r--r--vnet/vnet/l2tp/l2tp.h1
3 files changed, 48 insertions, 14 deletions
diff --git a/vnet/vnet/l2tp/decap.c b/vnet/vnet/l2tp/decap.c
index 8b9761a60c1..54400281890 100644
--- a/vnet/vnet/l2tp/decap.c
+++ b/vnet/vnet/l2tp/decap.c
@@ -26,7 +26,8 @@
#define foreach_l2t_decap_error \
_(USER_TO_NETWORK, "L2TP user (ip6) to L2 network pkts") \
_(SESSION_ID_MISMATCH, "l2tpv3 local session id mismatches") \
-_(COOKIE_MISMATCH, "l2tpv3 local cookie mismatches")
+_(COOKIE_MISMATCH, "l2tpv3 local cookie mismatches") \
+_(NO_SESSION, "l2tpv3 session not found")
static char * l2t_decap_error_strings[] = {
#define _(sym,string) string,
@@ -114,7 +115,7 @@ static inline u32 last_stage (vlib_main_t *vm, vlib_node_runtime_t *node,
vlib_buffer_t *b = vlib_get_buffer (vm, bi);
l2t_main_t *lm = &l2t_main;
ip6_header_t * ip6 = vlib_buffer_get_current (b);
- vlib_node_t *n = vlib_get_node (vm, l2t_decap_node.index);
+ vlib_node_t *n = vlib_get_node (vm, node->node_index);
u32 node_counter_base_index = n->error_heap_index;
vlib_error_main_t * em = &vm->error_main;
l2tpv3_header_t * l2tp;
@@ -122,6 +123,7 @@ static inline u32 last_stage (vlib_main_t *vm, vlib_node_runtime_t *node,
l2t_session_t * session;
u32 session_index;
u32 next_index;
+ u8 l2tp_decap_local = (l2t_decap_local_node.index == n->index);
/* Other-than-output pkt? We're done... */
if (vnet_buffer(b)->l2t.next_index != L2T_DECAP_NEXT_L2_INPUT) {
@@ -191,16 +193,22 @@ static inline u32 last_stage (vlib_main_t *vm, vlib_node_runtime_t *node,
done:
if (next_index == L2T_DECAP_NEXT_NO_INTERCEPT) {
- // Go to next node on the ip6 configuration chain
- ip6_main_t * im = &ip6_main;
- ip_lookup_main_t * lm = &im->lookup_main;
- ip_config_main_t * cm = &lm->rx_config_mains[VNET_UNICAST];
- ip6_l2tpv3_config_t * c0;
-
- vnet_get_config_data (&cm->config_main,
- &b->current_config_index,
- &next_index,
- sizeof (c0[0]));
+ // Small behavioral change between l2tp-decap and l2tp-decap-local
+ if (l2tp_decap_local) {
+ b->error = node->errors[L2T_DECAP_ERROR_NO_SESSION];
+ next_index = L2T_DECAP_NEXT_DROP;
+ } else {
+ // Go to next node on the ip6 configuration chain
+ ip6_main_t * im = &ip6_main;
+ ip_lookup_main_t * lm = &im->lookup_main;
+ ip_config_main_t * cm = &lm->rx_config_mains[VNET_UNICAST];
+ ip6_l2tpv3_config_t * c0;
+
+ vnet_get_config_data (&cm->config_main,
+ &b->current_config_index,
+ &next_index,
+ sizeof (c0[0]));
+ }
}
if (PREDICT_FALSE(b->flags & VLIB_BUFFER_IS_TRACED)) {
@@ -228,6 +236,12 @@ static uword l2t_decap_node_fn (vlib_main_t * vm,
return dispatch_pipeline (vm, node, frame);
}
+/*
+ * l2tp-decap and l2tp-decap-local have very slightly different behavior.
+ * When a packet has no associated session l2tp-decap let it go to ip6 forward,
+ * while l2tp-decap-local drops it.
+ */
+
VLIB_REGISTER_NODE (l2t_decap_node) = {
.function = l2t_decap_node_fn,
.name = "l2tp-decap",
@@ -249,7 +263,26 @@ VLIB_REGISTER_NODE (l2t_decap_node) = {
VLIB_NODE_FUNCTION_MULTIARCH (l2t_decap_node, l2t_decap_node_fn)
+VLIB_REGISTER_NODE (l2t_decap_local_node) = {
+ .function = l2t_decap_node_fn,
+ .name = "l2tp-decap-local",
+ .vector_size = sizeof (u32),
+ .format_trace = format_l2t_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(l2t_decap_error_strings),
+ .error_strings = l2t_decap_error_strings,
+
+ .n_next_nodes = L2T_DECAP_N_NEXT,
+
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [L2T_DECAP_NEXT_L2_INPUT] = "l2-input",
+ [L2T_DECAP_NEXT_DROP] = "error-drop",
+ },
+};
+
void l2tp_decap_init (void)
{
- ip6_register_protocol (IP_PROTOCOL_L2TP, l2t_decap_node.index);
+ ip6_register_protocol (IP_PROTOCOL_L2TP, l2t_decap_local_node.index);
}
diff --git a/vnet/vnet/l2tp/l2tp.c b/vnet/vnet/l2tp/l2tp.c
index db4b4f5a29b..4380137704b 100644
--- a/vnet/vnet/l2tp/l2tp.c
+++ b/vnet/vnet/l2tp/l2tp.c
@@ -582,7 +582,7 @@ int l2tpv3_interface_enable_disable (vnet_main_t * vnm,
if (pool_is_free_index (vnm->interface_main.sw_interfaces, sw_if_index))
return VNET_API_ERROR_INVALID_SW_IF_INDEX;
- feature_index = im->ip6_unicast_rx_feature_ipsec;
+ feature_index = im->ip6_unicast_rx_feature_l2tp_decap;
ci = rx_cm->config_index_by_sw_if_index[sw_if_index];
ci = (enable_disable
diff --git a/vnet/vnet/l2tp/l2tp.h b/vnet/vnet/l2tp/l2tp.h
index 3f77f70fb5a..2fc90fb9622 100644
--- a/vnet/vnet/l2tp/l2tp.h
+++ b/vnet/vnet/l2tp/l2tp.h
@@ -87,6 +87,7 @@ typedef struct {
l2t_main_t l2t_main;
extern vlib_node_registration_t l2t_encap_node;
extern vlib_node_registration_t l2t_decap_node;
+extern vlib_node_registration_t l2t_decap_local_node;
enum {
SESSION_COUNTER_USER_TO_NETWORK=0,