+VLIB_REGISTER_NODE (nat44_ei_in2out_fast_node) = {
+ .name = "nat44-ei-in2out-fast",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_ei_in2out_fast_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(nat44_ei_in2out_error_strings),
+ .error_strings = nat44_ei_in2out_error_strings,
+
+ .runtime_data_bytes = sizeof (nat44_ei_runtime_t),
+
+ .n_next_nodes = NAT44_EI_IN2OUT_N_NEXT,
+
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [NAT44_EI_IN2OUT_NEXT_DROP] = "error-drop",
+ [NAT44_EI_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
+ [NAT44_EI_IN2OUT_NEXT_SLOW_PATH] = "nat44-ei-in2out-slowpath",
+ [NAT44_EI_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [NAT44_EI_IN2OUT_NEXT_HAIRPINNING_HANDOFF] = "nat44-ei-in2out-hairpinning-handoff-ip4-lookup",
+ },
+};
+
+VLIB_NODE_FN (nat44_ei_in2out_hairpinning_handoff_ip4_lookup_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return nat44_ei_hairpinning_handoff_fn_inline (
+ vm, node, frame,
+ nat44_ei_main.in2out_hairpinning_finish_ip4_lookup_node_fq_index);
+}
+
+VLIB_REGISTER_NODE (nat44_ei_in2out_hairpinning_handoff_ip4_lookup_node) = {
+ .name = "nat44-ei-in2out-hairpinning-handoff-ip4-lookup",
+ .vector_size = sizeof (u32),
+ .n_errors = ARRAY_LEN(nat44_ei_hairpinning_handoff_error_strings),
+ .error_strings = nat44_ei_hairpinning_handoff_error_strings,
+ .format_trace = format_nat44_ei_hairpinning_handoff_trace,
+
+ .n_next_nodes = 1,
+
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+
+VLIB_NODE_FN (nat44_ei_in2out_hairpinning_handoff_interface_output_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return nat44_ei_hairpinning_handoff_fn_inline (
+ vm, node, frame,
+ nat44_ei_main.in2out_hairpinning_finish_interface_output_node_fq_index);
+}
+
+VLIB_REGISTER_NODE (nat44_ei_in2out_hairpinning_handoff_interface_output_node) = {
+ .name = "nat44-ei-in2out-hairpinning-handoff-interface-output",
+ .vector_size = sizeof (u32),
+ .n_errors = ARRAY_LEN(nat44_ei_hairpinning_handoff_error_strings),
+ .error_strings = nat44_ei_hairpinning_handoff_error_strings,
+ .format_trace = format_nat44_ei_hairpinning_handoff_trace,
+
+ .n_next_nodes = 1,
+
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+
+static_always_inline int
+nat44_ei_in2out_hairpinning_finish_inline (vlib_main_t *vm,
+ vlib_node_runtime_t *node,
+ vlib_frame_t *frame)
+{
+ u32 n_left_from, *from, *to_next;
+ u32 thread_index = vm->thread_index;
+ nat44_ei_in2out_next_t next_index;
+ nat44_ei_main_t *nm = &nat44_ei_main;
+ int is_hairpinning = 0;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ u32 sw_if_index0;
+ ip4_header_t *ip0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ icmp46_header_t *icmp0;
+ u32 proto0;
+ u32 required_thread_index = thread_index;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ next0 = NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_LOOKUP;
+
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
+
+ switch (proto0)
+ {
+ case NAT_PROTOCOL_TCP:
+ // fallthrough
+ case NAT_PROTOCOL_UDP:
+ is_hairpinning = nat44_ei_hairpinning (
+ vm, node, nm, thread_index, b0, ip0, udp0, tcp0, proto0,
+ 0 /* do_trace */, &required_thread_index);
+ break;
+ case NAT_PROTOCOL_ICMP:
+ is_hairpinning = (0 == nat44_ei_icmp_hairpinning (
+ nm, b0, thread_index, ip0, icmp0,
+ &required_thread_index));
+ break;
+ case NAT_PROTOCOL_OTHER:
+ // this should never happen
+ next0 = NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_DROP;
+ break;
+ }
+
+ if (thread_index != required_thread_index)
+ {
+ // but we already did a handoff ...
+ next0 = NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_DROP;
+ }
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+ (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_ei_in2out_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->is_hairpinning = is_hairpinning;
+ }
+
+ if (next0 != NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_DROP)
+ {
+ vlib_increment_simple_counter (
+ &nm->counters.fastpath.in2out.other, sw_if_index0,
+ vm->thread_index, 1);
+ }
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ return frame->n_vectors;
+}
+
+VLIB_NODE_FN (nat44_ei_in2out_hairpinning_finish_ip4_lookup_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return nat44_ei_in2out_hairpinning_finish_inline (vm, node, frame);
+}
+
+VLIB_REGISTER_NODE (nat44_ei_in2out_hairpinning_finish_ip4_lookup_node) = {
+ .name = "nat44-ei-in2out-hairpinning-finish-ip4-lookup",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_ei_in2out_fast_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(nat44_ei_in2out_error_strings),
+ .error_strings = nat44_ei_in2out_error_strings,
+
+ .runtime_data_bytes = sizeof (nat44_ei_runtime_t),
+
+ .n_next_nodes = NAT44_EI_IN2OUT_HAIRPINNING_FINISH_N_NEXT,
+
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_DROP] = "error-drop",
+ [NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_LOOKUP] = "ip4-lookup",
+ },
+};
+
+VLIB_NODE_FN (nat44_ei_in2out_hairpinning_finish_interface_output_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return nat44_ei_in2out_hairpinning_finish_inline (vm, node, frame);
+}