+static void
+tcp_input_trace_frame (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_buffer_t **bs, u16 *nexts, u32 n_bufs, u8 is_ip4)
+{
+ tcp_connection_t *tc;
+ tcp_header_t *tcp;
+ tcp_rx_trace_t *t;
+ u8 flags;
+ int i;
+
+ for (i = 0; i < n_bufs; i++)
+ {
+ if (!(bs[i]->flags & VLIB_BUFFER_IS_TRACED))
+ continue;
+
+ t = vlib_add_trace (vm, node, bs[i], sizeof (*t));
+ if (nexts[i] == TCP_INPUT_NEXT_DROP || nexts[i] == TCP_INPUT_NEXT_PUNT ||
+ nexts[i] == TCP_INPUT_NEXT_RESET)
+ {
+ tc = 0;
+ }
+ else
+ {
+ flags = vnet_buffer (bs[i])->tcp.flags;
+
+ if (flags == TCP_STATE_LISTEN)
+ tc = tcp_listener_get (vnet_buffer (bs[i])->tcp.connection_index);
+ else if (flags == TCP_STATE_SYN_SENT)
+ tc = tcp_half_open_connection_get (
+ vnet_buffer (bs[i])->tcp.connection_index);
+ else
+ tc = tcp_connection_get (vnet_buffer (bs[i])->tcp.connection_index,
+ vm->thread_index);
+ }
+ tcp = tcp_buffer_hdr (bs[i]);
+ tcp_set_rx_trace_data (t, tc, tcp, bs[i], is_ip4);
+ }
+}
+