enhance: session manager stat add tcp_segs_consumed

src/session/session.cpp

@@ -206,6 +206,7 @@ struct tcp_segment *session_get_tcp_segment(struct session *sess)
 
     if (half->in_order.data != NULL && half->in_order.len > 0 && half->in_order_ref == 0)
     {
+        sess->mgr_stat->tcp_segs_consumed++;
         half->in_order_ref++;
         return &half->in_order;
     }
@@ -218,6 +219,7 @@ struct tcp_segment *session_get_tcp_segment(struct session *sess)
             session_inc_stat(sess, dir, STAT_TCP_PAYLOADS_REORDERED, seg->len);
 
             // TODO
+            sess->mgr_stat->tcp_segs_consumed++;
             sess->mgr_stat->tcp_segs_reordered++;
         }
         return seg;

src/session/session_manager.h

@@ -82,6 +82,7 @@ struct session_manager_stat
 
     // TCP segments
     uint64_t tcp_segs_input;            // sum
+    uint64_t tcp_segs_consumed;         // sum
     uint64_t tcp_segs_timeout;          // sum
     uint64_t tcp_segs_retransmited;     // sum
     uint64_t tcp_segs_overlapped;       // sum