support inject mutil packet base current packet

src/session/session_manager.cpp

@@ -290,6 +290,8 @@ static void tcp_update(struct session_manager *mgr, struct session *sess, enum f
      {
           half->isn = tcp_hdr_get_seq(hdr);
      }
+     half->inject_inc_ack_offset = 0;
+     half->inject_inc_seq_offset = 0;
      half->flags = flags;
      half->history |= flags;
      half->seq = tcp_hdr_get_seq(hdr);

src/session/session_priv.h

@@ -27,6 +27,9 @@ struct tcp_half
     struct tcp_segment in_order; // current packet in order segment
     uint32_t in_order_ref;       // reference count of current packet in order segment
 
+    uint32_t inject_inc_seq_offset; // inject packet base on current packet increase seq offset
+    uint32_t inject_inc_ack_offset; // inject packet base on current packet increase ack offset
+
     uint32_t seq;  // current packet sequence number
     uint32_t ack;  // current packet ack number
     uint16_t len;  // current packet payload length