stream: flag TCP streams with gap

src/stream-tcp-private.h

@@ -206,7 +206,8 @@ enum TcpState {
  * Per STREAM flags
  */
 
-// bit 0 vacant
+/** Flag to indicate that we have seen gap on the stream */
+#define STREAMTCP_STREAM_FLAG_HAS_GAP BIT_U16(0)
 /** Flag to avoid stream reassembly/app layer inspection for the stream */
 #define STREAMTCP_STREAM_FLAG_NOREASSEMBLY                  BIT_U16(1)
 /** we received a keep alive */

src/stream-tcp-reassemble.c

@@ -1213,6 +1213,7 @@ static int ReassembleUpdateAppLayer (ThreadVars *tv,
             AppLayerProfilingStore(ra_ctx->app_tctx, p);
 
             StreamTcpSetEvent(p, STREAM_REASSEMBLY_SEQ_GAP);
+            (*stream)->flags |= STREAMTCP_STREAM_FLAG_HAS_GAP;
             StatsIncr(tv, ra_ctx->counter_tcp_reass_gap);
             ssn->lossy_be_liberal = true;