Force stream reassembly on streams where we didn't yet detect the protocol if the stream is closing.

src/stream-tcp-reassemble.c

@@ -1526,6 +1526,7 @@ int StreamTcpReassembleHandleSegmentUpdateACK (TcpReassemblyThreadCtx *ra_ctx,
     /* check if we have detected the app layer protocol or not. If it has been
        detected then, process data normally, as we have sent one smsg from
        toserver side already to the app layer */
+    if (ssn->state <= TCP_ESTABLISHED) {
         if (!(ssn->flags & STREAMTCP_FLAG_APPPROTO_DETECTION_COMPLETED)) {
             /* Do not perform reassembling of data from server, until the app layer
                proto has been detected and we have sent atleast one smsg from client
@@ -1551,6 +1552,9 @@ int StreamTcpReassembleHandleSegmentUpdateACK (TcpReassemblyThreadCtx *ra_ctx,
             ra_ctx->stream_q->flags &= ~STREAMQUEUE_FLAG_INIT;
             ra_base_seq = stream->ra_base_seq;
             SCLogDebug("the app layer protocol has been detected");
+        } else {
+            ra_base_seq = stream->ra_base_seq;
+        }
     /* set the ra_bas_seq to stream->ra_base_seq as now app layer protocol
        has been detected */
     } else {