diff --git a/src/stream-tcp-reassemble.c b/src/stream-tcp-reassemble.c
index f8c177ba4e..ad2e30310d 100644
--- a/src/stream-tcp-reassemble.c
+++ b/src/stream-tcp-reassemble.c
@@ -331,6 +331,20 @@ static inline uint64_t GetAbsLastAck(const TcpStream *stream)
     }
 }
 
+uint64_t StreamTcpGetAcked(const TcpStream *stream)
+{
+    return GetAbsLastAck(stream);
+}
+
+uint64_t StreamTcpGetUsable(const TcpStream *stream, const bool eof)
+{
+    uint64_t right_edge = STREAM_BASE_OFFSET(stream) + stream->sb.buf_offset;
+    if (!eof && StreamTcpInlineMode() == FALSE) {
+        right_edge = MIN(GetAbsLastAck(stream), right_edge);
+    }
+    return right_edge;
+}
+
 #ifdef UNITTESTS
 /** \internal
  *  \brief check if segments falls before stream 'offset' */
diff --git a/src/stream-tcp.h b/src/stream-tcp.h
index 04e3b78edc..3b4f4fc8a4 100644
--- a/src/stream-tcp.h
+++ b/src/stream-tcp.h
@@ -198,5 +198,8 @@ int TcpSessionPacketSsnReuse(const Packet *p, const Flow *f, const void *tcp_ssn
 void StreamTcpUpdateAppLayerProgress(TcpSession *ssn, char direction,
         const uint32_t progress);
 
+uint64_t StreamTcpGetAcked(const TcpStream *stream);
+uint64_t StreamTcpGetUsable(const TcpStream *stream, const bool eof);
+
 #endif /* __STREAM_TCP_H__ */