QUIC: Add Follow QUIC Stream support to Qt and tshark

The QUIC transport protocol provides a stream, similar to HTTP/2. Make
it possible to look at the stream contents. This can be helpful while
HTTP/3 support is not yet complete.

Known issues that will be addressed in the future:

 - If a single packet contains multiple streams, then Follow QUIC Stream
   will wrongly include data from streams other than the selected one.
   This is tracked by bug 16093 and affects HTTP/2 as well.

 - The Substream index menu does not properly filter for available
   stream numbers. If a non-existing stream is selected, then changing
   to another (potentially valid) index results in the "Capture file
   invalid." error. As workaround, clear the display filter first.

 - Follow Stream always selects Stream ID 0 instead of the first or
   currently selected stream field in a packet. Users should manually
   update the stream index as needed.

Change-Id: I5866be380d58c96f0a71a29abdbd1be20ae3534a
Ping-Bug: 13881
Reviewed-on: https://code.wireshark.org/review/34694
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
Reviewed-by: Anders Broman <a.broman58@gmail.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/epan/dissectors/packet-quic.h b/epan/dissectors/packet-quic.h
new file mode 100644
index 0000000000..5e91881fb0
--- /dev/null
+++ b/epan/dissectors/packet-quic.h
@@ -0,0 +1,26 @@
+/* packet-quic.h
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef __PACKET_QUIC_H__
+#define __PACKET_QUIC_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#include "ws_symbol_export.h"
+
+/** Returns the number of items for quic.connection.number. */
+WS_DLL_PUBLIC guint32 get_quic_connections_count(void);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif  /* __PACKET_QUIC_H__ */