Add SPDY dissector (from SPDYSHARK)

Porting SPDYSHARK Plugin ( http://code.google.com/p/spdyshark/) to built-in dissector

Closed-bug: 9821
Change-Id: I3169ab49e67f67a17e4094a289f4d3a389d610bc
Reviewed-on: https://code.wireshark.org/review/767
Reviewed-by: Michael Mann <mmann78@netscape.net>

1 files changed, 1939 insertions, 0 deletions

diff --git a/epan/dissectors/packet-spdy.c b/epan/dissectors/packet-spdy.c
new file mode 100644
index 0000000000..5c52c22632
--- /dev/null
+++ b/epan/dissectors/packet-spdy.c
@@ -0,0 +1,1939 @@
+/* packet-spdy.c
+ * Routines for SPDY packet disassembly
+ * For now, the protocol spec can be found at
+ * http://dev.chromium.org/spdy/spdy-protocol
+ *
+ * Copyright 2010, Google Inc.
+ * Hasan Khalil <hkhalil@google.com>
+ * Chris Bentzel <cbentzel@google.com>
+ * Eric Shienbrood <ers@google.com>
+ *
+ * Copyright 2013-2014
+ * Alexis La Goutte <alexis.lagoutte@gmail.com>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * Originally based on packet-http.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include <ctype.h>
+
+#include <glib.h>
+#include <epan/conversation.h>
+#include <epan/packet.h>
+#include <epan/wmem/wmem.h>
+
+#include <epan/dissectors/packet-tcp.h>
+#include <epan/dissectors/packet-ssl.h>
+#include <epan/prefs.h>
+#include <epan/expert.h>
+#include <epan/tap.h>
+
+#ifdef HAVE_LIBZ
+#include <zlib.h>
+#endif
+
+#define MIN_SPDY_VERSION 3
+
+#define SPDY_STREAM_ID_MASK 0x7FFFFFFF
+
+/*
+ * Conversation data - used for assembling multi-data-frame
+ * entities and for decompressing request & reply header blocks.
+ */
+typedef struct _spdy_conv_t {
+#ifdef HAVE_LIBZ
+  z_streamp rqst_decompressor;
+  z_streamp rply_decompressor;
+#endif
+  guint32   dictionary_id;
+  wmem_tree_t  *streams;
+} spdy_conv_t;
+
+
+/* The types of SPDY frames */
+#define SPDY_DATA           0
+#define SPDY_SYN_STREAM     1
+#define SPDY_SYN_REPLY      2
+#define SPDY_RST_STREAM     3
+#define SPDY_SETTINGS       4
+#define SPDY_PING           6
+#define SPDY_GOAWAY         7
+#define SPDY_HEADERS        8
+#define SPDY_WINDOW_UPDATE  9
+#define SPDY_CREDENTIAL    10
+#define SPDY_INVALID       11
+
+#define SPDY_FLAG_FIN  0x01
+#define SPDY_FLAG_UNIDIRECTIONAL 0x02
+#define SPDY_FLAG_SETTINGS_CLEAR_SETTINGS 0x01
+
+/* Flags for each setting in a SETTINGS frame. */
+#define SPDY_FLAG_SETTINGS_PERSIST_VALUE 0x01
+#define SPDY_FLAG_SETTINGS_PERSISTED 0x02
+
+#define TCP_PORT_SPDY 6121
+#define SSL_PORT_SPDY 443
+
+static const value_string frame_type_names[] = {
+  { SPDY_DATA,          "DATA" },
+  { SPDY_SYN_STREAM,    "SYN_STREAM" },
+  { SPDY_SYN_REPLY,     "SYN_REPLY" },
+  { SPDY_RST_STREAM,    "RST_STREAM" },
+  { SPDY_SETTINGS,      "SETTINGS" },
+  { SPDY_PING,          "PING" },
+  { SPDY_GOAWAY,        "GOAWAY" },
+  { SPDY_HEADERS,       "HEADERS" },
+  { SPDY_WINDOW_UPDATE, "WINDOW_UPDATE" },
+  { SPDY_CREDENTIAL,    "CREDENTIAL" },
+  { SPDY_INVALID,       "INVALID" },
+  { 0, NULL }
+};
+
+static const value_string rst_stream_status_names[] = {
+  { 1,  "PROTOCOL_ERROR" },
+  { 2,  "INVALID_STREAM" },
+  { 3,  "REFUSED_STREAM" },
+  { 4,  "UNSUPPORTED_VERSION" },
+  { 5,  "CANCEL" },
+  { 6,  "INTERNAL_ERROR" },
+  { 7,  "FLOW_CONTROL_ERROR" },
+  { 8,  "STREAM_IN_USE" },
+  { 9,  "STREAM_ALREADY_CLOSED" },
+  { 10, "INVALID_CREDENTIALS" },
+  { 11, "FRAME_TOO_LARGE" },
+  { 12, "INVALID" },
+  { 0, NULL }
+};
+
+static const value_string setting_id_names[] = {
+  { 1, "UPLOAD_BANDWIDTH" },
+  { 2, "DOWNLOAD_BANDWIDTH" },
+  { 3, "ROUND_TRIP_TIME" },
+  { 4, "MAX_CONCURRENT_STREAMS" },
+  { 5, "CURRENT_CWND" },
+  { 6, "DOWNLOAD_RETRANS_RATE" },
+  { 7, "INITIAL_WINDOW_SIZE" },
+  { 0, NULL }
+};
+
+static const value_string goaway_status_names[] = {
+  { 0,  "OK" },
+  { 1,  "PROTOCOL_ERROR" },
+  { 11, "INTERNAL_ERROR" },
+  { 0, NULL }
+};
+
+/*
+ * This structure will be tied to each SPDY frame and is used as an argument for
+ * dissect_spdy_*_payload() functions.
+ */
+typedef struct _spdy_control_frame_info_t {
+  gboolean control_bit;
+  guint16  version;
+  guint16  type;
+  guint8   flags;
+  guint32  length;  /* Actually only 24 bits. */
+} spdy_control_frame_info_t;
+
+/*
+ * This structure will be tied to each SPDY header frame.
+ * Only applies to frames containing headers: SYN_STREAM, SYN_REPLY, HEADERS
+ * Note that there may be multiple SPDY frames in one packet.
+ */
+typedef struct _spdy_header_info_t {
+  guint32 stream_id;
+  guint8 *header_block;
+  guint   header_block_len;
+  guint16 frame_type;
+} spdy_header_info_t;
+
+/*
+ * This structures keeps track of all the data frames
+ * associated with a stream, so that they can be
+ * reassembled into a single chunk.
+ */
+typedef struct _spdy_data_frame_t {
+  guint8 *data;
+  guint32 length;
+  guint32 framenum;
+} spdy_data_frame_t;
+
+typedef struct _spdy_stream_info_t {
+  gchar *content_type;
+  gchar *content_type_parameters;
+  gchar *content_encoding;
+  wmem_list_t *data_frames;
+  tvbuff_t *assembled_data;
+  guint num_data_frames;
+} spdy_stream_info_t;
+
+/* Handles for metadata population. */
+
+static int spdy_tap = -1;
+static int spdy_eo_tap = -1;
+
+static int proto_spdy = -1;
+static int hf_spdy_data = -1;
+static int hf_spdy_control_bit = -1;
+static int hf_spdy_version = -1;
+static int hf_spdy_type = -1;
+static int hf_spdy_flags = -1;
+static int hf_spdy_flags_fin = -1;
+static int hf_spdy_flags_unidirectional = -1;
+static int hf_spdy_flags_clear_settings = -1;
+static int hf_spdy_flags_persist_value = -1;
+static int hf_spdy_flags_persisted = -1;
+static int hf_spdy_length = -1;
+static int hf_spdy_header_block = -1;
+static int hf_spdy_header = -1;
+static int hf_spdy_header_name = -1;
+static int hf_spdy_header_value = -1;
+static int hf_spdy_streamid = -1;
+static int hf_spdy_associated_streamid = -1;
+static int hf_spdy_priority = -1;
+static int hf_spdy_num_headers = -1;
+static int hf_spdy_rst_stream_status = -1;
+static int hf_spdy_num_settings = -1;
+static int hf_spdy_setting = -1;
+static int hf_spdy_setting_id = -1;
+static int hf_spdy_setting_value = -1;
+static int hf_spdy_ping_id = -1;
+static int hf_spdy_goaway_last_good_stream_id = -1;
+static int hf_spdy_goaway_status = -1;
+static int hf_spdy_window_update_delta = -1;
+
+static gint ett_spdy = -1;
+static gint ett_spdy_flags = -1;
+static gint ett_spdy_header_block = -1;
+static gint ett_spdy_header = -1;
+static gint ett_spdy_setting = -1;
+
+static gint ett_spdy_encoded_entity = -1;
+
+static expert_field ei_spdy_inflation_failed = EI_INIT;
+static expert_field ei_spdy_mal_frame_data = EI_INIT;
+static expert_field ei_spdy_mal_setting_frame = EI_INIT;
+static expert_field ei_spdy_invalid_rst_stream = EI_INIT;
+static expert_field ei_spdy_invalid_go_away = EI_INIT;
+static expert_field ei_spdy_invalid_frame_type = EI_INIT;
+
+static dissector_handle_t data_handle;
+static dissector_handle_t media_handle;
+static dissector_handle_t spdy_handle;
+static dissector_table_t media_type_subdissector_table;
+static dissector_table_t port_subdissector_table;
+
+static gboolean spdy_assemble_entity_bodies = TRUE;
+
+/*
+ * Decompression of zlib encoded entities.
+ */
+#ifdef HAVE_LIBZ
+static gboolean spdy_decompress_body = TRUE;
+static gboolean spdy_decompress_headers = TRUE;
+#else
+static gboolean spdy_decompress_body = FALSE;
+static gboolean spdy_decompress_headers = FALSE;
+#endif
+
+static const char spdy_dictionary[] = {
+  0x00, 0x00, 0x00, 0x07, 0x6f, 0x70, 0x74, 0x69,  /* - - - - o p t i */
+  0x6f, 0x6e, 0x73, 0x00, 0x00, 0x00, 0x04, 0x68,  /* o n s - - - - h */
+  0x65, 0x61, 0x64, 0x00, 0x00, 0x00, 0x04, 0x70,  /* e a d - - - - p */
+  0x6f, 0x73, 0x74, 0x00, 0x00, 0x00, 0x03, 0x70,  /* o s t - - - - p */
+  0x75, 0x74, 0x00, 0x00, 0x00, 0x06, 0x64, 0x65,  /* u t - - - - d e */
+  0x6c, 0x65, 0x74, 0x65, 0x00, 0x00, 0x00, 0x05,  /* l e t e - - - - */
+  0x74, 0x72, 0x61, 0x63, 0x65, 0x00, 0x00, 0x00,  /* t r a c e - - - */
+  0x06, 0x61, 0x63, 0x63, 0x65, 0x70, 0x74, 0x00,  /* - a c c e p t - */
+  0x00, 0x00, 0x0e, 0x61, 0x63, 0x63, 0x65, 0x70,  /* - - - a c c e p */
+  0x74, 0x2d, 0x63, 0x68, 0x61, 0x72, 0x73, 0x65,  /* t - c h a r s e */
+  0x74, 0x00, 0x00, 0x00, 0x0f, 0x61, 0x63, 0x63,  /* t - - - - a c c */
+  0x65, 0x70, 0x74, 0x2d, 0x65, 0x6e, 0x63, 0x6f,  /* e p t - e n c o */
+  0x64, 0x69, 0x6e, 0x67, 0x00, 0x00, 0x00, 0x0f,  /* d i n g - - - - */
+  0x61, 0x63, 0x63, 0x65, 0x70, 0x74, 0x2d, 0x6c,  /* a c c e p t - l */
+  0x61, 0x6e, 0x67, 0x75, 0x61, 0x67, 0x65, 0x00,  /* a n g u a g e - */
+  0x00, 0x00, 0x0d, 0x61, 0x63, 0x63, 0x65, 0x70,  /* - - - a c c e p */
+  0x74, 0x2d, 0x72, 0x61, 0x6e, 0x67, 0x65, 0x73,  /* t - r a n g e s */
+  0x00, 0x00, 0x00, 0x03, 0x61, 0x67, 0x65, 0x00,  /* - - - - a g e - */
+  0x00, 0x00, 0x05, 0x61, 0x6c, 0x6c, 0x6f, 0x77,  /* - - - a l l o w */
+  0x00, 0x00, 0x00, 0x0d, 0x61, 0x75, 0x74, 0x68,  /* - - - - a u t h */
+  0x6f, 0x72, 0x69, 0x7a, 0x61, 0x74, 0x69, 0x6f,  /* o r i z a t i o */
+  0x6e, 0x00, 0x00, 0x00, 0x0d, 0x63, 0x61, 0x63,  /* n - - - - c a c */
+  0x68, 0x65, 0x2d, 0x63, 0x6f, 0x6e, 0x74, 0x72,  /* h e - c o n t r */
+  0x6f, 0x6c, 0x00, 0x00, 0x00, 0x0a, 0x63, 0x6f,  /* o l - - - - c o */
+  0x6e, 0x6e, 0x65, 0x63, 0x74, 0x69, 0x6f, 0x6e,  /* n n e c t i o n */
+  0x00, 0x00, 0x00, 0x0c, 0x63, 0x6f, 0x6e, 0x74,  /* - - - - c o n t */
+  0x65, 0x6e, 0x74, 0x2d, 0x62, 0x61, 0x73, 0x65,  /* e n t - b a s e */
+  0x00, 0x00, 0x00, 0x10, 0x63, 0x6f, 0x6e, 0x74,  /* - - - - c o n t */
+  0x65, 0x6e, 0x74, 0x2d, 0x65, 0x6e, 0x63, 0x6f,  /* e n t - e n c o */
+  0x64, 0x69, 0x6e, 0x67, 0x00, 0x00, 0x00, 0x10,  /* d i n g - - - - */
+  0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d,  /* c o n t e n t - */
+  0x6c, 0x61, 0x6e, 0x67, 0x75, 0x61, 0x67, 0x65,  /* l a n g u a g e */
+  0x00, 0x00, 0x00, 0x0e, 0x63, 0x6f, 0x6e, 0x74,  /* - - - - c o n t */
+  0x65, 0x6e, 0x74, 0x2d, 0x6c, 0x65, 0x6e, 0x67,  /* e n t - l e n g */
+  0x74, 0x68, 0x00, 0x00, 0x00, 0x10, 0x63, 0x6f,  /* t h - - - - c o */
+  0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d, 0x6c, 0x6f,  /* n t e n t - l o */
+  0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x00, 0x00,  /* c a t i o n - - */
+  0x00, 0x0b, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e,  /* - - c o n t e n */
+  0x74, 0x2d, 0x6d, 0x64, 0x35, 0x00, 0x00, 0x00,  /* t - m d 5 - - - */
+  0x0d, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74,  /* - c o n t e n t */
+  0x2d, 0x72, 0x61, 0x6e, 0x67, 0x65, 0x00, 0x00,  /* - r a n g e - - */
+  0x00, 0x0c, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e,  /* - - c o n t e n */
+  0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x00, 0x00,  /* t - t y p e - - */
+  0x00, 0x04, 0x64, 0x61, 0x74, 0x65, 0x00, 0x00,  /* - - d a t e - - */
+  0x00, 0x04, 0x65, 0x74, 0x61, 0x67, 0x00, 0x00,  /* - - e t a g - - */
+  0x00, 0x06, 0x65, 0x78, 0x70, 0x65, 0x63, 0x74,  /* - - e x p e c t */
+  0x00, 0x00, 0x00, 0x07, 0x65, 0x78, 0x70, 0x69,  /* - - - - e x p i */
+  0x72, 0x65, 0x73, 0x00, 0x00, 0x00, 0x04, 0x66,  /* r e s - - - - f */
+  0x72, 0x6f, 0x6d, 0x00, 0x00, 0x00, 0x04, 0x68,  /* r o m - - - - h */
+  0x6f, 0x73, 0x74, 0x00, 0x00, 0x00, 0x08, 0x69,  /* o s t - - - - i */
+  0x66, 0x2d, 0x6d, 0x61, 0x74, 0x63, 0x68, 0x00,  /* f - m a t c h - */
+  0x00, 0x00, 0x11, 0x69, 0x66, 0x2d, 0x6d, 0x6f,  /* - - - i f - m o */
+  0x64, 0x69, 0x66, 0x69, 0x65, 0x64, 0x2d, 0x73,  /* d i f i e d - s */
+  0x69, 0x6e, 0x63, 0x65, 0x00, 0x00, 0x00, 0x0d,  /* i n c e - - - - */
+  0x69, 0x66, 0x2d, 0x6e, 0x6f, 0x6e, 0x65, 0x2d,  /* i f - n o n e - */
+  0x6d, 0x61, 0x74, 0x63, 0x68, 0x00, 0x00, 0x00,  /* m a t c h - - - */
+  0x08, 0x69, 0x66, 0x2d, 0x72, 0x61, 0x6e, 0x67,  /* - i f - r a n g */
+  0x65, 0x00, 0x00, 0x00, 0x13, 0x69, 0x66, 0x2d,  /* e - - - - i f - */
+  0x75, 0x6e, 0x6d, 0x6f, 0x64, 0x69, 0x66, 0x69,  /* u n m o d i f i */
+  0x65, 0x64, 0x2d, 0x73, 0x69, 0x6e, 0x63, 0x65,  /* e d - s i n c e */
+  0x00, 0x00, 0x00, 0x0d, 0x6c, 0x61, 0x73, 0x74,  /* - - - - l a s t */
+  0x2d, 0x6d, 0x6f, 0x64, 0x69, 0x66, 0x69, 0x65,  /* - m o d i f i e */
+  0x64, 0x00, 0x00, 0x00, 0x08, 0x6c, 0x6f, 0x63,  /* d - - - - l o c */
+  0x61, 0x74, 0x69, 0x6f, 0x6e, 0x00, 0x00, 0x00,  /* a t i o n - - - */
+  0x0c, 0x6d, 0x61, 0x78, 0x2d, 0x66, 0x6f, 0x72,  /* - m a x - f o r */
+  0x77, 0x61, 0x72, 0x64, 0x73, 0x00, 0x00, 0x00,  /* w a r d s - - - */
+  0x06, 0x70, 0x72, 0x61, 0x67, 0x6d, 0x61, 0x00,  /* - p r a g m a - */
+  0x00, 0x00, 0x12, 0x70, 0x72, 0x6f, 0x78, 0x79,  /* - - - p r o x y */
+  0x2d, 0x61, 0x75, 0x74, 0x68, 0x65, 0x6e, 0x74,  /* - a u t h e n t */
+  0x69, 0x63, 0x61, 0x74, 0x65, 0x00, 0x00, 0x00,  /* i c a t e - - - */
+  0x13, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2d, 0x61,  /* - p r o x y - a */
+  0x75, 0x74, 0x68, 0x6f, 0x72, 0x69, 0x7a, 0x61,  /* u t h o r i z a */
+  0x74, 0x69, 0x6f, 0x6e, 0x00, 0x00, 0x00, 0x05,  /* t i o n - - - - */
+  0x72, 0x61, 0x6e, 0x67, 0x65, 0x00, 0x00, 0x00,  /* r a n g e - - - */
+  0x07, 0x72, 0x65, 0x66, 0x65, 0x72, 0x65, 0x72,  /* - r e f e r e r */
+  0x00, 0x00, 0x00, 0x0b, 0x72, 0x65, 0x74, 0x72,  /* - - - - r e t r */
+  0x79, 0x2d, 0x61, 0x66, 0x74, 0x65, 0x72, 0x00,  /* y - a f t e r - */
+  0x00, 0x00, 0x06, 0x73, 0x65, 0x72, 0x76, 0x65,  /* - - - s e r v e */
+  0x72, 0x00, 0x00, 0x00, 0x02, 0x74, 0x65, 0x00,  /* r - - - - t e - */
+  0x00, 0x00, 0x07, 0x74, 0x72, 0x61, 0x69, 0x6c,  /* - - - t r a i l */
+  0x65, 0x72, 0x00, 0x00, 0x00, 0x11, 0x74, 0x72,  /* e r - - - - t r */
+  0x61, 0x6e, 0x73, 0x66, 0x65, 0x72, 0x2d, 0x65,  /* a n s f e r - e */
+  0x6e, 0x63, 0x6f, 0x64, 0x69, 0x6e, 0x67, 0x00,  /* n c o d i n g - */
+  0x00, 0x00, 0x07, 0x75, 0x70, 0x67, 0x72, 0x61,  /* - - - u p g r a */
+  0x64, 0x65, 0x00, 0x00, 0x00, 0x0a, 0x75, 0x73,  /* d e - - - - u s */
+  0x65, 0x72, 0x2d, 0x61, 0x67, 0x65, 0x6e, 0x74,  /* e r - a g e n t */
+  0x00, 0x00, 0x00, 0x04, 0x76, 0x61, 0x72, 0x79,  /* - - - - v a r y */
+  0x00, 0x00, 0x00, 0x03, 0x76, 0x69, 0x61, 0x00,  /* - - - - v i a - */
+  0x00, 0x00, 0x07, 0x77, 0x61, 0x72, 0x6e, 0x69,  /* - - - w a r n i */
+  0x6e, 0x67, 0x00, 0x00, 0x00, 0x10, 0x77, 0x77,  /* n g - - - - w w */
+  0x77, 0x2d, 0x61, 0x75, 0x74, 0x68, 0x65, 0x6e,  /* w - a u t h e n */
+  0x74, 0x69, 0x63, 0x61, 0x74, 0x65, 0x00, 0x00,  /* t i c a t e - - */
+  0x00, 0x06, 0x6d, 0x65, 0x74, 0x68, 0x6f, 0x64,  /* - - m e t h o d */
+  0x00, 0x00, 0x00, 0x03, 0x67, 0x65, 0x74, 0x00,  /* - - - - g e t - */
+  0x00, 0x00, 0x06, 0x73, 0x74, 0x61, 0x74, 0x75,  /* - - - s t a t u */
+  0x73, 0x00, 0x00, 0x00, 0x06, 0x32, 0x30, 0x30,  /* s - - - - 2 0 0 */
+  0x20, 0x4f, 0x4b, 0x00, 0x00, 0x00, 0x07, 0x76,  /* - O K - - - - v */
+  0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x00, 0x00,  /* e r s i o n - - */
+  0x00, 0x08, 0x48, 0x54, 0x54, 0x50, 0x2f, 0x31,  /* - - H T T P - 1 */
+  0x2e, 0x31, 0x00, 0x00, 0x00, 0x03, 0x75, 0x72,  /* - 1 - - - - u r */
+  0x6c, 0x00, 0x00, 0x00, 0x06, 0x70, 0x75, 0x62,  /* l - - - - p u b */
+  0x6c, 0x69, 0x63, 0x00, 0x00, 0x00, 0x0a, 0x73,  /* l i c - - - - s */
+  0x65, 0x74, 0x2d, 0x63, 0x6f, 0x6f, 0x6b, 0x69,  /* e t - c o o k i */
+  0x65, 0x00, 0x00, 0x00, 0x0a, 0x6b, 0x65, 0x65,  /* e - - - - k e e */
+  0x70, 0x2d, 0x61, 0x6c, 0x69, 0x76, 0x65, 0x00,  /* p - a l i v e - */
+  0x00, 0x00, 0x06, 0x6f, 0x72, 0x69, 0x67, 0x69,  /* - - - o r i g i */
+  0x6e, 0x31, 0x30, 0x30, 0x31, 0x30, 0x31, 0x32,  /* n 1 0 0 1 0 1 2 */
+  0x30, 0x31, 0x32, 0x30, 0x32, 0x32, 0x30, 0x35,  /* 0 1 2 0 2 2 0 5 */
+  0x32, 0x30, 0x36, 0x33, 0x30, 0x30, 0x33, 0x30,  /* 2 0 6 3 0 0 3 0 */
+  0x32, 0x33, 0x30, 0x33, 0x33, 0x30, 0x34, 0x33,  /* 2 3 0 3 3 0 4 3 */
+  0x30, 0x35, 0x33, 0x30, 0x36, 0x33, 0x30, 0x37,  /* 0 5 3 0 6 3 0 7 */
+  0x34, 0x30, 0x32, 0x34, 0x30, 0x35, 0x34, 0x30,  /* 4 0 2 4 0 5 4 0 */
+  0x36, 0x34, 0x30, 0x37, 0x34, 0x30, 0x38, 0x34,  /* 6 4 0 7 4 0 8 4 */
+  0x30, 0x39, 0x34, 0x31, 0x30, 0x34, 0x31, 0x31,  /* 0 9 4 1 0 4 1 1 */
+  0x34, 0x31, 0x32, 0x34, 0x31, 0x33, 0x34, 0x31,  /* 4 1 2 4 1 3 4 1 */
+  0x34, 0x34, 0x31, 0x35, 0x34, 0x31, 0x36, 0x34,  /* 4 4 1 5 4 1 6 4 */
+  0x31, 0x37, 0x35, 0x30, 0x32, 0x35, 0x30, 0x34,  /* 1 7 5 0 2 5 0 4 */
+  0x35, 0x30, 0x35, 0x32, 0x30, 0x33, 0x20, 0x4e,  /* 5 0 5 2 0 3 - N */
+  0x6f, 0x6e, 0x2d, 0x41, 0x75, 0x74, 0x68, 0x6f,  /* o n - A u t h o */
+  0x72, 0x69, 0x74, 0x61, 0x74, 0x69, 0x76, 0x65,  /* r i t a t i v e */
+  0x20, 0x49, 0x6e, 0x66, 0x6f, 0x72, 0x6d, 0x61,  /* - I n f o r m a */
+  0x74, 0x69, 0x6f, 0x6e, 0x32, 0x30, 0x34, 0x20,  /* t i o n 2 0 4 - */
+  0x4e, 0x6f, 0x20, 0x43, 0x6f, 0x6e, 0x74, 0x65,  /* N o - C o n t e */
+  0x6e, 0x74, 0x33, 0x30, 0x31, 0x20, 0x4d, 0x6f,  /* n t 3 0 1 - M o */
+  0x76, 0x65, 0x64, 0x20, 0x50, 0x65, 0x72, 0x6d,  /* v e d - P e r m */
+  0x61, 0x6e, 0x65, 0x6e, 0x74, 0x6c, 0x79, 0x34,  /* a n e n t l y 4 */
+  0x30, 0x30, 0x20, 0x42, 0x61, 0x64, 0x20, 0x52,  /* 0 0 - B a d - R */
+  0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x34, 0x30,  /* e q u e s t 4 0 */
+  0x31, 0x20, 0x55, 0x6e, 0x61, 0x75, 0x74, 0x68,  /* 1 - U n a u t h */
+  0x6f, 0x72, 0x69, 0x7a, 0x65, 0x64, 0x34, 0x30,  /* o r i z e d 4 0 */
+  0x33, 0x20, 0x46, 0x6f, 0x72, 0x62, 0x69, 0x64,  /* 3 - F o r b i d */
+  0x64, 0x65, 0x6e, 0x34, 0x30, 0x34, 0x20, 0x4e,  /* d e n 4 0 4 - N */
+  0x6f, 0x74, 0x20, 0x46, 0x6f, 0x75, 0x6e, 0x64,  /* o t - F o u n d */
+  0x35, 0x30, 0x30, 0x20, 0x49, 0x6e, 0x74, 0x65,  /* 5 0 0 - I n t e */
+  0x72, 0x6e, 0x61, 0x6c, 0x20, 0x53, 0x65, 0x72,  /* r n a l - S e r */
+  0x76, 0x65, 0x72, 0x20, 0x45, 0x72, 0x72, 0x6f,  /* v e r - E r r o */
+  0x72, 0x35, 0x30, 0x31, 0x20, 0x4e, 0x6f, 0x74,  /* r 5 0 1 - N o t */
+  0x20, 0x49, 0x6d, 0x70, 0x6c, 0x65, 0x6d, 0x65,  /* - I m p l e m e */
+  0x6e, 0x74, 0x65, 0x64, 0x35, 0x30, 0x33, 0x20,  /* n t e d 5 0 3 - */
+  0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x20,  /* S e r v i c e - */
+  0x55, 0x6e, 0x61, 0x76, 0x61, 0x69, 0x6c, 0x61,  /* U n a v a i l a */
+  0x62, 0x6c, 0x65, 0x4a, 0x61, 0x6e, 0x20, 0x46,  /* b l e J a n - F */
+  0x65, 0x62, 0x20, 0x4d, 0x61, 0x72, 0x20, 0x41,  /* e b - M a r - A */
+  0x70, 0x72, 0x20, 0x4d, 0x61, 0x79, 0x20, 0x4a,  /* p r - M a y - J */
+  0x75, 0x6e, 0x20, 0x4a, 0x75, 0x6c, 0x20, 0x41,  /* u n - J u l - A */
+  0x75, 0x67, 0x20, 0x53, 0x65, 0x70, 0x74, 0x20,  /* u g - S e p t - */
+  0x4f, 0x63, 0x74, 0x20, 0x4e, 0x6f, 0x76, 0x20,  /* O c t - N o v - */
+  0x44, 0x65, 0x63, 0x20, 0x30, 0x30, 0x3a, 0x30,  /* D e c - 0 0 - 0 */
+  0x30, 0x3a, 0x30, 0x30, 0x20, 0x4d, 0x6f, 0x6e,  /* 0 - 0 0 - M o n */
+  0x2c, 0x20, 0x54, 0x75, 0x65, 0x2c, 0x20, 0x57,  /* - - T u e - - W */
+  0x65, 0x64, 0x2c, 0x20, 0x54, 0x68, 0x75, 0x2c,  /* e d - - T h u - */
+  0x20, 0x46, 0x72, 0x69, 0x2c, 0x20, 0x53, 0x61,  /* - F r i - - S a */
+  0x74, 0x2c, 0x20, 0x53, 0x75, 0x6e, 0x2c, 0x20,  /* t - - S u n - - */
+  0x47, 0x4d, 0x54, 0x63, 0x68, 0x75, 0x6e, 0x6b,  /* G M T c h u n k */
+  0x65, 0x64, 0x2c, 0x74, 0x65, 0x78, 0x74, 0x2f,  /* e d - t e x t - */
+  0x68, 0x74, 0x6d, 0x6c, 0x2c, 0x69, 0x6d, 0x61,  /* h t m l - i m a */
+  0x67, 0x65, 0x2f, 0x70, 0x6e, 0x67, 0x2c, 0x69,  /* g e - p n g - i */
+  0x6d, 0x61, 0x67, 0x65, 0x2f, 0x6a, 0x70, 0x67,  /* m a g e - j p g */
+  0x2c, 0x69, 0x6d, 0x61, 0x67, 0x65, 0x2f, 0x67,  /* - i m a g e - g */
+  0x69, 0x66, 0x2c, 0x61, 0x70, 0x70, 0x6c, 0x69,  /* i f - a p p l i */
+  0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2f, 0x78,  /* c a t i o n - x */
+  0x6d, 0x6c, 0x2c, 0x61, 0x70, 0x70, 0x6c, 0x69,  /* m l - a p p l i */
+  0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2f, 0x78,  /* c a t i o n - x */
+  0x68, 0x74, 0x6d, 0x6c, 0x2b, 0x78, 0x6d, 0x6c,  /* h t m l - x m l */
+  0x2c, 0x74, 0x65, 0x78, 0x74, 0x2f, 0x70, 0x6c,  /* - t e x t - p l */
+  0x61, 0x69, 0x6e, 0x2c, 0x74, 0x65, 0x78, 0x74,  /* a i n - t e x t */
+  0x2f, 0x6a, 0x61, 0x76, 0x61, 0x73, 0x63, 0x72,  /* - j a v a s c r */
+  0x69, 0x70, 0x74, 0x2c, 0x70, 0x75, 0x62, 0x6c,  /* i p t - p u b l */
+  0x69, 0x63, 0x70, 0x72, 0x69, 0x76, 0x61, 0x74,  /* i c p r i v a t */
+  0x65, 0x6d, 0x61, 0x78, 0x2d, 0x61, 0x67, 0x65,  /* e m a x - a g e */
+  0x3d, 0x67, 0x7a, 0x69, 0x70, 0x2c, 0x64, 0x65,  /* - g z i p - d e */
+  0x66, 0x6c, 0x61, 0x74, 0x65, 0x2c, 0x73, 0x64,  /* f l a t e - s d */
+  0x63, 0x68, 0x63, 0x68, 0x61, 0x72, 0x73, 0x65,  /* c h c h a r s e */
+  0x74, 0x3d, 0x75, 0x74, 0x66, 0x2d, 0x38, 0x63,  /* t - u t f - 8 c */
+  0x68, 0x61, 0x72, 0x73, 0x65, 0x74, 0x3d, 0x69,  /* h a r s e t - i */
+  0x73, 0x6f, 0x2d, 0x38, 0x38, 0x35, 0x39, 0x2d,  /* s o - 8 8 5 9 - */
+  0x31, 0x2c, 0x75, 0x74, 0x66, 0x2d, 0x2c, 0x2a,  /* 1 - u t f - - - */
+  0x2c, 0x65, 0x6e, 0x71, 0x3d, 0x30, 0x2e         /* - e n q - 0 -   */
+};
+
+/*
+ * Returns conversation data for a given packet. If conversation data can't be
+ * found, creates and returns new conversation data.
+ */
+static spdy_conv_t * get_or_create_spdy_conversation_data(packet_info *pinfo) {
+  conversation_t  *conversation;
+  spdy_conv_t *conv_data;
+#ifdef HAVE_LIBZ
+  int retcode;
+#endif
+
+  conversation = find_or_create_conversation(pinfo);
+
+  /* Retrieve information from conversation */
+  conv_data = (spdy_conv_t *)conversation_get_proto_data(conversation, proto_spdy);
+  if (!conv_data) {
+    /* Set up the conversation structure itself */
+    conv_data = (spdy_conv_t *)wmem_alloc0(wmem_file_scope(), sizeof(spdy_conv_t));
+
+    conv_data->streams = NULL;
+    if (spdy_decompress_headers) {
+#ifdef HAVE_LIBZ
+      conv_data->rqst_decompressor = (z_streamp)wmem_alloc0(wmem_file_scope(), sizeof(z_stream));
+      conv_data->rply_decompressor = (z_streamp)wmem_alloc0(wmem_file_scope(), sizeof(z_stream));
+      retcode = inflateInit(conv_data->rqst_decompressor);
+      if (retcode == Z_OK) {
+        retcode = inflateInit(conv_data->rply_decompressor);
+      }
+
+      /* XXX - use wsutil/adler32.h? */
+      conv_data->dictionary_id = adler32(0L, Z_NULL, 0);
+      conv_data->dictionary_id = adler32(conv_data->dictionary_id,
+                                         spdy_dictionary,
+                                         sizeof(spdy_dictionary));
+#endif
+    }
+
+    conversation_add_proto_data(conversation, proto_spdy, conv_data);
+  }
+
+  return conv_data;
+}
+
+/*
+ * Retains state on a given stream.
+ */
+static void spdy_save_stream_info(spdy_conv_t *conv_data,
+                                  guint32 stream_id,
+                                  gchar *content_type,
+                                  gchar *content_type_params,
+                                  gchar *content_encoding) {
+  spdy_stream_info_t *si;
+
+  if (conv_data->streams == NULL) {
+    conv_data->streams = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());
+  }
+
+  si = (spdy_stream_info_t *)wmem_alloc(wmem_file_scope(), sizeof(spdy_stream_info_t));
+  si->content_type = content_type;
+  si->content_type_parameters = content_type_params;
+  si->content_encoding = content_encoding;
+  si->data_frames = wmem_list_new(wmem_file_scope());
+  si->num_data_frames = 0;
+  si->assembled_data = NULL;
+  wmem_tree_insert32(conv_data->streams, stream_id, si);
+}
+
+/*
+ * Retrieves previously saved state on a given stream.
+ */
+static spdy_stream_info_t* spdy_get_stream_info(spdy_conv_t *conv_data,
+                                                guint32 stream_id)
+{
+  if (conv_data->streams == NULL)
+    return NULL;
+
+  return (spdy_stream_info_t*)wmem_tree_lookup32(conv_data->streams, stream_id);
+}
+
+/*
+ * Adds a data chunk to a given SPDY converstaion/stream.
+ */
+static void spdy_add_data_chunk(spdy_conv_t *conv_data,
+                                guint32 stream_id,
+                                guint32 frame,
+                                guint8 *data,
+                                guint32 length)
+{
+  spdy_stream_info_t *si = spdy_get_stream_info(conv_data, stream_id);
+
+  if (si != NULL) {
+    spdy_data_frame_t *df = (spdy_data_frame_t *)wmem_new(wmem_file_scope(), spdy_data_frame_t);
+    df->data = data;
+    df->length = length;
+    df->framenum = frame;
+    wmem_list_append(si->data_frames, df);
+    ++si->num_data_frames;
+  }
+}
+
+/*
+ * Increment the count of DATA frames found on a given stream.
+ */
+static void spdy_increment_data_chunk_count(spdy_conv_t *conv_data,
+                                            guint32 stream_id) {
+  spdy_stream_info_t *si = spdy_get_stream_info(conv_data, stream_id);
+  if (si != NULL) {
+    ++si->num_data_frames;
+  }
+}
+
+/*
+ * Return the number of data frames saved so far for the specified stream.
+ */
+static guint spdy_get_num_data_frames(spdy_conv_t *conv_data,
+                                      guint32 stream_id) {
+  spdy_stream_info_t *si = spdy_get_stream_info(conv_data, stream_id);
+
+  return si == NULL ? 0 : si->num_data_frames;
+}
+
+/*
+ * Reassembles DATA frames for a given stream into one tvb.
+ */
+static spdy_stream_info_t* spdy_assemble_data_frames(spdy_conv_t *conv_data,
+                                                     guint32 stream_id) {
+  spdy_stream_info_t *si = spdy_get_stream_info(conv_data, stream_id);
+  tvbuff_t *tvb;
+
+  if (si == NULL) {
+    return NULL;
+  }
+
+  /*
+   * Compute the total amount of data and concatenate the
+   * data chunks, if it hasn't already been done.
+   */
+  if (si->assembled_data == NULL) {
+    spdy_data_frame_t *df;
+    guint8 *data;
+    guint32 datalen;
+    guint32 offset;
+    wmem_list_t *dflist = si->data_frames;
+    wmem_list_frame_t *frame;
+    if (wmem_list_count(dflist) == 0) {
+      return si;
+    }
+    datalen = 0;
+    /*
+     * It'd be nice to use a composite tvbuff here, but since
+     * only a real-data tvbuff can be the child of another
+     * tvb, we can't. It would be nice if this limitation
+     * could be fixed.
+     */
+    frame = wmem_list_frame_next(wmem_list_head(dflist));
+    while (frame != NULL) {
+      df = (spdy_data_frame_t *)wmem_list_frame_data(frame);
+      datalen += df->length;
+      frame = wmem_list_frame_next(frame);
+    }
+    if (datalen != 0) {
+      data = (guint8 *)wmem_alloc(wmem_file_scope(), datalen);
+      dflist = si->data_frames;
+      offset = 0;
+      frame = wmem_list_frame_next(wmem_list_head(dflist));
+      while (dflist != NULL) {
+        df = (spdy_data_frame_t *)wmem_list_frame_data(frame);
+        memcpy(data+offset, df->data, df->length);
+        offset += df->length;
+        frame = wmem_list_frame_next(frame);
+      }
+      tvb = tvb_new_real_data(data, datalen, datalen);
+      si->assembled_data = tvb;
+    }
+  }
+  return si;
+}
+
+/*
+ * Same as dissect_spdy_stream_id below, except with explicit field index.
+ */
+static void dissect_spdy_stream_id_field(tvbuff_t *tvb,
+                                         int offset,
+                                         packet_info *pinfo,
+                                         proto_tree *frame_tree,
+                                         const int hfindex)
+{
+  guint32 stream_id = tvb_get_ntohl(tvb, offset) & SPDY_STREAM_ID_MASK;
+  /* Add stream id to info column. */
+  if (hfindex == hf_spdy_streamid) {
+    col_append_fstr(pinfo->cinfo, COL_INFO, " Stream=%u", stream_id);
+  }
+
+  /* Add stream id to tree. */
+  proto_tree_add_item(frame_tree, hfindex, tvb, offset, 4, ENC_BIG_ENDIAN);
+  if (hfindex == hf_spdy_streamid) {
+    proto_item_append_text(frame_tree, ", Stream: %u", stream_id);
+  }
+}
+
+/*
+ * Adds flag details to proto tree.
+ */
+static void dissect_spdy_flags(tvbuff_t *tvb,
+                               int offset,
+                               proto_tree *frame_tree,
+                               const spdy_control_frame_info_t *frame) {
+  proto_item *flags_ti;
+  proto_tree *flags_tree;
+
+  /* Create flags substree. */
+  flags_ti = proto_tree_add_item(frame_tree, hf_spdy_flags, tvb, offset, 1, ENC_BIG_ENDIAN);
+  flags_tree = proto_item_add_subtree(flags_ti, ett_spdy_flags);
+
+  /* Add FIN flag for appropriate frames. */
+  if (frame->type == SPDY_DATA ||
+      frame->type == SPDY_SYN_STREAM ||
+      frame->type == SPDY_SYN_REPLY ||
+      frame->type == SPDY_HEADERS) {
+    /* Add FIN flag. */
+    proto_tree_add_item(flags_tree, hf_spdy_flags_fin, tvb, offset, 1, ENC_BIG_ENDIAN);
+    if (frame->flags & SPDY_FLAG_FIN) {
+      proto_item_append_text(frame_tree, " (FIN)");
+      proto_item_append_text(flags_ti, " (FIN)");
+    }
+  }
+
+  /* Add UNIDIRECTIONAL flag, only applicable for SYN_STREAM. */
+  if (frame->type == SPDY_SYN_STREAM) {
+    proto_tree_add_item(flags_tree, hf_spdy_flags_unidirectional, tvb,
+                        offset, 1, ENC_BIG_ENDIAN);
+    if (frame->flags & SPDY_FLAG_UNIDIRECTIONAL) {
+      proto_item_append_text(flags_ti, " (UNIDIRECTIONAL)");
+    }
+  }
+
+  /* Add CLEAR_SETTINGS flag, only applicable for SETTINGS. */
+  if (frame->type == SPDY_SETTINGS) {
+    proto_tree_add_item(flags_tree, hf_spdy_flags_clear_settings, tvb,
+                        offset, 1, ENC_BIG_ENDIAN);
+    if (frame->flags & SPDY_FLAG_SETTINGS_CLEAR_SETTINGS) {
+      proto_item_append_text(flags_ti, " (CLEAR)");
+    }
+  }
+}
+
+/*
+ * Performs DATA frame payload dissection.
+ */
+static int dissect_spdy_data_payload(tvbuff_t *tvb,
+                                     int offset,
+                                     packet_info *pinfo,
+                                     proto_tree *top_level_tree,
+                                     proto_tree *spdy_tree,
+                                     proto_item *spdy_proto,
+                                     spdy_conv_t *conv_data,
+                                     guint32 stream_id,
+                                     const spdy_control_frame_info_t *frame)
+{
+  dissector_handle_t handle;
+  guint num_data_frames;
+  gboolean dissected;
+
+  col_add_fstr(pinfo->cinfo, COL_INFO, "DATA Stream=%d Length=%d",
+               stream_id, frame->length);
+
+  /* Add frame description. */
+  proto_item_append_text(spdy_proto, ", Stream: %d, Length: %d",
+                           stream_id,
+                           frame->length);
+
+  /* Add data. */
+  proto_tree_add_item(spdy_tree, hf_spdy_data, tvb, offset, frame->length, ENC_NA);
+
+  num_data_frames = spdy_get_num_data_frames(conv_data, stream_id);
+  if (frame->length != 0 || num_data_frames != 0) {
+    /*
+     * There's stuff left over; process it.
+     */
+    tvbuff_t *next_tvb = NULL;
+    tvbuff_t    *data_tvb = NULL;
+    spdy_stream_info_t *si = NULL;
+    void *save_private_data = NULL;
+    guint8 *copied_data;
+    gboolean private_data_changed = FALSE;
+    gboolean is_single_chunk = FALSE;
+    gboolean have_entire_body;
+
+    /*
+     * Create a tvbuff for the payload.
+     */
+    if (frame->length != 0) {
+      next_tvb = tvb_new_subset_length(tvb, offset, frame->length);
+      is_single_chunk = num_data_frames == 0 &&
+          (frame->flags & SPDY_FLAG_FIN) != 0;
+      if (!pinfo->fd->flags.visited) {
+        if (!is_single_chunk) {
+          if (spdy_assemble_entity_bodies) {
+            copied_data = (guint8 *)tvb_memdup(wmem_packet_scope(),next_tvb, 0, frame->length);
+            spdy_add_data_chunk(conv_data, stream_id, pinfo->fd->num, copied_data, frame->length);
+          } else {
+            spdy_increment_data_chunk_count(conv_data, stream_id);
+          }
+        }
+      }
+    } else {
+      is_single_chunk = (num_data_frames == 1);
+    }
+
+    if (!(frame->flags & SPDY_FLAG_FIN)) {
+      col_set_fence(pinfo->cinfo, COL_INFO);
+      col_add_fstr(pinfo->cinfo, COL_INFO, " (partial entity)");
+      proto_item_append_text(spdy_proto, " (partial entity body)");
+      /* would like the proto item to say */
+      /* " (entity body fragment N of M)" */
+      goto body_dissected;
+    }
+    have_entire_body = is_single_chunk;
+    /*
+     * On seeing the last data frame in a stream, we can
+     * reassemble the frames into one data block.
+     */
+    si = spdy_assemble_data_frames(conv_data, stream_id);
+    if (si == NULL) {
+      goto body_dissected;
+    }
+    data_tvb = si->assembled_data;
+    if (spdy_assemble_entity_bodies) {
+      have_entire_body = TRUE;
+    }
+
+    if (!have_entire_body) {
+      goto body_dissected;
+    }
+
+    if (data_tvb == NULL) {
+      data_tvb = next_tvb;
+    } else {
+      add_new_data_source(pinfo, data_tvb, "Assembled entity body");
+    }
+
+    if (have_entire_body && si->content_encoding != NULL &&
+      g_ascii_strcasecmp(si->content_encoding, "identity") != 0) {
+      /*
+       * We currently can't handle, for example, "compress";
+       * just handle them as data for now.
+       *
+       * After July 7, 2004 the LZW patent expires, so support
+       * might be added then.  However, I don't think that
+       * anybody ever really implemented "compress", due to
+       * the aforementioned patent.
+       */
+      tvbuff_t *uncomp_tvb = NULL;
+      proto_item *e_ti = NULL;
+      proto_item *ce_ti = NULL;
+      proto_tree *e_tree = NULL;
+
+      if (spdy_decompress_body &&
+          (g_ascii_strcasecmp(si->content_encoding, "gzip") == 0 ||
+           g_ascii_strcasecmp(si->content_encoding, "deflate") == 0)) {
+        uncomp_tvb = tvb_child_uncompress(tvb, data_tvb, 0,
+                                               tvb_length(data_tvb));
+      }
+      /*
+       * Add the encoded entity to the protocol tree
+       */
+      e_ti = proto_tree_add_text(top_level_tree, data_tvb,
+                                 0, tvb_length(data_tvb),
+                                 "Content-encoded entity body (%s): %u bytes",
+                                 si->content_encoding,
+                                 tvb_length(data_tvb));
+      e_tree = proto_item_add_subtree(e_ti, ett_spdy_encoded_entity);
+      if (si->num_data_frames > 1) {
+        wmem_list_t *dflist = si->data_frames;
+        wmem_list_frame_t *frame_item;
+        spdy_data_frame_t *df;
+        guint32 framenum;
+        ce_ti = proto_tree_add_text(e_tree, data_tvb, 0,
+                                    tvb_length(data_tvb),
+                                    "Assembled from %d frames in packet(s)",
+                                    si->num_data_frames);
+        framenum = 0;
+        frame_item = wmem_list_frame_next(wmem_list_head(dflist));
+        while (frame_item != NULL) {
+          df = (spdy_data_frame_t *)wmem_list_frame_data(frame_item);
+          if (framenum != df->framenum) {
+            proto_item_append_text(ce_ti, " #%u", df->framenum);
+            framenum = df->framenum;
+          }
+          frame_item = wmem_list_frame_next(frame_item);
+        }
+      }
+
+      if (uncomp_tvb != NULL) {
+        /*
+         * Decompression worked
+         */
+
+        /* XXX - Don't free this, since it's possible
+         * that the data was only partially
+         * decompressed, such as when desegmentation
+         * isn't enabled.
+         *
+         tvb_free(next_tvb);
+         */
+        proto_item_append_text(e_ti, " -> %u bytes", tvb_length(uncomp_tvb));
+        data_tvb = uncomp_tvb;
+        add_new_data_source(pinfo, data_tvb, "Uncompressed entity body");
+      } else {
+        if (spdy_decompress_body) {
+          proto_item_append_text(e_ti, " [Error: Decompression failed]");
+        }
+        call_dissector(data_handle, data_tvb, pinfo, e_tree);
+
+        goto body_dissected;
+      }
+    }
+    if (si != NULL) {
+      wmem_destroy_list(si->data_frames);
+    }
+    /*
+     * Do subdissector checks.
+     *
+     * First, check whether some subdissector asked that they
+     * be called if something was on some particular port.
+     */
+
+    if (have_entire_body && port_subdissector_table != NULL) {
+      handle = dissector_get_uint_handle(port_subdissector_table,
+                                         pinfo->match_uint);
+    } else {
+      handle = NULL;
+    }
+    if (handle == NULL && have_entire_body && si->content_type != NULL &&
+      media_type_subdissector_table != NULL) {
+      /*
+       * We didn't find any subdissector that
+       * registered for the port, and we have a
+       * Content-Type value.  Is there any subdissector
+       * for that content type?
+       */
+      save_private_data = pinfo->private_data;
+      private_data_changed = TRUE;
+
+      if (si->content_type_parameters) {
+        pinfo->private_data = wmem_strdup(wmem_packet_scope(), si->content_type_parameters);
+      } else {
+        pinfo->private_data = NULL;
+      }
+      /*
+       * Calling the string handle for the media type
+       * dissector table will set pinfo->match_string
+       * to si->content_type for us.
+       */
+      pinfo->match_string = si->content_type;
+      handle = dissector_get_string_handle(media_type_subdissector_table,
+                                           si->content_type);
+    }
+    if (handle != NULL) {
+      /*
+       * We have a subdissector - call it.
+       */
+      dissected = call_dissector(handle, data_tvb, pinfo, top_level_tree);
+    } else {
+      dissected = FALSE;
+    }
+
+    if (!dissected && have_entire_body && si->content_type != NULL) {
+      /*
+       * Calling the default media handle if there is a content-type that
+       * wasn't handled above.
+       */
+      call_dissector(media_handle, next_tvb, pinfo, top_level_tree);
+    } else {
+      /* Call the default data dissector */
+      call_dissector(data_handle, next_tvb, pinfo, top_level_tree);
+    }
+
+body_dissected:
+    /*
+     * Do *not* attempt at freeing the private data;
+     * it may be in use by subdissectors.
+     */
+    if (private_data_changed) { /*restore even NULL value*/
+      pinfo->private_data = save_private_data;
+    }
+    /*
+     * We've processed frame->length bytes worth of data
+     * (which may be no data at all); advance the
+     * offset past whatever data we've processed.
+     */
+  }
+  return frame->length;
+}
+
+#ifdef HAVE_LIBZ
+/*
+ * Performs header decompression.
+ *
+ * The returned buffer is automatically scoped to the lifetime of the capture
+ * (via se_memdup()).
+ */
+static guint8* spdy_decompress_header_block(tvbuff_t *tvb,
+                                            z_streamp decomp,
+                                            guint32 dictionary_id,
+                                            int offset,
+                                            guint32 length,
+                                            guint *uncomp_length) {
+  int retcode;
+  size_t bufsize = 16384;
+  const guint8 *hptr = tvb_get_ptr(tvb, offset, length);
+  guint8 *uncomp_block = (guint8 *)wmem_alloc(wmem_packet_scope(), bufsize);
+  decomp->next_in = (Bytef *)hptr;
+  decomp->avail_in = length;
+  decomp->next_out = uncomp_block;
+  decomp->avail_out = bufsize;
+  retcode = inflate(decomp, Z_SYNC_FLUSH);
+  if (retcode == Z_NEED_DICT) {
+    if (decomp->adler == dictionary_id) {
+      retcode = inflateSetDictionary(decomp,
+                                     spdy_dictionary,
+                                     sizeof(spdy_dictionary));
+      if (retcode == Z_OK) {
+        retcode = inflate(decomp, Z_SYNC_FLUSH);
+      }
+    }
+  }
+
+  /* Handle errors. */
+  if (retcode != Z_OK) {
+    return NULL;
+  }
+
+  /* Handle successful inflation. */
+  *uncomp_length = bufsize - decomp->avail_out;
+
+  return (guint8 *)wmem_memdup(wmem_file_scope(), uncomp_block, *uncomp_length);
+}
+#endif
+
+
+/*
+ * Saves state on header data for a given stream.
+ */
+static spdy_header_info_t* spdy_save_header_block(packet_info *pinfo,
+                                                  guint32 stream_id,
+                                                  guint16 frame_type,
+                                                  guint8 *header,
+                                                  guint length) {
+  GSList *filist = (GSList *)p_get_proto_data(wmem_file_scope(), pinfo, proto_spdy, 0);
+  spdy_header_info_t *header_info = (spdy_header_info_t *)wmem_alloc(wmem_file_scope(), sizeof(spdy_header_info_t));
+  if (filist != NULL)
+    p_remove_proto_data(wmem_file_scope(), pinfo, proto_spdy, 0);
+  header_info->stream_id = stream_id;
+  header_info->header_block = header;
+  header_info->header_block_len = length;
+  header_info->frame_type = frame_type;
+  filist = g_slist_append(filist, header_info);
+  p_add_proto_data(wmem_file_scope(), pinfo, proto_spdy, 0, filist);
+  return header_info;
+  /* TODO(ers) these need to get deleted when no longer needed */
+}
+
+/*
+ * Retrieves saved state for a given stream.
+ */
+static spdy_header_info_t* spdy_find_saved_header_block(packet_info *pinfo,
+                                                        guint32 stream_id,
+                                                        guint16 frame_type) {
+  GSList *filist = (GSList *)p_get_proto_data(wmem_file_scope(), pinfo, proto_spdy, 0);
+  while (filist != NULL) {
+      spdy_header_info_t *hi = (spdy_header_info_t *)filist->data;
+      if (hi->stream_id == stream_id && hi->frame_type == frame_type)
+          return hi;
+      filist = g_slist_next(filist);
+  }
+  return NULL;
+}
+
+/*
+ * Given a content type string that may contain optional parameters,
+ * return the parameter string, if any, otherwise return NULL. This
+ * also has the side effect of null terminating the content type
+ * part of the original string.
+ */
+static gchar* spdy_parse_content_type(gchar *content_type) {
+  gchar *cp = content_type;
+
+  while (*cp != '\0' && *cp != ';' && !isspace(*cp)) {
+    *cp = tolower(*cp);
+    ++cp;
+  }
+  if (*cp == '\0') {
+    cp = NULL;
+  }
+
+  if (cp != NULL) {
+    *cp++ = '\0';
+    while (*cp == ';' || isspace(*cp)) {
+      ++cp;
+    }
+    if (*cp != '\0') {
+      return cp;
+    }
+  }
+  return NULL;
+}
+
+static int dissect_spdy_header_payload(
+  tvbuff_t *tvb,
+  int offset,
+  packet_info *pinfo,
+  proto_tree *frame_tree,
+  const spdy_control_frame_info_t *frame,
+  spdy_conv_t *conv_data) {
+  guint32 stream_id;
+  int header_block_length = frame->length;
+  int hdr_offset = 0;
+  tvbuff_t *header_tvb = NULL;
+  const gchar *hdr_method = NULL;
+  const gchar *hdr_path = NULL;
+  const gchar *hdr_version = NULL;
+  const gchar *hdr_host = NULL;
+  const gchar *hdr_scheme = NULL;
+  const gchar *hdr_status = NULL;
+  gchar *content_type = NULL;
+  gchar *content_encoding = NULL;
+  guint32 num_headers = 0;
+  proto_item *header_block_item;
+  proto_tree *header_block_tree;
+
+  /* Get stream id, which is present in all types of header frames. */
+  stream_id = tvb_get_ntohl(tvb, offset) & SPDY_STREAM_ID_MASK;
+  dissect_spdy_stream_id_field(tvb, offset, pinfo, frame_tree, hf_spdy_streamid);
+  offset += 4;
+
+  /* Get SYN_STREAM-only fields. */
+  if (frame->type == SPDY_SYN_STREAM) {
+    /* Get associated stream ID. */
+    dissect_spdy_stream_id_field(tvb, offset, pinfo, frame_tree, hf_spdy_associated_streamid);
+    offset += 4;
+
+    /* Get priority */
+    proto_tree_add_item(frame_tree, hf_spdy_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
+    offset += 2;
+  }
+
+
+  /* Get our header block length. */
+  switch (frame->type) {
+    case SPDY_SYN_STREAM:
+      header_block_length -= 10;
+      break;
+    case SPDY_SYN_REPLY:
+    case SPDY_HEADERS:
+      header_block_length -= 4;
+      break;
+    default:
+      /* Unhandled case. This should never happen. */
+      g_assert(FALSE);
+  }
+
+  /* Add the header block. */
+  header_block_item = proto_tree_add_item(frame_tree,
+                                            hf_spdy_header_block,
+                                            tvb,
+                                            offset,
+                                            header_block_length,
+                                            ENC_NA);
+  header_block_tree = proto_item_add_subtree(header_block_item,
+                                               ett_spdy_header_block);
+
+  /* Decompress header block as necessary. */
+  if (!spdy_decompress_headers) {
+    header_tvb = tvb;
+    hdr_offset = offset;
+  } else {
+    spdy_header_info_t *header_info;
+
+    /* First attempt to find previously decompressed data.
+     * This will not work correctly for lower-level frames that contain more
+     * than one SPDY frame of the same type. We assume this to never be the
+     * case, though. */
+    header_info = spdy_find_saved_header_block(pinfo,
+                                               stream_id,
+                                               frame->type);
+
+    /* Generate decompressed data and store it, since none was found. */
+    if (header_info == NULL) {
+      guint8 *uncomp_ptr = NULL;
+      guint uncomp_length = 0;
+#ifdef HAVE_LIBZ
+      z_streamp decomp;
+
+      /* Get our decompressor. */
+      if (stream_id % 2 == 0) {
+        /* Even streams are server-initiated and should never get a
+         * client-initiated header block. Use reply decompressor. */
+        decomp = conv_data->rply_decompressor;
+      } else if (frame->type == SPDY_HEADERS) {
+        /* Odd streams are client-initiated, but may have HEADERS from either
+         * side. Currently, no known clients send HEADERS so we assume they are
+         * all from the server. */
+        decomp = conv_data->rply_decompressor;
+      } else if (frame->type == SPDY_SYN_STREAM) {
+        decomp = conv_data->rqst_decompressor;
+      } else if (frame->type == SPDY_SYN_REPLY) {
+        decomp = conv_data->rply_decompressor;
+      } else {
+        /* Unhandled case. This should never happen. */
+        g_assert(FALSE);
+      }
+
+      /* Decompress. */
+      uncomp_ptr = spdy_decompress_header_block(tvb,
+                                                decomp,
+                                                conv_data->dictionary_id,
+                                                offset,
+                                                header_block_length,
+                                                &uncomp_length);
+
+      /* Catch decompression failures. */
+      if (uncomp_ptr == NULL) {
+        expert_add_info(pinfo, frame_tree, &ei_spdy_inflation_failed);
+
+        proto_item_append_text(frame_tree, " [Error: Header decompression failed]");
+        return -1;
+      }
+#endif
+
+      /* Store decompressed data. */
+      header_info = spdy_save_header_block(pinfo, stream_id, frame->type, uncomp_ptr, uncomp_length);
+    }
+
+    /* Create a tvb containing the uncompressed data. */
+    header_tvb = tvb_new_child_real_data(tvb, header_info->header_block,
+                                         header_info->header_block_len,
+                                         header_info->header_block_len);
+    add_new_data_source(pinfo, header_tvb, "Uncompressed headers");
+    hdr_offset = 0;
+  }
+
+  /* Get header block details. */
+  if (header_tvb == NULL || !spdy_decompress_headers) {
+    num_headers = 0;
+  } else {
+    num_headers = tvb_get_ntohl(header_tvb, hdr_offset);
+    /*ti = */ proto_tree_add_item(header_block_tree,
+                             hf_spdy_num_headers,
+                             header_tvb,
+                             hdr_offset,
+                             4,
+                             ENC_BIG_ENDIAN);
+  }
+  hdr_offset += 4;
+
+  /* Process headers. */
+  while (num_headers--) {
+    gchar *header_name;
+    const gchar *header_value;
+    proto_tree *header_tree;
+    proto_item *header;
+    int header_name_offset;
+    int header_value_offset;
+    int header_name_length;
+    int header_value_length;
+
+    /* Get header name details. */
+    if (tvb_length_remaining(header_tvb, hdr_offset) < 4) {
+      expert_add_info_format(pinfo, frame_tree, &ei_spdy_mal_frame_data,
+                             "Not enough frame data for header name size.");
+      break;
+    }
+    header_name_offset = hdr_offset;
+    header_name_length = tvb_get_ntohl(header_tvb, hdr_offset);
+    hdr_offset += 4;
+    if (tvb_length_remaining(header_tvb, hdr_offset) < header_name_length) {
+      expert_add_info_format(pinfo, frame_tree, &ei_spdy_mal_frame_data,
+                             "Not enough frame data for header name.");
+      break;
+    }
+    header_name = (gchar *)tvb_get_string(wmem_packet_scope(), header_tvb,
+                                                    hdr_offset,
+                                                    header_name_length);
+    hdr_offset += header_name_length;
+
+    /* Get header value details. */
+    if (tvb_length_remaining(header_tvb, hdr_offset) < 4) {
+      expert_add_info_format(pinfo, frame_tree, &ei_spdy_mal_frame_data,
+                             "Not enough frame data for header value size.");
+      break;
+    }
+    header_value_offset = hdr_offset;
+    header_value_length = tvb_get_ntohl(header_tvb, hdr_offset);
+    hdr_offset += 4;
+    if (tvb_length_remaining(header_tvb, hdr_offset) < header_value_length) {
+      expert_add_info_format(pinfo, frame_tree, &ei_spdy_mal_frame_data,
+                             "Not enough frame data for header value.");
+      break;
+    }
+    header_value = (gchar *)tvb_get_string(wmem_packet_scope(),header_tvb,
+                                                     hdr_offset,
+                                                     header_value_length);
+    hdr_offset += header_value_length;
+
+    /* Populate tree with header name/value details. */
+    if (frame_tree) {
+      /* Add 'Header' subtree with description. */
+      header = proto_tree_add_item(frame_tree,
+                                   hf_spdy_header,
+                                   header_tvb,
+                                   header_name_offset,
+                                   hdr_offset - header_name_offset,
+                                   ENC_NA);
+      proto_item_append_text(header, ": %s: %s", header_name, header_value);
+      header_tree = proto_item_add_subtree(header, ett_spdy_header);
+
+      /* Add header name. */
+      /*header_name_ti = */proto_tree_add_item(header_tree,
+                                           hf_spdy_header_name,
+                                           header_tvb,
+                                           header_name_offset,
+                                           4,
+                                           ENC_NA);
+
+      /* Add header value. */
+      /*header_value_ti =*/ proto_tree_add_item(header_tree,
+                                            hf_spdy_header_value,
+                                            header_tvb,
+                                            header_value_offset,
+                                            4,
+                                            ENC_NA);
+    }
+
+    /*
+     * TODO(ers) check that the header name contains only legal characters.
+     */
+    /* TODO(hkhalil): Make sure that prohibited headers aren't sent. */
+    if (g_strcmp0(header_name, ":method") == 0) {
+      hdr_method = header_value;
+    } else if (g_strcmp0(header_name, ":path") == 0) {
+      hdr_path = header_value;
+    } else if (g_strcmp0(header_name, ":version") == 0) {
+      hdr_version = header_value;
+    } else if (g_strcmp0(header_name, ":host") == 0) {
+      hdr_host = header_value;
+    } else if (g_strcmp0(header_name, ":scheme") == 0) {
+      hdr_scheme = header_value;
+    } else if (g_strcmp0(header_name, ":status") == 0) {
+      hdr_status = header_value;
+    } else if (g_strcmp0(header_name, "content-type") == 0) {
+      content_type = wmem_strdup(wmem_file_scope(), header_value);
+    } else if (g_strcmp0(header_name, "content-encoding") == 0) {
+      content_encoding = wmem_strdup(wmem_file_scope(), header_value);
+    }
+  }
+
+  /* Set Info column. */
+  if (hdr_version != NULL) {
+    if (hdr_status == NULL) {
+      col_append_fstr(pinfo->cinfo, COL_INFO, " Request=\"%s %s://%s%s %s\"",
+                      hdr_method, hdr_scheme, hdr_host, hdr_path, hdr_version);
+    } else {
+      col_append_fstr(pinfo->cinfo, COL_INFO, " Response=\"%s %s\"",
+                      hdr_status, hdr_version);
+    }
+  }
+
+  /*
+   * If we expect data on this stream, we need to remember the content
+   * type and content encoding.
+   */
+  if (content_type != NULL && !pinfo->fd->flags.visited) {
+    gchar *content_type_params = spdy_parse_content_type(content_type);
+    spdy_save_stream_info(conv_data, stream_id, content_type,
+                          content_type_params, content_encoding);
+  }
+
+  return frame->length;
+}
+
+static int dissect_spdy_rst_stream_payload(
+  tvbuff_t *tvb,
+  int offset,
+  packet_info *pinfo,
+  proto_tree *frame_tree,
+  const spdy_control_frame_info_t *frame) {
+  guint32 rst_status;
+  proto_item *ti;
+  const char* str;
+
+  /* Get stream ID and add to info column and tree. */
+  dissect_spdy_stream_id_field(tvb, offset, pinfo, frame_tree, hf_spdy_streamid);
+  offset += 4;
+
+  /* Get status. */
+
+  ti = proto_tree_add_item(frame_tree, hf_spdy_rst_stream_status, tvb, offset, 4, ENC_BIG_ENDIAN);
+  rst_status = tvb_get_ntohl(tvb, offset);
+  if (try_val_to_str(rst_status, rst_stream_status_names) == NULL) {
+    /* Handle boundary conditions. */
+    expert_add_info_format(pinfo, ti, &ei_spdy_invalid_rst_stream,
+                           "Invalid status code for RST_STREAM: %u", rst_status);
+  }
+
+  str = val_to_str(rst_status, rst_stream_status_names, "Unknown (%d)");
+  /* Add status to info column. */
+  col_append_fstr(pinfo->cinfo, COL_INFO, " Status=%s)", str);
+
+  proto_item_append_text(frame_tree, ", Status: %s", str);
+
+  return frame->length;
+}
+
+static int dissect_spdy_settings_payload(
+  tvbuff_t *tvb,
+  int offset,
+  packet_info *pinfo,
+  proto_tree *frame_tree,
+  const spdy_control_frame_info_t *frame) {
+  guint32 num_entries;
+  proto_item *ti;
+  proto_tree *setting_tree;
+  proto_tree *flags_tree;
+
+  /* Get number of entries, and make sure we have enough room for them. */
+  num_entries = tvb_get_ntohl(tvb, offset);
+  proto_tree_add_item(frame_tree, hf_spdy_num_settings, tvb, offset, 4, ENC_BIG_ENDIAN);
+  offset += 4;
+
+  /* Dissect each entry. */
+  while (num_entries > 0) {
+    const gchar *setting_id_str;
+    guint32 setting_value;
+
+    /* Create key/value pair subtree. */
+    ti = proto_tree_add_item(frame_tree, hf_spdy_setting, tvb, offset, 8, ENC_NA);
+    setting_tree = proto_item_add_subtree(ti, ett_spdy_setting);
+
+    /* Set flags. */
+    if (setting_tree) {
+      ti = proto_tree_add_item(setting_tree, hf_spdy_flags, tvb, offset, 1, ENC_NA);
+
+      /* TODO(hkhalil): Prettier output for flags sub-tree description. */
+      flags_tree = proto_item_add_subtree(ti, ett_spdy_flags);
+      proto_tree_add_item(flags_tree, hf_spdy_flags_persist_value, tvb, offset, 1, ENC_BIG_ENDIAN);
+      proto_tree_add_item(flags_tree, hf_spdy_flags_persisted, tvb, offset, 1, ENC_BIG_ENDIAN);
+    }
+    offset += 1;
+
+    /* Set ID. */
+    setting_id_str = val_to_str(tvb_get_ntoh24(tvb, offset), setting_id_names, "Unknown(%d)");
+
+    proto_tree_add_item(setting_tree, hf_spdy_setting_id, tvb, offset, 3, ENC_BIG_ENDIAN);
+    offset += 3;
+
+    /* Set Value. */
+    setting_value = tvb_get_ntohl(tvb, offset);
+
+    proto_tree_add_item(setting_tree, hf_spdy_setting_value, tvb, offset, 4, ENC_BIG_ENDIAN);
+    proto_item_set_text(setting_tree, "Setting, %s: %u", setting_id_str, setting_value);
+    proto_item_append_text(frame_tree, ", %s: %u", setting_id_str, setting_value);
+    offset += 4;
+
+    /* Append to info column. */
+    col_append_fstr(pinfo->cinfo, COL_INFO, " %s=%u", setting_id_str, setting_value);
+
+    /* Increment. */
+    --num_entries;
+  }
+
+  return frame->length;
+}
+
+static int dissect_spdy_ping_payload(tvbuff_t *tvb, int offset, packet_info *pinfo,
+                                     proto_tree *frame_tree, const spdy_control_frame_info_t *frame)
+{
+  /* Get ping ID. */
+  guint32 ping_id = tvb_get_ntohl(tvb, offset);
+
+  /* Add proto item for ping ID. */
+  proto_tree_add_item(frame_tree, hf_spdy_ping_id, tvb, offset, 4, ENC_BIG_ENDIAN);
+  proto_item_append_text(frame_tree, ", ID: %u", ping_id);
+  offset += 4;
+
+  /* Add ping ID to info column. */
+  col_append_fstr(pinfo->cinfo, COL_INFO, " ID=%u", ping_id);
+
+  return frame->length;
+}
+
+static int dissect_spdy_goaway_payload(tvbuff_t *tvb,
+                                       int offset,
+                                       packet_info *pinfo,
+                                       proto_tree *frame_tree,
+                                       const spdy_control_frame_info_t *frame) {
+  guint32 goaway_status;
+  proto_item* ti;
+
+  /* Get last good stream ID and add to info column and tree. */
+  dissect_spdy_stream_id_field(tvb, offset, pinfo, frame_tree, hf_spdy_goaway_last_good_stream_id);
+  offset += 4;
+
+  /* Add proto item for goaway_status. */
+  ti = proto_tree_add_item(frame_tree, hf_spdy_goaway_status, tvb, offset, 4, ENC_BIG_ENDIAN);
+  goaway_status = tvb_get_ntohl(tvb, offset);
+
+  if (try_val_to_str(goaway_status, goaway_status_names) == NULL) {
+    /* Handle boundary conditions. */
+    expert_add_info_format(pinfo, ti, &ei_spdy_invalid_go_away,
+                           "Invalid status code for GOAWAY: %u", goaway_status);
+  }
+
+  /* Add status to info column. */
+  col_append_fstr(pinfo->cinfo, COL_INFO, " Status=%s)",
+                  val_to_str(goaway_status, rst_stream_status_names, "Unknown (%d)"));
+
+  return frame->length;
+}
+
+static int dissect_spdy_window_update_payload(
+    tvbuff_t *tvb,
+    int offset,
+    packet_info *pinfo,
+    proto_tree *frame_tree,
+    const spdy_control_frame_info_t *frame)
+{
+  guint32             window_update_delta;
+
+  /* Get stream ID. */
+  dissect_spdy_stream_id_field(tvb, offset, pinfo, frame_tree, hf_spdy_streamid);
+  offset += 4;
+
+  /* Get window update delta. */
+  window_update_delta = tvb_get_ntohl(tvb, offset) & 0x7FFFFFFF;
+
+  /* Add proto item for window update delta. */
+  proto_tree_add_item(frame_tree, hf_spdy_window_update_delta, tvb, offset, 4, ENC_BIG_ENDIAN);
+  proto_item_append_text(frame_tree, ", Delta: %u", window_update_delta);
+  offset += 4;
+
+  /* Add delta to info column. */
+  col_append_fstr(pinfo->cinfo, COL_INFO, " Delta=%u", window_update_delta);
+
+  return frame->length;
+}
+
+/*
+ * Performs SPDY frame dissection.
+ */
+int dissect_spdy_frame(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
+{
+  guint8              control_bit;
+  spdy_control_frame_info_t frame;
+  guint32             stream_id = 0;
+  const gchar         *frame_type_name;
+  proto_tree          *spdy_tree;
+  proto_item          *spdy_item, *type_item = NULL;
+  int                 offset = 0;
+  spdy_conv_t         *conv_data;
+
+  conv_data = get_or_create_spdy_conversation_data(pinfo);
+
+  col_set_str(pinfo->cinfo, COL_PROTOCOL, "SPDY");
+
+  /* Create frame root. */
+  spdy_item = proto_tree_add_item(tree, proto_spdy, tvb, offset, -1, ENC_NA);
+  spdy_tree = proto_item_add_subtree(spdy_item, ett_spdy);
+
+  /* Add control bit. */
+  control_bit = tvb_get_guint8(tvb, offset) & 1;
+  proto_tree_add_item(spdy_tree, hf_spdy_control_bit, tvb, offset, 1, ENC_NA);
+
+  /* Process first four bytes of frame, formatted depending on control bit. */
+  if (control_bit) {
+    /* Add version. */
+    frame.version = tvb_get_ntohs(tvb, offset) & 0x7FFF;
+    proto_tree_add_item(spdy_tree, hf_spdy_version, tvb, offset, 2, ENC_BIG_ENDIAN);
+    offset += 2;
+
+    /* Add control frame type. */
+    type_item = proto_tree_add_item(spdy_tree, hf_spdy_type, tvb, offset, 2, ENC_BIG_ENDIAN);
+    frame.type = tvb_get_ntohs(tvb, offset);
+    if (frame.type >= SPDY_INVALID) {
+      expert_add_info_format(pinfo, type_item, &ei_spdy_invalid_frame_type,
+                             "Invalid SPDY control frame type: %d", frame.type);
+      return -1;
+    }
+    offset += 2;
+
+  } else {
+    frame.type = SPDY_DATA;
+    frame.version = 0; /* Version doesn't apply to DATA. */
+
+    /* Add stream ID. */
+    stream_id = tvb_get_ntohl(tvb, offset) & SPDY_STREAM_ID_MASK;
+    proto_tree_add_item(spdy_tree, hf_spdy_streamid, tvb, offset, 4, ENC_BIG_ENDIAN);
+    offset += 4;
+  }
+
+  /* Add frame info. */
+  frame_type_name = val_to_str(frame.type, frame_type_names, "Unknown(%d)");
+  col_add_str(pinfo->cinfo, COL_INFO, frame_type_name);
+
+  proto_item_append_text(spdy_tree, ", %s", frame_type_name);
+
+  /* Add flags. */
+  frame.flags = tvb_get_guint8(tvb, offset);
+  if (spdy_tree) {
+    dissect_spdy_flags(tvb, offset, spdy_tree, &frame);
+  }
+  offset += 1;
+
+  /* Add length. */
+  frame.length = tvb_get_ntoh24(tvb, offset);
+
+  proto_item_set_len(spdy_item, frame.length + 8);
+  proto_tree_add_item(spdy_tree, hf_spdy_length, tvb, offset, 3, ENC_BIG_ENDIAN);
+  offset += 3;
+
+  /*
+   * Make sure there's as much data as the frame header says there is.
+   */
+  if ((guint)tvb_length_remaining(tvb, offset) < frame.length) {
+    expert_add_info_format(pinfo, tree, &ei_spdy_mal_frame_data,
+                           "Not enough frame data: %d vs. %d",
+                           frame.length, tvb_length_remaining(tvb, offset));
+    return -1;
+  }
+
+  /* Dissect DATA payload as necessary. */
+  if (!control_bit) {
+    return offset + dissect_spdy_data_payload(tvb, offset, pinfo, tree, spdy_tree,
+                                              spdy_item, conv_data, stream_id, &frame);
+  }
+
+  /* Abort here if the version is too low. */
+  if (frame.version < MIN_SPDY_VERSION) {
+    proto_item_append_text(spdy_item, " [Unsupported Version]");
+    return frame.length + 8;
+  }
+
+  switch (frame.type) {
+    case SPDY_SYN_STREAM:
+    case SPDY_SYN_REPLY:
+    case SPDY_HEADERS:
+      dissect_spdy_header_payload(tvb, offset, pinfo, spdy_tree, &frame, conv_data);
+      break;
+
+    case SPDY_RST_STREAM:
+      dissect_spdy_rst_stream_payload(tvb, offset, pinfo, spdy_tree, &frame);
+      break;
+
+    case SPDY_SETTINGS:
+      dissect_spdy_settings_payload(tvb, offset, pinfo, spdy_tree, &frame);
+      break;
+
+    case SPDY_PING:
+      dissect_spdy_ping_payload(tvb, offset, pinfo, spdy_tree, &frame);
+      break;
+
+    case SPDY_GOAWAY:
+      dissect_spdy_goaway_payload(tvb, offset, pinfo, spdy_tree, &frame);
+      break;
+
+    case SPDY_WINDOW_UPDATE:
+      dissect_spdy_window_update_payload(tvb, offset, pinfo, spdy_tree, &frame);
+      break;
+
+    case SPDY_CREDENTIAL:
+      /* TODO(hkhalil): Show something meaningful. */
+      break;
+
+    default:
+      expert_add_info_format(pinfo, type_item, &ei_spdy_invalid_frame_type,
+                             "Unhandled SPDY frame type: %d", frame.type);
+      break;
+  }
+
+  /*
+   * OK, we've set the Protocol and Info columns for the
+   * first SPDY message; set a fence so that subsequent
+   * SPDY messages don't overwrite the Info column.
+   */
+  col_set_fence(pinfo->cinfo, COL_INFO);
+
+  /* Assume that we've consumed the whole frame. */
+  return 8 + frame.length;
+}
+
+static guint get_spdy_message_len(packet_info *pinfo _U_, tvbuff_t *tvb,
+                                  int offset)
+{
+  return (guint)tvb_get_ntoh24(tvb, offset + 5) + 8;
+}
+
+/*
+ * Wrapper for dissect_spdy_frame, sets fencing and desegments as necessary.
+ */
+static int dissect_spdy(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
+{
+   tcp_dissect_pdus(tvb, pinfo, tree, TRUE, 8, get_spdy_message_len, dissect_spdy_frame, data);
+   return tvb_captured_length(tvb);
+}
+
+#if 0 /* heuristic too weak */
+/*
+ * Looks for SPDY frame at tvb start.
+ * If not enough data for either, requests more via desegment struct.
+ */
+gboolean dissect_spdy_heur(tvbuff_t *tvb,
+                                  packet_info *pinfo,
+                                  proto_tree *tree,
+                                   void *data _U_)
+{
+  /*
+   * The first byte of a SPDY frame must be either 0 or
+   * 0x80. If it's not, assume that this is not SPDY.
+   * (In theory, a data frame could have a stream ID
+   * >= 2^24, in which case it won't have 0 for a first
+   * byte, but this is a pretty reliable heuristic for
+   * now.)
+   */
+  guint8 first_byte = tvb_get_guint8(tvb, 0);
+  if (first_byte != 0x80 && first_byte != 0x0) {
+    return FALSE;
+  }
+
+  /* Attempt dissection. */
+  if (dissect_spdy(tvb, pinfo, tree, NULL) != 0) {
+    return TRUE;
+  }
+
+  return FALSE;
+}
+#endif
+
+/*
+ * Performs plugin registration.
+ */
+void proto_register_spdy(void)
+{
+  static hf_register_info hf[] = {
+    { &hf_spdy_data,
+      { "Data",           "spdy.data",
+        FT_BYTES, BASE_NONE, NULL, 0x0,
+        NULL, HFILL
+      }
+    },
+    { &hf_spdy_control_bit,
+      { "Control frame",    "spdy.control_bit",
+        FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x8000,
+        "TRUE if SPDY control frame", HFILL
+      }
+    },
+    { &hf_spdy_version,
+      { "Version",        "spdy.version",
+        FT_UINT16, BASE_DEC, NULL, 0x7FFF,
+        NULL, HFILL
+      }
+    },
+    { &hf_spdy_type,
+      { "Type",           "spdy.type",
+        FT_UINT16, BASE_DEC,
+        VALS(frame_type_names), 0x0,
+        NULL, HFILL
+      }
+    },
+    { &hf_spdy_flags,
+      { "Flags",          "spdy.flags",
+        FT_UINT8, BASE_HEX, NULL, 0x0,
+        NULL, HFILL
+      }
+    },
+    { &hf_spdy_flags_fin,
+      { "FIN",            "spdy.flags.fin",
+        FT_BOOLEAN, 8,
+        TFS(&tfs_set_notset), SPDY_FLAG_FIN,
+        NULL, HFILL
+      }
+    },
+    { &hf_spdy_flags_unidirectional,
+      { "Unidirectional", "spdy.flags.fin",
+        FT_BOOLEAN, 8,
+        TFS(&tfs_set_notset), SPDY_FLAG_UNIDIRECTIONAL,
+        NULL, HFILL
+      }
+    },
+    { &hf_spdy_flags_clear_settings,
+      { "Persist Value",  "spdy.flags.clear_settings",
+        FT_BOOLEAN, 8,
+        TFS(&tfs_set_notset), SPDY_FLAG_SETTINGS_CLEAR_SETTINGS,
+        NULL, HFILL
+      }
+    },
+    { &hf_spdy_flags_persist_value,
+      { "Persist Value",  "spdy.flags.persist_value",
+        FT_BOOLEAN, 8,
+        TFS(&tfs_set_notset), SPDY_FLAG_SETTINGS_PERSIST_VALUE,
+        NULL, HFILL
+      }
+    },
+    { &hf_spdy_flags_persisted,
+      { "Persisted",      "spdy.flags.persisted",
+        FT_BOOLEAN, 8,
+        TFS(&tfs_set_notset), SPDY_FLAG_SETTINGS_PERSISTED,
+        NULL, HFILL
+      }
+    },
+    { &hf_spdy_length,
+      { "Length",         "spdy.length",
+        FT_UINT24, BASE_DEC, NULL, 0x0,
+        NULL, HFILL
+      }
+    },
+    { &hf_spdy_header_block,
+      { "Header block", "spdy.header_block",
+          FT_BYTES, BASE_NONE, NULL, 0x0,
+          NULL, HFILL
+      }
+    },
+    { &hf_spdy_header,
+      { "Header",         "spdy.header",
+        FT_NONE, BASE_NONE, NULL, 0x0,
+        NULL, HFILL
+      }
+    },
+    { &hf_spdy_header_name,
+      { "Name",           "spdy.header.name",
+          FT_UINT_STRING, BASE_NONE, NULL, 0x0,
+          NULL, HFILL
+      }
+    },
+    { &hf_spdy_header_value,
+      { "Value",          "spdy.header.value",
+          FT_UINT_STRING, BASE_NONE, NULL, 0x0,
+          NULL, HFILL
+      }
+    },
+    { &hf_spdy_streamid,
+      { "Stream ID",      "spdy.streamid",
+          FT_UINT32, BASE_DEC, NULL, SPDY_STREAM_ID_MASK,
+          NULL, HFILL
+      }
+    },
+    { &hf_spdy_associated_streamid,
+      { "Associated Stream ID",   "spdy.associated.streamid",
+          FT_UINT32, BASE_DEC, NULL, SPDY_STREAM_ID_MASK,
+          NULL, HFILL
+      }
+    },
+    { &hf_spdy_priority,
+      { "Priority",       "spdy.priority",
+          FT_UINT8, BASE_DEC, NULL, 0x07,
+          NULL, HFILL
+      }
+    },
+    { &hf_spdy_num_headers,
+      { "Number of headers", "spdy.numheaders",
+          FT_UINT32, BASE_DEC, NULL, 0x0,
+          NULL, HFILL
+      }
+    },
+    { &hf_spdy_rst_stream_status,
+      { "Reset Status",   "spdy.rst_stream_status",
+          FT_UINT32, BASE_DEC, VALS(rst_stream_status_names), 0x0,
+          NULL, HFILL
+      }
+    },
+    { &hf_spdy_num_settings,
+      { "Number of Settings", "spdy.num_settings",
+          FT_UINT32, BASE_DEC, NULL, 0x0,
+          NULL, HFILL
+      }
+    },
+    { &hf_spdy_setting,
+      { "Setting",        "spdy.setting",
+          FT_BYTES, BASE_NONE, NULL, 0x0,
+          NULL, HFILL
+      }
+    },
+    { &hf_spdy_setting_id,
+      { "ID",             "spdy.setting.id",
+          FT_UINT24, BASE_DEC, VALS(setting_id_names), 0x0,
+          NULL, HFILL
+      }
+    },
+    { &hf_spdy_setting_value,
+      { "Value",          "spdy.setting.value",
+          FT_UINT32, BASE_DEC, NULL, 0x0,
+          NULL, HFILL
+      }
+    },
+    { &hf_spdy_ping_id,
+      { "Ping ID",        "spdy.ping_id",
+          FT_UINT24, BASE_DEC, NULL, 0x0,
+          NULL, HFILL
+      }
+    },
+    { &hf_spdy_goaway_last_good_stream_id,
+      { "Last Good Stream ID", "spdy.goaway_last_good_stream_id",
+          FT_UINT32, BASE_DEC, NULL, SPDY_STREAM_ID_MASK,
+          NULL, HFILL
+      }
+    },
+    { &hf_spdy_goaway_status,
+      { "Go Away Status", "spdy.goaway_status",
+          FT_UINT32, BASE_DEC, VALS(goaway_status_names), 0x0,
+          NULL, HFILL
+      }
+    },
+    { &hf_spdy_window_update_delta,
+      { "Window Update Delta", "spdy.window_update_delta",
+          FT_UINT32, BASE_DEC, NULL, 0x7FFFFFFF,
+          NULL, HFILL
+      }
+    },
+  };
+  static gint *ett[] = {
+    &ett_spdy,
+    &ett_spdy_flags,
+    &ett_spdy_header_block,
+    &ett_spdy_header,
+    &ett_spdy_setting,
+    &ett_spdy_encoded_entity,
+  };
+
+  static ei_register_info ei[] = {
+    { &ei_spdy_inflation_failed, { "spdy.inflation_failed", PI_UNDECODED, PI_ERROR, "Inflation failed. Aborting.", EXPFILL }},
+    { &ei_spdy_mal_frame_data, { "spdy.malformed.frame_data", PI_MALFORMED, PI_ERROR, "Not enough frame data", EXPFILL }},
+    { &ei_spdy_mal_setting_frame, { "spdy.malformed.setting_frame", PI_MALFORMED, PI_ERROR, "SETTINGS frame too small for number of entries field.", EXPFILL }},
+    { &ei_spdy_invalid_rst_stream, { "spdy.rst_stream.invalid", PI_PROTOCOL, PI_WARN, "Invalid status code for RST_STREAM", EXPFILL }},
+    { &ei_spdy_invalid_go_away, { "spdy.goaway.invalid", PI_PROTOCOL, PI_WARN, "Invalid status code for GOAWAY", EXPFILL }},
+    { &ei_spdy_invalid_frame_type, { "spdy.type.invalid", PI_PROTOCOL, PI_WARN, "Invalid SPDY frame type", EXPFILL }},
+  };
+
+  module_t *spdy_module;
+  expert_module_t* expert_spdy;
+
+  proto_spdy = proto_register_protocol("SPDY", "SPDY", "spdy");
+  proto_register_field_array(proto_spdy, hf, array_length(hf));
+  proto_register_subtree_array(ett, array_length(ett));
+  expert_spdy = expert_register_protocol(proto_spdy);
+  expert_register_field_array(expert_spdy, ei, array_length(ei));
+
+  new_register_dissector("spdy", dissect_spdy, proto_spdy);
+
+  spdy_module = prefs_register_protocol(proto_spdy, NULL);
+  prefs_register_bool_preference(spdy_module, "assemble_data_frames",
+                                 "Assemble SPDY bodies that consist of multiple DATA frames",
+                                 "Whether the SPDY dissector should reassemble multiple "
+                                 "data frames into an entity body.",
+                                 &spdy_assemble_entity_bodies);
+
+  prefs_register_bool_preference(spdy_module, "decompress_headers",
+                                 "Uncompress SPDY headers",
+                                 "Whether to uncompress SPDY headers.",
+                                 &spdy_decompress_headers);
+  prefs_register_bool_preference(spdy_module, "decompress_body",
+                                 "Uncompress entity bodies",
+                                 "Whether to uncompress entity bodies that are compressed "
+                                 "using \"Content-Encoding: \"",
+                                 &spdy_decompress_body);
+
+  /** Create dissector handle and register for dissection. */
+  spdy_handle = new_create_dissector_handle(dissect_spdy, proto_spdy);
+
+  /*
+   * Register for tapping
+   */
+  spdy_tap = register_tap("spdy"); /* SPDY statistics tap */
+  spdy_eo_tap = register_tap("spdy_eo"); /* SPDY Export Object tap */
+}
+
+void proto_reg_handoff_spdy(void) {
+
+  dissector_add_uint("tcp.port", TCP_PORT_SPDY, spdy_handle);
+  ssl_dissector_add(SSL_PORT_SPDY, "spdy", TRUE);
+
+  data_handle = find_dissector("data");
+  media_handle = find_dissector("media");
+  port_subdissector_table = find_dissector_table("http.port");
+  media_type_subdissector_table = find_dissector_table("media_type");
+
+#if 0 /* heuristic too weak */
+  heur_dissector_add("tcp", dissect_spdy_heur, proto_spdy);
+#endif
+}
+
+/*
+ * Editor modelines
+ *
+ * Local Variables:
+ * c-basic-offset: 2
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * ex: set shiftwidth=2 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */