fb-zero: Add support of Zero Protocol

Facebook uses a derivative of QUIC protocol (on top of TCP) for Android device
The dissector was reverse engineered based off of QUIC dissector functionality

Pcap avaliable https://github.com/ntop/nDPI/issues/300
Some information (not spec) can be found here:
https://code.facebook.com/posts/608854979307125/building-zero-protocol-for-fast-secure-mobile-connections/

Change-Id: I4026bb992aa17a0c679379646b388a694f24a07f
Reviewed-on: https://code.wireshark.org/review/18937
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>

4 files changed, 615 insertions, 0 deletions

diff --git a/docbook/release-notes.asciidoc b/docbook/release-notes.asciidoc
index bcf546852d..4978191ee0 100644
--- a/docbook/release-notes.asciidoc
+++ b/docbook/release-notes.asciidoc
@@ -99,6 +99,7 @@ DirectPlay 8 protocol
 NM protocol
 Netgear Ensemble Protocol
 OBD-II PIDs
+(Facebook) Zero
 --sort-and-group--
 
 === Updated Protocol Support
diff --git a/epan/dissectors/CMakeLists.txt b/epan/dissectors/CMakeLists.txt
index 7829b1c3b8..203ee4bb7c 100644
--- a/epan/dissectors/CMakeLists.txt
+++ b/epan/dissectors/CMakeLists.txt
@@ -573,6 +573,7 @@ set(DISSECTOR_SRC
 	packet-fcsb3.c
 	packet-fcsp.c
 	packet-fcswils.c
+	packet-fbzero.c
 	packet-fddi.c
 	packet-fefd.c
 	packet-ff.c
diff --git a/epan/dissectors/Makefile.am b/epan/dissectors/Makefile.am
index ad9f8401a6..4c1338618c 100644
--- a/epan/dissectors/Makefile.am
+++ b/epan/dissectors/Makefile.am
@@ -595,6 +595,7 @@ DISSECTOR_SRC = \
 	packet-fcsb3.c		\
 	packet-fcsp.c		\
 	packet-fcswils.c	\
+	packet-fbzero.c		\
 	packet-fddi.c		\
 	packet-fefd.c		\
 	packet-ff.c		\
diff --git a/epan/dissectors/packet-fbzero.c b/epan/dissectors/packet-fbzero.c
new file mode 100644
index 0000000000..ecc6b86846
--- /dev/null
+++ b/epan/dissectors/packet-fbzero.c
@@ -0,0 +1,612 @@
+/* packet-fbzero.c
+ * Routines for Zero Protocol dissection
+ * Copyright 2016-2017, Alexis La Goutte <alexis.lagoutte at gmail dot com>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/*
+Zero Protocol coming from Facebook and used the same framing like QUIC (tag-map value) but based on TCP
+It was reverse engineered based off of QUIC dissector functionality
+*/
+#include "config.h"
+
+#include <epan/packet.h>
+#include <epan/prefs.h>
+#include <epan/expert.h>
+#include <epan/conversation.h>
+
+void proto_register_fb_zero(void);
+void proto_reg_handoff_fb_zero(void);
+
+static int proto_fb_zero = -1;
+
+static dissector_handle_t fb_zero_handle;
+
+static int hf_fb_zero_puflags = -1;
+static int hf_fb_zero_puflags_vrsn = -1;
+static int hf_fb_zero_puflags_unknown = -1;
+static int hf_fb_zero_version = -1;
+static int hf_fb_zero_length = -1;
+static int hf_fb_zero_tag = -1;
+static int hf_fb_zero_tags = -1;
+static int hf_fb_zero_tag_number = -1;
+static int hf_fb_zero_tag_value = -1;
+static int hf_fb_zero_tag_type = -1;
+static int hf_fb_zero_tag_offset_end = -1;
+static int hf_fb_zero_tag_length = -1;
+static int hf_fb_zero_tag_sni = -1;
+static int hf_fb_zero_tag_vers = -1;
+static int hf_fb_zero_tag_sno = -1;
+static int hf_fb_zero_tag_aead = -1;
+static int hf_fb_zero_tag_scid = -1;
+static int hf_fb_zero_tag_time = -1;
+static int hf_fb_zero_tag_alpn = -1;
+static int hf_fb_zero_tag_pubs = -1;
+static int hf_fb_zero_tag_kexs = -1;
+static int hf_fb_zero_tag_nonc = -1;
+
+static int hf_fb_zero_tag_unknown = -1;
+
+static int hf_fb_zero_padding = -1;
+static int hf_fb_zero_payload = -1;
+static int hf_fb_zero_unknown = -1;
+
+static gint ett_fb_zero = -1;
+static gint ett_fb_zero_puflags = -1;
+static gint ett_fb_zero_prflags = -1;
+static gint ett_fb_zero_ft = -1;
+static gint ett_fb_zero_ftflags = -1;
+static gint ett_fb_zero_tag_value = -1;
+
+static expert_field ei_fb_zero_tag_undecoded = EI_INIT;
+static expert_field ei_fb_zero_tag_length = EI_INIT;
+static expert_field ei_fb_zero_tag_unknown = EI_INIT;
+
+#define FBZERO_MIN_LENGTH 3
+
+#define VERSION_QTV 0x515456
+
+/**************************************************************************/
+/*                      Public Flags                                      */
+/**************************************************************************/
+#define PUFLAGS_VRSN    0x01
+#define PUFLAGS_UNKN    0xFE
+
+/**************************************************************************/
+/*                      Message tag                                       */
+/**************************************************************************/
+
+#define MTAG_CHLO 0x43484C4F
+#define MTAG_SNOM 0x534E4F4D
+#define MTAG_SHLO 0x53484C4F
+#define MTAG_REJ  0x52454A00
+#define MTAG_PRST 0x50525354
+
+static const value_string message_tag_vals[] = {
+    { MTAG_CHLO, "Client Hello" },
+    { MTAG_SNOM, "Server NOM??" },
+    { MTAG_SHLO, "Server Hello" },
+    { MTAG_REJ, "Rejection" },
+    { MTAG_PRST, "Public Reset" },
+    { 0, NULL }
+};
+
+/**************************************************************************/
+/*                      Tag                                               */
+/**************************************************************************/
+
+#define TAG_SNI  0x534E4900
+#define TAG_VERS 0x56455253
+#define TAG_SNO  0x534E4F00
+#define TAG_AEAD 0x41454144
+#define TAG_SCID 0x53434944
+#define TAG_TIME 0x54494d45
+#define TAG_ALPN 0x414C504E
+#define TAG_PUBS 0x50554253
+#define TAG_KEXS 0x4B455853
+#define TAG_NONC 0x4E4F4E43
+
+static const value_string tag_vals[] = {
+    { TAG_SNI, "Server Name Indication" },
+    { TAG_VERS, "Version" },
+    { TAG_SNO, "Server nonce" },
+    { TAG_AEAD, "Authenticated encryption algorithms" },
+    { TAG_SCID, "Server config ID" },
+    { TAG_TIME, "Time" },
+    { TAG_ALPN, "ALPN" },
+    { TAG_PUBS, "Public value" },
+    { TAG_KEXS, "Key exchange algorithms" },
+    { TAG_NONC, "Client Nonce" },
+    { 0, NULL }
+};
+
+
+/**************************************************************************/
+/*                      AEAD Tag                                          */
+/**************************************************************************/
+
+#define AEAD_AESG  0x41455347
+#define AEAD_S20P  0x53323050
+#define AEAD_CC12  0x43433132
+
+static const value_string tag_aead_vals[] = {
+    { AEAD_AESG, "AES-GCM with a 12-byte tag and IV" },
+    { AEAD_S20P, "Salsa20 with Poly1305" },
+    { AEAD_CC12, "Salsa20 with Poly1305" },
+    { 0, NULL }
+};
+
+/**************************************************************************/
+/*                      KEXS Tag                                          */
+/**************************************************************************/
+
+#define KEXS_C255  0x43323535
+#define KEXS_P256  0x50323536
+
+static const value_string tag_kexs_vals[] = {
+    { KEXS_C255, "Curve25519" },
+    { KEXS_P256, "P-256" },
+    { 0, NULL }
+};
+
+
+static guint32
+dissect_fb_zero_tag(tvbuff_t *tvb, packet_info *pinfo, proto_tree *fb_zero_tree, guint offset, guint32 tag_number){
+    guint32 tag_offset_start = offset + tag_number*4*2;
+    guint32 tag_offset = 0, total_tag_len = 0;
+    gint32 tag_len;
+
+    while(tag_number){
+        proto_tree *tag_tree, *ti_len, *ti_tag, *ti_type;
+        guint32 offset_end, tag;
+        const guint8* tag_str;
+
+        ti_tag = proto_tree_add_item(fb_zero_tree, hf_fb_zero_tags, tvb, offset, 8, ENC_NA);
+        tag_tree = proto_item_add_subtree(ti_tag, ett_fb_zero_tag_value);
+        ti_type = proto_tree_add_item_ret_string(tag_tree, hf_fb_zero_tag_type, tvb, offset, 4, ENC_ASCII|ENC_NA, wmem_packet_scope(), &tag_str);
+        tag = tvb_get_ntohl(tvb, offset);
+        proto_item_append_text(ti_type, " (%s)", val_to_str(tag, tag_vals, "Unknown"));
+        proto_item_append_text(ti_tag, ": %s (%s)", tag_str, val_to_str(tag, tag_vals, "Unknown"));
+        offset += 4;
+
+        proto_tree_add_item(tag_tree, hf_fb_zero_tag_offset_end, tvb, offset, 4, ENC_LITTLE_ENDIAN);
+        offset_end = tvb_get_letohl(tvb, offset);
+
+        tag_len = offset_end - tag_offset;
+        total_tag_len += tag_len;
+        ti_len = proto_tree_add_uint(tag_tree, hf_fb_zero_tag_length, tvb, offset, 4, tag_len);
+        proto_item_append_text(ti_tag, " (l=%u)", tag_len);
+        PROTO_ITEM_SET_GENERATED(ti_len);
+        offset += 4;
+
+        /* Fix issue with CRT.. (Fragmentation ?) */
+        if( tag_len > tvb_reported_length_remaining(tvb, tag_offset_start + tag_offset)){
+            tag_len = tvb_reported_length_remaining(tvb, tag_offset_start + tag_offset);
+            offset_end = tag_offset + tag_len;
+            expert_add_info(pinfo, ti_len, &ei_fb_zero_tag_length);
+        }
+
+        proto_tree_add_item(tag_tree, hf_fb_zero_tag_value, tvb, tag_offset_start + tag_offset, tag_len, ENC_NA);
+
+        switch(tag){
+            case TAG_SNI:
+                proto_tree_add_item_ret_string(tag_tree, hf_fb_zero_tag_sni, tvb, tag_offset_start + tag_offset, tag_len, ENC_ASCII|ENC_NA, wmem_packet_scope(), &tag_str);
+                proto_item_append_text(ti_tag, ": %s", tag_str);
+                tag_offset += tag_len;
+            break;
+            case TAG_VERS:
+                proto_tree_add_item_ret_string(tag_tree, hf_fb_zero_tag_vers, tvb, tag_offset_start + tag_offset, 4, ENC_ASCII|ENC_NA, wmem_packet_scope(), &tag_str);
+                proto_item_append_text(ti_tag, ": %s", tag_str);
+                tag_offset += 4;
+            break;
+            case TAG_SNO:
+                proto_tree_add_item(tag_tree, hf_fb_zero_tag_sno, tvb, tag_offset_start + tag_offset, tag_len, ENC_NA);
+                tag_offset += tag_len;
+            break;
+            case TAG_AEAD:
+                while(offset_end - tag_offset >= 4){
+                    proto_tree *ti_aead;
+                    ti_aead = proto_tree_add_item(tag_tree, hf_fb_zero_tag_aead, tvb, tag_offset_start + tag_offset, 4, ENC_ASCII|ENC_NA);
+                    proto_item_append_text(ti_aead, " (%s)", val_to_str(tvb_get_ntohl(tvb, tag_offset_start + tag_offset), tag_aead_vals, "Unknown"));
+                    proto_item_append_text(ti_tag, ", %s", val_to_str(tvb_get_ntohl(tvb, tag_offset_start + tag_offset), tag_aead_vals, "Unknown"));
+                    tag_offset += 4;
+                }
+            break;
+            case TAG_SCID:
+                proto_tree_add_item(tag_tree, hf_fb_zero_tag_scid, tvb, tag_offset_start + tag_offset, tag_len, ENC_NA);
+                tag_offset += tag_len;
+            break;
+            case TAG_TIME:
+                proto_tree_add_item(tag_tree, hf_fb_zero_tag_time, tvb, tag_offset_start + tag_offset, 4, ENC_LITTLE_ENDIAN);
+                proto_item_append_text(ti_tag, ": %u", tvb_get_letohl(tvb, tag_offset_start + tag_offset));
+                tag_offset += 4;
+            break;
+            case TAG_ALPN:
+                proto_tree_add_item_ret_string(tag_tree, hf_fb_zero_tag_alpn, tvb, tag_offset_start + tag_offset, 4, ENC_ASCII|ENC_NA, wmem_packet_scope(), &tag_str);
+                proto_item_append_text(ti_tag, ": %s", tag_str);
+                tag_offset += 4;
+            break;
+            case TAG_PUBS:
+                /*TODO FIX: 24 Length + Pubs key?.. ! */
+                proto_tree_add_item(tag_tree, hf_fb_zero_tag_pubs, tvb, tag_offset_start + tag_offset, 2, ENC_LITTLE_ENDIAN);
+                tag_offset += 2;
+                while(offset_end - tag_offset >= 3){
+                    proto_tree_add_item(tag_tree, hf_fb_zero_tag_pubs, tvb, tag_offset_start + tag_offset, 3, ENC_LITTLE_ENDIAN);
+                    tag_offset += 3;
+                }
+            break;
+            case TAG_KEXS:
+                while(offset_end - tag_offset >= 4){
+                    proto_tree *ti_kexs;
+                    ti_kexs = proto_tree_add_item(tag_tree, hf_fb_zero_tag_kexs, tvb, tag_offset_start + tag_offset, 4, ENC_ASCII|ENC_NA);
+                    proto_item_append_text(ti_kexs, " (%s)", val_to_str(tvb_get_ntohl(tvb, tag_offset_start + tag_offset), tag_kexs_vals, "Unknown"));
+                    proto_item_append_text(ti_tag, ", %s", val_to_str(tvb_get_ntohl(tvb, tag_offset_start + tag_offset), tag_kexs_vals, "Unknown"));
+                    tag_offset += 4;
+                }
+            break;
+            case TAG_NONC:
+                /*TODO: Enhance display: 32 bytes consisting of 4 bytes of timestamp (big-endian, UNIX epoch seconds), 8 bytes of server orbit and 20 bytes of random data. */
+                proto_tree_add_item(tag_tree, hf_fb_zero_tag_nonc, tvb, tag_offset_start + tag_offset, 32, ENC_NA);
+                tag_offset += 32;
+            break;
+
+            default:
+                proto_tree_add_item(tag_tree, hf_fb_zero_tag_unknown, tvb, tag_offset_start + tag_offset, tag_len, ENC_NA);
+                expert_add_info_format(pinfo, ti_tag, &ei_fb_zero_tag_undecoded,
+                                 "Dissector for FB Zero Tag"
+                                 " %s (%s) code not implemented, Contact"
+                                 " Wireshark developers if you want this supported", tvb_get_string_enc(wmem_packet_scope(), tvb, offset-8, 4, ENC_ASCII|ENC_NA), val_to_str(tag, tag_vals, "Unknown"));
+                tag_offset += tag_len;
+            break;
+        }
+
+        if(tag_offset != offset_end){
+            /* Wrong Tag len... */
+            proto_tree_add_expert(tag_tree, pinfo, &ei_fb_zero_tag_unknown, tvb, tag_offset_start + tag_offset, offset_end - tag_offset);
+            tag_offset = offset_end;
+        }
+
+        tag_number--;
+    }
+    return offset + total_tag_len;
+
+}
+
+
+static int
+dissect_fb_zero_unencrypt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *fb_zero_tree, guint offset, guint8 len_pkn _U_){
+
+    while(tvb_reported_length_remaining(tvb, offset) > 0){
+        proto_item *ti;
+        guint32 message_tag, tag_number, length;
+        const guint8* message_tag_str;
+        proto_tree_add_item(fb_zero_tree, hf_fb_zero_unknown, tvb, offset, 1, ENC_NA);
+        offset += 1;
+
+        proto_tree_add_item_ret_uint(fb_zero_tree, hf_fb_zero_length, tvb, offset, 4, ENC_LITTLE_ENDIAN, &length);
+        offset += 4;
+
+        message_tag = tvb_get_ntohl(tvb, offset);
+        /* check if it is a known message_tag (CHLO, SNOM...) */
+        if(try_val_to_str(message_tag, message_tag_vals)){
+            ti = proto_tree_add_item_ret_string(fb_zero_tree, hf_fb_zero_tag, tvb, offset, 4, ENC_ASCII|ENC_NA, wmem_packet_scope(), &message_tag_str);
+
+            proto_item_append_text(ti, ", Type: %s (%s)", message_tag_str, val_to_str(message_tag, message_tag_vals, "Unknown Tag"));
+            col_add_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str(message_tag, message_tag_vals, "Unknown"));
+            offset += 4;
+
+            proto_tree_add_item(fb_zero_tree, hf_fb_zero_tag_number, tvb, offset, 2, ENC_LITTLE_ENDIAN);
+            tag_number = tvb_get_letohs(tvb, offset);
+            offset += 2;
+
+            proto_tree_add_item(fb_zero_tree, hf_fb_zero_padding, tvb, offset, 2, ENC_NA);
+            offset += 2;
+
+            offset = dissect_fb_zero_tag(tvb, pinfo, fb_zero_tree, offset, tag_number);
+        } else {
+            proto_tree_add_item(fb_zero_tree, hf_fb_zero_unknown, tvb, offset, length, ENC_NA);
+            offset += length;
+        }
+    }
+
+    return offset;
+
+}
+
+static int
+dissect_fb_zero_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
+        void *data _U_)
+{
+    proto_item *ti, *ti_puflags;
+    proto_tree *fb_zero_tree, *puflags_tree;
+    guint offset = 0;
+    guint8 puflags;
+    guint32 message_tag, version;
+
+    if (tvb_captured_length(tvb) < FBZERO_MIN_LENGTH)
+        return 0;
+
+
+    col_set_str(pinfo->cinfo, COL_PROTOCOL, "FB_ZERO");
+
+    ti = proto_tree_add_item(tree, proto_fb_zero, tvb, 0, -1, ENC_NA);
+    fb_zero_tree = proto_item_add_subtree(ti, ett_fb_zero);
+
+    /* Public Flags */
+    ti_puflags = proto_tree_add_item(fb_zero_tree, hf_fb_zero_puflags, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+    puflags_tree = proto_item_add_subtree(ti_puflags, ett_fb_zero_puflags);
+    proto_tree_add_item(puflags_tree, hf_fb_zero_puflags_vrsn, tvb, offset, 1, ENC_NA);
+    proto_tree_add_item(puflags_tree, hf_fb_zero_puflags_unknown, tvb, offset, 1, ENC_LITTLE_ENDIAN);
+    puflags = tvb_get_guint8(tvb, offset);
+    offset += 1;
+
+    if(puflags & PUFLAGS_VRSN){
+        version = tvb_get_ntoh24(tvb, offset);
+        if(version == VERSION_QTV){
+            proto_tree_add_item(fb_zero_tree, hf_fb_zero_version, tvb, offset, 3, ENC_ASCII|ENC_NA);
+            offset += 3;
+        }
+    }
+
+    /* Unencrypt Message (Handshake or Connection Close...) */
+    message_tag = tvb_get_ntohl(tvb, offset+5);
+    if (message_tag == MTAG_CHLO || message_tag == MTAG_SNOM) {
+        offset = dissect_fb_zero_unencrypt(tvb, pinfo, fb_zero_tree, offset, 1);
+
+    }else {     /* Payload... (encrypted... TODO FIX !) */
+        col_add_str(pinfo->cinfo, COL_INFO, "Payload (Encrypted)");
+        proto_tree_add_item(fb_zero_tree, hf_fb_zero_payload, tvb, offset, -1, ENC_NA);
+    }
+    return offset;
+}
+
+
+static int
+dissect_fb_zero(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
+              void *data _U_)
+{
+    return dissect_fb_zero_common(tvb, pinfo, tree, NULL);
+}
+
+static gboolean dissect_fb_zero_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
+{
+    conversation_t *conversation = NULL;
+    int offset = 0;
+    guint32 version, length, message_tag;
+    /* Verify packet size  (Flag (1 byte) + Version (3bytes) + Flag (1 byte) + length (4 bytes) + Tag (4 bytes)*/
+    if (tvb_reported_length(tvb) < 13)
+    {
+        return FALSE;
+    }
+
+    /* Flag */
+    offset += 1;
+
+    /* Version */
+    version = tvb_get_ntoh24(tvb, offset);
+    offset += 3;
+
+    /* Flag */
+    offset += 1;
+
+    /* length */
+    length = tvb_get_letohl(tvb, offset);
+    offset += 4;
+
+    /* (message) tag */
+    message_tag = tvb_get_ntohl(tvb, offset);
+
+    if ( version == VERSION_QTV && length <= tvb_reported_length(tvb) && (message_tag == MTAG_CHLO || message_tag == MTAG_SNOM)) {
+        conversation = find_or_create_conversation(pinfo);
+        conversation_set_dissector(conversation, fb_zero_handle);
+        dissect_fb_zero(tvb, pinfo, tree, data);
+        return TRUE;
+    }
+
+    return FALSE;
+}
+
+void
+proto_register_fb_zero(void)
+{
+    static hf_register_info hf[] = {
+        { &hf_fb_zero_puflags,
+            { "Public Flags", "fb_zero.puflags",
+               FT_UINT8, BASE_HEX, NULL, 0x0,
+              "Specifying per-packet public flags", HFILL }
+        },
+        { &hf_fb_zero_puflags_vrsn,
+            { "Version", "fb_zero.puflags.version",
+               FT_BOOLEAN, 8, TFS(&tfs_yes_no), PUFLAGS_VRSN,
+              "Signifies that this packet also contains the version of the FB Zero protocol", HFILL }
+        },
+        { &hf_fb_zero_puflags_unknown,
+            { "Unknown", "fb_zero.puflags.unknown",
+               FT_UINT8, BASE_HEX, NULL, PUFLAGS_UNKN,
+              NULL, HFILL }
+        },
+
+        { &hf_fb_zero_version,
+            { "Version", "fb_zero.version",
+               FT_STRING, BASE_NONE, NULL, 0x0,
+              "32 bit opaque tag that represents the version of the ZB Zero (Always QTV)", HFILL }
+        },
+        { &hf_fb_zero_length,
+            { "Length", "fb_zero.length",
+               FT_UINT32, BASE_DEC, NULL, 0x0,
+              NULL, HFILL }
+        },
+        { &hf_fb_zero_tag,
+            { "Tag", "fb_zero.tag",
+               FT_STRING, BASE_NONE, NULL, 0x0,
+              NULL, HFILL }
+        },
+        { &hf_fb_zero_tag_number,
+            { "Tag Number", "fb_zero.tag_number",
+               FT_UINT16, BASE_DEC, NULL, 0x0,
+              NULL, HFILL }
+        },
+        { &hf_fb_zero_tags,
+            { "Tag/value", "fb_zero.tags",
+               FT_NONE, BASE_NONE, NULL, 0x0,
+              NULL, HFILL }
+        },
+        { &hf_fb_zero_tag_type,
+            { "Tag Type", "fb_zero.tag_type",
+               FT_STRING, BASE_NONE, NULL, 0x0,
+              NULL, HFILL }
+        },
+        { &hf_fb_zero_tag_offset_end,
+            { "Tag offset end", "fb_zero.tag_offset_end",
+               FT_UINT32, BASE_DEC, NULL, 0x0,
+              NULL, HFILL }
+        },
+        { &hf_fb_zero_tag_length,
+            { "Tag length", "fb_zero.tag_offset_length",
+               FT_UINT32, BASE_DEC, NULL, 0x0,
+              NULL, HFILL }
+        },
+        { &hf_fb_zero_tag_value,
+            { "Tag/value", "fb_zero.tag_value",
+               FT_BYTES, BASE_NONE, NULL, 0x0,
+              NULL, HFILL }
+        },
+        { &hf_fb_zero_tag_sni,
+            { "Server Name Indication", "fb_zero.tag.sni",
+               FT_STRING, BASE_NONE, NULL, 0x0,
+              "The fully qualified DNS name of the server, canonicalised to lowercase with no trailing period", HFILL }
+        },
+        { &hf_fb_zero_tag_vers,
+            { "Version", "fb_zero.tag.version",
+               FT_STRING, BASE_NONE, NULL, 0x0,
+              "Version of FB Zero supported", HFILL }
+        },
+        { &hf_fb_zero_tag_sno,
+            { "Server nonce", "fb_zero.tag.sno",
+               FT_BYTES, BASE_NONE, NULL, 0x0,
+              NULL, HFILL }
+        },
+        { &hf_fb_zero_tag_aead,
+            { "Authenticated encryption algorithms", "fb_zero.tag.aead",
+               FT_STRING, BASE_NONE, NULL, 0x0,
+              "A list of tags, in preference order, specifying the AEAD primitives supported by the server", HFILL }
+        },
+        { &hf_fb_zero_tag_scid,
+            { "Server Config ID", "fb_zero.tag.scid",
+               FT_BYTES, BASE_NONE, NULL, 0x0,
+              "An opaque, 16-byte identifier for this server config", HFILL }
+        },
+        { &hf_fb_zero_tag_time,
+            { "Time", "fb_zero.tag.time",
+               FT_UINT32, BASE_DEC, NULL, 0x0,
+               NULL, HFILL }
+        },
+        { &hf_fb_zero_tag_alpn,
+            { "ALPN", "fb_zero.tag.alpn",
+               FT_STRING, BASE_NONE, NULL, 0x0,
+               "Application-Layer Protocol Negotiation supported", HFILL }
+        },
+        { &hf_fb_zero_tag_pubs,
+            { "Public value", "fb_zero.tag.pubs",
+               FT_UINT24, BASE_DEC_HEX, NULL, 0x0,
+              "A list of public values, 24-bit, little-endian length prefixed", HFILL }
+        },
+        { &hf_fb_zero_tag_kexs,
+            { "Key exchange algorithms", "fb_zero.tag.kexs",
+               FT_STRING, BASE_NONE, NULL, 0x0,
+              "A list of tags, in preference order, specifying the key exchange algorithms that the server supports", HFILL }
+        },
+        { &hf_fb_zero_tag_nonc,
+            { "Client nonce", "fb_zero.tag.nonc",
+               FT_BYTES, BASE_NONE, NULL, 0x0,
+              "32 bytes consisting of 4 bytes of timestamp (big-endian, UNIX epoch seconds), 8 bytes of server orbit and 20 bytes of random data", HFILL }
+        },
+        { &hf_fb_zero_tag_unknown,
+            { "Unknown tag", "fb_zero.tag.unknown",
+               FT_BYTES, BASE_NONE, NULL, 0x0,
+              NULL, HFILL }
+        },
+        { &hf_fb_zero_padding,
+            { "Padding", "fb_zero.padding",
+               FT_BYTES, BASE_NONE, NULL, 0x0,
+              NULL, HFILL }
+        },
+        { &hf_fb_zero_payload,
+            { "Payload", "fb_zero.payload",
+               FT_BYTES, BASE_NONE, NULL, 0x0,
+              "Fb Zero Payload..", HFILL }
+        },
+        { &hf_fb_zero_unknown,
+            { "Unknown", "fb_zero.unknown",
+               FT_BYTES, BASE_NONE, NULL, 0x0,
+              "Unknown Data", HFILL }
+        },
+    };
+
+
+    static gint *ett[] = {
+        &ett_fb_zero,
+        &ett_fb_zero_puflags,
+        &ett_fb_zero_prflags,
+        &ett_fb_zero_ft,
+        &ett_fb_zero_ftflags,
+        &ett_fb_zero_tag_value
+    };
+
+    static ei_register_info ei[] = {
+        { &ei_fb_zero_tag_undecoded, { "fb_zero.tag.undecoded", PI_UNDECODED, PI_NOTE, "Dissector for FB Zero Tag code not implemented, Contact Wireshark developers if you want this supported", EXPFILL }},
+        { &ei_fb_zero_tag_length, { "fb_zero.tag.length.truncated", PI_MALFORMED, PI_NOTE, "Truncated Tag Length...", EXPFILL }},
+        { &ei_fb_zero_tag_unknown, { "fb_zero.tag.unknown.data", PI_UNDECODED, PI_NOTE, "Unknown Data", EXPFILL }},
+    };
+
+    expert_module_t *expert_fb_zero;
+
+    proto_fb_zero = proto_register_protocol("(Facebook) Zero Protocol", "FBZERO", "fb_zero");
+
+    fb_zero_handle = register_dissector("fb_zero", dissect_fb_zero, proto_fb_zero);
+
+    proto_register_field_array(proto_fb_zero, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+
+    expert_fb_zero = expert_register_protocol(proto_fb_zero);
+    expert_register_field_array(expert_fb_zero, ei, array_length(ei));
+}
+
+void
+proto_reg_handoff_fb_zero(void)
+{
+
+    heur_dissector_add("tcp", dissect_fb_zero_heur, "FBZero (QUIC) over TCP", "fb_zero", proto_fb_zero, HEURISTIC_ENABLE);
+
+}
+
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */