diff options
author | Alexis La Goutte <alexis.lagoutte@gmail.com> | 2016-11-21 14:01:36 +0100 |
---|---|---|
committer | Peter Wu <peter@lekensteyn.nl> | 2017-06-01 22:09:02 +0000 |
commit | c65960fae8fc7a2dd420794cc833b070b12103ba (patch) | |
tree | b52ada2e136e7e74594743eb7ab92a8a25d2c864 /epan/dissectors/packet-fbzero.c | |
parent | 32f0d80988847a51d1401151f635f6878a0f66a7 (diff) |
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>
Diffstat (limited to 'epan/dissectors/packet-fbzero.c')
-rw-r--r-- | epan/dissectors/packet-fbzero.c | 612 |
1 files changed, 612 insertions, 0 deletions
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: + */ |