forked from osmocom/wireshark
![Anders Broman](/assets/img/avatar_default.png)
Bluetooth: Fix uninitialized fields on the USB side Also make indentation/spaces cleanup in hci_usb dissector. Part of: https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5032 svn path=/trunk/; revision=46341
333 lines
12 KiB
C
333 lines
12 KiB
C
/* packet-hci_usb.c
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* Routines for Bluetooth HCI USB dissection
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*
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* Copyright 2012, Michal Labedzki for Tieto Corporation
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/prefs.h>
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#include <epan/reassemble.h>
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#include "packet-usb.h"
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#include "packet-bluetooth-hci.h"
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static int proto_hci_usb = -1;
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static int hf_bthci_usb_data = -1;
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static gint ett_hci_usb = -1;
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static gint ett_hci_usb_msg_fragment = -1;
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static gint ett_hci_usb_msg_fragments = -1;
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static int hf_msg_fragments = -1;
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static int hf_msg_fragment = -1;
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static int hf_msg_fragment_overlap = -1;
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static int hf_msg_fragment_overlap_conflicts = -1;
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static int hf_msg_fragment_multiple_tails = -1;
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static int hf_msg_fragment_too_long_fragment = -1;
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static int hf_msg_fragment_error = -1;
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static int hf_msg_fragment_count = -1;
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static int hf_msg_reassembled_in = -1;
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static int hf_msg_reassembled_length = -1;
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static emem_tree_t *chandle_to_bdaddr_table = NULL;
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static emem_tree_t *bdaddr_to_name_table = NULL;
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static emem_tree_t *localhost_name = NULL;
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static emem_tree_t *localhost_bdaddr = NULL;
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static emem_tree_t *fragment_info_table = NULL;
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static GHashTable *fragment_table = NULL;
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static GHashTable *reassembled_table = NULL;
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typedef struct _fragment_info_t {
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gint remaining_length;
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gint fragment_id;
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} fragment_info_t;
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static const fragment_items hci_usb_msg_frag_items = {
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/* Fragment subtrees */
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&ett_hci_usb_msg_fragment,
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&ett_hci_usb_msg_fragments,
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/* Fragment fields */
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&hf_msg_fragments,
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&hf_msg_fragment,
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&hf_msg_fragment_overlap,
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&hf_msg_fragment_overlap_conflicts,
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&hf_msg_fragment_multiple_tails,
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&hf_msg_fragment_too_long_fragment,
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&hf_msg_fragment_error,
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&hf_msg_fragment_count,
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/* Reassembled in field */
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&hf_msg_reassembled_in,
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/* Reassembled length field */
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&hf_msg_reassembled_length,
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/* Reassembled data field */
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NULL,
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/* Tag */
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"Message fragments"
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};
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static int
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dissect_hci_usb(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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{
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proto_item *ttree = NULL;
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proto_tree *titem = NULL;
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proto_item *pitem = NULL;
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gint offset = 0;
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usb_data_t *usb_data;
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tvbuff_t *next_tvb = NULL;
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void *pd_save;
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hci_data_t *hci_data;
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gint p2p_dir_save;
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guint32 session_id;
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fragment_data *reassembled;
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if (tvb_length_remaining(tvb, offset) <= 0)
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return 0;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "HCI_USB");
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col_clear(pinfo->cinfo, COL_INFO);
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usb_data = (usb_data_t *) pinfo->private_data;
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p2p_dir_save = pinfo->p2p_dir;
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pinfo->p2p_dir = usb_data->direction;
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switch (pinfo->p2p_dir) {
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case P2P_DIR_SENT:
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col_add_str(pinfo->cinfo, COL_INFO, "Sent");
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break;
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case P2P_DIR_RECV:
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col_add_str(pinfo->cinfo, COL_INFO, "Rcvd");
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break;
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default:
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col_add_fstr(pinfo->cinfo, COL_INFO, "Unknown direction");
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break;
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}
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titem = proto_tree_add_item(tree, proto_hci_usb, tvb, offset, -1, ENC_NA);
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ttree = proto_item_add_subtree(titem, ett_hci_usb);
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pd_save = pinfo->private_data;
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session_id = usb_data->bus_id << 16 | usb_data->device_address << 8 | ((pinfo->p2p_dir == P2P_DIR_RECV) ? 1 : 0 ) << 7 | usb_data->endpoint;
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hci_data = ep_alloc(sizeof(hci_data_t));
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hci_data->interface_id = HCI_INTERFACE_USB;
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hci_data->adapter_id = usb_data->bus_id << 8 | usb_data->device_address;
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hci_data->chandle_to_bdaddr_table = chandle_to_bdaddr_table;
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hci_data->bdaddr_to_name_table = bdaddr_to_name_table;
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hci_data->localhost_bdaddr = localhost_bdaddr;
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hci_data->localhost_name = localhost_name;
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pinfo->private_data = hci_data;
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next_tvb = tvb_new_subset_remaining(tvb, offset);
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if (!pinfo->fd->flags.visited && usb_data->endpoint <= 0x02) {
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fragment_info_t *fragment_info;
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fragment_info = se_tree_lookup32(fragment_info_table, session_id);
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if (fragment_info == NULL) {
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fragment_info = se_alloc(sizeof(fragment_info_t));
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fragment_info->fragment_id = 0;
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fragment_info->remaining_length = 0;
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se_tree_insert32(fragment_info_table, session_id, fragment_info);
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}
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if (fragment_info->fragment_id == 0) {
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if (usb_data->endpoint == 0x00) {
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fragment_info->remaining_length = tvb_get_guint8(tvb, offset + 2) + 3;
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} else if (usb_data->endpoint == 0x01) {
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fragment_info->remaining_length = tvb_get_guint8(tvb, offset + 1) + 2;
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} else if (usb_data->endpoint == 0x02) {
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fragment_info->remaining_length = tvb_get_letohs(tvb, offset + 2) + 4;
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}
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}
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fragment_info->remaining_length -= tvb_ensure_length_remaining(tvb, offset);
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fragment_add_seq_check(tvb, offset, pinfo, session_id, fragment_table, reassembled_table, fragment_info->fragment_id, tvb_length_remaining(tvb, offset), (fragment_info->remaining_length == 0) ? FALSE : TRUE);
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if (fragment_info->remaining_length > 0)
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fragment_info->fragment_id += 1;
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else
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fragment_info->fragment_id = 0;
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}
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reassembled = fragment_get_reassembled_id(pinfo, session_id, reassembled_table);
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if (reassembled && pinfo->fd->num < reassembled->reassembled_in) {
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pitem = proto_tree_add_text(ttree, tvb, offset, -1, "Fragment");
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PROTO_ITEM_SET_GENERATED(pitem);
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col_append_fstr(pinfo->cinfo, COL_INFO, " Fragment");
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} else if (reassembled && pinfo->fd->num == reassembled->reassembled_in) {
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pitem = proto_tree_add_text(ttree, tvb, offset, -1, "Complete");
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PROTO_ITEM_SET_GENERATED(pitem);
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if (reassembled->len > tvb_ensure_length_remaining(tvb, offset)) {
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next_tvb = process_reassembled_data(tvb, 0, pinfo,
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"Reassembled HCI_USB",
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reassembled, &hci_usb_msg_frag_items,
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NULL, ttree);
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}
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if (usb_data->endpoint == 0x00) {
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call_dissector(find_dissector("bthci_cmd"), next_tvb, pinfo, tree);
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} else if (usb_data->endpoint == 0x01) {
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call_dissector(find_dissector("bthci_evt"), next_tvb, pinfo, tree);
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} else if (usb_data->endpoint == 0x02) {
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call_dissector(find_dissector("bthci_acl"), next_tvb, pinfo, tree);
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}
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} else {
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pitem = proto_tree_add_text(ttree, tvb, offset, -1, "Unknown Fragment");
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PROTO_ITEM_SET_GENERATED(pitem);
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}
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if (usb_data->endpoint == 0x03) {
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call_dissector(find_dissector("bthci_sco"), next_tvb, pinfo, tree);
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} else if (usb_data->endpoint > 0x03) {
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proto_tree_add_item(ttree, hf_bthci_usb_data, tvb, offset, -1, ENC_BIG_ENDIAN);
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}
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offset += tvb_length_remaining(tvb, offset);
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pinfo->p2p_dir = p2p_dir_save;
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pinfo->private_data = pd_save;
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return offset;
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}
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void
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proto_register_hci_usb(void)
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{
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module_t *module;
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static hf_register_info hf[] = {
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{ &hf_msg_fragments,
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{ "Message fragments", "hci_usb.msg.fragments",
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FT_NONE, BASE_NONE, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_msg_fragment,
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{ "Message fragment", "hci_usb.msg.fragment",
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FT_FRAMENUM, BASE_NONE, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_msg_fragment_overlap,
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{ "Message fragment overlap", "hci_usb.msg.fragment.overlap",
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FT_BOOLEAN, BASE_NONE, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_msg_fragment_overlap_conflicts,
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{ "Message fragment overlapping with conflicting data", "hci_usb.msg.fragment.overlap.conflicts",
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FT_BOOLEAN, BASE_NONE, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_msg_fragment_multiple_tails,
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{ "Message has multiple tail fragments", "hci_usb.msg.fragment.multiple_tails",
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FT_BOOLEAN, BASE_NONE, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_msg_fragment_too_long_fragment,
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{ "Message fragment too long", "hci_usb.msg.fragment.too_long_fragment",
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FT_BOOLEAN, BASE_NONE, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_msg_fragment_error,
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{ "Message defragmentation error", "hci_usb.msg.fragment.error",
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FT_FRAMENUM, BASE_NONE, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_msg_fragment_count,
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{ "Message fragment count", "hci_usb.msg.fragment.count",
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FT_UINT32, BASE_DEC, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_msg_reassembled_in,
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{ "Reassembled in", "hci_usb.msg.reassembled.in",
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FT_FRAMENUM, BASE_NONE, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_msg_reassembled_length,
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{ "Reassembled MP2T length", "hci_usb.msg.reassembled.length",
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FT_UINT32, BASE_DEC, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_bthci_usb_data,
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{ "Unknown Data", "hci_usb.data",
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FT_NONE, BASE_NONE, NULL, 0x00,
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NULL, HFILL }
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}
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};
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static gint *ett[] = {
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&ett_hci_usb,
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&ett_hci_usb_msg_fragment,
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&ett_hci_usb_msg_fragments,
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};
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fragment_table_init(&fragment_table);
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reassembled_table_init(&reassembled_table);
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fragment_info_table = se_tree_create(EMEM_TREE_TYPE_RED_BLACK, "hci_usb fragment_info");
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chandle_to_bdaddr_table = se_tree_create(EMEM_TREE_TYPE_RED_BLACK, "hci_usb adapter/chandle to bdaddr");
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bdaddr_to_name_table = se_tree_create(EMEM_TREE_TYPE_RED_BLACK, "hci_usb bdaddr to name");
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localhost_bdaddr = se_tree_create(EMEM_TREE_TYPE_RED_BLACK, "hci_usb adaper/frame to bdaddr");
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localhost_name = se_tree_create(EMEM_TREE_TYPE_RED_BLACK, "hci_usb adaper/frame to name");
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proto_hci_usb = proto_register_protocol("Bluetooth HCI USB Transport", "HCI_USB", "hci_usb");
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proto_register_field_array(proto_hci_usb, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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new_register_dissector("hci_usb", dissect_hci_usb, proto_hci_usb);
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module = prefs_register_protocol(proto_hci_usb, NULL);
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prefs_register_static_text_preference(module, "bthci_usb.version",
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"Bluetooth HCI USB Transport from Core 4.0",
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"Version of protocol supported by this dissector.");
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}
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void
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proto_reg_handoff_hci_usb(void)
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{
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dissector_handle_t hci_usb_handle;
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hci_usb_handle = find_dissector("hci_usb");
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dissector_add_uint("usb.product", (0x0a5c << 16) | 0x21e8, hci_usb_handle);
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dissector_add_uint("usb.product", (0x1131 << 16) | 0x1001, hci_usb_handle);
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dissector_add_uint("usb.product", (0x050d << 16) | 0x0081, hci_usb_handle);
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dissector_add_uint("usb.product", (0x0a5c << 16) | 0x2198, hci_usb_handle);
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dissector_add_uint("usb.product", (0x0a5c << 16) | 0x21e8, hci_usb_handle);
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dissector_add_uint("usb.product", (0x04bf << 16) | 0x0320, hci_usb_handle);
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dissector_add_uint("usb.product", (0x13d3 << 16) | 0x3375, hci_usb_handle);
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dissector_add_uint("usb.protocol", 0xE00101, hci_usb_handle);
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dissector_add_handle("usb.device", hci_usb_handle);
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}
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