a8bc4a0d13
keys to have _uint in their names, to match the routines that handle dissector tables with string keys. (Using _port can confuse people into thinking they're intended solely for use with TCP/UDP/etc. ports when, in fact, they work better for things such as Ethernet types, where the binding of particular values to particular protocols are a lot stronger.) svn path=/trunk/; revision=35224
452 lines
14 KiB
C
452 lines
14 KiB
C
/* packet-usb-masstorage.c
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*
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* $Id$
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*
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* usb mass storage dissector
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* Ronnie Sahlberg 2006
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/emem.h>
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#include <epan/conversation.h>
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#include "packet-usb.h"
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#include "packet-scsi.h"
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/* protocols and header fields */
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static int proto_usb_ms = -1;
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static int hf_usb_ms_dCBWSignature = -1;
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static int hf_usb_ms_dCBWTag = -1;
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static int hf_usb_ms_dCBWDataTransferLength = -1;
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static int hf_usb_ms_dCBWFlags = -1;
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static int hf_usb_ms_dCBWLUN = -1;
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static int hf_usb_ms_dCBWCBLength = -1;
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static int hf_usb_ms_dCSWSignature = -1;
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static int hf_usb_ms_dCSWDataResidue = -1;
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static int hf_usb_ms_dCSWStatus = -1;
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static int hf_usb_ms_request = -1;
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static int hf_usb_ms_value = -1;
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static int hf_usb_ms_index = -1;
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static int hf_usb_ms_length = -1;
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static int hf_usb_ms_maxlun = -1;
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static gint ett_usb_ms = -1;
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/* there is one such structure for each masstorage conversation */
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typedef struct _usb_ms_conv_info_t {
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emem_tree_t *itl; /* indexed by LUN */
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emem_tree_t *itlq; /* pinfo->fd->num */
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} usb_ms_conv_info_t;
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static const value_string status_vals[] = {
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{0x00, "Command Passed"},
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{0x01, "Command Failed"},
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{0x02, "Phase Error"},
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{0, NULL}
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};
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static void
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dissect_usb_ms_reset(packet_info *pinfo _U_, proto_tree *tree, tvbuff_t *tvb, int offset, gboolean is_request, usb_trans_info_t *usb_trans_info _U_, usb_conv_info_t *usb_conv_info _U_)
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{
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if(is_request){
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proto_tree_add_item(tree, hf_usb_ms_value, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(tree, hf_usb_ms_index, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(tree, hf_usb_ms_length, tvb, offset, 2, FALSE);
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offset += 2;
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} else {
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/* no data in reset response */
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}
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}
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static void
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dissect_usb_ms_get_max_lun(packet_info *pinfo _U_, proto_tree *tree, tvbuff_t *tvb, int offset, gboolean is_request, usb_trans_info_t *usb_trans_info _U_, usb_conv_info_t *usb_conv_info _U_)
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{
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if(is_request){
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proto_tree_add_item(tree, hf_usb_ms_value, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(tree, hf_usb_ms_index, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(tree, hf_usb_ms_length, tvb, offset, 2, FALSE);
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offset += 2;
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} else {
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proto_tree_add_item(tree, hf_usb_ms_maxlun, tvb, offset, 1, FALSE);
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offset++;
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}
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}
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typedef void (*usb_setup_dissector)(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gboolean is_request, usb_trans_info_t *usb_trans_info, usb_conv_info_t *usb_conv_info);
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typedef struct _usb_setup_dissector_table_t {
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guint8 request;
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usb_setup_dissector dissector;
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} usb_setup_dissector_table_t;
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#define USB_SETUP_RESET 0xff
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#define USB_SETUP_GET_MAX_LUN 0xfe
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static const usb_setup_dissector_table_t setup_dissectors[] = {
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{USB_SETUP_RESET, dissect_usb_ms_reset},
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{USB_SETUP_GET_MAX_LUN, dissect_usb_ms_get_max_lun},
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{0, NULL}
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};
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static const value_string setup_request_names_vals[] = {
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{USB_SETUP_RESET, "RESET"},
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{USB_SETUP_GET_MAX_LUN, "GET MAX LUN"},
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{0, NULL}
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};
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/* Dissector for mass storage control .
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* Returns TRUE if a class specific dissector was found
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* and FALSE othervise.
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*/
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static gint
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dissect_usb_ms_control(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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gboolean is_request;
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usb_conv_info_t *usb_conv_info;
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usb_trans_info_t *usb_trans_info;
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int offset=0;
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usb_setup_dissector dissector;
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const usb_setup_dissector_table_t *tmp;
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is_request=(pinfo->srcport==NO_ENDPOINT);
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usb_conv_info=pinfo->usb_conv_info;
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usb_trans_info=usb_conv_info->usb_trans_info;
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/* See if we can find a class specific dissector for this request */
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dissector=NULL;
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for(tmp=setup_dissectors;tmp->dissector;tmp++){
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if(tmp->request==usb_trans_info->request){
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dissector=tmp->dissector;
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break;
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}
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}
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/* No we could not find any class specific dissector for this request
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* return FALSE and let USB try any of the standard requests.
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*/
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if(!dissector){
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return FALSE;
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}
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "USBMS");
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_add_fstr(pinfo->cinfo, COL_INFO, "%s %s",
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val_to_str(usb_trans_info->request, setup_request_names_vals, "Unknown type %x"),
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is_request?"Request":"Response");
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}
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if(is_request){
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proto_tree_add_item(tree, hf_usb_ms_request, tvb, offset, 1, TRUE);
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offset += 1;
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}
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dissector(pinfo, tree, tvb, offset, is_request, usb_trans_info, usb_conv_info);
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return TRUE;
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}
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/* dissector for mass storage bulk data */
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static void
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dissect_usb_ms_bulk(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
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{
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usb_conv_info_t *usb_conv_info;
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usb_ms_conv_info_t *usb_ms_conv_info;
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proto_tree *tree=NULL;
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guint32 signature=0;
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int offset=0;
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gboolean is_request;
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itl_nexus_t *itl;
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itlq_nexus_t *itlq;
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usb_conv_info=pinfo->usb_conv_info;
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/* verify that we do have a usb_ms_conv_info */
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usb_ms_conv_info=usb_conv_info->class_data;
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if(!usb_ms_conv_info){
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usb_ms_conv_info=se_alloc(sizeof(usb_ms_conv_info_t));
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usb_ms_conv_info->itl=se_tree_create_non_persistent(EMEM_TREE_TYPE_RED_BLACK, "USB ITL");
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usb_ms_conv_info->itlq=se_tree_create_non_persistent(EMEM_TREE_TYPE_RED_BLACK, "USB ITLQ");
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usb_conv_info->class_data=usb_ms_conv_info;
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}
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is_request=(pinfo->srcport==NO_ENDPOINT);
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "USBMS");
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col_clear(pinfo->cinfo, COL_INFO);
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if(parent_tree){
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proto_item *ti = NULL;
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ti = proto_tree_add_protocol_format(parent_tree, proto_usb_ms, tvb, 0, -1, "USB Mass Storage");
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tree = proto_item_add_subtree(ti, ett_usb_ms);
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}
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signature=tvb_get_letohl(tvb, offset);
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/*
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* SCSI CDB inside CBW
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*/
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if(is_request&&(signature==0x43425355)&&(tvb_length(tvb)==31)){
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tvbuff_t *cdb_tvb;
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int cdbrlen, cdblen;
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guint8 lun, flags;
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guint32 datalen;
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/* dCBWSignature */
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proto_tree_add_item(tree, hf_usb_ms_dCBWSignature, tvb, offset, 4, TRUE);
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offset+=4;
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/* dCBWTag */
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proto_tree_add_item(tree, hf_usb_ms_dCBWTag, tvb, offset, 4, TRUE);
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offset+=4;
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/* dCBWDataTransferLength */
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proto_tree_add_item(tree, hf_usb_ms_dCBWDataTransferLength, tvb, offset, 4, TRUE);
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datalen=tvb_get_letohl(tvb, offset);
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offset+=4;
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/* dCBWFlags */
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proto_tree_add_item(tree, hf_usb_ms_dCBWFlags, tvb, offset, 1, TRUE);
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flags=tvb_get_guint8(tvb, offset);
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offset+=1;
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/* dCBWLUN */
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proto_tree_add_item(tree, hf_usb_ms_dCBWLUN, tvb, offset, 1, TRUE);
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lun=tvb_get_guint8(tvb, offset)&0x0f;
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offset+=1;
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/* make sure we have a ITL structure for this LUN */
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itl=(itl_nexus_t *)se_tree_lookup32(usb_ms_conv_info->itl, lun);
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if(!itl){
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itl=se_alloc(sizeof(itl_nexus_t));
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itl->cmdset=0xff;
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itl->conversation=NULL;
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se_tree_insert32(usb_ms_conv_info->itl, lun, itl);
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}
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/* make sure we have an ITLQ structure for this LUN/transaction */
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itlq=(itlq_nexus_t *)se_tree_lookup32(usb_ms_conv_info->itlq, pinfo->fd->num);
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if(!itlq){
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itlq=se_alloc(sizeof(itlq_nexus_t));
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itlq->lun=lun;
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itlq->scsi_opcode=0xffff;
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itlq->task_flags=0;
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if(datalen){
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if(flags&0x80){
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itlq->task_flags|=SCSI_DATA_READ;
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} else {
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itlq->task_flags|=SCSI_DATA_WRITE;
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}
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}
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itlq->data_length=datalen;
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itlq->bidir_data_length=0;
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itlq->fc_time=pinfo->fd->abs_ts;
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itlq->first_exchange_frame=pinfo->fd->num;
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itlq->last_exchange_frame=0;
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itlq->flags=0;
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itlq->alloc_len=0;
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itlq->extra_data=NULL;
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se_tree_insert32(usb_ms_conv_info->itlq, pinfo->fd->num, itlq);
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}
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/* dCBWCBLength */
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proto_tree_add_item(tree, hf_usb_ms_dCBWCBLength, tvb, offset, 1, TRUE);
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cdbrlen=tvb_get_guint8(tvb, offset)&0x1f;
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offset+=1;
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cdblen=cdbrlen;
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if(cdblen>tvb_length_remaining(tvb, offset)){
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cdblen=tvb_length_remaining(tvb, offset);
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}
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if(cdblen){
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cdb_tvb=tvb_new_subset(tvb, offset, cdblen, cdbrlen);
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dissect_scsi_cdb(cdb_tvb, pinfo, parent_tree, SCSI_DEV_UNKNOWN, itlq, itl);
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}
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return;
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}
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/*
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* SCSI RESPONSE inside CSW
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*/
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if((!is_request)&&(signature==0x53425355)&&(tvb_length(tvb)==13)){
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guint8 status;
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/* dCSWSignature */
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proto_tree_add_item(tree, hf_usb_ms_dCSWSignature, tvb, offset, 4, TRUE);
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offset+=4;
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/* dCSWTag */
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proto_tree_add_item(tree, hf_usb_ms_dCBWTag, tvb, offset, 4, TRUE);
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offset+=4;
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/* dCSWDataResidue */
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proto_tree_add_item(tree, hf_usb_ms_dCSWDataResidue, tvb, offset, 4, TRUE);
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offset+=4;
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/* dCSWStatus */
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proto_tree_add_item(tree, hf_usb_ms_dCSWStatus, tvb, offset, 1, TRUE);
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status=tvb_get_guint8(tvb, offset);
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offset+=1;
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itlq=(itlq_nexus_t *)se_tree_lookup32_le(usb_ms_conv_info->itlq, pinfo->fd->num);
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if(!itlq){
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return;
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}
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itlq->last_exchange_frame=pinfo->fd->num;
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itl=(itl_nexus_t *)se_tree_lookup32(usb_ms_conv_info->itl, itlq->lun);
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if(!itl){
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return;
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}
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if(!status){
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dissect_scsi_rsp(tvb, pinfo, parent_tree, itlq, itl, 0);
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} else {
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/* just send "check condition" */
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dissect_scsi_rsp(tvb, pinfo, parent_tree, itlq, itl, 0x02);
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}
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return;
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}
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/*
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* Ok it was neither CDB not STATUS so just assume it is either data in/out
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*/
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itlq=(itlq_nexus_t *)se_tree_lookup32_le(usb_ms_conv_info->itlq, pinfo->fd->num);
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if(!itlq){
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return;
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}
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itl=(itl_nexus_t *)se_tree_lookup32(usb_ms_conv_info->itl, itlq->lun);
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if(!itl){
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return;
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}
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dissect_scsi_payload(tvb, pinfo, parent_tree, is_request, itlq, itl, 0);
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}
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void
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proto_register_usb_ms(void)
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{
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static hf_register_info hf[] = {
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{ &hf_usb_ms_dCBWSignature,
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{ "Signature", "usbms.dCBWSignature", FT_UINT32, BASE_HEX,
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NULL, 0x0, NULL, HFILL }},
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{ &hf_usb_ms_dCBWTag,
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{ "Tag", "usbms.dCBWTag", FT_UINT32, BASE_HEX,
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NULL, 0x0, NULL, HFILL }},
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{ &hf_usb_ms_dCBWDataTransferLength,
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{ "DataTransferLength", "usbms.dCBWDataTransferLength", FT_UINT32, BASE_DEC,
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NULL, 0x0, NULL, HFILL }},
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{ &hf_usb_ms_dCBWFlags,
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{ "Flags", "usbms.dCBWFlags", FT_UINT8, BASE_HEX,
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NULL, 0x0, NULL, HFILL }},
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{ &hf_usb_ms_dCBWLUN,
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{ "LUN", "usbms.dCBWLUN", FT_UINT8, BASE_HEX,
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NULL, 0x0f, NULL, HFILL }},
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{ &hf_usb_ms_dCBWCBLength,
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{ "CDB Length", "usbms.dCBWCBLength", FT_UINT8, BASE_HEX,
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NULL, 0x1f, NULL, HFILL }},
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{ &hf_usb_ms_dCSWSignature,
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{ "Signature", "usbms.dCSWSignature", FT_UINT32, BASE_HEX,
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NULL, 0x0, NULL, HFILL }},
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{ &hf_usb_ms_dCSWDataResidue,
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{ "DataResidue", "usbms.dCSWDataResidue", FT_UINT32, BASE_DEC,
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NULL, 0x0, NULL, HFILL }},
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{ &hf_usb_ms_dCSWStatus,
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{ "Status", "usbms.dCSWStatus", FT_UINT8, BASE_HEX,
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VALS(status_vals), 0x0, NULL, HFILL }},
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{ &hf_usb_ms_request,
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{ "bRequest", "usbms.setup.bRequest", FT_UINT8, BASE_HEX, VALS(setup_request_names_vals), 0x0,
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NULL, HFILL }},
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{ &hf_usb_ms_value,
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{ "wValue", "usbms.setup.wValue", FT_UINT16, BASE_HEX, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_usb_ms_index,
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{ "wIndex", "usbms.setup.wIndex", FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_usb_ms_length,
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{ "wLength", "usbms.setup.wLength", FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_usb_ms_maxlun,
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{ "Max LUN", "usbms.setup.maxlun", FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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};
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static gint *usb_ms_subtrees[] = {
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&ett_usb_ms,
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};
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proto_usb_ms = proto_register_protocol("USB Mass Storage", "USBMS", "usbms");
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proto_register_field_array(proto_usb_ms, hf, array_length(hf));
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proto_register_subtree_array(usb_ms_subtrees, array_length(usb_ms_subtrees));
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register_dissector("usbms", dissect_usb_ms_bulk, proto_usb_ms);
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}
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void
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proto_reg_handoff_usb_ms(void)
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{
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dissector_handle_t usb_ms_bulk_handle;
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dissector_handle_t usb_ms_control_handle;
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usb_ms_bulk_handle = find_dissector("usbms");
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dissector_add_uint("usb.bulk", IF_CLASS_MASSTORAGE, usb_ms_bulk_handle);
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usb_ms_control_handle = new_create_dissector_handle(dissect_usb_ms_control, proto_usb_ms);
|
|
dissector_add_uint("usb.control", IF_CLASS_MASSTORAGE, usb_ms_control_handle);
|
|
}
|