forked from osmocom/wireshark
1161 lines
36 KiB
C
1161 lines
36 KiB
C
/* Man this is suboptimal.
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* The USB Header and the setup data are BIG ENDIAN
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* but all the real usb data is LITTLE ENDIAN.
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*/
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/* packet-usb.c
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*
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* $Id$
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*
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* usb basic dissector
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* By Paolo Abeni <paolo.abeni@email.com>
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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/prefs.h>
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#include <epan/etypes.h>
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#include <epan/addr_resolv.h>
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#include <epan/emem.h>
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#include <epan/conversation.h>
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#include <string.h>
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/* protocols and header fields */
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static int proto_usb = -1;
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static int hf_usb_urb_type = -1;
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static int hf_usb_device_address = -1;
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static int hf_usb_setup = -1;
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static int hf_usb_endpoint_number = -1;
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static int hf_usb_src_endpoint_number = -1;
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static int hf_usb_dst_endpoint_number = -1;
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static int hf_usb_request = -1;
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static int hf_usb_value = -1;
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static int hf_usb_index = -1;
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static int hf_usb_length = -1;
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static int hf_usb_data = -1;
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static int hf_usb_setup_bmRequestType = -1;
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static int hf_usb_setup_bmRequestType_direction = -1;
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static int hf_usb_setup_bmRequestType_type = -1;
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static int hf_usb_setup_bmRequestType_recipient = -1;
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static int hf_usb_bDescriptorType = -1;
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static int hf_usb_descriptor_index = -1;
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static int hf_usb_language_id = -1;
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static int hf_usb_bLength = -1;
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static int hf_usb_bcdUSB = -1;
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static int hf_usb_bDeviceClass = -1;
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static int hf_usb_bDeviceSubClass = -1;
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static int hf_usb_bDeviceProtocol = -1;
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static int hf_usb_bMaxPacketSize0 = -1;
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static int hf_usb_idVendor = -1;
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static int hf_usb_idProduct = -1;
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static int hf_usb_bcdDevice = -1;
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static int hf_usb_iManufacturer = -1;
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static int hf_usb_iProduct = -1;
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static int hf_usb_iSerialNumber = -1;
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static int hf_usb_bNumConfigurations = -1;
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static int hf_usb_wLANGID = -1;
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static int hf_usb_bString = -1;
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static int hf_usb_bInterfaceNumber = -1;
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static int hf_usb_bAlternateSetting = -1;
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static int hf_usb_bNumEndpoints = -1;
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static int hf_usb_bInterfaceClass = -1;
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static int hf_usb_bInterfaceSubClass = -1;
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static int hf_usb_bInterfaceProtocol = -1;
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static int hf_usb_iInterface = -1;
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static int hf_usb_bEndpointAddress = -1;
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static int hf_usb_bmAttributes = -1;
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static int hf_usb_wMaxPacketSize = -1;
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static int hf_usb_bInterval = -1;
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static int hf_usb_wTotalLength = -1;
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static int hf_usb_bNumInterfaces = -1;
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static int hf_usb_bConfigurationValue = -1;
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static int hf_usb_iConfiguration = -1;
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static int hf_usb_bMaxPower = -1;
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static gint usb_hdr = -1;
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static gint usb_setup_hdr = -1;
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static gint ett_usb_setup_bmrequesttype = -1;
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static gint ett_descriptor_device = -1;
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/* there is one such structure for each device/endpoint conversation */
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typedef struct _usb_conv_info_t {
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emem_tree_t *transactions;
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} usb_conv_info_t;
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/* there is one such structure for each request/response */
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typedef struct _usb_trans_info_t {
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guint32 request_in;
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guint32 response_in;
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guint8 requesttype;
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guint8 request;
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union {
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struct {
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guint8 type;
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guint8 index;
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} get_descriptor;
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};
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} usb_trans_info_t;
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typedef enum {
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URB_CONTROL_INPUT,
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URB_CONTROL_OUTPUT,
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URB_ISOCHRONOUS_INPUT,
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URB_ISOCHRONOUS_OUTPUT,
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URB_INTERRUPT_INPUT,
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URB_INTERRUPT_OUTPUT,
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URB_BULK_INPUT,
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URB_BULK_OUTPUT,
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URB_UNKNOWN
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} urb_type_t;
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typedef struct usb_header {
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guint32 urb_type;
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guint32 device_address;
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guint32 endpoint_number;
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guint32 setup_packet;
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} usb_header_t;
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typedef struct usb_setup {
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guint8 bmRequestType;
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guint8 bRequest;
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guint16 wValue;
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guint16 wIndex;
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guint16 wLength;
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} usb_setup_t;
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static const value_string usb_langid_vals[] = {
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{0x0000, "no language specified"},
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{0x0409, "English (United States)"},
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{0, NULL}
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};
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#define IF_CLASS_MASSTORAGE 0x08
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static const value_string usb_interfaceclass_vals[] = {
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{IF_CLASS_MASSTORAGE, "Mass Storage Class"},
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{0, NULL}
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};
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static const value_string usb_urb_type_vals[] = {
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{URB_CONTROL_INPUT, "URB_CONTROL_INPUT"},
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{URB_CONTROL_OUTPUT,"URB_CONTROL_OUTPUT"},
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{URB_ISOCHRONOUS_INPUT,"URB_ISOCHRONOUS_INPUT"},
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{URB_ISOCHRONOUS_OUTPUT,"URB_ISOCHRONOUS_OUTPUT"},
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{URB_INTERRUPT_INPUT,"URB_INTERRUPT_INPUT"},
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{URB_INTERRUPT_OUTPUT,"URB_INTERRUPT_OUTPUT"},
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{URB_BULK_INPUT,"URB_BULK_INPUT"},
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{URB_BULK_OUTPUT,"URB_BULK_OUTPUT"},
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{URB_UNKNOWN, "URB_UNKNOWN"},
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{0, NULL}
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};
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#define USB_DT_DEVICE 1
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#define USB_DT_CONFIGURATION 2
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#define USB_DT_STRING 3
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#define USB_DT_INTERFACE 4
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#define USB_DT_ENDPOINT 5
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#define USB_DT_DEVICE_QUALIFIER 6
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#define USB_DT_OTHER_SPEED_CONFIGURATION 7
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#define USB_DT_INTERFACE_POWER 8
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static const value_string descriptor_type_vals[] = {
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{USB_DT_DEVICE, "DEVICE"},
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{USB_DT_CONFIGURATION, "CONFIGURATION"},
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{USB_DT_STRING, "STRING"},
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{USB_DT_INTERFACE, "INTERFACE"},
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{USB_DT_ENDPOINT, "ENDPOINT"},
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{USB_DT_DEVICE_QUALIFIER, "DEVICE_QUALIFIER"},
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{USB_DT_OTHER_SPEED_CONFIGURATION, "OTHER_SPEED_CONFIGURATION"},
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{USB_DT_INTERFACE_POWER, "INTERFACE_POWER"},
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{0,NULL}
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};
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static conversation_t *
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get_usb_conversation(packet_info *pinfo)
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{
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conversation_t *conversation;
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/*
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* Do we have a conversation for this connection?
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*/
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conversation = find_conversation(pinfo->fd->num,
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&pinfo->src, &pinfo->dst,
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pinfo->ptype,
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pinfo->srcport, pinfo->destport, 0);
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if(conversation){
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return conversation;
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}
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/* We don't yet have a conversation, so create one. */
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conversation = conversation_new(pinfo->fd->num,
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&pinfo->src, &pinfo->dst,
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pinfo->ptype,
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pinfo->srcport, pinfo->destport, 0);
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return conversation;
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}
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/* SETUP dissectors */
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/*
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* This dissector is used to dissect the setup part and the data
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* for URB_CONTROL_INPUT / GET DESCRIPTOR
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*/
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/* 9.6.2 */
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static int
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dissect_usb_device_qualifier_descriptor(packet_info *pinfo _U_, proto_tree *parent_tree, tvbuff_t *tvb, int offset, usb_trans_info_t *usb_trans_info _U_)
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{
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proto_item *item=NULL;
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proto_tree *tree=NULL;
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int old_offset=offset;
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if(parent_tree){
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item=proto_tree_add_text(parent_tree, tvb, offset, 0, "DEVICE QUALIFIER DESCRIPTOR");
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tree=proto_item_add_subtree(item, ett_descriptor_device);
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}
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/* bLength */
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proto_tree_add_item(tree, hf_usb_bLength, tvb, offset, 1, TRUE);
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offset++;
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/* bDescriptorType */
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proto_tree_add_item(tree, hf_usb_bDescriptorType, tvb, offset, 1, TRUE);
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offset++;
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/* bcdUSB */
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proto_tree_add_item(tree, hf_usb_bcdUSB, tvb, offset, 2, TRUE);
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offset+=2;
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/* bDeviceClass */
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proto_tree_add_item(tree, hf_usb_bDeviceClass, tvb, offset, 1, TRUE);
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offset++;
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/* bDeviceSubClass */
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proto_tree_add_item(tree, hf_usb_bDeviceSubClass, tvb, offset, 1, TRUE);
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offset++;
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/* bDeviceProtocol */
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proto_tree_add_item(tree, hf_usb_bDeviceProtocol, tvb, offset, 1, TRUE);
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offset++;
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/* bMaxPacketSize0 */
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proto_tree_add_item(tree, hf_usb_bMaxPacketSize0, tvb, offset, 1, TRUE);
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offset++;
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/* bNumConfigurations */
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proto_tree_add_item(tree, hf_usb_bNumConfigurations, tvb, offset, 1, TRUE);
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offset++;
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/* one reserved byte */
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offset++;
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if(item){
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proto_item_set_len(item, offset-old_offset);
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}
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return offset;
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}
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/* 9.6.1 */
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static int
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dissect_usb_device_descriptor(packet_info *pinfo _U_, proto_tree *parent_tree, tvbuff_t *tvb, int offset, usb_trans_info_t *usb_trans_info _U_)
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{
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proto_item *item=NULL;
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proto_tree *tree=NULL;
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int old_offset=offset;
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if(parent_tree){
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item=proto_tree_add_text(parent_tree, tvb, offset, 0, "DEVICE DESCRIPTOR");
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tree=proto_item_add_subtree(item, ett_descriptor_device);
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}
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/* bLength */
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proto_tree_add_item(tree, hf_usb_bLength, tvb, offset, 1, TRUE);
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offset++;
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/* bDescriptorType */
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proto_tree_add_item(tree, hf_usb_bDescriptorType, tvb, offset, 1, TRUE);
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offset++;
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/* bcdUSB */
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proto_tree_add_item(tree, hf_usb_bcdUSB, tvb, offset, 2, TRUE);
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offset+=2;
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/* bDeviceClass */
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proto_tree_add_item(tree, hf_usb_bDeviceClass, tvb, offset, 1, TRUE);
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offset++;
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/* bDeviceSubClass */
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proto_tree_add_item(tree, hf_usb_bDeviceSubClass, tvb, offset, 1, TRUE);
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offset++;
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/* bDeviceProtocol */
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proto_tree_add_item(tree, hf_usb_bDeviceProtocol, tvb, offset, 1, TRUE);
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offset++;
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/* bMaxPacketSize0 */
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proto_tree_add_item(tree, hf_usb_bMaxPacketSize0, tvb, offset, 1, TRUE);
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offset++;
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/* idVendor */
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proto_tree_add_item(tree, hf_usb_idVendor, tvb, offset, 2, TRUE);
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offset+=2;
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/* idProduct */
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proto_tree_add_item(tree, hf_usb_idProduct, tvb, offset, 2, TRUE);
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offset+=2;
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/* bcdDevice */
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proto_tree_add_item(tree, hf_usb_bcdDevice, tvb, offset, 2, TRUE);
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offset+=2;
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/* iManufacturer */
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proto_tree_add_item(tree, hf_usb_iManufacturer, tvb, offset, 1, TRUE);
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offset++;
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/* iProduct */
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proto_tree_add_item(tree, hf_usb_iProduct, tvb, offset, 1, TRUE);
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offset++;
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/* iSerialNumber */
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proto_tree_add_item(tree, hf_usb_iSerialNumber, tvb, offset, 1, TRUE);
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offset++;
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/* bNumConfigurations */
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proto_tree_add_item(tree, hf_usb_bNumConfigurations, tvb, offset, 1, TRUE);
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offset++;
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if(item){
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proto_item_set_len(item, offset-old_offset);
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}
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return offset;
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}
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/* 9.6.7 */
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static int
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dissect_usb_string_descriptor(packet_info *pinfo _U_, proto_tree *parent_tree, tvbuff_t *tvb, int offset, usb_trans_info_t *usb_trans_info)
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{
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proto_item *item=NULL;
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proto_tree *tree=NULL;
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int old_offset=offset;
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guint8 len;
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if(parent_tree){
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item=proto_tree_add_text(parent_tree, tvb, offset, 0, "STRING DESCRIPTOR");
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tree=proto_item_add_subtree(item, ett_descriptor_device);
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}
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/* bLength */
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proto_tree_add_item(tree, hf_usb_bLength, tvb, offset, 1, TRUE);
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len=tvb_get_guint8(tvb, offset);
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offset++;
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/* bDescriptorType */
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proto_tree_add_item(tree, hf_usb_bDescriptorType, tvb, offset, 1, TRUE);
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offset++;
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if(!usb_trans_info->get_descriptor.index){
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/* list of languanges */
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while(len>(offset-old_offset)){
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/* wLANGID */
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proto_tree_add_item(tree, hf_usb_wLANGID, tvb, offset, 2, TRUE);
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offset+=2;
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}
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} else {
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char *str;
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/* unicode string */
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str=tvb_get_ephemeral_faked_unicode(tvb, offset, (len-2)/2, TRUE);
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proto_tree_add_string(tree, hf_usb_bString, tvb, offset, len-2, str);
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}
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if(item){
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proto_item_set_len(item, offset-old_offset);
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}
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return offset;
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}
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/* 9.6.5 */
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static int
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dissect_usb_interface_descriptor(packet_info *pinfo _U_, proto_tree *parent_tree, tvbuff_t *tvb, int offset, usb_trans_info_t *usb_trans_info _U_)
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{
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proto_item *item=NULL;
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proto_tree *tree=NULL;
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int old_offset=offset;
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if(parent_tree){
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item=proto_tree_add_text(parent_tree, tvb, offset, 0, "INTERFACE DESCRIPTOR");
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tree=proto_item_add_subtree(item, ett_descriptor_device);
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}
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/* bLength */
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proto_tree_add_item(tree, hf_usb_bLength, tvb, offset, 1, TRUE);
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offset++;
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/* bDescriptorType */
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proto_tree_add_item(tree, hf_usb_bDescriptorType, tvb, offset, 1, TRUE);
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offset++;
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/* bInterfaceNumber */
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proto_tree_add_item(tree, hf_usb_bInterfaceNumber, tvb, offset, 1, TRUE);
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offset++;
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/* bAlternateSetting */
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proto_tree_add_item(tree, hf_usb_bAlternateSetting, tvb, offset, 1, TRUE);
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offset++;
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/* bNumEndpoints */
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proto_tree_add_item(tree, hf_usb_bNumEndpoints, tvb, offset, 1, TRUE);
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offset++;
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/* bInterfaceClass */
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proto_tree_add_item(tree, hf_usb_bInterfaceClass, tvb, offset, 1, TRUE);
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offset++;
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/* bInterfaceSubClass */
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proto_tree_add_item(tree, hf_usb_bInterfaceSubClass, tvb, offset, 1, TRUE);
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offset++;
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/* bInterfaceProtocol */
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proto_tree_add_item(tree, hf_usb_bInterfaceProtocol, tvb, offset, 1, TRUE);
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offset++;
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/* iInterface */
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proto_tree_add_item(tree, hf_usb_iInterface, tvb, offset, 1, TRUE);
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offset++;
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if(item){
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proto_item_set_len(item, offset-old_offset);
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}
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return offset;
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}
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/* 9.6.6 */
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static int
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dissect_usb_endpoint_descriptor(packet_info *pinfo _U_, proto_tree *parent_tree, tvbuff_t *tvb, int offset, usb_trans_info_t *usb_trans_info _U_)
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{
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proto_item *item=NULL;
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proto_tree *tree=NULL;
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int old_offset=offset;
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if(parent_tree){
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item=proto_tree_add_text(parent_tree, tvb, offset, 0, "ENDPOINT DESCRIPTOR");
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tree=proto_item_add_subtree(item, ett_descriptor_device);
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}
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/* bLength */
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proto_tree_add_item(tree, hf_usb_bLength, tvb, offset, 1, TRUE);
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offset++;
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/* bDescriptorType */
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proto_tree_add_item(tree, hf_usb_bDescriptorType, tvb, offset, 1, TRUE);
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offset++;
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/* bEndpointAddress */
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proto_tree_add_item(tree, hf_usb_bEndpointAddress, tvb, offset, 1, TRUE);
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offset++;
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/* bmAttributes */
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proto_tree_add_item(tree, hf_usb_bmAttributes, tvb, offset, 1, TRUE);
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offset++;
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/* wMaxPacketSize */
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proto_tree_add_item(tree, hf_usb_wMaxPacketSize, tvb, offset, 2, TRUE);
|
|
offset+=2;
|
|
|
|
/* bInterval */
|
|
proto_tree_add_item(tree, hf_usb_bInterval, tvb, offset, 1, TRUE);
|
|
offset++;
|
|
|
|
if(item){
|
|
proto_item_set_len(item, offset-old_offset);
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
/* 9.6.3 */
|
|
static int
|
|
dissect_usb_configuration_descriptor(packet_info *pinfo _U_, proto_tree *parent_tree, tvbuff_t *tvb, int offset, usb_trans_info_t *usb_trans_info)
|
|
{
|
|
proto_item *item=NULL;
|
|
proto_tree *tree=NULL;
|
|
int old_offset=offset;
|
|
guint16 len;
|
|
|
|
if(parent_tree){
|
|
item=proto_tree_add_text(parent_tree, tvb, offset, 0, "CONFIGURATION DESCRIPTOR");
|
|
tree=proto_item_add_subtree(item, ett_descriptor_device);
|
|
}
|
|
|
|
/* bLength */
|
|
proto_tree_add_item(tree, hf_usb_bLength, tvb, offset, 1, TRUE);
|
|
offset++;
|
|
|
|
/* bDescriptorType */
|
|
proto_tree_add_item(tree, hf_usb_bDescriptorType, tvb, offset, 1, TRUE);
|
|
offset++;
|
|
|
|
/* wTotalLength */
|
|
proto_tree_add_item(tree, hf_usb_wTotalLength, tvb, offset, 2, TRUE);
|
|
len=tvb_get_letohs(tvb, offset);
|
|
offset+=2;
|
|
|
|
/* bNumInterfaces */
|
|
proto_tree_add_item(tree, hf_usb_bNumInterfaces, tvb, offset, 1, TRUE);
|
|
offset++;
|
|
|
|
/* bConfigurationValue */
|
|
proto_tree_add_item(tree, hf_usb_bConfigurationValue, tvb, offset, 1, TRUE);
|
|
offset++;
|
|
|
|
/* iConfiguration */
|
|
proto_tree_add_item(tree, hf_usb_iConfiguration, tvb, offset, 1, TRUE);
|
|
offset++;
|
|
|
|
/* bmAttributes */
|
|
proto_tree_add_item(tree, hf_usb_bmAttributes, tvb, offset, 1, TRUE);
|
|
offset++;
|
|
|
|
/* bMaxPower */
|
|
proto_tree_add_item(tree, hf_usb_bMaxPower, tvb, offset, 1, TRUE);
|
|
offset++;
|
|
|
|
/* decode any additional interface and endpoint descriptors */
|
|
while(len>(old_offset-offset)){
|
|
guint8 next_type;
|
|
|
|
if(tvb_length_remaining(tvb, offset)<2){
|
|
break;
|
|
}
|
|
next_type=tvb_get_guint8(tvb, offset+1);
|
|
switch(next_type){
|
|
case USB_DT_INTERFACE:
|
|
offset=dissect_usb_interface_descriptor(pinfo, parent_tree, tvb, offset, usb_trans_info);
|
|
break;
|
|
case USB_DT_ENDPOINT:
|
|
offset=dissect_usb_endpoint_descriptor(pinfo, parent_tree, tvb, offset, usb_trans_info);
|
|
break;
|
|
default:
|
|
return offset;
|
|
}
|
|
}
|
|
|
|
if(item){
|
|
proto_item_set_len(item, offset-old_offset);
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
|
|
static void
|
|
dissect_usb_setup_get_descriptor(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gboolean is_request, usb_trans_info_t *usb_trans_info)
|
|
{
|
|
if(is_request){
|
|
/* descriptor type */
|
|
proto_tree_add_item(tree, hf_usb_bDescriptorType, tvb, offset, 1, FALSE);
|
|
usb_trans_info->get_descriptor.type=tvb_get_guint8(tvb, offset);
|
|
offset++;
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " %s",
|
|
val_to_str(usb_trans_info->get_descriptor.type, descriptor_type_vals, "Unknown type %x"));
|
|
}
|
|
|
|
/* descriptor index */
|
|
proto_tree_add_item(tree, hf_usb_descriptor_index, tvb, offset, 1, FALSE);
|
|
usb_trans_info->get_descriptor.index=tvb_get_guint8(tvb, offset);
|
|
offset++;
|
|
|
|
/* language id */
|
|
proto_tree_add_item(tree, hf_usb_language_id, tvb, offset, 2, FALSE);
|
|
offset+=2;
|
|
|
|
/* length */
|
|
proto_tree_add_item(tree, hf_usb_length, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
} else {
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " %s",
|
|
val_to_str(usb_trans_info->get_descriptor.type, descriptor_type_vals, "Unknown type %x"));
|
|
}
|
|
switch(usb_trans_info->get_descriptor.type){
|
|
case USB_DT_DEVICE:
|
|
offset=dissect_usb_device_descriptor(pinfo, tree, tvb, offset, usb_trans_info);
|
|
break;
|
|
case USB_DT_CONFIGURATION:
|
|
offset=dissect_usb_configuration_descriptor(pinfo, tree, tvb, offset, usb_trans_info);
|
|
break;
|
|
case USB_DT_STRING:
|
|
offset=dissect_usb_string_descriptor(pinfo, tree, tvb, offset, usb_trans_info);
|
|
break;
|
|
case USB_DT_INTERFACE:
|
|
offset=dissect_usb_interface_descriptor(pinfo, tree, tvb, offset, usb_trans_info);
|
|
break;
|
|
case USB_DT_ENDPOINT:
|
|
offset=dissect_usb_endpoint_descriptor(pinfo, tree, tvb, offset, usb_trans_info);
|
|
break;
|
|
case USB_DT_DEVICE_QUALIFIER:
|
|
offset=dissect_usb_device_qualifier_descriptor(pinfo, tree, tvb, offset, usb_trans_info);
|
|
break;
|
|
default:
|
|
/* XXX dissect the descriptor coming back from the device */
|
|
proto_tree_add_text(tree, tvb, offset, tvb_length_remaining(tvb, offset), "get descriptor data...");
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
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);
|
|
|
|
typedef struct _usb_setup_dissector_table_t {
|
|
guint8 request;
|
|
usb_setup_dissector dissector;
|
|
} usb_setup_dissector_table_t;
|
|
#define USB_SETUP_GET_DESCRIPTOR 6
|
|
static const usb_setup_dissector_table_t setup_dissectors[] = {
|
|
{USB_SETUP_GET_DESCRIPTOR, dissect_usb_setup_get_descriptor},
|
|
{0, NULL}
|
|
};
|
|
static const value_string setup_request_names_vals[] = {
|
|
{USB_SETUP_GET_DESCRIPTOR, "GET DESCRIPTOR"},
|
|
{0, NULL}
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static const true_false_string tfs_bmrequesttype_direction = {
|
|
"Device-to-host",
|
|
"Host-to-device"
|
|
};
|
|
static const value_string bmrequesttype_type_vals[] = {
|
|
{0, "Standard"},
|
|
{1, "Class"},
|
|
{2, "Vendor"},
|
|
{3, "Reserved"},
|
|
{0, NULL}
|
|
};
|
|
static const value_string bmrequesttype_recipient_vals[] = {
|
|
{0, "Device"},
|
|
{1, "Interface"},
|
|
{2, "Endpoint"},
|
|
{3, "Other"},
|
|
{0, NULL}
|
|
};
|
|
|
|
static int
|
|
dissect_usb_setup_bmrequesttype(proto_tree *parent_tree, tvbuff_t *tvb, int offset)
|
|
{
|
|
proto_item *item=NULL;
|
|
proto_tree *tree=NULL;
|
|
|
|
if(parent_tree){
|
|
item=proto_tree_add_item(parent_tree, hf_usb_setup_bmRequestType, tvb, offset, 1, TRUE);
|
|
tree = proto_item_add_subtree(item, ett_usb_setup_bmrequesttype);
|
|
}
|
|
|
|
proto_tree_add_item(tree, hf_usb_setup_bmRequestType_direction, tvb, offset, 1, TRUE);
|
|
proto_tree_add_item(tree, hf_usb_setup_bmRequestType_type, tvb, offset, 1, TRUE);
|
|
proto_tree_add_item(tree, hf_usb_setup_bmRequestType_recipient, tvb, offset, 1, TRUE);
|
|
|
|
offset++;
|
|
return offset;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
dissect_usb(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent)
|
|
{
|
|
int offset = 0;
|
|
int type, endpoint;
|
|
gboolean setup;
|
|
proto_tree *tree = NULL;
|
|
static guint32 src_addr, dst_addr, tmp_addr; /* has to be static due to SET_ADDRESS */
|
|
guint32 src_port, dst_port;
|
|
gboolean is_request;
|
|
usb_conv_info_t *usb_conv_info;
|
|
conversation_t *conversation;
|
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "USB");
|
|
|
|
/* add usb hdr*/
|
|
if (parent) {
|
|
proto_item *ti = NULL;
|
|
ti = proto_tree_add_protocol_format(parent, proto_usb, tvb, 0, sizeof(usb_header_t), "USB URB");
|
|
|
|
tree = proto_item_add_subtree(ti, usb_hdr);
|
|
}
|
|
|
|
|
|
type = tvb_get_ntohl(tvb, offset);
|
|
proto_tree_add_item(tree, hf_usb_urb_type, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "%s",
|
|
val_to_str(type, usb_urb_type_vals, "Unknown type %x"));
|
|
}
|
|
|
|
#define USB_ADDR_LEN 4
|
|
proto_tree_add_item(tree, hf_usb_device_address, tvb, offset, 4, FALSE);
|
|
tmp_addr=tvb_get_ntohl(tvb, offset);
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(tree, hf_usb_endpoint_number, tvb, offset, 4, FALSE);
|
|
endpoint=tvb_get_ntohl(tvb, offset);
|
|
offset += 4;
|
|
|
|
/* check for setup hdr presence */
|
|
proto_tree_add_item(tree, hf_usb_setup, tvb, offset, 4, FALSE);
|
|
setup = tvb_get_ntohl(tvb, offset);
|
|
offset += 4;
|
|
|
|
|
|
/* set up addresses and ports */
|
|
switch(type){
|
|
case URB_CONTROL_INPUT:
|
|
/* CONTROL INPUT packets are requests if they contain a "setup"
|
|
* blob and responses othervise
|
|
*/
|
|
if(setup){
|
|
src_addr=0xffffffff;
|
|
dst_addr=tmp_addr;
|
|
src_port=0xffff;
|
|
dst_port=endpoint;
|
|
is_request=TRUE;
|
|
} else {
|
|
src_addr=tmp_addr;
|
|
dst_addr=0xffffffff;
|
|
src_port=endpoint;
|
|
dst_port=0xffff;
|
|
is_request=FALSE;
|
|
}
|
|
break;
|
|
default:
|
|
/* dont know */
|
|
src_addr=0xffffffff;
|
|
dst_addr=0xffffffff;
|
|
src_port=0xffff;
|
|
dst_port=0xffff;
|
|
is_request=FALSE;
|
|
}
|
|
SET_ADDRESS(&pinfo->net_src, AT_USB, USB_ADDR_LEN, (char *)&src_addr);
|
|
SET_ADDRESS(&pinfo->src, AT_USB, USB_ADDR_LEN, (char *)&src_addr);
|
|
SET_ADDRESS(&pinfo->net_dst, AT_USB, USB_ADDR_LEN, (char *)&dst_addr);
|
|
SET_ADDRESS(&pinfo->dst, AT_USB, USB_ADDR_LEN, (char *)&dst_addr);
|
|
pinfo->ptype=PT_USB;
|
|
pinfo->srcport=src_port;
|
|
pinfo->destport=dst_port;
|
|
|
|
|
|
conversation=get_usb_conversation(pinfo);
|
|
|
|
/* do we have conversation specific data ? */
|
|
usb_conv_info = conversation_get_proto_data(conversation, proto_usb);
|
|
if(!usb_conv_info){
|
|
/* no not yet so create some */
|
|
usb_conv_info = se_alloc(sizeof(usb_conv_info_t));
|
|
usb_conv_info->transactions=se_tree_create_non_persistent(EMEM_TREE_TYPE_RED_BLACK, "usb transactions");
|
|
|
|
conversation_add_proto_data(conversation, proto_usb, usb_conv_info);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
switch(type){
|
|
case URB_CONTROL_INPUT:
|
|
{
|
|
const usb_setup_dissector_table_t *tmp;
|
|
usb_setup_dissector dissector;
|
|
proto_item *ti = NULL;
|
|
proto_tree *setup_tree = NULL;
|
|
guint8 requesttype, request;
|
|
usb_trans_info_t *usb_trans_info;
|
|
|
|
if(is_request){
|
|
/* this is a request */
|
|
ti = proto_tree_add_protocol_format(tree, proto_usb, tvb, offset, sizeof(usb_setup_t), "URB setup");
|
|
setup_tree = proto_item_add_subtree(ti, usb_setup_hdr);
|
|
requesttype=tvb_get_guint8(tvb, offset);
|
|
offset=dissect_usb_setup_bmrequesttype(setup_tree, tvb, offset);
|
|
|
|
request=tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(setup_tree, hf_usb_request, tvb, offset, 1, TRUE);
|
|
offset += 1;
|
|
|
|
usb_trans_info=se_tree_lookup32(usb_conv_info->transactions, pinfo->fd->num);
|
|
if(!usb_trans_info){
|
|
usb_trans_info=se_alloc(sizeof(usb_trans_info_t));
|
|
usb_trans_info->request_in=pinfo->fd->num;
|
|
usb_trans_info->response_in=0;
|
|
usb_trans_info->requesttype=requesttype;
|
|
usb_trans_info->request=request;
|
|
se_tree_insert32(usb_conv_info->transactions, pinfo->fd->num, usb_trans_info);
|
|
}
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "%s Request",
|
|
val_to_str(usb_trans_info->request, setup_request_names_vals, "Unknown type %x"));
|
|
}
|
|
|
|
dissector=NULL;
|
|
for(tmp=setup_dissectors;tmp->dissector;tmp++){
|
|
if(tmp->request==request){
|
|
dissector=tmp->dissector;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(dissector){
|
|
dissector(pinfo, setup_tree, tvb, offset, is_request, usb_trans_info);
|
|
offset+=6;
|
|
} else {
|
|
proto_tree_add_item(setup_tree, hf_usb_value, tvb, offset, 2, TRUE);
|
|
offset += 2;
|
|
proto_tree_add_item(setup_tree, hf_usb_index, tvb, offset, 2, TRUE);
|
|
offset += 2;
|
|
proto_tree_add_item(setup_tree, hf_usb_length, tvb, offset, 2, TRUE);
|
|
offset += 2;
|
|
}
|
|
} else {
|
|
/* this is a response */
|
|
if(pinfo->fd->flags.visited){
|
|
usb_trans_info=se_tree_lookup32(usb_conv_info->transactions, pinfo->fd->num);
|
|
} else {
|
|
usb_trans_info=se_tree_lookup32_le(usb_conv_info->transactions, pinfo->fd->num);
|
|
if(usb_trans_info){
|
|
usb_trans_info->response_in=pinfo->fd->num;
|
|
se_tree_insert32(usb_conv_info->transactions, pinfo->fd->num, usb_trans_info);
|
|
}
|
|
}
|
|
if(usb_trans_info){
|
|
dissector=NULL;
|
|
for(tmp=setup_dissectors;tmp->dissector;tmp++){
|
|
if(tmp->request==usb_trans_info->request){
|
|
dissector=tmp->dissector;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "%s Response",
|
|
val_to_str(usb_trans_info->request, setup_request_names_vals, "Unknown type %x"));
|
|
}
|
|
|
|
if(dissector){
|
|
dissector(pinfo, tree, tvb, offset, is_request, usb_trans_info);
|
|
}
|
|
} else {
|
|
/* could not find a matching request */
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
break;
|
|
default:
|
|
/* dont know */
|
|
;
|
|
}
|
|
|
|
|
|
if (setup) {
|
|
proto_item *ti = NULL;
|
|
proto_tree *setup_tree = NULL;
|
|
guint8 requesttype, request;
|
|
|
|
ti = proto_tree_add_protocol_format(tree, proto_usb, tvb, offset, sizeof(usb_setup_t), "URB setup");
|
|
setup_tree = proto_item_add_subtree(ti, usb_setup_hdr);
|
|
|
|
|
|
requesttype=tvb_get_guint8(tvb, offset);
|
|
offset=dissect_usb_setup_bmrequesttype(setup_tree, tvb, offset);
|
|
|
|
request=tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(setup_tree, hf_usb_request, tvb, offset, 1, TRUE);
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(tree, hf_usb_value, tvb, offset, 2, TRUE);
|
|
offset += 2;
|
|
proto_tree_add_item(tree, hf_usb_index, tvb, offset, 2, TRUE);
|
|
offset += 2;
|
|
proto_tree_add_item(tree, hf_usb_length, tvb, offset, 2, TRUE);
|
|
offset += 2;
|
|
}
|
|
|
|
proto_tree_add_item(tree, hf_usb_data, tvb,
|
|
offset, tvb_length_remaining(tvb, offset), TRUE);
|
|
}
|
|
|
|
void
|
|
proto_register_usb(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
|
|
{ &hf_usb_urb_type,
|
|
{ "URB type", "usb.urb_type", FT_UINT32, BASE_DEC,
|
|
VALS(usb_urb_type_vals), 0x0,
|
|
"URB type", HFILL }},
|
|
|
|
{ &hf_usb_device_address,
|
|
{ "Device", "usb.device_address", FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"USB device address", HFILL }},
|
|
|
|
{ &hf_usb_setup,
|
|
{ "Setup", "usb.setup", FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"USB setup", HFILL }},
|
|
|
|
{ &hf_usb_endpoint_number,
|
|
{ "Endpoint", "usb.endpoint_number", FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"usb endpoint number", HFILL }},
|
|
|
|
{ &hf_usb_src_endpoint_number,
|
|
{ "Src Endpoint", "usb.src.endpoint", FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"src usb endpoint number", HFILL }},
|
|
|
|
{ &hf_usb_dst_endpoint_number,
|
|
{ "Dst Endpoint", "usb.dst.endpoint", FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"dst usb endpoint number", HFILL }},
|
|
|
|
{ &hf_usb_setup_bmRequestType,
|
|
{ "bmRequestType", "usb.setup.bmRequestType", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_usb_request,
|
|
{ "bRequest", "usb.setup.bRequest", FT_UINT8, BASE_HEX, VALS(setup_request_names_vals), 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_usb_value,
|
|
{ "wValue", "usb.setup.wValue", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_usb_index,
|
|
{ "wIndex", "usb.setup.wIndex", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_usb_length,
|
|
{ "wLength", "usb.setup.wLength", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_usb_data,
|
|
{"Application Data", "usb.data",
|
|
FT_BYTES, BASE_HEX, NULL, 0x0,
|
|
"Payload is application data", HFILL }},
|
|
|
|
{ &hf_usb_setup_bmRequestType_direction,
|
|
{ "Direction", "usb.setup.bmRequestType.direction", FT_BOOLEAN, 8,
|
|
TFS(&tfs_bmrequesttype_direction), 0x80, "", HFILL }},
|
|
|
|
{ &hf_usb_setup_bmRequestType_type,
|
|
{ "Type", "usb.setup.bmRequestType.type", FT_UINT8, BASE_HEX,
|
|
VALS(bmrequesttype_type_vals), 0x70, "", HFILL }},
|
|
|
|
{ &hf_usb_setup_bmRequestType_recipient,
|
|
{ "Recipient", "usb.setup.bmRequestType.recipient", FT_UINT8, BASE_HEX,
|
|
VALS(bmrequesttype_recipient_vals), 0x0f, "", HFILL }},
|
|
|
|
{ &hf_usb_bDescriptorType,
|
|
{ "bDescriptorType", "usb.bDescriptorType", FT_UINT8, BASE_HEX,
|
|
VALS(descriptor_type_vals), 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_descriptor_index,
|
|
{ "Descriptor Index", "usb.DescriptorIndex", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_language_id,
|
|
{ "Language Id", "usb.LanguageId", FT_UINT16, BASE_HEX,
|
|
VALS(usb_langid_vals), 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bLength,
|
|
{ "bLength", "usb.bLength", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bcdUSB,
|
|
{ "bcdUSB", "usb.bcdUSB", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bDeviceClass,
|
|
{ "bDeviceClass", "usb.bDeviceClass", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bDeviceSubClass,
|
|
{ "bDeviceSubClass", "usb.bDeviceSubClass", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bDeviceProtocol,
|
|
{ "bDeviceProtocol", "usb.bDeviceProtocol", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bMaxPacketSize0,
|
|
{ "bMaxPacketSize0", "usb.bMaxPacketSize0", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_idVendor,
|
|
{ "idVendor", "usb.idVendor", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_idProduct,
|
|
{ "idProduct", "usb.idProduct", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bcdDevice,
|
|
{ "bcdDevice", "usb.bcdDevice", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_iManufacturer,
|
|
{ "iManufacturer", "usb.iManufacturer", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_iProduct,
|
|
{ "iProduct", "usb.iProduct", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_iSerialNumber,
|
|
{ "iSerialNumber", "usb.iSerialNumber", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bNumConfigurations,
|
|
{ "bNumConfigurations", "usb.bNumConfigurations", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_wLANGID,
|
|
{ "wLANGID", "usb.wLANGID", FT_UINT16, BASE_HEX,
|
|
VALS(usb_langid_vals), 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bString,
|
|
{ "bString", "usb.bString", FT_STRING, BASE_NONE,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bInterfaceNumber,
|
|
{ "bInterfaceNumber", "usb.bInterfaceNumber", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bAlternateSetting,
|
|
{ "bAlternateSetting","usb.bAlternateSetting", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bNumEndpoints,
|
|
{ "bNumEndpoints","usb.bNumEndpoints", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bInterfaceClass,
|
|
{ "bInterfaceClass", "usb.bInterfaceClass", FT_UINT8, BASE_HEX,
|
|
VALS(usb_interfaceclass_vals), 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bInterfaceSubClass,
|
|
{ "bInterfaceSubClass", "usb.bInterfaceSubClass", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bInterfaceProtocol,
|
|
{ "bInterfaceProtocol", "usb.bInterfaceProtocol", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_iInterface,
|
|
{ "iInterface", "usb.iInterface", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bEndpointAddress,
|
|
{ "bEndpointAddress", "usb.bEndpointAddress", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bmAttributes,
|
|
{ "bmAttributes", "usb.bmAttributes", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_wMaxPacketSize,
|
|
{ "wMaxPacketSize", "usb.wMaxPacketSize", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bInterval,
|
|
{ "bInterval", "usb.bInterval", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_wTotalLength,
|
|
{ "wTotalLength", "usb.wTotalLength", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bNumInterfaces,
|
|
{ "bNumInterfaces", "usb.bNumInterfaces", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bConfigurationValue,
|
|
{ "bConfigurationValue", "usb.bConfigurationValue", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_iConfiguration,
|
|
{ "iConfiguration", "usb.iConfiguration", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{ &hf_usb_bMaxPower,
|
|
{ "bMaxPower", "usb.bMaxPower", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
};
|
|
|
|
static gint *usb_subtrees[] = {
|
|
&usb_hdr,
|
|
&usb_setup_hdr,
|
|
&ett_usb_setup_bmrequesttype,
|
|
&ett_descriptor_device
|
|
};
|
|
|
|
|
|
proto_usb = proto_register_protocol("USB", "USB", "usb");
|
|
proto_register_field_array(proto_usb, hf, array_length(hf));
|
|
proto_register_subtree_array(usb_subtrees, array_length(usb_subtrees));
|
|
|
|
register_dissector("usb", dissect_usb, proto_usb);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_usb(void)
|
|
{
|
|
dissector_handle_t usb_handle;
|
|
usb_handle = create_dissector_handle(dissect_usb, proto_usb);
|
|
|
|
dissector_add("wtap_encap", WTAP_ENCAP_USB, usb_handle);
|
|
}
|