2006-10-10 21:00:35 +00:00
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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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*
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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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2006-10-14 05:02:40 +00:00
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#include <string.h>
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2006-10-10 21:00:35 +00:00
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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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2006-10-10 21:46:44 +00:00
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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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2006-10-10 21:00:35 +00:00
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} usb_header_t;
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typedef struct usb_setup {
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2006-10-11 09:47:27 +00:00
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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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2006-10-10 21:00:35 +00:00
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} usb_setup_t;
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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_endpoint_number = -1;
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static int hf_usb_request_type = -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 gint usb_hdr = -1;
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static gint usb_setup_hdr = -1;
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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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static void
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dissect_usb(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent)
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{
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int offset = 0;
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int type;
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gboolean setup;
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proto_tree *tree = NULL;
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2006-10-14 05:02:40 +00:00
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static guint32 src_addr=0xffffffff, dst_addr=0xffffffff; /* has to be static due to SET_ADDRESS */
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guint32 tmpaddr;
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2006-10-10 21:00:35 +00:00
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "USB");
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/* add usb hdr*/
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if (parent) {
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proto_item *ti = NULL;
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ti = proto_tree_add_protocol_format(parent, proto_usb, tvb, 0, sizeof(usb_header_t), "USB URB");
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tree = proto_item_add_subtree(ti, usb_hdr);
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}
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type = tvb_get_ntohl(tvb, offset);
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proto_tree_add_item(tree, hf_usb_urb_type, tvb, offset, 4, FALSE);
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offset += 4;
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2006-10-14 05:02:40 +00:00
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#define USB_ADDR_LEN 4
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2006-10-10 21:00:35 +00:00
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proto_tree_add_item(tree, hf_usb_device_address, tvb, offset, 4, FALSE);
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2006-10-14 05:02:40 +00:00
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switch(type){
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case URB_CONTROL_INPUT:
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case URB_ISOCHRONOUS_INPUT:
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case URB_INTERRUPT_INPUT:
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case URB_BULK_INPUT:
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src_addr=tvb_get_ntohl(tvb, offset);
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break;
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case URB_CONTROL_OUTPUT:
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case URB_ISOCHRONOUS_OUTPUT:
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case URB_INTERRUPT_OUTPUT:
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case URB_BULK_OUTPUT:
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dst_addr=tvb_get_ntohl(tvb, offset);
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break;
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default:
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break;
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}
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2006-10-10 21:00:35 +00:00
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offset += 4;
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2006-10-14 05:02:40 +00:00
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SET_ADDRESS(&pinfo->net_src, AT_USB, USB_ADDR_LEN, (char *)&src_addr);
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SET_ADDRESS(&pinfo->src, AT_USB, USB_ADDR_LEN, (char *)&src_addr);
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SET_ADDRESS(&pinfo->net_dst, AT_USB, USB_ADDR_LEN, (char *)&dst_addr);
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SET_ADDRESS(&pinfo->dst, AT_USB, USB_ADDR_LEN, (char *)&dst_addr);
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2006-10-10 21:00:35 +00:00
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proto_tree_add_item(tree, hf_usb_endpoint_number, tvb, offset, 4, FALSE);
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offset += 4;
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/* check for setup hdr presence */
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setup = tvb_get_ntohl(tvb, offset);
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offset += 4;
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if (setup)
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{
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proto_item *ti = NULL;
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proto_tree *setup_tree = NULL;
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ti = proto_tree_add_protocol_format(parent, proto_usb, tvb, offset, sizeof(usb_setup_t), "URB setup");
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setup_tree = proto_item_add_subtree(ti, usb_setup_hdr);
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2006-10-12 08:04:11 +00:00
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proto_tree_add_item(setup_tree, hf_usb_request_type, tvb, offset, 1, FALSE);
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offset += 1;
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proto_tree_add_item(setup_tree, hf_usb_request, tvb, offset, 1, FALSE);
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offset += 1;
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proto_tree_add_item(setup_tree, hf_usb_value, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(setup_tree, hf_usb_index, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(setup_tree, hf_usb_length, tvb, offset, 2, FALSE);
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offset += 2;
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2006-10-10 21:00:35 +00:00
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}
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proto_tree_add_item(tree, hf_usb_data, tvb,
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offset, tvb_length_remaining(tvb, offset), FALSE);
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}
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void
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proto_register_usb(void)
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{
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static hf_register_info hf[] = {
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{ &hf_usb_urb_type,
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{ "URB type", "usb.urb_type", FT_UINT32, BASE_DEC,
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VALS(usb_urb_type_vals), 0x0,
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"URB type", HFILL }},
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{ &hf_usb_device_address,
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{ "Device", "usb.device_address", FT_UINT32, BASE_DEC, NULL, 0x0,
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"USB device address", HFILL }},
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{ &hf_usb_endpoint_number,
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{ "Endpoint", "usb.endpoint_number", FT_UINT32, BASE_DEC, NULL, 0x0,
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"usb endpoint number", HFILL }},
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{ &hf_usb_request_type,
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2006-10-11 09:47:27 +00:00
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{ "Request Type", "usb.setup.request_type", FT_UINT8, BASE_HEX, NULL, 0x0,
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2006-10-10 21:00:35 +00:00
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"", HFILL }},
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{ &hf_usb_request,
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2006-10-11 09:47:27 +00:00
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{ "Request", "usb.setup.request", FT_UINT8, BASE_HEX, NULL, 0x0,
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2006-10-10 21:00:35 +00:00
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"", HFILL }},
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{ &hf_usb_value,
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2006-10-11 09:47:27 +00:00
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{ "value", "usb.setup.value", FT_UINT16, BASE_HEX, NULL, 0x0,
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2006-10-10 21:00:35 +00:00
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"", HFILL }},
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{ &hf_usb_index,
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2006-10-11 09:47:27 +00:00
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{ "Index", "usb.setup.index", FT_UINT16, BASE_DEC, NULL, 0x0,
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2006-10-10 21:00:35 +00:00
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"", HFILL }},
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{ &hf_usb_length,
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2006-10-11 09:47:27 +00:00
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{ "Length", "usb.setup.length", FT_UINT16, BASE_DEC, NULL, 0x0,
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2006-10-10 21:00:35 +00:00
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"", HFILL }},
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{ &hf_usb_data,
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{"Application Data", "usb.data",
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FT_BYTES, BASE_HEX, NULL, 0x0,
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"Payload is application data", HFILL }}
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};
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static gint *usb_subtrees[] = {
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&usb_hdr,
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&usb_setup_hdr
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};
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proto_usb = proto_register_protocol("USB", "USB", "usb");
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proto_register_field_array(proto_usb, hf, array_length(hf));
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proto_register_subtree_array(usb_subtrees, array_length(usb_subtrees));
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register_dissector("eth", dissect_usb, proto_usb);
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}
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void
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proto_reg_handoff_usb(void)
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{
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dissector_handle_t usb_handle;
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usb_handle = create_dissector_handle(dissect_usb, proto_usb);
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dissector_add("wtap_encap", WTAP_ENCAP_USB, usb_handle);
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}
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