![Guy Harris](/assets/img/avatar_default.png)
static, and add a new "packet-data.h" to declare "proto_data". Display escape sequences in octal in the IAPP dissector, as is now done in the RADIUS dissector. svn path=/trunk/; revision=5441
567 lines
15 KiB
C
567 lines
15 KiB
C
/* packet-iapp.c
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* Routines for IAPP dissection
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* Copyright 2002, Alfred Arnold <aarnold@elsa.de>
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*
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* $Id: packet-iapp.c,v 1.3 2002/05/10 23:20:38 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* is a dissector file; if you just copied this from README.developer,
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* don't bother with the "Copied from" - you don't even need to put
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* in a "Copied from" if you copied an existing dissector, especially
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* if the bulk of the code in the new dissector is your code)
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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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#include <glib.h>
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#ifdef NEED_SNPRINTF_H
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# include "snprintf.h"
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#endif
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#include <epan/packet.h>
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#include "oui.h"
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/* Initialize the protocol and registered fields */
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static int proto_iapp = -1;
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static int hf_iapp_version = -1;
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static int hf_iapp_type = -1;
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/* Initialize the subtree pointers */
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static gint ett_iapp = -1;
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static gint ett_iapp_pdu = -1;
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static gint ett_iapp_cap = -1;
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static gint ett_iapp_auth = -1;
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#define UDP_PORT_IAPP 2313
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#define IAPP_ANNOUNCE_REQUEST 0
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#define IAPP_ANNOUNCE_RESPONSE 1
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#define IAPP_HANDOVER_REQUEST 2
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#define IAPP_HANDOVER_RESPONSE 3
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#define IAPP_PDU_SSID 0
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#define IAPP_PDU_BSSID 1
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#define IAPP_PDU_OLDBSSID 2
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#define IAPP_PDU_MSADDR 3
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#define IAPP_PDU_CAPABILITY 4
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#define IAPP_PDU_ANNOUNCEINT 5
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#define IAPP_PDU_HOTIMEOUT 6
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#define IAPP_PDU_MESSAGEID 7
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#define IAPP_PDU_PHYTYPE 0x10
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#define IAPP_PDU_REGDOMAIN 0x11
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#define IAPP_PDU_CHANNEL 0x12
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#define IAPP_PDU_BEACONINT 0x13
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#define IAPP_PDU_OUIIDENT 0x80
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#define IAPP_PDU_AUTHINFO 0x81
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#define IAPP_CAP_FORWARDING 0x40
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#define IAPP_CAP_WEP 0x20
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#define IAPP_PHY_PROP 0x00
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#define IAPP_PHY_FHSS 0x01
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#define IAPP_PHY_DSSS 0x02
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#define IAPP_PHY_IR 0x03
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#define IAPP_PHY_OFDM 0x04
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#define IAPP_DOM_FCC 0x10
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#define IAPP_DOM_IC 0x20
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#define IAPP_DOM_ETSI 0x30
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#define IAPP_DOM_SPAIN 0x31
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#define IAPP_DOM_FRANCE 0x32
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#define IAPP_DOM_MKK 0x40
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#define IAPP_AUTH_STATUS 0x01
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#define IAPP_AUTH_USERNAME 0x02
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#define IAPP_AUTH_PROVNAME 0x03
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#define IAPP_AUTH_RXPKTS 0x04
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#define IAPP_AUTH_TXPKTS 0x05
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#define IAPP_AUTH_RXBYTES 0x06
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#define IAPP_AUTH_TXBYTES 0x07
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#define IAPP_AUTH_LOGINTIME 0x08
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#define IAPP_AUTH_TIMELIMIT 0x09
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#define IAPP_AUTH_VOLLIMIT 0x0a
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#define IAPP_AUTH_ACCCYCLE 0x0b
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#define IAPP_AUTH_RXGWORDS 0x0c
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#define IAPP_AUTH_TXGWORDS 0x0d
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#define IAPP_AUTH_IPADDR 0x0e
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#define IAPP_AUTH_TRAILER 0xff
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typedef struct _e_iapphdr {
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guint8 ia_version;
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guint8 ia_type;
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} e_iapphdr;
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typedef struct _e_pduhdr {
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guint8 pdu_type;
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guint8 pdu_len_h;
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guint8 pdu_len_l;
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} e_pduhdr;
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static value_string iapp_vals[] = {
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{IAPP_ANNOUNCE_REQUEST, "Announce Request"},
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{IAPP_ANNOUNCE_RESPONSE, "Announce Response"},
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{IAPP_HANDOVER_REQUEST, "Handover Request"},
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{IAPP_HANDOVER_RESPONSE, "Handover Response"},
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{0, NULL}};
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static value_string iapp_pdu_type_vals[] = {
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{IAPP_PDU_SSID, "Network Name"},
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{IAPP_PDU_BSSID, "BSSID"},
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{IAPP_PDU_OLDBSSID, "Old BSSID"},
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{IAPP_PDU_MSADDR, "Mobile Station Address"},
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{IAPP_PDU_CAPABILITY, "Capabilities"},
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{IAPP_PDU_ANNOUNCEINT, "Announce Interval"},
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{IAPP_PDU_HOTIMEOUT, "Handover Timeout"},
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{IAPP_PDU_MESSAGEID, "Message ID"},
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{IAPP_PDU_PHYTYPE, "PHY Type"},
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{IAPP_PDU_REGDOMAIN, "Regulatory Domain"},
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{IAPP_PDU_CHANNEL, "Radio Channel"},
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{IAPP_PDU_BEACONINT, "Beacon Interval"},
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{IAPP_PDU_OUIIDENT, "OUI Identifier"},
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{IAPP_PDU_AUTHINFO, "ELSA Authentication Info"},
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{0, NULL}};
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static value_string iapp_cap_vals[] = {
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{IAPP_CAP_FORWARDING, "Forwarding"},
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{IAPP_CAP_WEP, "WEP"},
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{0, NULL}};
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static value_string iapp_phy_vals[] = {
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{IAPP_PHY_PROP, "Proprietary"},
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{IAPP_PHY_FHSS, "FHSS"},
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{IAPP_PHY_DSSS, "DSSS"},
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{IAPP_PHY_IR, "Infrared"},
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{IAPP_PHY_OFDM, "OFDM"},
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{0, NULL}};
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static value_string iapp_dom_vals[] = {
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{IAPP_DOM_FCC, "FCC (USA)"},
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{IAPP_DOM_IC, "IC (Canada)"},
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{IAPP_DOM_ETSI, "ETSI (Europe)"},
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{IAPP_DOM_SPAIN, "Spain"},
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{IAPP_DOM_FRANCE, "France"},
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{IAPP_DOM_MKK, "MKK (Japan)"},
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{0, NULL}};
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static value_string iapp_auth_type_vals[] = {
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{IAPP_AUTH_STATUS, "Status"},
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{IAPP_AUTH_USERNAME, "User Name"},
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{IAPP_AUTH_PROVNAME, "Provider Name"},
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{IAPP_AUTH_RXPKTS, "Received Packets"},
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{IAPP_AUTH_TXPKTS, "Transmitted Packets"},
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{IAPP_AUTH_RXBYTES, "Received Octets"},
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{IAPP_AUTH_TXBYTES, "Transmitted Octets"},
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{IAPP_AUTH_LOGINTIME, "Session Time"},
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{IAPP_AUTH_TIMELIMIT, "Time Limit"},
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{IAPP_AUTH_VOLLIMIT, "Volume Limit"},
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{IAPP_AUTH_ACCCYCLE, "Accounting Cycle"},
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{IAPP_AUTH_TRAILER, "Authenticator"},
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{IAPP_AUTH_RXGWORDS, "Received Gigawords"},
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{IAPP_AUTH_TXGWORDS, "Transmitted Gigawords"},
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{IAPP_AUTH_IPADDR, "Client IP Address"},
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{0, NULL}};
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static gchar textbuffer[2000];
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static gchar*
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iaconvertbufftostr(gchar *dest, tvbuff_t *tvb, int offset, int length)
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{
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/*converts the raw buffer into printable text */
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guint32 i;
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guint32 totlen=0;
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const guint8 *pd = tvb_get_ptr(tvb, offset, length);
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dest[0]='"';
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dest[1]=0;
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totlen=1;
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for (i=0; i < (guint32)length; i++)
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{
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if( isalnum((int)pd[i])||ispunct((int)pd[i])
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||((int)pd[i]==' ')) {
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dest[totlen]=(gchar)pd[i];
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totlen++;
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}
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else
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{
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sprintf(&(dest[totlen]), "\\%03o", pd[i]);
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totlen=totlen+strlen(&(dest[totlen]));
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}
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}
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dest[totlen]='"';
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dest[totlen+1]=0;
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return dest;
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}
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/* dissect a capability bit field */
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static void dissect_caps(proto_item *pitem, tvbuff_t *tvb, int offset)
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{
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proto_tree *captree;
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int bit, val, z, thisbit;
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gchar *strval, bitval[20];
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captree = proto_item_add_subtree(pitem, ett_iapp_cap);
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val = tvb_get_guint8(tvb, offset + 3);
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bitval[8] = '\0';
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for (bit = 7; bit >= 0; bit--)
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{
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strval = match_strval(1 << bit, iapp_cap_vals);
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if (strval)
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{
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thisbit = (val & (1 << bit)) ? 1 : 0;
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for (z = 0; z < 7; z++)
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if (z == 7 - bit)
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bitval[z] = thisbit + '0';
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else
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bitval[z] = '.';
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proto_tree_add_text(captree, tvb, offset + 3, 1, "%s %s: %s",
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bitval, strval, thisbit ? "Yes" : "No");
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}
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}
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}
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static gchar*
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authval_to_str(int type, int len, tvbuff_t *tvb, int offset)
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{
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gchar *run;
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int z, val;
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run = textbuffer;
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run += sprintf(run, "Value: ");
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switch (type)
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{
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case IAPP_AUTH_STATUS:
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strcpy(textbuffer, tvb_get_guint8(tvb, offset + 3) ? "Authenticated" : "Not authenticated");
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break;
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case IAPP_AUTH_USERNAME:
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case IAPP_AUTH_PROVNAME:
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iaconvertbufftostr(run, tvb, offset + 3, len);
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break;
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case IAPP_AUTH_RXPKTS:
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case IAPP_AUTH_TXPKTS:
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case IAPP_AUTH_RXBYTES:
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case IAPP_AUTH_TXBYTES:
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case IAPP_AUTH_RXGWORDS:
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case IAPP_AUTH_TXGWORDS:
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case IAPP_AUTH_VOLLIMIT:
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val = tvb_get_ntohl(tvb, offset + 3);
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run += sprintf(run, "%d", val);
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break;
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case IAPP_AUTH_LOGINTIME:
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case IAPP_AUTH_TIMELIMIT:
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case IAPP_AUTH_ACCCYCLE:
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val = tvb_get_ntohl(tvb, offset + 3);
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run += sprintf(run, "%d seconds", val);
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break;
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case IAPP_AUTH_IPADDR:
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run += sprintf(run, "%d.%d.%d.%d",
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tvb_get_guint8(tvb, offset + 3),
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tvb_get_guint8(tvb, offset + 4),
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tvb_get_guint8(tvb, offset + 5),
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tvb_get_guint8(tvb, offset + 6));
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break;
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case IAPP_AUTH_TRAILER:
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for (z = 0; z < len; z++)
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run += sprintf(run, " %02x", tvb_get_guint8(tvb, offset + 3 + z));
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break;
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}
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return textbuffer;
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}
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/* dissect authentication info */
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static void dissect_authinfo(proto_item *pitem, tvbuff_t *tvb, int offset, int sumlen)
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{
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proto_tree *authtree;
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e_pduhdr pduhdr;
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gchar *authstrval, *valstr;
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int len;
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authtree = proto_item_add_subtree(pitem, ett_iapp_auth);
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while (sumlen > 0)
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{
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tvb_memcpy(tvb, (guint8 *)&pduhdr, offset, sizeof(e_pduhdr));
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len = (((int)pduhdr.pdu_len_h) << 8) + pduhdr.pdu_len_l;
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authstrval = val_to_str(pduhdr.pdu_type, iapp_auth_type_vals,
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"Unknown PDU Type");
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valstr = authval_to_str(pduhdr.pdu_type, len, tvb, offset);
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proto_tree_add_text(authtree, tvb, offset, len + 3, "%s(%d) %s",
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authstrval, pduhdr.pdu_type, valstr);
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sumlen -= (len + 3);
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offset += (len + 3);
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}
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}
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/* get displayable values of PDU contents */
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static int is_fhss = 0;
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static gchar*
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pduval_to_str(int type, int len, tvbuff_t *tvb, int offset)
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{
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gchar *run;
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const guint8 *mac;
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int z, val;
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gchar *strval;
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run = textbuffer;
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run += sprintf(run, "Value: ");
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switch (type)
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{
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case IAPP_PDU_SSID:
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iaconvertbufftostr(run, tvb, offset + 3, len);
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break;
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case IAPP_PDU_BSSID:
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case IAPP_PDU_OLDBSSID:
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case IAPP_PDU_MSADDR:
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mac = tvb_get_ptr(tvb, offset + 3, len);
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for (z = 0; z < len; z++)
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run += sprintf(run, "%s%02x", z ? ":" : "", mac[z]);
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break;
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case IAPP_PDU_CAPABILITY:
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{
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int mask, first = 1;
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val = tvb_get_guint8(tvb, offset + 3);
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run += sprintf(run, "%02x (", val);
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for (mask = 0x80; mask; mask >>= 1)
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if (val & mask)
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{
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strval = match_strval(mask, iapp_cap_vals);
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if (strval)
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{
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if (!first)
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run += sprintf(run, " ");
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run += sprintf(run, strval);
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}
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}
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run += sprintf(run, ")");
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break;
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}
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case IAPP_PDU_ANNOUNCEINT:
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val = tvb_get_ntohs(tvb, offset + 3);
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run += sprintf(run, "%d seconds", val);
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break;
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case IAPP_PDU_HOTIMEOUT:
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case IAPP_PDU_BEACONINT:
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val = tvb_get_ntohs(tvb, offset + 3);
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run += sprintf(run, "%d Kus", val);
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break;
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case IAPP_PDU_MESSAGEID:
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val = tvb_get_ntohs(tvb, offset + 3);
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run += sprintf(run, "%d", val);
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break;
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case IAPP_PDU_PHYTYPE:
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val = tvb_get_guint8(tvb, offset + 3);
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strval = val_to_str(val, iapp_phy_vals, "Unknown");
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run += sprintf(run, strval);
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is_fhss = (val == IAPP_PHY_FHSS);
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break;
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case IAPP_PDU_REGDOMAIN:
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val = tvb_get_guint8(tvb, offset + 3);
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strval = val_to_str(val, iapp_dom_vals, "Unknown");
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run += sprintf(run, strval);
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break;
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case IAPP_PDU_CHANNEL:
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val = tvb_get_guint8(tvb, offset + 3);
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if (is_fhss)
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run += sprintf(run, "Pattern set %d, sequence %d",
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((val >> 6) & 3) + 1, (val & 31) + 1);
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else
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run += sprintf(run, "%d", val);
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break;
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case IAPP_PDU_OUIIDENT:
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for (val = z = 0; z < 3; z++)
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val = (val << 8) | tvb_get_guint8(tvb, offset + 3 + z);
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strval = val_to_str(val, oui_vals, "Unknown");
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run += sprintf(run, strval);
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break;
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}
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return textbuffer;
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}
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/* code to dissect a list of PDUs */
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static void
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dissect_pdus(tvbuff_t *tvb, int offset, proto_tree *pdutree, int pdulen)
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{
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e_pduhdr pduhdr;
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int len;
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gchar *pdustrval, *valstr;
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proto_item *ti;
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if (!pdulen)
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{
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proto_tree_add_text(pdutree, tvb, offset, 0, "No PDUs found");
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return;
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}
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while (pdulen > 0)
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{
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tvb_memcpy(tvb, (guint8 *)&pduhdr, offset, sizeof(e_pduhdr));
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len = (((int)pduhdr.pdu_len_h) << 8) + pduhdr.pdu_len_l;
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pdustrval = val_to_str(pduhdr.pdu_type, iapp_pdu_type_vals,
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"Unknown PDU Type");
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valstr = pduval_to_str(pduhdr.pdu_type, len, tvb, offset);
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ti = proto_tree_add_text(pdutree, tvb, offset, len + 3, "%s(%d) %s",
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pdustrval, pduhdr.pdu_type, valstr);
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if (pduhdr.pdu_type == IAPP_PDU_CAPABILITY)
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dissect_caps(ti, tvb, offset);
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if (pduhdr.pdu_type == IAPP_PDU_AUTHINFO)
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dissect_authinfo(ti, tvb, offset + 3, len);
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pdulen -= (len + 3);
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offset += (len + 3);
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}
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}
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/* code to dissect an IAPP packet */
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static void
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dissect_iapp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
|
|
proto_item *ti, *pdutf;
|
|
proto_tree *iapp_tree, *pdutree;
|
|
e_iapphdr ih;
|
|
int ia_version;
|
|
int ia_type;
|
|
gchar *codestrval;
|
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "IAPP");
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
tvb_memcpy(tvb, (guint8 *)&ih, 0, sizeof(e_iapphdr));
|
|
|
|
ia_version = (int)ih.ia_version;
|
|
ia_type = (int)ih.ia_type;
|
|
codestrval = val_to_str(ia_type, iapp_vals, "Unknown Packet");
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
{
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%s(%d) (version=%d)",
|
|
codestrval, ia_type, ia_version);
|
|
}
|
|
|
|
if (tree)
|
|
{
|
|
ti = proto_tree_add_item(tree, proto_iapp, tvb, 0, -1, FALSE);
|
|
iapp_tree = proto_item_add_subtree(ti, ett_iapp);
|
|
|
|
/* common header for all IAPP frames */
|
|
|
|
proto_tree_add_uint(iapp_tree, hf_iapp_version, tvb, 0, 1,
|
|
ih.ia_version);
|
|
proto_tree_add_uint_format(iapp_tree, hf_iapp_type, tvb, 1, 1,
|
|
ih.ia_type, "Type: %s(%d)", codestrval, ia_type);
|
|
|
|
pdutf = proto_tree_add_text(iapp_tree, tvb, 2, -1,
|
|
"Protocol data units");
|
|
pdutree = proto_item_add_subtree(pdutf, ett_iapp_pdu);
|
|
|
|
if (pdutree)
|
|
{
|
|
dissect_pdus(tvb, 2, pdutree,
|
|
tvb_length_remaining(tvb, 2));
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* Register the protocol with Ethereal */
|
|
|
|
/* this format is require because a script is used to build the C function
|
|
that calls all the protocol registration.
|
|
*/
|
|
|
|
void
|
|
proto_register_iapp(void)
|
|
{
|
|
|
|
/* Setup list of header fields See Section 1.6.1 for details*/
|
|
static hf_register_info hf[] = {
|
|
{ &hf_iapp_version,
|
|
{ "Version", "iapp.version", FT_UINT8, BASE_DEC, NULL, 0x00, "", HFILL }
|
|
},
|
|
{ &hf_iapp_type,
|
|
{ "type", "iapp.type", FT_UINT8, BASE_DEC, NULL, 0x00, "", HFILL }
|
|
},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_iapp,
|
|
&ett_iapp_pdu,
|
|
&ett_iapp_cap,
|
|
&ett_iapp_auth
|
|
};
|
|
|
|
/* Register the protocol name and description */
|
|
proto_iapp = proto_register_protocol("Inter-Access-Point Protocol",
|
|
"IAPP", "iapp");
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_iapp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
|
|
/* If this dissector uses sub-dissector registration add a registration routine.
|
|
This format is required because a script is used to find these routines and
|
|
create the code that calls these routines.
|
|
*/
|
|
void
|
|
proto_reg_handoff_iapp(void)
|
|
{
|
|
dissector_handle_t iapp_handle;
|
|
|
|
iapp_handle = create_dissector_handle(dissect_iapp, proto_iapp);
|
|
dissector_add("udp.port", UDP_PORT_IAPP, iapp_handle);
|
|
}
|