forked from osmocom/wireshark
157 lines
4 KiB
C
157 lines
4 KiB
C
|
/* packet-eap.c
|
||
|
* Routines for EAP Extensible Authentication Protocol header disassembly
|
||
|
*
|
||
|
* $Id: packet-eap.c,v 1.1 2001/11/06 20:30:39 guy Exp $
|
||
|
*
|
||
|
* Ethereal - Network traffic analyzer
|
||
|
* By Gerald Combs <gerald@ethereal.com>
|
||
|
* Copyright 1998 Gerald Combs
|
||
|
*
|
||
|
* This program is free software; you can redistribute it and/or
|
||
|
* modify it under the terms of the GNU General Public License
|
||
|
* as published by the Free Software Foundation; either version 2
|
||
|
* of the License, or (at your option) any later version.
|
||
|
*
|
||
|
* This program is distributed in the hope that it will be useful,
|
||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
* GNU General Public License for more details.
|
||
|
*
|
||
|
* You should have received a copy of the GNU General Public License
|
||
|
* along with this program; if not, write to the Free Software
|
||
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||
|
*/
|
||
|
|
||
|
#ifdef HAVE_CONFIG_H
|
||
|
# include "config.h"
|
||
|
#endif
|
||
|
|
||
|
#ifdef HAVE_SYS_TYPES_H
|
||
|
# include <sys/types.h>
|
||
|
#endif
|
||
|
|
||
|
#ifdef HAVE_NETINET_IN_H
|
||
|
# include <netinet/in.h>
|
||
|
#endif
|
||
|
|
||
|
#include <glib.h>
|
||
|
#include "packet.h"
|
||
|
#include "packet-ieee8023.h"
|
||
|
#include "packet-ipx.h"
|
||
|
#include "packet-llc.h"
|
||
|
#include "etypes.h"
|
||
|
#include "ppptypes.h"
|
||
|
|
||
|
static int proto_eap = -1;
|
||
|
static int hf_eap_code = -1;
|
||
|
static int hf_eap_identifier = -1;
|
||
|
static int hf_eap_len = -1;
|
||
|
static int hf_eap_type = -1;
|
||
|
|
||
|
static gint ett_eap = -1;
|
||
|
|
||
|
typedef struct _e_eap {
|
||
|
guint8 eap_code;
|
||
|
guint8 eap_id;
|
||
|
guint16 eap_len;
|
||
|
} e_eap;
|
||
|
|
||
|
static const char *eap_code_name[] = {
|
||
|
"Undefined",
|
||
|
"Request",
|
||
|
"Response",
|
||
|
"Success",
|
||
|
"Failure",
|
||
|
};
|
||
|
#define EAP_CODE_COUNT (sizeof(eap_code_name)/sizeof(eap_code_name[0]))
|
||
|
|
||
|
static const char *eap_type_name[] = {
|
||
|
"Undefined",
|
||
|
"Identity",
|
||
|
"Nak (Response only)",
|
||
|
"MD5-Challenge",
|
||
|
"One-Time Password",
|
||
|
"Generic Token Card",
|
||
|
};
|
||
|
#define EAP_TYPE_COUNT (sizeof(eap_type_name)/sizeof(eap_type_name[0]))
|
||
|
|
||
|
|
||
|
void
|
||
|
dissect_eap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
||
|
{
|
||
|
e_eap eaph;
|
||
|
guint len;
|
||
|
proto_tree *ti;
|
||
|
proto_tree *volatile eap_tree;
|
||
|
|
||
|
if (check_col(pinfo->fd, COL_PROTOCOL))
|
||
|
col_set_str(pinfo->fd, COL_PROTOCOL, "EAP");
|
||
|
if (check_col(pinfo->fd, COL_INFO))
|
||
|
col_clear(pinfo->fd, COL_INFO);
|
||
|
|
||
|
tvb_memcpy(tvb, (guint8 *)&eaph, 0, sizeof(eaph));
|
||
|
eaph.eap_len = ntohs(eaph.eap_len);
|
||
|
|
||
|
len = eaph.eap_len;
|
||
|
|
||
|
set_actual_length(tvb, pinfo, len);
|
||
|
|
||
|
eap_tree = NULL;
|
||
|
|
||
|
if (tree) {
|
||
|
ti = proto_tree_add_item(tree, proto_eap, tvb, 0, len, FALSE);
|
||
|
eap_tree = proto_item_add_subtree(ti, ett_eap);
|
||
|
|
||
|
proto_tree_add_text(eap_tree, tvb, 0, 0, "Code: %s (%u) ",
|
||
|
eaph.eap_code > EAP_CODE_COUNT?
|
||
|
"Unknown": eap_code_name[eaph.eap_code],
|
||
|
eaph.eap_code);
|
||
|
|
||
|
proto_tree_add_uint(eap_tree, hf_eap_identifier, tvb, 1, 1, eaph.eap_id);
|
||
|
proto_tree_add_uint(eap_tree, hf_eap_len, tvb, 2, 2, eaph.eap_len);
|
||
|
|
||
|
if (len > 4) {
|
||
|
guint8 eap_type = tvb_get_guint8(tvb, 4);
|
||
|
proto_tree_add_text(eap_tree, tvb, 4, 1, "Type: %s (%u)",
|
||
|
eap_type > EAP_TYPE_COUNT?
|
||
|
"Unknown" : eap_type_name[eap_type],
|
||
|
eap_type);
|
||
|
}
|
||
|
if (len > 5)
|
||
|
dissect_data(tvb, 5, pinfo, tree);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void
|
||
|
proto_register_eap(void)
|
||
|
{
|
||
|
static hf_register_info hf[] = {
|
||
|
{ &hf_eap_code, {
|
||
|
"Code", "eap.code", FT_UINT8, BASE_DEC,
|
||
|
NULL, 0x0, "", HFILL }},
|
||
|
{ &hf_eap_identifier, {
|
||
|
"Id", "eap.id", FT_UINT8, BASE_DEC,
|
||
|
NULL, 0x0, "", HFILL }},
|
||
|
{ &hf_eap_len, {
|
||
|
"Length", "eap.len", FT_UINT16, BASE_DEC,
|
||
|
NULL, 0x0, "", HFILL }},
|
||
|
{ &hf_eap_type, {
|
||
|
"Type", "eap.type", FT_UINT8, BASE_DEC,
|
||
|
NULL, 0x0, "", HFILL }},
|
||
|
};
|
||
|
static gint *ett[] = {
|
||
|
&ett_eap,
|
||
|
};
|
||
|
|
||
|
proto_eap = proto_register_protocol("Extensible Authentication Protocol",
|
||
|
"EAP", "eap");
|
||
|
proto_register_field_array(proto_eap, hf, array_length(hf));
|
||
|
proto_register_subtree_array(ett, array_length(ett));
|
||
|
}
|
||
|
|
||
|
void
|
||
|
proto_reg_handoff_eap(void)
|
||
|
{
|
||
|
dissector_add("ppp.protocol", PPP_EAP, dissect_eap, proto_eap);
|
||
|
}
|