mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
308 lines
9.0 KiB
C
308 lines
9.0 KiB
C
/*
|
|
* Copyright (c) 2004 - Michael Richardson <mcr@xelerance.com>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that: (1) source code distributions
|
|
* retain the above copyright notice and this paragraph in its entirety, (2)
|
|
* distributions including binary code include the above copyright notice and
|
|
* this paragraph in its entirety in the documentation or other materials
|
|
* provided with the distribution, and (3) all advertising materials mentioning
|
|
* features or use of this software display the following acknowledgement:
|
|
* ``This product includes software developed by the University of California,
|
|
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
|
|
* the University nor the names of its contributors may be used to endorse
|
|
* or promote products derived from this software without specific prior
|
|
* written permission.
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
*
|
|
* Format and print EAP packets.
|
|
*
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] _U_ =
|
|
"@(#) $Header: /tcpdump/master/tcpdump/print-eap.c,v 1.5 2007-10-04 16:41:33 hannes Exp $";
|
|
#endif
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <tcpdump-stdinc.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "netdissect.h"
|
|
#include "interface.h"
|
|
#include "addrtoname.h"
|
|
#include "extract.h"
|
|
#include "ether.h"
|
|
|
|
#define EAP_FRAME_TYPE_PACKET 0
|
|
#define EAP_FRAME_TYPE_START 1
|
|
#define EAP_FRAME_TYPE_LOGOFF 2
|
|
#define EAP_FRAME_TYPE_KEY 3
|
|
#define EAP_FRAME_TYPE_ENCAP_ASF_ALERT 4
|
|
|
|
struct eap_frame_t {
|
|
unsigned char version;
|
|
unsigned char type;
|
|
unsigned char length[2];
|
|
};
|
|
|
|
static const struct tok eap_frame_type_values[] = {
|
|
{ EAP_FRAME_TYPE_PACKET, "EAP packet" },
|
|
{ EAP_FRAME_TYPE_START, "EAPOL start" },
|
|
{ EAP_FRAME_TYPE_LOGOFF, "EAPOL logoff" },
|
|
{ EAP_FRAME_TYPE_KEY, "EAPOL key" },
|
|
{ EAP_FRAME_TYPE_ENCAP_ASF_ALERT, "Encapsulated ASF alert" },
|
|
{ 0, NULL}
|
|
};
|
|
|
|
/* RFC 3748 */
|
|
struct eap_packet_t {
|
|
unsigned char code;
|
|
unsigned char id;
|
|
unsigned char length[2];
|
|
};
|
|
|
|
#define EAP_REQUEST 1
|
|
#define EAP_RESPONSE 2
|
|
#define EAP_SUCCESS 3
|
|
#define EAP_FAILURE 4
|
|
|
|
static const struct tok eap_code_values[] = {
|
|
{ EAP_REQUEST, "Request" },
|
|
{ EAP_RESPONSE, "Response" },
|
|
{ EAP_SUCCESS, "Success" },
|
|
{ EAP_FAILURE, "Failure" },
|
|
{ 0, NULL}
|
|
};
|
|
|
|
#define EAP_TYPE_NO_PROPOSED 0
|
|
#define EAP_TYPE_IDENTITY 1
|
|
#define EAP_TYPE_NOTIFICATION 2
|
|
#define EAP_TYPE_NAK 3
|
|
#define EAP_TYPE_MD5_CHALLENGE 4
|
|
#define EAP_TYPE_OTP 5
|
|
#define EAP_TYPE_GTC 6
|
|
#define EAP_TYPE_TLS 13 /* RFC 2716 */
|
|
#define EAP_TYPE_SIM 18 /* RFC 4186 */
|
|
#define EAP_TYPE_TTLS 21 /* draft-funk-eap-ttls-v0-01.txt */
|
|
#define EAP_TYPE_AKA 23 /* RFC 4187 */
|
|
#define EAP_TYPE_FAST 43 /* RFC 4851 */
|
|
#define EAP_TYPE_EXPANDED_TYPES 254
|
|
#define EAP_TYPE_EXPERIMENTAL 255
|
|
|
|
static const struct tok eap_type_values[] = {
|
|
{ EAP_TYPE_NO_PROPOSED, "No proposed" },
|
|
{ EAP_TYPE_IDENTITY, "Identity" },
|
|
{ EAP_TYPE_NOTIFICATION, "Notification" },
|
|
{ EAP_TYPE_NAK, "Nak" },
|
|
{ EAP_TYPE_MD5_CHALLENGE, "MD5-challenge" },
|
|
{ EAP_TYPE_OTP, "OTP" },
|
|
{ EAP_TYPE_GTC, "GTC" },
|
|
{ EAP_TYPE_TLS, "TLS" },
|
|
{ EAP_TYPE_SIM, "SIM" },
|
|
{ EAP_TYPE_TTLS, "TTLS" },
|
|
{ EAP_TYPE_AKA, "AKA" },
|
|
{ EAP_TYPE_FAST, "FAST" },
|
|
{ EAP_TYPE_EXPANDED_TYPES, "Expanded types" },
|
|
{ EAP_TYPE_EXPERIMENTAL, "Experimental" },
|
|
{ 0, NULL}
|
|
};
|
|
|
|
#define EAP_TLS_EXTRACT_BIT_L(x) (((x)&0x80)>>7)
|
|
|
|
/* RFC 2716 - EAP TLS bits */
|
|
#define EAP_TLS_FLAGS_LEN_INCLUDED (1 << 7)
|
|
#define EAP_TLS_FLAGS_MORE_FRAGMENTS (1 << 6)
|
|
#define EAP_TLS_FLAGS_START (1 << 5)
|
|
|
|
static const struct tok eap_tls_flags_values[] = {
|
|
{ EAP_TLS_FLAGS_LEN_INCLUDED, "L bit" },
|
|
{ EAP_TLS_FLAGS_MORE_FRAGMENTS, "More fragments bit"},
|
|
{ EAP_TLS_FLAGS_START, "Start bit"},
|
|
{ 0, NULL}
|
|
};
|
|
|
|
#define EAP_TTLS_VERSION(x) ((x)&0x07)
|
|
|
|
/* EAP-AKA and EAP-SIM - RFC 4187 */
|
|
#define EAP_AKA_CHALLENGE 1
|
|
#define EAP_AKA_AUTH_REJECT 2
|
|
#define EAP_AKA_SYNC_FAILURE 4
|
|
#define EAP_AKA_IDENTITY 5
|
|
#define EAP_SIM_START 10
|
|
#define EAP_SIM_CHALLENGE 11
|
|
#define EAP_AKA_NOTIFICATION 12
|
|
#define EAP_AKA_REAUTH 13
|
|
#define EAP_AKA_CLIENT_ERROR 14
|
|
|
|
static const struct tok eap_aka_subtype_values[] = {
|
|
{ EAP_AKA_CHALLENGE, "Challenge" },
|
|
{ EAP_AKA_AUTH_REJECT, "Auth reject" },
|
|
{ EAP_AKA_SYNC_FAILURE, "Sync failure" },
|
|
{ EAP_AKA_IDENTITY, "Identity" },
|
|
{ EAP_SIM_START, "Start" },
|
|
{ EAP_SIM_CHALLENGE, "Challenge" },
|
|
{ EAP_AKA_NOTIFICATION, "Notification" },
|
|
{ EAP_AKA_REAUTH, "Reauth" },
|
|
{ EAP_AKA_CLIENT_ERROR, "Client error" },
|
|
{ 0, NULL}
|
|
};
|
|
|
|
/*
|
|
* Print EAP requests / responses
|
|
*/
|
|
void
|
|
eap_print(netdissect_options *ndo _U_,
|
|
register const u_char *cp,
|
|
u_int length _U_)
|
|
{
|
|
const struct eap_frame_t *eap;
|
|
const u_char *tptr;
|
|
u_int tlen, type, subtype;
|
|
int count=0, len;
|
|
|
|
tptr = cp;
|
|
tlen = length;
|
|
eap = (const struct eap_frame_t *)cp;
|
|
TCHECK(*eap);
|
|
|
|
/* in non-verbose mode just lets print the basic info */
|
|
if (vflag < 1) {
|
|
printf("%s (%u) v%u, len %u",
|
|
tok2str(eap_frame_type_values, "unknown", eap->type),
|
|
eap->type,
|
|
eap->version,
|
|
EXTRACT_16BITS(eap->length));
|
|
return;
|
|
}
|
|
|
|
printf("%s (%u) v%u, len %u",
|
|
tok2str(eap_frame_type_values, "unknown", eap->type),
|
|
eap->type,
|
|
eap->version,
|
|
EXTRACT_16BITS(eap->length));
|
|
|
|
tptr += sizeof(const struct eap_frame_t);
|
|
tlen -= sizeof(const struct eap_frame_t);
|
|
|
|
switch (eap->type) {
|
|
case EAP_FRAME_TYPE_PACKET:
|
|
type = *(tptr);
|
|
len = EXTRACT_16BITS(tptr+2);
|
|
printf(", %s (%u), id %u, len %u",
|
|
tok2str(eap_code_values, "unknown", type),
|
|
type,
|
|
*(tptr+1),
|
|
len);
|
|
|
|
if (!TTEST2(*tptr, len))
|
|
goto trunc;
|
|
|
|
if (type <= 2) { /* For EAP_REQUEST and EAP_RESPONSE only */
|
|
subtype = *(tptr+4);
|
|
printf("\n\t\t Type %s (%u)",
|
|
tok2str(eap_type_values, "unknown", *(tptr+4)),
|
|
*(tptr+4));
|
|
|
|
switch (subtype) {
|
|
case EAP_TYPE_IDENTITY:
|
|
if (len - 5 > 0) {
|
|
printf(", Identity: ");
|
|
safeputs((const char *)tptr+5, len-5);
|
|
}
|
|
break;
|
|
|
|
case EAP_TYPE_NOTIFICATION:
|
|
if (len - 5 > 0) {
|
|
printf(", Notification: ");
|
|
safeputs((const char *)tptr+5, len-5);
|
|
}
|
|
break;
|
|
|
|
case EAP_TYPE_NAK:
|
|
count = 5;
|
|
|
|
/*
|
|
* one or more octets indicating
|
|
* the desired authentication
|
|
* type one octet per type
|
|
*/
|
|
while (count < len) {
|
|
printf(" %s (%u),",
|
|
tok2str(eap_type_values, "unknown", *(tptr+count)),
|
|
*(tptr+count));
|
|
count++;
|
|
}
|
|
break;
|
|
|
|
case EAP_TYPE_TTLS:
|
|
printf(" TTLSv%u",
|
|
EAP_TTLS_VERSION(*(tptr+5))); /* fall through */
|
|
case EAP_TYPE_TLS:
|
|
printf(" flags [%s] 0x%02x,",
|
|
bittok2str(eap_tls_flags_values, "none", *(tptr+5)),
|
|
*(tptr+5));
|
|
|
|
if (EAP_TLS_EXTRACT_BIT_L(*(tptr+5))) {
|
|
printf(" len %u", EXTRACT_32BITS(tptr+6));
|
|
}
|
|
break;
|
|
|
|
case EAP_TYPE_FAST:
|
|
printf(" FASTv%u",
|
|
EAP_TTLS_VERSION(*(tptr+5)));
|
|
printf(" flags [%s] 0x%02x,",
|
|
bittok2str(eap_tls_flags_values, "none", *(tptr+5)),
|
|
*(tptr+5));
|
|
|
|
if (EAP_TLS_EXTRACT_BIT_L(*(tptr+5))) {
|
|
printf(" len %u", EXTRACT_32BITS(tptr+6));
|
|
}
|
|
|
|
/* FIXME - TLV attributes follow */
|
|
break;
|
|
|
|
case EAP_TYPE_AKA:
|
|
case EAP_TYPE_SIM:
|
|
printf(" subtype [%s] 0x%02x,",
|
|
tok2str(eap_aka_subtype_values, "unknown", *(tptr+5)),
|
|
*(tptr+5));
|
|
|
|
/* FIXME - TLV attributes follow */
|
|
break;
|
|
|
|
case EAP_TYPE_MD5_CHALLENGE:
|
|
case EAP_TYPE_OTP:
|
|
case EAP_TYPE_GTC:
|
|
case EAP_TYPE_EXPANDED_TYPES:
|
|
case EAP_TYPE_EXPERIMENTAL:
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case EAP_FRAME_TYPE_LOGOFF:
|
|
case EAP_FRAME_TYPE_ENCAP_ASF_ALERT:
|
|
default:
|
|
break;
|
|
}
|
|
return;
|
|
|
|
trunc:
|
|
printf("\n\t[|EAP]");
|
|
}
|
|
|
|
/*
|
|
* Local Variables:
|
|
* c-basic-offset: 4
|
|
* End:
|
|
*/
|