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Diffstat (limited to 'freebsd/contrib/tcpdump/print-eap.c')
| -rw-r--r-- | freebsd/contrib/tcpdump/print-eap.c | 309 |
1 files changed, 309 insertions, 0 deletions
diff --git a/freebsd/contrib/tcpdump/print-eap.c b/freebsd/contrib/tcpdump/print-eap.c new file mode 100644 index 00000000..5730dbb7 --- /dev/null +++ b/freebsd/contrib/tcpdump/print-eap.c @@ -0,0 +1,309 @@ +#include <machine/rtems-bsd-user-space.h> + +/* + * 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: + */ |