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/*
* hostapd / IEEE 802.1X Authenticator - EAPOL state machine
* Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#ifndef EAPOL_SM_H
#define EAPOL_SM_H
#include "defs.h"
/* IEEE Std 802.1X-2004, Ch. 8.2 */
typedef enum { ForceUnauthorized = 1, ForceAuthorized = 3, Auto = 2 }
PortTypes;
typedef enum { Unauthorized = 2, Authorized = 1 } PortState;
typedef enum { Both = 0, In = 1 } ControlledDirection;
typedef unsigned int Counter;
struct eap_sm;
struct radius_attr_data {
u8 *data;
size_t len;
};
struct radius_class_data {
struct radius_attr_data *attr;
size_t count;
};
struct eapol_state_machine {
/* timers */
int aWhile;
int quietWhile;
int reAuthWhen;
/* global variables */
Boolean authAbort;
Boolean authFail;
PortState authPortStatus;
Boolean authStart;
Boolean authTimeout;
Boolean authSuccess;
Boolean eapFail;
Boolean eapolEap;
Boolean eapSuccess;
Boolean eapTimeout;
Boolean initialize;
Boolean keyAvailable;
Boolean keyDone;
Boolean keyRun;
Boolean keyTxEnabled;
PortTypes portControl;
Boolean portEnabled;
Boolean portValid;
Boolean reAuthenticate;
/* Port Timers state machine */
/* 'Boolean tick' implicitly handled as registered timeout */
/* Authenticator PAE state machine */
enum { AUTH_PAE_INITIALIZE, AUTH_PAE_DISCONNECTED, AUTH_PAE_CONNECTING,
AUTH_PAE_AUTHENTICATING, AUTH_PAE_AUTHENTICATED,
AUTH_PAE_ABORTING, AUTH_PAE_HELD, AUTH_PAE_FORCE_AUTH,
AUTH_PAE_FORCE_UNAUTH, AUTH_PAE_RESTART } auth_pae_state;
/* variables */
Boolean eapolLogoff;
Boolean eapolStart;
Boolean eapRestart;
PortTypes portMode;
unsigned int reAuthCount;
/* constants */
unsigned int quietPeriod; /* default 60; 0..65535 */
#define AUTH_PAE_DEFAULT_quietPeriod 60
unsigned int reAuthMax; /* default 2 */
#define AUTH_PAE_DEFAULT_reAuthMax 2
/* counters */
Counter authEntersConnecting;
Counter authEapLogoffsWhileConnecting;
Counter authEntersAuthenticating;
Counter authAuthSuccessesWhileAuthenticating;
Counter authAuthTimeoutsWhileAuthenticating;
Counter authAuthFailWhileAuthenticating;
Counter authAuthEapStartsWhileAuthenticating;
Counter authAuthEapLogoffWhileAuthenticating;
Counter authAuthReauthsWhileAuthenticated;
Counter authAuthEapStartsWhileAuthenticated;
Counter authAuthEapLogoffWhileAuthenticated;
/* Backend Authentication state machine */
enum { BE_AUTH_REQUEST, BE_AUTH_RESPONSE, BE_AUTH_SUCCESS,
BE_AUTH_FAIL, BE_AUTH_TIMEOUT, BE_AUTH_IDLE, BE_AUTH_INITIALIZE,
BE_AUTH_IGNORE
} be_auth_state;
/* variables */
Boolean eapNoReq;
Boolean eapReq;
Boolean eapResp;
/* constants */
unsigned int serverTimeout; /* default 30; 1..X */
#define BE_AUTH_DEFAULT_serverTimeout 30
/* counters */
Counter backendResponses;
Counter backendAccessChallenges;
Counter backendOtherRequestsToSupplicant;
Counter backendAuthSuccesses;
Counter backendAuthFails;
/* Reauthentication Timer state machine */
enum { REAUTH_TIMER_INITIALIZE, REAUTH_TIMER_REAUTHENTICATE
} reauth_timer_state;
/* constants */
unsigned int reAuthPeriod; /* default 3600 s */
Boolean reAuthEnabled;
/* Authenticator Key Transmit state machine */
enum { AUTH_KEY_TX_NO_KEY_TRANSMIT, AUTH_KEY_TX_KEY_TRANSMIT
} auth_key_tx_state;
/* Key Receive state machine */
enum { KEY_RX_NO_KEY_RECEIVE, KEY_RX_KEY_RECEIVE } key_rx_state;
/* variables */
Boolean rxKey;
/* Controlled Directions state machine */
enum { CTRL_DIR_FORCE_BOTH, CTRL_DIR_IN_OR_BOTH } ctrl_dir_state;
/* variables */
ControlledDirection adminControlledDirections;
ControlledDirection operControlledDirections;
Boolean operEdge;
/* Authenticator Statistics Table */
Counter dot1xAuthEapolFramesRx;
Counter dot1xAuthEapolFramesTx;
Counter dot1xAuthEapolStartFramesRx;
Counter dot1xAuthEapolLogoffFramesRx;
Counter dot1xAuthEapolRespIdFramesRx;
Counter dot1xAuthEapolRespFramesRx;
Counter dot1xAuthEapolReqIdFramesTx;
Counter dot1xAuthEapolReqFramesTx;
Counter dot1xAuthInvalidEapolFramesRx;
Counter dot1xAuthEapLengthErrorFramesRx;
Counter dot1xAuthLastEapolFrameVersion;
/* Other variables - not defined in IEEE 802.1X */
u8 addr[ETH_ALEN]; /* Supplicant address */
#define EAPOL_SM_PREAUTH BIT(0)
int flags; /* EAPOL_SM_* */
int radius_identifier;
/* TODO: check when the last messages can be released */
struct radius_msg *last_recv_radius;
u8 *last_eap_supp; /* last received EAP Response from Supplicant */
size_t last_eap_supp_len;
u8 *last_eap_radius; /* last received EAP Response from Authentication
* Server */
size_t last_eap_radius_len;
u8 *identity;
size_t identity_len;
u8 eap_type_authsrv; /* EAP type of the last EAP packet from
* Authentication server */
u8 eap_type_supp; /* EAP type of the last EAP packet from Supplicant */
struct radius_class_data radius_class;
/* Keys for encrypting and signing EAPOL-Key frames */
u8 *eapol_key_sign;
size_t eapol_key_sign_len;
u8 *eapol_key_crypt;
size_t eapol_key_crypt_len;
Boolean rx_identity; /* set to TRUE on reception of
* EAP-Response/Identity */
struct eap_sm *eap;
/* currentId was removed in IEEE 802.1X-REV, but it is needed to filter
* out EAP-Responses to old packets (e.g., to two EAP-Request/Identity
* packets that are often sent in the beginning of the authentication).
*/
u8 currentId;
Boolean initializing; /* in process of initializing state machines */
Boolean changed;
/* Somewhat nasty pointers to global hostapd and STA data to avoid
* passing these to every function */
struct hostapd_data *hapd;
struct sta_info *sta;
};
struct eapol_state_machine *eapol_sm_alloc(struct hostapd_data *hapd,
struct sta_info *sta);
void eapol_sm_free(struct eapol_state_machine *sm);
void eapol_sm_step(struct eapol_state_machine *sm);
void eapol_sm_initialize(struct eapol_state_machine *sm);
void eapol_sm_dump_state(FILE *f, const char *prefix,
struct eapol_state_machine *sm);
int eapol_sm_eap_pending_cb(struct eapol_state_machine *sm, void *ctx);
#endif /* EAPOL_SM_H */
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