contrib/wpa_supplicant-0.4.9/wpa_i.h

   1 /*
   2  * wpa_supplicant - Internal WPA state machine definitions
   3  * Copyright (c) 2004-2005, Jouni Malinen <jkmaline@cc.hut.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #ifndef WPA_I_H
  16 #define WPA_I_H
  17
  18 #define WPA_NONCE_LEN 32
  19 #define WPA_REPLAY_COUNTER_LEN 8
  20
  21
  22 struct rsn_pmksa_candidate;
  23
  24 /**
  25  * struct wpa_ptk - WPA Pairwise Transient Key
  26  * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
  27  */
  28 struct wpa_ptk {
  29         u8 kck[16]; /* EAPOL-Key Key Confirmation Key (KCK) */
  30         u8 kek[16]; /* EAPOL-Key Key Encryption Key (KEK) */
  31         u8 tk1[16]; /* Temporal Key 1 (TK1) */
  32         union {
  33                 u8 tk2[16]; /* Temporal Key 2 (TK2) */
  34                 struct {
  35                         u8 tx_mic_key[8];
  36                         u8 rx_mic_key[8];
  37                 } auth;
  38         } u;
  39 } __attribute__ ((packed));
  40
  41
  42 /**
  43  * struct rsn_pmksa_cache - PMKSA cache entry
  44  */
  45 struct rsn_pmksa_cache {
  46         struct rsn_pmksa_cache *next;
  47         u8 pmkid[PMKID_LEN];
  48         u8 pmk[PMK_LEN];
  49         size_t pmk_len;
  50         time_t expiration;
  51         time_t reauth_time;
  52         int akmp; /* WPA_KEY_MGMT_* */
  53         u8 aa[ETH_ALEN];
  54         struct wpa_ssid *ssid;
  55         int opportunistic;
  56 };
  57
  58
  59 /**
  60  * struct wpa_sm - Internal WPA state machine data
  61  */
  62 struct wpa_sm {
  63         u8 pmk[PMK_LEN];
  64         size_t pmk_len;
  65         struct wpa_ptk ptk, tptk;
  66         int ptk_set, tptk_set;
  67         u8 snonce[WPA_NONCE_LEN];
  68         u8 anonce[WPA_NONCE_LEN]; /* ANonce from the last 1/4 msg */
  69         int renew_snonce;
  70         u8 rx_replay_counter[WPA_REPLAY_COUNTER_LEN];
  71         int rx_replay_counter_set;
  72         u8 request_counter[WPA_REPLAY_COUNTER_LEN];
  73
  74         struct eapol_sm *eapol; /* EAPOL state machine from upper level code */
  75
  76         struct rsn_pmksa_cache *pmksa; /* PMKSA cache */
  77         struct rsn_pmksa_cache *cur_pmksa; /* current PMKSA entry */
  78         int pmksa_count; /* number of entries in PMKSA cache */
  79         struct rsn_pmksa_candidate *pmksa_candidates;
  80
  81         struct l2_packet_data *l2_preauth;
  82         u8 preauth_bssid[ETH_ALEN]; /* current RSN pre-auth peer or
  83                                      * 00:00:00:00:00:00 if no pre-auth is
  84                                      * in progress */
  85         struct eapol_sm *preauth_eapol;
  86
  87         struct wpa_sm_ctx *ctx;
  88
  89         void *scard_ctx; /* context for smartcard callbacks */
  90         int fast_reauth; /* whether EAP fast re-authentication is enabled */
  91
  92         struct wpa_ssid *cur_ssid;
  93
  94         u8 own_addr[ETH_ALEN];
  95         const char *ifname;
  96         u8 bssid[ETH_ALEN];
  97
  98         unsigned int dot11RSNAConfigPMKLifetime;
  99         unsigned int dot11RSNAConfigPMKReauthThreshold;
 100         unsigned int dot11RSNAConfigSATimeout;
 101
 102         unsigned int dot11RSNA4WayHandshakeFailures;
 103
 104         /* Selected configuration (based on Beacon/ProbeResp WPA IE) */
 105         unsigned int proto;
 106         unsigned int pairwise_cipher;
 107         unsigned int group_cipher;
 108         unsigned int key_mgmt;
 109
 110         u8 *assoc_wpa_ie; /* Own WPA/RSN IE from (Re)AssocReq */
 111         size_t assoc_wpa_ie_len;
 112         u8 *ap_wpa_ie, *ap_rsn_ie;
 113         size_t ap_wpa_ie_len, ap_rsn_ie_len;
 114 };
 115
 116
 117 static inline void wpa_sm_set_state(struct wpa_sm *sm, wpa_states state)
 118 {
 119         sm->ctx->set_state(sm->ctx->ctx, state);
 120 }
 121
 122 static inline wpa_states wpa_sm_get_state(struct wpa_sm *sm)
 123 {
 124         return sm->ctx->get_state(sm->ctx->ctx);
 125 }
 126
 127 static inline void wpa_sm_req_scan(struct wpa_sm *sm, int sec, int usec)
 128 {
 129         sm->ctx->req_scan(sm->ctx->ctx, sec, usec);
 130 }
 131
 132 static inline void wpa_sm_deauthenticate(struct wpa_sm *sm, int reason_code)
 133 {
 134         sm->ctx->deauthenticate(sm->ctx->ctx, reason_code);
 135 }
 136
 137 static inline void wpa_sm_disassociate(struct wpa_sm *sm, int reason_code)
 138 {
 139         sm->ctx->disassociate(sm->ctx->ctx, reason_code);
 140 }
 141
 142 static inline int wpa_sm_set_key(struct wpa_sm *sm, wpa_alg alg,
 143                                  const u8 *addr, int key_idx, int set_tx,
 144                                  const u8 *seq, size_t seq_len,
 145                                  const u8 *key, size_t key_len)
 146 {
 147         return sm->ctx->set_key(sm->ctx->ctx, alg, addr, key_idx, set_tx,
 148                                 seq, seq_len, key, key_len);
 149 }
 150
 151 static inline struct wpa_ssid * wpa_sm_get_ssid(struct wpa_sm *sm)
 152 {
 153         return sm->ctx->get_ssid(sm->ctx->ctx);
 154 }
 155
 156 static inline int wpa_sm_get_bssid(struct wpa_sm *sm, u8 *bssid)
 157 {
 158         return sm->ctx->get_bssid(sm->ctx->ctx, bssid);
 159 }
 160
 161 static inline int wpa_sm_ether_send(struct wpa_sm *sm, const u8 *dest,
 162                                     u16 proto, const u8 *buf, size_t len)
 163 {
 164         return sm->ctx->ether_send(sm->ctx->ctx, dest, proto, buf, len);
 165 }
 166
 167 static inline int wpa_sm_get_beacon_ie(struct wpa_sm *sm)
 168 {
 169         return sm->ctx->get_beacon_ie(sm->ctx->ctx);
 170 }
 171
 172 static inline void wpa_sm_cancel_auth_timeout(struct wpa_sm *sm)
 173 {
 174         sm->ctx->cancel_auth_timeout(sm->ctx->ctx);
 175 }
 176
 177 static inline u8 * wpa_sm_alloc_eapol(struct wpa_sm *sm, u8 type,
 178                                       const void *data, u16 data_len,
 179                                       size_t *msg_len, void **data_pos)
 180 {
 181         return sm->ctx->alloc_eapol(sm->ctx->ctx, type, data, data_len,
 182                                     msg_len, data_pos);
 183 }
 184
 185 static inline int wpa_sm_add_pmkid(struct wpa_sm *sm, const u8 *bssid,
 186                                    const u8 *pmkid)
 187 {
 188         return sm->ctx->add_pmkid(sm->ctx->ctx, bssid, pmkid);
 189 }
 190
 191 static inline int wpa_sm_remove_pmkid(struct wpa_sm *sm, const u8 *bssid,
 192                                       const u8 *pmkid)
 193 {
 194         return sm->ctx->remove_pmkid(sm->ctx->ctx, bssid, pmkid);
 195 }
 196
 197 #endif /* WPA_I_H */