src/rsn_supp/wpa_i.h

   1 /*
   2  * Internal WPA/RSN supplicant state machine definitions
   3  * Copyright (c) 2004-2010, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #ifndef WPA_I_H
  10 #define WPA_I_H
  11
  12 #include "utils/list.h"
  13
  14 struct wpa_peerkey;
  15 struct wpa_tdls_peer;
  16 struct wpa_eapol_key;
  17
  18 /**
  19  * struct wpa_sm - Internal WPA state machine data
  20  */
  21 struct wpa_sm {
  22         u8 pmk[PMK_LEN];
  23         size_t pmk_len;
  24         struct wpa_ptk ptk, tptk;
  25         int ptk_set, tptk_set;
  26         u8 snonce[WPA_NONCE_LEN];
  27         u8 anonce[WPA_NONCE_LEN]; /* ANonce from the last 1/4 msg */
  28         int renew_snonce;
  29         u8 rx_replay_counter[WPA_REPLAY_COUNTER_LEN];
  30         int rx_replay_counter_set;
  31         u8 request_counter[WPA_REPLAY_COUNTER_LEN];
  32
  33         struct eapol_sm *eapol; /* EAPOL state machine from upper level code */
  34
  35         struct rsn_pmksa_cache *pmksa; /* PMKSA cache */
  36         struct rsn_pmksa_cache_entry *cur_pmksa; /* current PMKSA entry */
  37         struct dl_list pmksa_candidates;
  38
  39         struct l2_packet_data *l2_preauth;
  40         struct l2_packet_data *l2_preauth_br;
  41         struct l2_packet_data *l2_tdls;
  42         u8 preauth_bssid[ETH_ALEN]; /* current RSN pre-auth peer or
  43                                      * 00:00:00:00:00:00 if no pre-auth is
  44                                      * in progress */
  45         struct eapol_sm *preauth_eapol;
  46
  47         struct wpa_sm_ctx *ctx;
  48
  49         void *scard_ctx; /* context for smartcard callbacks */
  50         int fast_reauth; /* whether EAP fast re-authentication is enabled */
  51
  52         void *network_ctx;
  53         int peerkey_enabled;
  54         int allowed_pairwise_cipher; /* bitfield of WPA_CIPHER_* */
  55         int proactive_key_caching;
  56         int eap_workaround;
  57         void *eap_conf_ctx;
  58         u8 ssid[32];
  59         size_t ssid_len;
  60         int wpa_ptk_rekey;
  61         int p2p;
  62
  63         u8 own_addr[ETH_ALEN];
  64         const char *ifname;
  65         const char *bridge_ifname;
  66         u8 bssid[ETH_ALEN];
  67
  68         unsigned int dot11RSNAConfigPMKLifetime;
  69         unsigned int dot11RSNAConfigPMKReauthThreshold;
  70         unsigned int dot11RSNAConfigSATimeout;
  71
  72         unsigned int dot11RSNA4WayHandshakeFailures;
  73
  74         /* Selected configuration (based on Beacon/ProbeResp WPA IE) */
  75         unsigned int proto;
  76         unsigned int pairwise_cipher;
  77         unsigned int group_cipher;
  78         unsigned int key_mgmt;
  79         unsigned int mgmt_group_cipher;
  80
  81         int rsn_enabled; /* Whether RSN is enabled in configuration */
  82         int mfp; /* 0 = disabled, 1 = optional, 2 = mandatory */
  83
  84         u8 *assoc_wpa_ie; /* Own WPA/RSN IE from (Re)AssocReq */
  85         size_t assoc_wpa_ie_len;
  86         u8 *ap_wpa_ie, *ap_rsn_ie;
  87         size_t ap_wpa_ie_len, ap_rsn_ie_len;
  88
  89 #ifdef CONFIG_PEERKEY
  90         struct wpa_peerkey *peerkey;
  91 #endif /* CONFIG_PEERKEY */
  92 #ifdef CONFIG_TDLS
  93         struct wpa_tdls_peer *tdls;
  94         int tdls_prohibited;
  95         int tdls_disabled;
  96
  97         /* The driver supports TDLS */
  98         int tdls_supported;
  99
 100         /*
 101          * The driver requires explicit discovery/setup/teardown frames sent
 102          * to it via tdls_mgmt.
 103          */
 104         int tdls_external_setup;
 105 #endif /* CONFIG_TDLS */
 106
 107 #ifdef CONFIG_IEEE80211R
 108         u8 xxkey[PMK_LEN]; /* PSK or the second 256 bits of MSK */
 109         size_t xxkey_len;
 110         u8 pmk_r0[PMK_LEN];
 111         u8 pmk_r0_name[WPA_PMK_NAME_LEN];
 112         u8 pmk_r1[PMK_LEN];
 113         u8 pmk_r1_name[WPA_PMK_NAME_LEN];
 114         u8 mobility_domain[MOBILITY_DOMAIN_ID_LEN];
 115         u8 r0kh_id[FT_R0KH_ID_MAX_LEN];
 116         size_t r0kh_id_len;
 117         u8 r1kh_id[FT_R1KH_ID_LEN];
 118         int ft_completed;
 119         int over_the_ds_in_progress;
 120         u8 target_ap[ETH_ALEN]; /* over-the-DS target AP */
 121         int set_ptk_after_assoc;
 122         u8 mdie_ft_capab; /* FT Capability and Policy from target AP MDIE */
 123         u8 *assoc_resp_ies; /* MDIE and FTIE from (Re)Association Response */
 124         size_t assoc_resp_ies_len;
 125 #endif /* CONFIG_IEEE80211R */
 126
 127 #ifdef CONFIG_P2P
 128         u8 p2p_ip_addr[3 * 4];
 129 #endif /* CONFIG_P2P */
 130 };
 131
 132
 133 static inline void wpa_sm_set_state(struct wpa_sm *sm, enum wpa_states state)
 134 {
 135         WPA_ASSERT(sm->ctx->set_state);
 136         sm->ctx->set_state(sm->ctx->ctx, state);
 137 }
 138
 139 static inline enum wpa_states wpa_sm_get_state(struct wpa_sm *sm)
 140 {
 141         WPA_ASSERT(sm->ctx->get_state);
 142         return sm->ctx->get_state(sm->ctx->ctx);
 143 }
 144
 145 static inline void wpa_sm_deauthenticate(struct wpa_sm *sm, int reason_code)
 146 {
 147         WPA_ASSERT(sm->ctx->deauthenticate);
 148         sm->ctx->deauthenticate(sm->ctx->ctx, reason_code);
 149 }
 150
 151 static inline int wpa_sm_set_key(struct wpa_sm *sm, enum wpa_alg alg,
 152                                  const u8 *addr, int key_idx, int set_tx,
 153                                  const u8 *seq, size_t seq_len,
 154                                  const u8 *key, size_t key_len)
 155 {
 156         WPA_ASSERT(sm->ctx->set_key);
 157         return sm->ctx->set_key(sm->ctx->ctx, alg, addr, key_idx, set_tx,
 158                                 seq, seq_len, key, key_len);
 159 }
 160
 161 static inline void * wpa_sm_get_network_ctx(struct wpa_sm *sm)
 162 {
 163         WPA_ASSERT(sm->ctx->get_network_ctx);
 164         return sm->ctx->get_network_ctx(sm->ctx->ctx);
 165 }
 166
 167 static inline int wpa_sm_get_bssid(struct wpa_sm *sm, u8 *bssid)
 168 {
 169         WPA_ASSERT(sm->ctx->get_bssid);
 170         return sm->ctx->get_bssid(sm->ctx->ctx, bssid);
 171 }
 172
 173 static inline int wpa_sm_ether_send(struct wpa_sm *sm, const u8 *dest,
 174                                     u16 proto, const u8 *buf, size_t len)
 175 {
 176         WPA_ASSERT(sm->ctx->ether_send);
 177         return sm->ctx->ether_send(sm->ctx->ctx, dest, proto, buf, len);
 178 }
 179
 180 static inline int wpa_sm_get_beacon_ie(struct wpa_sm *sm)
 181 {
 182         WPA_ASSERT(sm->ctx->get_beacon_ie);
 183         return sm->ctx->get_beacon_ie(sm->ctx->ctx);
 184 }
 185
 186 static inline void wpa_sm_cancel_auth_timeout(struct wpa_sm *sm)
 187 {
 188         WPA_ASSERT(sm->ctx->cancel_auth_timeout);
 189         sm->ctx->cancel_auth_timeout(sm->ctx->ctx);
 190 }
 191
 192 static inline u8 * wpa_sm_alloc_eapol(struct wpa_sm *sm, u8 type,
 193                                       const void *data, u16 data_len,
 194                                       size_t *msg_len, void **data_pos)
 195 {
 196         WPA_ASSERT(sm->ctx->alloc_eapol);
 197         return sm->ctx->alloc_eapol(sm->ctx->ctx, type, data, data_len,
 198                                     msg_len, data_pos);
 199 }
 200
 201 static inline int wpa_sm_add_pmkid(struct wpa_sm *sm, const u8 *bssid,
 202                                    const u8 *pmkid)
 203 {
 204         WPA_ASSERT(sm->ctx->add_pmkid);
 205         return sm->ctx->add_pmkid(sm->ctx->ctx, bssid, pmkid);
 206 }
 207
 208 static inline int wpa_sm_remove_pmkid(struct wpa_sm *sm, const u8 *bssid,
 209                                       const u8 *pmkid)
 210 {
 211         WPA_ASSERT(sm->ctx->remove_pmkid);
 212         return sm->ctx->remove_pmkid(sm->ctx->ctx, bssid, pmkid);
 213 }
 214
 215 static inline int wpa_sm_mlme_setprotection(struct wpa_sm *sm, const u8 *addr,
 216                                             int protect_type, int key_type)
 217 {
 218         WPA_ASSERT(sm->ctx->mlme_setprotection);
 219         return sm->ctx->mlme_setprotection(sm->ctx->ctx, addr, protect_type,
 220                                            key_type);
 221 }
 222
 223 static inline int wpa_sm_update_ft_ies(struct wpa_sm *sm, const u8 *md,
 224                                        const u8 *ies, size_t ies_len)
 225 {
 226         if (sm->ctx->update_ft_ies)
 227                 return sm->ctx->update_ft_ies(sm->ctx->ctx, md, ies, ies_len);
 228         return -1;
 229 }
 230
 231 static inline int wpa_sm_send_ft_action(struct wpa_sm *sm, u8 action,
 232                                         const u8 *target_ap,
 233                                         const u8 *ies, size_t ies_len)
 234 {
 235         if (sm->ctx->send_ft_action)
 236                 return sm->ctx->send_ft_action(sm->ctx->ctx, action, target_ap,
 237                                                ies, ies_len);
 238         return -1;
 239 }
 240
 241 static inline int wpa_sm_mark_authenticated(struct wpa_sm *sm,
 242                                             const u8 *target_ap)
 243 {
 244         if (sm->ctx->mark_authenticated)
 245                 return sm->ctx->mark_authenticated(sm->ctx->ctx, target_ap);
 246         return -1;
 247 }
 248
 249 static inline void wpa_sm_set_rekey_offload(struct wpa_sm *sm)
 250 {
 251         if (!sm->ctx->set_rekey_offload)
 252                 return;
 253         sm->ctx->set_rekey_offload(sm->ctx->ctx, sm->ptk.kek,
 254                                    sm->ptk.kck, sm->rx_replay_counter);
 255 }
 256
 257 #ifdef CONFIG_TDLS
 258 static inline int wpa_sm_tdls_get_capa(struct wpa_sm *sm,
 259                                        int *tdls_supported,
 260                                        int *tdls_ext_setup)
 261 {
 262         if (sm->ctx->tdls_get_capa)
 263                 return sm->ctx->tdls_get_capa(sm->ctx->ctx, tdls_supported,
 264                                               tdls_ext_setup);
 265         return -1;
 266 }
 267
 268 static inline int wpa_sm_send_tdls_mgmt(struct wpa_sm *sm, const u8 *dst,
 269                                         u8 action_code, u8 dialog_token,
 270                                         u16 status_code, u32 peer_capab,
 271                                         int initiator, const u8 *buf,
 272                                         size_t len)
 273 {
 274         if (sm->ctx->send_tdls_mgmt)
 275                 return sm->ctx->send_tdls_mgmt(sm->ctx->ctx, dst, action_code,
 276                                                dialog_token, status_code,
 277                                                peer_capab, initiator, buf,
 278                                                len);
 279         return -1;
 280 }
 281
 282 static inline int wpa_sm_tdls_oper(struct wpa_sm *sm, int oper,
 283                                    const u8 *peer)
 284 {
 285         if (sm->ctx->tdls_oper)
 286                 return sm->ctx->tdls_oper(sm->ctx->ctx, oper, peer);
 287         return -1;
 288 }
 289
 290 static inline int
 291 wpa_sm_tdls_peer_addset(struct wpa_sm *sm, const u8 *addr, int add,
 292                         u16 aid, u16 capability, const u8 *supp_rates,
 293                         size_t supp_rates_len,
 294                         const struct ieee80211_ht_capabilities *ht_capab,
 295                         const struct ieee80211_vht_capabilities *vht_capab,
 296                         u8 qosinfo, int wmm, const u8 *ext_capab,
 297                         size_t ext_capab_len, const u8 *supp_channels,
 298                         size_t supp_channels_len, const u8 *supp_oper_classes,
 299                         size_t supp_oper_classes_len)
 300 {
 301         if (sm->ctx->tdls_peer_addset)
 302                 return sm->ctx->tdls_peer_addset(sm->ctx->ctx, addr, add,
 303                                                  aid, capability, supp_rates,
 304                                                  supp_rates_len, ht_capab,
 305                                                  vht_capab, qosinfo, wmm,
 306                                                  ext_capab, ext_capab_len,
 307                                                  supp_channels,
 308                                                  supp_channels_len,
 309                                                  supp_oper_classes,
 310                                                  supp_oper_classes_len);
 311         return -1;
 312 }
 313 #endif /* CONFIG_TDLS */
 314
 315 static inline int wpa_sm_key_mgmt_set_pmk(struct wpa_sm *sm,
 316                                           const u8 *pmk, size_t pmk_len)
 317 {
 318         if (!sm->proactive_key_caching)
 319                 return 0;
 320         if (!sm->ctx->key_mgmt_set_pmk)
 321                 return -1;
 322         return sm->ctx->key_mgmt_set_pmk(sm->ctx->ctx, pmk, pmk_len);
 323 }
 324
 325 void wpa_eapol_key_send(struct wpa_sm *sm, const u8 *kck,
 326                         int ver, const u8 *dest, u16 proto,
 327                         u8 *msg, size_t msg_len, u8 *key_mic);
 328 int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst,
 329                                const struct wpa_eapol_key *key,
 330                                int ver, const u8 *nonce,
 331                                const u8 *wpa_ie, size_t wpa_ie_len,
 332                                struct wpa_ptk *ptk);
 333 int wpa_supplicant_send_4_of_4(struct wpa_sm *sm, const unsigned char *dst,
 334                                const struct wpa_eapol_key *key,
 335                                u16 ver, u16 key_info,
 336                                struct wpa_ptk *ptk);
 337
 338 int wpa_derive_ptk_ft(struct wpa_sm *sm, const unsigned char *src_addr,
 339                       const struct wpa_eapol_key *key,
 340                       struct wpa_ptk *ptk, size_t ptk_len);
 341
 342 void wpa_tdls_assoc(struct wpa_sm *sm);
 343 void wpa_tdls_disassoc(struct wpa_sm *sm);
 344
 345 #endif /* WPA_I_H */