wpa_i.h

Go to the documentation of this file.

#ifndef WPA_I_H
#define WPA_I_H

#define WPA_NONCE_LEN 32
#define WPA_REPLAY_COUNTER_LEN 8


struct rsn_pmksa_candidate;

struct wpa_ptk {
        u8 kck[16]; /* EAPOL-Key Key Confirmation Key (KCK) */
        u8 kek[16]; /* EAPOL-Key Key Encryption Key (KEK) */
        u8 tk1[16]; /* Temporal Key 1 (TK1) */
        union {
                u8 tk2[16]; /* Temporal Key 2 (TK2) */
                struct {
                        u8 tx_mic_key[8];
                        u8 rx_mic_key[8];
                } auth;
        } u;
} __attribute__ ((packed));


struct rsn_pmksa_cache {
        struct rsn_pmksa_cache *next;
        u8 pmkid[PMKID_LEN];
        u8 pmk[PMK_LEN];
        size_t pmk_len;
        time_t expiration;
        time_t reauth_time;
        int akmp; /* WPA_KEY_MGMT_* */
        u8 aa[ETH_ALEN];
        struct wpa_ssid *ssid;
        int opportunistic;
};


struct wpa_sm {
        u8 pmk[PMK_LEN];
        size_t pmk_len;
        struct wpa_ptk ptk, tptk;
        int ptk_set, tptk_set;
        u8 snonce[WPA_NONCE_LEN];
        u8 anonce[WPA_NONCE_LEN]; /* ANonce from the last 1/4 msg */
        int renew_snonce;
        u8 rx_replay_counter[WPA_REPLAY_COUNTER_LEN];
        int rx_replay_counter_set;
        u8 request_counter[WPA_REPLAY_COUNTER_LEN];

        struct eapol_sm *eapol; /* EAPOL state machine from upper level code */

        struct rsn_pmksa_cache *pmksa; /* PMKSA cache */
        struct rsn_pmksa_cache *cur_pmksa; /* current PMKSA entry */
        int pmksa_count; /* number of entries in PMKSA cache */
        struct rsn_pmksa_candidate *pmksa_candidates;

        struct l2_packet_data *l2_preauth;
        u8 preauth_bssid[ETH_ALEN]; /* current RSN pre-auth peer or
                                     * 00:00:00:00:00:00 if no pre-auth is
                                     * in progress */
        struct eapol_sm *preauth_eapol;

        struct wpa_sm_ctx *ctx;

        void *scard_ctx; /* context for smartcard callbacks */
        int fast_reauth; /* whether EAP fast re-authentication is enabled */

        struct wpa_ssid *cur_ssid;

        u8 own_addr[ETH_ALEN];
        const char *ifname;
        u8 bssid[ETH_ALEN];

        unsigned int dot11RSNAConfigPMKLifetime;
        unsigned int dot11RSNAConfigPMKReauthThreshold;
        unsigned int dot11RSNAConfigSATimeout;

        unsigned int dot11RSNA4WayHandshakeFailures;

        /* Selected configuration (based on Beacon/ProbeResp WPA IE) */
        unsigned int proto;
        unsigned int pairwise_cipher;
        unsigned int group_cipher;
        unsigned int key_mgmt;

        u8 *assoc_wpa_ie; /* Own WPA/RSN IE from (Re)AssocReq */
        size_t assoc_wpa_ie_len;
        u8 *ap_wpa_ie, *ap_rsn_ie;
        size_t ap_wpa_ie_len, ap_rsn_ie_len;
};


static inline void wpa_sm_set_state(struct wpa_sm *sm, wpa_states state)
{
        sm->ctx->set_state(sm->ctx->ctx, state);
}

static inline wpa_states wpa_sm_get_state(struct wpa_sm *sm)
{
        return sm->ctx->get_state(sm->ctx->ctx);
}

static inline void wpa_sm_req_scan(struct wpa_sm *sm, int sec, int usec)
{
        sm->ctx->req_scan(sm->ctx->ctx, sec, usec);
}

static inline void wpa_sm_deauthenticate(struct wpa_sm *sm, int reason_code)
{
        sm->ctx->deauthenticate(sm->ctx->ctx, reason_code);
}

static inline void wpa_sm_disassociate(struct wpa_sm *sm, int reason_code)
{
        sm->ctx->disassociate(sm->ctx->ctx, reason_code);
}

static inline int wpa_sm_set_key(struct wpa_sm *sm, wpa_alg alg,
                                 const u8 *addr, int key_idx, int set_tx,
                                 const u8 *seq, size_t seq_len,
                                 const u8 *key, size_t key_len)
{
        return sm->ctx->set_key(sm->ctx->ctx, alg, addr, key_idx, set_tx,
                                seq, seq_len, key, key_len);
}

static inline struct wpa_ssid * wpa_sm_get_ssid(struct wpa_sm *sm)
{
        return sm->ctx->get_ssid(sm->ctx->ctx);
}

static inline int wpa_sm_get_bssid(struct wpa_sm *sm, u8 *bssid)
{
        return sm->ctx->get_bssid(sm->ctx->ctx, bssid);
}

static inline int wpa_sm_ether_send(struct wpa_sm *sm, const u8 *dest,
                                    u16 proto, const u8 *buf, size_t len)
{
        return sm->ctx->ether_send(sm->ctx->ctx, dest, proto, buf, len);
}

static inline int wpa_sm_get_beacon_ie(struct wpa_sm *sm)
{
        return sm->ctx->get_beacon_ie(sm->ctx->ctx);
}

static inline void wpa_sm_cancel_auth_timeout(struct wpa_sm *sm)
{
        sm->ctx->cancel_auth_timeout(sm->ctx->ctx);
}

static inline u8 * wpa_sm_alloc_eapol(struct wpa_sm *sm, u8 type,
                                      const void *data, u16 data_len,
                                      size_t *msg_len, void **data_pos)
{
        return sm->ctx->alloc_eapol(sm->ctx->ctx, type, data, data_len,
                                    msg_len, data_pos);
}

static inline int wpa_sm_add_pmkid(struct wpa_sm *sm, const u8 *bssid,
                                   const u8 *pmkid)
{
        return sm->ctx->add_pmkid(sm->ctx->ctx, bssid, pmkid);
}

static inline int wpa_sm_remove_pmkid(struct wpa_sm *sm, const u8 *bssid,
                                      const u8 *pmkid)
{
        return sm->ctx->remove_pmkid(sm->ctx->ctx, bssid, pmkid);
}

#endif /* WPA_I_H */

---