wpa_auth: Make struct wpa_auth_callbacks const
Instead of copying the struct wpa_auth_callbacks, just keep a pointer to it, keep the context pointer separate, and let the user just provide a static const structure. This reduces the attack surface of heap overwrites, since the function pointers move elsewhere. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
Jouni Malinen
parent
30eddf3529
commit
cef8fac04b
7 changed files with 100 additions and 102 deletions
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@ -75,8 +75,8 @@ static const int dot11RSNAConfigSATimeout = 60;
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static inline int wpa_auth_mic_failure_report(
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struct wpa_authenticator *wpa_auth, const u8 *addr)
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{
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if (wpa_auth->cb.mic_failure_report)
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return wpa_auth->cb.mic_failure_report(wpa_auth->cb.ctx, addr);
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if (wpa_auth->cb->mic_failure_report)
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return wpa_auth->cb->mic_failure_report(wpa_auth->cb_ctx, addr);
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return 0;
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}
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@ -84,8 +84,8 @@ static inline int wpa_auth_mic_failure_report(
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static inline void wpa_auth_psk_failure_report(
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struct wpa_authenticator *wpa_auth, const u8 *addr)
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{
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if (wpa_auth->cb.psk_failure_report)
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wpa_auth->cb.psk_failure_report(wpa_auth->cb.ctx, addr);
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if (wpa_auth->cb->psk_failure_report)
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wpa_auth->cb->psk_failure_report(wpa_auth->cb_ctx, addr);
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}
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@ -93,17 +93,17 @@ static inline void wpa_auth_set_eapol(struct wpa_authenticator *wpa_auth,
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const u8 *addr, wpa_eapol_variable var,
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int value)
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{
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if (wpa_auth->cb.set_eapol)
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wpa_auth->cb.set_eapol(wpa_auth->cb.ctx, addr, var, value);
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if (wpa_auth->cb->set_eapol)
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wpa_auth->cb->set_eapol(wpa_auth->cb_ctx, addr, var, value);
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}
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static inline int wpa_auth_get_eapol(struct wpa_authenticator *wpa_auth,
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const u8 *addr, wpa_eapol_variable var)
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{
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if (wpa_auth->cb.get_eapol == NULL)
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if (wpa_auth->cb->get_eapol == NULL)
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return -1;
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return wpa_auth->cb.get_eapol(wpa_auth->cb.ctx, addr, var);
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return wpa_auth->cb->get_eapol(wpa_auth->cb_ctx, addr, var);
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}
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@ -112,19 +112,19 @@ static inline const u8 * wpa_auth_get_psk(struct wpa_authenticator *wpa_auth,
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const u8 *p2p_dev_addr,
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const u8 *prev_psk)
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{
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if (wpa_auth->cb.get_psk == NULL)
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if (wpa_auth->cb->get_psk == NULL)
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return NULL;
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return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, p2p_dev_addr,
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prev_psk);
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return wpa_auth->cb->get_psk(wpa_auth->cb_ctx, addr, p2p_dev_addr,
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prev_psk);
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}
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static inline int wpa_auth_get_msk(struct wpa_authenticator *wpa_auth,
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const u8 *addr, u8 *msk, size_t *len)
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{
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if (wpa_auth->cb.get_msk == NULL)
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if (wpa_auth->cb->get_msk == NULL)
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return -1;
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return wpa_auth->cb.get_msk(wpa_auth->cb.ctx, addr, msk, len);
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return wpa_auth->cb->get_msk(wpa_auth->cb_ctx, addr, msk, len);
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}
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@ -133,19 +133,19 @@ static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
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enum wpa_alg alg, const u8 *addr, int idx,
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u8 *key, size_t key_len)
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{
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if (wpa_auth->cb.set_key == NULL)
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if (wpa_auth->cb->set_key == NULL)
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return -1;
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return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
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key, key_len);
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return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx,
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key, key_len);
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}
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static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
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const u8 *addr, int idx, u8 *seq)
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{
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if (wpa_auth->cb.get_seqnum == NULL)
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if (wpa_auth->cb->get_seqnum == NULL)
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return -1;
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return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
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return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq);
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}
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@ -153,10 +153,10 @@ static inline int
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wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
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const u8 *data, size_t data_len, int encrypt)
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{
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if (wpa_auth->cb.send_eapol == NULL)
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if (wpa_auth->cb->send_eapol == NULL)
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return -1;
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return wpa_auth->cb.send_eapol(wpa_auth->cb.ctx, addr, data, data_len,
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encrypt);
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return wpa_auth->cb->send_eapol(wpa_auth->cb_ctx, addr, data, data_len,
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encrypt);
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}
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@ -164,9 +164,9 @@ wpa_auth_send_eapol(struct wpa_authenticator *wpa_auth, const u8 *addr,
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static inline int wpa_auth_start_ampe(struct wpa_authenticator *wpa_auth,
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const u8 *addr)
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{
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if (wpa_auth->cb.start_ampe == NULL)
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if (wpa_auth->cb->start_ampe == NULL)
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return -1;
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return wpa_auth->cb.start_ampe(wpa_auth->cb.ctx, addr);
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return wpa_auth->cb->start_ampe(wpa_auth->cb_ctx, addr);
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}
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#endif /* CONFIG_MESH */
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@ -175,9 +175,9 @@ int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
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int (*cb)(struct wpa_state_machine *sm, void *ctx),
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void *cb_ctx)
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{
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if (wpa_auth->cb.for_each_sta == NULL)
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if (wpa_auth->cb->for_each_sta == NULL)
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return 0;
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return wpa_auth->cb.for_each_sta(wpa_auth->cb.ctx, cb, cb_ctx);
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return wpa_auth->cb->for_each_sta(wpa_auth->cb_ctx, cb, cb_ctx);
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}
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@ -185,18 +185,18 @@ int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
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int (*cb)(struct wpa_authenticator *a, void *ctx),
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void *cb_ctx)
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{
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if (wpa_auth->cb.for_each_auth == NULL)
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if (wpa_auth->cb->for_each_auth == NULL)
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return 0;
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return wpa_auth->cb.for_each_auth(wpa_auth->cb.ctx, cb, cb_ctx);
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return wpa_auth->cb->for_each_auth(wpa_auth->cb_ctx, cb, cb_ctx);
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}
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void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
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logger_level level, const char *txt)
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{
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if (wpa_auth->cb.logger == NULL)
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if (wpa_auth->cb->logger == NULL)
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return;
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wpa_auth->cb.logger(wpa_auth->cb.ctx, addr, level, txt);
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wpa_auth->cb->logger(wpa_auth->cb_ctx, addr, level, txt);
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}
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@ -207,7 +207,7 @@ void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
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int maxlen;
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va_list ap;
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if (wpa_auth->cb.logger == NULL)
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if (wpa_auth->cb->logger == NULL)
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return;
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maxlen = os_strlen(fmt) + 100;
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@ -228,11 +228,11 @@ void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
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static void wpa_sta_disconnect(struct wpa_authenticator *wpa_auth,
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const u8 *addr)
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{
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if (wpa_auth->cb.disconnect == NULL)
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if (wpa_auth->cb->disconnect == NULL)
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return;
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wpa_printf(MSG_DEBUG, "wpa_sta_disconnect STA " MACSTR, MAC2STR(addr));
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wpa_auth->cb.disconnect(wpa_auth->cb.ctx, addr,
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WLAN_REASON_PREV_AUTH_NOT_VALID);
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wpa_auth->cb->disconnect(wpa_auth->cb_ctx, addr,
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WLAN_REASON_PREV_AUTH_NOT_VALID);
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}
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@ -416,7 +416,8 @@ static struct wpa_group * wpa_group_init(struct wpa_authenticator *wpa_auth,
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*/
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struct wpa_authenticator * wpa_init(const u8 *addr,
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struct wpa_auth_config *conf,
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struct wpa_auth_callbacks *cb)
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const struct wpa_auth_callbacks *cb,
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void *cb_ctx)
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{
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struct wpa_authenticator *wpa_auth;
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@ -425,7 +426,8 @@ struct wpa_authenticator * wpa_init(const u8 *addr,
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return NULL;
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os_memcpy(wpa_auth->addr, addr, ETH_ALEN);
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os_memcpy(&wpa_auth->conf, conf, sizeof(*conf));
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os_memcpy(&wpa_auth->cb, cb, sizeof(*cb));
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wpa_auth->cb = cb;
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wpa_auth->cb_ctx = cb_ctx;
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if (wpa_auth_gen_wpa_ie(wpa_auth)) {
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wpa_printf(MSG_ERROR, "Could not generate WPA IE.");
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@ -1949,7 +1951,7 @@ SM_STATE(WPA_PTK, INITPMK)
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#endif /* CONFIG_IEEE80211R_AP */
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} else {
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wpa_printf(MSG_DEBUG, "WPA: Could not get PMK, get_msk: %p",
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sm->wpa_auth->cb.get_msk);
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sm->wpa_auth->cb->get_msk);
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sm->Disconnect = TRUE;
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return;
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}
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@ -198,7 +198,6 @@ typedef enum {
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} wpa_eapol_variable;
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struct wpa_auth_callbacks {
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void *ctx;
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void (*logger)(void *ctx, const u8 *addr, logger_level level,
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const char *txt);
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void (*disconnect)(void *ctx, const u8 *addr, u16 reason);
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@ -235,7 +234,8 @@ struct wpa_auth_callbacks {
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struct wpa_authenticator * wpa_init(const u8 *addr,
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struct wpa_auth_config *conf,
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struct wpa_auth_callbacks *cb);
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const struct wpa_auth_callbacks *cb,
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void *cb_ctx);
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int wpa_init_keys(struct wpa_authenticator *wpa_auth);
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void wpa_deinit(struct wpa_authenticator *wpa_auth);
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int wpa_reconfig(struct wpa_authenticator *wpa_auth,
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@ -33,21 +33,21 @@ static int wpa_ft_send_rrb_auth_resp(struct wpa_state_machine *sm,
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static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst,
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const u8 *data, size_t data_len)
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{
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if (wpa_auth->cb.send_ether == NULL)
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if (wpa_auth->cb->send_ether == NULL)
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return -1;
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wpa_printf(MSG_DEBUG, "FT: RRB send to " MACSTR, MAC2STR(dst));
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return wpa_auth->cb.send_ether(wpa_auth->cb.ctx, dst, ETH_P_RRB,
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data, data_len);
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return wpa_auth->cb->send_ether(wpa_auth->cb_ctx, dst, ETH_P_RRB,
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data, data_len);
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}
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static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth,
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const u8 *dst, const u8 *data, size_t data_len)
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{
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if (wpa_auth->cb.send_ft_action == NULL)
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if (wpa_auth->cb->send_ft_action == NULL)
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return -1;
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return wpa_auth->cb.send_ft_action(wpa_auth->cb.ctx, dst,
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data, data_len);
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return wpa_auth->cb->send_ft_action(wpa_auth->cb_ctx, dst,
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data, data_len);
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}
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@ -55,19 +55,19 @@ static const u8 * wpa_ft_get_psk(struct wpa_authenticator *wpa_auth,
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const u8 *addr, const u8 *p2p_dev_addr,
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const u8 *prev_psk)
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{
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if (wpa_auth->cb.get_psk == NULL)
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if (wpa_auth->cb->get_psk == NULL)
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return NULL;
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return wpa_auth->cb.get_psk(wpa_auth->cb.ctx, addr, p2p_dev_addr,
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prev_psk);
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return wpa_auth->cb->get_psk(wpa_auth->cb_ctx, addr, p2p_dev_addr,
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prev_psk);
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}
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static struct wpa_state_machine *
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wpa_ft_add_sta(struct wpa_authenticator *wpa_auth, const u8 *sta_addr)
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{
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if (wpa_auth->cb.add_sta == NULL)
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if (wpa_auth->cb->add_sta == NULL)
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return NULL;
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return wpa_auth->cb.add_sta(wpa_auth->cb.ctx, sta_addr);
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return wpa_auth->cb->add_sta(wpa_auth->cb_ctx, sta_addr);
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}
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@ -75,12 +75,12 @@ static int wpa_ft_add_tspec(struct wpa_authenticator *wpa_auth,
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const u8 *sta_addr,
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u8 *tspec_ie, size_t tspec_ielen)
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{
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if (wpa_auth->cb.add_tspec == NULL) {
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if (wpa_auth->cb->add_tspec == NULL) {
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wpa_printf(MSG_DEBUG, "FT: add_tspec is not initialized");
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return -1;
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}
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return wpa_auth->cb.add_tspec(wpa_auth->cb.ctx, sta_addr, tspec_ie,
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tspec_ielen);
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return wpa_auth->cb->add_tspec(wpa_auth->cb_ctx, sta_addr, tspec_ie,
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tspec_ielen);
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}
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@ -418,9 +418,9 @@ int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
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static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
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const u8 *addr, int idx, u8 *seq)
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{
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if (wpa_auth->cb.get_seqnum == NULL)
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if (wpa_auth->cb->get_seqnum == NULL)
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return -1;
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return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
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return wpa_auth->cb->get_seqnum(wpa_auth->cb_ctx, addr, idx, seq);
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}
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@ -773,10 +773,10 @@ static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
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enum wpa_alg alg, const u8 *addr, int idx,
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u8 *key, size_t key_len)
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{
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if (wpa_auth->cb.set_key == NULL)
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if (wpa_auth->cb->set_key == NULL)
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return -1;
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return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
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key, key_len);
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return wpa_auth->cb->set_key(wpa_auth->cb_ctx, vlan_id, alg, addr, idx,
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key, key_len);
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}
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@ -595,7 +595,27 @@ static int hostapd_wpa_auth_add_tspec(void *ctx, const u8 *sta_addr,
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int hostapd_setup_wpa(struct hostapd_data *hapd)
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{
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struct wpa_auth_config _conf;
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struct wpa_auth_callbacks cb;
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static const struct wpa_auth_callbacks cb = {
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.logger = hostapd_wpa_auth_logger,
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.disconnect = hostapd_wpa_auth_disconnect,
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.mic_failure_report = hostapd_wpa_auth_mic_failure_report,
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.psk_failure_report = hostapd_wpa_auth_psk_failure_report,
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.set_eapol = hostapd_wpa_auth_set_eapol,
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.get_eapol = hostapd_wpa_auth_get_eapol,
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.get_psk = hostapd_wpa_auth_get_psk,
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.get_msk = hostapd_wpa_auth_get_msk,
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.set_key = hostapd_wpa_auth_set_key,
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.get_seqnum = hostapd_wpa_auth_get_seqnum,
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.send_eapol = hostapd_wpa_auth_send_eapol,
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.for_each_sta = hostapd_wpa_auth_for_each_sta,
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.for_each_auth = hostapd_wpa_auth_for_each_auth,
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.send_ether = hostapd_wpa_auth_send_ether,
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#ifdef CONFIG_IEEE80211R_AP
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.send_ft_action = hostapd_wpa_auth_send_ft_action,
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.add_sta = hostapd_wpa_auth_add_sta,
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.add_tspec = hostapd_wpa_auth_add_tspec,
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#endif /* CONFIG_IEEE80211R_AP */
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};
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const u8 *wpa_ie;
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size_t wpa_ie_len;
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@ -604,28 +624,7 @@ int hostapd_setup_wpa(struct hostapd_data *hapd)
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_conf.tx_status = 1;
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if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_MLME)
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_conf.ap_mlme = 1;
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os_memset(&cb, 0, sizeof(cb));
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cb.ctx = hapd;
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cb.logger = hostapd_wpa_auth_logger;
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cb.disconnect = hostapd_wpa_auth_disconnect;
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cb.mic_failure_report = hostapd_wpa_auth_mic_failure_report;
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cb.psk_failure_report = hostapd_wpa_auth_psk_failure_report;
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cb.set_eapol = hostapd_wpa_auth_set_eapol;
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cb.get_eapol = hostapd_wpa_auth_get_eapol;
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cb.get_psk = hostapd_wpa_auth_get_psk;
|
||||
cb.get_msk = hostapd_wpa_auth_get_msk;
|
||||
cb.set_key = hostapd_wpa_auth_set_key;
|
||||
cb.get_seqnum = hostapd_wpa_auth_get_seqnum;
|
||||
cb.send_eapol = hostapd_wpa_auth_send_eapol;
|
||||
cb.for_each_sta = hostapd_wpa_auth_for_each_sta;
|
||||
cb.for_each_auth = hostapd_wpa_auth_for_each_auth;
|
||||
cb.send_ether = hostapd_wpa_auth_send_ether;
|
||||
#ifdef CONFIG_IEEE80211R_AP
|
||||
cb.send_ft_action = hostapd_wpa_auth_send_ft_action;
|
||||
cb.add_sta = hostapd_wpa_auth_add_sta;
|
||||
cb.add_tspec = hostapd_wpa_auth_add_tspec;
|
||||
#endif /* CONFIG_IEEE80211R_AP */
|
||||
hapd->wpa_auth = wpa_init(hapd->own_addr, &_conf, &cb);
|
||||
hapd->wpa_auth = wpa_init(hapd->own_addr, &_conf, &cb, hapd);
|
||||
if (hapd->wpa_auth == NULL) {
|
||||
wpa_printf(MSG_ERROR, "WPA initialization failed.");
|
||||
return -1;
|
||||
|
|
|
|||
|
|
@ -203,7 +203,8 @@ struct wpa_authenticator {
|
|||
struct wpa_stsl_negotiation *stsl_negotiations;
|
||||
|
||||
struct wpa_auth_config conf;
|
||||
struct wpa_auth_callbacks cb;
|
||||
const struct wpa_auth_callbacks *cb;
|
||||
void *cb_ctx;
|
||||
|
||||
u8 *wpa_ie;
|
||||
size_t wpa_ie_len;
|
||||
|
|
|
|||
|
|
@ -408,7 +408,15 @@ static int ibss_rsn_auth_init_group(struct ibss_rsn *ibss_rsn,
|
|||
const u8 *own_addr, struct wpa_ssid *ssid)
|
||||
{
|
||||
struct wpa_auth_config conf;
|
||||
struct wpa_auth_callbacks cb;
|
||||
static const struct wpa_auth_callbacks cb = {
|
||||
.logger = auth_logger,
|
||||
.set_eapol = auth_set_eapol,
|
||||
.send_eapol = auth_send_eapol,
|
||||
.get_psk = auth_get_psk,
|
||||
.set_key = auth_set_key,
|
||||
.for_each_sta = auth_for_each_sta,
|
||||
.disconnect = ibss_rsn_disconnect,
|
||||
};
|
||||
|
||||
wpa_printf(MSG_DEBUG, "AUTH: Initializing group state machine");
|
||||
|
||||
|
|
@ -421,17 +429,7 @@ static int ibss_rsn_auth_init_group(struct ibss_rsn *ibss_rsn,
|
|||
conf.eapol_version = 2;
|
||||
conf.wpa_group_rekey = ssid->group_rekey ? ssid->group_rekey : 600;
|
||||
|
||||
os_memset(&cb, 0, sizeof(cb));
|
||||
cb.ctx = ibss_rsn;
|
||||
cb.logger = auth_logger;
|
||||
cb.set_eapol = auth_set_eapol;
|
||||
cb.send_eapol = auth_send_eapol;
|
||||
cb.get_psk = auth_get_psk;
|
||||
cb.set_key = auth_set_key;
|
||||
cb.for_each_sta = auth_for_each_sta;
|
||||
cb.disconnect = ibss_rsn_disconnect;
|
||||
|
||||
ibss_rsn->auth_group = wpa_init(own_addr, &conf, &cb);
|
||||
ibss_rsn->auth_group = wpa_init(own_addr, &conf, &cb, ibss_rsn);
|
||||
if (ibss_rsn->auth_group == NULL) {
|
||||
wpa_printf(MSG_DEBUG, "AUTH: wpa_init() failed");
|
||||
return -1;
|
||||
|
|
|
|||
|
|
@ -140,7 +140,12 @@ static int __mesh_rsn_auth_init(struct mesh_rsn *rsn, const u8 *addr,
|
|||
enum mfp_options ieee80211w)
|
||||
{
|
||||
struct wpa_auth_config conf;
|
||||
struct wpa_auth_callbacks cb;
|
||||
static const struct wpa_auth_callbacks cb = {
|
||||
.logger = auth_logger,
|
||||
.get_psk = auth_get_psk,
|
||||
.set_key = auth_set_key,
|
||||
.start_ampe = auth_start_ampe,
|
||||
};
|
||||
u8 seq[6] = {};
|
||||
|
||||
wpa_printf(MSG_DEBUG, "AUTH: Initializing group state machine");
|
||||
|
|
@ -159,14 +164,7 @@ static int __mesh_rsn_auth_init(struct mesh_rsn *rsn, const u8 *addr,
|
|||
conf.group_mgmt_cipher = rsn->mgmt_group_cipher;
|
||||
#endif /* CONFIG_IEEE80211W */
|
||||
|
||||
os_memset(&cb, 0, sizeof(cb));
|
||||
cb.ctx = rsn;
|
||||
cb.logger = auth_logger;
|
||||
cb.get_psk = auth_get_psk;
|
||||
cb.set_key = auth_set_key;
|
||||
cb.start_ampe = auth_start_ampe;
|
||||
|
||||
rsn->auth = wpa_init(addr, &conf, &cb);
|
||||
rsn->auth = wpa_init(addr, &conf, &cb, rsn);
|
||||
if (rsn->auth == NULL) {
|
||||
wpa_printf(MSG_DEBUG, "AUTH: wpa_init() failed");
|
||||
return -1;
|
||||
|
|
|
|||
Loading…
Reference in a new issue