DPP: Authentication exchange retries and channel iteration in hostapd
This extends hostapd with previoiusly implemented wpa_supplicant functionality to retry DPP Authentication Request/Response and to iterate over possible negotiation channels. Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This commit is contained in:
Jouni Malinen
Jouni Malinen
parent
c5cc7a59ac
commit
80f71b71d5
3 changed files with 335 additions and 30 deletions
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@ -103,6 +103,14 @@ int hostapd_drv_send_action_addr3_ap(struct hostapd_data *hapd,
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unsigned int freq,
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unsigned int wait, const u8 *dst,
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const u8 *data, size_t len);
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static inline void
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hostapd_drv_send_action_cancel_wait(struct hostapd_data *hapd)
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{
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if (!hapd->driver || !hapd->driver->send_action_cancel_wait ||
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!hapd->drv_priv)
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return;
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hapd->driver->send_action_cancel_wait(hapd->drv_priv);
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}
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int hostapd_add_sta_node(struct hostapd_data *hapd, const u8 *addr,
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u16 auth_alg);
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int hostapd_sta_auth(struct hostapd_data *hapd, const u8 *addr,
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@ -20,7 +20,10 @@
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#include "dpp_hostapd.h"
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static void hostapd_dpp_reply_wait_timeout(void *eloop_ctx, void *timeout_ctx);
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static void hostapd_dpp_auth_success(struct hostapd_data *hapd, int initiator);
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static void hostapd_dpp_init_timeout(void *eloop_ctx, void *timeout_ctx);
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static int hostapd_dpp_auth_init_next(struct hostapd_data *hapd);
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static const u8 broadcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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@ -278,9 +281,68 @@ int hostapd_dpp_bootstrap_info(struct hostapd_data *hapd, int id,
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}
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static void hostapd_dpp_auth_resp_retry_timeout(void *eloop_ctx,
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void *timeout_ctx)
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{
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struct hostapd_data *hapd = eloop_ctx;
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struct dpp_authentication *auth = hapd->dpp_auth;
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if (!auth || !auth->resp_msg)
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return;
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wpa_printf(MSG_DEBUG,
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"DPP: Retry Authentication Response after timeout");
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wpa_msg(hapd->msg_ctx, MSG_INFO, DPP_EVENT_TX "dst=" MACSTR
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" freq=%u type=%d",
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MAC2STR(auth->peer_mac_addr), auth->curr_freq,
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DPP_PA_AUTHENTICATION_RESP);
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hostapd_drv_send_action(hapd, auth->curr_freq, 500, auth->peer_mac_addr,
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wpabuf_head(auth->resp_msg),
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wpabuf_len(auth->resp_msg));
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}
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static void hostapd_dpp_auth_resp_retry(struct hostapd_data *hapd)
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{
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struct dpp_authentication *auth = hapd->dpp_auth;
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unsigned int wait_time, max_tries;
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if (!auth || !auth->resp_msg)
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return;
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if (hapd->dpp_resp_max_tries)
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max_tries = hapd->dpp_resp_max_tries;
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else
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max_tries = 5;
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auth->auth_resp_tries++;
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if (auth->auth_resp_tries >= max_tries) {
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wpa_printf(MSG_INFO,
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"DPP: No confirm received from initiator - stopping exchange");
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hostapd_drv_send_action_cancel_wait(hapd);
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dpp_auth_deinit(hapd->dpp_auth);
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hapd->dpp_auth = NULL;
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return;
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}
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if (hapd->dpp_resp_retry_time)
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wait_time = hapd->dpp_resp_retry_time;
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else
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wait_time = 1000;
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wpa_printf(MSG_DEBUG,
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"DPP: Schedule retransmission of Authentication Response frame in %u ms",
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wait_time);
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eloop_cancel_timeout(hostapd_dpp_auth_resp_retry_timeout, hapd, NULL);
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eloop_register_timeout(wait_time / 1000,
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(wait_time % 1000) * 1000,
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hostapd_dpp_auth_resp_retry_timeout, hapd, NULL);
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}
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void hostapd_dpp_tx_status(struct hostapd_data *hapd, const u8 *dst,
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const u8 *data, size_t data_len, int ok)
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{
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struct dpp_authentication *auth = hapd->dpp_auth;
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wpa_printf(MSG_DEBUG, "DPP: TX status: dst=" MACSTR " ok=%d",
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MAC2STR(dst), ok);
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wpa_msg(hapd->msg_ctx, MSG_INFO, DPP_EVENT_TX_STATUS "dst=" MACSTR
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@ -295,15 +357,133 @@ void hostapd_dpp_tx_status(struct hostapd_data *hapd, const u8 *dst,
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if (hapd->dpp_auth->remove_on_tx_status) {
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wpa_printf(MSG_DEBUG,
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"DPP: Terminate authentication exchange due to an earlier error");
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eloop_cancel_timeout(hostapd_dpp_init_timeout, hapd, NULL);
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eloop_cancel_timeout(hostapd_dpp_reply_wait_timeout,
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hapd, NULL);
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eloop_cancel_timeout(hostapd_dpp_auth_resp_retry_timeout, hapd,
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NULL);
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hostapd_drv_send_action_cancel_wait(hapd);
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dpp_auth_deinit(hapd->dpp_auth);
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hapd->dpp_auth = NULL;
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return;
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}
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if (hapd->dpp_auth_ok_on_ack) {
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hapd->dpp_auth_ok_on_ack = 0;
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if (hapd->dpp_auth_ok_on_ack)
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hostapd_dpp_auth_success(hapd, 1);
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if (!is_broadcast_ether_addr(dst) && !ok) {
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wpa_printf(MSG_DEBUG,
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"DPP: Unicast DPP Action frame was not ACKed");
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if (auth->waiting_auth_resp) {
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/* In case of DPP Authentication Request frame, move to
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* the next channel immediately. */
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hostapd_drv_send_action_cancel_wait(hapd);
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hostapd_dpp_auth_init_next(hapd);
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return;
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}
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if (auth->waiting_auth_conf) {
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hostapd_dpp_auth_resp_retry(hapd);
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return;
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}
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}
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if (!is_broadcast_ether_addr(dst) && auth->waiting_auth_resp && ok) {
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/* Allow timeout handling to stop iteration if no response is
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* received from a peer that has ACKed a request. */
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auth->auth_req_ack = 1;
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}
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if (!hapd->dpp_auth_ok_on_ack && hapd->dpp_auth->neg_freq > 0 &&
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hapd->dpp_auth->curr_freq != hapd->dpp_auth->neg_freq) {
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wpa_printf(MSG_DEBUG,
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"DPP: Move from curr_freq %u MHz to neg_freq %u MHz for response",
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hapd->dpp_auth->curr_freq,
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hapd->dpp_auth->neg_freq);
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hostapd_drv_send_action_cancel_wait(hapd);
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if (hapd->dpp_auth->neg_freq !=
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hapd->iface->freq && hapd->iface->freq > 0) {
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/* TODO: Listen operation on non-operating channel */
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wpa_printf(MSG_INFO,
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"DPP: Listen operation on non-operating channel (%d MHz) is not yet supported (operating channel: %d MHz)",
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hapd->dpp_auth->neg_freq, hapd->iface->freq);
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}
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}
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if (hapd->dpp_auth_ok_on_ack)
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hapd->dpp_auth_ok_on_ack = 0;
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}
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static void hostapd_dpp_reply_wait_timeout(void *eloop_ctx, void *timeout_ctx)
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{
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struct hostapd_data *hapd = eloop_ctx;
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struct dpp_authentication *auth = hapd->dpp_auth;
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unsigned int freq;
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struct os_reltime now, diff;
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unsigned int wait_time, diff_ms;
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if (!auth || !auth->waiting_auth_resp)
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return;
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wait_time = hapd->dpp_resp_wait_time ?
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hapd->dpp_resp_wait_time : 2000;
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os_get_reltime(&now);
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os_reltime_sub(&now, &hapd->dpp_last_init, &diff);
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diff_ms = diff.sec * 1000 + diff.usec / 1000;
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wpa_printf(MSG_DEBUG,
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"DPP: Reply wait timeout - wait_time=%u diff_ms=%u",
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wait_time, diff_ms);
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if (auth->auth_req_ack && diff_ms >= wait_time) {
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/* Peer ACK'ed Authentication Request frame, but did not reply
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* with Authentication Response frame within two seconds. */
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wpa_printf(MSG_INFO,
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"DPP: No response received from responder - stopping initiation attempt");
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wpa_msg(hapd->msg_ctx, MSG_INFO, DPP_EVENT_AUTH_INIT_FAILED);
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hostapd_drv_send_action_cancel_wait(hapd);
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hostapd_dpp_listen_stop(hapd);
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dpp_auth_deinit(auth);
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hapd->dpp_auth = NULL;
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return;
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}
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if (diff_ms >= wait_time) {
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/* Authentication Request frame was not ACK'ed and no reply
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* was receiving within two seconds. */
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wpa_printf(MSG_DEBUG,
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"DPP: Continue Initiator channel iteration");
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hostapd_drv_send_action_cancel_wait(hapd);
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hostapd_dpp_listen_stop(hapd);
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hostapd_dpp_auth_init_next(hapd);
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return;
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}
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/* Driver did not support 2000 ms long wait_time with TX command, so
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* schedule listen operation to continue waiting for the response.
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*
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* DPP listen operations continue until stopped, so simply schedule a
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* new call to this function at the point when the two second reply
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* wait has expired. */
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wait_time -= diff_ms;
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freq = auth->curr_freq;
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if (auth->neg_freq > 0)
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freq = auth->neg_freq;
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wpa_printf(MSG_DEBUG,
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"DPP: Continue reply wait on channel %u MHz for %u ms",
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freq, wait_time);
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hapd->dpp_in_response_listen = 1;
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if (freq != hapd->iface->freq && hapd->iface->freq > 0) {
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/* TODO: Listen operation on non-operating channel */
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wpa_printf(MSG_INFO,
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"DPP: Listen operation on non-operating channel (%d MHz) is not yet supported (operating channel: %d MHz)",
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freq, hapd->iface->freq);
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}
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eloop_register_timeout(wait_time / 1000, (wait_time % 1000) * 1000,
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hostapd_dpp_reply_wait_timeout, hapd, NULL);
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}
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@ -468,14 +648,110 @@ fail:
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}
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static void hostapd_dpp_init_timeout(void *eloop_ctx, void *timeout_ctx)
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{
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struct hostapd_data *hapd = eloop_ctx;
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if (!hapd->dpp_auth)
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return;
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wpa_printf(MSG_DEBUG, "DPP: Retry initiation after timeout");
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hostapd_dpp_auth_init_next(hapd);
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}
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static int hostapd_dpp_auth_init_next(struct hostapd_data *hapd)
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{
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struct dpp_authentication *auth = hapd->dpp_auth;
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const u8 *dst;
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unsigned int wait_time, max_wait_time, freq, max_tries, used;
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struct os_reltime now, diff;
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if (!auth)
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return -1;
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if (auth->freq_idx == 0)
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os_get_reltime(&hapd->dpp_init_iter_start);
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if (auth->freq_idx >= auth->num_freq) {
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auth->num_freq_iters++;
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if (hapd->dpp_init_max_tries)
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max_tries = hapd->dpp_init_max_tries;
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else
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max_tries = 5;
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if (auth->num_freq_iters >= max_tries || auth->auth_req_ack) {
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wpa_printf(MSG_INFO,
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"DPP: No response received from responder - stopping initiation attempt");
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wpa_msg(hapd->msg_ctx, MSG_INFO,
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DPP_EVENT_AUTH_INIT_FAILED);
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eloop_cancel_timeout(hostapd_dpp_reply_wait_timeout,
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hapd, NULL);
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hostapd_drv_send_action_cancel_wait(hapd);
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dpp_auth_deinit(hapd->dpp_auth);
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hapd->dpp_auth = NULL;
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return -1;
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}
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auth->freq_idx = 0;
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eloop_cancel_timeout(hostapd_dpp_init_timeout, hapd, NULL);
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if (hapd->dpp_init_retry_time)
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wait_time = hapd->dpp_init_retry_time;
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else
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wait_time = 10000;
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os_get_reltime(&now);
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os_reltime_sub(&now, &hapd->dpp_init_iter_start, &diff);
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used = diff.sec * 1000 + diff.usec / 1000;
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if (used > wait_time)
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wait_time = 0;
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else
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wait_time -= used;
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wpa_printf(MSG_DEBUG, "DPP: Next init attempt in %u ms",
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wait_time);
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eloop_register_timeout(wait_time / 1000,
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(wait_time % 1000) * 1000,
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hostapd_dpp_init_timeout, hapd,
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NULL);
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return 0;
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}
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freq = auth->freq[auth->freq_idx++];
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auth->curr_freq = freq;
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if (is_zero_ether_addr(auth->peer_bi->mac_addr))
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dst = broadcast;
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else
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dst = auth->peer_bi->mac_addr;
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hapd->dpp_auth_ok_on_ack = 0;
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eloop_cancel_timeout(hostapd_dpp_reply_wait_timeout, hapd, NULL);
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wait_time = 2000; /* TODO: hapd->max_remain_on_chan; */
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max_wait_time = hapd->dpp_resp_wait_time ?
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hapd->dpp_resp_wait_time : 2000;
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if (wait_time > max_wait_time)
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wait_time = max_wait_time;
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wait_time += 10; /* give the driver some extra time to complete */
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eloop_register_timeout(wait_time / 1000, (wait_time % 1000) * 1000,
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hostapd_dpp_reply_wait_timeout, hapd, NULL);
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wait_time -= 10;
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if (auth->neg_freq > 0 && freq != auth->neg_freq) {
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wpa_printf(MSG_DEBUG,
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"DPP: Initiate on %u MHz and move to neg_freq %u MHz for response",
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freq, auth->neg_freq);
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}
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wpa_msg(hapd->msg_ctx, MSG_INFO, DPP_EVENT_TX "dst=" MACSTR
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" freq=%u type=%d",
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MAC2STR(dst), freq, DPP_PA_AUTHENTICATION_REQ);
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auth->auth_req_ack = 0;
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os_get_reltime(&hapd->dpp_last_init);
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return hostapd_drv_send_action(hapd, freq, wait_time,
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dst,
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wpabuf_head(hapd->dpp_auth->req_msg),
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wpabuf_len(hapd->dpp_auth->req_msg));
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}
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int hostapd_dpp_auth_init(struct hostapd_data *hapd, const char *cmd)
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{
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const char *pos;
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struct dpp_bootstrap_info *peer_bi, *own_bi = NULL;
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const u8 *dst;
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int res;
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u8 allowed_roles = DPP_CAPAB_CONFIGURATOR;
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struct dpp_configuration *conf_sta = NULL, *conf_ap = NULL;
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unsigned int neg_freq = 0;
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pos = os_strstr(cmd, " peer=");
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if (!pos)
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@ -520,41 +796,37 @@ int hostapd_dpp_auth_init(struct hostapd_data *hapd, const char *cmd)
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goto fail;
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}
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if (hapd->dpp_auth)
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pos = os_strstr(cmd, " neg_freq=");
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if (pos)
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neg_freq = atoi(pos + 10);
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if (hapd->dpp_auth) {
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eloop_cancel_timeout(hostapd_dpp_init_timeout, hapd, NULL);
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eloop_cancel_timeout(hostapd_dpp_reply_wait_timeout,
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hapd, NULL);
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eloop_cancel_timeout(hostapd_dpp_auth_resp_retry_timeout, hapd,
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NULL);
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hostapd_drv_send_action_cancel_wait(hapd);
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dpp_auth_deinit(hapd->dpp_auth);
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/* TODO: hw_modes */
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}
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hapd->dpp_auth = dpp_auth_init(hapd->msg_ctx, peer_bi, own_bi,
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allowed_roles, 0, NULL, 0);
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allowed_roles, neg_freq,
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hapd->iface->hw_features,
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hapd->iface->num_hw_features);
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if (!hapd->dpp_auth)
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goto fail;
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hostapd_dpp_set_testing_options(hapd, hapd->dpp_auth);
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hostapd_dpp_set_configurator(hapd, hapd->dpp_auth, cmd);
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/* TODO: Support iteration over all frequencies and filtering of
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* frequencies based on locally enabled channels that allow initiation
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* of transmission. */
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hapd->dpp_auth->neg_freq = neg_freq;
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if (is_zero_ether_addr(peer_bi->mac_addr)) {
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dst = broadcast;
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} else {
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dst = peer_bi->mac_addr;
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if (!is_zero_ether_addr(peer_bi->mac_addr))
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os_memcpy(hapd->dpp_auth->peer_mac_addr, peer_bi->mac_addr,
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ETH_ALEN);
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}
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hapd->dpp_auth_ok_on_ack = 0;
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wpa_msg(hapd->msg_ctx, MSG_INFO, DPP_EVENT_TX "dst=" MACSTR
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" freq=%u type=%d",
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MAC2STR(dst), hapd->dpp_auth->curr_freq,
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DPP_PA_AUTHENTICATION_REQ);
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res = hostapd_drv_send_action(hapd, hapd->dpp_auth->curr_freq, 0,
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dst, wpabuf_head(hapd->dpp_auth->req_msg),
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wpabuf_len(hapd->dpp_auth->req_msg));
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return res;
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return hostapd_dpp_auth_init_next(hapd);
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fail:
|
||||
dpp_configuration_free(conf_sta);
|
||||
dpp_configuration_free(conf_ap);
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
|
@ -880,7 +1152,8 @@ static void hostapd_dpp_auth_success(struct hostapd_data *hapd, int initiator)
|
|||
|
||||
|
||||
static void hostapd_dpp_rx_auth_resp(struct hostapd_data *hapd, const u8 *src,
|
||||
const u8 *hdr, const u8 *buf, size_t len)
|
||||
const u8 *hdr, const u8 *buf, size_t len,
|
||||
unsigned int freq)
|
||||
{
|
||||
struct dpp_authentication *auth = hapd->dpp_auth;
|
||||
struct wpabuf *msg;
|
||||
|
|
@ -901,6 +1174,15 @@ static void hostapd_dpp_rx_auth_resp(struct hostapd_data *hapd, const u8 *src,
|
|||
return;
|
||||
}
|
||||
|
||||
eloop_cancel_timeout(hostapd_dpp_reply_wait_timeout, hapd, NULL);
|
||||
|
||||
if (auth->curr_freq != freq && auth->neg_freq == freq) {
|
||||
wpa_printf(MSG_DEBUG,
|
||||
"DPP: Responder accepted request for different negotiation channel");
|
||||
auth->curr_freq = freq;
|
||||
}
|
||||
|
||||
eloop_cancel_timeout(hostapd_dpp_init_timeout, hapd, NULL);
|
||||
msg = dpp_auth_resp_rx(auth, hdr, buf, len);
|
||||
if (!msg) {
|
||||
if (auth->auth_resp_status == DPP_STATUS_RESPONSE_PENDING) {
|
||||
|
|
@ -1392,7 +1674,7 @@ void hostapd_dpp_rx_action(struct hostapd_data *hapd, const u8 *src,
|
|||
hostapd_dpp_rx_auth_req(hapd, src, hdr, buf, len, freq);
|
||||
break;
|
||||
case DPP_PA_AUTHENTICATION_RESP:
|
||||
hostapd_dpp_rx_auth_resp(hapd, src, hdr, buf, len);
|
||||
hostapd_dpp_rx_auth_resp(hapd, src, hdr, buf, len, freq);
|
||||
break;
|
||||
case DPP_PA_AUTHENTICATION_CONF:
|
||||
hostapd_dpp_rx_auth_conf(hapd, src, hdr, buf, len);
|
||||
|
|
@ -1461,6 +1743,10 @@ void hostapd_dpp_gas_status_handler(struct hostapd_data *hapd, int ok)
|
|||
if (!hapd->dpp_auth)
|
||||
return;
|
||||
|
||||
eloop_cancel_timeout(hostapd_dpp_reply_wait_timeout, hapd, NULL);
|
||||
eloop_cancel_timeout(hostapd_dpp_auth_resp_retry_timeout, hapd, NULL);
|
||||
hostapd_drv_send_action_cancel_wait(hapd);
|
||||
|
||||
if (ok)
|
||||
wpa_msg(hapd->msg_ctx, MSG_INFO, DPP_EVENT_CONF_SENT);
|
||||
else
|
||||
|
|
@ -1718,6 +2004,9 @@ void hostapd_dpp_deinit(struct hostapd_data *hapd)
|
|||
#endif /* CONFIG_TESTING_OPTIONS */
|
||||
if (!hapd->dpp_init_done)
|
||||
return;
|
||||
eloop_cancel_timeout(hostapd_dpp_reply_wait_timeout, hapd, NULL);
|
||||
eloop_cancel_timeout(hostapd_dpp_init_timeout, hapd, NULL);
|
||||
eloop_cancel_timeout(hostapd_dpp_auth_resp_retry_timeout, hapd, NULL);
|
||||
dpp_auth_deinit(hapd->dpp_auth);
|
||||
hapd->dpp_auth = NULL;
|
||||
hostapd_dpp_pkex_remove(hapd, "*");
|
||||
|
|
|
|||
|
|
@ -347,6 +347,7 @@ struct hostapd_data {
|
|||
u8 dpp_allowed_roles;
|
||||
int dpp_qr_mutual;
|
||||
int dpp_auth_ok_on_ack;
|
||||
int dpp_in_response_listen;
|
||||
struct gas_query_ap *gas;
|
||||
struct dpp_pkex *dpp_pkex;
|
||||
struct dpp_bootstrap_info *dpp_pkex_bi;
|
||||
|
|
@ -354,6 +355,13 @@ struct hostapd_data {
|
|||
char *dpp_pkex_identifier;
|
||||
char *dpp_pkex_auth_cmd;
|
||||
char *dpp_configurator_params;
|
||||
struct os_reltime dpp_last_init;
|
||||
struct os_reltime dpp_init_iter_start;
|
||||
unsigned int dpp_init_max_tries;
|
||||
unsigned int dpp_init_retry_time;
|
||||
unsigned int dpp_resp_wait_time;
|
||||
unsigned int dpp_resp_max_tries;
|
||||
unsigned int dpp_resp_retry_time;
|
||||
#ifdef CONFIG_TESTING_OPTIONS
|
||||
char *dpp_config_obj_override;
|
||||
char *dpp_discovery_override;
|
||||
|
|
|
|||
Loading…
Reference in a new issue