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* WPA Supplicant - Glue code to setup EAPOL and RSN modules
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* Copyright (c) 2003-2007, Jouni Malinen <j@w1.fi>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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* Alternatively, this software may be distributed under the terms of BSD
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* See README and COPYING for more details.
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#include "eapol_supp/eapol_supp_sm.h"
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#include "l2_packet/l2_packet.h"
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#include "wpa_common.h"
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#include "wpa_supplicant_i.h"
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#include "pmksa_cache.h"
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#include "ieee802_11_defs.h"
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#include "wpas_glue.h"
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#ifndef CONFIG_NO_CONFIG_BLOBS
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#if defined(IEEE8021X_EAPOL) || !defined(CONFIG_NO_WPA)
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static void wpa_supplicant_set_config_blob(void *ctx,
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struct wpa_config_blob *blob)
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struct wpa_supplicant *wpa_s = ctx;
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wpa_config_set_blob(wpa_s->conf, blob);
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static const struct wpa_config_blob *
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wpa_supplicant_get_config_blob(void *ctx, const char *name)
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struct wpa_supplicant *wpa_s = ctx;
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return wpa_config_get_blob(wpa_s->conf, name);
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#endif /* defined(IEEE8021X_EAPOL) || !defined(CONFIG_NO_WPA) */
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#endif /* CONFIG_NO_CONFIG_BLOBS */
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#if defined(IEEE8021X_EAPOL) || !defined(CONFIG_NO_WPA)
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static u8 * wpa_alloc_eapol(const struct wpa_supplicant *wpa_s, u8 type,
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const void *data, u16 data_len,
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size_t *msg_len, void **data_pos)
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struct ieee802_1x_hdr *hdr;
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*msg_len = sizeof(*hdr) + data_len;
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hdr = os_malloc(*msg_len);
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hdr->version = wpa_s->conf->eapol_version;
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hdr->length = host_to_be16(data_len);
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os_memcpy(hdr + 1, data, data_len);
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os_memset(hdr + 1, 0, data_len);
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* wpa_ether_send - Send Ethernet frame
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* @wpa_s: Pointer to wpa_supplicant data
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* @dest: Destination MAC address
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* @proto: Ethertype in host byte order
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* @buf: Frame payload starting from IEEE 802.1X header
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* @len: Frame payload length
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* Returns: >=0 on success, <0 on failure
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static int wpa_ether_send(struct wpa_supplicant *wpa_s, const u8 *dest,
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u16 proto, const u8 *buf, size_t len)
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return l2_packet_send(wpa_s->l2, dest, proto, buf, len);
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return wpa_drv_send_eapol(wpa_s, dest, proto, buf, len);
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#endif /* IEEE8021X_EAPOL || !CONFIG_NO_WPA */
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#ifdef IEEE8021X_EAPOL
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* wpa_supplicant_eapol_send - Send IEEE 802.1X EAPOL packet to Authenticator
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* @ctx: Pointer to wpa_supplicant data (wpa_s)
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* @type: IEEE 802.1X packet type (IEEE802_1X_TYPE_*)
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* @buf: EAPOL payload (after IEEE 802.1X header)
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* @len: EAPOL payload length
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* Returns: >=0 on success, <0 on failure
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* This function adds Ethernet and IEEE 802.1X header and sends the EAPOL frame
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* to the current Authenticator.
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static int wpa_supplicant_eapol_send(void *ctx, int type, const u8 *buf,
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struct wpa_supplicant *wpa_s = ctx;
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u8 *msg, *dst, bssid[ETH_ALEN];
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/* TODO: could add l2_packet_sendmsg that allows fragments to avoid
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if (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK ||
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wpa_s->key_mgmt == WPA_KEY_MGMT_FT_PSK ||
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wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) {
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/* Current SSID is not using IEEE 802.1X/EAP, so drop possible
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* EAPOL frames (mainly, EAPOL-Start) from EAPOL state
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wpa_printf(MSG_DEBUG, "WPA: drop TX EAPOL in non-IEEE 802.1X "
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"mode (type=%d len=%lu)", type,
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(unsigned long) len);
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if (pmksa_cache_get_current(wpa_s->wpa) &&
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type == IEEE802_1X_TYPE_EAPOL_START) {
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/* Trying to use PMKSA caching - do not send EAPOL-Start frames
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* since they will trigger full EAPOL authentication. */
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wpa_printf(MSG_DEBUG, "RSN: PMKSA caching - do not send "
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if (os_memcmp(wpa_s->bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0)
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wpa_printf(MSG_DEBUG, "BSSID not set when trying to send an "
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if (wpa_drv_get_bssid(wpa_s, bssid) == 0 &&
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os_memcmp(bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) !=
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wpa_printf(MSG_DEBUG, "Using current BSSID " MACSTR
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" from the driver as the EAPOL destination",
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dst = wpa_s->last_eapol_src;
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wpa_printf(MSG_DEBUG, "Using the source address of the"
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" last received EAPOL frame " MACSTR " as "
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"the EAPOL destination",
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/* BSSID was already set (from (Re)Assoc event, so use it as
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* the EAPOL destination. */
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msg = wpa_alloc_eapol(wpa_s, type, buf, len, &msglen, NULL);
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wpa_printf(MSG_DEBUG, "TX EAPOL: dst=" MACSTR, MAC2STR(dst));
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wpa_hexdump(MSG_MSGDUMP, "TX EAPOL", msg, msglen);
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res = wpa_ether_send(wpa_s, dst, ETH_P_EAPOL, msg, msglen);
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* wpa_eapol_set_wep_key - set WEP key for the driver
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* @ctx: Pointer to wpa_supplicant data (wpa_s)
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* @unicast: 1 = individual unicast key, 0 = broadcast key
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* @keyidx: WEP key index (0..3)
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* @key: Pointer to key data
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* @keylen: Key length in bytes
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* Returns: 0 on success or < 0 on error.
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static int wpa_eapol_set_wep_key(void *ctx, int unicast, int keyidx,
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const u8 *key, size_t keylen)
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struct wpa_supplicant *wpa_s = ctx;
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if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
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int cipher = (keylen == 5) ? WPA_CIPHER_WEP40 :
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wpa_s->pairwise_cipher = cipher;
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wpa_s->group_cipher = cipher;
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return wpa_drv_set_key(wpa_s, WPA_ALG_WEP,
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unicast ? wpa_s->bssid :
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(u8 *) "\xff\xff\xff\xff\xff\xff",
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keyidx, unicast, (u8 *) "", 0, key, keylen);
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static void wpa_supplicant_aborted_cached(void *ctx)
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struct wpa_supplicant *wpa_s = ctx;
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wpa_sm_aborted_cached(wpa_s->wpa);
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static void wpa_supplicant_eapol_cb(struct eapol_sm *eapol, int success,
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struct wpa_supplicant *wpa_s = ctx;
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wpa_printf(MSG_DEBUG, "EAPOL authentication completed %ssuccessfully",
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success ? "" : "un");
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if (!success || !wpa_s->driver_4way_handshake)
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if (wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X &&
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wpa_s->key_mgmt != WPA_KEY_MGMT_FT_IEEE8021X)
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wpa_printf(MSG_DEBUG, "Configure PMK for driver-based RSN 4-way "
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res = eapol_sm_get_key(eapol, pmk, PMK_LEN);
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* EAP-LEAP is an exception from other EAP methods: it
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* uses only 16-byte PMK.
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res = eapol_sm_get_key(eapol, pmk, 16);
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wpa_printf(MSG_DEBUG, "Failed to get PMK from EAPOL state "
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if (wpa_drv_set_key(wpa_s, WPA_ALG_PMK, NULL, 0, 0, NULL, 0, pmk,
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wpa_printf(MSG_DEBUG, "Failed to set PMK to the driver");
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wpa_supplicant_cancel_scan(wpa_s);
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wpa_supplicant_cancel_auth_timeout(wpa_s);
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wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
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static void wpa_supplicant_notify_eapol_done(void *ctx)
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struct wpa_supplicant *wpa_s = ctx;
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wpa_msg(wpa_s, MSG_DEBUG, "WPA: EAPOL processing complete");
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if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X ||
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wpa_s->key_mgmt == WPA_KEY_MGMT_FT_IEEE8021X) {
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wpa_supplicant_set_state(wpa_s, WPA_4WAY_HANDSHAKE);
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wpa_supplicant_cancel_scan(wpa_s);
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wpa_supplicant_cancel_auth_timeout(wpa_s);
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wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
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#endif /* IEEE8021X_EAPOL */
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#ifndef CONFIG_NO_WPA
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static int wpa_get_beacon_ie(struct wpa_supplicant *wpa_s)
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struct wpa_scan_res *curr = NULL;
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struct wpa_ssid *ssid = wpa_s->current_ssid;
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if (wpa_s->scan_res == NULL)
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for (i = 0; i < wpa_s->scan_res->num; i++) {
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struct wpa_scan_res *r = wpa_s->scan_res->res[i];
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if (os_memcmp(r->bssid, wpa_s->bssid, ETH_ALEN) != 0)
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ie = wpa_scan_get_ie(r, WLAN_EID_SSID);
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((ie && ie[1] == ssid->ssid_len &&
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os_memcmp(ie + 2, ssid->ssid, ssid->ssid_len) == 0) ||
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ssid->ssid_len == 0)) {
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ie = wpa_scan_get_vendor_ie(curr, WPA_IE_VENDOR_TYPE);
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if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0))
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ie = wpa_scan_get_ie(curr, WLAN_EID_RSN);
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if (wpa_sm_set_ap_rsn_ie(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0))
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static int wpa_supplicant_get_beacon_ie(void *ctx)
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struct wpa_supplicant *wpa_s = ctx;
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if (wpa_get_beacon_ie(wpa_s) == 0) {
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/* No WPA/RSN IE found in the cached scan results. Try to get updated
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* scan results from the driver. */
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if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
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return wpa_get_beacon_ie(wpa_s);
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static u8 * _wpa_alloc_eapol(void *wpa_s, u8 type,
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const void *data, u16 data_len,
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size_t *msg_len, void **data_pos)
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return wpa_alloc_eapol(wpa_s, type, data, data_len, msg_len, data_pos);
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static int _wpa_ether_send(void *wpa_s, const u8 *dest, u16 proto,
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const u8 *buf, size_t len)
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return wpa_ether_send(wpa_s, dest, proto, buf, len);
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static void _wpa_supplicant_req_scan(void *wpa_s, int sec, int usec)
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wpa_supplicant_req_scan(wpa_s, sec, usec);
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static void _wpa_supplicant_cancel_scan(void *wpa_s)
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wpa_supplicant_cancel_scan(wpa_s);
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static void _wpa_supplicant_cancel_auth_timeout(void *wpa_s)
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wpa_supplicant_cancel_auth_timeout(wpa_s);
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static void _wpa_supplicant_set_state(void *wpa_s, wpa_states state)
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wpa_supplicant_set_state(wpa_s, state);
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* wpa_supplicant_get_state - Get the connection state
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* @wpa_s: Pointer to wpa_supplicant data
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* Returns: The current connection state (WPA_*)
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static wpa_states wpa_supplicant_get_state(struct wpa_supplicant *wpa_s)
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return wpa_s->wpa_state;
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static wpa_states _wpa_supplicant_get_state(void *wpa_s)
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return wpa_supplicant_get_state(wpa_s);
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static void _wpa_supplicant_disassociate(void *wpa_s, int reason_code)
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wpa_supplicant_disassociate(wpa_s, reason_code);
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static void _wpa_supplicant_deauthenticate(void *wpa_s, int reason_code)
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wpa_supplicant_deauthenticate(wpa_s, reason_code);
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static void * wpa_supplicant_get_network_ctx(void *wpa_s)
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return wpa_supplicant_get_ssid(wpa_s);
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static int wpa_supplicant_get_bssid(void *ctx, u8 *bssid)
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struct wpa_supplicant *wpa_s = ctx;
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if (wpa_s->use_client_mlme) {
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os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
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return wpa_drv_get_bssid(wpa_s, bssid);
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static int wpa_supplicant_set_key(void *wpa_s, wpa_alg alg,
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const u8 *addr, int key_idx, int set_tx,
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const u8 *seq, size_t seq_len,
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const u8 *key, size_t key_len)
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return wpa_drv_set_key(wpa_s, alg, addr, key_idx, set_tx, seq, seq_len,
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static int wpa_supplicant_mlme_setprotection(void *wpa_s, const u8 *addr,
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return wpa_drv_mlme_setprotection(wpa_s, addr, protection_type,
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static int wpa_supplicant_add_pmkid(void *wpa_s,
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const u8 *bssid, const u8 *pmkid)
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return wpa_drv_add_pmkid(wpa_s, bssid, pmkid);
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static int wpa_supplicant_remove_pmkid(void *wpa_s,
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const u8 *bssid, const u8 *pmkid)
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return wpa_drv_remove_pmkid(wpa_s, bssid, pmkid);
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#ifdef CONFIG_IEEE80211R
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static int wpa_supplicant_update_ft_ies(void *ctx, const u8 *md,
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const u8 *ies, size_t ies_len)
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struct wpa_supplicant *wpa_s = ctx;
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if (wpa_s->use_client_mlme)
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return ieee80211_sta_update_ft_ies(wpa_s, md, ies, ies_len);
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return wpa_drv_update_ft_ies(wpa_s, md, ies, ies_len);
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static int wpa_supplicant_send_ft_action(void *ctx, u8 action,
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const u8 *ies, size_t ies_len)
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struct wpa_supplicant *wpa_s = ctx;
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if (wpa_s->use_client_mlme)
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return ieee80211_sta_send_ft_action(wpa_s, action, target_ap,
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return wpa_drv_send_ft_action(wpa_s, action, target_ap, ies, ies_len);
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#endif /* CONFIG_IEEE80211R */
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#endif /* CONFIG_NO_WPA */
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#if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG)
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static void wpa_supplicant_eap_param_needed(void *ctx, const char *field,
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struct wpa_supplicant *wpa_s = ctx;
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struct wpa_ssid *ssid = wpa_s->current_ssid;
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buflen = 100 + os_strlen(txt) + ssid->ssid_len;
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buf = os_malloc(buflen);
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len = os_snprintf(buf, buflen,
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WPA_CTRL_REQ "%s-%d:%s needed for SSID ",
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field, ssid->id, txt);
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if (len < 0 || (size_t) len >= buflen) {
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if (ssid->ssid && buflen > len + ssid->ssid_len) {
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os_memcpy(buf + len, ssid->ssid, ssid->ssid_len);
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len += ssid->ssid_len;
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buf[buflen - 1] = '\0';
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wpa_msg(wpa_s, MSG_INFO, "%s", buf);
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#else /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
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#define wpa_supplicant_eap_param_needed NULL
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#endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
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int wpa_supplicant_init_eapol(struct wpa_supplicant *wpa_s)
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#ifdef IEEE8021X_EAPOL
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struct eapol_ctx *ctx;
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ctx = os_zalloc(sizeof(*ctx));
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wpa_printf(MSG_ERROR, "Failed to allocate EAPOL context.");
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ctx->msg_ctx = wpa_s;
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ctx->eapol_send_ctx = wpa_s;
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ctx->eapol_done_cb = wpa_supplicant_notify_eapol_done;
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ctx->eapol_send = wpa_supplicant_eapol_send;
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ctx->set_wep_key = wpa_eapol_set_wep_key;
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ctx->set_config_blob = wpa_supplicant_set_config_blob;
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ctx->get_config_blob = wpa_supplicant_get_config_blob;
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ctx->aborted_cached = wpa_supplicant_aborted_cached;
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#ifdef EAP_TLS_OPENSSL
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ctx->opensc_engine_path = wpa_s->conf->opensc_engine_path;
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ctx->pkcs11_engine_path = wpa_s->conf->pkcs11_engine_path;
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ctx->pkcs11_module_path = wpa_s->conf->pkcs11_module_path;
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#endif /* EAP_TLS_OPENSSL */
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ctx->eap_param_needed = wpa_supplicant_eap_param_needed;
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ctx->cb = wpa_supplicant_eapol_cb;
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wpa_s->eapol = eapol_sm_init(ctx);
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if (wpa_s->eapol == NULL) {
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wpa_printf(MSG_ERROR, "Failed to initialize EAPOL state "
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#endif /* IEEE8021X_EAPOL */
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int wpa_supplicant_init_wpa(struct wpa_supplicant *wpa_s)
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#ifndef CONFIG_NO_WPA
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struct wpa_sm_ctx *ctx;
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ctx = os_zalloc(sizeof(*ctx));
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wpa_printf(MSG_ERROR, "Failed to allocate WPA context.");
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ctx->set_state = _wpa_supplicant_set_state;
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ctx->get_state = _wpa_supplicant_get_state;
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ctx->req_scan = _wpa_supplicant_req_scan;
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ctx->cancel_scan = _wpa_supplicant_cancel_scan;
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ctx->deauthenticate = _wpa_supplicant_deauthenticate;
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ctx->disassociate = _wpa_supplicant_disassociate;
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ctx->set_key = wpa_supplicant_set_key;
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ctx->get_network_ctx = wpa_supplicant_get_network_ctx;
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ctx->get_bssid = wpa_supplicant_get_bssid;
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ctx->ether_send = _wpa_ether_send;
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ctx->get_beacon_ie = wpa_supplicant_get_beacon_ie;
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ctx->alloc_eapol = _wpa_alloc_eapol;
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ctx->cancel_auth_timeout = _wpa_supplicant_cancel_auth_timeout;
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ctx->add_pmkid = wpa_supplicant_add_pmkid;
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ctx->remove_pmkid = wpa_supplicant_remove_pmkid;
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#ifndef CONFIG_NO_CONFIG_BLOBS
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ctx->set_config_blob = wpa_supplicant_set_config_blob;
594
ctx->get_config_blob = wpa_supplicant_get_config_blob;
595
#endif /* CONFIG_NO_CONFIG_BLOBS */
596
ctx->mlme_setprotection = wpa_supplicant_mlme_setprotection;
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#ifdef CONFIG_IEEE80211R
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ctx->update_ft_ies = wpa_supplicant_update_ft_ies;
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ctx->send_ft_action = wpa_supplicant_send_ft_action;
600
#endif /* CONFIG_IEEE80211R */
602
wpa_s->wpa = wpa_sm_init(ctx);
603
if (wpa_s->wpa == NULL) {
604
wpa_printf(MSG_ERROR, "Failed to initialize WPA state "
608
#endif /* CONFIG_NO_WPA */
614
void wpa_supplicant_rsn_supp_set_config(struct wpa_supplicant *wpa_s,
615
struct wpa_ssid *ssid)
617
struct rsn_supp_config conf;
619
os_memset(&conf, 0, sizeof(conf));
620
conf.peerkey_enabled = ssid->peerkey;
621
conf.allowed_pairwise_cipher = ssid->pairwise_cipher;
622
conf.eap_workaround = ssid->eap_workaround;
623
conf.eap_conf_ctx = &ssid->eap;
624
conf.ssid = ssid->ssid;
625
conf.ssid_len = ssid->ssid_len;
627
wpa_sm_set_config(wpa_s->wpa, ssid ? &conf : NULL);