wpa_supplicant: Initial Revision 0.8.X
Based on:
commit 0725cc7b7efc434910e89865c42eda7ce61bbf08
Author: Jouni Malinen <j@w1.fi>
Date: Thu Apr 21 20:41:01 2011 +0300
Enable CONFIG_DRIVER_NL80211=y in the default configuration
nl80211 should be preferred over WEXT with any recent Linux
kernel version.
Change-Id: I26aec5afbbd4f4a1f5fd900912545b6f5050de64
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/src/ap/drv_callbacks.c b/src/ap/drv_callbacks.c
new file mode 100644
index 0000000..02b7ecf
--- /dev/null
+++ b/src/ap/drv_callbacks.c
@@ -0,0 +1,539 @@
+/*
+ * hostapd / Callback functions for driver wrappers
+ * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include "utils/includes.h"
+
+#include "utils/common.h"
+#include "radius/radius.h"
+#include "drivers/driver.h"
+#include "common/ieee802_11_defs.h"
+#include "common/ieee802_11_common.h"
+#include "common/wpa_ctrl.h"
+#include "crypto/random.h"
+#include "p2p/p2p.h"
+#include "wps/wps.h"
+#include "hostapd.h"
+#include "ieee802_11.h"
+#include "sta_info.h"
+#include "accounting.h"
+#include "tkip_countermeasures.h"
+#include "iapp.h"
+#include "ieee802_1x.h"
+#include "wpa_auth.h"
+#include "wmm.h"
+#include "wps_hostapd.h"
+#include "ap_drv_ops.h"
+#include "ap_config.h"
+
+
+int hostapd_notif_assoc(struct hostapd_data *hapd, const u8 *addr,
+ const u8 *ie, size_t ielen, int reassoc)
+{
+ struct sta_info *sta;
+ int new_assoc, res;
+ struct ieee802_11_elems elems;
+#ifdef CONFIG_P2P
+ const u8 *all_ies = ie;
+ size_t all_ies_len = ielen;
+#endif /* CONFIG_P2P */
+
+ if (addr == NULL) {
+ /*
+ * This could potentially happen with unexpected event from the
+ * driver wrapper. This was seen at least in one case where the
+ * driver ended up being set to station mode while hostapd was
+ * running, so better make sure we stop processing such an
+ * event here.
+ */
+ wpa_printf(MSG_DEBUG, "hostapd_notif_assoc: Skip event with "
+ "no address");
+ return -1;
+ }
+ random_add_randomness(addr, ETH_ALEN);
+
+ hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
+ HOSTAPD_LEVEL_INFO, "associated");
+
+ ieee802_11_parse_elems(ie, ielen, &elems, 0);
+ if (elems.wps_ie) {
+ ie = elems.wps_ie - 2;
+ ielen = elems.wps_ie_len + 2;
+ wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)AssocReq");
+ } else if (elems.rsn_ie) {
+ ie = elems.rsn_ie - 2;
+ ielen = elems.rsn_ie_len + 2;
+ wpa_printf(MSG_DEBUG, "STA included RSN IE in (Re)AssocReq");
+ } else if (elems.wpa_ie) {
+ ie = elems.wpa_ie - 2;
+ ielen = elems.wpa_ie_len + 2;
+ wpa_printf(MSG_DEBUG, "STA included WPA IE in (Re)AssocReq");
+ } else {
+ ie = NULL;
+ ielen = 0;
+ wpa_printf(MSG_DEBUG, "STA did not include WPS/RSN/WPA IE in "
+ "(Re)AssocReq");
+ }
+
+ sta = ap_get_sta(hapd, addr);
+ if (sta) {
+ accounting_sta_stop(hapd, sta);
+ } else {
+ sta = ap_sta_add(hapd, addr);
+ if (sta == NULL)
+ return -1;
+ }
+ sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS);
+
+#ifdef CONFIG_P2P
+ if (elems.p2p) {
+ wpabuf_free(sta->p2p_ie);
+ sta->p2p_ie = ieee802_11_vendor_ie_concat(all_ies, all_ies_len,
+ P2P_IE_VENDOR_TYPE);
+ }
+#endif /* CONFIG_P2P */
+
+ if (hapd->conf->wpa) {
+ if (ie == NULL || ielen == 0) {
+ if (hapd->conf->wps_state) {
+ wpa_printf(MSG_DEBUG, "STA did not include "
+ "WPA/RSN IE in (Re)Association "
+ "Request - possible WPS use");
+ sta->flags |= WLAN_STA_MAYBE_WPS;
+ goto skip_wpa_check;
+ }
+
+ wpa_printf(MSG_DEBUG, "No WPA/RSN IE from STA");
+ return -1;
+ }
+ if (hapd->conf->wps_state && ie[0] == 0xdd && ie[1] >= 4 &&
+ os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
+ sta->flags |= WLAN_STA_WPS;
+ goto skip_wpa_check;
+ }
+
+ if (sta->wpa_sm == NULL)
+ sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
+ sta->addr);
+ if (sta->wpa_sm == NULL) {
+ wpa_printf(MSG_ERROR, "Failed to initialize WPA state "
+ "machine");
+ return -1;
+ }
+ res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
+ ie, ielen, NULL, 0);
+ if (res != WPA_IE_OK) {
+ int resp;
+ wpa_printf(MSG_DEBUG, "WPA/RSN information element "
+ "rejected? (res %u)", res);
+ wpa_hexdump(MSG_DEBUG, "IE", ie, ielen);
+ if (res == WPA_INVALID_GROUP)
+ resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
+ else if (res == WPA_INVALID_PAIRWISE)
+ resp = WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID;
+ else if (res == WPA_INVALID_AKMP)
+ resp = WLAN_REASON_AKMP_NOT_VALID;
+#ifdef CONFIG_IEEE80211W
+ else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
+ resp = WLAN_REASON_INVALID_IE;
+ else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
+ resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
+#endif /* CONFIG_IEEE80211W */
+ else
+ resp = WLAN_REASON_INVALID_IE;
+ hostapd_drv_sta_disassoc(hapd, sta->addr, resp);
+ ap_free_sta(hapd, sta);
+ return -1;
+ }
+ } else if (hapd->conf->wps_state) {
+#ifdef CONFIG_WPS_STRICT
+ if (ie) {
+ struct wpabuf *wps;
+ wps = ieee802_11_vendor_ie_concat(ie, ielen,
+ WPS_IE_VENDOR_TYPE);
+ if (wps && wps_validate_assoc_req(wps) < 0) {
+ hostapd_drv_sta_disassoc(
+ hapd, sta->addr,
+ WLAN_REASON_INVALID_IE);
+ ap_free_sta(hapd, sta);
+ wpabuf_free(wps);
+ return -1;
+ }
+ wpabuf_free(wps);
+ }
+#endif /* CONFIG_WPS_STRICT */
+ if (ie && ielen > 4 && ie[0] == 0xdd && ie[1] >= 4 &&
+ os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
+ sta->flags |= WLAN_STA_WPS;
+ } else
+ sta->flags |= WLAN_STA_MAYBE_WPS;
+ }
+skip_wpa_check:
+
+ new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
+ sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
+ wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
+
+ hostapd_new_assoc_sta(hapd, sta, !new_assoc);
+
+ ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
+
+#ifdef CONFIG_P2P
+ p2p_group_notif_assoc(hapd->p2p_group, sta->addr,
+ all_ies, all_ies_len);
+#endif /* CONFIG_P2P */
+
+ return 0;
+}
+
+
+void hostapd_notif_disassoc(struct hostapd_data *hapd, const u8 *addr)
+{
+ struct sta_info *sta;
+
+ if (addr == NULL) {
+ /*
+ * This could potentially happen with unexpected event from the
+ * driver wrapper. This was seen at least in one case where the
+ * driver ended up reporting a station mode event while hostapd
+ * was running, so better make sure we stop processing such an
+ * event here.
+ */
+ wpa_printf(MSG_DEBUG, "hostapd_notif_disassoc: Skip event "
+ "with no address");
+ return;
+ }
+
+ hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
+ HOSTAPD_LEVEL_INFO, "disassociated");
+
+ sta = ap_get_sta(hapd, addr);
+ if (sta == NULL) {
+ wpa_printf(MSG_DEBUG, "Disassociation notification for "
+ "unknown STA " MACSTR, MAC2STR(addr));
+ return;
+ }
+
+ sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
+ wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED MACSTR,
+ MAC2STR(sta->addr));
+ wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
+ sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
+ ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
+ ap_free_sta(hapd, sta);
+}
+
+
+void hostapd_event_sta_low_ack(struct hostapd_data *hapd, const u8 *addr)
+{
+ struct sta_info *sta = ap_get_sta(hapd, addr);
+
+ if (!sta || !hapd->conf->disassoc_low_ack)
+ return;
+
+ hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
+ HOSTAPD_LEVEL_INFO, "disconnected due to excessive "
+ "missing ACKs");
+ hostapd_drv_sta_disassoc(hapd, addr, WLAN_REASON_DISASSOC_LOW_ACK);
+ if (sta)
+ ap_sta_disassociate(hapd, sta, WLAN_REASON_DISASSOC_LOW_ACK);
+}
+
+
+int hostapd_probe_req_rx(struct hostapd_data *hapd, const u8 *sa,
+ const u8 *ie, size_t ie_len)
+{
+ size_t i;
+ int ret = 0;
+
+ if (sa == NULL || ie == NULL)
+ return -1;
+
+ random_add_randomness(sa, ETH_ALEN);
+ for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++) {
+ if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
+ sa, ie, ie_len) > 0) {
+ ret = 1;
+ break;
+ }
+ }
+ return ret;
+}
+
+
+#ifdef HOSTAPD
+
+#ifdef NEED_AP_MLME
+
+static const u8 * get_hdr_bssid(const struct ieee80211_hdr *hdr, size_t len)
+{
+ u16 fc, type, stype;
+
+ /*
+ * PS-Poll frames are 16 bytes. All other frames are
+ * 24 bytes or longer.
+ */
+ if (len < 16)
+ return NULL;
+
+ fc = le_to_host16(hdr->frame_control);
+ type = WLAN_FC_GET_TYPE(fc);
+ stype = WLAN_FC_GET_STYPE(fc);
+
+ switch (type) {
+ case WLAN_FC_TYPE_DATA:
+ if (len < 24)
+ return NULL;
+ switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
+ case WLAN_FC_FROMDS | WLAN_FC_TODS:
+ case WLAN_FC_TODS:
+ return hdr->addr1;
+ case WLAN_FC_FROMDS:
+ return hdr->addr2;
+ default:
+ return NULL;
+ }
+ case WLAN_FC_TYPE_CTRL:
+ if (stype != WLAN_FC_STYPE_PSPOLL)
+ return NULL;
+ return hdr->addr1;
+ case WLAN_FC_TYPE_MGMT:
+ return hdr->addr3;
+ default:
+ return NULL;
+ }
+}
+
+
+#define HAPD_BROADCAST ((struct hostapd_data *) -1)
+
+static struct hostapd_data * get_hapd_bssid(struct hostapd_iface *iface,
+ const u8 *bssid)
+{
+ size_t i;
+
+ if (bssid == NULL)
+ return NULL;
+ if (bssid[0] == 0xff && bssid[1] == 0xff && bssid[2] == 0xff &&
+ bssid[3] == 0xff && bssid[4] == 0xff && bssid[5] == 0xff)
+ return HAPD_BROADCAST;
+
+ for (i = 0; i < iface->num_bss; i++) {
+ if (os_memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0)
+ return iface->bss[i];
+ }
+
+ return NULL;
+}
+
+
+static void hostapd_rx_from_unknown_sta(struct hostapd_data *hapd,
+ const u8 *frame, size_t len)
+{
+ const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *) frame;
+ u16 fc = le_to_host16(hdr->frame_control);
+ hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
+ if (hapd == NULL || hapd == HAPD_BROADCAST)
+ return;
+
+ ieee802_11_rx_from_unknown(hapd, hdr->addr2,
+ (fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) ==
+ (WLAN_FC_TODS | WLAN_FC_FROMDS));
+}
+
+
+static void hostapd_mgmt_rx(struct hostapd_data *hapd, struct rx_mgmt *rx_mgmt)
+{
+ struct hostapd_iface *iface = hapd->iface;
+ const struct ieee80211_hdr *hdr;
+ const u8 *bssid;
+ struct hostapd_frame_info fi;
+
+ hdr = (const struct ieee80211_hdr *) rx_mgmt->frame;
+ bssid = get_hdr_bssid(hdr, rx_mgmt->frame_len);
+ if (bssid == NULL)
+ return;
+
+ hapd = get_hapd_bssid(iface, bssid);
+ if (hapd == NULL) {
+ u16 fc;
+ fc = le_to_host16(hdr->frame_control);
+
+ /*
+ * Drop frames to unknown BSSIDs except for Beacon frames which
+ * could be used to update neighbor information.
+ */
+ if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
+ WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
+ hapd = iface->bss[0];
+ else
+ return;
+ }
+
+ os_memset(&fi, 0, sizeof(fi));
+ fi.datarate = rx_mgmt->datarate;
+ fi.ssi_signal = rx_mgmt->ssi_signal;
+
+ if (hapd == HAPD_BROADCAST) {
+ size_t i;
+ for (i = 0; i < iface->num_bss; i++)
+ ieee802_11_mgmt(iface->bss[i], rx_mgmt->frame,
+ rx_mgmt->frame_len, &fi);
+ } else
+ ieee802_11_mgmt(hapd, rx_mgmt->frame, rx_mgmt->frame_len, &fi);
+
+ random_add_randomness(&fi, sizeof(fi));
+}
+
+
+static void hostapd_mgmt_tx_cb(struct hostapd_data *hapd, const u8 *buf,
+ size_t len, u16 stype, int ok)
+{
+ struct ieee80211_hdr *hdr;
+ hdr = (struct ieee80211_hdr *) buf;
+ hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
+ if (hapd == NULL || hapd == HAPD_BROADCAST)
+ return;
+ ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
+}
+
+#endif /* NEED_AP_MLME */
+
+
+static int hostapd_event_new_sta(struct hostapd_data *hapd, const u8 *addr)
+{
+ struct sta_info *sta = ap_get_sta(hapd, addr);
+ if (sta)
+ return 0;
+
+ wpa_printf(MSG_DEBUG, "Data frame from unknown STA " MACSTR
+ " - adding a new STA", MAC2STR(addr));
+ sta = ap_sta_add(hapd, addr);
+ if (sta) {
+ hostapd_new_assoc_sta(hapd, sta, 0);
+ } else {
+ wpa_printf(MSG_DEBUG, "Failed to add STA entry for " MACSTR,
+ MAC2STR(addr));
+ return -1;
+ }
+
+ return 0;
+}
+
+
+static void hostapd_event_eapol_rx(struct hostapd_data *hapd, const u8 *src,
+ const u8 *data, size_t data_len)
+{
+ struct hostapd_iface *iface = hapd->iface;
+ size_t j;
+
+ for (j = 0; j < iface->num_bss; j++) {
+ if (ap_get_sta(iface->bss[j], src)) {
+ hapd = iface->bss[j];
+ break;
+ }
+ }
+
+ ieee802_1x_receive(hapd, src, data, data_len);
+}
+
+
+void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
+ union wpa_event_data *data)
+{
+ struct hostapd_data *hapd = ctx;
+
+ switch (event) {
+ case EVENT_MICHAEL_MIC_FAILURE:
+ michael_mic_failure(hapd, data->michael_mic_failure.src, 1);
+ break;
+ case EVENT_SCAN_RESULTS:
+ if (hapd->iface->scan_cb)
+ hapd->iface->scan_cb(hapd->iface);
+ break;
+#ifdef CONFIG_IEEE80211R
+ case EVENT_FT_RRB_RX:
+ wpa_ft_rrb_rx(hapd->wpa_auth, data->ft_rrb_rx.src,
+ data->ft_rrb_rx.data, data->ft_rrb_rx.data_len);
+ break;
+#endif /* CONFIG_IEEE80211R */
+ case EVENT_WPS_BUTTON_PUSHED:
+ hostapd_wps_button_pushed(hapd, NULL);
+ break;
+#ifdef NEED_AP_MLME
+ case EVENT_TX_STATUS:
+ switch (data->tx_status.type) {
+ case WLAN_FC_TYPE_MGMT:
+ hostapd_mgmt_tx_cb(hapd, data->tx_status.data,
+ data->tx_status.data_len,
+ data->tx_status.stype,
+ data->tx_status.ack);
+ break;
+ case WLAN_FC_TYPE_DATA:
+ hostapd_tx_status(hapd, data->tx_status.dst,
+ data->tx_status.data,
+ data->tx_status.data_len,
+ data->tx_status.ack);
+ break;
+ }
+ break;
+ case EVENT_RX_FROM_UNKNOWN:
+ hostapd_rx_from_unknown_sta(hapd, data->rx_from_unknown.frame,
+ data->rx_from_unknown.len);
+ break;
+ case EVENT_RX_MGMT:
+ hostapd_mgmt_rx(hapd, &data->rx_mgmt);
+ break;
+#endif /* NEED_AP_MLME */
+ case EVENT_RX_PROBE_REQ:
+ if (data->rx_probe_req.sa == NULL ||
+ data->rx_probe_req.ie == NULL)
+ break;
+ hostapd_probe_req_rx(hapd, data->rx_probe_req.sa,
+ data->rx_probe_req.ie,
+ data->rx_probe_req.ie_len);
+ break;
+ case EVENT_NEW_STA:
+ hostapd_event_new_sta(hapd, data->new_sta.addr);
+ break;
+ case EVENT_EAPOL_RX:
+ hostapd_event_eapol_rx(hapd, data->eapol_rx.src,
+ data->eapol_rx.data,
+ data->eapol_rx.data_len);
+ break;
+ case EVENT_ASSOC:
+ hostapd_notif_assoc(hapd, data->assoc_info.addr,
+ data->assoc_info.req_ies,
+ data->assoc_info.req_ies_len,
+ data->assoc_info.reassoc);
+ break;
+ case EVENT_DISASSOC:
+ if (data)
+ hostapd_notif_disassoc(hapd, data->disassoc_info.addr);
+ break;
+ case EVENT_DEAUTH:
+ if (data)
+ hostapd_notif_disassoc(hapd, data->deauth_info.addr);
+ break;
+ case EVENT_STATION_LOW_ACK:
+ if (!data)
+ break;
+ hostapd_event_sta_low_ack(hapd, data->low_ack.addr);
+ break;
+ default:
+ wpa_printf(MSG_DEBUG, "Unknown event %d", event);
+ break;
+ }
+}
+
+#endif /* HOSTAPD */