2 * hostapd / Callback functions for driver wrappers
3 * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
19 #include "ieee802_11.h"
20 #include "radius/radius.h"
22 #include "accounting.h"
23 #include "tkip_countermeasures.h"
24 #include "ieee802_1x.h"
31 struct hostapd_data *hapd;
35 static int prune_associations(struct hostapd_iface *iface, void *ctx)
37 struct prune_data *data = ctx;
38 struct sta_info *osta;
39 struct hostapd_data *ohapd;
42 for (j = 0; j < iface->num_bss; j++) {
43 ohapd = iface->bss[j];
44 if (ohapd == data->hapd)
46 osta = ap_get_sta(ohapd, data->addr);
50 ap_sta_disassociate(ohapd, osta, WLAN_REASON_UNSPECIFIED);
57 * hostapd_prune_associations - Remove extraneous associations
58 * @hapd: Pointer to BSS data for the most recent association
59 * @sta: Pointer to the associated STA data
61 * This function looks through all radios and BSS's for previous
62 * (stale) associations of STA. If any are found they are removed.
64 static void hostapd_prune_associations(struct hostapd_data *hapd,
67 struct prune_data data;
69 data.addr = sta->addr;
70 hostapd_for_each_interface(prune_associations, &data);
75 * hostapd_new_assoc_sta - Notify that a new station associated with the AP
76 * @hapd: Pointer to BSS data
77 * @sta: Pointer to the associated STA data
78 * @reassoc: 1 to indicate this was a re-association; 0 = first association
80 * This function will be called whenever a station associates with the AP. It
81 * can be called from ieee802_11.c for drivers that export MLME to hostapd and
82 * from driver_*.c for drivers that take care of management frames (IEEE 802.11
83 * authentication and association) internally.
85 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
88 if (hapd->tkip_countermeasures) {
89 hostapd_sta_deauth(hapd, sta->addr,
90 WLAN_REASON_MICHAEL_MIC_FAILURE);
94 hostapd_prune_associations(hapd, sta);
96 /* IEEE 802.11F (IAPP) */
97 if (hapd->conf->ieee802_11f)
98 iapp_new_station(hapd->iapp, sta);
100 /* Start accounting here, if IEEE 802.1X and WPA are not used.
101 * IEEE 802.1X/WPA code will start accounting after the station has
102 * been authorized. */
103 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
104 accounting_sta_start(hapd, sta);
106 hostapd_wmm_sta_config(hapd, sta);
108 /* Start IEEE 802.1X authentication process for new stations */
109 ieee802_1x_new_station(hapd, sta);
111 if (sta->auth_alg != WLAN_AUTH_FT &&
112 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
113 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
115 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
119 void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr,
120 const u8 *buf, size_t len, int ack)
122 struct sta_info *sta;
124 sta = ap_get_sta(hapd, addr);
125 if (sta && sta->flags & WLAN_STA_PENDING_POLL) {
126 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
127 "activity poll", MAC2STR(sta->addr),
128 ack ? "ACKed" : "did not ACK");
130 sta->flags &= ~WLAN_STA_PENDING_POLL;
133 ieee802_1x_tx_status(hapd, sta, buf, len, ack);
137 void hostapd_rx_from_unknown_sta(struct hostapd_data *hapd, const u8 *addr)
139 struct sta_info *sta;
141 sta = ap_get_sta(hapd, addr);
142 if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
143 wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated "
144 "STA " MACSTR, MAC2STR(addr));
145 if (sta && (sta->flags & WLAN_STA_AUTH))
146 hostapd_sta_disassoc(
148 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
152 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
157 int hostapd_notif_assoc(struct hostapd_data *hapd, const u8 *addr,
158 const u8 *ie, size_t ielen)
160 struct sta_info *sta;
163 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
164 HOSTAPD_LEVEL_INFO, "associated");
166 sta = ap_get_sta(hapd, addr);
168 accounting_sta_stop(hapd, sta);
170 sta = ap_sta_add(hapd, addr);
174 sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS);
176 if (hapd->conf->wpa) {
177 if (ie == NULL || ielen == 0) {
178 if (hapd->conf->wps_state) {
179 wpa_printf(MSG_DEBUG, "STA did not include "
180 "WPA/RSN IE in (Re)Association "
181 "Request - possible WPS use");
182 sta->flags |= WLAN_STA_MAYBE_WPS;
186 wpa_printf(MSG_DEBUG, "No WPA/RSN IE from STA");
189 if (hapd->conf->wps_state && ie[0] == 0xdd && ie[1] >= 4 &&
190 os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
191 sta->flags |= WLAN_STA_WPS;
195 if (sta->wpa_sm == NULL)
196 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
198 if (sta->wpa_sm == NULL) {
199 wpa_printf(MSG_ERROR, "Failed to initialize WPA state "
203 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
205 if (res != WPA_IE_OK) {
206 wpa_printf(MSG_DEBUG, "WPA/RSN information element "
207 "rejected? (res %u)", res);
208 wpa_hexdump(MSG_DEBUG, "IE", ie, ielen);
211 } else if (hapd->conf->wps_state) {
212 if (ie && ielen > 4 && ie[0] == 0xdd && ie[1] >= 4 &&
213 os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
214 sta->flags |= WLAN_STA_WPS;
216 sta->flags |= WLAN_STA_MAYBE_WPS;
220 new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
221 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
222 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
224 hostapd_new_assoc_sta(hapd, sta, !new_assoc);
226 ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
232 void hostapd_notif_disassoc(struct hostapd_data *hapd, const u8 *addr)
234 struct sta_info *sta;
236 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
237 HOSTAPD_LEVEL_INFO, "disassociated");
239 sta = ap_get_sta(hapd, addr);
241 wpa_printf(MSG_DEBUG, "Disassociation notification for "
242 "unknown STA " MACSTR, MAC2STR(addr));
246 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
247 wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
248 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
249 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
250 ap_free_sta(hapd, sta);
254 void hostapd_eapol_receive(struct hostapd_data *hapd, const u8 *sa,
255 const u8 *buf, size_t len)
257 ieee802_1x_receive(hapd, sa, buf, len);
262 void hostapd_mgmt_rx(struct hostapd_data *hapd, u8 *buf, size_t len,
263 u16 stype, struct hostapd_frame_info *fi)
265 ieee802_11_mgmt(hapd, buf, len, stype, fi);
269 void hostapd_mgmt_tx_cb(struct hostapd_data *hapd, u8 *buf, size_t len,
272 ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
274 #endif /* NEED_MLME */
277 void hostapd_michael_mic_failure(struct hostapd_data *hapd, const u8 *addr)
279 michael_mic_failure(hapd, addr, 1);
283 struct hostapd_data * hostapd_sta_get_bss(struct hostapd_data *hapd,
286 struct hostapd_iface *iface = hapd->iface;
289 for (j = 0; j < iface->num_bss; j++) {
290 hapd = iface->bss[j];
291 if (ap_get_sta(hapd, addr))