Add station tracking based on other management frame subtypes
[mech_eap.git] / src / ap / beacon.c
index 38600e6..5fe8fd5 100644 (file)
@@ -15,6 +15,7 @@
 #include "utils/common.h"
 #include "common/ieee802_11_defs.h"
 #include "common/ieee802_11_common.h"
+#include "common/hw_features_common.h"
 #include "wps/wps_defs.h"
 #include "p2p/p2p.h"
 #include "hostapd.h"
 
 #ifdef NEED_AP_MLME
 
+static u8 * hostapd_eid_rm_enabled_capab(struct hostapd_data *hapd, u8 *eid,
+                                        size_t len)
+{
+       if (!hapd->conf->radio_measurements || len < 2 + 4)
+               return eid;
+
+       *eid++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
+       *eid++ = 5;
+       *eid++ = (hapd->conf->radio_measurements & BIT(0)) ?
+               WLAN_RRM_CAPS_NEIGHBOR_REPORT : 0x00;
+       *eid++ = 0x00;
+       *eid++ = 0x00;
+       *eid++ = 0x00;
+       *eid++ = 0x00;
+       return eid;
+}
+
+
 static u8 * hostapd_eid_bss_load(struct hostapd_data *hapd, u8 *eid, size_t len)
 {
+       if (len < 2 + 5)
+               return eid;
+
 #ifdef CONFIG_TESTING_OPTIONS
        if (hapd->conf->bss_load_test_set) {
-               if (2 + 5 > len)
-                       return eid;
                *eid++ = WLAN_EID_BSS_LOAD;
                *eid++ = 5;
                os_memcpy(eid, hapd->conf->bss_load_test, 5);
                eid += 5;
+               return eid;
        }
 #endif /* CONFIG_TESTING_OPTIONS */
+       if (hapd->conf->bss_load_update_period) {
+               *eid++ = WLAN_EID_BSS_LOAD;
+               *eid++ = 5;
+               WPA_PUT_LE16(eid, hapd->num_sta);
+               eid += 2;
+               *eid++ = hapd->iface->channel_utilization;
+               WPA_PUT_LE16(eid, 0); /* no available admission capabity */
+               eid += 2;
+       }
        return eid;
 }
 
@@ -113,6 +143,10 @@ static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid)
            hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
                return eid;
 
+       /* Let host drivers add this IE if DFS support is offloaded */
+       if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)
+               return eid;
+
        /*
         * There is no DFS support and power constraint was not directly
         * requested by config option.
@@ -220,7 +254,7 @@ static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
                        continue; /* can use same entry */
                }
 
-               if (start) {
+               if (start && prev) {
                        pos = hostapd_eid_country_add(pos, end, chan_spacing,
                                                      start, prev);
                        start = NULL;
@@ -265,18 +299,18 @@ static u8 * hostapd_eid_csa(struct hostapd_data *hapd, u8 *eid)
 {
        u8 chan;
 
-       if (!hapd->iface->cs_freq_params.freq)
+       if (!hapd->cs_freq_params.freq)
                return eid;
 
-       if (ieee80211_freq_to_chan(hapd->iface->cs_freq_params.freq, &chan) ==
+       if (ieee80211_freq_to_chan(hapd->cs_freq_params.freq, &chan) ==
            NUM_HOSTAPD_MODES)
                return eid;
 
        *eid++ = WLAN_EID_CHANNEL_SWITCH;
        *eid++ = 3;
-       *eid++ = hapd->iface->cs_block_tx;
+       *eid++ = hapd->cs_block_tx;
        *eid++ = chan;
-       *eid++ = hapd->iface->cs_count;
+       *eid++ = hapd->cs_count;
 
        return eid;
 }
@@ -286,12 +320,12 @@ static u8 * hostapd_eid_secondary_channel(struct hostapd_data *hapd, u8 *eid)
 {
        u8 sec_ch;
 
-       if (!hapd->iface->cs_freq_params.sec_channel_offset)
+       if (!hapd->cs_freq_params.sec_channel_offset)
                return eid;
 
-       if (hapd->iface->cs_freq_params.sec_channel_offset == -1)
+       if (hapd->cs_freq_params.sec_channel_offset == -1)
                sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW;
-       else if (hapd->iface->cs_freq_params.sec_channel_offset == 1)
+       else if (hapd->cs_freq_params.sec_channel_offset == 1)
                sec_ch = HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE;
        else
                return eid;
@@ -326,7 +360,6 @@ static u8 * hostapd_add_csa_elems(struct hostapd_data *hapd, u8 *pos,
 
 
 static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
-                                  struct sta_info *sta,
                                   const struct ieee80211_mgmt *req,
                                   int is_p2p, size_t *resp_len)
 {
@@ -344,8 +377,16 @@ static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
        if (hapd->p2p_probe_resp_ie)
                buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
 #endif /* CONFIG_P2P */
+#ifdef CONFIG_FST
+       if (hapd->iface->fst_ies)
+               buflen += wpabuf_len(hapd->iface->fst_ies);
+#endif /* CONFIG_FST */
        if (hapd->conf->vendor_elements)
                buflen += wpabuf_len(hapd->conf->vendor_elements);
+       if (hapd->conf->vendor_vht) {
+               buflen += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
+                       2 + sizeof(struct ieee80211_vht_operation);
+       }
        resp = os_zalloc(buflen);
        if (resp == NULL)
                return NULL;
@@ -364,7 +405,7 @@ static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 
        /* hardware or low-level driver will setup seq_ctrl and timestamp */
        resp->u.probe_resp.capab_info =
-               host_to_le16(hostapd_own_capab_info(hapd, sta, 1));
+               host_to_le16(hostapd_own_capab_info(hapd));
 
        pos = resp->u.probe_resp.variable;
        *pos++ = WLAN_EID_SSID;
@@ -394,6 +435,8 @@ static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
 
        pos = hostapd_eid_bss_load(hapd, pos, epos - pos);
 
+       pos = hostapd_eid_rm_enabled_capab(hapd, pos, epos - pos);
+
 #ifdef CONFIG_IEEE80211N
        pos = hostapd_eid_ht_capabilities(hapd, pos);
        pos = hostapd_eid_ht_operation(hapd, pos);
@@ -409,10 +452,23 @@ static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
        pos = hostapd_eid_roaming_consortium(hapd, pos);
 
        pos = hostapd_add_csa_elems(hapd, pos, (u8 *)resp,
-                                   &hapd->iface->cs_c_off_proberesp);
+                                   &hapd->cs_c_off_proberesp);
+
+#ifdef CONFIG_FST
+       if (hapd->iface->fst_ies) {
+               os_memcpy(pos, wpabuf_head(hapd->iface->fst_ies),
+                         wpabuf_len(hapd->iface->fst_ies));
+               pos += wpabuf_len(hapd->iface->fst_ies);
+       }
+#endif /* CONFIG_FST */
+
 #ifdef CONFIG_IEEE80211AC
-       pos = hostapd_eid_vht_capabilities(hapd, pos);
-       pos = hostapd_eid_vht_operation(hapd, pos);
+       if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
+               pos = hostapd_eid_vht_capabilities(hapd, pos);
+               pos = hostapd_eid_vht_operation(hapd, pos);
+       }
+       if (hapd->conf->vendor_vht)
+               pos = hostapd_eid_vendor_vht(hapd, pos);
 #endif /* CONFIG_IEEE80211AC */
 
        /* Wi-Fi Alliance WMM */
@@ -496,6 +552,102 @@ static enum ssid_match_result ssid_match(struct hostapd_data *hapd,
 }
 
 
+void sta_track_expire(struct hostapd_iface *iface, int force)
+{
+       struct os_reltime now;
+       struct hostapd_sta_info *info;
+
+       if (!iface->num_sta_seen)
+               return;
+
+       os_get_reltime(&now);
+       while ((info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
+                                    list))) {
+               if (!force &&
+                   !os_reltime_expired(&now, &info->last_seen,
+                                       iface->conf->track_sta_max_age))
+                       break;
+               force = 0;
+
+               wpa_printf(MSG_MSGDUMP, "%s: Expire STA tracking entry for "
+                          MACSTR, iface->bss[0]->conf->iface,
+                          MAC2STR(info->addr));
+               dl_list_del(&info->list);
+               iface->num_sta_seen--;
+               os_free(info);
+       }
+}
+
+
+static struct hostapd_sta_info * sta_track_get(struct hostapd_iface *iface,
+                                              const u8 *addr)
+{
+       struct hostapd_sta_info *info;
+
+       dl_list_for_each(info, &iface->sta_seen, struct hostapd_sta_info, list)
+               if (os_memcmp(addr, info->addr, ETH_ALEN) == 0)
+                       return info;
+
+       return NULL;
+}
+
+
+void sta_track_add(struct hostapd_iface *iface, const u8 *addr)
+{
+       struct hostapd_sta_info *info;
+
+       info = sta_track_get(iface, addr);
+       if (info) {
+               /* Move the most recent entry to the end of the list */
+               dl_list_del(&info->list);
+               dl_list_add_tail(&iface->sta_seen, &info->list);
+               os_get_reltime(&info->last_seen);
+               return;
+       }
+
+       /* Add a new entry */
+       info = os_zalloc(sizeof(*info));
+       os_memcpy(info->addr, addr, ETH_ALEN);
+       os_get_reltime(&info->last_seen);
+
+       if (iface->num_sta_seen >= iface->conf->track_sta_max_num) {
+               /* Expire oldest entry to make room for a new one */
+               sta_track_expire(iface, 1);
+       }
+
+       wpa_printf(MSG_MSGDUMP, "%s: Add STA tracking entry for "
+                  MACSTR, iface->bss[0]->conf->iface, MAC2STR(addr));
+       dl_list_add_tail(&iface->sta_seen, &info->list);
+       iface->num_sta_seen++;
+}
+
+
+struct hostapd_data *
+sta_track_seen_on(struct hostapd_iface *iface, const u8 *addr,
+                 const char *ifname)
+{
+       struct hapd_interfaces *interfaces = iface->interfaces;
+       size_t i, j;
+
+       for (i = 0; i < interfaces->count; i++) {
+               struct hostapd_data *hapd = NULL;
+
+               iface = interfaces->iface[i];
+               for (j = 0; j < iface->num_bss; j++) {
+                       hapd = iface->bss[j];
+                       if (os_strcmp(ifname, hapd->conf->iface) == 0)
+                               break;
+                       hapd = NULL;
+               }
+
+               if (hapd && sta_track_get(iface, addr))
+                       return hapd;
+       }
+
+       return NULL;
+}
+
+
 void handle_probe_req(struct hostapd_data *hapd,
                      const struct ieee80211_mgmt *mgmt, size_t len,
                      int ssi_signal)
@@ -504,7 +656,6 @@ void handle_probe_req(struct hostapd_data *hapd,
        struct ieee802_11_elems elems;
        const u8 *ie;
        size_t ie_len;
-       struct sta_info *sta = NULL;
        size_t i, resp_len;
        int noack;
        enum ssid_match_result res;
@@ -512,6 +663,8 @@ void handle_probe_req(struct hostapd_data *hapd,
        ie = mgmt->u.probe_req.variable;
        if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
                return;
+       if (hapd->iconf->track_sta_max_num)
+               sta_track_add(hapd->iface, mgmt->sa);
        ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
 
        for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
@@ -536,6 +689,27 @@ void handle_probe_req(struct hostapd_data *hapd,
                return;
        }
 
+       /*
+        * No need to reply if the Probe Request frame was sent on an adjacent
+        * channel. IEEE Std 802.11-2012 describes this as a requirement for an
+        * AP with dot11RadioMeasurementActivated set to true, but strictly
+        * speaking does not allow such ignoring of Probe Request frames if
+        * dot11RadioMeasurementActivated is false. Anyway, this can help reduce
+        * number of unnecessary Probe Response frames for cases where the STA
+        * is less likely to see them (Probe Request frame sent on a
+        * neighboring, but partially overlapping, channel).
+        */
+       if (elems.ds_params &&
+           hapd->iface->current_mode &&
+           (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G ||
+            hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211B) &&
+           hapd->iconf->channel != elems.ds_params[0]) {
+               wpa_printf(MSG_DEBUG,
+                          "Ignore Probe Request due to DS Params mismatch: chan=%u != ds.chan=%u",
+                          hapd->iconf->channel, elems.ds_params[0]);
+               return;
+       }
+
 #ifdef CONFIG_P2P
        if (hapd->p2p && elems.wps_ie) {
                struct wpabuf *wps;
@@ -570,8 +744,6 @@ void handle_probe_req(struct hostapd_data *hapd,
                return;
        }
 
-       sta = ap_get_sta(hapd, mgmt->sa);
-
 #ifdef CONFIG_P2P
        if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
            elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
@@ -584,10 +756,7 @@ void handle_probe_req(struct hostapd_data *hapd,
 
        res = ssid_match(hapd, elems.ssid, elems.ssid_len,
                         elems.ssid_list, elems.ssid_list_len);
-       if (res != NO_SSID_MATCH) {
-               if (sta)
-                       sta->ssid_probe = &hapd->conf->ssid;
-       } else {
+       if (res == NO_SSID_MATCH) {
                if (!(mgmt->da[0] & 0x01)) {
                        wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
                                   " for foreign SSID '%s' (DA " MACSTR ")%s",
@@ -644,8 +813,20 @@ void handle_probe_req(struct hostapd_data *hapd,
        /* TODO: verify that supp_rates contains at least one matching rate
         * with AP configuration */
 
+       if (hapd->conf->no_probe_resp_if_seen_on &&
+           is_multicast_ether_addr(mgmt->da) &&
+           is_multicast_ether_addr(mgmt->bssid) &&
+           sta_track_seen_on(hapd->iface, mgmt->sa,
+                             hapd->conf->no_probe_resp_if_seen_on)) {
+               wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
+                          " since STA has been seen on %s",
+                          hapd->conf->iface, MAC2STR(mgmt->sa),
+                          hapd->conf->no_probe_resp_if_seen_on);
+               return;
+       }
+
 #ifdef CONFIG_TESTING_OPTIONS
-       if (hapd->iconf->ignore_probe_probability > 0.0d &&
+       if (hapd->iconf->ignore_probe_probability > 0.0 &&
            drand48() < hapd->iconf->ignore_probe_probability) {
                wpa_printf(MSG_INFO,
                           "TESTING: ignoring probe request from " MACSTR,
@@ -654,7 +835,7 @@ void handle_probe_req(struct hostapd_data *hapd,
        }
 #endif /* CONFIG_TESTING_OPTIONS */
 
-       resp = hostapd_gen_probe_resp(hapd, sta, mgmt, elems.p2p != NULL,
+       resp = hostapd_gen_probe_resp(hapd, mgmt, elems.p2p != NULL,
                                      &resp_len);
        if (resp == NULL)
                return;
@@ -709,7 +890,7 @@ static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
                           "this");
 
        /* Generate a Probe Response template for the non-P2P case */
-       return hostapd_gen_probe_resp(hapd, NULL, NULL, 0, resp_len);
+       return hostapd_gen_probe_resp(hapd, NULL, 0, resp_len);
 }
 
 #endif /* NEED_AP_MLME */
@@ -739,8 +920,20 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
        if (hapd->p2p_beacon_ie)
                tail_len += wpabuf_len(hapd->p2p_beacon_ie);
 #endif /* CONFIG_P2P */
+#ifdef CONFIG_FST
+       if (hapd->iface->fst_ies)
+               tail_len += wpabuf_len(hapd->iface->fst_ies);
+#endif /* CONFIG_FST */
        if (hapd->conf->vendor_elements)
                tail_len += wpabuf_len(hapd->conf->vendor_elements);
+
+#ifdef CONFIG_IEEE80211AC
+       if (hapd->conf->vendor_vht) {
+               tail_len += 5 + 2 + sizeof(struct ieee80211_vht_capabilities) +
+                       2 + sizeof(struct ieee80211_vht_operation);
+       }
+#endif /* CONFIG_IEEE80211AC */
+
        tailpos = tail = os_malloc(tail_len);
        if (head == NULL || tail == NULL) {
                wpa_printf(MSG_ERROR, "Failed to set beacon data");
@@ -760,7 +953,7 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
                host_to_le16(hapd->iconf->beacon_int);
 
        /* hardware or low-level driver will setup seq_ctrl and timestamp */
-       capab_info = hostapd_own_capab_info(hapd, NULL, 0);
+       capab_info = hostapd_own_capab_info(hapd);
        head->u.beacon.capab_info = host_to_le16(capab_info);
        pos = &head->u.beacon.variable[0];
 
@@ -804,6 +997,10 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
        tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
                                  tailpos);
 
+       tailpos = hostapd_eid_rm_enabled_capab(hapd, tailpos,
+                                              tail + BEACON_TAIL_BUF_SIZE -
+                                              tailpos);
+
        tailpos = hostapd_eid_bss_load(hapd, tailpos,
                                       tail + BEACON_TAIL_BUF_SIZE - tailpos);
 
@@ -824,10 +1021,23 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
        tailpos = hostapd_eid_adv_proto(hapd, tailpos);
        tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
        tailpos = hostapd_add_csa_elems(hapd, tailpos, tail,
-                                       &hapd->iface->cs_c_off_beacon);
+                                       &hapd->cs_c_off_beacon);
+
+#ifdef CONFIG_FST
+       if (hapd->iface->fst_ies) {
+               os_memcpy(tailpos, wpabuf_head(hapd->iface->fst_ies),
+                         wpabuf_len(hapd->iface->fst_ies));
+               tailpos += wpabuf_len(hapd->iface->fst_ies);
+       }
+#endif /* CONFIG_FST */
+
 #ifdef CONFIG_IEEE80211AC
-       tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
-       tailpos = hostapd_eid_vht_operation(hapd, tailpos);
+       if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
+               tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
+               tailpos = hostapd_eid_vht_operation(hapd, tailpos);
+       }
+       if (hapd->conf->vendor_vht)
+               tailpos = hostapd_eid_vendor_vht(hapd, tailpos);
 #endif /* CONFIG_IEEE80211AC */
 
        /* Wi-Fi Alliance WMM */
@@ -882,8 +1092,14 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
        params->basic_rates = hapd->iface->basic_rates;
        params->ssid = hapd->conf->ssid.ssid;
        params->ssid_len = hapd->conf->ssid.ssid_len;
-       params->pairwise_ciphers = hapd->conf->rsn_pairwise ?
-               hapd->conf->rsn_pairwise : hapd->conf->wpa_pairwise;
+       if ((hapd->conf->wpa & (WPA_PROTO_WPA | WPA_PROTO_RSN)) ==
+           (WPA_PROTO_WPA | WPA_PROTO_RSN))
+               params->pairwise_ciphers = hapd->conf->wpa_pairwise |
+                       hapd->conf->rsn_pairwise;
+       else if (hapd->conf->wpa & WPA_PROTO_RSN)
+               params->pairwise_ciphers = hapd->conf->rsn_pairwise;
+       else if (hapd->conf->wpa & WPA_PROTO_WPA)
+               params->pairwise_ciphers = hapd->conf->wpa_pairwise;
        params->group_cipher = hapd->conf->wpa_group;
        params->key_mgmt_suites = hapd->conf->wpa_key_mgmt;
        params->auth_algs = hapd->conf->auth_algs;
@@ -904,6 +1120,7 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
                break;
        }
        params->isolate = hapd->conf->isolate;
+       params->smps_mode = hapd->iconf->ht_capab & HT_CAP_INFO_SMPS_MASK;
 #ifdef NEED_AP_MLME
        params->cts_protect = !!(ieee802_11_erp_info(hapd) &
                                ERP_INFO_USE_PROTECTION);
@@ -926,6 +1143,9 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
                params->hessid = hapd->conf->hessid;
        params->access_network_type = hapd->conf->access_network_type;
        params->ap_max_inactivity = hapd->conf->ap_max_inactivity;
+#ifdef CONFIG_P2P
+       params->p2p_go_ctwindow = hapd->iconf->p2p_go_ctwindow;
+#endif /* CONFIG_P2P */
 #ifdef CONFIG_HS20
        params->disable_dgaf = hapd->conf->disable_dgaf;
        if (hapd->conf->osen) {
@@ -957,7 +1177,7 @@ int ieee802_11_set_beacon(struct hostapd_data *hapd)
        struct wpabuf *beacon, *proberesp, *assocresp;
        int res, ret = -1;
 
-       if (hapd->iface->csa_in_progress) {
+       if (hapd->csa_in_progress) {
                wpa_printf(MSG_ERROR, "Cannot set beacons during CSA period");
                return -1;
        }
@@ -974,6 +1194,8 @@ int ieee802_11_set_beacon(struct hostapd_data *hapd)
        params.beacon_ies = beacon;
        params.proberesp_ies = proberesp;
        params.assocresp_ies = assocresp;
+       params.reenable = hapd->reenable_beacon;
+       hapd->reenable_beacon = 0;
 
        if (iface->current_mode &&
            hostapd_set_freq_params(&freq, iconf->hw_mode, iface->freq,