[PATCH 09/19] hostapd: Handle neighbor report request
Ilan Peer
ilan.peer at intel.com
Tue Apr 5 06:08:02 PDT 2016
From: David Spinadel <david.spinadel at intel.com>
Handle neighbor report request and send neighbor report
response, based on configured neighbor report data.
Signed-off-by: David Spinadel <david.spinadel at intel.com>
---
hostapd/Android.mk | 1 +
hostapd/Makefile | 1 +
src/ap/ieee802_11.c | 4 +
src/ap/rrm.c | 235 +++++++++++++++++++++++++++++++++++++++++++
src/ap/rrm.h | 16 +++
src/common/ieee802_11_defs.h | 7 ++
wpa_supplicant/Android.mk | 1 +
wpa_supplicant/Makefile | 1 +
8 files changed, 266 insertions(+)
create mode 100644 src/ap/rrm.c
create mode 100644 src/ap/rrm.h
diff --git a/hostapd/Android.mk b/hostapd/Android.mk
index 42f67bc..c7467fd 100644
--- a/hostapd/Android.mk
+++ b/hostapd/Android.mk
@@ -97,6 +97,7 @@ OBJS += src/ap/ieee802_11_shared.c
OBJS += src/ap/beacon.c
OBJS += src/ap/bss_load.c
OBJS += src/ap/neighbor_db.c
+OBJS += src/ap/rrm.c
OBJS_d =
OBJS_p =
LIBS =
diff --git a/hostapd/Makefile b/hostapd/Makefile
index 35b055c..baa7819 100644
--- a/hostapd/Makefile
+++ b/hostapd/Makefile
@@ -85,6 +85,7 @@ OBJS += ../src/ap/ieee802_11_shared.o
OBJS += ../src/ap/beacon.o
OBJS += ../src/ap/bss_load.o
OBJS += ../src/ap/neighbor_db.o
+OBJS += ../src/ap/rrm.o
OBJS_c = hostapd_cli.o ../src/common/wpa_ctrl.o ../src/utils/os_$(CONFIG_OS).o
diff --git a/src/ap/ieee802_11.c b/src/ap/ieee802_11.c
index b1ce56d..4f65cf3 100644
--- a/src/ap/ieee802_11.c
+++ b/src/ap/ieee802_11.c
@@ -43,6 +43,7 @@
#include "ieee802_11.h"
#include "dfs.h"
#include "mbo_ap.h"
+#include "rrm.h"
u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid)
@@ -2472,6 +2473,9 @@ static int handle_action(struct hostapd_data *hapd,
return 1;
}
break;
+ case WLAN_ACTION_RADIO_MEASUREMENT:
+ hostapd_handle_radio_measurement(hapd, (u8 *)mgmt, len);
+ return 1;
}
hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
diff --git a/src/ap/rrm.c b/src/ap/rrm.c
new file mode 100644
index 0000000..7df25ae
--- /dev/null
+++ b/src/ap/rrm.c
@@ -0,0 +1,235 @@
+/*
+ * hostapd / Radio Measurement (RRM)
+ * Copyright(c) 2013 - 2016 Intel Mobile Communications GmbH.
+ * Copyright(c) 2011 - 2016 Intel Corporation. All rights reserved.
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "utils/includes.h"
+#include "utils/common.h"
+#include "hostapd.h"
+#include "ap_drv_ops.h"
+
+
+static u16 hostapd_parse_location_lci_req_age(const u8 *buf, size_t len)
+{
+ const u8 *subelem;
+
+ /* Range req IE + Location subject + max age subelement */
+ if (len < 3 + 1 + 4)
+ return 0;
+
+ /* Subelements are arranged as IEs */
+ subelem = get_ie(buf + 4, len - 4, LCI_REQ_SUBELEMENT_MAX_AGE);
+ if (subelem && subelem[1] == 2)
+ return *(u16 *)(subelem + 2);
+
+ return 0;
+}
+
+static int hostapd_check_lci_age(struct hostapd_neighbor_entry *nr, u16 max_age)
+{
+ struct os_time curr, diff;
+ unsigned long diff_l;
+
+ if (!max_age)
+ return 0;
+
+ if (max_age == 0xffff)
+ return 1;
+
+ if (os_get_time(&curr))
+ return 0;
+
+ os_time_sub(&curr, &nr->lci_date, &diff);
+
+ /* avoid overflow */
+ if (diff.sec > 0xffff)
+ return 0;
+
+ /* LCI age is calculated in 10th of a second units. */
+ diff_l = diff.sec * 10 + diff.usec / 100000;
+
+ return max_age > diff_l;
+}
+
+
+static size_t hostapd_neighbor_report_len(struct wpabuf *buf,
+ struct hostapd_neighbor_entry *nr,
+ int send_lci, int send_civic)
+{
+ size_t len = 2 + wpabuf_len(nr->nr);
+
+ if (send_lci && nr->lci)
+ len += 2 + wpabuf_len(nr->lci);
+
+ if (send_civic && nr->civic)
+ len += 2 + wpabuf_len(nr->civic);
+
+ return len;
+}
+
+
+static void hostapd_send_nei_report_resp(struct hostapd_data *hapd,
+ const u8 *addr, u8 dialog_token,
+ struct wpa_ssid_value *ssid, u8 lci,
+ u8 civic, u16 lci_max_age)
+{
+ struct hostapd_neighbor_entry *nr;
+ struct wpabuf *buf;
+ u8 *msmt_token;
+
+ /* The number and length of the Neighbor Report Elements in a Neighbor
+ * Report frame is limited by the maximum allowed MMPDU size; + 3 bytes
+ * of RRM header
+ */
+ buf = wpabuf_alloc(3 + IEEE80211_MAX_MMPDU_SIZE);
+ if (!buf)
+ return;
+
+ wpabuf_put_u8(buf, WLAN_ACTION_RADIO_MEASUREMENT);
+ wpabuf_put_u8(buf, WLAN_RRM_NEIGHBOR_REPORT_RESPONSE);
+ wpabuf_put_u8(buf, dialog_token);
+
+ dl_list_for_each(nr, &hapd->nr_db, struct hostapd_neighbor_entry,
+ list) {
+ int send_lci;
+ size_t len;
+
+ if (ssid->ssid_len != nr->ssid.ssid_len ||
+ os_memcmp(ssid->ssid, nr->ssid.ssid, ssid->ssid_len))
+ continue;
+
+ send_lci = (lci != 0) && hostapd_check_lci_age(nr, lci_max_age);
+ len = hostapd_neighbor_report_len(buf, nr, send_lci, civic);
+
+ if (len - 2 > 0xff) {
+ wpa_printf(MSG_DEBUG,
+ "NR entry for " MACSTR " exceeds 0xFF bytes",
+ MAC2STR(nr->bssid));
+ continue;
+ }
+
+ if (len > wpabuf_tailroom(buf))
+ break;
+
+ wpabuf_put_u8(buf, WLAN_EID_NEIGHBOR_REPORT);
+ wpabuf_put_u8(buf, len - 2);
+ wpabuf_put_buf(buf, nr->nr);
+
+ if (send_lci && nr->lci) {
+ wpabuf_put_u8(buf, WLAN_EID_MEASURE_REPORT);
+ wpabuf_put_u8(buf, wpabuf_len(nr->lci));
+ /* overriding measurement token - the first byte of the
+ * measurement IE
+ */
+ msmt_token = wpabuf_mhead_u8(buf) + wpabuf_len(buf);
+ wpabuf_put_buf(buf, nr->lci);
+ *msmt_token = lci;
+ }
+
+ if (civic && nr->civic) {
+ wpabuf_put_u8(buf, WLAN_EID_MEASURE_REPORT);
+ wpabuf_put_u8(buf, wpabuf_len(nr->civic));
+ /* overriding measurement token - the first byte of the
+ * measurement IE
+ */
+ msmt_token = wpabuf_mhead_u8(buf) + wpabuf_len(buf);
+ wpabuf_put_buf(buf, nr->civic);
+ *msmt_token = civic;
+ }
+ }
+
+ hostapd_drv_send_action(hapd, hapd->iface->freq, 0, addr,
+ wpabuf_head(buf), wpabuf_len(buf));
+ wpabuf_free(buf);
+}
+
+
+static void hostapd_handle_nei_report_req(struct hostapd_data *hapd,
+ const u8 *buf, size_t len)
+{
+ struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
+ const u8 *pos, *ie, *end;
+ struct wpa_ssid_value ssid = {
+ .ssid_len = 0
+ };
+ u8 token;
+ u8 lci = 0, civic = 0; /* Measurement tokens */
+ u16 lci_max_age = 0;
+
+ if (!(hapd->conf->radio_measurements[0] &
+ WLAN_RRM_CAPS_NEIGHBOR_REPORT))
+ return;
+
+ end = buf + len;
+
+ token = mgmt->u.action.u.rrm.dialog_token;
+ pos = mgmt->u.action.u.rrm.variable;
+ len = end - pos;
+
+ ie = get_ie(pos, len, WLAN_EID_SSID);
+ if (ie && ie[1] && ie[1] <= SSID_MAX_LEN) {
+ ssid.ssid_len = ie[1];
+ os_memcpy(ssid.ssid, ie + 2, ssid.ssid_len);
+ } else {
+ ssid.ssid_len = hapd->conf->ssid.ssid_len;
+ os_memcpy(ssid.ssid, hapd->conf->ssid.ssid, ssid.ssid_len);
+ }
+
+ while ((ie = get_ie(pos, len, WLAN_EID_MEASURE_REQUEST))) {
+ if (ie[1] < 3)
+ break;
+
+ wpa_printf(MSG_DEBUG,
+ "Neighbor report request, measure type %u",
+ ie[4]);
+
+ switch (ie[4]) { /* Measurement type */
+ case MEASURE_TYPE_LCI:
+ lci = ie[2]; /* Measurement token */
+ lci_max_age =
+ hostapd_parse_location_lci_req_age(ie + 2,
+ ie[1]);
+ break;
+ case MEASURE_TYPE_LOCATION_CIVIC:
+ civic = ie[2]; /* Measurement token */
+ break;
+ default:
+ break;
+ }
+
+ pos = ie + ie[1] + 2;
+ len = end - pos;
+ }
+
+ hostapd_send_nei_report_resp(hapd, mgmt->sa, token, &ssid, lci, civic,
+ lci_max_age);
+}
+
+
+void hostapd_handle_radio_measurement(struct hostapd_data *hapd,
+ const u8 *buf, size_t len)
+{
+ struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
+
+ /* check for enough bytes: header + (1B)category + (1B)action +
+ * (1B)dialog_token.
+ */
+ if (len < IEEE80211_HDRLEN + 3)
+ return;
+
+ wpa_printf(MSG_INFO, "Radio measurement frame, action %d",
+ mgmt->u.action.u.rrm.action);
+
+ switch (mgmt->u.action.u.rrm.action) {
+ case WLAN_RRM_NEIGHBOR_REPORT_REQUEST:
+ hostapd_handle_nei_report_req(hapd, buf, len);
+ break;
+ default:
+ wpa_printf(MSG_DEBUG, "RRM action %d is not supported",
+ mgmt->u.action.u.rrm.action);
+ }
+}
diff --git a/src/ap/rrm.h b/src/ap/rrm.h
new file mode 100644
index 0000000..3df49ab
--- /dev/null
+++ b/src/ap/rrm.h
@@ -0,0 +1,16 @@
+/*
+ * hostapd / Radio Measurement (RRM)
+ * Copyright(c) 2013 - 2016 Intel Mobile Communications GmbH.
+ * Copyright(c) 2011 - 2016 Intel Corporation. All rights reserved.
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#ifndef RRM_H
+#define RRM_H
+
+void hostapd_handle_radio_measurement(struct hostapd_data *hapd,
+ const u8 *buf, size_t len);
+
+#endif /* RRM_H */
diff --git a/src/common/ieee802_11_defs.h b/src/common/ieee802_11_defs.h
index 5b410bf..3a0ef21 100644
--- a/src/common/ieee802_11_defs.h
+++ b/src/common/ieee802_11_defs.h
@@ -674,12 +674,19 @@ struct ieee80211_mgmt {
u8 action;
u8 variable[];
} STRUCT_PACKED fst_action;
+ struct {
+ u8 action;
+ u8 dialog_token;
+ u8 variable[];
+ } STRUCT_PACKED rrm;
} u;
} STRUCT_PACKED action;
} u;
} STRUCT_PACKED;
+#define IEEE80211_MAX_MMPDU_SIZE 2304
+
/* Rx MCS bitmask is in the first 77 bits of supported_mcs_set */
#define IEEE80211_HT_MCS_MASK_LEN 10
diff --git a/wpa_supplicant/Android.mk b/wpa_supplicant/Android.mk
index d1adda5..0e08152 100644
--- a/wpa_supplicant/Android.mk
+++ b/wpa_supplicant/Android.mk
@@ -798,6 +798,7 @@ OBJS += src/ap/beacon.c
OBJS += src/ap/bss_load.c
OBJS += src/ap/eap_user_db.c
OBJS += src/ap/neighbor_db.c
+OBJS += src/ap/rrm.c
ifdef CONFIG_IEEE80211N
OBJS += src/ap/ieee802_11_ht.c
ifdef CONFIG_IEEE80211AC
diff --git a/wpa_supplicant/Makefile b/wpa_supplicant/Makefile
index 06c26d2..700c67a 100644
--- a/wpa_supplicant/Makefile
+++ b/wpa_supplicant/Makefile
@@ -845,6 +845,7 @@ OBJS += ../src/ap/beacon.o
OBJS += ../src/ap/bss_load.o
OBJS += ../src/ap/eap_user_db.o
OBJS += ../src/ap/neighbor_db.o
+OBJS += ../src/ap/rrm.o
ifdef CONFIG_IEEE80211N
OBJS += ../src/ap/ieee802_11_ht.o
ifdef CONFIG_IEEE80211AC
--
1.9.1
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