hostapd: ubus: allow to retrieve AP list

This adds the ability to retrieve hostapds internal list of APs seen on
the same operating channel via ubus.

External deamons can this way acquire information about the neighbor
situation without tracking own state or doing a full WiFi scan.

Signed-off-by: David Bauer <mail@david-bauer.net>

diff --git a/package/network/services/hostapd/src/src/ap/ubus.c b/package/network/services/hostapd/src/src/ap/ubus.c
index 5a5dd1a8898e6f86da50be4cca9ccc9d14669e0f..698a348e04d94f831b6194606dd966a760804363 100644 (file)
--- a/package/network/services/hostapd/src/src/ap/ubus.c
+++ b/package/network/services/hostapd/src/src/ap/ubus.c
@@ -14,6 +14,7 @@
 #include "hostapd.h"
 #include "neighbor_db.h"
 #include "wps_hostapd.h"
+#include "ap_list.h"
 #include "sta_info.h"
 #include "ubus.h"
 #include "ap_drv_ops.h"
@@ -1045,6 +1046,54 @@ hostapd_rrm_beacon_req(struct ubus_context *ctx, struct ubus_object *obj,
        return 0;
 }
 
+static int
+hostapd_ap_list(struct ubus_context *ctx, struct ubus_object *obj,
+               struct ubus_request_data *req, const char *method,
+               struct blob_attr *msg)
+{
+       struct hostapd_data *hapd = get_hapd_from_object(obj);
+       struct hostapd_iface *iface = hapd->iface;
+       struct os_reltime now;
+       struct ap_info *ap;
+       char mac_buf[20];
+       void *list, *c;
+
+       os_get_reltime(&now);
+       blob_buf_init(&b, 0);
+
+       list = blobmsg_open_table(&b, "aps");
+       for (ap = iface->ap_list; ap; ap = ap->next) {
+               struct os_reltime age;
+               int rate;
+               void *r;
+               int i;
+
+               os_reltime_sub(&now, &ap->last_beacon, &age);
+               sprintf(mac_buf, MACSTR, MAC2STR(ap->addr));
+
+               c = blobmsg_open_table(&b, mac_buf);
+               r = blobmsg_open_array(&b, "supported_rates");
+               for (i = 0; i < WLAN_SUPP_RATES_MAX; i++) {
+                       if (ap->supported_rates[i] == 0)
+                               continue;
+                       
+                       rate = (ap->supported_rates[i] & 0x7f) * 0.5;
+                       blobmsg_add_u32(&b, "", rate);
+               }
+               blobmsg_close_array(&b, r);
+
+               blobmsg_add_u32(&b, "erp", ap->erp);
+               blobmsg_add_u32(&b, "age", age.sec);
+               blobmsg_add_u32(&b, "channel", ap->channel);
+               blobmsg_add_u32(&b, "ht_support", ap->ht_support);
+               blobmsg_close_table(&b, c);
+       }
+       blobmsg_close_table(&b, list);
+       ubus_send_reply(ctx, req, b.head);
+
+       return 0;
+}
+
 
 #ifdef CONFIG_WNM_AP
 enum {
@@ -1166,6 +1215,7 @@ static const struct ubus_method bss_methods[] = {
        UBUS_METHOD_NOARG("rrm_nr_list", hostapd_rrm_nr_list),
        UBUS_METHOD("rrm_nr_set", hostapd_rrm_nr_set, nr_set_policy),
        UBUS_METHOD("rrm_beacon_req", hostapd_rrm_beacon_req, beacon_req_policy),
+       UBUS_METHOD_NOARG("ap_list", hostapd_ap_list),
 #ifdef CONFIG_WNM_AP
        UBUS_METHOD("wnm_disassoc_imminent", hostapd_wnm_disassoc_imminent, wnm_disassoc_policy),
 #endif