nl80211: Fix determining phy name for P2P Device

The phy name was determined using /sys/class/net/<ifname> but the P2P
Device is not listed there since it does not have an associated net
device. This patch changes name determination to obtain the name from
the wiphy information provide by nl80211.

Signed-hostap: Arend van Spriel <arend@broadcom.com>

src/drivers/driver_nl80211.c

@@ -3114,6 +3114,10 @@ static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 		  genlmsg_attrlen(gnlh, 0), NULL);
 
+	if (tb[NL80211_ATTR_WIPHY_NAME])
+		os_strncpy(drv->phyname,
+			   nla_get_string(tb[NL80211_ATTR_WIPHY_NAME]),
+			   sizeof(drv->phyname));
 	if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 		capa->max_scan_ssids =
 			nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
@@ -3475,39 +3479,6 @@ static void wpa_driver_nl80211_rfkill_unblocked(void *ctx)
 }
 
 
-static void nl80211_get_phy_name(struct wpa_driver_nl80211_data *drv)
-{
-	/* Find phy (radio) to which this interface belongs */
-	char buf[90], *pos;
-	int f, rv;
-
-	drv->phyname[0] = '\0';
-	snprintf(buf, sizeof(buf) - 1, "/sys/class/net/%s/phy80211/name",
-		 drv->first_bss.ifname);
-	f = open(buf, O_RDONLY);
-	if (f < 0) {
-		wpa_printf(MSG_DEBUG, "Could not open file %s: %s",
-			   buf, strerror(errno));
-		return;
-	}
-
-	rv = read(f, drv->phyname, sizeof(drv->phyname) - 1);
-	close(f);
-	if (rv < 0) {
-		wpa_printf(MSG_DEBUG, "Could not read file %s: %s",
-			   buf, strerror(errno));
-		return;
-	}
-
-	drv->phyname[rv] = '\0';
-	pos = os_strchr(drv->phyname, '\n');
-	if (pos)
-		*pos = '\0';
-	wpa_printf(MSG_DEBUG, "nl80211: interface %s in phy %s",
-		   drv->first_bss.ifname, drv->phyname);
-}
-
-
 static void wpa_driver_nl80211_handle_eapol_tx_status(int sock,
 						      void *eloop_ctx,
 						      void *handle)
@@ -3629,8 +3600,6 @@ static void * wpa_driver_nl80211_init(void *ctx, const char *ifname,
 	if (nl80211_init_bss(bss))
 		goto failed;
 
-	nl80211_get_phy_name(drv);
-
 	rcfg = os_zalloc(sizeof(*rcfg));
 	if (rcfg == NULL)
 		goto failed;
@@ -4033,6 +4002,9 @@ wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
 	if (wpa_driver_nl80211_capa(drv))
 		return -1;
 
+	wpa_printf(MSG_DEBUG, "nl80211: interface %s in phy %s",
+		   bss->ifname, drv->phyname);
+
 #ifndef HOSTAPD
 	if (dynamic_if)
 		nlmode = nl80211_get_ifmode(bss);