diff --git a/src/ap/ap_config.h b/src/ap/ap_config.h
index b4860a0..4631ca9 100644
--- a/src/ap/ap_config.h
+++ b/src/ap/ap_config.h
@@ -311,6 +311,7 @@
 
 	char *radius_server_clients;
 	int radius_server_auth_port;
+	int radius_server_acct_port;
 	int radius_server_ipv6;
 
 	char *test_socket; /* UNIX domain socket path for driver_test */
diff --git a/src/ap/ap_drv_ops.c b/src/ap/ap_drv_ops.c
index 893e6d9..e998fc6 100644
--- a/src/ap/ap_drv_ops.c
+++ b/src/ap/ap_drv_ops.c
@@ -346,7 +346,7 @@
 		    u16 listen_interval,
 		    const struct ieee80211_ht_capabilities *ht_capab,
 		    const struct ieee80211_vht_capabilities *vht_capab,
-		    u32 flags, u8 qosinfo)
+		    u32 flags, u8 qosinfo, u8 vht_opmode)
 {
 	struct hostapd_sta_add_params params;
 
@@ -364,6 +364,8 @@
 	params.listen_interval = listen_interval;
 	params.ht_capabilities = ht_capab;
 	params.vht_capabilities = vht_capab;
+	params.vht_opmode_enabled = !!(flags & WLAN_STA_VHT_OPMODE_ENABLED);
+	params.vht_opmode = vht_opmode;
 	params.flags = hostapd_sta_flags_to_drv(flags);
 	params.qosinfo = qosinfo;
 	return hapd->driver->sta_add(hapd->drv_priv, &params);
diff --git a/src/ap/ap_drv_ops.h b/src/ap/ap_drv_ops.h
index 15a4b26..9edaf7d 100644
--- a/src/ap/ap_drv_ops.h
+++ b/src/ap/ap_drv_ops.h
@@ -40,7 +40,7 @@
 		    u16 listen_interval,
 		    const struct ieee80211_ht_capabilities *ht_capab,
 		    const struct ieee80211_vht_capabilities *vht_capab,
-		    u32 flags, u8 qosinfo);
+		    u32 flags, u8 qosinfo, u8 vht_opmode);
 int hostapd_set_privacy(struct hostapd_data *hapd, int enabled);
 int hostapd_set_generic_elem(struct hostapd_data *hapd, const u8 *elem,
 			     size_t elem_len);
diff --git a/src/ap/authsrv.c b/src/ap/authsrv.c
index 8bb58a6..7183aba 100644
--- a/src/ap/authsrv.c
+++ b/src/ap/authsrv.c
@@ -92,6 +92,7 @@
 	os_memset(&srv, 0, sizeof(srv));
 	srv.client_file = conf->radius_server_clients;
 	srv.auth_port = conf->radius_server_auth_port;
+	srv.acct_port = conf->radius_server_acct_port;
 	srv.conf_ctx = hapd;
 	srv.eap_sim_db_priv = hapd->eap_sim_db_priv;
 	srv.ssl_ctx = hapd->ssl_ctx;
diff --git a/src/ap/ieee802_11.c b/src/ap/ieee802_11.c
index c755265..9251ac3 100644
--- a/src/ap/ieee802_11.c
+++ b/src/ap/ieee802_11.c
@@ -895,6 +895,11 @@
 				  elems.vht_capabilities_len);
 	if (resp != WLAN_STATUS_SUCCESS)
 		return resp;
+
+	resp = set_sta_vht_opmode(hapd, sta, elems.vht_opmode_notif);
+	if (resp != WLAN_STATUS_SUCCESS)
+		return resp;
+
 	if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht &&
 	    !(sta->flags & WLAN_STA_VHT)) {
 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
@@ -1937,7 +1942,7 @@
 			    sta->listen_interval,
 			    sta->flags & WLAN_STA_HT ? &ht_cap : NULL,
 			    sta->flags & WLAN_STA_VHT ? &vht_cap : NULL,
-			    sta->flags, sta->qosinfo)) {
+			    sta->flags, sta->qosinfo, sta->vht_opmode)) {
 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
 			       HOSTAPD_LEVEL_NOTICE,
 			       "Could not add STA to kernel driver");
diff --git a/src/ap/ieee802_11.h b/src/ap/ieee802_11.h
index 566a65a..809b4ca 100644
--- a/src/ap/ieee802_11.h
+++ b/src/ap/ieee802_11.h
@@ -61,6 +61,8 @@
 void update_ht_state(struct hostapd_data *hapd, struct sta_info *sta);
 u16 copy_sta_vht_capab(struct hostapd_data *hapd, struct sta_info *sta,
 		       const u8 *vht_capab, size_t vht_capab_len);
+u16 set_sta_vht_opmode(struct hostapd_data *hapd, struct sta_info *sta,
+		       const u8 *vht_opmode);
 void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr,
 		       const u8 *buf, size_t len, int ack);
 void hostapd_eapol_tx_status(struct hostapd_data *hapd, const u8 *dst,
diff --git a/src/ap/ieee802_11_vht.c b/src/ap/ieee802_11_vht.c
index f2ab182..221d9c2 100644
--- a/src/ap/ieee802_11_vht.c
+++ b/src/ap/ieee802_11_vht.c
@@ -108,6 +108,35 @@
 	return WLAN_STATUS_SUCCESS;
 }
 
+
+u16 set_sta_vht_opmode(struct hostapd_data *hapd, struct sta_info *sta,
+		       const u8 *vht_oper_notif)
+{
+	u8 channel_width;
+
+	if (!vht_oper_notif) {
+		sta->flags &= ~WLAN_STA_VHT_OPMODE_ENABLED;
+		return WLAN_STATUS_SUCCESS;
+	}
+
+	channel_width = *vht_oper_notif & VHT_OPMODE_CHANNEL_WIDTH_MASK;
+
+	if (channel_width != VHT_CHANWIDTH_USE_HT &&
+	    channel_width != VHT_CHANWIDTH_80MHZ &&
+	    channel_width != VHT_CHANWIDTH_160MHZ &&
+	    channel_width != VHT_CHANWIDTH_80P80MHZ &&
+	    ((*vht_oper_notif & VHT_OPMODE_CHANNEL_RxNSS_MASK) >>
+	     VHT_OPMODE_NOTIF_RX_NSS_SHIFT) > VHT_RX_NSS_MAX_STREAMS - 1) {
+		sta->flags &= ~WLAN_STA_VHT_OPMODE_ENABLED;
+		return WLAN_STATUS_UNSPECIFIED_FAILURE;
+	}
+
+	sta->flags |= WLAN_STA_VHT_OPMODE_ENABLED;
+	sta->vht_opmode = *vht_oper_notif;
+	return WLAN_STATUS_SUCCESS;
+}
+
+
 void hostapd_get_vht_capab(struct hostapd_data *hapd,
 			   struct ieee80211_vht_capabilities *vht_cap,
 			   struct ieee80211_vht_capabilities *neg_vht_cap)
diff --git a/src/ap/sta_info.h b/src/ap/sta_info.h
index 9b77e06..240b926 100644
--- a/src/ap/sta_info.h
+++ b/src/ap/sta_info.h
@@ -27,6 +27,7 @@
 #define WLAN_STA_GAS BIT(17)
 #define WLAN_STA_VHT BIT(18)
 #define WLAN_STA_WNM_SLEEP_MODE BIT(19)
+#define WLAN_STA_VHT_OPMODE_ENABLED BIT(20)
 #define WLAN_STA_PENDING_DISASSOC_CB BIT(29)
 #define WLAN_STA_PENDING_DEAUTH_CB BIT(30)
 #define WLAN_STA_NONERP BIT(31)
@@ -103,6 +104,7 @@
 
 	struct ieee80211_ht_capabilities *ht_capabilities;
 	struct ieee80211_vht_capabilities *vht_capabilities;
+	u8 vht_opmode;
 
 #ifdef CONFIG_IEEE80211W
 	int sa_query_count; /* number of pending SA Query requests;
diff --git a/src/common/ieee802_11_common.c b/src/common/ieee802_11_common.c
index 809089f..50bdc01 100644
--- a/src/common/ieee802_11_common.c
+++ b/src/common/ieee802_11_common.c
@@ -252,6 +252,11 @@
 			elems->vht_operation = pos;
 			elems->vht_operation_len = elen;
 			break;
+		case WLAN_EID_VHT_OPERATING_MODE_NOTIFICATION:
+			if (elen != 1)
+				break;
+			elems->vht_opmode_notif = pos;
+			break;
 		case WLAN_EID_LINK_ID:
 			if (elen < 18)
 				break;
diff --git a/src/common/ieee802_11_common.h b/src/common/ieee802_11_common.h
index b84dd9e..4fb2e84 100644
--- a/src/common/ieee802_11_common.h
+++ b/src/common/ieee802_11_common.h
@@ -30,6 +30,7 @@
 	const u8 *ht_operation;
 	const u8 *vht_capabilities;
 	const u8 *vht_operation;
+	const u8 *vht_opmode_notif;
 	const u8 *vendor_ht_cap;
 	const u8 *p2p;
 	const u8 *wfd;
diff --git a/src/common/ieee802_11_defs.h b/src/common/ieee802_11_defs.h
index 6f7f777..0e39caf 100644
--- a/src/common/ieee802_11_defs.h
+++ b/src/common/ieee802_11_defs.h
@@ -764,6 +764,13 @@
 #define VHT_CAP_RX_ANTENNA_PATTERN                  ((u32) BIT(28))
 #define VHT_CAP_TX_ANTENNA_PATTERN                  ((u32) BIT(29))
 
+#define VHT_OPMODE_CHANNEL_WIDTH_MASK		    ((u8) BIT(0) | BIT(1))
+#define VHT_OPMODE_CHANNEL_RxNSS_MASK		    ((u8) BIT(4) | BIT(5) | \
+						     BIT(6))
+#define VHT_OPMODE_NOTIF_RX_NSS_SHIFT		    4
+
+#define VHT_RX_NSS_MAX_STREAMS			    8
+
 /* VHT channel widths */
 #define VHT_CHANWIDTH_USE_HT	0
 #define VHT_CHANWIDTH_80MHZ	1
diff --git a/src/crypto/crypto.h b/src/crypto/crypto.h
index 9bccaaa..4caa277 100644
--- a/src/crypto/crypto.h
+++ b/src/crypto/crypto.h
@@ -534,16 +534,6 @@
 			  struct crypto_bignum *d);
 
 /**
- * crypto_bignum_rshift - b = a >> n
- * @a: Bignum
- * @n: Number of bits to shift
- * @b: Bignum; used to store the result of a >> n
- * Returns: 0 on success, -1 on failure
- */
-int crypto_bignum_rshift(const struct crypto_bignum *a, int n,
-			 struct crypto_bignum *b);
-
-/**
  * crypto_bignum_inverse - Inverse a bignum so that a * c = 1 (mod b)
  * @a: Bignum
  * @b: Bignum
diff --git a/src/crypto/crypto_openssl.c b/src/crypto/crypto_openssl.c
index 1da2b9f..817ee2d 100644
--- a/src/crypto/crypto_openssl.c
+++ b/src/crypto/crypto_openssl.c
@@ -916,13 +916,6 @@
 }
 
 
-int crypto_bignum_rshift(const struct crypto_bignum *a, int n,
-			 struct crypto_bignum *b)
-{
-	return BN_rshift((BIGNUM *) b, (const BIGNUM *) a, n) ? 0 : -1;
-}
-
-
 int crypto_bignum_inverse(const struct crypto_bignum *a,
 			  const struct crypto_bignum *b,
 			  struct crypto_bignum *c)
diff --git a/src/crypto/ms_funcs.c b/src/crypto/ms_funcs.c
index b2bbab2..49a5c1c 100644
--- a/src/crypto/ms_funcs.c
+++ b/src/crypto/ms_funcs.c
@@ -58,6 +58,7 @@
 				WPA_PUT_LE16(ucs2_buffer + j,
 					     ((c & 0xF) << 12) |
 					     ((c2 & 0x3F) << 6) | (c3 & 0x3F));
+				j += 2;
 			}
 		}
 	}
diff --git a/src/drivers/driver.h b/src/drivers/driver.h
index d4136d7..632ae3a 100644
--- a/src/drivers/driver.h
+++ b/src/drivers/driver.h
@@ -1028,6 +1028,8 @@
 	u16 listen_interval;
 	const struct ieee80211_ht_capabilities *ht_capabilities;
 	const struct ieee80211_vht_capabilities *vht_capabilities;
+	int vht_opmode_enabled;
+	u8 vht_opmode;
 	u32 flags; /* bitmask of WPA_STA_* flags */
 	int set; /* Set STA parameters instead of add */
 	u8 qosinfo;
diff --git a/src/drivers/driver_nl80211.c b/src/drivers/driver_nl80211.c
index f4bb31c..32a371d 100644
--- a/src/drivers/driver_nl80211.c
+++ b/src/drivers/driver_nl80211.c
@@ -6723,7 +6723,8 @@
 		nl80211_cmd(drv, msg, 0, NL80211_CMD_GET_WIPHY);
 
 	NLA_PUT_FLAG(msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
-	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
+	if (nl80211_set_iface_id(msg, bss) < 0)
+		goto nla_put_failure;
 
 	if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0) {
 		nl80211_set_regulatory_flags(drv, &result);
@@ -7351,6 +7352,12 @@
 			params->vht_capabilities);
 	}
 
+	if (params->vht_opmode_enabled) {
+		wpa_printf(MSG_DEBUG, "  * opmode=%u", params->vht_opmode);
+		NLA_PUT_U8(msg, NL80211_ATTR_OPMODE_NOTIF,
+			   params->vht_opmode);
+	}
+
 	wpa_printf(MSG_DEBUG, "  * capability=0x%x", params->capability);
 	NLA_PUT_U16(msg, NL80211_ATTR_STA_CAPABILITY, params->capability);
 
diff --git a/src/eap_server/eap_sim_db.c b/src/eap_server/eap_sim_db.c
index 45660ed..bc2cbe5 100644
--- a/src/eap_server/eap_sim_db.c
+++ b/src/eap_server/eap_sim_db.c
@@ -639,6 +639,11 @@
 		    "/tmp/eap_sim_db_%d-%d", getpid(), counter++);
 	os_free(data->local_sock);
 	data->local_sock = os_strdup(addr.sun_path);
+	if (data->local_sock == NULL) {
+		close(data->sock);
+		data->sock = -1;
+		return -1;
+	}
 	if (bind(data->sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
 		wpa_printf(MSG_INFO, "bind(eap_sim_db): %s", strerror(errno));
 		close(data->sock);
@@ -657,6 +662,9 @@
 				  os_strlen(addr.sun_path));
 		close(data->sock);
 		data->sock = -1;
+		unlink(data->local_sock);
+		os_free(data->local_sock);
+		data->local_sock = NULL;
 		return -1;
 	}
 
diff --git a/src/radius/radius.c b/src/radius/radius.c
index 494f92d..1070fc7 100644
--- a/src/radius/radius.c
+++ b/src/radius/radius.c
@@ -1,6 +1,6 @@
 /*
  * RADIUS message processing
- * Copyright (c) 2002-2009, 2011-2012, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2002-2009, 2011-2014, Jouni Malinen <j@w1.fi>
  *
  * This software may be distributed under the terms of the BSD license.
  * See README for more details.
@@ -249,25 +249,17 @@
 }
 
 
-static void print_char(char c)
-{
-	if (c >= 32 && c < 127)
-		printf("%c", c);
-	else
-		printf("<%02x>", c);
-}
-
-
 static void radius_msg_dump_attr(struct radius_attr_hdr *hdr)
 {
 	struct radius_attr_type *attr;
-	int i, len;
+	int len;
 	unsigned char *pos;
+	char buf[1000];
 
 	attr = radius_get_attr_type(hdr->type);
 
-	printf("   Attribute %d (%s) length=%d\n",
-	       hdr->type, attr ? attr->name : "?Unknown?", hdr->length);
+	wpa_printf(MSG_INFO, "   Attribute %d (%s) length=%d",
+		   hdr->type, attr ? attr->name : "?Unknown?", hdr->length);
 
 	if (attr == NULL || hdr->length < sizeof(struct radius_attr_hdr))
 		return;
@@ -277,47 +269,50 @@
 
 	switch (attr->data_type) {
 	case RADIUS_ATTR_TEXT:
-		printf("      Value: '");
-		for (i = 0; i < len; i++)
-			print_char(pos[i]);
-		printf("'\n");
+		printf_encode(buf, sizeof(buf), pos, len);
+		wpa_printf(MSG_INFO, "      Value: '%s'", buf);
 		break;
 
 	case RADIUS_ATTR_IP:
 		if (len == 4) {
 			struct in_addr addr;
 			os_memcpy(&addr, pos, 4);
-			printf("      Value: %s\n", inet_ntoa(addr));
-		} else
-			printf("      Invalid IP address length %d\n", len);
+			wpa_printf(MSG_INFO, "      Value: %s",
+				   inet_ntoa(addr));
+		} else {
+			wpa_printf(MSG_INFO, "      Invalid IP address length %d",
+				   len);
+		}
 		break;
 
 #ifdef CONFIG_IPV6
 	case RADIUS_ATTR_IPV6:
 		if (len == 16) {
-			char buf[128];
 			const char *atxt;
 			struct in6_addr *addr = (struct in6_addr *) pos;
 			atxt = inet_ntop(AF_INET6, addr, buf, sizeof(buf));
-			printf("      Value: %s\n", atxt ? atxt : "?");
-		} else
-			printf("      Invalid IPv6 address length %d\n", len);
+			wpa_printf(MSG_INFO, "      Value: %s",
+				   atxt ? atxt : "?");
+		} else {
+			wpa_printf(MSG_INFO, "      Invalid IPv6 address length %d",
+				   len);
+		}
 		break;
 #endif /* CONFIG_IPV6 */
 
 	case RADIUS_ATTR_HEXDUMP:
 	case RADIUS_ATTR_UNDIST:
-		printf("      Value:");
-		for (i = 0; i < len; i++)
-			printf(" %02x", pos[i]);
-		printf("\n");
+		wpa_snprintf_hex(buf, sizeof(buf), pos, len);
+		wpa_printf(MSG_INFO, "      Value: %s", buf);
 		break;
 
 	case RADIUS_ATTR_INT32:
 		if (len == 4)
-			printf("      Value: %u\n", WPA_GET_BE32(pos));
+			wpa_printf(MSG_INFO, "      Value: %u",
+				   WPA_GET_BE32(pos));
 		else
-			printf("      Invalid INT32 length %d\n", len);
+			wpa_printf(MSG_INFO, "      Invalid INT32 length %d",
+				   len);
 		break;
 
 	default:
@@ -330,9 +325,9 @@
 {
 	size_t i;
 
-	printf("RADIUS message: code=%d (%s) identifier=%d length=%d\n",
-	       msg->hdr->code, radius_code_string(msg->hdr->code),
-	       msg->hdr->identifier, be_to_host16(msg->hdr->length));
+	wpa_printf(MSG_INFO, "RADIUS message: code=%d (%s) identifier=%d length=%d",
+		   msg->hdr->code, radius_code_string(msg->hdr->code),
+		   msg->hdr->identifier, be_to_host16(msg->hdr->length));
 
 	for (i = 0; i < msg->attr_used; i++) {
 		struct radius_attr_hdr *attr = radius_get_attr_hdr(msg, i);
@@ -384,7 +379,7 @@
 	attr = radius_msg_add_attr(msg, RADIUS_ATTR_MESSAGE_AUTHENTICATOR,
 				   auth, MD5_MAC_LEN);
 	if (attr == NULL) {
-		printf("WARNING: Could not add Message-Authenticator\n");
+		wpa_printf(MSG_ERROR, "WARNING: Could not add Message-Authenticator");
 		return -1;
 	}
 	msg->hdr->length = host_to_be16(wpabuf_len(msg->buf));
@@ -473,6 +468,27 @@
 }
 
 
+void radius_msg_finish_acct_resp(struct radius_msg *msg, const u8 *secret,
+				 size_t secret_len, const u8 *req_authenticator)
+{
+	const u8 *addr[2];
+	size_t len[2];
+
+	msg->hdr->length = host_to_be16(wpabuf_len(msg->buf));
+	os_memcpy(msg->hdr->authenticator, req_authenticator, MD5_MAC_LEN);
+	addr[0] = wpabuf_head(msg->buf);
+	len[0] = wpabuf_len(msg->buf);
+	addr[1] = secret;
+	len[1] = secret_len;
+	md5_vector(2, addr, len, msg->hdr->authenticator);
+
+	if (wpabuf_len(msg->buf) > 0xffff) {
+		wpa_printf(MSG_WARNING, "RADIUS: Too long messages (%lu)",
+			   (unsigned long) wpabuf_len(msg->buf));
+	}
+}
+
+
 int radius_msg_verify_acct_req(struct radius_msg *msg, const u8 *secret,
 			       size_t secret_len)
 {
@@ -585,7 +601,7 @@
 	struct radius_attr_hdr *attr;
 
 	if (data_len > RADIUS_MAX_ATTR_LEN) {
-		printf("radius_msg_add_attr: too long attribute (%lu bytes)\n",
+		wpa_printf(MSG_ERROR, "radius_msg_add_attr: too long attribute (%lu bytes)",
 		       (unsigned long) data_len);
 		return NULL;
 	}
@@ -756,8 +772,7 @@
 		tmp = radius_get_attr_hdr(msg, i);
 		if (tmp->type == RADIUS_ATTR_MESSAGE_AUTHENTICATOR) {
 			if (attr != NULL) {
-				printf("Multiple Message-Authenticator "
-				       "attributes in RADIUS message\n");
+				wpa_printf(MSG_INFO, "Multiple Message-Authenticator attributes in RADIUS message");
 				return 1;
 			}
 			attr = tmp;
@@ -765,7 +780,7 @@
 	}
 
 	if (attr == NULL) {
-		printf("No Message-Authenticator attribute found\n");
+		wpa_printf(MSG_INFO, "No Message-Authenticator attribute found");
 		return 1;
 	}
 
@@ -786,7 +801,7 @@
 	}
 
 	if (os_memcmp(orig, auth, MD5_MAC_LEN) != 0) {
-		printf("Invalid Message-Authenticator!\n");
+		wpa_printf(MSG_INFO, "Invalid Message-Authenticator!");
 		return 1;
 	}
 
@@ -802,7 +817,7 @@
 	u8 hash[MD5_MAC_LEN];
 
 	if (sent_msg == NULL) {
-		printf("No matching Access-Request message found\n");
+		wpa_printf(MSG_INFO, "No matching Access-Request message found");
 		return 1;
 	}
 
@@ -823,7 +838,7 @@
 	len[3] = secret_len;
 	md5_vector(4, addr, len, hash);
 	if (os_memcmp(hash, msg->hdr->authenticator, MD5_MAC_LEN) != 0) {
-		printf("Response Authenticator invalid!\n");
+		wpa_printf(MSG_INFO, "Response Authenticator invalid!");
 		return 1;
 	}
 
@@ -962,7 +977,8 @@
 	pos = key + 2;
 	left = len - 2;
 	if (left % 16) {
-		printf("Invalid ms key len %lu\n", (unsigned long) left);
+		wpa_printf(MSG_INFO, "Invalid ms key len %lu",
+			   (unsigned long) left);
 		return NULL;
 	}
 
@@ -996,7 +1012,7 @@
 	}
 
 	if (plain[0] == 0 || plain[0] > plen - 1) {
-		printf("Failed to decrypt MPPE key\n");
+		wpa_printf(MSG_INFO, "Failed to decrypt MPPE key");
 		os_free(plain);
 		return NULL;
 	}
diff --git a/src/radius/radius.h b/src/radius/radius.h
index 2031054..ad65b04 100644
--- a/src/radius/radius.h
+++ b/src/radius/radius.h
@@ -1,6 +1,6 @@
 /*
  * RADIUS message processing
- * Copyright (c) 2002-2009, 2012, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2002-2009, 2012, 2014, Jouni Malinen <j@w1.fi>
  *
  * This software may be distributed under the terms of the BSD license.
  * See README for more details.
@@ -204,6 +204,9 @@
 			       const struct radius_hdr *req_hdr);
 void radius_msg_finish_acct(struct radius_msg *msg, const u8 *secret,
 			    size_t secret_len);
+void radius_msg_finish_acct_resp(struct radius_msg *msg, const u8 *secret,
+				 size_t secret_len,
+				 const u8 *req_authenticator);
 int radius_msg_verify_acct_req(struct radius_msg *msg, const u8 *secret,
 			       size_t secret_len);
 int radius_msg_verify_das_req(struct radius_msg *msg, const u8 *secret,
diff --git a/src/radius/radius_server.c b/src/radius/radius_server.c
index 1063d65..2904b2f 100644
--- a/src/radius/radius_server.c
+++ b/src/radius/radius_server.c
@@ -1,6 +1,6 @@
 /*
  * RADIUS authentication server
- * Copyright (c) 2005-2009, 2011, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2005-2009, 2011-2014, Jouni Malinen <j@w1.fi>
  *
  * This software may be distributed under the terms of the BSD license.
  * See README for more details.
@@ -49,6 +49,13 @@
 	u32 bad_authenticators;
 	u32 packets_dropped;
 	u32 unknown_types;
+
+	u32 acct_requests;
+	u32 invalid_acct_requests;
+	u32 acct_responses;
+	u32 malformed_acct_requests;
+	u32 acct_bad_authenticators;
+	u32 unknown_acct_types;
 };
 
 /**
@@ -99,6 +106,11 @@
 	int auth_sock;
 
 	/**
+	 * acct_sock - Socket for RADIUS accounting messages
+	 */
+	int acct_sock;
+
+	/**
 	 * clients - List of authorized RADIUS clients
 	 */
 	struct radius_client *clients;
@@ -979,6 +991,140 @@
 }
 
 
+static void radius_server_receive_acct(int sock, void *eloop_ctx,
+				       void *sock_ctx)
+{
+	struct radius_server_data *data = eloop_ctx;
+	u8 *buf = NULL;
+	union {
+		struct sockaddr_storage ss;
+		struct sockaddr_in sin;
+#ifdef CONFIG_IPV6
+		struct sockaddr_in6 sin6;
+#endif /* CONFIG_IPV6 */
+	} from;
+	socklen_t fromlen;
+	int len, res;
+	struct radius_client *client = NULL;
+	struct radius_msg *msg = NULL, *resp = NULL;
+	char abuf[50];
+	int from_port = 0;
+	struct radius_hdr *hdr;
+	struct wpabuf *rbuf;
+
+	buf = os_malloc(RADIUS_MAX_MSG_LEN);
+	if (buf == NULL) {
+		goto fail;
+	}
+
+	fromlen = sizeof(from);
+	len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0,
+		       (struct sockaddr *) &from.ss, &fromlen);
+	if (len < 0) {
+		wpa_printf(MSG_INFO, "recvfrom[radius_server]: %s",
+			   strerror(errno));
+		goto fail;
+	}
+
+#ifdef CONFIG_IPV6
+	if (data->ipv6) {
+		if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf,
+			      sizeof(abuf)) == NULL)
+			abuf[0] = '\0';
+		from_port = ntohs(from.sin6.sin6_port);
+		RADIUS_DEBUG("Received %d bytes from %s:%d",
+			     len, abuf, from_port);
+
+		client = radius_server_get_client(data,
+						  (struct in_addr *)
+						  &from.sin6.sin6_addr, 1);
+	}
+#endif /* CONFIG_IPV6 */
+
+	if (!data->ipv6) {
+		os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf));
+		from_port = ntohs(from.sin.sin_port);
+		RADIUS_DEBUG("Received %d bytes from %s:%d",
+			     len, abuf, from_port);
+
+		client = radius_server_get_client(data, &from.sin.sin_addr, 0);
+	}
+
+	RADIUS_DUMP("Received data", buf, len);
+
+	if (client == NULL) {
+		RADIUS_DEBUG("Unknown client %s - packet ignored", abuf);
+		data->counters.invalid_acct_requests++;
+		goto fail;
+	}
+
+	msg = radius_msg_parse(buf, len);
+	if (msg == NULL) {
+		RADIUS_DEBUG("Parsing incoming RADIUS frame failed");
+		data->counters.malformed_acct_requests++;
+		client->counters.malformed_acct_requests++;
+		goto fail;
+	}
+
+	os_free(buf);
+	buf = NULL;
+
+	if (wpa_debug_level <= MSG_MSGDUMP) {
+		radius_msg_dump(msg);
+	}
+
+	if (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCOUNTING_REQUEST) {
+		RADIUS_DEBUG("Unexpected RADIUS code %d",
+			     radius_msg_get_hdr(msg)->code);
+		data->counters.unknown_acct_types++;
+		client->counters.unknown_acct_types++;
+		goto fail;
+	}
+
+	data->counters.acct_requests++;
+	client->counters.acct_requests++;
+
+	if (radius_msg_verify_acct_req(msg, (u8 *) client->shared_secret,
+				       client->shared_secret_len)) {
+		RADIUS_DEBUG("Invalid Authenticator from %s", abuf);
+		data->counters.acct_bad_authenticators++;
+		client->counters.acct_bad_authenticators++;
+		goto fail;
+	}
+
+	/* TODO: Write accounting information to a file or database */
+
+	hdr = radius_msg_get_hdr(msg);
+
+	resp = radius_msg_new(RADIUS_CODE_ACCOUNTING_RESPONSE, hdr->identifier);
+	if (resp == NULL)
+		goto fail;
+
+	radius_msg_finish_acct_resp(resp, (u8 *) client->shared_secret,
+				    client->shared_secret_len,
+				    hdr->authenticator);
+
+	RADIUS_DEBUG("Reply to %s:%d", abuf, from_port);
+	if (wpa_debug_level <= MSG_MSGDUMP) {
+		radius_msg_dump(resp);
+	}
+	rbuf = radius_msg_get_buf(resp);
+	data->counters.acct_responses++;
+	client->counters.acct_responses++;
+	res = sendto(data->acct_sock, wpabuf_head(rbuf), wpabuf_len(rbuf), 0,
+		     (struct sockaddr *) &from.ss, fromlen);
+	if (res < 0) {
+		wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s",
+			   strerror(errno));
+	}
+
+fail:
+	radius_msg_free(resp);
+	radius_msg_free(msg);
+	os_free(buf);
+}
+
+
 static int radius_server_disable_pmtu_discovery(int s)
 {
 	int r = -1;
@@ -1329,6 +1475,29 @@
 		return NULL;
 	}
 
+	if (conf->acct_port) {
+#ifdef CONFIG_IPV6
+		if (conf->ipv6)
+			data->acct_sock = radius_server_open_socket6(
+				conf->acct_port);
+		else
+#endif /* CONFIG_IPV6 */
+		data->acct_sock = radius_server_open_socket(conf->acct_port);
+		if (data->acct_sock < 0) {
+			wpa_printf(MSG_ERROR, "Failed to open UDP socket for RADIUS accounting server");
+			radius_server_deinit(data);
+			return NULL;
+		}
+		if (eloop_register_read_sock(data->acct_sock,
+					     radius_server_receive_acct,
+					     data, NULL)) {
+			radius_server_deinit(data);
+			return NULL;
+		}
+	} else {
+		data->acct_sock = -1;
+	}
+
 	return data;
 }
 
@@ -1347,6 +1516,11 @@
 		close(data->auth_sock);
 	}
 
+	if (data->acct_sock >= 0) {
+		eloop_unregister_read_sock(data->acct_sock);
+		close(data->acct_sock);
+	}
+
 	radius_server_free_clients(data, data->clients);
 
 	os_free(data->pac_opaque_encr_key);
@@ -1410,7 +1584,13 @@
 			  "radiusAuthServTotalMalformedAccessRequests=%u\n"
 			  "radiusAuthServTotalBadAuthenticators=%u\n"
 			  "radiusAuthServTotalPacketsDropped=%u\n"
-			  "radiusAuthServTotalUnknownTypes=%u\n",
+			  "radiusAuthServTotalUnknownTypes=%u\n"
+			  "radiusAccServTotalRequests=%u\n"
+			  "radiusAccServTotalInvalidRequests=%u\n"
+			  "radiusAccServTotalResponses=%u\n"
+			  "radiusAccServTotalMalformedRequests=%u\n"
+			  "radiusAccServTotalBadAuthenticators=%u\n"
+			  "radiusAccServTotalUnknownTypes=%u\n",
 			  data->counters.access_requests,
 			  data->counters.invalid_requests,
 			  data->counters.dup_access_requests,
@@ -1420,7 +1600,13 @@
 			  data->counters.malformed_access_requests,
 			  data->counters.bad_authenticators,
 			  data->counters.packets_dropped,
-			  data->counters.unknown_types);
+			  data->counters.unknown_types,
+			  data->counters.acct_requests,
+			  data->counters.invalid_acct_requests,
+			  data->counters.acct_responses,
+			  data->counters.malformed_acct_requests,
+			  data->counters.acct_bad_authenticators,
+			  data->counters.unknown_acct_types);
 	if (ret < 0 || ret >= end - pos) {
 		*pos = '\0';
 		return pos - buf;
@@ -1455,7 +1641,13 @@
 				  "radiusAuthServMalformedAccessRequests=%u\n"
 				  "radiusAuthServBadAuthenticators=%u\n"
 				  "radiusAuthServPacketsDropped=%u\n"
-				  "radiusAuthServUnknownTypes=%u\n",
+				  "radiusAuthServUnknownTypes=%u\n"
+				  "radiusAccServTotalRequests=%u\n"
+				  "radiusAccServTotalInvalidRequests=%u\n"
+				  "radiusAccServTotalResponses=%u\n"
+				  "radiusAccServTotalMalformedRequests=%u\n"
+				  "radiusAccServTotalBadAuthenticators=%u\n"
+				  "radiusAccServTotalUnknownTypes=%u\n",
 				  idx,
 				  abuf, mbuf,
 				  cli->counters.access_requests,
@@ -1466,7 +1658,13 @@
 				  cli->counters.malformed_access_requests,
 				  cli->counters.bad_authenticators,
 				  cli->counters.packets_dropped,
-				  cli->counters.unknown_types);
+				  cli->counters.unknown_types,
+				  cli->counters.acct_requests,
+				  cli->counters.invalid_acct_requests,
+				  cli->counters.acct_responses,
+				  cli->counters.malformed_acct_requests,
+				  cli->counters.acct_bad_authenticators,
+				  cli->counters.unknown_acct_types);
 		if (ret < 0 || ret >= end - pos) {
 			*pos = '\0';
 			return pos - buf;
diff --git a/src/radius/radius_server.h b/src/radius/radius_server.h
index 284bd59..78f5fc2 100644
--- a/src/radius/radius_server.h
+++ b/src/radius/radius_server.h
@@ -22,6 +22,11 @@
 	int auth_port;
 
 	/**
+	 * acct_port - UDP port to listen to as an accounting server
+	 */
+	int acct_port;
+
+	/**
 	 * client_file - RADIUS client configuration file
 	 *
 	 * This file contains the RADIUS clients and the shared secret to be