add libiwinfo (moved from LuCI trunk)

SVN-Revision: 29403

1 files changed, 1630 insertions, 0 deletions

diff --git a/package/iwinfo/src/iwinfo_nl80211.c b/package/iwinfo/src/iwinfo_nl80211.c
new file mode 100644
index 0000000000..b3da8384e7
--- /dev/null
+++ b/package/iwinfo/src/iwinfo_nl80211.c
@@ -0,0 +1,1630 @@
+/*
+ * iwinfo - Wireless Information Library - NL80211 Backend
+ *
+ *   Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
+ *
+ * The iwinfo library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * The iwinfo library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with the iwinfo library. If not, see http://www.gnu.org/licenses/.
+ *
+ * The signal handling code is derived from the official madwifi tools,
+ * wlanconfig.c in particular. The encryption property handling was
+ * inspired by the hostapd madwifi driver.
+ *
+ * Parts of this code are derived from the Linux iw utility.
+ */
+
+#include "iwinfo/nl80211.h"
+#include "iwinfo/wext.h"
+
+#define min(x, y) ((x) < (y)) ? (x) : (y)
+
+static struct nl80211_state *nls = NULL;
+
+static int nl80211_init(void)
+{
+	int err, fd;
+
+	if (!nls)
+	{
+		nls = malloc(sizeof(struct nl80211_state));
+		if (!nls) {
+			err = -ENOMEM;
+			goto err;
+		}
+
+		nls->nl_sock = nl_socket_alloc();
+		if (!nls->nl_sock) {
+			err = -ENOMEM;
+			goto err;
+		}
+
+		if( genl_connect(nls->nl_sock)) {
+			err = -ENOLINK;
+			goto err;
+		}
+
+		fd = nl_socket_get_fd(nls->nl_sock);
+		if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0)
+		{
+			err = -EINVAL;
+			goto err;
+		}
+
+		if( genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
+			err = -ENOMEM;
+			goto err;
+		}
+
+		nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
+		if (!nls->nl80211)
+		{
+			err = -ENOENT;
+			goto err;
+		}
+	}
+
+	return 0;
+
+
+err:
+	nl80211_close();
+	return err;
+}
+
+static int nl80211_msg_error(struct sockaddr_nl *nla,
+	struct nlmsgerr *err, void *arg)
+{
+	int *ret = arg;
+	*ret = err->error;
+	return NL_STOP;
+}
+
+static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
+{
+	int *ret = arg;
+	*ret = 0;
+	return NL_SKIP;
+}
+
+static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
+{
+	int *ret = arg;
+	*ret = 0;
+	return NL_STOP;
+}
+
+static int nl80211_msg_response(struct nl_msg *msg, void *arg)
+{
+	return NL_SKIP;
+}
+
+static void nl80211_free(struct nl80211_msg_conveyor *cv)
+{
+	if (cv)
+	{
+		if (cv->cb)
+			nl_cb_put(cv->cb);
+
+		if (cv->msg)
+			nlmsg_free(cv->msg);
+
+		cv->cb  = NULL;
+		cv->msg = NULL;
+	}
+}
+
+static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, int cmd, int flags)
+{
+	static struct nl80211_msg_conveyor cv;
+
+	int ifidx = -1, phyidx = -1;
+	struct nl_msg *req = NULL;
+	struct nl_cb *cb = NULL;
+
+	if (nl80211_init() < 0)
+		goto err;
+
+	if (!strncmp(ifname, "phy", 3))
+		phyidx = atoi(&ifname[3]);
+	else if (!strncmp(ifname, "radio", 5))
+		phyidx = atoi(&ifname[5]);
+	else if (!strncmp(ifname, "mon.", 4))
+		ifidx = if_nametoindex(&ifname[4]);
+	else
+		ifidx = if_nametoindex(ifname);
+
+	if ((ifidx < 0) && (phyidx < 0))
+		return NULL;
+
+	req = nlmsg_alloc();
+	if (!req)
+		goto err;
+
+	cb = nl_cb_alloc(NL_CB_DEFAULT);
+	if (!cb)
+		goto err;
+
+	genlmsg_put(req, 0, 0, genl_family_get_id(nls->nl80211), 0,
+		flags, cmd, 0);
+
+	if (ifidx > -1)
+		NLA_PUT_U32(req, NL80211_ATTR_IFINDEX, ifidx);
+
+	if (phyidx > -1)
+		NLA_PUT_U32(req, NL80211_ATTR_WIPHY, phyidx);
+
+	cv.msg = req;
+	cv.cb  = cb;
+
+	return &cv;
+
+err:
+nla_put_failure:
+	if (cb)
+		nl_cb_put(cb);
+
+	if (req)
+		nlmsg_free(req);
+
+	return NULL;
+}
+
+static struct nl80211_msg_conveyor * nl80211_send(
+	struct nl80211_msg_conveyor *cv,
+	int (*cb_func)(struct nl_msg *, void *), void *cb_arg
+) {
+	static struct nl80211_msg_conveyor rcv;
+	int err = 1;
+
+	if (cb_func)
+		nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
+	else
+		nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
+
+	if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
+		goto err;
+
+	nl_cb_err(cv->cb,               NL_CB_CUSTOM, nl80211_msg_error,  &err);
+	nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
+	nl_cb_set(cv->cb, NL_CB_ACK,    NL_CB_CUSTOM, nl80211_msg_ack,    &err);
+
+	while (err > 0)
+		nl_recvmsgs(nls->nl_sock, cv->cb);
+
+	return &rcv;
+
+err:
+	nl_cb_put(cv->cb);
+	nlmsg_free(cv->msg);
+
+	return NULL;
+}
+
+static struct nlattr ** nl80211_parse(struct nl_msg *msg)
+{
+	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+	static struct nlattr *attr[NL80211_ATTR_MAX + 1];
+
+	nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
+		genlmsg_attrlen(gnlh, 0), NULL);
+
+	return attr;
+}
+
+static int nl80211_freq2channel(int freq)
+{
+    if (freq == 2484)
+        return 14;
+
+    if (freq < 2484)
+        return (freq - 2407) / 5;
+
+    return (freq / 5) - 1000;
+}
+
+static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
+{
+	int i, len;
+	char lkey[64] = { 0 };
+	const char *ln = buf;
+	static char lval[256] = { 0 };
+
+	int matched_if = ifname ? 0 : 1;
+
+
+	for( i = 0, len = strlen(buf); i < len; i++ )
+	{
+		if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
+		{
+			ln++;
+		}
+		else if (!lkey[0] && (buf[i] == '='))
+		{
+			if ((&buf[i] - ln) > 0)
+				memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
+		}
+		else if (buf[i] == '\n')
+		{
+			if (lkey[0])
+			{
+				memcpy(lval, ln + strlen(lkey) + 1,
+					min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
+
+				if ((ifname != NULL) &&
+				    (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
+				{
+					matched_if = !strcmp(lval, ifname);
+				}
+				else if (matched_if && !strcmp(lkey, key))
+				{
+					return lval;
+				}
+			}
+
+			ln = &buf[i+1];
+			memset(lkey, 0, sizeof(lkey));
+			memset(lval, 0, sizeof(lval));
+		}
+	}
+
+	return NULL;
+}
+
+static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
+{
+	char *buf = arg;
+	struct nlattr **attr = nl80211_parse(msg);
+
+	if (attr[NL80211_ATTR_WIPHY_NAME])
+		sprintf(buf, "%s", nla_data(attr[NL80211_ATTR_WIPHY_NAME]));
+	else
+		buf[0] = 0;
+
+	return NL_SKIP;
+}
+
+static char * nl80211_ifname2phy(const char *ifname)
+{
+	static char phy[32] = { 0 };
+	struct nl80211_msg_conveyor *req;
+
+	memset(phy, 0, sizeof(phy));
+
+	req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
+	if (req)
+	{
+		nl80211_send(req, nl80211_ifname2phy_cb, phy);
+		nl80211_free(req);
+	}
+
+	return phy[0] ? phy : NULL;
+}
+
+static char * nl80211_hostapd_info(const char *ifname)
+{
+	char *phy;
+	char path[32] = { 0 };
+	static char buf[4096] = { 0 };
+	FILE *conf;
+
+	if ((phy = nl80211_ifname2phy(ifname)) != NULL)
+	{
+		snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
+
+		if ((conf = fopen(path, "r")) != NULL)
+		{
+			fread(buf, sizeof(buf) - 1, 1, conf);
+			fclose(conf);
+
+			return buf;
+		}
+	}
+
+	return NULL;
+}
+
+static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
+{
+	fd_set rfds;
+	struct timeval tv = { 2, 0 };
+
+	FD_ZERO(&rfds);
+	FD_SET(sock, &rfds);
+
+	memset(buf, 0, blen);
+
+
+	if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
+		return -1;
+
+	if (!FD_ISSET(sock, &rfds))
+		return -1;
+
+	return recv(sock, buf, blen, 0);
+}
+
+static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
+								   const char *event)
+{
+	int numtry = 0;
+	int sock = -1;
+	char *rv = NULL;
+	size_t remote_length, local_length;
+	static char buffer[10240] = { 0 };
+
+	struct sockaddr_un local = { 0 };
+	struct sockaddr_un remote = { 0 };
+
+
+	sock = socket(PF_UNIX, SOCK_DGRAM, 0);
+	if (sock < 0)
+		return NULL;
+
+	remote.sun_family = AF_UNIX;
+	remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
+		"/var/run/wpa_supplicant-%s/%s", ifname, ifname);
+
+	if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
+		goto out;
+
+	if (connect(sock, (struct sockaddr *) &remote, remote_length))
+		goto out;
+
+	local.sun_family = AF_UNIX;
+	local_length = sizeof(local.sun_family) + sprintf(local.sun_path,
+		"/var/run/iwinfo-%s-%d", ifname, getpid());
+
+	if (bind(sock, (struct sockaddr *) &local, local_length))
+		goto out;
+
+
+	send(sock, "ATTACH", 6, 0);
+
+	if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
+		goto out;
+
+
+	send(sock, cmd, strlen(cmd), 0);
+
+	while( numtry++ < 5 )
+	{
+		if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
+		{
+			if (event)
+				continue;
+
+			break;
+		}
+
+		if ((!event && buffer[0] != '<') || strstr(buffer, event))
+			break;
+	}
+
+	rv = buffer;
+
+out:
+	close(sock);
+
+	if (local.sun_family)
+		unlink(local.sun_path);
+
+	return rv;
+}
+
+static inline int nl80211_readint(const char *path)
+{
+	int fd;
+	int rv = -1;
+	char buffer[16];
+
+	if ((fd = open(path, O_RDONLY)) > -1)
+	{
+		if (read(fd, buffer, sizeof(buffer)) > 0)
+			rv = atoi(buffer);
+
+		close(fd);
+	}
+
+	return rv;
+}
+
+static char * nl80211_phy2ifname(const char *ifname)
+{
+	int fd, ifidx = -1, cifidx = -1, phyidx = -1;
+	char buffer[64];
+	static char nif[IFNAMSIZ] = { 0 };
+
+	DIR *d;
+	struct dirent *e;
+
+	if (!ifname)
+		return NULL;
+	else if (!strncmp(ifname, "phy", 3))
+		phyidx = atoi(&ifname[3]);
+	else if (!strncmp(ifname, "radio", 5))
+		phyidx = atoi(&ifname[5]);
+
+	memset(nif, 0, sizeof(nif));
+
+	if (phyidx > -1)
+	{
+		if ((d = opendir("/sys/class/net")) != NULL)
+		{
+			while( (e = readdir(d)) != NULL )
+			{
+				snprintf(buffer, sizeof(buffer),
+					"/sys/class/net/%s/phy80211/index", e->d_name);
+
+				if (nl80211_readint(buffer) == phyidx)
+				{
+					snprintf(buffer, sizeof(buffer),
+						"/sys/class/net/%s/ifindex", e->d_name);
+
+					if( (cifidx = nl80211_readint(buffer)) >= 0 &&
+					    ((ifidx < 0) || (cifidx < ifidx)) )
+					{
+						ifidx = cifidx;
+						strncpy(nif, e->d_name, sizeof(nif));
+					}
+				}
+			}
+
+			closedir(d);
+		}
+	}
+
+	return nif[0] ? nif : NULL;
+}
+
+static char * nl80211_ifadd(const char *ifname)
+{
+	int phyidx;
+	char *rv = NULL;
+	static char nif[IFNAMSIZ] = { 0 };
+	struct nl80211_msg_conveyor *req, *res;
+
+	req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
+	if (req)
+	{
+		snprintf(nif, sizeof(nif), "tmp.%s", ifname);
+
+		NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
+		NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
+
+		nl80211_send(req, NULL, NULL);
+
+		rv = nif;
+
+	nla_put_failure:
+		nl80211_free(req);
+	}
+
+	return rv;
+}
+
+static void nl80211_ifdel(const char *ifname)
+{
+	struct nl80211_msg_conveyor *req;
+
+	req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
+	if (req)
+	{
+		NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
+
+		nl80211_send(req, NULL, NULL);
+
+	nla_put_failure:
+		nl80211_free(req);
+	}
+}
+
+static void nl80211_hostapd_hup(const char *ifname)
+{
+	int fd, pid = 0;
+	char buf[32];
+	char *phy = nl80211_ifname2phy(ifname);
+
+	if (phy)
+	{
+		snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
+		if ((fd = open(buf, O_RDONLY)) > 0)
+		{
+			if (read(fd, buf, sizeof(buf)) > 0)
+				pid = atoi(buf);
+
+			close(fd);
+		}
+
+		if (pid > 0)
+			kill(pid, 1);
+	}
+}
+
+
+int nl80211_probe(const char *ifname)
+{
+	return !!nl80211_ifname2phy(ifname);
+}
+
+void nl80211_close(void)
+{
+	if (nls)
+	{
+		if (nls->nl_sock)
+			nl_socket_free(nls->nl_sock);
+
+		if (nls->nl_cache)
+			nl_cache_free(nls->nl_cache);
+
+		free(nls);
+		nls = NULL;
+	}
+}
+
+int nl80211_get_mode(const char *ifname, char *buf)
+{
+	return wext_get_mode(ifname, buf);
+}
+
+int nl80211_get_ssid(const char *ifname, char *buf)
+{
+	char *ssid;
+
+	if (!wext_get_ssid(ifname, buf))
+	{
+		return 0;
+	}
+	else if( (ssid = nl80211_hostapd_info(ifname)) &&
+	         (ssid = nl80211_getval(ifname, ssid, "ssid")) )
+	{
+		memcpy(buf, ssid, strlen(ssid));
+		return 0;
+	}
+
+	return -1;
+}
+
+int nl80211_get_bssid(const char *ifname, char *buf)
+{
+	char *bssid;
+	unsigned char mac[6];
+
+	if (!wext_get_bssid(ifname, buf))
+	{
+		return 0;
+	}
+	else if((bssid = nl80211_hostapd_info(ifname)) &&
+	         (bssid = nl80211_getval(ifname, bssid, "bssid")))
+	{
+		mac[0] = strtol(&bssid[0],  NULL, 16);
+		mac[1] = strtol(&bssid[3],  NULL, 16);
+		mac[2] = strtol(&bssid[6],  NULL, 16);
+		mac[3] = strtol(&bssid[9],  NULL, 16);
+		mac[4] = strtol(&bssid[12], NULL, 16);
+		mac[5] = strtol(&bssid[15], NULL, 16);
+
+		sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
+			mac[0], mac[1], mac[2],	mac[3], mac[4], mac[5]);
+
+		return 0;
+	}
+
+	return -1;
+}
+
+int nl80211_get_channel(const char *ifname, int *buf)
+{
+	char *first;
+
+	if (!wext_get_channel(ifname, buf))
+		return 0;
+
+	else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
+		return wext_get_channel(first, buf);
+
+	return -1;
+}
+
+int nl80211_get_frequency(const char *ifname, int *buf)
+{
+	char *first;
+
+	if (!wext_get_frequency(ifname, buf))
+		return 0;
+
+	else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
+		return wext_get_frequency(first, buf);
+
+	return -1;
+}
+
+int nl80211_get_txpower(const char *ifname, int *buf)
+{
+	return wext_get_txpower(ifname, buf);
+}
+
+
+static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
+{
+	int8_t dbm;
+	int16_t mbit;
+	struct nl80211_rssi_rate *rr = arg;
+	struct nlattr **attr = nl80211_parse(msg);
+	struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
+	struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
+
+	static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
+		[NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
+		[NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
+		[NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
+		[NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
+		[NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
+		[NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
+		[NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
+		[NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
+		[NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
+		[NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
+	};
+
+	static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
+		[NL80211_RATE_INFO_BITRATE]      = { .type = NLA_U16  },
+		[NL80211_RATE_INFO_MCS]          = { .type = NLA_U8   },
+		[NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
+		[NL80211_RATE_INFO_SHORT_GI]     = { .type = NLA_FLAG },
+	};
+
+	if (attr[NL80211_ATTR_STA_INFO])
+	{
+		if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
+				attr[NL80211_ATTR_STA_INFO], stats_policy) )
+		{
+			if (sinfo[NL80211_STA_INFO_SIGNAL])
+			{
+				dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
+				rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
+			}
+
+			if (sinfo[NL80211_STA_INFO_TX_BITRATE])
+			{
+				if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
+						sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
+				{
+					if (rinfo[NL80211_RATE_INFO_BITRATE])
+					{
+						mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
+						rr->rate = rr->rate
+							? (int16_t)((rr->rate + mbit) / 2) : mbit;
+					}
+				}
+			}
+		}
+	}
+
+	return NL_SKIP;
+}
+
+static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
+{
+	DIR *d;
+	struct dirent *de;
+	struct nl80211_msg_conveyor *req;
+
+	r->rssi = 0;
+	r->rate = 0;
+
+	if ((d = opendir("/sys/class/net")) != NULL)
+	{
+		while ((de = readdir(d)) != NULL)
+		{
+			if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
+				(!de->d_name[strlen(ifname)] ||
+				 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
+			{
+				req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
+								  NLM_F_DUMP);
+
+				if (req)
+				{
+					nl80211_send(req, nl80211_fill_signal_cb, r);
+					nl80211_free(req);
+				}
+			}
+		}
+
+		closedir(d);
+	}
+}
+
+int nl80211_get_bitrate(const char *ifname, int *buf)
+{
+	struct nl80211_rssi_rate rr;
+
+	if (!wext_get_bitrate(ifname, buf))
+		return 0;
+
+	nl80211_fill_signal(ifname, &rr);
+
+	if (rr.rate)
+	{
+		*buf = (rr.rate * 100);
+		return 0;
+	}
+
+	return -1;
+}
+
+int nl80211_get_signal(const char *ifname, int *buf)
+{
+	struct nl80211_rssi_rate rr;
+
+	if (!wext_get_signal(ifname, buf))
+		return 0;
+
+	nl80211_fill_signal(ifname, &rr);
+
+	if (rr.rssi)
+	{
+		*buf = rr.rssi;
+		return 0;
+	}
+
+	return -1;
+}
+
+static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
+{
+	int8_t *noise = arg;
+	struct nlattr **tb = nl80211_parse(msg);
+	struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
+
+	static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
+		[NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
+		[NL80211_SURVEY_INFO_NOISE]     = { .type = NLA_U8  },
+	};
+
+	if (!tb[NL80211_ATTR_SURVEY_INFO])
+		return NL_SKIP;
+
+	if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
+						 tb[NL80211_ATTR_SURVEY_INFO], sp))
+		return NL_SKIP;
+
+	if (!si[NL80211_SURVEY_INFO_NOISE])
+		return NL_SKIP;
+
+	if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
+		*noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
+
+	return NL_SKIP;
+}
+
+
+int nl80211_get_noise(const char *ifname, int *buf)
+{
+	int8_t noise;
+	struct nl80211_msg_conveyor *req;
+
+	req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
+	if (req)
+	{
+		noise = 0;
+
+		nl80211_send(req, nl80211_get_noise_cb, &noise);
+		nl80211_free(req);
+
+		if (noise)
+		{
+			*buf = noise;
+			return 0;
+		}
+	}
+
+	return -1;
+}
+
+int nl80211_get_quality(const char *ifname, int *buf)
+{
+	int signal;
+
+	if (wext_get_quality(ifname, buf))
+	{
+		*buf = 0;
+
+		if (!nl80211_get_signal(ifname, &signal))
+		{
+			/* A positive signal level is usually just a quality
+			 * value, pass through as-is */
+			if (signal >= 0)
+			{
+				*buf = signal;
+			}
+
+			/* The cfg80211 wext compat layer assumes a signal range
+			 * of -110 dBm to -40 dBm, the quality value is derived
+			 * by adding 110 to the signal level */
+			else
+			{
+				if (signal < -110)
+					signal = -110;
+				else if (signal > -40)
+					signal = -40;
+
+				*buf = (signal + 110);
+			}
+		}
+	}
+
+	return 0;
+}
+
+int nl80211_get_quality_max(const char *ifname, int *buf)
+{
+	if (wext_get_quality_max(ifname, buf))
+		/* The cfg80211 wext compat layer assumes a maximum
+		 * quality of 70 */
+		*buf = 70;
+
+	return 0;
+}
+
+int nl80211_get_encryption(const char *ifname, char *buf)
+{
+	int i;
+	char k[9];
+	char *val, *res;
+	struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
+
+	/* WPA supplicant */
+	if( (res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
+	    (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
+	{
+		/* WEP */
+		if (strstr(val, "WEP"))
+		{
+			if (strstr(val, "WEP-40"))
+				c->pair_ciphers |= IWINFO_CIPHER_WEP40;
+
+			else if (strstr(val, "WEP-104"))
+				c->pair_ciphers |= IWINFO_CIPHER_WEP104;
+
+			c->enabled       = 1;
+			c->group_ciphers = c->pair_ciphers;
+
+			c->auth_suites |= IWINFO_KMGMT_NONE;
+			c->auth_algs   |= IWINFO_AUTH_OPEN; /* XXX: assumption */
+		}
+
+		/* WPA */
+		else
+		{
+			if (strstr(val, "TKIP"))
+				c->pair_ciphers |= IWINFO_CIPHER_TKIP;
+
+			else if (strstr(val, "CCMP"))
+				c->pair_ciphers |= IWINFO_CIPHER_CCMP;
+
+			else if (strstr(val, "NONE"))
+				c->pair_ciphers |= IWINFO_CIPHER_NONE;
+
+			else if (strstr(val, "WEP-40"))
+				c->pair_ciphers |= IWINFO_CIPHER_WEP40;
+
+			else if (strstr(val, "WEP-104"))
+				c->pair_ciphers |= IWINFO_CIPHER_WEP104;
+
+
+			if ((val = nl80211_getval(NULL, res, "group_cipher")))
+			{
+				if (strstr(val, "TKIP"))
+					c->group_ciphers |= IWINFO_CIPHER_TKIP;
+
+				else if (strstr(val, "CCMP"))
+					c->group_ciphers |= IWINFO_CIPHER_CCMP;
+
+				else if (strstr(val, "NONE"))
+					c->group_ciphers |= IWINFO_CIPHER_NONE;
+
+				else if (strstr(val, "WEP-40"))
+					c->group_ciphers |= IWINFO_CIPHER_WEP40;
+
+				else if (strstr(val, "WEP-104"))
+					c->group_ciphers |= IWINFO_CIPHER_WEP104;
+			}
+
+
+			if ((val = nl80211_getval(NULL, res, "key_mgmt")))
+			{
+				if (strstr(val, "WPA2"))
+					c->wpa_version = 2;
+
+				else if (strstr(val, "WPA"))
+					c->wpa_version = 1;
+
+
+				if (strstr(val, "PSK"))
+					c->auth_suites |= IWINFO_KMGMT_PSK;
+
+				else if (strstr(val, "EAP") || strstr(val, "802.1X"))
+					c->auth_suites |= IWINFO_KMGMT_8021x;
+
+				else if (strstr(val, "NONE"))
+					c->auth_suites |= IWINFO_KMGMT_NONE;
+			}
+
+			c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
+		}
+
+		return 0;
+	}
+
+	/* Hostapd */
+	else if ((res = nl80211_hostapd_info(ifname)))
+	{
+		if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
+			c->wpa_version = atoi(val);
+
+		val = nl80211_getval(ifname, res, "wpa_key_mgmt");
+
+		if (!val || strstr(val, "PSK"))
+			c->auth_suites |= IWINFO_KMGMT_PSK;
+
+		if (val && strstr(val, "EAP"))
+			c->auth_suites |= IWINFO_KMGMT_8021x;
+
+		if (val && strstr(val, "NONE"))
+			c->auth_suites |= IWINFO_KMGMT_NONE;
+
+		if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
+		{
+			if (strstr(val, "TKIP"))
+				c->pair_ciphers |= IWINFO_CIPHER_TKIP;
+
+			if (strstr(val, "CCMP"))
+				c->pair_ciphers |= IWINFO_CIPHER_CCMP;
+
+			if (strstr(val, "NONE"))
+				c->pair_ciphers |= IWINFO_CIPHER_NONE;
+		}
+
+		if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
+		{
+			switch(atoi(val)) {
+				case 1:
+					c->auth_algs |= IWINFO_AUTH_OPEN;
+					break;
+
+				case 2:
+					c->auth_algs |= IWINFO_AUTH_SHARED;
+					break;
+
+				case 3:
+					c->auth_algs |= IWINFO_AUTH_OPEN;
+					c->auth_algs |= IWINFO_AUTH_SHARED;
+					break;
+
+				default:
+					break;
+			}
+
+			for( i = 0; i < 4; i++ )
+			{
+				snprintf(k, sizeof(k), "wep_key%d", i);
+
+				if ((val = nl80211_getval(ifname, res, k)))
+				{
+					if ((strlen(val) == 5) || (strlen(val) == 10))
+						c->pair_ciphers |= IWINFO_CIPHER_WEP40;
+
+					else if ((strlen(val) == 13) || (strlen(val) == 26))
+						c->pair_ciphers |= IWINFO_CIPHER_WEP104;
+				}
+			}
+		}
+
+		c->group_ciphers = c->pair_ciphers;
+		c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
+
+		return 0;
+	}
+
+	return -1;
+}
+
+
+static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
+{
+	struct nl80211_array_buf *arr = arg;
+	struct iwinfo_assoclist_entry *e = arr->buf;
+	struct nlattr **attr = nl80211_parse(msg);
+	struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
+
+	static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
+		[NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32    },
+		[NL80211_STA_INFO_RX_BYTES]      = { .type = NLA_U32    },
+		[NL80211_STA_INFO_TX_BYTES]      = { .type = NLA_U32    },
+		[NL80211_STA_INFO_RX_PACKETS]    = { .type = NLA_U32    },
+		[NL80211_STA_INFO_TX_PACKETS]    = { .type = NLA_U32    },
+		[NL80211_STA_INFO_SIGNAL]        = { .type = NLA_U8     },
+		[NL80211_STA_INFO_TX_BITRATE]    = { .type = NLA_NESTED },
+		[NL80211_STA_INFO_LLID]          = { .type = NLA_U16    },
+		[NL80211_STA_INFO_PLID]          = { .type = NLA_U16    },
+		[NL80211_STA_INFO_PLINK_STATE]   = { .type = NLA_U8     },
+	};
+
+	/* advance to end of array */
+	e += arr->count;
+
+	if (attr[NL80211_ATTR_MAC])
+		memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
+
+	if (attr[NL80211_ATTR_STA_INFO])
+	{
+		if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
+				attr[NL80211_ATTR_STA_INFO], stats_policy))
+		{
+			if (sinfo[NL80211_STA_INFO_SIGNAL])
+				e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
+		}
+	}
+
+	e->noise = 0; /* filled in by caller */
+	arr->count++;
+
+	return NL_SKIP;
+}
+
+int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
+{
+	DIR *d;
+	int i, noise = 0;
+	struct dirent *de;
+	struct nl80211_msg_conveyor *req;
+	struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
+	struct iwinfo_assoclist_entry *e;
+
+	if ((d = opendir("/sys/class/net")) != NULL)
+	{
+		while ((de = readdir(d)) != NULL)
+		{
+			if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
+				(!de->d_name[strlen(ifname)] ||
+				 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
+			{
+				req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
+								  NLM_F_DUMP);
+
+				if (req)
+				{
+					nl80211_send(req, nl80211_get_assoclist_cb, &arr);
+					nl80211_free(req);
+				}
+
+				break;
+			}
+		}
+
+		closedir(d);
+
+		if (!nl80211_get_noise(ifname, &noise))
+			for (i = 0, e = arr.buf; i < arr.count; i++, e++)
+				e->noise = noise;
+
+		*len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
+		return 0;
+	}
+
+	return -1;
+}
+
+static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
+{
+	int *dbm_max = arg;
+	int ch_cur, ch_cmp, bands_remain, freqs_remain;
+
+	struct nlattr **attr = nl80211_parse(msg);
+	struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
+	struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
+	struct nlattr *band, *freq;
+
+	static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
+		[NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
+		[NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
+		[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
+		[NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
+		[NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
+		[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
+	};
+
+	ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
+	*dbm_max = -1;
+
+	nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
+	{
+		nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
+			  nla_len(band), NULL);
+
+		nla_for_each_nested(freq,
+			bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
+		{
+			nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
+				nla_data(freq), nla_len(freq), freq_policy);
+
+			ch_cmp = nl80211_freq2channel(
+				nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
+
+			if( (!ch_cur || (ch_cmp == ch_cur)) &&
+				freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
+			{
+				*dbm_max = (int)(0.01 * nla_get_u32(
+					freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
+
+				break;
+			}
+		}
+	}
+
+	return NL_SKIP;
+}
+
+int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
+{
+	int ch_cur;
+	int dbm_max = -1, dbm_cur, dbm_cnt;
+	struct nl80211_msg_conveyor *req;
+	struct iwinfo_txpwrlist_entry entry;
+
+	if (nl80211_get_channel(ifname, &ch_cur))
+		ch_cur = 0;
+
+	req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
+	if (req)
+	{
+		/* initialize the value pointer with channel for callback */
+		dbm_max = ch_cur;
+
+		nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
+		nl80211_free(req);
+	}
+
+	if (dbm_max > -1)
+	{
+		for (dbm_cur = 0, dbm_cnt = 0;
+		     dbm_cur < dbm_max;
+		     dbm_cur++, dbm_cnt++)
+		{
+			entry.dbm = dbm_cur;
+			entry.mw  = iwinfo_dbm2mw(dbm_cur);
+
+			memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
+		}
+
+		entry.dbm = dbm_max;
+		entry.mw  = iwinfo_dbm2mw(dbm_max);
+
+		memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
+		dbm_cnt++;
+
+		*len = dbm_cnt * sizeof(entry);
+		return 0;
+	}
+
+	return -1;
+}
+
+static void nl80211_get_scancrypto(const char *spec,
+	struct iwinfo_crypto_entry *c)
+{
+	if (strstr(spec, "WPA") || strstr(spec, "WEP"))
+	{
+		c->enabled = 1;
+
+		if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
+			c->wpa_version = 3;
+
+		else if (strstr(spec, "WPA2"))
+			c->wpa_version = 2;
+
+		else if (strstr(spec, "WPA"))
+			c->wpa_version = 1;
+
+		else if (strstr(spec, "WEP"))
+			c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
+
+
+		if (strstr(spec, "PSK"))
+			c->auth_suites |= IWINFO_KMGMT_PSK;
+
+		if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
+			c->auth_suites |= IWINFO_KMGMT_8021x;
+
+		if (strstr(spec, "WPA-NONE"))
+			c->auth_suites |= IWINFO_KMGMT_NONE;
+
+
+		if (strstr(spec, "TKIP"))
+			c->pair_ciphers |= IWINFO_CIPHER_TKIP;
+
+		if (strstr(spec, "CCMP"))
+			c->pair_ciphers |= IWINFO_CIPHER_CCMP;
+
+		if (strstr(spec, "WEP-40"))
+			c->pair_ciphers |= IWINFO_CIPHER_WEP40;
+
+		if (strstr(spec, "WEP-104"))
+			c->pair_ciphers |= IWINFO_CIPHER_WEP104;
+
+		c->group_ciphers = c->pair_ciphers;
+	}
+	else
+	{
+		c->enabled = 0;
+	}
+}
+
+int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
+{
+	int freq, rssi, qmax, count;
+	char *res;
+	char ssid[128] = { 0 };
+	char bssid[18] = { 0 };
+	char cipher[256] = { 0 };
+
+	/* Got a radioX pseudo interface, find some interface on it or create one */
+	if (!strncmp(ifname, "radio", 5))
+	{
+		/* Reuse existing interface */
+		if ((res = nl80211_phy2ifname(ifname)) != NULL)
+		{
+			return nl80211_get_scanlist(res, buf, len);
+		}
+
+		/* Need to spawn a temporary iface for scanning */
+		else if ((res = nl80211_ifadd(ifname)) != NULL)
+		{
+			count = nl80211_get_scanlist(res, buf, len);
+			nl80211_ifdel(res);
+			return count;
+		}
+	}
+
+	struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
+
+	/* WPA supplicant */
+	if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
+	{
+		if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
+		{
+			nl80211_get_quality_max(ifname, &qmax);
+
+			/* skip header line */
+			while( *res++ != '\n' );
+
+			count = 0;
+
+			while( sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
+			              bssid, &freq, &rssi, cipher, ssid) > 0 )
+			{
+				/* BSSID */
+				e->mac[0] = strtol(&bssid[0],  NULL, 16);
+				e->mac[1] = strtol(&bssid[3],  NULL, 16);
+				e->mac[2] = strtol(&bssid[6],  NULL, 16);
+				e->mac[3] = strtol(&bssid[9],  NULL, 16);
+				e->mac[4] = strtol(&bssid[12], NULL, 16);
+				e->mac[5] = strtol(&bssid[15], NULL, 16);
+
+				/* SSID */
+				memcpy(e->ssid, ssid,
+					min(strlen(ssid), sizeof(e->ssid) - 1));
+
+				/* Mode (assume master) */
+				sprintf((char *)e->mode, "Master");
+
+				/* Channel */
+				e->channel = nl80211_freq2channel(freq);
+
+				/* Signal */
+				e->signal = rssi;
+
+				/* Quality */
+				if (rssi < 0)
+				{
+					/* The cfg80211 wext compat layer assumes a signal range
+					 * of -110 dBm to -40 dBm, the quality value is derived
+					 * by adding 110 to the signal level */
+					if (rssi < -110)
+						rssi = -110;
+					else if (rssi > -40)
+						rssi = -40;
+
+					e->quality = (rssi + 110);
+				}
+				else
+				{
+					e->quality = rssi;
+				}
+
+				/* Max. Quality */
+				e->quality_max = qmax;
+
+				/* Crypto */
+				nl80211_get_scancrypto(cipher, &e->crypto);
+
+				/* advance to next line */
+				while( *res && *res++ != '\n' );
+
+				count++;
+				e++;
+
+				memset(ssid, 0, sizeof(ssid));
+				memset(bssid, 0, sizeof(bssid));
+				memset(cipher, 0, sizeof(cipher));
+			}
+
+			*len = count * sizeof(struct iwinfo_scanlist_entry);
+			return 0;
+		}
+	}
+
+	/* AP scan */
+	else
+	{
+		/* Got a temp interface, don't create yet another one */
+		if (!strncmp(ifname, "tmp.", 4))
+		{
+			if (!iwinfo_ifup(ifname))
+				return -1;
+
+			wext_get_scanlist(ifname, buf, len);
+			iwinfo_ifdown(ifname);
+			return 0;
+		}
+
+		/* Spawn a new scan interface */
+		else
+		{
+			if (!(res = nl80211_ifadd(ifname)))
+				goto out;
+
+			if (!iwinfo_ifmac(res))
+				goto out;
+
+			/* if we can take the new interface up, the driver supports an
+			 * additional interface and there's no need to tear down the ap */
+			if (iwinfo_ifup(res))
+			{
+				wext_get_scanlist(res, buf, len);
+				iwinfo_ifdown(res);
+			}
+
+			/* driver cannot create secondary interface, take down ap
+			 * during scan */
+			else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
+			{
+				wext_get_scanlist(res, buf, len);
+				iwinfo_ifdown(res);
+				iwinfo_ifup(ifname);
+				nl80211_hostapd_hup(ifname);
+			}
+
+		out:
+			nl80211_ifdel(res);
+			return 0;
+		}
+	}
+
+	return -1;
+}
+
+static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
+{
+	int bands_remain, freqs_remain;
+
+	struct nl80211_array_buf *arr = arg;
+	struct iwinfo_freqlist_entry *e = arr->buf;
+
+	struct nlattr **attr = nl80211_parse(msg);
+	struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
+	struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
+	struct nlattr *band, *freq;
+
+	static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
+		[NL80211_FREQUENCY_ATTR_FREQ]         = { .type = NLA_U32  },
+		[NL80211_FREQUENCY_ATTR_DISABLED]     = { .type = NLA_FLAG },
+		[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
+		[NL80211_FREQUENCY_ATTR_NO_IBSS]      = { .type = NLA_FLAG },
+		[NL80211_FREQUENCY_ATTR_RADAR]        = { .type = NLA_FLAG },
+		[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32  },
+	};
+
+	nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
+	{
+		nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
+			nla_len(band), NULL);
+
+		nla_for_each_nested(freq,
+			bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
+		{
+			nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
+				nla_data(freq), nla_len(freq), NULL);
+
+			if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
+				freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
+				continue;
+
+			e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
+			e->channel = nl80211_freq2channel(e->mhz);
+
+			e->restricted = (
+				freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
+				freqs[NL80211_FREQUENCY_ATTR_NO_IBSS]      ||
+				freqs[NL80211_FREQUENCY_ATTR_RADAR]
+			) ? 1 : 0;
+
+			e++;
+			arr->count++;
+		}
+	}
+
+	return NL_SKIP;
+}
+
+int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
+{
+	struct nl80211_msg_conveyor *req;
+	struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
+
+	req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
+	if (req)
+	{
+		nl80211_send(req, nl80211_get_freqlist_cb, &arr);
+		nl80211_free(req);
+	}
+
+	if (arr.count > 0)
+	{
+		*len = arr.count * sizeof(struct iwinfo_freqlist_entry);
+		return 0;
+	}
+
+	return -1;
+}
+
+static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
+{
+	char *buf = arg;
+	struct nlattr **attr = nl80211_parse(msg);
+
+	if (attr[NL80211_ATTR_REG_ALPHA2])
+		memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
+	else
+		buf[0] = 0;
+
+	return NL_SKIP;
+}
+
+int nl80211_get_country(const char *ifname, char *buf)
+{
+	int rv = -1;
+	struct nl80211_msg_conveyor *req;
+
+	req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
+	if (req)
+	{
+		nl80211_send(req, nl80211_get_country_cb, buf);
+		nl80211_free(req);
+
+		if (buf[0])
+			rv = 0;
+	}
+
+	return rv;
+}
+
+int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
+{
+	int i, count;
+	struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
+	const struct iwinfo_iso3166_label *l;
+
+	for( l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++ )
+	{
+		e->iso3166 = l->iso3166;
+		e->ccode[0] = (l->iso3166 / 256);
+		e->ccode[1] = (l->iso3166 % 256);
+	}
+
+	*len = (count * sizeof(struct iwinfo_country_entry));
+	return 0;
+}
+
+static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
+{
+	int *modes = arg;
+	int bands_remain, freqs_remain;
+	uint16_t caps = 0;
+	struct nlattr **attr = nl80211_parse(msg);
+	struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
+	struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
+	struct nlattr *band, *freq;
+
+	*modes = 0;
+
+	if (attr[NL80211_ATTR_WIPHY_BANDS])
+	{
+		nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
+		{
+			nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
+				nla_len(band), NULL);
+
+			if (bands[NL80211_BAND_ATTR_HT_CAPA])
+				caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
+
+			/* Treat any nonzero capability as 11n */
+			if (caps > 0)
+				*modes |= IWINFO_80211_N;
+
+			nla_for_each_nested(freq,
+				bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
+			{
+				nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
+					nla_data(freq), nla_len(freq), NULL);
+
+				if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
+					continue;
+
+				if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
+				{
+					*modes |= IWINFO_80211_B;
+					*modes |= IWINFO_80211_G;
+				}
+				else
+				{
+					*modes |= IWINFO_80211_A;
+				}
+			}
+		}
+	}
+
+	return NL_SKIP;
+}
+
+int nl80211_get_hwmodelist(const char *ifname, int *buf)
+{
+	struct nl80211_msg_conveyor *req;
+
+	req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
+	if (req)
+	{
+		nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
+		nl80211_free(req);
+	}
+
+	return *buf ? 0 : -1;
+}
+
+int nl80211_get_mbssid_support(const char *ifname, int *buf)
+{
+	/* Test whether we can create another interface */
+	char *nif = nl80211_ifadd(ifname);
+
+	if (nif)
+	{
+		*buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
+
+		iwinfo_ifdown(nif);
+		nl80211_ifdel(nif);
+
+		return 0;
+	}
+
+	return -1;
+}