d1bd1b4e27
SVN-Revision: 31053
2030 lines
44 KiB
C
2030 lines
44 KiB
C
/*
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* iwinfo - Wireless Information Library - NL80211 Backend
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*
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* Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
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*
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* The iwinfo library is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* The iwinfo library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the iwinfo library. If not, see http://www.gnu.org/licenses/.
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*
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* The signal handling code is derived from the official madwifi tools,
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* wlanconfig.c in particular. The encryption property handling was
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* inspired by the hostapd madwifi driver.
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*
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* Parts of this code are derived from the Linux iw utility.
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*/
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#include "iwinfo/nl80211.h"
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#include "iwinfo/wext.h"
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#define min(x, y) ((x) < (y)) ? (x) : (y)
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static struct nl80211_state *nls = NULL;
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static int nl80211_init(void)
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{
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int err, fd;
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if (!nls)
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{
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nls = malloc(sizeof(struct nl80211_state));
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if (!nls) {
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err = -ENOMEM;
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goto err;
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}
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nls->nl_sock = nl_socket_alloc();
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if (!nls->nl_sock) {
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err = -ENOMEM;
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goto err;
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}
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if (genl_connect(nls->nl_sock)) {
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err = -ENOLINK;
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goto err;
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}
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fd = nl_socket_get_fd(nls->nl_sock);
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if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
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err = -EINVAL;
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goto err;
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}
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if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
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err = -ENOMEM;
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goto err;
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}
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nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
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if (!nls->nl80211) {
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err = -ENOENT;
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goto err;
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}
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nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
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if (!nls->nlctrl) {
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err = -ENOENT;
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goto err;
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}
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}
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return 0;
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err:
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nl80211_close();
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return err;
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}
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static int nl80211_msg_error(struct sockaddr_nl *nla,
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struct nlmsgerr *err, void *arg)
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{
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int *ret = arg;
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*ret = err->error;
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return NL_STOP;
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}
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static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
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{
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int *ret = arg;
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*ret = 0;
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return NL_SKIP;
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}
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static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
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{
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int *ret = arg;
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*ret = 0;
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return NL_STOP;
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}
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static int nl80211_msg_response(struct nl_msg *msg, void *arg)
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{
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return NL_SKIP;
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}
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static void nl80211_free(struct nl80211_msg_conveyor *cv)
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{
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if (cv)
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{
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if (cv->cb)
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nl_cb_put(cv->cb);
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if (cv->msg)
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nlmsg_free(cv->msg);
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cv->cb = NULL;
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cv->msg = NULL;
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}
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}
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static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
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int cmd, int flags)
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{
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static struct nl80211_msg_conveyor cv;
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struct nl_msg *req = NULL;
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struct nl_cb *cb = NULL;
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req = nlmsg_alloc();
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if (!req)
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goto err;
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cb = nl_cb_alloc(NL_CB_DEFAULT);
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if (!cb)
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goto err;
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genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
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cv.msg = req;
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cv.cb = cb;
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return &cv;
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err:
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nla_put_failure:
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if (cb)
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nl_cb_put(cb);
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if (req)
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nlmsg_free(req);
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return NULL;
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}
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static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
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{
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if (nl80211_init() < 0)
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return NULL;
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return nl80211_new(nls->nlctrl, cmd, flags);
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}
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static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
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int cmd, int flags)
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{
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int ifidx = -1, phyidx = -1;
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struct nl80211_msg_conveyor *cv;
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if (nl80211_init() < 0)
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return NULL;
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if (!strncmp(ifname, "phy", 3))
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phyidx = atoi(&ifname[3]);
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else if (!strncmp(ifname, "radio", 5))
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phyidx = atoi(&ifname[5]);
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else if (!strncmp(ifname, "mon.", 4))
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ifidx = if_nametoindex(&ifname[4]);
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else
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ifidx = if_nametoindex(ifname);
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if ((ifidx < 0) && (phyidx < 0))
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return NULL;
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cv = nl80211_new(nls->nl80211, cmd, flags);
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if (!cv)
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return NULL;
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if (ifidx > -1)
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NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
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if (phyidx > -1)
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NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
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return cv;
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nla_put_failure:
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nl80211_free(cv);
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return NULL;
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}
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static struct nl80211_msg_conveyor * nl80211_send(
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struct nl80211_msg_conveyor *cv,
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int (*cb_func)(struct nl_msg *, void *), void *cb_arg
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) {
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static struct nl80211_msg_conveyor rcv;
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int err = 1;
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if (cb_func)
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nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
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else
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nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
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if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
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goto err;
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nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
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nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
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nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
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while (err > 0)
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nl_recvmsgs(nls->nl_sock, cv->cb);
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return &rcv;
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err:
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nl_cb_put(cv->cb);
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nlmsg_free(cv->msg);
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return NULL;
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}
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static struct nlattr ** nl80211_parse(struct nl_msg *msg)
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{
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struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
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static struct nlattr *attr[NL80211_ATTR_MAX + 1];
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nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
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genlmsg_attrlen(gnlh, 0), NULL);
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return attr;
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}
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static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
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{
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struct nl80211_group_conveyor *cv = arg;
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struct nlattr **attr = nl80211_parse(msg);
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struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
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struct nlattr *mgrp;
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int mgrpidx;
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if (!attr[CTRL_ATTR_MCAST_GROUPS])
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return NL_SKIP;
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nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
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{
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nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
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nla_data(mgrp), nla_len(mgrp), NULL);
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if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
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mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
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!strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
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cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
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{
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cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
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break;
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}
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}
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return NL_SKIP;
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}
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static int nl80211_subscribe(const char *family, const char *group)
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{
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struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
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struct nl80211_msg_conveyor *req;
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req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
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if (req)
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{
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NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
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nl80211_send(req, nl80211_subscribe_cb, &cv);
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nla_put_failure:
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nl80211_free(req);
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}
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return nl_socket_add_membership(nls->nl_sock, cv.id);
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}
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static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
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{
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struct nl80211_event_conveyor *cv = arg;
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struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
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if (gnlh->cmd == cv->wait)
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cv->recv = gnlh->cmd;
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return NL_SKIP;
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}
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static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
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{
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return NL_OK;
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}
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static int nl80211_wait(const char *family, const char *group, int cmd)
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{
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struct nl80211_event_conveyor cv = { .wait = cmd };
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struct nl_cb *cb;
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if (nl80211_subscribe(family, group))
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return -ENOENT;
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cb = nl_cb_alloc(NL_CB_DEFAULT);
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if (!cb)
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return -ENOMEM;
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nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
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nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
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while (!cv.recv)
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nl_recvmsgs(nls->nl_sock, cb);
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nl_cb_put(cb);
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return 0;
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}
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static int nl80211_freq2channel(int freq)
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{
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if (freq == 2484)
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return 14;
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if (freq < 2484)
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return (freq - 2407) / 5;
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return (freq / 5) - 1000;
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}
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static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
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{
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int i, len;
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char lkey[64] = { 0 };
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const char *ln = buf;
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static char lval[256] = { 0 };
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int matched_if = ifname ? 0 : 1;
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for( i = 0, len = strlen(buf); i < len; i++ )
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{
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if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
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{
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ln++;
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}
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else if (!lkey[0] && (buf[i] == '='))
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{
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if ((&buf[i] - ln) > 0)
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memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
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}
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else if (buf[i] == '\n')
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{
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if (lkey[0])
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{
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memcpy(lval, ln + strlen(lkey) + 1,
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min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
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if ((ifname != NULL) &&
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(!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
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{
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matched_if = !strcmp(lval, ifname);
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}
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else if (matched_if && !strcmp(lkey, key))
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{
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return lval;
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}
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}
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ln = &buf[i+1];
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memset(lkey, 0, sizeof(lkey));
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memset(lval, 0, sizeof(lval));
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}
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}
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return NULL;
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}
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static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
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{
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char *buf = arg;
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struct nlattr **attr = nl80211_parse(msg);
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if (attr[NL80211_ATTR_WIPHY_NAME])
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memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
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nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
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else
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buf[0] = 0;
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return NL_SKIP;
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}
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static char * nl80211_ifname2phy(const char *ifname)
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{
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static char phy[32] = { 0 };
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struct nl80211_msg_conveyor *req;
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memset(phy, 0, sizeof(phy));
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req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
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if (req)
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{
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nl80211_send(req, nl80211_ifname2phy_cb, phy);
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nl80211_free(req);
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}
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return phy[0] ? phy : NULL;
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}
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static char * nl80211_hostapd_info(const char *ifname)
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{
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char *phy;
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char path[32] = { 0 };
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static char buf[4096] = { 0 };
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FILE *conf;
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if ((phy = nl80211_ifname2phy(ifname)) != NULL)
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{
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snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
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if ((conf = fopen(path, "r")) != NULL)
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{
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fread(buf, sizeof(buf) - 1, 1, conf);
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fclose(conf);
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|
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return buf;
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}
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}
|
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return NULL;
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}
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|
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static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
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{
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fd_set rfds;
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struct timeval tv = { 2, 0 };
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|
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FD_ZERO(&rfds);
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FD_SET(sock, &rfds);
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memset(buf, 0, blen);
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|
|
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if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
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return -1;
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|
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if (!FD_ISSET(sock, &rfds))
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return -1;
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|
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return recv(sock, buf, blen, 0);
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}
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|
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static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
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const char *event)
|
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{
|
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int numtry = 0;
|
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int sock = -1;
|
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char *rv = NULL;
|
|
size_t remote_length, local_length;
|
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static char buffer[10240] = { 0 };
|
|
|
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struct sockaddr_un local = { 0 };
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struct sockaddr_un remote = { 0 };
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|
|
|
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sock = socket(PF_UNIX, SOCK_DGRAM, 0);
|
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if (sock < 0)
|
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return NULL;
|
|
|
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remote.sun_family = AF_UNIX;
|
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remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
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"/var/run/wpa_supplicant-%s/%s", ifname, ifname);
|
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|
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if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
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goto out;
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|
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if (connect(sock, (struct sockaddr *) &remote, remote_length))
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goto out;
|
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local.sun_family = AF_UNIX;
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local_length = sizeof(local.sun_family) +
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sprintf(local.sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
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|
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if (bind(sock, (struct sockaddr *) &local, local_length))
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goto out;
|
|
|
|
|
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if (event)
|
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{
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send(sock, "ATTACH", 6, 0);
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|
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if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
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goto out;
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}
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|
|
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send(sock, cmd, strlen(cmd), 0);
|
|
|
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while( numtry++ < 5 )
|
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{
|
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if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
|
|
{
|
|
if (event)
|
|
continue;
|
|
|
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break;
|
|
}
|
|
|
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if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
|
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break;
|
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}
|
|
|
|
rv = buffer;
|
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|
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out:
|
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close(sock);
|
|
|
|
if (local.sun_family)
|
|
unlink(local.sun_path);
|
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|
|
return rv;
|
|
}
|
|
|
|
static inline int nl80211_readint(const char *path)
|
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{
|
|
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->nlctrl)
|
|
genl_family_put(nls->nlctrl);
|
|
|
|
if (nls->nl80211)
|
|
genl_family_put(nls->nl80211);
|
|
|
|
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, int *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];
|
|
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_PACKETS] = { .type = NLA_U32 },
|
|
[NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
|
|
[NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
|
|
[NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
|
|
[NL80211_STA_INFO_SIGNAL] = { .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 },
|
|
};
|
|
|
|
/* advance to end of array */
|
|
e += arr->count;
|
|
memset(e, 0, sizeof(*e));
|
|
|
|
if (attr[NL80211_ATTR_MAC])
|
|
memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
|
|
|
|
if (attr[NL80211_ATTR_STA_INFO] &&
|
|
!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]);
|
|
|
|
if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
|
|
e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
|
|
|
|
if (sinfo[NL80211_STA_INFO_RX_PACKETS])
|
|
e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
|
|
|
|
if (sinfo[NL80211_STA_INFO_TX_PACKETS])
|
|
e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
|
|
|
|
if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
|
|
!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
|
|
sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
|
|
{
|
|
if (rinfo[NL80211_RATE_INFO_BITRATE])
|
|
e->rx_rate.rate =
|
|
nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
|
|
|
|
if (rinfo[NL80211_RATE_INFO_MCS])
|
|
e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
|
|
|
|
if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
|
|
e->rx_rate.is_40mhz = 1;
|
|
|
|
if (rinfo[NL80211_RATE_INFO_SHORT_GI])
|
|
e->rx_rate.is_short_gi = 1;
|
|
}
|
|
|
|
if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
|
|
!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
|
|
sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
|
|
{
|
|
if (rinfo[NL80211_RATE_INFO_BITRATE])
|
|
e->tx_rate.rate =
|
|
nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
|
|
|
|
if (rinfo[NL80211_RATE_INFO_MCS])
|
|
e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
|
|
|
|
if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
|
|
e->tx_rate.is_40mhz = 1;
|
|
|
|
if (rinfo[NL80211_RATE_INFO_SHORT_GI])
|
|
e->tx_rate.is_short_gi = 1;
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
|
|
struct nl80211_scanlist {
|
|
struct iwinfo_scanlist_entry *e;
|
|
int len;
|
|
};
|
|
|
|
|
|
static void nl80211_get_scanlist_ie(struct nlattr **bss,
|
|
struct iwinfo_scanlist_entry *e)
|
|
{
|
|
int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
|
|
unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
|
|
static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
|
|
|
|
while (ielen >= 2 && ielen >= ie[1])
|
|
{
|
|
switch (ie[0])
|
|
{
|
|
case 0: /* SSID */
|
|
memcpy(e->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
|
|
break;
|
|
|
|
case 48: /* RSN */
|
|
iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
|
|
IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
|
|
break;
|
|
|
|
case 221: /* Vendor */
|
|
if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
|
|
iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
|
|
IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
|
|
break;
|
|
}
|
|
|
|
ielen -= ie[1] + 2;
|
|
ie += ie[1] + 2;
|
|
}
|
|
}
|
|
|
|
static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
|
|
{
|
|
int8_t rssi;
|
|
uint16_t caps;
|
|
|
|
struct nl80211_scanlist *sl = arg;
|
|
struct nlattr **tb = nl80211_parse(msg);
|
|
struct nlattr *bss[NL80211_BSS_MAX + 1];
|
|
|
|
static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
|
|
[NL80211_BSS_TSF] = { .type = NLA_U64 },
|
|
[NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
|
|
[NL80211_BSS_BSSID] = { },
|
|
[NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
|
|
[NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
|
|
[NL80211_BSS_INFORMATION_ELEMENTS] = { },
|
|
[NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
|
|
[NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
|
|
[NL80211_BSS_STATUS] = { .type = NLA_U32 },
|
|
[NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
|
|
[NL80211_BSS_BEACON_IES] = { },
|
|
};
|
|
|
|
if (!tb[NL80211_ATTR_BSS] ||
|
|
nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
|
|
bss_policy) ||
|
|
!bss[NL80211_BSS_BSSID])
|
|
{
|
|
return NL_SKIP;
|
|
}
|
|
|
|
if (bss[NL80211_BSS_CAPABILITY])
|
|
caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
|
|
else
|
|
caps = 0;
|
|
|
|
memset(sl->e, 0, sizeof(*sl->e));
|
|
memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
|
|
|
|
if (caps & (1<<1))
|
|
sl->e->mode = IWINFO_OPMODE_ADHOC;
|
|
else
|
|
sl->e->mode = IWINFO_OPMODE_MASTER;
|
|
|
|
if (caps & (1<<4))
|
|
sl->e->crypto.enabled = 1;
|
|
|
|
if (bss[NL80211_BSS_FREQUENCY])
|
|
sl->e->channel = nl80211_freq2channel(nla_get_u32(
|
|
bss[NL80211_BSS_FREQUENCY]));
|
|
|
|
if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
|
|
nl80211_get_scanlist_ie(bss, sl->e);
|
|
|
|
if (bss[NL80211_BSS_SIGNAL_MBM])
|
|
{
|
|
sl->e->signal =
|
|
(uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
|
|
|
|
rssi = sl->e->signal - 0x100;
|
|
|
|
if (rssi < -110)
|
|
rssi = -110;
|
|
else if (rssi > -40)
|
|
rssi = -40;
|
|
|
|
sl->e->quality = (rssi + 110);
|
|
sl->e->quality_max = 70;
|
|
}
|
|
|
|
if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
|
|
{
|
|
sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
|
|
sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
|
|
}
|
|
|
|
sl->e++;
|
|
sl->len++;
|
|
|
|
return NL_SKIP;
|
|
}
|
|
|
|
static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
|
|
{
|
|
struct nl80211_msg_conveyor *req;
|
|
struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
|
|
|
|
req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
|
|
if (req)
|
|
{
|
|
nl80211_send(req, NULL, NULL);
|
|
nl80211_free(req);
|
|
}
|
|
|
|
nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
|
|
|
|
req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
|
|
if (req)
|
|
{
|
|
nl80211_send(req, nl80211_get_scanlist_cb, &sl);
|
|
nl80211_free(req);
|
|
}
|
|
|
|
*len = sl.len * sizeof(struct iwinfo_scanlist_entry);
|
|
return *len ? 0 : -1;
|
|
}
|
|
|
|
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) */
|
|
e->mode = IWINFO_OPMODE_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;
|
|
|
|
nl80211_get_scanlist_nl(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))
|
|
{
|
|
nl80211_get_scanlist_nl(res, buf, len);
|
|
iwinfo_ifdown(res);
|
|
}
|
|
|
|
/* driver cannot create secondary interface, take down ap
|
|
* during scan */
|
|
else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
|
|
{
|
|
nl80211_get_scanlist_nl(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;
|
|
}
|
|
|
|
int nl80211_get_hardware_id(const char *ifname, char *buf)
|
|
{
|
|
int rv;
|
|
char *res;
|
|
|
|
/* 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)
|
|
{
|
|
rv = wext_get_hardware_id(res, buf);
|
|
}
|
|
|
|
/* Need to spawn a temporary iface for finding IDs */
|
|
else if ((res = nl80211_ifadd(ifname)) != NULL)
|
|
{
|
|
rv = wext_get_hardware_id(res, buf);
|
|
nl80211_ifdel(res);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
rv = wext_get_hardware_id(ifname, buf);
|
|
}
|
|
|
|
/* Failed to obtain hardware IDs, search board config */
|
|
if (rv)
|
|
{
|
|
rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
static const struct iwinfo_hardware_entry *
|
|
nl80211_get_hardware_entry(const char *ifname)
|
|
{
|
|
struct iwinfo_hardware_id id;
|
|
|
|
if (nl80211_get_hardware_id(ifname, (char *)&id))
|
|
return NULL;
|
|
|
|
return iwinfo_hardware(&id);
|
|
}
|
|
|
|
int nl80211_get_hardware_name(const char *ifname, char *buf)
|
|
{
|
|
const struct iwinfo_hardware_entry *hw;
|
|
|
|
if (!(hw = nl80211_get_hardware_entry(ifname)))
|
|
sprintf(buf, "Generic MAC80211");
|
|
else
|
|
sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nl80211_get_txpower_offset(const char *ifname, int *buf)
|
|
{
|
|
const struct iwinfo_hardware_entry *hw;
|
|
|
|
if (!(hw = nl80211_get_hardware_entry(ifname)))
|
|
return -1;
|
|
|
|
*buf = hw->txpower_offset;
|
|
return 0;
|
|
}
|
|
|
|
int nl80211_get_frequency_offset(const char *ifname, int *buf)
|
|
{
|
|
const struct iwinfo_hardware_entry *hw;
|
|
|
|
if (!(hw = nl80211_get_hardware_entry(ifname)))
|
|
return -1;
|
|
|
|
*buf = hw->frequency_offset;
|
|
return 0;
|
|
}
|