2 * iwinfo - Wireless Information Library - NL80211 Backend
4 * Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
6 * The iwinfo library is free software: you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
10 * The iwinfo library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 * See the GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with the iwinfo library. If not, see http://www.gnu.org/licenses/.
18 * The signal handling code is derived from the official madwifi tools,
19 * wlanconfig.c in particular. The encryption property handling was
20 * inspired by the hostapd madwifi driver.
22 * Parts of this code are derived from the Linux iw utility.
26 #include "iwinfo_nl80211.h"
28 #define min(x, y) ((x) < (y)) ? (x) : (y)
30 static struct nl80211_state *nls = NULL;
32 static void nl80211_close(void)
37 genl_family_put(nls->nlctrl);
40 genl_family_put(nls->nl80211);
43 nl_socket_free(nls->nl_sock);
46 nl_cache_free(nls->nl_cache);
53 static int nl80211_init(void)
59 nls = malloc(sizeof(struct nl80211_state));
65 memset(nls, 0, sizeof(*nls));
67 nls->nl_sock = nl_socket_alloc();
73 if (genl_connect(nls->nl_sock)) {
78 fd = nl_socket_get_fd(nls->nl_sock);
79 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
84 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
89 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
95 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
110 static int nl80211_readint(const char *path)
116 if ((fd = open(path, O_RDONLY)) > -1)
118 if (read(fd, buffer, sizeof(buffer)) > 0)
128 static int nl80211_msg_error(struct sockaddr_nl *nla,
129 struct nlmsgerr *err, void *arg)
136 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
143 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
150 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
155 static void nl80211_free(struct nl80211_msg_conveyor *cv)
170 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
173 static struct nl80211_msg_conveyor cv;
175 struct nl_msg *req = NULL;
176 struct nl_cb *cb = NULL;
182 cb = nl_cb_alloc(NL_CB_DEFAULT);
186 genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
204 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
206 if (nl80211_init() < 0)
209 return nl80211_new(nls->nlctrl, cmd, flags);
212 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
215 int ifidx = -1, phyidx = -1;
216 struct nl80211_msg_conveyor *cv;
221 if (nl80211_init() < 0)
224 if (!strncmp(ifname, "phy", 3))
225 phyidx = atoi(&ifname[3]);
226 else if (!strncmp(ifname, "radio", 5))
227 phyidx = atoi(&ifname[5]);
228 else if (!strncmp(ifname, "mon.", 4))
229 ifidx = if_nametoindex(&ifname[4]);
231 ifidx = if_nametoindex(ifname);
233 /* Valid ifidx must be greater than 0 */
234 if ((ifidx <= 0) && (phyidx < 0))
237 cv = nl80211_new(nls->nl80211, cmd, flags);
242 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
245 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
254 static struct nl80211_msg_conveyor * nl80211_send(
255 struct nl80211_msg_conveyor *cv,
256 int (*cb_func)(struct nl_msg *, void *), void *cb_arg
258 static struct nl80211_msg_conveyor rcv;
262 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
264 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
266 if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
269 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
270 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
271 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
274 nl_recvmsgs(nls->nl_sock, cv->cb);
285 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
287 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
288 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
290 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
291 genlmsg_attrlen(gnlh, 0), NULL);
297 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
299 struct nl80211_group_conveyor *cv = arg;
301 struct nlattr **attr = nl80211_parse(msg);
302 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
306 if (!attr[CTRL_ATTR_MCAST_GROUPS])
309 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
311 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
312 nla_data(mgrp), nla_len(mgrp), NULL);
314 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
315 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
316 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
317 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
319 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
327 static int nl80211_subscribe(const char *family, const char *group)
329 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
330 struct nl80211_msg_conveyor *req;
332 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
335 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
336 nl80211_send(req, nl80211_subscribe_cb, &cv);
342 return nl_socket_add_membership(nls->nl_sock, cv.id);
346 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
348 struct nl80211_event_conveyor *cv = arg;
349 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
351 if (gnlh->cmd == cv->wait)
352 cv->recv = gnlh->cmd;
357 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
362 static int nl80211_wait(const char *family, const char *group, int cmd)
364 struct nl80211_event_conveyor cv = { .wait = cmd };
367 if (nl80211_subscribe(family, group))
370 cb = nl_cb_alloc(NL_CB_DEFAULT);
375 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
376 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
379 nl_recvmsgs(nls->nl_sock, cb);
387 static int nl80211_freq2channel(int freq)
391 else if (freq < 2484)
392 return (freq - 2407) / 5;
393 else if (freq >= 4910 && freq <= 4980)
394 return (freq - 4000) / 5;
396 return (freq - 5000) / 5;
399 static int nl80211_channel2freq(int channel, const char *band)
401 if (!band || band[0] != 'a')
405 else if (channel < 14)
406 return (channel * 5) + 2407;
410 if (channel >= 182 && channel <= 196)
411 return (channel * 5) + 4000;
413 return (channel * 5) + 5000;
419 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
422 char lkey[64] = { 0 };
423 const char *ln = buf;
424 static char lval[256] = { 0 };
426 int matched_if = ifname ? 0 : 1;
429 for( i = 0, len = strlen(buf); i < len; i++ )
431 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
435 else if (!lkey[0] && (buf[i] == '='))
437 if ((&buf[i] - ln) > 0)
438 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
440 else if (buf[i] == '\n')
444 memcpy(lval, ln + strlen(lkey) + 1,
445 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
447 if ((ifname != NULL) &&
448 (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
450 matched_if = !strcmp(lval, ifname);
452 else if (matched_if && !strcmp(lkey, key))
459 memset(lkey, 0, sizeof(lkey));
460 memset(lval, 0, sizeof(lval));
467 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
470 struct nlattr **attr = nl80211_parse(msg);
472 if (attr[NL80211_ATTR_WIPHY_NAME])
473 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
474 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
481 static char * nl80211_ifname2phy(const char *ifname)
483 static char phy[32] = { 0 };
484 struct nl80211_msg_conveyor *req;
486 memset(phy, 0, sizeof(phy));
488 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
491 nl80211_send(req, nl80211_ifname2phy_cb, phy);
495 return phy[0] ? phy : NULL;
498 static char * nl80211_phy2ifname(const char *ifname)
500 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
502 static char nif[IFNAMSIZ] = { 0 };
507 /* Only accept phy name of the form phy%d or radio%d */
510 else if (!strncmp(ifname, "phy", 3))
511 phyidx = atoi(&ifname[3]);
512 else if (!strncmp(ifname, "radio", 5))
513 phyidx = atoi(&ifname[5]);
517 memset(nif, 0, sizeof(nif));
521 if ((d = opendir("/sys/class/net")) != NULL)
523 while ((e = readdir(d)) != NULL)
525 snprintf(buffer, sizeof(buffer),
526 "/sys/class/net/%s/phy80211/index", e->d_name);
528 if (nl80211_readint(buffer) == phyidx)
530 snprintf(buffer, sizeof(buffer),
531 "/sys/class/net/%s/ifindex", e->d_name);
533 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
534 ((ifidx < 0) || (cifidx < ifidx)))
537 strncpy(nif, e->d_name, sizeof(nif));
546 return nif[0] ? nif : NULL;
549 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
552 struct nlattr **tb = nl80211_parse(msg);
553 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
554 IWINFO_OPMODE_UNKNOWN, /* unspecified */
555 IWINFO_OPMODE_ADHOC, /* IBSS */
556 IWINFO_OPMODE_CLIENT, /* managed */
557 IWINFO_OPMODE_MASTER, /* AP */
558 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
559 IWINFO_OPMODE_WDS, /* WDS */
560 IWINFO_OPMODE_MONITOR, /* monitor */
561 IWINFO_OPMODE_MESHPOINT, /* mesh point */
562 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
563 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
566 if (tb[NL80211_ATTR_IFTYPE])
567 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
573 static int nl80211_get_mode(const char *ifname, int *buf)
576 struct nl80211_msg_conveyor *req;
578 res = nl80211_phy2ifname(ifname);
579 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
580 *buf = IWINFO_OPMODE_UNKNOWN;
584 nl80211_send(req, nl80211_get_mode_cb, buf);
588 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
591 static char * nl80211_hostapd_info(const char *ifname)
595 char path[32] = { 0 };
596 static char buf[4096] = { 0 };
599 if (nl80211_get_mode(ifname, &mode))
602 if ((mode == IWINFO_OPMODE_MASTER || mode == IWINFO_OPMODE_AP_VLAN) &&
603 (phy = nl80211_ifname2phy(ifname)) != NULL)
605 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
607 if ((conf = fopen(path, "r")) != NULL)
609 fread(buf, sizeof(buf) - 1, 1, conf);
619 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
622 struct timeval tv = { 2, 0 };
627 memset(buf, 0, blen);
630 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
633 if (!FD_ISSET(sock, &rfds))
636 return recv(sock, buf, blen, 0);
639 static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
645 size_t remote_length, local_length;
646 static char buffer[10240] = { 0 };
648 struct sockaddr_un local = { 0 };
649 struct sockaddr_un remote = { 0 };
652 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
656 remote.sun_family = AF_UNIX;
657 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
658 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
660 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
663 if (connect(sock, (struct sockaddr *) &remote, remote_length))
665 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
666 "/var/run/wpa_supplicant/%s", ifname);
668 if (connect(sock, (struct sockaddr *) &remote, remote_length))
672 local.sun_family = AF_UNIX;
673 local_length = sizeof(local.sun_family) +
674 sprintf(local.sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
676 if (bind(sock, (struct sockaddr *) &local, local_length))
682 send(sock, "ATTACH", 6, 0);
684 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
689 send(sock, cmd, strlen(cmd), 0);
691 /* we might have to scan up to 72 channels / 256ms per channel */
692 /* this makes up to 18.5s hence 10 tries */
693 while( numtry++ < 10 )
697 /* make sure there is a terminating nul byte */
698 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
706 if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
709 /* there may be more than max(numtry) BSS-ADDED events */
710 /* ignore them similar to wpa_cli */
711 if (buffer[0] == '<' &&
712 (bracket=strchr(buffer,'>')) != NULL &&
713 strncmp(bracket+1,"CTRL-EVENT-BSS-ADDED",20) == 0)
722 if (local.sun_family)
723 unlink(local.sun_path);
728 static char * nl80211_ifadd(const char *ifname)
731 char *rv = NULL, path[PATH_MAX];
732 static char nif[IFNAMSIZ] = { 0 };
733 struct nl80211_msg_conveyor *req, *res;
736 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
739 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
741 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
742 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
744 nl80211_send(req, NULL, NULL);
746 snprintf(path, sizeof(path) - 1,
747 "/proc/sys/net/ipv6/conf/%s/disable_ipv6", nif);
749 if ((sysfs = fopen(path, "w")) != NULL)
751 fwrite("0\n", 1, 2, sysfs);
764 static void nl80211_ifdel(const char *ifname)
766 struct nl80211_msg_conveyor *req;
768 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
771 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
773 nl80211_send(req, NULL, NULL);
780 static void nl80211_hostapd_hup(const char *ifname)
784 char *phy = nl80211_ifname2phy(ifname);
788 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
789 if ((fd = open(buf, O_RDONLY)) > 0)
791 if (read(fd, buf, sizeof(buf)) > 0)
803 static int nl80211_probe(const char *ifname)
805 return !!nl80211_ifname2phy(ifname);
808 struct nl80211_ssid_bssid {
810 unsigned char bssid[7];
813 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
817 struct nl80211_ssid_bssid *sb = arg;
818 struct nlattr **tb = nl80211_parse(msg);
819 struct nlattr *bss[NL80211_BSS_MAX + 1];
821 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
822 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
823 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
826 if (!tb[NL80211_ATTR_BSS] ||
827 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
829 !bss[NL80211_BSS_BSSID] ||
830 !bss[NL80211_BSS_STATUS] ||
831 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
836 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
838 case NL80211_BSS_STATUS_ASSOCIATED:
839 case NL80211_BSS_STATUS_AUTHENTICATED:
840 case NL80211_BSS_STATUS_IBSS_JOINED:
844 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
845 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
847 while (ielen >= 2 && ielen >= ie[1])
851 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
862 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
871 static int nl80211_get_ssid(const char *ifname, char *buf)
874 struct nl80211_msg_conveyor *req;
875 struct nl80211_ssid_bssid sb;
877 /* try to find ssid from scan dump results */
878 res = nl80211_phy2ifname(ifname);
879 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
886 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
890 /* failed, try to find from hostapd info */
892 (res = nl80211_hostapd_info(ifname)) &&
893 (res = nl80211_getval(ifname, res, "ssid")))
895 memcpy(buf, res, strlen(res));
898 return (*buf == 0) ? -1 : 0;
901 static int nl80211_get_bssid(const char *ifname, char *buf)
904 struct nl80211_msg_conveyor *req;
905 struct nl80211_ssid_bssid sb;
907 /* try to find bssid from scan dump results */
908 res = nl80211_phy2ifname(ifname);
909 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
916 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
920 /* failed, try to find mac from hostapd info */
921 if ((sb.bssid[0] == 0) &&
922 (res = nl80211_hostapd_info(ifname)) &&
923 (res = nl80211_getval(ifname, res, "bssid")))
926 sb.bssid[1] = strtol(&res[0], NULL, 16);
927 sb.bssid[2] = strtol(&res[3], NULL, 16);
928 sb.bssid[3] = strtol(&res[6], NULL, 16);
929 sb.bssid[4] = strtol(&res[9], NULL, 16);
930 sb.bssid[5] = strtol(&res[12], NULL, 16);
931 sb.bssid[6] = strtol(&res[15], NULL, 16);
936 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
937 sb.bssid[1], sb.bssid[2], sb.bssid[3],
938 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
947 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
950 struct nlattr **attr = nl80211_parse(msg);
951 struct nlattr *binfo[NL80211_BSS_MAX + 1];
953 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
954 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
955 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
958 if (attr[NL80211_ATTR_BSS] &&
959 !nla_parse_nested(binfo, NL80211_BSS_MAX,
960 attr[NL80211_ATTR_BSS], bss_policy))
962 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
963 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
969 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
972 struct nlattr **tb = nl80211_parse(msg);
974 if (tb[NL80211_ATTR_WIPHY_FREQ])
975 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
980 static int nl80211_get_frequency(const char *ifname, int *buf)
984 struct nl80211_msg_conveyor *req;
986 /* try to find frequency from interface info */
987 res = nl80211_phy2ifname(ifname);
988 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
993 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
997 /* failed, try to find frequency from hostapd info */
999 (res = nl80211_hostapd_info(ifname)) &&
1000 (channel = nl80211_getval(NULL, res, "channel")))
1002 chn = atoi(channel);
1003 *buf = nl80211_channel2freq(chn, nl80211_getval(NULL, res, "hw_mode"));
1007 /* failed, try to find frequency from scan results */
1010 res = nl80211_phy2ifname(ifname);
1011 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN,
1016 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
1022 return (*buf == 0) ? -1 : 0;
1025 static int nl80211_get_channel(const char *ifname, int *buf)
1027 if (!nl80211_get_frequency(ifname, buf))
1029 *buf = nl80211_freq2channel(*buf);
1037 static int nl80211_get_txpower(const char *ifname, int *buf)
1041 char path[PATH_MAX];
1043 res = nl80211_ifname2phy(ifname);
1044 snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1045 res ? res : ifname);
1047 if ((*buf = nl80211_readint(path)) > -1)
1051 return wext_ops.txpower(ifname, buf);
1055 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1059 struct nl80211_rssi_rate *rr = arg;
1060 struct nlattr **attr = nl80211_parse(msg);
1061 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1062 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1064 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1065 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1066 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1067 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1068 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1069 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1070 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1071 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1072 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1073 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1074 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1077 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1078 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1079 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1080 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1081 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1084 if (attr[NL80211_ATTR_STA_INFO])
1086 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1087 attr[NL80211_ATTR_STA_INFO], stats_policy))
1089 if (sinfo[NL80211_STA_INFO_SIGNAL])
1091 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1092 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1095 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1097 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1098 sinfo[NL80211_STA_INFO_TX_BITRATE],
1101 if (rinfo[NL80211_RATE_INFO_BITRATE])
1103 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1105 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1115 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1119 struct nl80211_msg_conveyor *req;
1124 if ((d = opendir("/sys/class/net")) != NULL)
1126 while ((de = readdir(d)) != NULL)
1128 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1129 (!de->d_name[strlen(ifname)] ||
1130 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1132 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1137 nl80211_send(req, nl80211_fill_signal_cb, r);
1147 static int nl80211_get_bitrate(const char *ifname, int *buf)
1149 struct nl80211_rssi_rate rr;
1151 nl80211_fill_signal(ifname, &rr);
1155 *buf = (rr.rate * 100);
1162 static int nl80211_get_signal(const char *ifname, int *buf)
1164 struct nl80211_rssi_rate rr;
1166 nl80211_fill_signal(ifname, &rr);
1177 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1179 int8_t *noise = arg;
1180 struct nlattr **tb = nl80211_parse(msg);
1181 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1183 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1184 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1185 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1188 if (!tb[NL80211_ATTR_SURVEY_INFO])
1191 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1192 tb[NL80211_ATTR_SURVEY_INFO], sp))
1195 if (!si[NL80211_SURVEY_INFO_NOISE])
1198 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1199 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1205 static int nl80211_get_noise(const char *ifname, int *buf)
1208 struct nl80211_msg_conveyor *req;
1210 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1215 nl80211_send(req, nl80211_get_noise_cb, &noise);
1228 static int nl80211_get_quality(const char *ifname, int *buf)
1232 if (!nl80211_get_signal(ifname, &signal))
1234 /* A positive signal level is usually just a quality
1235 * value, pass through as-is */
1241 /* The cfg80211 wext compat layer assumes a signal range
1242 * of -110 dBm to -40 dBm, the quality value is derived
1243 * by adding 110 to the signal level */
1248 else if (signal > -40)
1251 *buf = (signal + 110);
1260 static int nl80211_get_quality_max(const char *ifname, int *buf)
1262 /* The cfg80211 wext compat layer assumes a maximum
1269 static int nl80211_get_encryption(const char *ifname, char *buf)
1274 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1276 /* WPA supplicant */
1277 if ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
1278 (val = nl80211_getval(NULL, res, "pairwise_cipher")))
1281 if (strstr(val, "WEP"))
1283 if (strstr(val, "WEP-40"))
1284 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1286 else if (strstr(val, "WEP-104"))
1287 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1290 c->group_ciphers = c->pair_ciphers;
1292 c->auth_suites |= IWINFO_KMGMT_NONE;
1293 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1299 if (strstr(val, "TKIP"))
1300 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1302 else if (strstr(val, "CCMP"))
1303 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1305 else if (strstr(val, "NONE"))
1306 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1308 else if (strstr(val, "WEP-40"))
1309 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1311 else if (strstr(val, "WEP-104"))
1312 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1315 if ((val = nl80211_getval(NULL, res, "group_cipher")))
1317 if (strstr(val, "TKIP"))
1318 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1320 else if (strstr(val, "CCMP"))
1321 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1323 else if (strstr(val, "NONE"))
1324 c->group_ciphers |= IWINFO_CIPHER_NONE;
1326 else if (strstr(val, "WEP-40"))
1327 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1329 else if (strstr(val, "WEP-104"))
1330 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1334 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
1336 if (strstr(val, "WPA2"))
1339 else if (strstr(val, "WPA"))
1343 if (strstr(val, "PSK"))
1344 c->auth_suites |= IWINFO_KMGMT_PSK;
1346 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
1347 c->auth_suites |= IWINFO_KMGMT_8021x;
1349 else if (strstr(val, "NONE"))
1350 c->auth_suites |= IWINFO_KMGMT_NONE;
1353 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1360 else if ((res = nl80211_hostapd_info(ifname)))
1362 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
1363 c->wpa_version = atoi(val);
1365 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
1367 if (!val || strstr(val, "PSK"))
1368 c->auth_suites |= IWINFO_KMGMT_PSK;
1370 if (val && strstr(val, "EAP"))
1371 c->auth_suites |= IWINFO_KMGMT_8021x;
1373 if (val && strstr(val, "NONE"))
1374 c->auth_suites |= IWINFO_KMGMT_NONE;
1376 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
1378 if (strstr(val, "TKIP"))
1379 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1381 if (strstr(val, "CCMP"))
1382 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1384 if (strstr(val, "NONE"))
1385 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1388 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1392 c->auth_algs |= IWINFO_AUTH_OPEN;
1396 c->auth_algs |= IWINFO_AUTH_SHARED;
1400 c->auth_algs |= IWINFO_AUTH_OPEN;
1401 c->auth_algs |= IWINFO_AUTH_SHARED;
1408 for (i = 0; i < 4; i++)
1410 snprintf(k, sizeof(k), "wep_key%d", i);
1412 if ((val = nl80211_getval(ifname, res, k)))
1414 if ((strlen(val) == 5) || (strlen(val) == 10))
1415 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1417 else if ((strlen(val) == 13) || (strlen(val) == 26))
1418 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1423 c->group_ciphers = c->pair_ciphers;
1424 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1432 static int nl80211_get_phyname(const char *ifname, char *buf)
1436 name = nl80211_ifname2phy(ifname);
1443 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1445 name = nl80211_ifname2phy(name);
1449 strcpy(buf, ifname);
1458 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1460 struct nl80211_array_buf *arr = arg;
1461 struct iwinfo_assoclist_entry *e = arr->buf;
1462 struct nlattr **attr = nl80211_parse(msg);
1463 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1464 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1466 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1467 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1468 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1469 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1470 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1471 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1472 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1475 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1476 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1477 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1478 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1479 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1482 /* advance to end of array */
1484 memset(e, 0, sizeof(*e));
1486 if (attr[NL80211_ATTR_MAC])
1487 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1489 if (attr[NL80211_ATTR_STA_INFO] &&
1490 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1491 attr[NL80211_ATTR_STA_INFO], stats_policy))
1493 if (sinfo[NL80211_STA_INFO_SIGNAL])
1494 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1496 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1497 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1499 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1500 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1502 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1503 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1505 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1506 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1507 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1509 if (rinfo[NL80211_RATE_INFO_BITRATE])
1511 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1513 if (rinfo[NL80211_RATE_INFO_MCS])
1514 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1516 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1517 e->rx_rate.is_40mhz = 1;
1519 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1520 e->rx_rate.is_short_gi = 1;
1523 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1524 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1525 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1527 if (rinfo[NL80211_RATE_INFO_BITRATE])
1529 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1531 if (rinfo[NL80211_RATE_INFO_MCS])
1532 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1534 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1535 e->tx_rate.is_40mhz = 1;
1537 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1538 e->tx_rate.is_short_gi = 1;
1542 e->noise = 0; /* filled in by caller */
1548 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1553 struct nl80211_msg_conveyor *req;
1554 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1555 struct iwinfo_assoclist_entry *e;
1557 if ((d = opendir("/sys/class/net")) != NULL)
1559 while ((de = readdir(d)) != NULL)
1561 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1562 (!de->d_name[strlen(ifname)] ||
1563 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1565 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1570 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1578 if (!nl80211_get_noise(ifname, &noise))
1579 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1582 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1589 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1592 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1594 struct nlattr **attr = nl80211_parse(msg);
1595 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1596 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1597 struct nlattr *band, *freq;
1599 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1600 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1601 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1602 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1603 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1604 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1605 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1608 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1611 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1613 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1614 nla_len(band), NULL);
1616 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1618 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1619 nla_data(freq), nla_len(freq), freq_policy);
1621 ch_cmp = nl80211_freq2channel(nla_get_u32(
1622 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1624 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1625 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1627 *dbm_max = (int)(0.01 * nla_get_u32(
1628 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1638 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1641 int dbm_max = -1, dbm_cur, dbm_cnt;
1642 struct nl80211_msg_conveyor *req;
1643 struct iwinfo_txpwrlist_entry entry;
1645 if (nl80211_get_channel(ifname, &ch_cur))
1648 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1651 /* initialize the value pointer with channel for callback */
1654 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1660 for (dbm_cur = 0, dbm_cnt = 0;
1662 dbm_cur++, dbm_cnt++)
1664 entry.dbm = dbm_cur;
1665 entry.mw = iwinfo_dbm2mw(dbm_cur);
1667 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1670 entry.dbm = dbm_max;
1671 entry.mw = iwinfo_dbm2mw(dbm_max);
1673 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1676 *len = dbm_cnt * sizeof(entry);
1683 static void nl80211_get_scancrypto(const char *spec,
1684 struct iwinfo_crypto_entry *c)
1686 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1690 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1693 else if (strstr(spec, "WPA2"))
1696 else if (strstr(spec, "WPA"))
1699 else if (strstr(spec, "WEP"))
1700 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1703 if (strstr(spec, "PSK"))
1704 c->auth_suites |= IWINFO_KMGMT_PSK;
1706 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1707 c->auth_suites |= IWINFO_KMGMT_8021x;
1709 if (strstr(spec, "WPA-NONE"))
1710 c->auth_suites |= IWINFO_KMGMT_NONE;
1713 if (strstr(spec, "TKIP"))
1714 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1716 if (strstr(spec, "CCMP"))
1717 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1719 if (strstr(spec, "WEP-40"))
1720 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1722 if (strstr(spec, "WEP-104"))
1723 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1725 c->group_ciphers = c->pair_ciphers;
1734 struct nl80211_scanlist {
1735 struct iwinfo_scanlist_entry *e;
1740 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1741 struct iwinfo_scanlist_entry *e)
1743 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1744 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1745 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1748 while (ielen >= 2 && ielen >= ie[1])
1753 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
1754 memcpy(e->ssid, ie + 2, len);
1759 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1760 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1763 case 221: /* Vendor */
1764 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1765 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1766 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1775 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1780 struct nl80211_scanlist *sl = arg;
1781 struct nlattr **tb = nl80211_parse(msg);
1782 struct nlattr *bss[NL80211_BSS_MAX + 1];
1784 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1785 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1786 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1787 [NL80211_BSS_BSSID] = { },
1788 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1789 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1790 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
1791 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1792 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1793 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1794 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1795 [NL80211_BSS_BEACON_IES] = { },
1798 if (!tb[NL80211_ATTR_BSS] ||
1799 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1801 !bss[NL80211_BSS_BSSID])
1806 if (bss[NL80211_BSS_CAPABILITY])
1807 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1811 memset(sl->e, 0, sizeof(*sl->e));
1812 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
1815 sl->e->mode = IWINFO_OPMODE_ADHOC;
1816 else if (caps & (1<<0))
1817 sl->e->mode = IWINFO_OPMODE_MASTER;
1819 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
1822 sl->e->crypto.enabled = 1;
1824 if (bss[NL80211_BSS_FREQUENCY])
1825 sl->e->channel = nl80211_freq2channel(nla_get_u32(
1826 bss[NL80211_BSS_FREQUENCY]));
1828 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
1829 nl80211_get_scanlist_ie(bss, sl->e);
1831 if (bss[NL80211_BSS_SIGNAL_MBM])
1834 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
1836 rssi = sl->e->signal - 0x100;
1840 else if (rssi > -40)
1843 sl->e->quality = (rssi + 110);
1844 sl->e->quality_max = 70;
1847 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
1849 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1850 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
1859 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
1861 struct nl80211_msg_conveyor *req;
1862 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
1864 req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
1867 nl80211_send(req, NULL, NULL);
1871 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
1873 req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1876 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
1880 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
1881 return *len ? 0 : -1;
1884 static int wpasupp_ssid_decode(const char *in, char *out, int outlen)
1887 (((x) >= 'a') ? ((x) - 'a' + 10) : \
1888 (((x) >= 'A') ? ((x) - 'A' + 10) : ((x) - '0')))
1894 if (len + 1 >= outlen)
1904 out[len++] = '\n'; in++;
1908 out[len++] = '\r'; in++;
1912 out[len++] = '\t'; in++;
1916 out[len++] = '\e'; in++;
1920 if (isxdigit(*(in+1)) && isxdigit(*(in+2)))
1921 out[len++] = hex(*(in+1)) * 16 + hex(*(in+2));
1943 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1945 int freq, rssi, qmax, count, mode;
1947 char ssid[129] = { 0 };
1948 char bssid[18] = { 0 };
1949 char cipher[256] = { 0 };
1951 /* Got a radioX pseudo interface, find some interface on it or create one */
1952 if (!strncmp(ifname, "radio", 5))
1954 /* Reuse existing interface */
1955 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1957 return nl80211_get_scanlist(res, buf, len);
1960 /* Need to spawn a temporary iface for scanning */
1961 else if ((res = nl80211_ifadd(ifname)) != NULL)
1963 count = nl80211_get_scanlist(res, buf, len);
1969 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1971 /* WPA supplicant */
1972 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1974 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1976 nl80211_get_quality_max(ifname, &qmax);
1983 /* skip log lines */
1988 /* skip header line */
1992 if (sscanf(res, "%17s %d %d %255s%*[ \t]%128[^\n]\n",
1993 bssid, &freq, &rssi, cipher, ssid) < 5)
1995 /* skip malformed lines */
1999 e->mac[0] = strtol(&bssid[0], NULL, 16);
2000 e->mac[1] = strtol(&bssid[3], NULL, 16);
2001 e->mac[2] = strtol(&bssid[6], NULL, 16);
2002 e->mac[3] = strtol(&bssid[9], NULL, 16);
2003 e->mac[4] = strtol(&bssid[12], NULL, 16);
2004 e->mac[5] = strtol(&bssid[15], NULL, 16);
2007 wpasupp_ssid_decode(ssid, e->ssid, sizeof(e->ssid));
2009 /* Mode (assume master) */
2010 if (strstr(cipher,"[MESH]"))
2011 e->mode = IWINFO_OPMODE_MESHPOINT;
2013 e->mode = IWINFO_OPMODE_MASTER;
2016 e->channel = nl80211_freq2channel(freq);
2024 /* The cfg80211 wext compat layer assumes a signal range
2025 * of -110 dBm to -40 dBm, the quality value is derived
2026 * by adding 110 to the signal level */
2029 else if (rssi > -40)
2032 e->quality = (rssi + 110);
2040 e->quality_max = qmax;
2043 nl80211_get_scancrypto(cipher, &e->crypto);
2048 memset(ssid, 0, sizeof(ssid));
2049 memset(bssid, 0, sizeof(bssid));
2050 memset(cipher, 0, sizeof(cipher));
2053 /* advance to next line */
2054 while( *res && *res++ != '\n' );
2058 *len = count * sizeof(struct iwinfo_scanlist_entry);
2063 /* station / ad-hoc / monitor scan */
2064 else if (!nl80211_get_mode(ifname, &mode) &&
2065 (mode == IWINFO_OPMODE_ADHOC ||
2066 mode == IWINFO_OPMODE_MASTER ||
2067 mode == IWINFO_OPMODE_CLIENT ||
2068 mode == IWINFO_OPMODE_MONITOR) &&
2069 iwinfo_ifup(ifname))
2071 return nl80211_get_scanlist_nl(ifname, buf, len);
2077 /* Got a temp interface, don't create yet another one */
2078 if (!strncmp(ifname, "tmp.", 4))
2080 if (!iwinfo_ifup(ifname))
2083 nl80211_get_scanlist_nl(ifname, buf, len);
2084 iwinfo_ifdown(ifname);
2088 /* Spawn a new scan interface */
2091 if (!(res = nl80211_ifadd(ifname)))
2096 /* if we can take the new interface up, the driver supports an
2097 * additional interface and there's no need to tear down the ap */
2098 if (iwinfo_ifup(res))
2100 nl80211_get_scanlist_nl(res, buf, len);
2104 /* driver cannot create secondary interface, take down ap
2106 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2108 nl80211_get_scanlist_nl(res, buf, len);
2110 iwinfo_ifup(ifname);
2111 nl80211_hostapd_hup(ifname);
2123 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2125 int bands_remain, freqs_remain;
2127 struct nl80211_array_buf *arr = arg;
2128 struct iwinfo_freqlist_entry *e = arr->buf;
2130 struct nlattr **attr = nl80211_parse(msg);
2131 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2132 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2133 struct nlattr *band, *freq;
2135 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2136 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2137 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2138 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2139 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2140 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2141 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2144 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2146 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2147 nla_data(band), nla_len(band), NULL);
2149 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2151 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2152 nla_data(freq), nla_len(freq), NULL);
2154 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2155 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2158 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2159 e->channel = nl80211_freq2channel(e->mhz);
2162 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
2163 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
2164 freqs[NL80211_FREQUENCY_ATTR_RADAR]
2175 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2177 struct nl80211_msg_conveyor *req;
2178 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2180 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2183 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2189 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2196 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2199 struct nlattr **attr = nl80211_parse(msg);
2201 if (attr[NL80211_ATTR_REG_ALPHA2])
2202 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2209 static int nl80211_get_country(const char *ifname, char *buf)
2212 struct nl80211_msg_conveyor *req;
2214 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2217 nl80211_send(req, nl80211_get_country_cb, buf);
2227 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2230 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2231 const struct iwinfo_iso3166_label *l;
2233 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2235 e->iso3166 = l->iso3166;
2236 e->ccode[0] = (l->iso3166 / 256);
2237 e->ccode[1] = (l->iso3166 % 256);
2240 *len = (count * sizeof(struct iwinfo_country_entry));
2244 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
2247 int bands_remain, freqs_remain;
2249 uint32_t vht_caps = 0;
2250 struct nlattr **attr = nl80211_parse(msg);
2251 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2252 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2253 struct nlattr *band, *freq;
2257 if (attr[NL80211_ATTR_WIPHY_BANDS])
2259 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2261 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2262 nla_data(band), nla_len(band), NULL);
2264 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2265 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2267 /* Treat any nonzero capability as 11n */
2269 *modes |= IWINFO_80211_N;
2271 if (bands[NL80211_BAND_ATTR_VHT_CAPA])
2272 vht_caps = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
2274 /* Treat any nonzero capability as 11ac */
2276 *modes |= IWINFO_80211_AC;
2278 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2281 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2282 nla_data(freq), nla_len(freq), NULL);
2284 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2287 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2289 *modes |= IWINFO_80211_B;
2290 *modes |= IWINFO_80211_G;
2292 else if (!(*modes & IWINFO_80211_AC))
2294 *modes |= IWINFO_80211_A;
2303 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
2305 struct nl80211_msg_conveyor *req;
2307 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2310 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
2314 return *buf ? 0 : -1;
2317 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
2319 struct nlattr **attr = nl80211_parse(msg);
2320 struct nlattr *comb;
2322 int comb_rem, limit_rem, mode_rem;
2325 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
2328 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
2330 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
2331 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
2332 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
2334 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB];
2335 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
2336 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
2337 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
2339 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT];
2340 struct nlattr *limit;
2342 nla_parse_nested(tb_comb, NL80211_BAND_ATTR_MAX, comb, iface_combination_policy);
2344 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
2347 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
2349 struct nlattr *mode;
2351 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
2353 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
2354 !tb_limit[NL80211_IFACE_LIMIT_MAX])
2357 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
2360 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
2361 if (nla_type(mode) == NL80211_IFTYPE_AP)
2370 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
2372 struct nl80211_msg_conveyor *req;
2374 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2378 nl80211_send(req, nl80211_get_ifcomb_cb, buf);
2383 static int nl80211_get_hardware_id(const char *ifname, char *buf)
2388 /* Got a radioX pseudo interface, find some interface on it or create one */
2389 if (!strncmp(ifname, "radio", 5))
2391 /* Reuse existing interface */
2392 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2394 rv = wext_ops.hardware_id(res, buf);
2397 /* Need to spawn a temporary iface for finding IDs */
2398 else if ((res = nl80211_ifadd(ifname)) != NULL)
2400 rv = wext_ops.hardware_id(res, buf);
2406 rv = wext_ops.hardware_id(ifname, buf);
2409 /* Failed to obtain hardware IDs, search board config */
2412 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2418 static const struct iwinfo_hardware_entry *
2419 nl80211_get_hardware_entry(const char *ifname)
2421 struct iwinfo_hardware_id id;
2423 if (nl80211_get_hardware_id(ifname, (char *)&id))
2426 return iwinfo_hardware(&id);
2429 static int nl80211_get_hardware_name(const char *ifname, char *buf)
2431 const struct iwinfo_hardware_entry *hw;
2433 if (!(hw = nl80211_get_hardware_entry(ifname)))
2434 sprintf(buf, "Generic MAC80211");
2436 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2441 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
2443 const struct iwinfo_hardware_entry *hw;
2445 if (!(hw = nl80211_get_hardware_entry(ifname)))
2448 *buf = hw->txpower_offset;
2452 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
2454 const struct iwinfo_hardware_entry *hw;
2456 if (!(hw = nl80211_get_hardware_entry(ifname)))
2459 *buf = hw->frequency_offset;
2463 const struct iwinfo_ops nl80211_ops = {
2465 .probe = nl80211_probe,
2466 .channel = nl80211_get_channel,
2467 .frequency = nl80211_get_frequency,
2468 .frequency_offset = nl80211_get_frequency_offset,
2469 .txpower = nl80211_get_txpower,
2470 .txpower_offset = nl80211_get_txpower_offset,
2471 .bitrate = nl80211_get_bitrate,
2472 .signal = nl80211_get_signal,
2473 .noise = nl80211_get_noise,
2474 .quality = nl80211_get_quality,
2475 .quality_max = nl80211_get_quality_max,
2476 .mbssid_support = nl80211_get_mbssid_support,
2477 .hwmodelist = nl80211_get_hwmodelist,
2478 .mode = nl80211_get_mode,
2479 .ssid = nl80211_get_ssid,
2480 .bssid = nl80211_get_bssid,
2481 .country = nl80211_get_country,
2482 .hardware_id = nl80211_get_hardware_id,
2483 .hardware_name = nl80211_get_hardware_name,
2484 .encryption = nl80211_get_encryption,
2485 .phyname = nl80211_get_phyname,
2486 .assoclist = nl80211_get_assoclist,
2487 .txpwrlist = nl80211_get_txpwrlist,
2488 .scanlist = nl80211_get_scanlist,
2489 .freqlist = nl80211_get_freqlist,
2490 .countrylist = nl80211_get_countrylist,
2491 .close = nl80211_close