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.
25 #include "iwinfo_nl80211.h"
27 #define min(x, y) ((x) < (y)) ? (x) : (y)
29 static struct nl80211_state *nls = NULL;
31 static void nl80211_close(void)
36 genl_family_put(nls->nlctrl);
39 genl_family_put(nls->nl80211);
42 nl_socket_free(nls->nl_sock);
45 nl_cache_free(nls->nl_cache);
52 static int nl80211_init(void)
58 nls = malloc(sizeof(struct nl80211_state));
64 memset(nls, 0, sizeof(*nls));
66 nls->nl_sock = nl_socket_alloc();
72 if (genl_connect(nls->nl_sock)) {
77 fd = nl_socket_get_fd(nls->nl_sock);
78 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
83 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
88 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
94 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
109 static int nl80211_readint(const char *path)
115 if ((fd = open(path, O_RDONLY)) > -1)
117 if (read(fd, buffer, sizeof(buffer)) > 0)
127 static int nl80211_msg_error(struct sockaddr_nl *nla,
128 struct nlmsgerr *err, void *arg)
135 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
142 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
149 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
154 static void nl80211_free(struct nl80211_msg_conveyor *cv)
169 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
172 static struct nl80211_msg_conveyor cv;
174 struct nl_msg *req = NULL;
175 struct nl_cb *cb = NULL;
181 cb = nl_cb_alloc(NL_CB_DEFAULT);
185 genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
203 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
205 if (nl80211_init() < 0)
208 return nl80211_new(nls->nlctrl, cmd, flags);
211 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
214 int ifidx = -1, phyidx = -1;
215 struct nl80211_msg_conveyor *cv;
217 if (nl80211_init() < 0)
220 if (!strncmp(ifname, "phy", 3))
221 phyidx = atoi(&ifname[3]);
222 else if (!strncmp(ifname, "radio", 5))
223 phyidx = atoi(&ifname[5]);
224 else if (!strncmp(ifname, "mon.", 4))
225 ifidx = if_nametoindex(&ifname[4]);
227 ifidx = if_nametoindex(ifname);
229 if ((ifidx < 0) && (phyidx < 0))
232 cv = nl80211_new(nls->nl80211, cmd, flags);
237 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
240 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
249 static struct nl80211_msg_conveyor * nl80211_send(
250 struct nl80211_msg_conveyor *cv,
251 int (*cb_func)(struct nl_msg *, void *), void *cb_arg
253 static struct nl80211_msg_conveyor rcv;
257 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
259 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
261 if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
264 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
265 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
266 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
269 nl_recvmsgs(nls->nl_sock, cv->cb);
280 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
282 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
283 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
285 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
286 genlmsg_attrlen(gnlh, 0), NULL);
292 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
294 struct nl80211_group_conveyor *cv = arg;
296 struct nlattr **attr = nl80211_parse(msg);
297 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
301 if (!attr[CTRL_ATTR_MCAST_GROUPS])
304 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
306 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
307 nla_data(mgrp), nla_len(mgrp), NULL);
309 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
310 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
311 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
312 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
314 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
322 static int nl80211_subscribe(const char *family, const char *group)
324 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
325 struct nl80211_msg_conveyor *req;
327 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
330 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
331 nl80211_send(req, nl80211_subscribe_cb, &cv);
337 return nl_socket_add_membership(nls->nl_sock, cv.id);
341 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
343 struct nl80211_event_conveyor *cv = arg;
344 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
346 if (gnlh->cmd == cv->wait)
347 cv->recv = gnlh->cmd;
352 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
357 static int nl80211_wait(const char *family, const char *group, int cmd)
359 struct nl80211_event_conveyor cv = { .wait = cmd };
362 if (nl80211_subscribe(family, group))
365 cb = nl_cb_alloc(NL_CB_DEFAULT);
370 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
371 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
374 nl_recvmsgs(nls->nl_sock, cb);
382 static int nl80211_freq2channel(int freq)
386 else if (freq < 2484)
387 return (freq - 2407) / 5;
388 else if (freq >= 4910 && freq <= 4980)
389 return (freq - 4000) / 5;
391 return (freq - 5000) / 5;
394 static int nl80211_channel2freq(int channel, const char *band)
396 if (!band || band[0] != 'a')
400 else if (channel < 14)
401 return (channel * 5) + 2407;
405 if (channel >= 182 && channel <= 196)
406 return (channel * 5) + 4000;
408 return (channel * 5) + 5000;
414 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
417 char lkey[64] = { 0 };
418 const char *ln = buf;
419 static char lval[256] = { 0 };
421 int matched_if = ifname ? 0 : 1;
424 for( i = 0, len = strlen(buf); i < len; i++ )
426 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
430 else if (!lkey[0] && (buf[i] == '='))
432 if ((&buf[i] - ln) > 0)
433 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
435 else if (buf[i] == '\n')
439 memcpy(lval, ln + strlen(lkey) + 1,
440 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
442 if ((ifname != NULL) &&
443 (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
445 matched_if = !strcmp(lval, ifname);
447 else if (matched_if && !strcmp(lkey, key))
454 memset(lkey, 0, sizeof(lkey));
455 memset(lval, 0, sizeof(lval));
462 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
465 struct nlattr **attr = nl80211_parse(msg);
467 if (attr[NL80211_ATTR_WIPHY_NAME])
468 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
469 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
476 static char * nl80211_ifname2phy(const char *ifname)
478 static char phy[32] = { 0 };
479 struct nl80211_msg_conveyor *req;
481 memset(phy, 0, sizeof(phy));
483 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
486 nl80211_send(req, nl80211_ifname2phy_cb, phy);
490 return phy[0] ? phy : NULL;
493 static char * nl80211_phy2ifname(const char *ifname)
495 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
497 static char nif[IFNAMSIZ] = { 0 };
504 else if (!strncmp(ifname, "phy", 3))
505 phyidx = atoi(&ifname[3]);
506 else if (!strncmp(ifname, "radio", 5))
507 phyidx = atoi(&ifname[5]);
509 memset(nif, 0, sizeof(nif));
513 if ((d = opendir("/sys/class/net")) != NULL)
515 while ((e = readdir(d)) != NULL)
517 snprintf(buffer, sizeof(buffer),
518 "/sys/class/net/%s/phy80211/index", e->d_name);
520 if (nl80211_readint(buffer) == phyidx)
522 snprintf(buffer, sizeof(buffer),
523 "/sys/class/net/%s/ifindex", e->d_name);
525 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
526 ((ifidx < 0) || (cifidx < ifidx)))
529 strncpy(nif, e->d_name, sizeof(nif));
538 return nif[0] ? nif : NULL;
541 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
544 struct nlattr **tb = nl80211_parse(msg);
545 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
546 IWINFO_OPMODE_UNKNOWN, /* unspecified */
547 IWINFO_OPMODE_ADHOC, /* IBSS */
548 IWINFO_OPMODE_CLIENT, /* managed */
549 IWINFO_OPMODE_MASTER, /* AP */
550 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
551 IWINFO_OPMODE_WDS, /* WDS */
552 IWINFO_OPMODE_MONITOR, /* monitor */
553 IWINFO_OPMODE_MESHPOINT, /* mesh point */
554 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
555 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
558 if (tb[NL80211_ATTR_IFTYPE])
559 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
565 static int nl80211_get_mode(const char *ifname, int *buf)
568 struct nl80211_msg_conveyor *req;
570 res = nl80211_phy2ifname(ifname);
571 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
572 *buf = IWINFO_OPMODE_UNKNOWN;
576 nl80211_send(req, nl80211_get_mode_cb, buf);
580 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
583 static char * nl80211_hostapd_info(const char *ifname)
587 char path[32] = { 0 };
588 static char buf[4096] = { 0 };
591 if (nl80211_get_mode(ifname, &mode))
594 if ((mode == IWINFO_OPMODE_MASTER || mode == IWINFO_OPMODE_AP_VLAN) &&
595 (phy = nl80211_ifname2phy(ifname)) != NULL)
597 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
599 if ((conf = fopen(path, "r")) != NULL)
601 fread(buf, sizeof(buf) - 1, 1, conf);
611 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
614 struct timeval tv = { 2, 0 };
619 memset(buf, 0, blen);
622 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
625 if (!FD_ISSET(sock, &rfds))
628 return recv(sock, buf, blen, 0);
631 static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
637 size_t remote_length, local_length;
638 static char buffer[10240] = { 0 };
640 struct sockaddr_un local = { 0 };
641 struct sockaddr_un remote = { 0 };
644 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
648 remote.sun_family = AF_UNIX;
649 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
650 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
652 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
655 if (connect(sock, (struct sockaddr *) &remote, remote_length))
657 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
658 "/var/run/wpa_supplicant/%s", ifname);
660 if (connect(sock, (struct sockaddr *) &remote, remote_length))
664 local.sun_family = AF_UNIX;
665 local_length = sizeof(local.sun_family) +
666 sprintf(local.sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
668 if (bind(sock, (struct sockaddr *) &local, local_length))
674 send(sock, "ATTACH", 6, 0);
676 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
681 send(sock, cmd, strlen(cmd), 0);
683 /* we might have to scan up to 72 channels / 256ms per channel */
684 /* this makes up to 18.5s hence 10 tries */
685 while( numtry++ < 10 )
689 /* make sure there is a terminating nul byte */
690 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
698 if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
701 /* there may be more than max(numtry) BSS-ADDED events */
702 /* ignore them similar to wpa_cli */
703 if (buffer[0] == '<' &&
704 (bracket=strchr(buffer,'>')) != NULL &&
705 strncmp(bracket+1,"CTRL-EVENT-BSS-ADDED",20) == 0)
714 if (local.sun_family)
715 unlink(local.sun_path);
720 static char * nl80211_ifadd(const char *ifname)
724 static char nif[IFNAMSIZ] = { 0 };
725 struct nl80211_msg_conveyor *req, *res;
727 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
730 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
732 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
733 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
735 nl80211_send(req, NULL, NULL);
746 static void nl80211_ifdel(const char *ifname)
748 struct nl80211_msg_conveyor *req;
750 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
753 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
755 nl80211_send(req, NULL, NULL);
762 static void nl80211_hostapd_hup(const char *ifname)
766 char *phy = nl80211_ifname2phy(ifname);
770 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
771 if ((fd = open(buf, O_RDONLY)) > 0)
773 if (read(fd, buf, sizeof(buf)) > 0)
785 static int nl80211_probe(const char *ifname)
787 return !!nl80211_ifname2phy(ifname);
790 struct nl80211_ssid_bssid {
792 unsigned char bssid[7];
795 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
799 struct nl80211_ssid_bssid *sb = arg;
800 struct nlattr **tb = nl80211_parse(msg);
801 struct nlattr *bss[NL80211_BSS_MAX + 1];
803 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
804 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
805 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
808 if (!tb[NL80211_ATTR_BSS] ||
809 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
811 !bss[NL80211_BSS_BSSID] ||
812 !bss[NL80211_BSS_STATUS] ||
813 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
818 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
820 case NL80211_BSS_STATUS_ASSOCIATED:
821 case NL80211_BSS_STATUS_AUTHENTICATED:
822 case NL80211_BSS_STATUS_IBSS_JOINED:
826 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
827 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
829 while (ielen >= 2 && ielen >= ie[1])
833 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
844 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
853 static int nl80211_get_ssid(const char *ifname, char *buf)
856 struct nl80211_msg_conveyor *req;
857 struct nl80211_ssid_bssid sb;
859 /* try to find ssid from scan dump results */
860 res = nl80211_phy2ifname(ifname);
861 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
868 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
872 /* failed, try to find from hostapd info */
874 (res = nl80211_hostapd_info(ifname)) &&
875 (res = nl80211_getval(ifname, res, "ssid")))
877 memcpy(buf, res, strlen(res));
880 return (*buf == 0) ? -1 : 0;
883 static int nl80211_get_bssid(const char *ifname, char *buf)
886 struct nl80211_msg_conveyor *req;
887 struct nl80211_ssid_bssid sb;
889 /* try to find bssid from scan dump results */
890 res = nl80211_phy2ifname(ifname);
891 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
898 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
902 /* failed, try to find mac from hostapd info */
903 if ((sb.bssid[0] == 0) &&
904 (res = nl80211_hostapd_info(ifname)) &&
905 (res = nl80211_getval(ifname, res, "bssid")))
908 sb.bssid[1] = strtol(&res[0], NULL, 16);
909 sb.bssid[2] = strtol(&res[3], NULL, 16);
910 sb.bssid[3] = strtol(&res[6], NULL, 16);
911 sb.bssid[4] = strtol(&res[9], NULL, 16);
912 sb.bssid[5] = strtol(&res[12], NULL, 16);
913 sb.bssid[6] = strtol(&res[15], NULL, 16);
918 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
919 sb.bssid[1], sb.bssid[2], sb.bssid[3],
920 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
929 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
932 struct nlattr **attr = nl80211_parse(msg);
933 struct nlattr *binfo[NL80211_BSS_MAX + 1];
935 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
936 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
937 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
940 if (attr[NL80211_ATTR_BSS] &&
941 !nla_parse_nested(binfo, NL80211_BSS_MAX,
942 attr[NL80211_ATTR_BSS], bss_policy))
944 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
945 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
951 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
954 struct nlattr **tb = nl80211_parse(msg);
956 if (tb[NL80211_ATTR_WIPHY_FREQ])
957 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
962 static int nl80211_get_frequency(const char *ifname, int *buf)
966 struct nl80211_msg_conveyor *req;
968 /* try to find frequency from interface info */
969 res = nl80211_phy2ifname(ifname);
970 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
975 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
979 /* failed, try to find frequency from hostapd info */
981 (res = nl80211_hostapd_info(ifname)) &&
982 (channel = nl80211_getval(NULL, res, "channel")))
985 *buf = nl80211_channel2freq(chn, nl80211_getval(NULL, res, "hw_mode"));
989 /* failed, try to find frequency from scan results */
992 res = nl80211_phy2ifname(ifname);
993 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN,
998 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
1004 return (*buf == 0) ? -1 : 0;
1007 static int nl80211_get_channel(const char *ifname, int *buf)
1009 if (!nl80211_get_frequency(ifname, buf))
1011 *buf = nl80211_freq2channel(*buf);
1019 static int nl80211_get_txpower(const char *ifname, int *buf)
1023 char path[PATH_MAX];
1025 res = nl80211_ifname2phy(ifname);
1026 snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1027 res ? res : ifname);
1029 if ((*buf = nl80211_readint(path)) > -1)
1033 return wext_ops.txpower(ifname, buf);
1037 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1041 struct nl80211_rssi_rate *rr = arg;
1042 struct nlattr **attr = nl80211_parse(msg);
1043 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1044 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1046 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1047 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1048 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1049 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1050 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1051 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1052 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1053 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1054 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1055 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1056 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1059 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1060 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1061 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1062 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1063 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1066 if (attr[NL80211_ATTR_STA_INFO])
1068 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1069 attr[NL80211_ATTR_STA_INFO], stats_policy))
1071 if (sinfo[NL80211_STA_INFO_SIGNAL])
1073 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1074 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1077 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1079 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1080 sinfo[NL80211_STA_INFO_TX_BITRATE],
1083 if (rinfo[NL80211_RATE_INFO_BITRATE])
1085 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1087 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1097 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1101 struct nl80211_msg_conveyor *req;
1106 if ((d = opendir("/sys/class/net")) != NULL)
1108 while ((de = readdir(d)) != NULL)
1110 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1111 (!de->d_name[strlen(ifname)] ||
1112 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1114 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1119 nl80211_send(req, nl80211_fill_signal_cb, r);
1129 static int nl80211_get_bitrate(const char *ifname, int *buf)
1131 struct nl80211_rssi_rate rr;
1133 nl80211_fill_signal(ifname, &rr);
1137 *buf = (rr.rate * 100);
1144 static int nl80211_get_signal(const char *ifname, int *buf)
1146 struct nl80211_rssi_rate rr;
1148 nl80211_fill_signal(ifname, &rr);
1159 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1161 int8_t *noise = arg;
1162 struct nlattr **tb = nl80211_parse(msg);
1163 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1165 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1166 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1167 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1170 if (!tb[NL80211_ATTR_SURVEY_INFO])
1173 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1174 tb[NL80211_ATTR_SURVEY_INFO], sp))
1177 if (!si[NL80211_SURVEY_INFO_NOISE])
1180 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1181 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1187 static int nl80211_get_noise(const char *ifname, int *buf)
1190 struct nl80211_msg_conveyor *req;
1192 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1197 nl80211_send(req, nl80211_get_noise_cb, &noise);
1210 static int nl80211_get_quality(const char *ifname, int *buf)
1214 if (!nl80211_get_signal(ifname, &signal))
1216 /* A positive signal level is usually just a quality
1217 * value, pass through as-is */
1223 /* The cfg80211 wext compat layer assumes a signal range
1224 * of -110 dBm to -40 dBm, the quality value is derived
1225 * by adding 110 to the signal level */
1230 else if (signal > -40)
1233 *buf = (signal + 110);
1242 static int nl80211_get_quality_max(const char *ifname, int *buf)
1244 /* The cfg80211 wext compat layer assumes a maximum
1251 static int nl80211_get_encryption(const char *ifname, char *buf)
1256 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1258 /* WPA supplicant */
1259 if ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
1260 (val = nl80211_getval(NULL, res, "pairwise_cipher")))
1263 if (strstr(val, "WEP"))
1265 if (strstr(val, "WEP-40"))
1266 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1268 else if (strstr(val, "WEP-104"))
1269 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1272 c->group_ciphers = c->pair_ciphers;
1274 c->auth_suites |= IWINFO_KMGMT_NONE;
1275 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1281 if (strstr(val, "TKIP"))
1282 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1284 else if (strstr(val, "CCMP"))
1285 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1287 else if (strstr(val, "NONE"))
1288 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1290 else if (strstr(val, "WEP-40"))
1291 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1293 else if (strstr(val, "WEP-104"))
1294 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1297 if ((val = nl80211_getval(NULL, res, "group_cipher")))
1299 if (strstr(val, "TKIP"))
1300 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1302 else if (strstr(val, "CCMP"))
1303 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1305 else if (strstr(val, "NONE"))
1306 c->group_ciphers |= IWINFO_CIPHER_NONE;
1308 else if (strstr(val, "WEP-40"))
1309 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1311 else if (strstr(val, "WEP-104"))
1312 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1316 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
1318 if (strstr(val, "WPA2"))
1321 else if (strstr(val, "WPA"))
1325 if (strstr(val, "PSK"))
1326 c->auth_suites |= IWINFO_KMGMT_PSK;
1328 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
1329 c->auth_suites |= IWINFO_KMGMT_8021x;
1331 else if (strstr(val, "NONE"))
1332 c->auth_suites |= IWINFO_KMGMT_NONE;
1335 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1342 else if ((res = nl80211_hostapd_info(ifname)))
1344 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
1345 c->wpa_version = atoi(val);
1347 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
1349 if (!val || strstr(val, "PSK"))
1350 c->auth_suites |= IWINFO_KMGMT_PSK;
1352 if (val && strstr(val, "EAP"))
1353 c->auth_suites |= IWINFO_KMGMT_8021x;
1355 if (val && strstr(val, "NONE"))
1356 c->auth_suites |= IWINFO_KMGMT_NONE;
1358 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
1360 if (strstr(val, "TKIP"))
1361 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1363 if (strstr(val, "CCMP"))
1364 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1366 if (strstr(val, "NONE"))
1367 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1370 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1374 c->auth_algs |= IWINFO_AUTH_OPEN;
1378 c->auth_algs |= IWINFO_AUTH_SHARED;
1382 c->auth_algs |= IWINFO_AUTH_OPEN;
1383 c->auth_algs |= IWINFO_AUTH_SHARED;
1390 for (i = 0; i < 4; i++)
1392 snprintf(k, sizeof(k), "wep_key%d", i);
1394 if ((val = nl80211_getval(ifname, res, k)))
1396 if ((strlen(val) == 5) || (strlen(val) == 10))
1397 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1399 else if ((strlen(val) == 13) || (strlen(val) == 26))
1400 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1405 c->group_ciphers = c->pair_ciphers;
1406 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1414 static int nl80211_get_phyname(const char *ifname, char *buf)
1418 name = nl80211_ifname2phy(ifname);
1425 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1427 name = nl80211_ifname2phy(name);
1431 strcpy(buf, ifname);
1440 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1442 struct nl80211_array_buf *arr = arg;
1443 struct iwinfo_assoclist_entry *e = arr->buf;
1444 struct nlattr **attr = nl80211_parse(msg);
1445 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1446 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1448 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1449 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1450 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1451 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1452 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1453 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1454 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1457 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1458 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1459 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1460 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1461 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1464 /* advance to end of array */
1466 memset(e, 0, sizeof(*e));
1468 if (attr[NL80211_ATTR_MAC])
1469 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1471 if (attr[NL80211_ATTR_STA_INFO] &&
1472 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1473 attr[NL80211_ATTR_STA_INFO], stats_policy))
1475 if (sinfo[NL80211_STA_INFO_SIGNAL])
1476 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1478 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1479 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1481 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1482 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1484 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1485 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1487 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1488 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1489 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1491 if (rinfo[NL80211_RATE_INFO_BITRATE])
1493 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1495 if (rinfo[NL80211_RATE_INFO_MCS])
1496 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1498 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1499 e->rx_rate.is_40mhz = 1;
1501 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1502 e->rx_rate.is_short_gi = 1;
1505 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1506 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1507 sinfo[NL80211_STA_INFO_TX_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->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1516 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1517 e->tx_rate.is_40mhz = 1;
1519 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1520 e->tx_rate.is_short_gi = 1;
1524 e->noise = 0; /* filled in by caller */
1530 static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1535 struct nl80211_msg_conveyor *req;
1536 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1537 struct iwinfo_assoclist_entry *e;
1539 if ((d = opendir("/sys/class/net")) != NULL)
1541 while ((de = readdir(d)) != NULL)
1543 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1544 (!de->d_name[strlen(ifname)] ||
1545 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1547 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1552 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1560 if (!nl80211_get_noise(ifname, &noise))
1561 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1564 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1571 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1574 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1576 struct nlattr **attr = nl80211_parse(msg);
1577 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1578 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1579 struct nlattr *band, *freq;
1581 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1582 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1583 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1584 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1585 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1586 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1587 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1590 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1593 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1595 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1596 nla_len(band), NULL);
1598 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1600 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1601 nla_data(freq), nla_len(freq), freq_policy);
1603 ch_cmp = nl80211_freq2channel(nla_get_u32(
1604 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1606 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1607 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1609 *dbm_max = (int)(0.01 * nla_get_u32(
1610 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1620 static int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1623 int dbm_max = -1, dbm_cur, dbm_cnt;
1624 struct nl80211_msg_conveyor *req;
1625 struct iwinfo_txpwrlist_entry entry;
1627 if (nl80211_get_channel(ifname, &ch_cur))
1630 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1633 /* initialize the value pointer with channel for callback */
1636 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1642 for (dbm_cur = 0, dbm_cnt = 0;
1644 dbm_cur++, dbm_cnt++)
1646 entry.dbm = dbm_cur;
1647 entry.mw = iwinfo_dbm2mw(dbm_cur);
1649 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1652 entry.dbm = dbm_max;
1653 entry.mw = iwinfo_dbm2mw(dbm_max);
1655 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1658 *len = dbm_cnt * sizeof(entry);
1665 static void nl80211_get_scancrypto(const char *spec,
1666 struct iwinfo_crypto_entry *c)
1668 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1672 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1675 else if (strstr(spec, "WPA2"))
1678 else if (strstr(spec, "WPA"))
1681 else if (strstr(spec, "WEP"))
1682 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1685 if (strstr(spec, "PSK"))
1686 c->auth_suites |= IWINFO_KMGMT_PSK;
1688 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1689 c->auth_suites |= IWINFO_KMGMT_8021x;
1691 if (strstr(spec, "WPA-NONE"))
1692 c->auth_suites |= IWINFO_KMGMT_NONE;
1695 if (strstr(spec, "TKIP"))
1696 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1698 if (strstr(spec, "CCMP"))
1699 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1701 if (strstr(spec, "WEP-40"))
1702 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1704 if (strstr(spec, "WEP-104"))
1705 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1707 c->group_ciphers = c->pair_ciphers;
1716 struct nl80211_scanlist {
1717 struct iwinfo_scanlist_entry *e;
1722 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1723 struct iwinfo_scanlist_entry *e)
1725 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1726 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1727 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1730 while (ielen >= 2 && ielen >= ie[1])
1735 len = min(ie[1], IWINFO_ESSID_MAX_SIZE);
1736 memcpy(e->ssid, ie + 2, len);
1741 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1742 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1745 case 221: /* Vendor */
1746 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1747 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1748 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1757 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1762 struct nl80211_scanlist *sl = arg;
1763 struct nlattr **tb = nl80211_parse(msg);
1764 struct nlattr *bss[NL80211_BSS_MAX + 1];
1766 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1767 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1768 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1769 [NL80211_BSS_BSSID] = { },
1770 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1771 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1772 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
1773 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1774 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1775 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1776 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1777 [NL80211_BSS_BEACON_IES] = { },
1780 if (!tb[NL80211_ATTR_BSS] ||
1781 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1783 !bss[NL80211_BSS_BSSID])
1788 if (bss[NL80211_BSS_CAPABILITY])
1789 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1793 memset(sl->e, 0, sizeof(*sl->e));
1794 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
1797 sl->e->mode = IWINFO_OPMODE_ADHOC;
1798 else if (caps & (1<<0))
1799 sl->e->mode = IWINFO_OPMODE_MASTER;
1801 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
1804 sl->e->crypto.enabled = 1;
1806 if (bss[NL80211_BSS_FREQUENCY])
1807 sl->e->channel = nl80211_freq2channel(nla_get_u32(
1808 bss[NL80211_BSS_FREQUENCY]));
1810 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
1811 nl80211_get_scanlist_ie(bss, sl->e);
1813 if (bss[NL80211_BSS_SIGNAL_MBM])
1816 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
1818 rssi = sl->e->signal - 0x100;
1822 else if (rssi > -40)
1825 sl->e->quality = (rssi + 110);
1826 sl->e->quality_max = 70;
1829 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
1831 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1832 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
1841 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
1843 struct nl80211_msg_conveyor *req;
1844 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
1846 req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
1849 nl80211_send(req, NULL, NULL);
1853 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
1855 req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1858 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
1862 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
1863 return *len ? 0 : -1;
1866 static int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1868 int freq, rssi, qmax, count;
1870 char ssid[128] = { 0 };
1871 char bssid[18] = { 0 };
1872 char cipher[256] = { 0 };
1874 /* Got a radioX pseudo interface, find some interface on it or create one */
1875 if (!strncmp(ifname, "radio", 5))
1877 /* Reuse existing interface */
1878 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1880 return nl80211_get_scanlist(res, buf, len);
1883 /* Need to spawn a temporary iface for scanning */
1884 else if ((res = nl80211_ifadd(ifname)) != NULL)
1886 count = nl80211_get_scanlist(res, buf, len);
1892 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1894 /* WPA supplicant */
1895 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1897 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1899 nl80211_get_quality_max(ifname, &qmax);
1906 /* skip log lines */
1911 /* skip header line */
1915 if (sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1916 bssid, &freq, &rssi, cipher, ssid) < 5)
1918 /* skip malformed lines */
1922 e->mac[0] = strtol(&bssid[0], NULL, 16);
1923 e->mac[1] = strtol(&bssid[3], NULL, 16);
1924 e->mac[2] = strtol(&bssid[6], NULL, 16);
1925 e->mac[3] = strtol(&bssid[9], NULL, 16);
1926 e->mac[4] = strtol(&bssid[12], NULL, 16);
1927 e->mac[5] = strtol(&bssid[15], NULL, 16);
1930 memcpy(e->ssid, ssid, min(strlen(ssid), sizeof(e->ssid) - 1));
1932 /* Mode (assume master) */
1933 if (strstr(cipher,"[MESH]"))
1934 e->mode = IWINFO_OPMODE_MESHPOINT;
1936 e->mode = IWINFO_OPMODE_MASTER;
1939 e->channel = nl80211_freq2channel(freq);
1947 /* The cfg80211 wext compat layer assumes a signal range
1948 * of -110 dBm to -40 dBm, the quality value is derived
1949 * by adding 110 to the signal level */
1952 else if (rssi > -40)
1955 e->quality = (rssi + 110);
1963 e->quality_max = qmax;
1966 nl80211_get_scancrypto(cipher, &e->crypto);
1971 memset(ssid, 0, sizeof(ssid));
1972 memset(bssid, 0, sizeof(bssid));
1973 memset(cipher, 0, sizeof(cipher));
1976 /* advance to next line */
1977 while( *res && *res++ != '\n' );
1981 *len = count * sizeof(struct iwinfo_scanlist_entry);
1989 /* Got a temp interface, don't create yet another one */
1990 if (!strncmp(ifname, "tmp.", 4))
1992 if (!iwinfo_ifup(ifname))
1995 nl80211_get_scanlist_nl(ifname, buf, len);
1996 iwinfo_ifdown(ifname);
2000 /* Spawn a new scan interface */
2003 if (!(res = nl80211_ifadd(ifname)))
2006 if (!iwinfo_ifmac(res))
2009 /* if we can take the new interface up, the driver supports an
2010 * additional interface and there's no need to tear down the ap */
2011 if (iwinfo_ifup(res))
2013 nl80211_get_scanlist_nl(res, buf, len);
2017 /* driver cannot create secondary interface, take down ap
2019 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2021 nl80211_get_scanlist_nl(res, buf, len);
2023 iwinfo_ifup(ifname);
2024 nl80211_hostapd_hup(ifname);
2036 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2038 int bands_remain, freqs_remain;
2040 struct nl80211_array_buf *arr = arg;
2041 struct iwinfo_freqlist_entry *e = arr->buf;
2043 struct nlattr **attr = nl80211_parse(msg);
2044 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2045 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2046 struct nlattr *band, *freq;
2048 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2049 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2050 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2051 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2052 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2053 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2054 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2057 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2059 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2060 nla_data(band), nla_len(band), NULL);
2062 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2064 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2065 nla_data(freq), nla_len(freq), NULL);
2067 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2068 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2071 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2072 e->channel = nl80211_freq2channel(e->mhz);
2075 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
2076 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
2077 freqs[NL80211_FREQUENCY_ATTR_RADAR]
2088 static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2090 struct nl80211_msg_conveyor *req;
2091 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2093 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2096 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2102 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2109 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2112 struct nlattr **attr = nl80211_parse(msg);
2114 if (attr[NL80211_ATTR_REG_ALPHA2])
2115 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2122 static int nl80211_get_country(const char *ifname, char *buf)
2125 struct nl80211_msg_conveyor *req;
2127 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2130 nl80211_send(req, nl80211_get_country_cb, buf);
2140 static int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2143 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2144 const struct iwinfo_iso3166_label *l;
2146 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2148 e->iso3166 = l->iso3166;
2149 e->ccode[0] = (l->iso3166 / 256);
2150 e->ccode[1] = (l->iso3166 % 256);
2153 *len = (count * sizeof(struct iwinfo_country_entry));
2157 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
2160 int bands_remain, freqs_remain;
2162 uint32_t vht_caps = 0;
2163 struct nlattr **attr = nl80211_parse(msg);
2164 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2165 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2166 struct nlattr *band, *freq;
2170 if (attr[NL80211_ATTR_WIPHY_BANDS])
2172 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2174 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2175 nla_data(band), nla_len(band), NULL);
2177 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2178 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2180 /* Treat any nonzero capability as 11n */
2182 *modes |= IWINFO_80211_N;
2184 if (bands[NL80211_BAND_ATTR_VHT_CAPA])
2185 vht_caps = nla_get_u32(bands[NL80211_BAND_ATTR_VHT_CAPA]);
2187 /* Treat any nonzero capability as 11ac */
2189 *modes |= IWINFO_80211_AC;
2191 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2194 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2195 nla_data(freq), nla_len(freq), NULL);
2197 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2200 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2202 *modes |= IWINFO_80211_B;
2203 *modes |= IWINFO_80211_G;
2205 else if (!(*modes & IWINFO_80211_AC))
2207 *modes |= IWINFO_80211_A;
2216 static int nl80211_get_hwmodelist(const char *ifname, int *buf)
2218 struct nl80211_msg_conveyor *req;
2220 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2223 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
2227 return *buf ? 0 : -1;
2230 static int nl80211_get_ifcomb_cb(struct nl_msg *msg, void *arg)
2232 struct nlattr **attr = nl80211_parse(msg);
2233 struct nlattr *comb;
2235 int comb_rem, limit_rem, mode_rem;
2238 if (!attr[NL80211_ATTR_INTERFACE_COMBINATIONS])
2241 nla_for_each_nested(comb, attr[NL80211_ATTR_INTERFACE_COMBINATIONS], comb_rem)
2243 static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
2244 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
2245 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
2247 struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB];
2248 static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
2249 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
2250 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
2252 struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT];
2253 struct nlattr *limit;
2255 nla_parse_nested(tb_comb, NL80211_BAND_ATTR_MAX, comb, iface_combination_policy);
2257 if (!tb_comb[NL80211_IFACE_COMB_LIMITS])
2260 nla_for_each_nested(limit, tb_comb[NL80211_IFACE_COMB_LIMITS], limit_rem)
2262 struct nlattr *mode;
2264 nla_parse_nested(tb_limit, NUM_NL80211_IFACE_LIMIT, limit, iface_limit_policy);
2266 if (!tb_limit[NL80211_IFACE_LIMIT_TYPES] ||
2267 !tb_limit[NL80211_IFACE_LIMIT_MAX])
2270 if (nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]) < 2)
2273 nla_for_each_nested(mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], mode_rem) {
2274 if (nla_type(mode) == NL80211_IFTYPE_AP)
2283 static int nl80211_get_mbssid_support(const char *ifname, int *buf)
2285 struct nl80211_msg_conveyor *req;
2287 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2291 nl80211_send(req, nl80211_get_ifcomb_cb, buf);
2296 static int nl80211_get_hardware_id(const char *ifname, char *buf)
2301 /* Got a radioX pseudo interface, find some interface on it or create one */
2302 if (!strncmp(ifname, "radio", 5))
2304 /* Reuse existing interface */
2305 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2307 rv = wext_ops.hardware_id(res, buf);
2310 /* Need to spawn a temporary iface for finding IDs */
2311 else if ((res = nl80211_ifadd(ifname)) != NULL)
2313 rv = wext_ops.hardware_id(res, buf);
2319 rv = wext_ops.hardware_id(ifname, buf);
2322 /* Failed to obtain hardware IDs, search board config */
2325 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2331 static const struct iwinfo_hardware_entry *
2332 nl80211_get_hardware_entry(const char *ifname)
2334 struct iwinfo_hardware_id id;
2336 if (nl80211_get_hardware_id(ifname, (char *)&id))
2339 return iwinfo_hardware(&id);
2342 static int nl80211_get_hardware_name(const char *ifname, char *buf)
2344 const struct iwinfo_hardware_entry *hw;
2346 if (!(hw = nl80211_get_hardware_entry(ifname)))
2347 sprintf(buf, "Generic MAC80211");
2349 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2354 static int nl80211_get_txpower_offset(const char *ifname, int *buf)
2356 const struct iwinfo_hardware_entry *hw;
2358 if (!(hw = nl80211_get_hardware_entry(ifname)))
2361 *buf = hw->txpower_offset;
2365 static int nl80211_get_frequency_offset(const char *ifname, int *buf)
2367 const struct iwinfo_hardware_entry *hw;
2369 if (!(hw = nl80211_get_hardware_entry(ifname)))
2372 *buf = hw->frequency_offset;
2376 const struct iwinfo_ops nl80211_ops = {
2378 .probe = nl80211_probe,
2379 .channel = nl80211_get_channel,
2380 .frequency = nl80211_get_frequency,
2381 .frequency_offset = nl80211_get_frequency_offset,
2382 .txpower = nl80211_get_txpower,
2383 .txpower_offset = nl80211_get_txpower_offset,
2384 .bitrate = nl80211_get_bitrate,
2385 .signal = nl80211_get_signal,
2386 .noise = nl80211_get_noise,
2387 .quality = nl80211_get_quality,
2388 .quality_max = nl80211_get_quality_max,
2389 .mbssid_support = nl80211_get_mbssid_support,
2390 .hwmodelist = nl80211_get_hwmodelist,
2391 .mode = nl80211_get_mode,
2392 .ssid = nl80211_get_ssid,
2393 .bssid = nl80211_get_bssid,
2394 .country = nl80211_get_country,
2395 .hardware_id = nl80211_get_hardware_id,
2396 .hardware_name = nl80211_get_hardware_name,
2397 .encryption = nl80211_get_encryption,
2398 .phyname = nl80211_get_phyname,
2399 .assoclist = nl80211_get_assoclist,
2400 .txpwrlist = nl80211_get_txpwrlist,
2401 .scanlist = nl80211_get_scanlist,
2402 .freqlist = nl80211_get_freqlist,
2403 .countrylist = nl80211_get_countrylist,
2404 .close = nl80211_close