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"
26 #include "iwinfo/wext.h"
28 #define min(x, y) ((x) < (y)) ? (x) : (y)
30 static struct nl80211_state *nls = NULL;
32 static int nl80211_init(void)
38 nls = malloc(sizeof(struct nl80211_state));
44 memset(nls, 0, sizeof(*nls));
46 nls->nl_sock = nl_socket_alloc();
52 if (genl_connect(nls->nl_sock)) {
57 fd = nl_socket_get_fd(nls->nl_sock);
58 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0) {
63 if (genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
68 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
74 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
90 static int nl80211_msg_error(struct sockaddr_nl *nla,
91 struct nlmsgerr *err, void *arg)
98 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
105 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
112 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
117 static void nl80211_free(struct nl80211_msg_conveyor *cv)
132 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
135 static struct nl80211_msg_conveyor cv;
137 struct nl_msg *req = NULL;
138 struct nl_cb *cb = NULL;
144 cb = nl_cb_alloc(NL_CB_DEFAULT);
148 genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
166 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
168 if (nl80211_init() < 0)
171 return nl80211_new(nls->nlctrl, cmd, flags);
174 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
177 int ifidx = -1, phyidx = -1;
178 struct nl80211_msg_conveyor *cv;
180 if (nl80211_init() < 0)
183 if (!strncmp(ifname, "phy", 3))
184 phyidx = atoi(&ifname[3]);
185 else if (!strncmp(ifname, "radio", 5))
186 phyidx = atoi(&ifname[5]);
187 else if (!strncmp(ifname, "mon.", 4))
188 ifidx = if_nametoindex(&ifname[4]);
190 ifidx = if_nametoindex(ifname);
192 if ((ifidx < 0) && (phyidx < 0))
195 cv = nl80211_new(nls->nl80211, cmd, flags);
200 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
203 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
212 static struct nl80211_msg_conveyor * nl80211_send(
213 struct nl80211_msg_conveyor *cv,
214 int (*cb_func)(struct nl_msg *, void *), void *cb_arg
216 static struct nl80211_msg_conveyor rcv;
220 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
222 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
224 if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
227 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
228 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
229 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
232 nl_recvmsgs(nls->nl_sock, cv->cb);
243 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
245 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
246 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
248 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
249 genlmsg_attrlen(gnlh, 0), NULL);
255 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
257 struct nl80211_group_conveyor *cv = arg;
259 struct nlattr **attr = nl80211_parse(msg);
260 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
264 if (!attr[CTRL_ATTR_MCAST_GROUPS])
267 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
269 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
270 nla_data(mgrp), nla_len(mgrp), NULL);
272 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
273 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
274 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
275 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
277 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
285 static int nl80211_subscribe(const char *family, const char *group)
287 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
288 struct nl80211_msg_conveyor *req;
290 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
293 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
294 nl80211_send(req, nl80211_subscribe_cb, &cv);
300 return nl_socket_add_membership(nls->nl_sock, cv.id);
304 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
306 struct nl80211_event_conveyor *cv = arg;
307 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
309 if (gnlh->cmd == cv->wait)
310 cv->recv = gnlh->cmd;
315 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
320 static int nl80211_wait(const char *family, const char *group, int cmd)
322 struct nl80211_event_conveyor cv = { .wait = cmd };
325 if (nl80211_subscribe(family, group))
328 cb = nl_cb_alloc(NL_CB_DEFAULT);
333 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
334 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
337 nl_recvmsgs(nls->nl_sock, cb);
345 static int nl80211_freq2channel(int freq)
349 else if (freq < 2484)
350 return (freq - 2407) / 5;
351 else if (freq >= 4910 && freq <= 4980)
352 return (freq - 4000) / 5;
354 return (freq - 5000) / 5;
357 static int nl80211_channel2freq(int channel, const char *band)
359 if (!band || band[0] != 'a')
363 else if (channel < 14)
364 return (channel * 5) + 2407;
368 if (channel >= 182 && channel <= 196)
369 return (channel * 5) + 4000;
371 return (channel * 5) + 5000;
377 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
380 char lkey[64] = { 0 };
381 const char *ln = buf;
382 static char lval[256] = { 0 };
384 int matched_if = ifname ? 0 : 1;
387 for( i = 0, len = strlen(buf); i < len; i++ )
389 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
393 else if (!lkey[0] && (buf[i] == '='))
395 if ((&buf[i] - ln) > 0)
396 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
398 else if (buf[i] == '\n')
402 memcpy(lval, ln + strlen(lkey) + 1,
403 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
405 if ((ifname != NULL) &&
406 (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
408 matched_if = !strcmp(lval, ifname);
410 else if (matched_if && !strcmp(lkey, key))
417 memset(lkey, 0, sizeof(lkey));
418 memset(lval, 0, sizeof(lval));
425 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
428 struct nlattr **attr = nl80211_parse(msg);
430 if (attr[NL80211_ATTR_WIPHY_NAME])
431 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
432 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
439 static char * nl80211_ifname2phy(const char *ifname)
441 static char phy[32] = { 0 };
442 struct nl80211_msg_conveyor *req;
444 memset(phy, 0, sizeof(phy));
446 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
449 nl80211_send(req, nl80211_ifname2phy_cb, phy);
453 return phy[0] ? phy : NULL;
456 static char * nl80211_hostapd_info(const char *ifname)
460 char path[32] = { 0 };
461 static char buf[4096] = { 0 };
464 if (nl80211_get_mode(ifname, &mode))
467 if ((mode == IWINFO_OPMODE_MASTER || mode == IWINFO_OPMODE_AP_VLAN) &&
468 (phy = nl80211_ifname2phy(ifname)) != NULL)
470 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
472 if ((conf = fopen(path, "r")) != NULL)
474 fread(buf, sizeof(buf) - 1, 1, conf);
484 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
487 struct timeval tv = { 2, 0 };
492 memset(buf, 0, blen);
495 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
498 if (!FD_ISSET(sock, &rfds))
501 return recv(sock, buf, blen, 0);
504 static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
510 size_t remote_length, local_length;
511 static char buffer[10240] = { 0 };
513 struct sockaddr_un local = { 0 };
514 struct sockaddr_un remote = { 0 };
517 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
521 remote.sun_family = AF_UNIX;
522 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
523 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
525 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
528 if (connect(sock, (struct sockaddr *) &remote, remote_length))
531 local.sun_family = AF_UNIX;
532 local_length = sizeof(local.sun_family) +
533 sprintf(local.sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
535 if (bind(sock, (struct sockaddr *) &local, local_length))
541 send(sock, "ATTACH", 6, 0);
543 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
548 send(sock, cmd, strlen(cmd), 0);
550 /* we might have to scan up to 72 channels / 256ms per channel */
551 /* this makes up to 18.5s hence 10 tries */
552 while( numtry++ < 10 )
556 /* make sure there is a terminating nul byte */
557 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)-1) <= 0)
565 if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
568 /* there may be more than max(numtry) BSS-ADDED events */
569 /* ignore them similar to wpa_cli */
570 if (buffer[0] == '<' &&
571 (bracket=strchr(buffer,'>')) != NULL &&
572 strncmp(bracket+1,"CTRL-EVENT-BSS-ADDED",20) == 0)
581 if (local.sun_family)
582 unlink(local.sun_path);
587 static inline int nl80211_readint(const char *path)
593 if ((fd = open(path, O_RDONLY)) > -1)
595 if (read(fd, buffer, sizeof(buffer)) > 0)
604 static char * nl80211_phy2ifname(const char *ifname)
606 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
608 static char nif[IFNAMSIZ] = { 0 };
615 else if (!strncmp(ifname, "phy", 3))
616 phyidx = atoi(&ifname[3]);
617 else if (!strncmp(ifname, "radio", 5))
618 phyidx = atoi(&ifname[5]);
620 memset(nif, 0, sizeof(nif));
624 if ((d = opendir("/sys/class/net")) != NULL)
626 while ((e = readdir(d)) != NULL)
628 snprintf(buffer, sizeof(buffer),
629 "/sys/class/net/%s/phy80211/index", e->d_name);
631 if (nl80211_readint(buffer) == phyidx)
633 snprintf(buffer, sizeof(buffer),
634 "/sys/class/net/%s/ifindex", e->d_name);
636 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
637 ((ifidx < 0) || (cifidx < ifidx)))
640 strncpy(nif, e->d_name, sizeof(nif));
649 return nif[0] ? nif : NULL;
652 static char * nl80211_ifadd(const char *ifname)
656 static char nif[IFNAMSIZ] = { 0 };
657 struct nl80211_msg_conveyor *req, *res;
659 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
662 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
664 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
665 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
667 nl80211_send(req, NULL, NULL);
678 static void nl80211_ifdel(const char *ifname)
680 struct nl80211_msg_conveyor *req;
682 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
685 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
687 nl80211_send(req, NULL, NULL);
694 static void nl80211_hostapd_hup(const char *ifname)
698 char *phy = nl80211_ifname2phy(ifname);
702 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
703 if ((fd = open(buf, O_RDONLY)) > 0)
705 if (read(fd, buf, sizeof(buf)) > 0)
717 int nl80211_probe(const char *ifname)
719 return !!nl80211_ifname2phy(ifname);
722 void nl80211_close(void)
727 genl_family_put(nls->nlctrl);
730 genl_family_put(nls->nl80211);
733 nl_socket_free(nls->nl_sock);
736 nl_cache_free(nls->nl_cache);
744 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
747 struct nlattr **tb = nl80211_parse(msg);
748 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
749 IWINFO_OPMODE_UNKNOWN, /* unspecified */
750 IWINFO_OPMODE_ADHOC, /* IBSS */
751 IWINFO_OPMODE_CLIENT, /* managed */
752 IWINFO_OPMODE_MASTER, /* AP */
753 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
754 IWINFO_OPMODE_WDS, /* WDS */
755 IWINFO_OPMODE_MONITOR, /* monitor */
756 IWINFO_OPMODE_MESHPOINT, /* mesh point */
757 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
758 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
761 if (tb[NL80211_ATTR_IFTYPE])
762 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
767 int nl80211_get_mode(const char *ifname, int *buf)
770 struct nl80211_msg_conveyor *req;
772 res = nl80211_phy2ifname(ifname);
773 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
774 *buf = IWINFO_OPMODE_UNKNOWN;
778 nl80211_send(req, nl80211_get_mode_cb, buf);
782 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
786 struct nl80211_ssid_bssid {
788 unsigned char bssid[7];
791 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
795 struct nl80211_ssid_bssid *sb = arg;
796 struct nlattr **tb = nl80211_parse(msg);
797 struct nlattr *bss[NL80211_BSS_MAX + 1];
799 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
800 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
801 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
804 if (!tb[NL80211_ATTR_BSS] ||
805 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
807 !bss[NL80211_BSS_BSSID] ||
808 !bss[NL80211_BSS_STATUS] ||
809 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
814 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
816 case NL80211_BSS_STATUS_ASSOCIATED:
817 case NL80211_BSS_STATUS_AUTHENTICATED:
818 case NL80211_BSS_STATUS_IBSS_JOINED:
822 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
823 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
825 while (ielen >= 2 && ielen >= ie[1])
829 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
840 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
849 int nl80211_get_ssid(const char *ifname, char *buf)
852 struct nl80211_msg_conveyor *req;
853 struct nl80211_ssid_bssid sb;
855 /* try to find ssid from scan dump results */
856 res = nl80211_phy2ifname(ifname);
857 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
864 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
868 /* failed, try to find from hostapd info */
870 (res = nl80211_hostapd_info(ifname)) &&
871 (res = nl80211_getval(ifname, res, "ssid")))
873 memcpy(buf, res, strlen(res));
876 return (*buf == 0) ? -1 : 0;
879 int nl80211_get_bssid(const char *ifname, char *buf)
882 struct nl80211_msg_conveyor *req;
883 struct nl80211_ssid_bssid sb;
885 /* try to find bssid from scan dump results */
886 res = nl80211_phy2ifname(ifname);
887 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
894 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
898 /* failed, try to find mac from hostapd info */
899 if ((sb.bssid[0] == 0) &&
900 (res = nl80211_hostapd_info(ifname)) &&
901 (res = nl80211_getval(ifname, res, "bssid")))
904 sb.bssid[1] = strtol(&res[0], NULL, 16);
905 sb.bssid[2] = strtol(&res[3], NULL, 16);
906 sb.bssid[3] = strtol(&res[6], NULL, 16);
907 sb.bssid[4] = strtol(&res[9], NULL, 16);
908 sb.bssid[5] = strtol(&res[12], NULL, 16);
909 sb.bssid[6] = strtol(&res[15], NULL, 16);
914 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
915 sb.bssid[1], sb.bssid[2], sb.bssid[3],
916 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
925 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
928 struct nlattr **attr = nl80211_parse(msg);
929 struct nlattr *binfo[NL80211_BSS_MAX + 1];
931 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
932 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
933 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
936 if (attr[NL80211_ATTR_BSS] &&
937 !nla_parse_nested(binfo, NL80211_BSS_MAX,
938 attr[NL80211_ATTR_BSS], bss_policy))
940 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
941 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
947 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
950 struct nlattr **tb = nl80211_parse(msg);
952 if (tb[NL80211_ATTR_WIPHY_FREQ])
953 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
958 int nl80211_get_frequency(const char *ifname, int *buf)
962 struct nl80211_msg_conveyor *req;
964 /* try to find frequency from interface info */
965 res = nl80211_phy2ifname(ifname);
966 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
971 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
975 /* failed, try to find frequency from hostapd info */
977 (res = nl80211_hostapd_info(ifname)) &&
978 (channel = nl80211_getval(NULL, res, "channel")))
981 *buf = nl80211_channel2freq(chn, nl80211_getval(NULL, res, "hw_mode"));
985 /* failed, try to find frequency from scan results */
988 res = nl80211_phy2ifname(ifname);
989 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN,
994 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
1000 return (*buf == 0) ? -1 : 0;
1003 int nl80211_get_channel(const char *ifname, int *buf)
1005 if (!nl80211_get_frequency(ifname, buf))
1007 *buf = nl80211_freq2channel(*buf);
1015 int nl80211_get_txpower(const char *ifname, int *buf)
1019 char path[PATH_MAX];
1021 res = nl80211_ifname2phy(ifname);
1022 snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1023 res ? res : ifname);
1025 if ((*buf = nl80211_readint(path)) > -1)
1029 return wext_get_txpower(ifname, buf);
1033 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1037 struct nl80211_rssi_rate *rr = arg;
1038 struct nlattr **attr = nl80211_parse(msg);
1039 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1040 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1042 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1043 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1044 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1045 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1046 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1047 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1048 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1049 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1050 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1051 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1052 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1055 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1056 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1057 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1058 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1059 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1062 if (attr[NL80211_ATTR_STA_INFO])
1064 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1065 attr[NL80211_ATTR_STA_INFO], stats_policy))
1067 if (sinfo[NL80211_STA_INFO_SIGNAL])
1069 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1070 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1073 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1075 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1076 sinfo[NL80211_STA_INFO_TX_BITRATE],
1079 if (rinfo[NL80211_RATE_INFO_BITRATE])
1081 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1083 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1093 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1097 struct nl80211_msg_conveyor *req;
1102 if ((d = opendir("/sys/class/net")) != NULL)
1104 while ((de = readdir(d)) != NULL)
1106 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1107 (!de->d_name[strlen(ifname)] ||
1108 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1110 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1115 nl80211_send(req, nl80211_fill_signal_cb, r);
1125 int nl80211_get_bitrate(const char *ifname, int *buf)
1127 struct nl80211_rssi_rate rr;
1129 nl80211_fill_signal(ifname, &rr);
1133 *buf = (rr.rate * 100);
1140 int nl80211_get_signal(const char *ifname, int *buf)
1142 struct nl80211_rssi_rate rr;
1144 nl80211_fill_signal(ifname, &rr);
1155 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1157 int8_t *noise = arg;
1158 struct nlattr **tb = nl80211_parse(msg);
1159 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1161 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1162 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1163 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1166 if (!tb[NL80211_ATTR_SURVEY_INFO])
1169 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1170 tb[NL80211_ATTR_SURVEY_INFO], sp))
1173 if (!si[NL80211_SURVEY_INFO_NOISE])
1176 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1177 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1183 int nl80211_get_noise(const char *ifname, int *buf)
1186 struct nl80211_msg_conveyor *req;
1188 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1193 nl80211_send(req, nl80211_get_noise_cb, &noise);
1206 int nl80211_get_quality(const char *ifname, int *buf)
1210 if (!nl80211_get_signal(ifname, &signal))
1212 /* A positive signal level is usually just a quality
1213 * value, pass through as-is */
1219 /* The cfg80211 wext compat layer assumes a signal range
1220 * of -110 dBm to -40 dBm, the quality value is derived
1221 * by adding 110 to the signal level */
1226 else if (signal > -40)
1229 *buf = (signal + 110);
1238 int nl80211_get_quality_max(const char *ifname, int *buf)
1240 /* The cfg80211 wext compat layer assumes a maximum
1247 int nl80211_get_encryption(const char *ifname, char *buf)
1252 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1254 /* WPA supplicant */
1255 if ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
1256 (val = nl80211_getval(NULL, res, "pairwise_cipher")))
1259 if (strstr(val, "WEP"))
1261 if (strstr(val, "WEP-40"))
1262 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1264 else if (strstr(val, "WEP-104"))
1265 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1268 c->group_ciphers = c->pair_ciphers;
1270 c->auth_suites |= IWINFO_KMGMT_NONE;
1271 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1277 if (strstr(val, "TKIP"))
1278 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1280 else if (strstr(val, "CCMP"))
1281 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1283 else if (strstr(val, "NONE"))
1284 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1286 else if (strstr(val, "WEP-40"))
1287 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1289 else if (strstr(val, "WEP-104"))
1290 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1293 if ((val = nl80211_getval(NULL, res, "group_cipher")))
1295 if (strstr(val, "TKIP"))
1296 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1298 else if (strstr(val, "CCMP"))
1299 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1301 else if (strstr(val, "NONE"))
1302 c->group_ciphers |= IWINFO_CIPHER_NONE;
1304 else if (strstr(val, "WEP-40"))
1305 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1307 else if (strstr(val, "WEP-104"))
1308 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1312 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
1314 if (strstr(val, "WPA2"))
1317 else if (strstr(val, "WPA"))
1321 if (strstr(val, "PSK"))
1322 c->auth_suites |= IWINFO_KMGMT_PSK;
1324 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
1325 c->auth_suites |= IWINFO_KMGMT_8021x;
1327 else if (strstr(val, "NONE"))
1328 c->auth_suites |= IWINFO_KMGMT_NONE;
1331 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1338 else if ((res = nl80211_hostapd_info(ifname)))
1340 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
1341 c->wpa_version = atoi(val);
1343 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
1345 if (!val || strstr(val, "PSK"))
1346 c->auth_suites |= IWINFO_KMGMT_PSK;
1348 if (val && strstr(val, "EAP"))
1349 c->auth_suites |= IWINFO_KMGMT_8021x;
1351 if (val && strstr(val, "NONE"))
1352 c->auth_suites |= IWINFO_KMGMT_NONE;
1354 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
1356 if (strstr(val, "TKIP"))
1357 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1359 if (strstr(val, "CCMP"))
1360 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1362 if (strstr(val, "NONE"))
1363 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1366 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1370 c->auth_algs |= IWINFO_AUTH_OPEN;
1374 c->auth_algs |= IWINFO_AUTH_SHARED;
1378 c->auth_algs |= IWINFO_AUTH_OPEN;
1379 c->auth_algs |= IWINFO_AUTH_SHARED;
1386 for (i = 0; i < 4; i++)
1388 snprintf(k, sizeof(k), "wep_key%d", i);
1390 if ((val = nl80211_getval(ifname, res, k)))
1392 if ((strlen(val) == 5) || (strlen(val) == 10))
1393 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1395 else if ((strlen(val) == 13) || (strlen(val) == 26))
1396 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1401 c->group_ciphers = c->pair_ciphers;
1402 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1410 int nl80211_get_phyname(const char *ifname, char *buf)
1414 name = nl80211_ifname2phy(ifname);
1421 else if ((name = nl80211_phy2ifname(ifname)) != NULL)
1423 name = nl80211_ifname2phy(name);
1427 strcpy(buf, ifname);
1436 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1438 struct nl80211_array_buf *arr = arg;
1439 struct iwinfo_assoclist_entry *e = arr->buf;
1440 struct nlattr **attr = nl80211_parse(msg);
1441 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1442 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1444 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1445 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1446 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1447 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1448 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1449 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1450 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1453 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1454 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1455 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1456 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1457 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1460 /* advance to end of array */
1462 memset(e, 0, sizeof(*e));
1464 if (attr[NL80211_ATTR_MAC])
1465 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1467 if (attr[NL80211_ATTR_STA_INFO] &&
1468 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1469 attr[NL80211_ATTR_STA_INFO], stats_policy))
1471 if (sinfo[NL80211_STA_INFO_SIGNAL])
1472 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1474 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1475 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1477 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1478 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1480 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1481 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1483 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1484 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1485 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1487 if (rinfo[NL80211_RATE_INFO_BITRATE])
1489 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1491 if (rinfo[NL80211_RATE_INFO_MCS])
1492 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1494 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1495 e->rx_rate.is_40mhz = 1;
1497 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1498 e->rx_rate.is_short_gi = 1;
1501 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1502 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1503 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1505 if (rinfo[NL80211_RATE_INFO_BITRATE])
1507 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1509 if (rinfo[NL80211_RATE_INFO_MCS])
1510 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1512 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1513 e->tx_rate.is_40mhz = 1;
1515 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1516 e->tx_rate.is_short_gi = 1;
1520 e->noise = 0; /* filled in by caller */
1526 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1531 struct nl80211_msg_conveyor *req;
1532 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1533 struct iwinfo_assoclist_entry *e;
1535 if ((d = opendir("/sys/class/net")) != NULL)
1537 while ((de = readdir(d)) != NULL)
1539 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1540 (!de->d_name[strlen(ifname)] ||
1541 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1543 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1548 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1556 if (!nl80211_get_noise(ifname, &noise))
1557 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1560 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1567 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1570 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1572 struct nlattr **attr = nl80211_parse(msg);
1573 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1574 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1575 struct nlattr *band, *freq;
1577 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1578 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1579 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1580 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1581 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1582 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1583 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1586 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1589 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1591 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1592 nla_len(band), NULL);
1594 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1596 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1597 nla_data(freq), nla_len(freq), freq_policy);
1599 ch_cmp = nl80211_freq2channel(nla_get_u32(
1600 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1602 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1603 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1605 *dbm_max = (int)(0.01 * nla_get_u32(
1606 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1616 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1619 int dbm_max = -1, dbm_cur, dbm_cnt;
1620 struct nl80211_msg_conveyor *req;
1621 struct iwinfo_txpwrlist_entry entry;
1623 if (nl80211_get_channel(ifname, &ch_cur))
1626 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1629 /* initialize the value pointer with channel for callback */
1632 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1638 for (dbm_cur = 0, dbm_cnt = 0;
1640 dbm_cur++, dbm_cnt++)
1642 entry.dbm = dbm_cur;
1643 entry.mw = iwinfo_dbm2mw(dbm_cur);
1645 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1648 entry.dbm = dbm_max;
1649 entry.mw = iwinfo_dbm2mw(dbm_max);
1651 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1654 *len = dbm_cnt * sizeof(entry);
1661 static void nl80211_get_scancrypto(const char *spec,
1662 struct iwinfo_crypto_entry *c)
1664 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1668 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1671 else if (strstr(spec, "WPA2"))
1674 else if (strstr(spec, "WPA"))
1677 else if (strstr(spec, "WEP"))
1678 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1681 if (strstr(spec, "PSK"))
1682 c->auth_suites |= IWINFO_KMGMT_PSK;
1684 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1685 c->auth_suites |= IWINFO_KMGMT_8021x;
1687 if (strstr(spec, "WPA-NONE"))
1688 c->auth_suites |= IWINFO_KMGMT_NONE;
1691 if (strstr(spec, "TKIP"))
1692 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1694 if (strstr(spec, "CCMP"))
1695 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1697 if (strstr(spec, "WEP-40"))
1698 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1700 if (strstr(spec, "WEP-104"))
1701 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1703 c->group_ciphers = c->pair_ciphers;
1712 struct nl80211_scanlist {
1713 struct iwinfo_scanlist_entry *e;
1718 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1719 struct iwinfo_scanlist_entry *e)
1721 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1722 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1723 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1725 while (ielen >= 2 && ielen >= ie[1])
1730 memcpy(e->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1734 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1735 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1738 case 221: /* Vendor */
1739 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1740 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1741 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1750 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1755 struct nl80211_scanlist *sl = arg;
1756 struct nlattr **tb = nl80211_parse(msg);
1757 struct nlattr *bss[NL80211_BSS_MAX + 1];
1759 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1760 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1761 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1762 [NL80211_BSS_BSSID] = { },
1763 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1764 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1765 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
1766 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1767 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1768 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1769 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1770 [NL80211_BSS_BEACON_IES] = { },
1773 if (!tb[NL80211_ATTR_BSS] ||
1774 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1776 !bss[NL80211_BSS_BSSID])
1781 if (bss[NL80211_BSS_CAPABILITY])
1782 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1786 memset(sl->e, 0, sizeof(*sl->e));
1787 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
1790 sl->e->mode = IWINFO_OPMODE_ADHOC;
1791 else if (caps & (1<<0))
1792 sl->e->mode = IWINFO_OPMODE_MASTER;
1794 sl->e->mode = IWINFO_OPMODE_MESHPOINT;
1797 sl->e->crypto.enabled = 1;
1799 if (bss[NL80211_BSS_FREQUENCY])
1800 sl->e->channel = nl80211_freq2channel(nla_get_u32(
1801 bss[NL80211_BSS_FREQUENCY]));
1803 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
1804 nl80211_get_scanlist_ie(bss, sl->e);
1806 if (bss[NL80211_BSS_SIGNAL_MBM])
1809 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
1811 rssi = sl->e->signal - 0x100;
1815 else if (rssi > -40)
1818 sl->e->quality = (rssi + 110);
1819 sl->e->quality_max = 70;
1822 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
1824 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1825 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
1834 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
1836 struct nl80211_msg_conveyor *req;
1837 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
1839 req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
1842 nl80211_send(req, NULL, NULL);
1846 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
1848 req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1851 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
1855 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
1856 return *len ? 0 : -1;
1859 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1861 int freq, rssi, qmax, count;
1863 char ssid[128] = { 0 };
1864 char bssid[18] = { 0 };
1865 char cipher[256] = { 0 };
1867 /* Got a radioX pseudo interface, find some interface on it or create one */
1868 if (!strncmp(ifname, "radio", 5))
1870 /* Reuse existing interface */
1871 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1873 return nl80211_get_scanlist(res, buf, len);
1876 /* Need to spawn a temporary iface for scanning */
1877 else if ((res = nl80211_ifadd(ifname)) != NULL)
1879 count = nl80211_get_scanlist(res, buf, len);
1885 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1887 /* WPA supplicant */
1888 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1890 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1892 nl80211_get_quality_max(ifname, &qmax);
1899 /* skip log lines */
1904 /* skip header line */
1908 if (sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1909 bssid, &freq, &rssi, cipher, ssid) < 5)
1911 /* skip malformed lines */
1915 e->mac[0] = strtol(&bssid[0], NULL, 16);
1916 e->mac[1] = strtol(&bssid[3], NULL, 16);
1917 e->mac[2] = strtol(&bssid[6], NULL, 16);
1918 e->mac[3] = strtol(&bssid[9], NULL, 16);
1919 e->mac[4] = strtol(&bssid[12], NULL, 16);
1920 e->mac[5] = strtol(&bssid[15], NULL, 16);
1923 memcpy(e->ssid, ssid, min(strlen(ssid), sizeof(e->ssid) - 1));
1925 /* Mode (assume master) */
1926 if (strstr(cipher,"[MESH]"))
1927 e->mode = IWINFO_OPMODE_MESHPOINT;
1929 e->mode = IWINFO_OPMODE_MASTER;
1932 e->channel = nl80211_freq2channel(freq);
1940 /* The cfg80211 wext compat layer assumes a signal range
1941 * of -110 dBm to -40 dBm, the quality value is derived
1942 * by adding 110 to the signal level */
1945 else if (rssi > -40)
1948 e->quality = (rssi + 110);
1956 e->quality_max = qmax;
1959 nl80211_get_scancrypto(cipher, &e->crypto);
1964 memset(ssid, 0, sizeof(ssid));
1965 memset(bssid, 0, sizeof(bssid));
1966 memset(cipher, 0, sizeof(cipher));
1969 /* advance to next line */
1970 while( *res && *res++ != '\n' );
1974 *len = count * sizeof(struct iwinfo_scanlist_entry);
1982 /* Got a temp interface, don't create yet another one */
1983 if (!strncmp(ifname, "tmp.", 4))
1985 if (!iwinfo_ifup(ifname))
1988 nl80211_get_scanlist_nl(ifname, buf, len);
1989 iwinfo_ifdown(ifname);
1993 /* Spawn a new scan interface */
1996 if (!(res = nl80211_ifadd(ifname)))
1999 if (!iwinfo_ifmac(res))
2002 /* if we can take the new interface up, the driver supports an
2003 * additional interface and there's no need to tear down the ap */
2004 if (iwinfo_ifup(res))
2006 nl80211_get_scanlist_nl(res, buf, len);
2010 /* driver cannot create secondary interface, take down ap
2012 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
2014 nl80211_get_scanlist_nl(res, buf, len);
2016 iwinfo_ifup(ifname);
2017 nl80211_hostapd_hup(ifname);
2029 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
2031 int bands_remain, freqs_remain;
2033 struct nl80211_array_buf *arr = arg;
2034 struct iwinfo_freqlist_entry *e = arr->buf;
2036 struct nlattr **attr = nl80211_parse(msg);
2037 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2038 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2039 struct nlattr *band, *freq;
2041 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2042 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2043 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2044 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2045 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2046 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2047 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2050 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2052 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2053 nla_data(band), nla_len(band), NULL);
2055 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2057 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2058 nla_data(freq), nla_len(freq), NULL);
2060 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2061 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2064 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2065 e->channel = nl80211_freq2channel(e->mhz);
2068 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
2069 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
2070 freqs[NL80211_FREQUENCY_ATTR_RADAR]
2081 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2083 struct nl80211_msg_conveyor *req;
2084 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2086 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2089 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2095 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2102 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2105 struct nlattr **attr = nl80211_parse(msg);
2107 if (attr[NL80211_ATTR_REG_ALPHA2])
2108 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2115 int nl80211_get_country(const char *ifname, char *buf)
2118 struct nl80211_msg_conveyor *req;
2120 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2123 nl80211_send(req, nl80211_get_country_cb, buf);
2133 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2136 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2137 const struct iwinfo_iso3166_label *l;
2139 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2141 e->iso3166 = l->iso3166;
2142 e->ccode[0] = (l->iso3166 / 256);
2143 e->ccode[1] = (l->iso3166 % 256);
2146 *len = (count * sizeof(struct iwinfo_country_entry));
2150 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
2153 int bands_remain, freqs_remain;
2155 struct nlattr **attr = nl80211_parse(msg);
2156 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2157 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2158 struct nlattr *band, *freq;
2162 if (attr[NL80211_ATTR_WIPHY_BANDS])
2164 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2166 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2167 nla_data(band), nla_len(band), NULL);
2169 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2170 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2172 /* Treat any nonzero capability as 11n */
2174 *modes |= IWINFO_80211_N;
2176 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2179 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2180 nla_data(freq), nla_len(freq), NULL);
2182 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2185 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2187 *modes |= IWINFO_80211_B;
2188 *modes |= IWINFO_80211_G;
2192 *modes |= IWINFO_80211_A;
2201 int nl80211_get_hwmodelist(const char *ifname, int *buf)
2203 struct nl80211_msg_conveyor *req;
2205 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2208 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
2212 return *buf ? 0 : -1;
2215 int nl80211_get_mbssid_support(const char *ifname, int *buf)
2217 /* Test whether we can create another interface */
2218 char *nif = nl80211_ifadd(ifname);
2222 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
2233 int nl80211_get_hardware_id(const char *ifname, char *buf)
2238 /* Got a radioX pseudo interface, find some interface on it or create one */
2239 if (!strncmp(ifname, "radio", 5))
2241 /* Reuse existing interface */
2242 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2244 rv = wext_get_hardware_id(res, buf);
2247 /* Need to spawn a temporary iface for finding IDs */
2248 else if ((res = nl80211_ifadd(ifname)) != NULL)
2250 rv = wext_get_hardware_id(res, buf);
2256 rv = wext_get_hardware_id(ifname, buf);
2259 /* Failed to obtain hardware IDs, search board config */
2262 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2268 static const struct iwinfo_hardware_entry *
2269 nl80211_get_hardware_entry(const char *ifname)
2271 struct iwinfo_hardware_id id;
2273 if (nl80211_get_hardware_id(ifname, (char *)&id))
2276 return iwinfo_hardware(&id);
2279 int nl80211_get_hardware_name(const char *ifname, char *buf)
2281 const struct iwinfo_hardware_entry *hw;
2283 if (!(hw = nl80211_get_hardware_entry(ifname)))
2284 sprintf(buf, "Generic MAC80211");
2286 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2291 int nl80211_get_txpower_offset(const char *ifname, int *buf)
2293 const struct iwinfo_hardware_entry *hw;
2295 if (!(hw = nl80211_get_hardware_entry(ifname)))
2298 *buf = hw->txpower_offset;
2302 int nl80211_get_frequency_offset(const char *ifname, int *buf)
2304 const struct iwinfo_hardware_entry *hw;
2306 if (!(hw = nl80211_get_hardware_entry(ifname)))
2309 *buf = hw->frequency_offset;