2 * iwinfo - Wireless Information Library - NL80211 Backend
4 * Copyright (C) 2010 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 extern struct iwinfo_iso3166_label ISO3166_Names[];
31 static struct nl80211_state *nls = NULL;
33 static int nl80211_init(void)
39 nls = malloc(sizeof(struct nl80211_state));
45 nls->nl_sock = nl_socket_alloc();
51 if( genl_connect(nls->nl_sock)) {
56 fd = nl_socket_get_fd(nls->nl_sock);
57 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");
84 static int nl80211_msg_error(struct sockaddr_nl *nla,
85 struct nlmsgerr *err, void *arg)
92 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
99 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
106 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
108 struct nl80211_msg_conveyor *cv = arg;
113 cv->hdr = nlmsg_data(nlmsg_hdr(cv->msg));
115 nla_parse(cv->attr, NL80211_ATTR_MAX,
116 genlmsg_attrdata(cv->hdr, 0),
117 genlmsg_attrlen(cv->hdr, 0), NULL);
122 static void nl80211_free(struct nl80211_msg_conveyor *cv)
137 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, int cmd, int flags)
139 static struct nl80211_msg_conveyor cv;
141 int ifidx = -1, phyidx = -1;
142 struct nl_msg *req = NULL;
143 struct nl_cb *cb = NULL;
145 if( nl80211_init() < 0 )
148 if( !strncmp(ifname, "radio", 5) )
149 phyidx = atoi(&ifname[5]);
150 else if( !strncmp(ifname, "mon.", 4) )
151 ifidx = if_nametoindex(&ifname[4]);
153 ifidx = if_nametoindex(ifname);
155 if( (ifidx < 0) && (phyidx < 0) )
162 cb = nl_cb_alloc(NL_CB_DEFAULT);
166 genlmsg_put(req, 0, 0, genl_family_get_id(nls->nl80211), 0,
170 NLA_PUT_U32(req, NL80211_ATTR_IFINDEX, ifidx);
173 NLA_PUT_U32(req, NL80211_ATTR_WIPHY, phyidx);
194 static void nl80211_cb(struct nl80211_msg_conveyor *cv,
195 int (*cb)(struct nl_msg *, void *), void *arg)
198 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb, arg);
201 static struct nl80211_msg_conveyor * nl80211_send(struct nl80211_msg_conveyor *cv)
203 static struct nl80211_msg_conveyor rcv;
207 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
209 if( nl_send_auto_complete(nls->nl_sock, cv->msg) < 0 )
212 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
213 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
214 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
217 nl_recvmsgs(nls->nl_sock, cv->cb);
228 static int nl80211_freq2channel(int freq)
234 return (freq - 2407) / 5;
236 return (freq / 5) - 1000;
239 static char * nl80211_getval(const char *buf, const char *key)
242 char lkey[64] = { 0 };
243 const char *ln = buf;
244 static char lval[256] = { 0 };
246 for( i = 0, len = strlen(buf); i < len; i++ )
248 if( !lkey[0] && (buf[i] == ' ' || buf[i] == '\t') )
252 else if( !lkey[0] && (buf[i] == '=') )
254 if( (&buf[i] - ln) > 0 )
255 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
257 else if( buf[i] == '\n' )
259 if( lkey[0] && !strcmp(lkey, key) )
261 memcpy(lval, ln + strlen(lkey) + 1,
262 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
268 memset(lkey, 0, sizeof(lkey));
269 memset(lval, 0, sizeof(lval));
276 static char * nl80211_ifname2phy(const char *ifname)
278 static char phy[32] = { 0 };
279 struct nl80211_msg_conveyor *req, *res;
281 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
284 res = nl80211_send(req);
287 if( res->attr[NL80211_ATTR_WIPHY_NAME] )
289 snprintf(phy, sizeof(phy), "%s",
290 nla_get_string(res->attr[NL80211_ATTR_WIPHY_NAME]));
297 return phy[0] ? phy : NULL;
300 static char * nl80211_hostapd_info(const char *ifname)
303 char path[32] = { 0 };
304 static char buf[4096] = { 0 };
307 if( (phy = nl80211_ifname2phy(ifname)) != NULL )
309 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
311 if( (conf = fopen(path, "r")) != NULL )
313 fread(buf, sizeof(buf) - 1, 1, conf);
323 static char * nl80211_wpasupp_info(const char *ifname, const char *cmd)
327 size_t remote_length, local_length;
328 static char buffer[1024] = { 0 };
330 struct timeval tv = { 2, 0 };
331 struct sockaddr_un local = { 0 };
332 struct sockaddr_un remote = { 0 };
336 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
340 remote.sun_family = AF_UNIX;
341 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
342 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
344 if( fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0 )
347 if( connect(sock, (struct sockaddr *) &remote, remote_length) )
350 local.sun_family = AF_UNIX;
351 local_length = sizeof(local.sun_family) + sprintf(local.sun_path,
352 "/var/run/iwinfo-%s-%d", ifname, getpid());
354 if( bind(sock, (struct sockaddr *) &local, local_length) )
357 send(sock, cmd, strlen(cmd), 0);
364 if( select(sock + 1, &rfds, NULL, NULL, &tv) < 0 )
367 if( !FD_ISSET(sock, &rfds) )
370 if( (len = recv(sock, buffer, sizeof(buffer), 0)) <= 0 )
375 if( buffer[0] != '<' )
383 unlink(local.sun_path);
389 int nl80211_probe(const char *ifname)
391 return !!nl80211_ifname2phy(ifname);
394 void nl80211_close(void)
399 nl_socket_free(nls->nl_sock);
402 nl_cache_free(nls->nl_cache);
409 int nl80211_get_mode(const char *ifname, char *buf)
411 return wext_get_mode(ifname, buf);
414 int nl80211_get_ssid(const char *ifname, char *buf)
418 if( !wext_get_ssid(ifname, buf) )
422 else if( (ssid = nl80211_hostapd_info(ifname)) &&
423 (ssid = nl80211_getval(ssid, "ssid")) )
425 memcpy(buf, ssid, strlen(ssid));
432 int nl80211_get_bssid(const char *ifname, char *buf)
435 unsigned char mac[6];
437 if( !wext_get_bssid(ifname, buf) )
441 else if( (bssid = nl80211_hostapd_info(ifname)) &&
442 (bssid = nl80211_getval(bssid, "bssid")) )
444 mac[0] = strtol(&bssid[0], NULL, 16);
445 mac[1] = strtol(&bssid[3], NULL, 16);
446 mac[2] = strtol(&bssid[6], NULL, 16);
447 mac[3] = strtol(&bssid[9], NULL, 16);
448 mac[4] = strtol(&bssid[12], NULL, 16);
449 mac[5] = strtol(&bssid[15], NULL, 16);
451 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
452 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
460 int nl80211_get_channel(const char *ifname, int *buf)
462 return wext_get_channel(ifname, buf);
465 int nl80211_get_frequency(const char *ifname, int *buf)
467 return wext_get_frequency(ifname, buf);
470 int nl80211_get_txpower(const char *ifname, int *buf)
472 return wext_get_txpower(ifname, buf);
476 static int nl80211_get_signal_cb(struct nl_msg *msg, void *arg)
480 struct nl80211_rssi_rate *rr = arg;
482 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
483 struct nlattr *attr[NL80211_ATTR_MAX + 1];
484 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
485 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
487 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
488 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
489 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
490 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
491 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
492 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
493 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
494 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
495 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
496 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
497 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
500 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
501 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
502 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
503 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
504 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
507 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
508 genlmsg_attrlen(gnlh, 0), NULL);
510 if( attr[NL80211_ATTR_STA_INFO] )
512 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
513 attr[NL80211_ATTR_STA_INFO], stats_policy) )
515 if( sinfo[NL80211_STA_INFO_SIGNAL] )
517 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
518 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
521 if( sinfo[NL80211_STA_INFO_TX_BITRATE] )
523 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
524 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
526 if( rinfo[NL80211_RATE_INFO_BITRATE] )
528 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
530 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
540 int nl80211_get_bitrate(const char *ifname, int *buf)
542 struct nl80211_rssi_rate rr;
543 struct nl80211_msg_conveyor *req;
545 if( !wext_get_bitrate(ifname, buf) )
548 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
554 nl80211_cb(req, nl80211_get_signal_cb, &rr);
560 *buf = (rr.rate * 100);
568 int nl80211_get_signal(const char *ifname, int *buf)
570 struct nl80211_rssi_rate rr;
571 struct nl80211_msg_conveyor *req;
573 if( !wext_get_signal(ifname, buf) )
576 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
582 nl80211_cb(req, nl80211_get_signal_cb, &rr);
596 int nl80211_get_noise(const char *ifname, int *buf)
599 struct nl80211_msg_conveyor *req, *res;
600 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
602 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
603 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
604 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
607 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
610 res = nl80211_send(req);
613 if( res->attr[NL80211_ATTR_SURVEY_INFO] )
615 if( !nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
616 res->attr[NL80211_ATTR_SURVEY_INFO], sp) &&
617 si[NL80211_SURVEY_INFO_NOISE] )
619 *buf = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
631 int nl80211_get_quality(const char *ifname, int *buf)
635 if( wext_get_quality(ifname, buf) )
639 if( !nl80211_get_signal(ifname, &signal) )
641 /* A positive signal level is usually just a quality
642 * value, pass through as-is */
648 /* The cfg80211 wext compat layer assumes a signal range
649 * of -110 dBm to -40 dBm, the quality value is derived
650 * by adding 110 to the signal level */
655 else if( signal > -40 )
658 *buf = (signal + 110);
666 int nl80211_get_quality_max(const char *ifname, int *buf)
668 if( wext_get_quality_max(ifname, buf) )
669 /* The cfg80211 wext compat layer assumes a maximum
676 int nl80211_get_encryption(const char *ifname, char *buf)
681 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
684 if( (res = nl80211_hostapd_info(ifname)) &&
685 nl80211_getval(res, "interface") )
687 if( (val = nl80211_getval(res, "auth_algs")) && (val > 0) )
689 c->auth_suites |= IWINFO_KMGMT_NONE;
693 c->auth_algs |= IWINFO_AUTH_OPEN;
697 c->auth_algs |= IWINFO_AUTH_SHARED;
701 c->auth_algs |= IWINFO_AUTH_OPEN;
702 c->auth_algs |= IWINFO_AUTH_SHARED;
709 for( i = 0; i < 4; i++ )
711 snprintf(k, sizeof(k), "wep_key%d", i);
713 if( (val = nl80211_getval(res, k)) )
715 if( (strlen(val) == 5) || (strlen(val) == 10) )
716 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
718 else if( (strlen(val) == 13) || (strlen(val) == 26) )
719 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
723 c->group_ciphers = c->pair_ciphers;
729 if( (val = nl80211_getval(res, "wpa")) != NULL )
730 c->wpa_version = atoi(val);
733 val = nl80211_getval(res, "wpa_key_mgmt");
735 if( !val || strstr(val, "PSK") )
736 c->auth_suites |= IWINFO_KMGMT_PSK;
738 if( val && strstr(val, "EAP") )
739 c->auth_suites |= IWINFO_KMGMT_8021x;
741 if( val && strstr(val, "NONE") )
742 c->auth_suites |= IWINFO_KMGMT_NONE;
745 if( (val = nl80211_getval(res, "wpa_pairwise")) != NULL )
747 if( strstr(val, "TKIP") )
748 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
750 if( strstr(val, "CCMP") )
751 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
753 if( strstr(val, "NONE") )
754 c->pair_ciphers |= IWINFO_CIPHER_NONE;
758 c->group_ciphers = c->pair_ciphers;
759 c->enabled = (c->auth_algs || c->auth_suites) ? 1 : 0;
765 else if( (res = nl80211_wpasupp_info(ifname, "STATUS")) &&
766 (val = nl80211_getval(res, "pairwise_cipher")) )
769 if( strstr(val, "WEP") )
771 if( strstr(val, "WEP-40") )
772 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
774 else if( strstr(val, "WEP-104") )
775 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
778 c->group_ciphers = c->pair_ciphers;
780 c->auth_suites |= IWINFO_KMGMT_NONE;
781 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
787 if( strstr(val, "TKIP") )
788 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
790 else if( strstr(val, "CCMP") )
791 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
793 else if( strstr(val, "NONE") )
794 c->pair_ciphers |= IWINFO_CIPHER_NONE;
796 else if( strstr(val, "WEP-40") )
797 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
799 else if( strstr(val, "WEP-104") )
800 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
803 if( (val = nl80211_getval(res, "group_cipher")) )
805 if( strstr(val, "TKIP") )
806 c->group_ciphers |= IWINFO_CIPHER_TKIP;
808 else if( strstr(val, "CCMP") )
809 c->group_ciphers |= IWINFO_CIPHER_CCMP;
811 else if( strstr(val, "NONE") )
812 c->group_ciphers |= IWINFO_CIPHER_NONE;
814 else if( strstr(val, "WEP-40") )
815 c->group_ciphers |= IWINFO_CIPHER_WEP40;
817 else if( strstr(val, "WEP-104") )
818 c->group_ciphers |= IWINFO_CIPHER_WEP104;
822 if( (val = nl80211_getval(res, "key_mgmt")) )
824 if( strstr(val, "WPA2") )
827 else if( strstr(val, "WPA") )
831 if( strstr(val, "PSK") )
832 c->auth_suites |= IWINFO_KMGMT_PSK;
834 else if( strstr(val, "EAP") || strstr(val, "802.1X") )
835 c->auth_suites |= IWINFO_KMGMT_8021x;
837 else if( strstr(val, "NONE") )
838 c->auth_suites |= IWINFO_KMGMT_NONE;
841 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
851 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
853 struct nl80211_assoc_count *ac = arg;
854 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
855 struct nlattr *attr[NL80211_ATTR_MAX + 1];
856 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
858 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
859 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
860 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
861 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
862 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
863 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
864 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
865 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
866 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
867 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
868 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
871 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
872 genlmsg_attrlen(gnlh, 0), NULL);
874 if( attr[NL80211_ATTR_MAC] )
875 memcpy(ac->entry->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
877 if( attr[NL80211_ATTR_STA_INFO] )
879 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
880 attr[NL80211_ATTR_STA_INFO], stats_policy) )
882 if( sinfo[NL80211_STA_INFO_SIGNAL] )
883 ac->entry->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
887 ac->entry->noise = ac->noise;
894 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
896 struct nl80211_assoc_count ac;
897 struct nl80211_msg_conveyor *req;
899 nl80211_get_noise(ifname, &ac.noise);
901 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
905 ac.entry = (struct iwinfo_assoclist_entry *)buf;
907 nl80211_cb(req, nl80211_get_assoclist_cb, &ac);
911 *len = (ac.count * sizeof(struct iwinfo_assoclist_entry));
918 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
920 int ch_cur, ch_cmp, bands_remain, freqs_remain;
921 int dbm_max = -1, dbm_cur, dbm_cnt;
922 struct nl80211_msg_conveyor *req, *res;
923 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
924 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
925 struct nlattr *band, *freq;
926 struct iwinfo_txpwrlist_entry entry;
928 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
929 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
930 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
931 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
932 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
933 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
934 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
937 if( nl80211_get_channel(ifname, &ch_cur) )
940 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
943 res = nl80211_send(req);
946 nla_for_each_nested(band,
947 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
949 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
950 nla_len(band), NULL);
952 nla_for_each_nested(freq,
953 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
955 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
956 nla_data(freq), nla_len(freq), freq_policy);
958 ch_cmp = nl80211_freq2channel(
959 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
961 if( (!ch_cur || (ch_cmp == ch_cur)) &&
962 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
964 dbm_max = (int)(0.01 * nla_get_u32(
965 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
979 for( dbm_cur = 0, dbm_cnt = 0;
981 dbm_cur += 2, dbm_cnt++ )
984 entry.mw = wext_dbm2mw(dbm_cur);
986 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
990 entry.mw = wext_dbm2mw(dbm_max);
992 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
995 *len = dbm_cnt * sizeof(entry);
1002 static void nl80211_get_scancrypto(const char *spec,
1003 struct iwinfo_crypto_entry *c)
1005 if( strstr(spec, "OPEN") )
1013 if( strstr(spec, "WPA2-") && strstr(spec, "WPA-") )
1016 else if( strstr(spec, "WPA2") )
1019 else if( strstr(spec, "WPA") )
1022 else if( strstr(spec, "WEP") )
1023 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1026 if( strstr(spec, "PSK") )
1027 c->auth_suites |= IWINFO_KMGMT_PSK;
1029 if( strstr(spec, "802.1X") || strstr(spec, "EAP") )
1030 c->auth_suites |= IWINFO_KMGMT_8021x;
1032 if( strstr(spec, "WPA-NONE") )
1033 c->auth_suites |= IWINFO_KMGMT_NONE;
1036 if( strstr(spec, "TKIP") )
1037 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1039 if( strstr(spec, "CCMP") )
1040 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1042 if( strstr(spec, "WEP-40") )
1043 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1045 if( strstr(spec, "WEP-104") )
1046 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1048 c->group_ciphers = c->pair_ciphers;
1052 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1054 int freq, rssi, qmax, count;
1057 char ssid[128] = { 0 };
1058 char bssid[18] = { 0 };
1059 char cipher[256] = { 0 };
1061 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1063 /* WPA supplicant */
1064 if( (res = nl80211_wpasupp_info(ifname, "SCAN")) &&
1065 !strcmp(res, "OK\n") )
1069 if( (res = nl80211_wpasupp_info(ifname, "SCAN_RESULTS")) )
1071 nl80211_get_quality_max(ifname, &qmax);
1073 /* skip header line */
1074 while( *res++ != '\n' );
1078 while( sscanf(res, "%17s %d %d %255s %127[^\n]\n",
1079 bssid, &freq, &rssi, cipher, ssid) > 0 )
1082 e->mac[0] = strtol(&bssid[0], NULL, 16);
1083 e->mac[1] = strtol(&bssid[3], NULL, 16);
1084 e->mac[2] = strtol(&bssid[6], NULL, 16);
1085 e->mac[3] = strtol(&bssid[9], NULL, 16);
1086 e->mac[4] = strtol(&bssid[12], NULL, 16);
1087 e->mac[5] = strtol(&bssid[15], NULL, 16);
1090 memcpy(e->ssid, ssid,
1091 min(strlen(ssid), sizeof(e->ssid) - 1));
1093 /* Mode (assume master) */
1094 sprintf((char *)e->mode, "Master");
1097 e->channel = nl80211_freq2channel(freq);
1105 /* The cfg80211 wext compat layer assumes a signal range
1106 * of -110 dBm to -40 dBm, the quality value is derived
1107 * by adding 110 to the signal level */
1110 else if( rssi > -40 )
1113 e->quality = (rssi + 110);
1121 e->quality_max = qmax;
1124 nl80211_get_scancrypto(cipher, &e->crypto);
1126 /* advance to next line */
1127 while( *res && *res++ != '\n' );
1133 *len = count * sizeof(struct iwinfo_scanlist_entry);
1141 if( (res = nl80211_ifname2phy(ifname)) != NULL )
1144 * This is a big ugly hack, just look away.
1147 sprintf(cmd, "ifconfig %s down 2>/dev/null", ifname);
1148 if( WEXITSTATUS(system(cmd)) )
1151 sprintf(cmd, "iw phy %s interface add scan.%s "
1152 "type station 2>/dev/null", res, ifname);
1153 if( WEXITSTATUS(system(cmd)) )
1156 sprintf(cmd, "ifconfig scan.%s up 2>/dev/null", ifname);
1157 if( WEXITSTATUS(system(cmd)) )
1160 sprintf(cmd, "scan.%s", ifname);
1161 wext_get_scanlist(cmd, buf, len);
1164 sprintf(cmd, "ifconfig scan.%s down 2>/dev/null", ifname);
1165 (void) WEXITSTATUS(system(cmd));
1167 sprintf(cmd, "iw dev scan.%s del 2>/dev/null", ifname);
1168 (void) WEXITSTATUS(system(cmd));
1170 sprintf(cmd, "ifconfig %s up 2>/dev/null", ifname);
1171 (void) WEXITSTATUS(system(cmd));
1173 sprintf(cmd, "killall -HUP hostapd 2>/dev/null");
1174 (void) WEXITSTATUS(system(cmd));
1183 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1186 int count = 0, bands_remain, freqs_remain;
1187 struct nl80211_msg_conveyor *req, *res;
1188 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1189 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1190 struct nlattr *band, *freq;
1191 struct iwinfo_freqlist_entry *e = (struct iwinfo_freqlist_entry *)buf;
1193 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1194 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1195 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1196 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1197 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1198 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1199 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1202 if( !wext_get_freqlist(ifname, buf, len) )
1205 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1208 res = nl80211_send(req);
1211 nla_for_each_nested(band,
1212 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1214 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1215 nla_len(band), NULL);
1217 nla_for_each_nested(freq,
1218 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1220 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1221 nla_data(freq), nla_len(freq), freq_policy);
1223 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1224 e->channel = nl80211_freq2channel(e->mhz);
1237 *len = count * sizeof(struct iwinfo_freqlist_entry);
1244 int nl80211_get_country(const char *ifname, char *buf)
1247 struct nl80211_msg_conveyor *req, *res;
1249 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1252 res = nl80211_send(req);
1255 if( res->attr[NL80211_ATTR_REG_ALPHA2] )
1257 memcpy(buf, nla_data(res->attr[NL80211_ATTR_REG_ALPHA2]), 2);
1268 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1271 struct iwinfo_iso3166_label *l;
1272 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1274 for( l = ISO3166_Names, count = 0; l->iso3166; l++, e++, count++ )
1276 e->iso3166 = l->iso3166;
1277 e->ccode[0] = (l->iso3166 / 256);
1278 e->ccode[1] = (l->iso3166 % 256);
1281 *len = (count * sizeof(struct iwinfo_country_entry));
1285 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1287 /* We assume that multi bssid is always possible */