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 if( genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
61 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
73 if( nls && nls->nl_sock )
74 nl_socket_free(nls->nl_sock);
76 if( nls && nls->nl_cache )
77 nl_cache_free(nls->nl_cache);
87 static int nl80211_msg_error(struct sockaddr_nl *nla,
88 struct nlmsgerr *err, void *arg)
95 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
102 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
109 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
111 struct nl80211_msg_conveyor *cv = arg;
116 cv->hdr = nlmsg_data(nlmsg_hdr(cv->msg));
118 nla_parse(cv->attr, NL80211_ATTR_MAX,
119 genlmsg_attrdata(cv->hdr, 0),
120 genlmsg_attrlen(cv->hdr, 0), NULL);
125 static void nl80211_free(struct nl80211_msg_conveyor *cv)
134 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, int cmd, int flags)
136 static struct nl80211_msg_conveyor cv;
139 struct nl_msg *req = NULL;
140 struct nl_cb *cb = NULL;
142 if( nl80211_init() < 0 )
145 if( !strncmp(ifname, "mon.", 4) )
146 ifidx = if_nametoindex(&ifname[4]);
148 ifidx = if_nametoindex(ifname);
157 cb = nl_cb_alloc(NL_CB_DEFAULT);
161 genlmsg_put(req, 0, 0, genl_family_get_id(nls->nl80211), 0,
164 NLA_PUT_U32(req, NL80211_ATTR_IFINDEX, ifidx);
185 static void nl80211_cb(struct nl80211_msg_conveyor *cv,
186 int (*cb)(struct nl_msg *, void *), void *arg)
189 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb, arg);
192 static struct nl80211_msg_conveyor * nl80211_send(struct nl80211_msg_conveyor *cv)
194 static struct nl80211_msg_conveyor rcv;
198 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
200 if( nl_send_auto_complete(nls->nl_sock, cv->msg) < 0 )
203 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
204 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
205 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
208 nl_recvmsgs(nls->nl_sock, cv->cb);
219 static int nl80211_freq2channel(int freq)
225 return (freq - 2407) / 5;
227 return (freq / 5) - 1000;
230 static char * nl80211_getval(const char *buf, const char *key)
233 char lkey[64] = { 0 };
234 const char *ln = buf;
235 static char lval[256] = { 0 };
237 for( i = 0, len = strlen(buf); i < len; i++ )
239 if( !lkey[0] && (buf[i] == ' ' || buf[i] == '\t') )
243 else if( !lkey[0] && (buf[i] == '=') )
245 if( (&buf[i] - ln) > 0 )
246 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
248 else if( buf[i] == '\n' )
250 if( lkey[0] && !strcmp(lkey, key) )
252 memcpy(lval, ln + strlen(lkey) + 1,
253 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
259 memset(lkey, 0, sizeof(lkey));
260 memset(lval, 0, sizeof(lval));
267 static char * nl80211_ifname2phy(const char *ifname)
269 static char phy[32] = { 0 };
270 struct nl80211_msg_conveyor *req, *res;
272 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
275 res = nl80211_send(req);
278 if( res->attr[NL80211_ATTR_WIPHY_NAME] )
280 snprintf(phy, sizeof(phy), "%s",
281 nla_get_string(res->attr[NL80211_ATTR_WIPHY_NAME]));
288 return phy[0] ? phy : NULL;
291 static char * nl80211_hostapd_info(const char *ifname)
294 char path[32] = { 0 };
295 static char buf[4096] = { 0 };
298 if( (phy = nl80211_ifname2phy(ifname)) != NULL )
300 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
302 if( (conf = fopen(path, "r")) != NULL )
304 fread(buf, sizeof(buf) - 1, 1, conf);
314 static char * nl80211_wpasupp_info(const char *ifname, const char *cmd)
318 size_t remote_length, local_length;
319 static char buffer[1024] = { 0 };
321 struct timeval tv = { 2, 0 };
322 struct sockaddr_un local = { 0 };
323 struct sockaddr_un remote = { 0 };
327 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
331 remote.sun_family = AF_UNIX;
332 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
333 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
335 if( connect(sock, (struct sockaddr *) &remote, remote_length) )
338 local.sun_family = AF_UNIX;
339 local_length = sizeof(local.sun_family) + sprintf(local.sun_path,
340 "/var/run/iwinfo-%s-%d", ifname, getpid());
342 if( bind(sock, (struct sockaddr *) &local, local_length) )
345 send(sock, cmd, strlen(cmd), 0);
352 if( select(sock + 1, &rfds, NULL, NULL, &tv) < 0 )
355 if( !FD_ISSET(sock, &rfds) )
358 if( (len = recv(sock, buffer, sizeof(buffer), 0)) <= 0 )
363 if( buffer[0] != '<' )
371 unlink(local.sun_path);
377 int nl80211_probe(const char *ifname)
379 return !!nl80211_ifname2phy(ifname);
382 int nl80211_get_mode(const char *ifname, char *buf)
384 return wext_get_mode(ifname, buf);
387 int nl80211_get_ssid(const char *ifname, char *buf)
391 if( !wext_get_ssid(ifname, buf) )
395 else if( (ssid = nl80211_hostapd_info(ifname)) &&
396 (ssid = nl80211_getval(ssid, "ssid")) )
398 memcpy(buf, ssid, strlen(ssid));
405 int nl80211_get_bssid(const char *ifname, char *buf)
408 unsigned char mac[6];
410 if( !wext_get_bssid(ifname, buf) )
414 else if( (bssid = nl80211_hostapd_info(ifname)) &&
415 (bssid = nl80211_getval(bssid, "bssid")) )
417 mac[0] = strtol(&bssid[0], NULL, 16);
418 mac[1] = strtol(&bssid[3], NULL, 16);
419 mac[2] = strtol(&bssid[6], NULL, 16);
420 mac[3] = strtol(&bssid[9], NULL, 16);
421 mac[4] = strtol(&bssid[12], NULL, 16);
422 mac[5] = strtol(&bssid[15], NULL, 16);
424 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
425 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
433 int nl80211_get_channel(const char *ifname, int *buf)
435 return wext_get_channel(ifname, buf);
438 int nl80211_get_frequency(const char *ifname, int *buf)
440 return wext_get_frequency(ifname, buf);
443 int nl80211_get_txpower(const char *ifname, int *buf)
445 return wext_get_txpower(ifname, buf);
449 static int nl80211_get_signal_cb(struct nl_msg *msg, void *arg)
453 struct nl80211_rssi_rate *rr = arg;
455 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
456 struct nlattr *attr[NL80211_ATTR_MAX + 1];
457 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
458 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
460 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
461 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
462 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
463 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
464 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
465 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
466 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
467 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
468 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
469 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
470 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
473 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
474 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
475 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
476 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
477 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
480 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
481 genlmsg_attrlen(gnlh, 0), NULL);
483 if( attr[NL80211_ATTR_STA_INFO] )
485 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
486 attr[NL80211_ATTR_STA_INFO], stats_policy) )
488 if( sinfo[NL80211_STA_INFO_SIGNAL] )
490 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
491 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
494 if( sinfo[NL80211_STA_INFO_TX_BITRATE] )
496 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
497 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
499 if( rinfo[NL80211_RATE_INFO_BITRATE] )
501 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
503 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
513 int nl80211_get_bitrate(const char *ifname, int *buf)
515 struct nl80211_rssi_rate rr;
516 struct nl80211_msg_conveyor *req;
518 if( !wext_get_bitrate(ifname, buf) )
521 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
527 nl80211_cb(req, nl80211_get_signal_cb, &rr);
533 *buf = (rr.rate * 100);
541 int nl80211_get_signal(const char *ifname, int *buf)
543 struct nl80211_rssi_rate rr;
544 struct nl80211_msg_conveyor *req;
546 if( !wext_get_signal(ifname, buf) )
549 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
555 nl80211_cb(req, nl80211_get_signal_cb, &rr);
569 int nl80211_get_noise(const char *ifname, int *buf)
571 struct nl80211_msg_conveyor *req, *res;
572 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
574 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
575 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
576 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
579 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
582 res = nl80211_send(req);
585 if( res->attr[NL80211_ATTR_SURVEY_INFO] )
587 if( !nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
588 res->attr[NL80211_ATTR_SURVEY_INFO], sp) )
590 *buf = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
602 int nl80211_get_quality(const char *ifname, int *buf)
606 if( wext_get_quality(ifname, buf) )
610 if( !nl80211_get_signal(ifname, &signal) )
612 /* A positive signal level is usually just a quality
613 * value, pass through as-is */
619 /* The cfg80211 wext compat layer assumes a signal range
620 * of -110 dBm to -40 dBm, the quality value is derived
621 * by adding 110 to the signal level */
626 else if( signal > -40 )
629 *buf = (signal + 110);
637 int nl80211_get_quality_max(const char *ifname, int *buf)
639 if( wext_get_quality_max(ifname, buf) )
640 /* The cfg80211 wext compat layer assumes a maximum
647 int nl80211_get_encryption(const char *ifname, char *buf)
652 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
655 if( (res = nl80211_hostapd_info(ifname)) &&
656 nl80211_getval(res, "interface") )
658 if( (val = nl80211_getval(res, "auth_algs")) && (val > 0) )
660 c->auth_suites |= IWINFO_KMGMT_NONE;
664 c->auth_algs |= IWINFO_AUTH_OPEN;
668 c->auth_algs |= IWINFO_AUTH_SHARED;
672 c->auth_algs |= IWINFO_AUTH_OPEN;
673 c->auth_algs |= IWINFO_AUTH_SHARED;
680 for( i = 0; i < 4; i++ )
682 snprintf(k, sizeof(k), "wep_key%d", i);
684 if( (val = nl80211_getval(res, k)) )
686 if( (strlen(val) == 5) || (strlen(val) == 10) )
687 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
689 else if( (strlen(val) == 13) || (strlen(val) == 26) )
690 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
694 c->group_ciphers = c->pair_ciphers;
700 if( (val = nl80211_getval(res, "wpa")) != NULL )
701 c->wpa_version = atoi(val);
704 val = nl80211_getval(res, "wpa_key_mgmt");
706 if( !val || strstr(val, "PSK") )
707 c->auth_suites |= IWINFO_KMGMT_PSK;
709 if( val && strstr(val, "EAP") )
710 c->auth_suites |= IWINFO_KMGMT_8021x;
712 if( val && strstr(val, "NONE") )
713 c->auth_suites |= IWINFO_KMGMT_NONE;
716 if( (val = nl80211_getval(res, "wpa_pairwise")) != NULL )
718 if( strstr(val, "TKIP") )
719 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
721 if( strstr(val, "CCMP") )
722 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
724 if( strstr(val, "NONE") )
725 c->pair_ciphers |= IWINFO_CIPHER_NONE;
729 c->group_ciphers = c->pair_ciphers;
730 c->enabled = (c->auth_algs || c->auth_suites) ? 1 : 0;
736 else if( (res = nl80211_wpasupp_info(ifname, "STATUS")) &&
737 (val = nl80211_getval(res, "pairwise_cipher")) )
740 if( strstr(val, "WEP") )
742 if( strstr(val, "WEP-40") )
743 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
745 else if( strstr(val, "WEP-104") )
746 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
749 c->group_ciphers = c->pair_ciphers;
751 c->auth_suites |= IWINFO_KMGMT_NONE;
752 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
758 if( strstr(val, "TKIP") )
759 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
761 else if( strstr(val, "CCMP") )
762 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
764 else if( strstr(val, "NONE") )
765 c->pair_ciphers |= IWINFO_CIPHER_NONE;
767 else if( strstr(val, "WEP-40") )
768 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
770 else if( strstr(val, "WEP-104") )
771 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
774 if( (val = nl80211_getval(res, "group_cipher")) )
776 if( strstr(val, "TKIP") )
777 c->group_ciphers |= IWINFO_CIPHER_TKIP;
779 else if( strstr(val, "CCMP") )
780 c->group_ciphers |= IWINFO_CIPHER_CCMP;
782 else if( strstr(val, "NONE") )
783 c->group_ciphers |= IWINFO_CIPHER_NONE;
785 else if( strstr(val, "WEP-40") )
786 c->group_ciphers |= IWINFO_CIPHER_WEP40;
788 else if( strstr(val, "WEP-104") )
789 c->group_ciphers |= IWINFO_CIPHER_WEP104;
793 if( (val = nl80211_getval(res, "key_mgmt")) )
795 if( strstr(val, "WPA2") )
798 else if( strstr(val, "WPA") )
802 if( strstr(val, "PSK") )
803 c->auth_suites |= IWINFO_KMGMT_PSK;
805 else if( strstr(val, "EAP") || strstr(val, "802.1X") )
806 c->auth_suites |= IWINFO_KMGMT_8021x;
808 else if( strstr(val, "NONE") )
809 c->auth_suites |= IWINFO_KMGMT_NONE;
812 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
822 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
824 struct nl80211_assoc_count *ac = arg;
825 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
826 struct nlattr *attr[NL80211_ATTR_MAX + 1];
827 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
829 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
830 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
831 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
832 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
833 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
834 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
835 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
836 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
837 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
838 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
839 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
842 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
843 genlmsg_attrlen(gnlh, 0), NULL);
845 if( attr[NL80211_ATTR_MAC] )
846 memcpy(ac->entry->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
848 if( attr[NL80211_ATTR_STA_INFO] )
850 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
851 attr[NL80211_ATTR_STA_INFO], stats_policy) )
853 if( sinfo[NL80211_STA_INFO_SIGNAL] )
854 ac->entry->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
858 ac->entry->noise = ac->noise;
865 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
867 struct nl80211_assoc_count ac;
868 struct nl80211_msg_conveyor *req;
870 nl80211_get_noise(ifname, &ac.noise);
872 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
876 ac.entry = (struct iwinfo_assoclist_entry *)buf;
878 nl80211_cb(req, nl80211_get_assoclist_cb, &ac);
882 *len = (ac.count * sizeof(struct iwinfo_assoclist_entry));
889 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
891 int ch_cur, ch_cmp, bands_remain, freqs_remain;
892 int dbm_max = -1, dbm_cur, dbm_cnt;
893 struct nl80211_msg_conveyor *req, *res;
894 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
895 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
896 struct nlattr *band, *freq;
897 struct iwinfo_txpwrlist_entry entry;
899 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
900 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
901 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
902 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
903 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
904 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
905 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
908 if( nl80211_get_channel(ifname, &ch_cur) )
911 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
914 res = nl80211_send(req);
917 nla_for_each_nested(band,
918 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
920 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
921 nla_len(band), NULL);
923 nla_for_each_nested(freq,
924 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
926 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
927 nla_data(freq), nla_len(freq), freq_policy);
929 ch_cmp = nl80211_freq2channel(
930 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
932 if( (ch_cmp == ch_cur) &&
933 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
935 dbm_max = (int)(0.01 * nla_get_u32(
936 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
950 for( dbm_cur = 0, dbm_cnt = 0;
952 dbm_cur += 2, dbm_cnt++ )
955 entry.mw = wext_dbm2mw(dbm_cur);
957 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
961 entry.mw = wext_dbm2mw(dbm_max);
963 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
966 *len = dbm_cnt * sizeof(entry);
973 static void nl80211_get_scancrypto(const char *spec,
974 struct iwinfo_crypto_entry *c)
976 if( strstr(spec, "OPEN") )
984 if( strstr(spec, "WPA2-") && strstr(spec, "WPA-") )
987 else if( strstr(spec, "WPA2") )
990 else if( strstr(spec, "WPA") )
993 else if( strstr(spec, "WEP") )
994 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
997 if( strstr(spec, "PSK") )
998 c->auth_suites |= IWINFO_KMGMT_PSK;
1000 if( strstr(spec, "802.1X") || strstr(spec, "EAP") )
1001 c->auth_suites |= IWINFO_KMGMT_8021x;
1003 if( strstr(spec, "WPA-NONE") )
1004 c->auth_suites |= IWINFO_KMGMT_NONE;
1007 if( strstr(spec, "TKIP") )
1008 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1010 if( strstr(spec, "CCMP") )
1011 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1013 if( strstr(spec, "WEP-40") )
1014 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1016 if( strstr(spec, "WEP-104") )
1017 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1019 c->group_ciphers = c->pair_ciphers;
1023 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1025 int freq, rssi, qmax, count;
1028 char ssid[128] = { 0 };
1029 char bssid[18] = { 0 };
1030 char cipher[256] = { 0 };
1032 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1034 /* WPA supplicant */
1035 if( (res = nl80211_wpasupp_info(ifname, "SCAN")) &&
1036 !strcmp(res, "OK\n") )
1040 if( (res = nl80211_wpasupp_info(ifname, "SCAN_RESULTS")) )
1042 nl80211_get_quality_max(ifname, &qmax);
1044 /* skip header line */
1045 while( *res++ != '\n' );
1049 while( sscanf(res, "%17s %d %d %255s %127[^\n]\n",
1050 bssid, &freq, &rssi, cipher, ssid) > 0 )
1053 e->mac[0] = strtol(&bssid[0], NULL, 16);
1054 e->mac[1] = strtol(&bssid[3], NULL, 16);
1055 e->mac[2] = strtol(&bssid[6], NULL, 16);
1056 e->mac[3] = strtol(&bssid[9], NULL, 16);
1057 e->mac[4] = strtol(&bssid[12], NULL, 16);
1058 e->mac[5] = strtol(&bssid[15], NULL, 16);
1061 memcpy(e->ssid, ssid,
1062 min(strlen(ssid), sizeof(e->ssid) - 1));
1064 /* Mode (assume master) */
1065 sprintf((char *)e->mode, "Master");
1068 e->channel = nl80211_freq2channel(freq);
1076 /* The cfg80211 wext compat layer assumes a signal range
1077 * of -110 dBm to -40 dBm, the quality value is derived
1078 * by adding 110 to the signal level */
1081 else if( rssi > -40 )
1084 e->quality = (rssi + 110);
1092 e->quality_max = qmax;
1095 nl80211_get_scancrypto(cipher, &e->crypto);
1097 /* advance to next line */
1098 while( *res && *res++ != '\n' );
1104 *len = count * sizeof(struct iwinfo_scanlist_entry);
1112 if( (res = nl80211_ifname2phy(ifname)) != NULL )
1115 * This is a big ugly hack, just look away.
1118 sprintf(cmd, "ifconfig %s down 2>/dev/null", ifname);
1119 if( WEXITSTATUS(system(cmd)) )
1122 sprintf(cmd, "iw phy %s interface add scan.%s "
1123 "type station 2>/dev/null", res, ifname);
1124 if( WEXITSTATUS(system(cmd)) )
1127 sprintf(cmd, "ifconfig scan.%s up 2>/dev/null", ifname);
1128 if( WEXITSTATUS(system(cmd)) )
1131 sprintf(cmd, "scan.%s", ifname);
1132 wext_get_scanlist(cmd, buf, len);
1135 sprintf(cmd, "ifconfig scan.%s down 2>/dev/null", ifname);
1136 (void) WEXITSTATUS(system(cmd));
1138 sprintf(cmd, "iw dev scan.%s del 2>/dev/null", ifname);
1139 (void) WEXITSTATUS(system(cmd));
1141 sprintf(cmd, "ifconfig %s up 2>/dev/null", ifname);
1142 (void) WEXITSTATUS(system(cmd));
1144 sprintf(cmd, "killall -HUP hostapd 2>/dev/null");
1145 (void) WEXITSTATUS(system(cmd));
1154 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1156 return wext_get_freqlist(ifname, buf, len);
1159 int nl80211_get_country(const char *ifname, char *buf)
1162 struct nl80211_msg_conveyor *req, *res;
1164 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1167 res = nl80211_send(req);
1170 if( res->attr[NL80211_ATTR_REG_ALPHA2] )
1172 memcpy(buf, nla_data(res->attr[NL80211_ATTR_REG_ALPHA2]), 2);
1183 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1186 struct iwinfo_iso3166_label *l;
1187 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1189 for( l = ISO3166_Names, count = 0; l->iso3166; l++, e++, count++ )
1191 e->iso3166 = l->iso3166;
1192 e->ccode[0] = (l->iso3166 / 256);
1193 e->ccode[1] = (l->iso3166 % 256);
1196 *len = (count * sizeof(struct iwinfo_country_entry));
1200 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1202 /* We assume that multi bssid is always possible */