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 static struct nl80211_state *nls = NULL;
32 static int nl80211_init(void)
38 nls = malloc(sizeof(struct nl80211_state));
44 nls->nl_sock = nl_socket_alloc();
50 if( genl_connect(nls->nl_sock)) {
55 if( genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
60 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
72 if( nls && nls->nl_sock )
73 nl_socket_free(nls->nl_sock);
75 if( nls && nls->nl_cache )
76 nl_cache_free(nls->nl_cache);
86 static int nl80211_msg_error(struct sockaddr_nl *nla,
87 struct nlmsgerr *err, void *arg)
94 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
101 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
108 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
110 struct nl80211_msg_conveyor *cv = arg;
115 cv->hdr = nlmsg_data(nlmsg_hdr(cv->msg));
117 nla_parse(cv->attr, NL80211_ATTR_MAX,
118 genlmsg_attrdata(cv->hdr, 0),
119 genlmsg_attrlen(cv->hdr, 0), NULL);
124 static void nl80211_free(struct nl80211_msg_conveyor *cv)
133 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, int cmd, int flags)
135 static struct nl80211_msg_conveyor cv;
138 struct nl_msg *req = NULL;
139 struct nl_cb *cb = NULL;
141 if( nl80211_init() < 0 )
144 if( !strncmp(ifname, "mon.", 4) )
145 ifidx = if_nametoindex(&ifname[4]);
147 ifidx = if_nametoindex(ifname);
156 cb = nl_cb_alloc(NL_CB_DEFAULT);
160 genlmsg_put(req, 0, 0, genl_family_get_id(nls->nl80211), 0,
163 NLA_PUT_U32(req, NL80211_ATTR_IFINDEX, ifidx);
184 static void nl80211_cb(struct nl80211_msg_conveyor *cv,
185 int (*cb)(struct nl_msg *, void *), void *arg)
188 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb, arg);
191 static struct nl80211_msg_conveyor * nl80211_send(struct nl80211_msg_conveyor *cv)
193 static struct nl80211_msg_conveyor rcv;
197 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
199 if( nl_send_auto_complete(nls->nl_sock, cv->msg) < 0 )
202 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
203 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
204 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
207 nl_recvmsgs(nls->nl_sock, cv->cb);
218 static int nl80211_freq2channel(int freq)
224 return (freq - 2407) / 5;
226 return (freq / 5) - 1000;
229 static char * nl80211_getval(const char *buf, const char *key)
232 char lkey[64] = { 0 };
233 const char *ln = buf;
234 static char lval[256] = { 0 };
236 for( i = 0, len = strlen(buf); i < len; i++ )
238 if( !lkey[0] && (buf[i] == ' ' || buf[i] == '\t') )
242 else if( !lkey[0] && (buf[i] == '=') )
244 if( (&buf[i] - ln) > 0 )
245 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
247 else if( buf[i] == '\n' )
249 if( lkey[0] && !strcmp(lkey, key) )
251 memcpy(lval, ln + strlen(lkey) + 1,
252 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
258 memset(lkey, 0, sizeof(lkey));
259 memset(lval, 0, sizeof(lval));
266 static char * nl80211_ifname2phy(const char *ifname)
268 static char phy[32] = { 0 };
269 struct nl80211_msg_conveyor *req, *res;
271 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
274 res = nl80211_send(req);
277 if( res->attr[NL80211_ATTR_WIPHY_NAME] )
279 snprintf(phy, sizeof(phy), "%s",
280 nla_get_string(res->attr[NL80211_ATTR_WIPHY_NAME]));
287 return phy[0] ? phy : NULL;
290 static char * nl80211_hostapd_info(const char *ifname)
293 char path[32] = { 0 };
294 static char buf[4096] = { 0 };
297 if( (phy = nl80211_ifname2phy(ifname)) != NULL )
299 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
301 if( (conf = fopen(path, "r")) != NULL )
303 fread(buf, sizeof(buf) - 1, 1, conf);
313 static char * nl80211_wpasupp_info(const char *ifname, const char *cmd)
317 size_t remote_length, local_length;
318 static char buffer[1024] = { 0 };
320 struct timeval tv = { 2, 0 };
321 struct sockaddr_un local = { 0 };
322 struct sockaddr_un remote = { 0 };
326 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
330 remote.sun_family = AF_UNIX;
331 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
332 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
334 if( connect(sock, (struct sockaddr *) &remote, remote_length) )
337 local.sun_family = AF_UNIX;
338 local_length = sizeof(local.sun_family) + sprintf(local.sun_path,
339 "/var/run/iwinfo-%s-%d", ifname, getpid());
341 if( bind(sock, (struct sockaddr *) &local, local_length) )
344 send(sock, cmd, strlen(cmd), 0);
351 if( select(sock + 1, &rfds, NULL, NULL, &tv) < 0 )
354 if( !FD_ISSET(sock, &rfds) )
357 if( (len = recv(sock, buffer, sizeof(buffer), 0)) <= 0 )
362 if( buffer[0] != '<' )
370 unlink(local.sun_path);
376 int nl80211_probe(const char *ifname)
378 return !!nl80211_ifname2phy(ifname);
381 int nl80211_get_mode(const char *ifname, char *buf)
383 return wext_get_mode(ifname, buf);
386 int nl80211_get_ssid(const char *ifname, char *buf)
390 if( !wext_get_ssid(ifname, buf) )
394 else if( (ssid = nl80211_hostapd_info(ifname)) &&
395 (ssid = nl80211_getval(ssid, "ssid")) )
397 memcpy(buf, ssid, strlen(ssid));
404 int nl80211_get_bssid(const char *ifname, char *buf)
407 unsigned char mac[6];
409 if( !wext_get_bssid(ifname, buf) )
413 else if( (bssid = nl80211_hostapd_info(ifname)) &&
414 (bssid = nl80211_getval(bssid, "bssid")) )
416 mac[0] = strtol(&bssid[0], NULL, 16);
417 mac[1] = strtol(&bssid[3], NULL, 16);
418 mac[2] = strtol(&bssid[6], NULL, 16);
419 mac[3] = strtol(&bssid[9], NULL, 16);
420 mac[4] = strtol(&bssid[12], NULL, 16);
421 mac[5] = strtol(&bssid[15], NULL, 16);
423 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
424 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
432 int nl80211_get_channel(const char *ifname, int *buf)
434 return wext_get_channel(ifname, buf);
437 int nl80211_get_frequency(const char *ifname, int *buf)
439 return wext_get_frequency(ifname, buf);
442 int nl80211_get_txpower(const char *ifname, int *buf)
444 return wext_get_txpower(ifname, buf);
448 static int nl80211_get_signal_cb(struct nl_msg *msg, void *arg)
452 struct nl80211_rssi_rate *rr = arg;
454 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
455 struct nlattr *attr[NL80211_ATTR_MAX + 1];
456 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
457 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
459 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
460 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
461 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
462 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
463 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
464 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
465 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
466 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
467 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
468 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
469 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
472 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
473 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
474 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
475 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
476 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
479 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
480 genlmsg_attrlen(gnlh, 0), NULL);
482 if( attr[NL80211_ATTR_STA_INFO] )
484 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
485 attr[NL80211_ATTR_STA_INFO], stats_policy) )
487 if( sinfo[NL80211_STA_INFO_SIGNAL] )
489 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
490 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
493 if( sinfo[NL80211_STA_INFO_TX_BITRATE] )
495 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
496 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
498 if( rinfo[NL80211_RATE_INFO_BITRATE] )
500 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
502 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
512 int nl80211_get_bitrate(const char *ifname, int *buf)
514 struct nl80211_rssi_rate rr;
515 struct nl80211_msg_conveyor *req;
517 if( !wext_get_bitrate(ifname, buf) )
520 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
526 nl80211_cb(req, nl80211_get_signal_cb, &rr);
532 *buf = (rr.rate * 100);
540 int nl80211_get_signal(const char *ifname, int *buf)
542 struct nl80211_rssi_rate rr;
543 struct nl80211_msg_conveyor *req;
545 if( !wext_get_signal(ifname, buf) )
548 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
554 nl80211_cb(req, nl80211_get_signal_cb, &rr);
568 int nl80211_get_noise(const char *ifname, int *buf)
570 struct nl80211_msg_conveyor *req, *res;
571 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
573 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
574 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
575 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
578 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
581 res = nl80211_send(req);
584 if( res->attr[NL80211_ATTR_SURVEY_INFO] )
586 if( !nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
587 res->attr[NL80211_ATTR_SURVEY_INFO], sp) )
589 *buf = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
601 int nl80211_get_quality(const char *ifname, int *buf)
605 if( wext_get_quality(ifname, buf) )
609 if( !nl80211_get_signal(ifname, &signal) )
611 /* A positive signal level is usually just a quality
612 * value, pass through as-is */
618 /* The cfg80211 wext compat layer assumes a signal range
619 * of -110 dBm to -40 dBm, the quality value is derived
620 * by adding 110 to the signal level */
625 else if( signal > -40 )
628 *buf = (signal + 110);
636 int nl80211_get_quality_max(const char *ifname, int *buf)
638 if( wext_get_quality_max(ifname, buf) )
639 /* The cfg80211 wext compat layer assumes a maximum
646 int nl80211_get_encryption(const char *ifname, char *buf)
651 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
654 if( (res = nl80211_hostapd_info(ifname)) &&
655 nl80211_getval(res, "interface") )
657 if( (val = nl80211_getval(res, "auth_algs")) && (val > 0) )
659 c->auth_suites |= IWINFO_KMGMT_NONE;
663 c->auth_algs |= IWINFO_AUTH_OPEN;
667 c->auth_algs |= IWINFO_AUTH_SHARED;
671 c->auth_algs |= IWINFO_AUTH_OPEN;
672 c->auth_algs |= IWINFO_AUTH_SHARED;
679 for( i = 0; i < 4; i++ )
681 snprintf(k, sizeof(k), "wep_key%d", i);
683 if( (val = nl80211_getval(res, k)) )
685 if( (strlen(val) == 5) || (strlen(val) == 10) )
686 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
688 else if( (strlen(val) == 13) || (strlen(val) == 26) )
689 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
693 c->group_ciphers = c->pair_ciphers;
699 if( (val = nl80211_getval(res, "wpa")) != NULL )
700 c->wpa_version = atoi(val);
703 val = nl80211_getval(res, "wpa_key_mgmt");
705 if( !val || strstr(val, "PSK") )
706 c->auth_suites |= IWINFO_KMGMT_PSK;
708 if( val && strstr(val, "EAP") )
709 c->auth_suites |= IWINFO_KMGMT_8021x;
711 if( val && strstr(val, "NONE") )
712 c->auth_suites |= IWINFO_KMGMT_NONE;
715 if( (val = nl80211_getval(res, "wpa_pairwise")) != NULL )
717 if( strstr(val, "TKIP") )
718 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
720 if( strstr(val, "CCMP") )
721 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
723 if( strstr(val, "NONE") )
724 c->pair_ciphers |= IWINFO_CIPHER_NONE;
728 c->group_ciphers = c->pair_ciphers;
729 c->enabled = (c->auth_algs || c->auth_suites) ? 1 : 0;
735 else if( (res = nl80211_wpasupp_info(ifname, "STATUS")) &&
736 (val = nl80211_getval(res, "pairwise_cipher")) )
739 if( strstr(val, "WEP") )
741 if( strstr(val, "WEP-40") )
742 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
744 else if( strstr(val, "WEP-104") )
745 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
748 c->group_ciphers = c->pair_ciphers;
750 c->auth_suites |= IWINFO_KMGMT_NONE;
751 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
757 if( strstr(val, "TKIP") )
758 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
760 else if( strstr(val, "CCMP") )
761 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
763 else if( strstr(val, "NONE") )
764 c->pair_ciphers |= IWINFO_CIPHER_NONE;
766 else if( strstr(val, "WEP-40") )
767 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
769 else if( strstr(val, "WEP-104") )
770 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
773 if( (val = nl80211_getval(res, "group_cipher")) )
775 if( strstr(val, "TKIP") )
776 c->group_ciphers |= IWINFO_CIPHER_TKIP;
778 else if( strstr(val, "CCMP") )
779 c->group_ciphers |= IWINFO_CIPHER_CCMP;
781 else if( strstr(val, "NONE") )
782 c->group_ciphers |= IWINFO_CIPHER_NONE;
784 else if( strstr(val, "WEP-40") )
785 c->group_ciphers |= IWINFO_CIPHER_WEP40;
787 else if( strstr(val, "WEP-104") )
788 c->group_ciphers |= IWINFO_CIPHER_WEP104;
792 if( (val = nl80211_getval(res, "key_mgmt")) )
794 if( strstr(val, "WPA2") )
797 else if( strstr(val, "WPA") )
801 if( strstr(val, "PSK") )
802 c->auth_suites |= IWINFO_KMGMT_PSK;
804 else if( strstr(val, "EAP") || strstr(val, "802.1X") )
805 c->auth_suites |= IWINFO_KMGMT_8021x;
807 else if( strstr(val, "NONE") )
808 c->auth_suites |= IWINFO_KMGMT_NONE;
811 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
821 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
823 struct nl80211_assoc_count *ac = arg;
824 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
825 struct nlattr *attr[NL80211_ATTR_MAX + 1];
826 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
828 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
829 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
830 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
831 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
832 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
833 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
834 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
835 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
836 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
837 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
838 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
841 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
842 genlmsg_attrlen(gnlh, 0), NULL);
844 if( attr[NL80211_ATTR_MAC] )
845 memcpy(ac->entry->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
847 if( attr[NL80211_ATTR_STA_INFO] )
849 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
850 attr[NL80211_ATTR_STA_INFO], stats_policy) )
852 if( sinfo[NL80211_STA_INFO_SIGNAL] )
853 ac->entry->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
857 ac->entry->noise = ac->noise;
864 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
866 struct nl80211_assoc_count ac;
867 struct nl80211_msg_conveyor *req;
869 nl80211_get_noise(ifname, &ac.noise);
871 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
875 ac.entry = (struct iwinfo_assoclist_entry *)buf;
877 nl80211_cb(req, nl80211_get_assoclist_cb, &ac);
881 *len = (ac.count * sizeof(struct iwinfo_assoclist_entry));
888 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
890 int ch_cur, ch_cmp, bands_remain, freqs_remain;
891 int dbm_max = -1, dbm_cur, dbm_cnt;
892 struct nl80211_msg_conveyor *req, *res;
893 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
894 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
895 struct nlattr *band, *freq;
896 struct iwinfo_txpwrlist_entry entry;
898 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
899 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
900 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
901 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
902 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
903 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
904 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
907 if( nl80211_get_channel(ifname, &ch_cur) )
910 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
913 res = nl80211_send(req);
916 nla_for_each_nested(band,
917 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
919 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
920 nla_len(band), NULL);
922 nla_for_each_nested(freq,
923 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
925 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
926 nla_data(freq), nla_len(freq), freq_policy);
928 ch_cmp = nl80211_freq2channel(
929 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
931 if( (ch_cmp == ch_cur) &&
932 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
934 dbm_max = (int)(0.01 * nla_get_u32(
935 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
949 for( dbm_cur = 0, dbm_cnt = 0;
951 dbm_cur += 2, dbm_cnt++ )
954 entry.mw = wext_dbm2mw(dbm_cur);
956 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
960 entry.mw = wext_dbm2mw(dbm_max);
962 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
965 *len = dbm_cnt * sizeof(entry);
972 static void nl80211_get_scancrypto(const char *spec,
973 struct iwinfo_crypto_entry *c)
975 if( strstr(spec, "OPEN") )
983 if( strstr(spec, "WPA2-") && strstr(spec, "WPA-") )
986 else if( strstr(spec, "WPA2") )
989 else if( strstr(spec, "WPA") )
992 else if( strstr(spec, "WEP") )
993 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
996 if( strstr(spec, "PSK") )
997 c->auth_suites |= IWINFO_KMGMT_PSK;
999 if( strstr(spec, "802.1X") || strstr(spec, "EAP") )
1000 c->auth_suites |= IWINFO_KMGMT_8021x;
1002 if( strstr(spec, "WPA-NONE") )
1003 c->auth_suites |= IWINFO_KMGMT_NONE;
1006 if( strstr(spec, "TKIP") )
1007 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1009 if( strstr(spec, "CCMP") )
1010 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1012 if( strstr(spec, "WEP-40") )
1013 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1015 if( strstr(spec, "WEP-104") )
1016 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1018 c->group_ciphers = c->pair_ciphers;
1022 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1024 int freq, rssi, qmax, count;
1027 char ssid[128] = { 0 };
1028 char bssid[18] = { 0 };
1029 char cipher[256] = { 0 };
1031 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1033 /* WPA supplicant */
1034 if( (res = nl80211_wpasupp_info(ifname, "SCAN")) &&
1035 !strcmp(res, "OK\n") )
1039 if( (res = nl80211_wpasupp_info(ifname, "SCAN_RESULTS")) )
1041 nl80211_get_quality_max(ifname, &qmax);
1043 /* skip header line */
1044 while( *res++ != '\n' );
1048 while( sscanf(res, "%17s %d %d %255s %127[^\n]\n",
1049 bssid, &freq, &rssi, cipher, ssid) > 0 )
1052 e->mac[0] = strtol(&bssid[0], NULL, 16);
1053 e->mac[1] = strtol(&bssid[3], NULL, 16);
1054 e->mac[2] = strtol(&bssid[6], NULL, 16);
1055 e->mac[3] = strtol(&bssid[9], NULL, 16);
1056 e->mac[4] = strtol(&bssid[12], NULL, 16);
1057 e->mac[5] = strtol(&bssid[15], NULL, 16);
1060 memcpy(e->ssid, ssid,
1061 min(strlen(ssid), sizeof(e->ssid) - 1));
1063 /* Mode (assume master) */
1064 sprintf((char *)e->mode, "Master");
1067 e->channel = nl80211_freq2channel(freq);
1075 /* The cfg80211 wext compat layer assumes a signal range
1076 * of -110 dBm to -40 dBm, the quality value is derived
1077 * by adding 110 to the signal level */
1080 else if( rssi > -40 )
1083 e->quality = (rssi + 110);
1091 e->quality_max = qmax;
1094 nl80211_get_scancrypto(cipher, &e->crypto);
1096 /* advance to next line */
1097 while( *res && *res++ != '\n' );
1103 *len = count * sizeof(struct iwinfo_scanlist_entry);
1111 if( (res = nl80211_ifname2phy(ifname)) != NULL )
1114 * This is a big ugly hack, just look away.
1117 sprintf(cmd, "ifconfig %s down 2>/dev/null", ifname);
1118 if( WEXITSTATUS(system(cmd)) )
1121 sprintf(cmd, "iw phy %s interface add scan.%s "
1122 "type station 2>/dev/null", res, ifname);
1123 if( WEXITSTATUS(system(cmd)) )
1126 sprintf(cmd, "ifconfig scan.%s up 2>/dev/null", ifname);
1127 if( WEXITSTATUS(system(cmd)) )
1130 sprintf(cmd, "scan.%s", ifname);
1131 wext_get_scanlist(cmd, buf, len);
1134 sprintf(cmd, "ifconfig scan.%s down 2>/dev/null", ifname);
1135 (void) WEXITSTATUS(system(cmd));
1137 sprintf(cmd, "iw dev scan.%s del 2>/dev/null", ifname);
1138 (void) WEXITSTATUS(system(cmd));
1140 sprintf(cmd, "ifconfig %s up 2>/dev/null", ifname);
1141 (void) WEXITSTATUS(system(cmd));
1143 sprintf(cmd, "killall -HUP hostapd 2>/dev/null");
1144 (void) WEXITSTATUS(system(cmd));
1153 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1155 return wext_get_freqlist(ifname, buf, len);
1158 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1160 /* We assume that multi bssid is always possible */