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");
80 if( nls && nls->nl_sock )
81 nl_socket_free(nls->nl_sock);
83 if( nls && nls->nl_cache )
84 nl_cache_free(nls->nl_cache);
94 static int nl80211_msg_error(struct sockaddr_nl *nla,
95 struct nlmsgerr *err, void *arg)
102 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
109 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
116 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
118 struct nl80211_msg_conveyor *cv = arg;
123 cv->hdr = nlmsg_data(nlmsg_hdr(cv->msg));
125 nla_parse(cv->attr, NL80211_ATTR_MAX,
126 genlmsg_attrdata(cv->hdr, 0),
127 genlmsg_attrlen(cv->hdr, 0), NULL);
132 static void nl80211_free(struct nl80211_msg_conveyor *cv)
141 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, int cmd, int flags)
143 static struct nl80211_msg_conveyor cv;
146 struct nl_msg *req = NULL;
147 struct nl_cb *cb = NULL;
149 if( nl80211_init() < 0 )
152 if( !strncmp(ifname, "mon.", 4) )
153 ifidx = if_nametoindex(&ifname[4]);
155 ifidx = if_nametoindex(ifname);
164 cb = nl_cb_alloc(NL_CB_DEFAULT);
168 genlmsg_put(req, 0, 0, genl_family_get_id(nls->nl80211), 0,
171 NLA_PUT_U32(req, NL80211_ATTR_IFINDEX, ifidx);
192 static void nl80211_cb(struct nl80211_msg_conveyor *cv,
193 int (*cb)(struct nl_msg *, void *), void *arg)
196 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb, arg);
199 static struct nl80211_msg_conveyor * nl80211_send(struct nl80211_msg_conveyor *cv)
201 static struct nl80211_msg_conveyor rcv;
205 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
207 if( nl_send_auto_complete(nls->nl_sock, cv->msg) < 0 )
210 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
211 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
212 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
215 nl_recvmsgs(nls->nl_sock, cv->cb);
226 static int nl80211_freq2channel(int freq)
232 return (freq - 2407) / 5;
234 return (freq / 5) - 1000;
237 static char * nl80211_getval(const char *buf, const char *key)
240 char lkey[64] = { 0 };
241 const char *ln = buf;
242 static char lval[256] = { 0 };
244 for( i = 0, len = strlen(buf); i < len; i++ )
246 if( !lkey[0] && (buf[i] == ' ' || buf[i] == '\t') )
250 else if( !lkey[0] && (buf[i] == '=') )
252 if( (&buf[i] - ln) > 0 )
253 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
255 else if( buf[i] == '\n' )
257 if( lkey[0] && !strcmp(lkey, key) )
259 memcpy(lval, ln + strlen(lkey) + 1,
260 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
266 memset(lkey, 0, sizeof(lkey));
267 memset(lval, 0, sizeof(lval));
274 static char * nl80211_ifname2phy(const char *ifname)
276 static char phy[32] = { 0 };
277 struct nl80211_msg_conveyor *req, *res;
279 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
282 res = nl80211_send(req);
285 if( res->attr[NL80211_ATTR_WIPHY_NAME] )
287 snprintf(phy, sizeof(phy), "%s",
288 nla_get_string(res->attr[NL80211_ATTR_WIPHY_NAME]));
295 return phy[0] ? phy : NULL;
298 static char * nl80211_hostapd_info(const char *ifname)
301 char path[32] = { 0 };
302 static char buf[4096] = { 0 };
305 if( (phy = nl80211_ifname2phy(ifname)) != NULL )
307 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
309 if( (conf = fopen(path, "r")) != NULL )
311 fread(buf, sizeof(buf) - 1, 1, conf);
321 static char * nl80211_wpasupp_info(const char *ifname, const char *cmd)
325 size_t remote_length, local_length;
326 static char buffer[1024] = { 0 };
328 struct timeval tv = { 2, 0 };
329 struct sockaddr_un local = { 0 };
330 struct sockaddr_un remote = { 0 };
334 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
338 remote.sun_family = AF_UNIX;
339 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
340 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
342 if( fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0 )
345 if( connect(sock, (struct sockaddr *) &remote, remote_length) )
348 local.sun_family = AF_UNIX;
349 local_length = sizeof(local.sun_family) + sprintf(local.sun_path,
350 "/var/run/iwinfo-%s-%d", ifname, getpid());
352 if( bind(sock, (struct sockaddr *) &local, local_length) )
355 send(sock, cmd, strlen(cmd), 0);
362 if( select(sock + 1, &rfds, NULL, NULL, &tv) < 0 )
365 if( !FD_ISSET(sock, &rfds) )
368 if( (len = recv(sock, buffer, sizeof(buffer), 0)) <= 0 )
373 if( buffer[0] != '<' )
381 unlink(local.sun_path);
387 int nl80211_probe(const char *ifname)
389 return !!nl80211_ifname2phy(ifname);
392 int nl80211_get_mode(const char *ifname, char *buf)
394 return wext_get_mode(ifname, buf);
397 int nl80211_get_ssid(const char *ifname, char *buf)
401 if( !wext_get_ssid(ifname, buf) )
405 else if( (ssid = nl80211_hostapd_info(ifname)) &&
406 (ssid = nl80211_getval(ssid, "ssid")) )
408 memcpy(buf, ssid, strlen(ssid));
415 int nl80211_get_bssid(const char *ifname, char *buf)
418 unsigned char mac[6];
420 if( !wext_get_bssid(ifname, buf) )
424 else if( (bssid = nl80211_hostapd_info(ifname)) &&
425 (bssid = nl80211_getval(bssid, "bssid")) )
427 mac[0] = strtol(&bssid[0], NULL, 16);
428 mac[1] = strtol(&bssid[3], NULL, 16);
429 mac[2] = strtol(&bssid[6], NULL, 16);
430 mac[3] = strtol(&bssid[9], NULL, 16);
431 mac[4] = strtol(&bssid[12], NULL, 16);
432 mac[5] = strtol(&bssid[15], NULL, 16);
434 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
435 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
443 int nl80211_get_channel(const char *ifname, int *buf)
445 return wext_get_channel(ifname, buf);
448 int nl80211_get_frequency(const char *ifname, int *buf)
450 return wext_get_frequency(ifname, buf);
453 int nl80211_get_txpower(const char *ifname, int *buf)
455 return wext_get_txpower(ifname, buf);
459 static int nl80211_get_signal_cb(struct nl_msg *msg, void *arg)
463 struct nl80211_rssi_rate *rr = arg;
465 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
466 struct nlattr *attr[NL80211_ATTR_MAX + 1];
467 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
468 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
470 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
471 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
472 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
473 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
474 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
475 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
476 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
477 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
478 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
479 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
480 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
483 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
484 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
485 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
486 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
487 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
490 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
491 genlmsg_attrlen(gnlh, 0), NULL);
493 if( attr[NL80211_ATTR_STA_INFO] )
495 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
496 attr[NL80211_ATTR_STA_INFO], stats_policy) )
498 if( sinfo[NL80211_STA_INFO_SIGNAL] )
500 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
501 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
504 if( sinfo[NL80211_STA_INFO_TX_BITRATE] )
506 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
507 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
509 if( rinfo[NL80211_RATE_INFO_BITRATE] )
511 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
513 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
523 int nl80211_get_bitrate(const char *ifname, int *buf)
525 struct nl80211_rssi_rate rr;
526 struct nl80211_msg_conveyor *req;
528 if( !wext_get_bitrate(ifname, buf) )
531 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
537 nl80211_cb(req, nl80211_get_signal_cb, &rr);
543 *buf = (rr.rate * 100);
551 int nl80211_get_signal(const char *ifname, int *buf)
553 struct nl80211_rssi_rate rr;
554 struct nl80211_msg_conveyor *req;
556 if( !wext_get_signal(ifname, buf) )
559 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
565 nl80211_cb(req, nl80211_get_signal_cb, &rr);
579 int nl80211_get_noise(const char *ifname, int *buf)
581 struct nl80211_msg_conveyor *req, *res;
582 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
584 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
585 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
586 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
589 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
592 res = nl80211_send(req);
595 if( res->attr[NL80211_ATTR_SURVEY_INFO] )
597 if( !nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
598 res->attr[NL80211_ATTR_SURVEY_INFO], sp) )
600 *buf = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
612 int nl80211_get_quality(const char *ifname, int *buf)
616 if( wext_get_quality(ifname, buf) )
620 if( !nl80211_get_signal(ifname, &signal) )
622 /* A positive signal level is usually just a quality
623 * value, pass through as-is */
629 /* The cfg80211 wext compat layer assumes a signal range
630 * of -110 dBm to -40 dBm, the quality value is derived
631 * by adding 110 to the signal level */
636 else if( signal > -40 )
639 *buf = (signal + 110);
647 int nl80211_get_quality_max(const char *ifname, int *buf)
649 if( wext_get_quality_max(ifname, buf) )
650 /* The cfg80211 wext compat layer assumes a maximum
657 int nl80211_get_encryption(const char *ifname, char *buf)
662 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
665 if( (res = nl80211_hostapd_info(ifname)) &&
666 nl80211_getval(res, "interface") )
668 if( (val = nl80211_getval(res, "auth_algs")) && (val > 0) )
670 c->auth_suites |= IWINFO_KMGMT_NONE;
674 c->auth_algs |= IWINFO_AUTH_OPEN;
678 c->auth_algs |= IWINFO_AUTH_SHARED;
682 c->auth_algs |= IWINFO_AUTH_OPEN;
683 c->auth_algs |= IWINFO_AUTH_SHARED;
690 for( i = 0; i < 4; i++ )
692 snprintf(k, sizeof(k), "wep_key%d", i);
694 if( (val = nl80211_getval(res, k)) )
696 if( (strlen(val) == 5) || (strlen(val) == 10) )
697 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
699 else if( (strlen(val) == 13) || (strlen(val) == 26) )
700 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
704 c->group_ciphers = c->pair_ciphers;
710 if( (val = nl80211_getval(res, "wpa")) != NULL )
711 c->wpa_version = atoi(val);
714 val = nl80211_getval(res, "wpa_key_mgmt");
716 if( !val || strstr(val, "PSK") )
717 c->auth_suites |= IWINFO_KMGMT_PSK;
719 if( val && strstr(val, "EAP") )
720 c->auth_suites |= IWINFO_KMGMT_8021x;
722 if( val && strstr(val, "NONE") )
723 c->auth_suites |= IWINFO_KMGMT_NONE;
726 if( (val = nl80211_getval(res, "wpa_pairwise")) != NULL )
728 if( strstr(val, "TKIP") )
729 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
731 if( strstr(val, "CCMP") )
732 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
734 if( strstr(val, "NONE") )
735 c->pair_ciphers |= IWINFO_CIPHER_NONE;
739 c->group_ciphers = c->pair_ciphers;
740 c->enabled = (c->auth_algs || c->auth_suites) ? 1 : 0;
746 else if( (res = nl80211_wpasupp_info(ifname, "STATUS")) &&
747 (val = nl80211_getval(res, "pairwise_cipher")) )
750 if( strstr(val, "WEP") )
752 if( strstr(val, "WEP-40") )
753 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
755 else if( strstr(val, "WEP-104") )
756 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
759 c->group_ciphers = c->pair_ciphers;
761 c->auth_suites |= IWINFO_KMGMT_NONE;
762 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
768 if( strstr(val, "TKIP") )
769 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
771 else if( strstr(val, "CCMP") )
772 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
774 else if( strstr(val, "NONE") )
775 c->pair_ciphers |= IWINFO_CIPHER_NONE;
777 else if( strstr(val, "WEP-40") )
778 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
780 else if( strstr(val, "WEP-104") )
781 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
784 if( (val = nl80211_getval(res, "group_cipher")) )
786 if( strstr(val, "TKIP") )
787 c->group_ciphers |= IWINFO_CIPHER_TKIP;
789 else if( strstr(val, "CCMP") )
790 c->group_ciphers |= IWINFO_CIPHER_CCMP;
792 else if( strstr(val, "NONE") )
793 c->group_ciphers |= IWINFO_CIPHER_NONE;
795 else if( strstr(val, "WEP-40") )
796 c->group_ciphers |= IWINFO_CIPHER_WEP40;
798 else if( strstr(val, "WEP-104") )
799 c->group_ciphers |= IWINFO_CIPHER_WEP104;
803 if( (val = nl80211_getval(res, "key_mgmt")) )
805 if( strstr(val, "WPA2") )
808 else if( strstr(val, "WPA") )
812 if( strstr(val, "PSK") )
813 c->auth_suites |= IWINFO_KMGMT_PSK;
815 else if( strstr(val, "EAP") || strstr(val, "802.1X") )
816 c->auth_suites |= IWINFO_KMGMT_8021x;
818 else if( strstr(val, "NONE") )
819 c->auth_suites |= IWINFO_KMGMT_NONE;
822 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
832 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
834 struct nl80211_assoc_count *ac = arg;
835 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
836 struct nlattr *attr[NL80211_ATTR_MAX + 1];
837 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
839 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
840 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
841 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
842 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
843 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
844 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
845 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
846 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
847 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
848 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
849 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
852 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
853 genlmsg_attrlen(gnlh, 0), NULL);
855 if( attr[NL80211_ATTR_MAC] )
856 memcpy(ac->entry->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
858 if( attr[NL80211_ATTR_STA_INFO] )
860 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
861 attr[NL80211_ATTR_STA_INFO], stats_policy) )
863 if( sinfo[NL80211_STA_INFO_SIGNAL] )
864 ac->entry->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
868 ac->entry->noise = ac->noise;
875 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
877 struct nl80211_assoc_count ac;
878 struct nl80211_msg_conveyor *req;
880 nl80211_get_noise(ifname, &ac.noise);
882 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
886 ac.entry = (struct iwinfo_assoclist_entry *)buf;
888 nl80211_cb(req, nl80211_get_assoclist_cb, &ac);
892 *len = (ac.count * sizeof(struct iwinfo_assoclist_entry));
899 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
901 int ch_cur, ch_cmp, bands_remain, freqs_remain;
902 int dbm_max = -1, dbm_cur, dbm_cnt;
903 struct nl80211_msg_conveyor *req, *res;
904 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
905 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
906 struct nlattr *band, *freq;
907 struct iwinfo_txpwrlist_entry entry;
909 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
910 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
911 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
912 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
913 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
914 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
915 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
918 if( nl80211_get_channel(ifname, &ch_cur) )
921 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
924 res = nl80211_send(req);
927 nla_for_each_nested(band,
928 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
930 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
931 nla_len(band), NULL);
933 nla_for_each_nested(freq,
934 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
936 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
937 nla_data(freq), nla_len(freq), freq_policy);
939 ch_cmp = nl80211_freq2channel(
940 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
942 if( (ch_cmp == ch_cur) &&
943 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
945 dbm_max = (int)(0.01 * nla_get_u32(
946 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
960 for( dbm_cur = 0, dbm_cnt = 0;
962 dbm_cur += 2, dbm_cnt++ )
965 entry.mw = wext_dbm2mw(dbm_cur);
967 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
971 entry.mw = wext_dbm2mw(dbm_max);
973 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
976 *len = dbm_cnt * sizeof(entry);
983 static void nl80211_get_scancrypto(const char *spec,
984 struct iwinfo_crypto_entry *c)
986 if( strstr(spec, "OPEN") )
994 if( strstr(spec, "WPA2-") && strstr(spec, "WPA-") )
997 else if( strstr(spec, "WPA2") )
1000 else if( strstr(spec, "WPA") )
1003 else if( strstr(spec, "WEP") )
1004 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1007 if( strstr(spec, "PSK") )
1008 c->auth_suites |= IWINFO_KMGMT_PSK;
1010 if( strstr(spec, "802.1X") || strstr(spec, "EAP") )
1011 c->auth_suites |= IWINFO_KMGMT_8021x;
1013 if( strstr(spec, "WPA-NONE") )
1014 c->auth_suites |= IWINFO_KMGMT_NONE;
1017 if( strstr(spec, "TKIP") )
1018 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1020 if( strstr(spec, "CCMP") )
1021 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1023 if( strstr(spec, "WEP-40") )
1024 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1026 if( strstr(spec, "WEP-104") )
1027 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1029 c->group_ciphers = c->pair_ciphers;
1033 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1035 int freq, rssi, qmax, count;
1038 char ssid[128] = { 0 };
1039 char bssid[18] = { 0 };
1040 char cipher[256] = { 0 };
1042 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1044 /* WPA supplicant */
1045 if( (res = nl80211_wpasupp_info(ifname, "SCAN")) &&
1046 !strcmp(res, "OK\n") )
1050 if( (res = nl80211_wpasupp_info(ifname, "SCAN_RESULTS")) )
1052 nl80211_get_quality_max(ifname, &qmax);
1054 /* skip header line */
1055 while( *res++ != '\n' );
1059 while( sscanf(res, "%17s %d %d %255s %127[^\n]\n",
1060 bssid, &freq, &rssi, cipher, ssid) > 0 )
1063 e->mac[0] = strtol(&bssid[0], NULL, 16);
1064 e->mac[1] = strtol(&bssid[3], NULL, 16);
1065 e->mac[2] = strtol(&bssid[6], NULL, 16);
1066 e->mac[3] = strtol(&bssid[9], NULL, 16);
1067 e->mac[4] = strtol(&bssid[12], NULL, 16);
1068 e->mac[5] = strtol(&bssid[15], NULL, 16);
1071 memcpy(e->ssid, ssid,
1072 min(strlen(ssid), sizeof(e->ssid) - 1));
1074 /* Mode (assume master) */
1075 sprintf((char *)e->mode, "Master");
1078 e->channel = nl80211_freq2channel(freq);
1086 /* The cfg80211 wext compat layer assumes a signal range
1087 * of -110 dBm to -40 dBm, the quality value is derived
1088 * by adding 110 to the signal level */
1091 else if( rssi > -40 )
1094 e->quality = (rssi + 110);
1102 e->quality_max = qmax;
1105 nl80211_get_scancrypto(cipher, &e->crypto);
1107 /* advance to next line */
1108 while( *res && *res++ != '\n' );
1114 *len = count * sizeof(struct iwinfo_scanlist_entry);
1122 if( (res = nl80211_ifname2phy(ifname)) != NULL )
1125 * This is a big ugly hack, just look away.
1128 sprintf(cmd, "ifconfig %s down 2>/dev/null", ifname);
1129 if( WEXITSTATUS(system(cmd)) )
1132 sprintf(cmd, "iw phy %s interface add scan.%s "
1133 "type station 2>/dev/null", res, ifname);
1134 if( WEXITSTATUS(system(cmd)) )
1137 sprintf(cmd, "ifconfig scan.%s up 2>/dev/null", ifname);
1138 if( WEXITSTATUS(system(cmd)) )
1141 sprintf(cmd, "scan.%s", ifname);
1142 wext_get_scanlist(cmd, buf, len);
1145 sprintf(cmd, "ifconfig scan.%s down 2>/dev/null", ifname);
1146 (void) WEXITSTATUS(system(cmd));
1148 sprintf(cmd, "iw dev scan.%s del 2>/dev/null", ifname);
1149 (void) WEXITSTATUS(system(cmd));
1151 sprintf(cmd, "ifconfig %s up 2>/dev/null", ifname);
1152 (void) WEXITSTATUS(system(cmd));
1154 sprintf(cmd, "killall -HUP hostapd 2>/dev/null");
1155 (void) WEXITSTATUS(system(cmd));
1164 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1166 return wext_get_freqlist(ifname, buf, len);
1169 int nl80211_get_country(const char *ifname, char *buf)
1172 struct nl80211_msg_conveyor *req, *res;
1174 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1177 res = nl80211_send(req);
1180 if( res->attr[NL80211_ATTR_REG_ALPHA2] )
1182 memcpy(buf, nla_data(res->attr[NL80211_ATTR_REG_ALPHA2]), 2);
1193 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1196 struct iwinfo_iso3166_label *l;
1197 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1199 for( l = ISO3166_Names, count = 0; l->iso3166; l++, e++, count++ )
1201 e->iso3166 = l->iso3166;
1202 e->ccode[0] = (l->iso3166 / 256);
1203 e->ccode[1] = (l->iso3166 % 256);
1206 *len = (count * sizeof(struct iwinfo_country_entry));
1210 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1212 /* We assume that multi bssid is always possible */