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, "phy", 3) )
149 phyidx = atoi(&ifname[3]);
150 else if( !strncmp(ifname, "radio", 5) )
151 phyidx = atoi(&ifname[5]);
152 else if( !strncmp(ifname, "mon.", 4) )
153 ifidx = if_nametoindex(&ifname[4]);
155 ifidx = if_nametoindex(ifname);
157 if( (ifidx < 0) && (phyidx < 0) )
164 cb = nl_cb_alloc(NL_CB_DEFAULT);
168 genlmsg_put(req, 0, 0, genl_family_get_id(nls->nl80211), 0,
172 NLA_PUT_U32(req, NL80211_ATTR_IFINDEX, ifidx);
175 NLA_PUT_U32(req, NL80211_ATTR_WIPHY, phyidx);
196 static void nl80211_cb(struct nl80211_msg_conveyor *cv,
197 int (*cb)(struct nl_msg *, void *), void *arg)
200 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb, arg);
203 static struct nl80211_msg_conveyor * nl80211_send(struct nl80211_msg_conveyor *cv)
205 static struct nl80211_msg_conveyor rcv;
209 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
211 if( nl_send_auto_complete(nls->nl_sock, cv->msg) < 0 )
214 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
215 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
216 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
219 nl_recvmsgs(nls->nl_sock, cv->cb);
230 static int nl80211_freq2channel(int freq)
236 return (freq - 2407) / 5;
238 return (freq / 5) - 1000;
241 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
244 char lkey[64] = { 0 };
245 const char *ln = buf;
246 static char lval[256] = { 0 };
248 int matched_if = ifname ? 0 : 1;
251 for( i = 0, len = strlen(buf); i < len; i++ )
253 if( !lkey[0] && (buf[i] == ' ' || buf[i] == '\t') )
257 else if( !lkey[0] && (buf[i] == '=') )
259 if( (&buf[i] - ln) > 0 )
260 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
262 else if( buf[i] == '\n' )
266 memcpy(lval, ln + strlen(lkey) + 1,
267 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
269 if( (ifname != NULL ) &&
270 (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
272 matched_if = !strcmp(lval, ifname);
274 else if( matched_if && !strcmp(lkey, key) )
281 memset(lkey, 0, sizeof(lkey));
282 memset(lval, 0, sizeof(lval));
289 static char * nl80211_ifname2phy(const char *ifname)
291 static char phy[32] = { 0 };
292 struct nl80211_msg_conveyor *req, *res;
294 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
297 res = nl80211_send(req);
300 if( res->attr[NL80211_ATTR_WIPHY_NAME] )
302 snprintf(phy, sizeof(phy), "%s",
303 nla_get_string(res->attr[NL80211_ATTR_WIPHY_NAME]));
310 return phy[0] ? phy : NULL;
313 static char * nl80211_hostapd_info(const char *ifname)
316 char path[32] = { 0 };
317 static char buf[4096] = { 0 };
320 if( (phy = nl80211_ifname2phy(ifname)) != NULL )
322 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
324 if( (conf = fopen(path, "r")) != NULL )
326 fread(buf, sizeof(buf) - 1, 1, conf);
336 static char * nl80211_wpasupp_info(const char *ifname, const char *cmd)
340 size_t remote_length, local_length;
341 static char buffer[1024] = { 0 };
343 struct timeval tv = { 2, 0 };
344 struct sockaddr_un local = { 0 };
345 struct sockaddr_un remote = { 0 };
349 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
353 remote.sun_family = AF_UNIX;
354 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
355 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
357 if( fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0 )
360 if( connect(sock, (struct sockaddr *) &remote, remote_length) )
363 local.sun_family = AF_UNIX;
364 local_length = sizeof(local.sun_family) + sprintf(local.sun_path,
365 "/var/run/iwinfo-%s-%d", ifname, getpid());
367 if( bind(sock, (struct sockaddr *) &local, local_length) )
370 send(sock, cmd, strlen(cmd), 0);
377 if( select(sock + 1, &rfds, NULL, NULL, &tv) < 0 )
380 if( !FD_ISSET(sock, &rfds) )
383 if( (len = recv(sock, buffer, sizeof(buffer), 0)) <= 0 )
388 if( buffer[0] != '<' )
397 if( local.sun_family )
398 unlink(local.sun_path);
403 static char * nl80211_phy2ifname(const char *ifname)
407 static char nif[IFNAMSIZ] = { 0 };
412 if( !strncmp(ifname, "phy", 3) )
413 phyidx = atoi(&ifname[3]);
414 else if( !strncmp(ifname, "radio", 5) )
415 phyidx = atoi(&ifname[5]);
419 if( (d = opendir("/sys/class/net")) != NULL )
421 while( (e = readdir(d)) != NULL )
423 snprintf(buffer, sizeof(buffer),
424 "/sys/class/net/%s/phy80211/index", e->d_name);
426 if( (fd = open(buffer, O_RDONLY)) > 0 )
428 if( (read(fd, buffer, sizeof(buffer)) > 0) &&
429 (atoi(buffer) == phyidx) )
431 strncpy(nif, e->d_name, sizeof(nif));
445 return nif[0] ? nif : NULL;
448 static char * nl80211_ifadd(const char *ifname)
452 static char nif[IFNAMSIZ] = { 0 };
453 struct nl80211_msg_conveyor *req, *res;
455 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
458 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
460 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
461 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
463 res = nl80211_send(req);
477 static void nl80211_ifdel(const char *ifname)
479 struct nl80211_msg_conveyor *req;
481 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
484 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
486 nl80211_free(nl80211_send(req));
493 static void nl80211_hostapd_hup(const char *ifname)
497 char *phy = nl80211_ifname2phy(ifname);
501 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
502 if( (fd = open(buf, O_RDONLY)) > 0 )
504 if( read(fd, buf, sizeof(buf)) > 0 )
516 int nl80211_probe(const char *ifname)
518 return !!nl80211_ifname2phy(ifname);
521 void nl80211_close(void)
526 nl_socket_free(nls->nl_sock);
529 nl_cache_free(nls->nl_cache);
536 int nl80211_get_mode(const char *ifname, char *buf)
538 return wext_get_mode(ifname, buf);
541 int nl80211_get_ssid(const char *ifname, char *buf)
545 if( !wext_get_ssid(ifname, buf) )
549 else if( (ssid = nl80211_hostapd_info(ifname)) &&
550 (ssid = nl80211_getval(ifname, ssid, "ssid")) )
552 memcpy(buf, ssid, strlen(ssid));
559 int nl80211_get_bssid(const char *ifname, char *buf)
562 unsigned char mac[6];
564 if( !wext_get_bssid(ifname, buf) )
568 else if( (bssid = nl80211_hostapd_info(ifname)) &&
569 (bssid = nl80211_getval(ifname, bssid, "bssid")) )
571 mac[0] = strtol(&bssid[0], NULL, 16);
572 mac[1] = strtol(&bssid[3], NULL, 16);
573 mac[2] = strtol(&bssid[6], NULL, 16);
574 mac[3] = strtol(&bssid[9], NULL, 16);
575 mac[4] = strtol(&bssid[12], NULL, 16);
576 mac[5] = strtol(&bssid[15], NULL, 16);
578 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
579 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
587 int nl80211_get_channel(const char *ifname, int *buf)
589 return wext_get_channel(ifname, buf);
592 int nl80211_get_frequency(const char *ifname, int *buf)
594 return wext_get_frequency(ifname, buf);
597 int nl80211_get_txpower(const char *ifname, int *buf)
599 return wext_get_txpower(ifname, buf);
603 static int nl80211_get_signal_cb(struct nl_msg *msg, void *arg)
607 struct nl80211_rssi_rate *rr = arg;
609 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
610 struct nlattr *attr[NL80211_ATTR_MAX + 1];
611 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
612 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
614 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
615 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
616 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
617 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
618 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
619 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
620 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
621 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
622 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
623 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
624 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
627 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
628 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
629 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
630 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
631 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
634 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
635 genlmsg_attrlen(gnlh, 0), NULL);
637 if( attr[NL80211_ATTR_STA_INFO] )
639 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
640 attr[NL80211_ATTR_STA_INFO], stats_policy) )
642 if( sinfo[NL80211_STA_INFO_SIGNAL] )
644 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
645 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
648 if( sinfo[NL80211_STA_INFO_TX_BITRATE] )
650 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
651 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
653 if( rinfo[NL80211_RATE_INFO_BITRATE] )
655 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
657 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
667 int nl80211_get_bitrate(const char *ifname, int *buf)
669 struct nl80211_rssi_rate rr;
670 struct nl80211_msg_conveyor *req;
672 if( !wext_get_bitrate(ifname, buf) )
675 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
681 nl80211_cb(req, nl80211_get_signal_cb, &rr);
687 *buf = (rr.rate * 100);
695 int nl80211_get_signal(const char *ifname, int *buf)
697 struct nl80211_rssi_rate rr;
698 struct nl80211_msg_conveyor *req;
700 if( !wext_get_signal(ifname, buf) )
703 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
709 nl80211_cb(req, nl80211_get_signal_cb, &rr);
723 int nl80211_get_noise(const char *ifname, int *buf)
726 struct nl80211_msg_conveyor *req, *res;
727 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
729 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
730 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
731 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
734 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
737 res = nl80211_send(req);
740 if( res->attr[NL80211_ATTR_SURVEY_INFO] )
742 if( !nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
743 res->attr[NL80211_ATTR_SURVEY_INFO], sp) &&
744 si[NL80211_SURVEY_INFO_NOISE] )
746 *buf = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
758 int nl80211_get_quality(const char *ifname, int *buf)
762 if( wext_get_quality(ifname, buf) )
766 if( !nl80211_get_signal(ifname, &signal) )
768 /* A positive signal level is usually just a quality
769 * value, pass through as-is */
775 /* The cfg80211 wext compat layer assumes a signal range
776 * of -110 dBm to -40 dBm, the quality value is derived
777 * by adding 110 to the signal level */
782 else if( signal > -40 )
785 *buf = (signal + 110);
793 int nl80211_get_quality_max(const char *ifname, int *buf)
795 if( wext_get_quality_max(ifname, buf) )
796 /* The cfg80211 wext compat layer assumes a maximum
803 int nl80211_get_encryption(const char *ifname, char *buf)
808 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
811 if( (res = nl80211_hostapd_info(ifname)) )
813 if( (val = nl80211_getval(ifname, res, "auth_algs")) && (val > 0) )
815 c->auth_suites |= IWINFO_KMGMT_NONE;
819 c->auth_algs |= IWINFO_AUTH_OPEN;
823 c->auth_algs |= IWINFO_AUTH_SHARED;
827 c->auth_algs |= IWINFO_AUTH_OPEN;
828 c->auth_algs |= IWINFO_AUTH_SHARED;
835 for( i = 0; i < 4; i++ )
837 snprintf(k, sizeof(k), "wep_key%d", i);
839 if( (val = nl80211_getval(ifname, res, k)) )
841 if( (strlen(val) == 5) || (strlen(val) == 10) )
842 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
844 else if( (strlen(val) == 13) || (strlen(val) == 26) )
845 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
849 c->group_ciphers = c->pair_ciphers;
855 if( (val = nl80211_getval(ifname, res, "wpa")) != NULL )
856 c->wpa_version = atoi(val);
859 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
861 if( !val || strstr(val, "PSK") )
862 c->auth_suites |= IWINFO_KMGMT_PSK;
864 if( val && strstr(val, "EAP") )
865 c->auth_suites |= IWINFO_KMGMT_8021x;
867 if( val && strstr(val, "NONE") )
868 c->auth_suites |= IWINFO_KMGMT_NONE;
871 if( (val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL )
873 if( strstr(val, "TKIP") )
874 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
876 if( strstr(val, "CCMP") )
877 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
879 if( strstr(val, "NONE") )
880 c->pair_ciphers |= IWINFO_CIPHER_NONE;
884 c->group_ciphers = c->pair_ciphers;
885 c->enabled = (c->auth_algs || c->auth_suites) ? 1 : 0;
891 else if( (res = nl80211_wpasupp_info(ifname, "STATUS")) &&
892 (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
895 if( strstr(val, "WEP") )
897 if( strstr(val, "WEP-40") )
898 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
900 else if( strstr(val, "WEP-104") )
901 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
904 c->group_ciphers = c->pair_ciphers;
906 c->auth_suites |= IWINFO_KMGMT_NONE;
907 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
913 if( strstr(val, "TKIP") )
914 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
916 else if( strstr(val, "CCMP") )
917 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
919 else if( strstr(val, "NONE") )
920 c->pair_ciphers |= IWINFO_CIPHER_NONE;
922 else if( strstr(val, "WEP-40") )
923 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
925 else if( strstr(val, "WEP-104") )
926 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
929 if( (val = nl80211_getval(NULL, res, "group_cipher")) )
931 if( strstr(val, "TKIP") )
932 c->group_ciphers |= IWINFO_CIPHER_TKIP;
934 else if( strstr(val, "CCMP") )
935 c->group_ciphers |= IWINFO_CIPHER_CCMP;
937 else if( strstr(val, "NONE") )
938 c->group_ciphers |= IWINFO_CIPHER_NONE;
940 else if( strstr(val, "WEP-40") )
941 c->group_ciphers |= IWINFO_CIPHER_WEP40;
943 else if( strstr(val, "WEP-104") )
944 c->group_ciphers |= IWINFO_CIPHER_WEP104;
948 if( (val = nl80211_getval(NULL, res, "key_mgmt")) )
950 if( strstr(val, "WPA2") )
953 else if( strstr(val, "WPA") )
957 if( strstr(val, "PSK") )
958 c->auth_suites |= IWINFO_KMGMT_PSK;
960 else if( strstr(val, "EAP") || strstr(val, "802.1X") )
961 c->auth_suites |= IWINFO_KMGMT_8021x;
963 else if( strstr(val, "NONE") )
964 c->auth_suites |= IWINFO_KMGMT_NONE;
967 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
977 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
979 struct nl80211_assoc_count *ac = arg;
980 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
981 struct nlattr *attr[NL80211_ATTR_MAX + 1];
982 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
984 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
985 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
986 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
987 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
988 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
989 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
990 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
991 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
992 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
993 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
994 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
997 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
998 genlmsg_attrlen(gnlh, 0), NULL);
1000 if( attr[NL80211_ATTR_MAC] )
1001 memcpy(ac->entry->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1003 if( attr[NL80211_ATTR_STA_INFO] )
1005 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1006 attr[NL80211_ATTR_STA_INFO], stats_policy) )
1008 if( sinfo[NL80211_STA_INFO_SIGNAL] )
1009 ac->entry->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1013 ac->entry->noise = ac->noise;
1020 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1022 struct nl80211_assoc_count ac;
1023 struct nl80211_msg_conveyor *req;
1025 nl80211_get_noise(ifname, &ac.noise);
1027 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
1031 ac.entry = (struct iwinfo_assoclist_entry *)buf;
1033 nl80211_cb(req, nl80211_get_assoclist_cb, &ac);
1037 *len = (ac.count * sizeof(struct iwinfo_assoclist_entry));
1044 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1046 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1047 int dbm_max = -1, dbm_cur, dbm_cnt;
1048 struct nl80211_msg_conveyor *req, *res;
1049 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1050 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1051 struct nlattr *band, *freq;
1052 struct iwinfo_txpwrlist_entry entry;
1054 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1055 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1056 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1057 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1058 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1059 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1060 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1063 if( nl80211_get_channel(ifname, &ch_cur) )
1066 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1069 res = nl80211_send(req);
1072 nla_for_each_nested(band,
1073 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1075 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1076 nla_len(band), NULL);
1078 nla_for_each_nested(freq,
1079 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1081 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1082 nla_data(freq), nla_len(freq), freq_policy);
1084 ch_cmp = nl80211_freq2channel(
1085 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1087 if( (!ch_cur || (ch_cmp == ch_cur)) &&
1088 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1090 dbm_max = (int)(0.01 * nla_get_u32(
1091 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1105 for( dbm_cur = 0, dbm_cnt = 0;
1107 dbm_cur += 2, dbm_cnt++ )
1109 entry.dbm = dbm_cur;
1110 entry.mw = iwinfo_dbm2mw(dbm_cur);
1112 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1115 entry.dbm = dbm_max;
1116 entry.mw = iwinfo_dbm2mw(dbm_max);
1118 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1121 *len = dbm_cnt * sizeof(entry);
1128 static void nl80211_get_scancrypto(const char *spec,
1129 struct iwinfo_crypto_entry *c)
1131 if( strstr(spec, "OPEN") )
1139 if( strstr(spec, "WPA2-") && strstr(spec, "WPA-") )
1142 else if( strstr(spec, "WPA2") )
1145 else if( strstr(spec, "WPA") )
1148 else if( strstr(spec, "WEP") )
1149 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1152 if( strstr(spec, "PSK") )
1153 c->auth_suites |= IWINFO_KMGMT_PSK;
1155 if( strstr(spec, "802.1X") || strstr(spec, "EAP") )
1156 c->auth_suites |= IWINFO_KMGMT_8021x;
1158 if( strstr(spec, "WPA-NONE") )
1159 c->auth_suites |= IWINFO_KMGMT_NONE;
1162 if( strstr(spec, "TKIP") )
1163 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1165 if( strstr(spec, "CCMP") )
1166 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1168 if( strstr(spec, "WEP-40") )
1169 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1171 if( strstr(spec, "WEP-104") )
1172 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1174 c->group_ciphers = c->pair_ciphers;
1178 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1180 int freq, rssi, qmax, count;
1182 char ssid[128] = { 0 };
1183 char bssid[18] = { 0 };
1184 char cipher[256] = { 0 };
1186 /* Got a radioX pseudo interface, find some interface on it or create one */
1187 if( !strncmp(ifname, "radio", 5) )
1189 /* Reuse existing interface */
1190 if( (res = nl80211_phy2ifname(ifname)) != NULL )
1192 return nl80211_get_scanlist(res, buf, len);
1195 /* Need to spawn a temporary iface for scanning */
1196 else if( (res = nl80211_ifadd(ifname)) != NULL )
1198 count = nl80211_get_scanlist(res, buf, len);
1204 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1206 /* WPA supplicant */
1207 if( (res = nl80211_wpasupp_info(ifname, "SCAN")) && !strcmp(res, "OK\n") )
1211 if( (res = nl80211_wpasupp_info(ifname, "SCAN_RESULTS")) )
1213 nl80211_get_quality_max(ifname, &qmax);
1215 /* skip header line */
1216 while( *res++ != '\n' );
1220 while( sscanf(res, "%17s %d %d %255s %127[^\n]\n",
1221 bssid, &freq, &rssi, cipher, ssid) > 0 )
1224 e->mac[0] = strtol(&bssid[0], NULL, 16);
1225 e->mac[1] = strtol(&bssid[3], NULL, 16);
1226 e->mac[2] = strtol(&bssid[6], NULL, 16);
1227 e->mac[3] = strtol(&bssid[9], NULL, 16);
1228 e->mac[4] = strtol(&bssid[12], NULL, 16);
1229 e->mac[5] = strtol(&bssid[15], NULL, 16);
1232 memcpy(e->ssid, ssid,
1233 min(strlen(ssid), sizeof(e->ssid) - 1));
1235 /* Mode (assume master) */
1236 sprintf((char *)e->mode, "Master");
1239 e->channel = nl80211_freq2channel(freq);
1247 /* The cfg80211 wext compat layer assumes a signal range
1248 * of -110 dBm to -40 dBm, the quality value is derived
1249 * by adding 110 to the signal level */
1252 else if( rssi > -40 )
1255 e->quality = (rssi + 110);
1263 e->quality_max = qmax;
1266 nl80211_get_scancrypto(cipher, &e->crypto);
1268 /* advance to next line */
1269 while( *res && *res++ != '\n' );
1275 *len = count * sizeof(struct iwinfo_scanlist_entry);
1283 /* Got a temp interface, don't create yet another one */
1284 if( !strncmp(ifname, "tmp.", 4) )
1286 if( !iwinfo_ifup(ifname) )
1289 wext_get_scanlist(ifname, buf, len);
1290 iwinfo_ifdown(ifname);
1294 /* Spawn a new scan interface */
1297 if( !(res = nl80211_ifadd(ifname)) )
1300 if( !iwinfo_ifmac(res) )
1303 /* if we can take the new interface up, the driver supports an
1304 * additional interface and there's no need to tear down the ap */
1305 if( iwinfo_ifup(res) )
1307 wext_get_scanlist(res, buf, len);
1311 /* driver cannot create secondary interface, take down ap
1313 else if( iwinfo_ifdown(ifname) && iwinfo_ifup(res) )
1315 wext_get_scanlist(res, buf, len);
1317 iwinfo_ifup(ifname);
1318 nl80211_hostapd_hup(ifname);
1330 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1332 int count = 0, bands_remain, freqs_remain;
1333 struct nl80211_msg_conveyor *req, *res;
1334 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1335 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1336 struct nlattr *band, *freq;
1337 struct iwinfo_freqlist_entry *e = (struct iwinfo_freqlist_entry *)buf;
1339 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1342 res = nl80211_send(req);
1345 nla_for_each_nested(band,
1346 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1348 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1349 nla_len(band), NULL);
1351 nla_for_each_nested(freq,
1352 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1354 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1355 nla_data(freq), nla_len(freq), NULL);
1357 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1358 freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1361 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1362 e->channel = nl80211_freq2channel(e->mhz);
1365 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1366 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
1367 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1381 *len = count * sizeof(struct iwinfo_freqlist_entry);
1388 int nl80211_get_country(const char *ifname, char *buf)
1391 struct nl80211_msg_conveyor *req, *res;
1393 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1396 res = nl80211_send(req);
1399 if( res->attr[NL80211_ATTR_REG_ALPHA2] )
1401 memcpy(buf, nla_data(res->attr[NL80211_ATTR_REG_ALPHA2]), 2);
1412 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1415 struct iwinfo_iso3166_label *l;
1416 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1418 for( l = ISO3166_Names, count = 0; l->iso3166; l++, e++, count++ )
1420 e->iso3166 = l->iso3166;
1421 e->ccode[0] = (l->iso3166 / 256);
1422 e->ccode[1] = (l->iso3166 % 256);
1425 *len = (count * sizeof(struct iwinfo_country_entry));
1429 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1431 int bands_remain, freqs_remain;
1432 struct nl80211_msg_conveyor *req, *res;
1433 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1434 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1435 struct nlattr *band, *freq;
1438 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1441 res = nl80211_send(req);
1444 nla_for_each_nested(band,
1445 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1447 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1448 nla_len(band), NULL);
1450 if( bands[NL80211_BAND_ATTR_HT_CAPA] )
1451 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1453 /* Treat any nonzero capability as 11n */
1455 *buf |= IWINFO_80211_N;
1457 nla_for_each_nested(freq,
1458 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1460 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1461 nla_data(freq), nla_len(freq), NULL);
1463 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] )
1466 if( nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485 )
1468 *buf |= IWINFO_80211_B;
1469 *buf |= IWINFO_80211_G;
1473 *buf |= IWINFO_80211_A;
1482 return *buf ? 0 : -1;
1485 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1487 /* Test whether we can create another interface */
1488 char *nif = nl80211_ifadd(ifname);
1492 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));