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 inline int nl80211_readint(const char *path)
409 if( (fd = open(path, O_RDONLY)) > -1 )
411 if( read(fd, buffer, sizeof(buffer)) > 0 )
420 static char * nl80211_phy2ifname(const char *ifname)
422 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
424 static char nif[IFNAMSIZ] = { 0 };
429 if( !strncmp(ifname, "phy", 3) )
430 phyidx = atoi(&ifname[3]);
431 else if( !strncmp(ifname, "radio", 5) )
432 phyidx = atoi(&ifname[5]);
436 if( (d = opendir("/sys/class/net")) != NULL )
438 while( (e = readdir(d)) != NULL )
440 snprintf(buffer, sizeof(buffer),
441 "/sys/class/net/%s/phy80211/index", e->d_name);
443 if( nl80211_readint(buffer) == phyidx )
445 snprintf(buffer, sizeof(buffer),
446 "/sys/class/net/%s/ifindex", e->d_name);
448 if( (cifidx = nl80211_readint(buffer)) >= 0 &&
449 ((ifidx < 0) || (cifidx < ifidx)) )
452 strncpy(nif, e->d_name, sizeof(nif));
461 return nif[0] ? nif : NULL;
464 static char * nl80211_ifadd(const char *ifname)
468 static char nif[IFNAMSIZ] = { 0 };
469 struct nl80211_msg_conveyor *req, *res;
471 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
474 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
476 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
477 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
479 res = nl80211_send(req);
493 static void nl80211_ifdel(const char *ifname)
495 struct nl80211_msg_conveyor *req;
497 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
500 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
502 nl80211_free(nl80211_send(req));
509 static void nl80211_hostapd_hup(const char *ifname)
513 char *phy = nl80211_ifname2phy(ifname);
517 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
518 if( (fd = open(buf, O_RDONLY)) > 0 )
520 if( read(fd, buf, sizeof(buf)) > 0 )
532 int nl80211_probe(const char *ifname)
534 return !!nl80211_ifname2phy(ifname);
537 void nl80211_close(void)
542 nl_socket_free(nls->nl_sock);
545 nl_cache_free(nls->nl_cache);
552 int nl80211_get_mode(const char *ifname, char *buf)
554 return wext_get_mode(ifname, buf);
557 int nl80211_get_ssid(const char *ifname, char *buf)
561 if( !wext_get_ssid(ifname, buf) )
565 else if( (ssid = nl80211_hostapd_info(ifname)) &&
566 (ssid = nl80211_getval(ifname, ssid, "ssid")) )
568 memcpy(buf, ssid, strlen(ssid));
575 int nl80211_get_bssid(const char *ifname, char *buf)
578 unsigned char mac[6];
580 if( !wext_get_bssid(ifname, buf) )
584 else if( (bssid = nl80211_hostapd_info(ifname)) &&
585 (bssid = nl80211_getval(ifname, bssid, "bssid")) )
587 mac[0] = strtol(&bssid[0], NULL, 16);
588 mac[1] = strtol(&bssid[3], NULL, 16);
589 mac[2] = strtol(&bssid[6], NULL, 16);
590 mac[3] = strtol(&bssid[9], NULL, 16);
591 mac[4] = strtol(&bssid[12], NULL, 16);
592 mac[5] = strtol(&bssid[15], NULL, 16);
594 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
595 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
603 int nl80211_get_channel(const char *ifname, int *buf)
607 if( wext_get_channel(ifname, buf) &&
608 NULL != (first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) )
610 return wext_get_channel(first, buf);
616 int nl80211_get_frequency(const char *ifname, int *buf)
620 if( wext_get_channel(ifname, buf) &&
621 NULL != (first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) )
623 return wext_get_frequency(first, buf);
629 int nl80211_get_txpower(const char *ifname, int *buf)
631 return wext_get_txpower(ifname, buf);
635 static int nl80211_get_signal_cb(struct nl_msg *msg, void *arg)
639 struct nl80211_rssi_rate *rr = arg;
641 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
642 struct nlattr *attr[NL80211_ATTR_MAX + 1];
643 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
644 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
646 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
647 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
648 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
649 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
650 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
651 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
652 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
653 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
654 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
655 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
656 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
659 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
660 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
661 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
662 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
663 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
666 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
667 genlmsg_attrlen(gnlh, 0), NULL);
669 if( attr[NL80211_ATTR_STA_INFO] )
671 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
672 attr[NL80211_ATTR_STA_INFO], stats_policy) )
674 if( sinfo[NL80211_STA_INFO_SIGNAL] )
676 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
677 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
680 if( sinfo[NL80211_STA_INFO_TX_BITRATE] )
682 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
683 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
685 if( rinfo[NL80211_RATE_INFO_BITRATE] )
687 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
689 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
699 int nl80211_get_bitrate(const char *ifname, int *buf)
701 struct nl80211_rssi_rate rr;
702 struct nl80211_msg_conveyor *req;
704 if( !wext_get_bitrate(ifname, buf) )
707 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
713 nl80211_cb(req, nl80211_get_signal_cb, &rr);
719 *buf = (rr.rate * 100);
727 int nl80211_get_signal(const char *ifname, int *buf)
729 struct nl80211_rssi_rate rr;
730 struct nl80211_msg_conveyor *req;
732 if( !wext_get_signal(ifname, buf) )
735 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
741 nl80211_cb(req, nl80211_get_signal_cb, &rr);
755 int nl80211_get_noise(const char *ifname, int *buf)
758 struct nl80211_msg_conveyor *req, *res;
759 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
761 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
762 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
763 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
766 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
769 res = nl80211_send(req);
772 if( res->attr[NL80211_ATTR_SURVEY_INFO] )
774 if( !nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
775 res->attr[NL80211_ATTR_SURVEY_INFO], sp) &&
776 si[NL80211_SURVEY_INFO_NOISE] )
778 *buf = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
790 int nl80211_get_quality(const char *ifname, int *buf)
794 if( wext_get_quality(ifname, buf) )
798 if( !nl80211_get_signal(ifname, &signal) )
800 /* A positive signal level is usually just a quality
801 * value, pass through as-is */
807 /* The cfg80211 wext compat layer assumes a signal range
808 * of -110 dBm to -40 dBm, the quality value is derived
809 * by adding 110 to the signal level */
814 else if( signal > -40 )
817 *buf = (signal + 110);
825 int nl80211_get_quality_max(const char *ifname, int *buf)
827 if( wext_get_quality_max(ifname, buf) )
828 /* The cfg80211 wext compat layer assumes a maximum
835 int nl80211_get_encryption(const char *ifname, char *buf)
840 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
843 if( (res = nl80211_hostapd_info(ifname)) )
845 if( (val = nl80211_getval(ifname, res, "auth_algs")) && (val > 0) )
847 c->auth_suites |= IWINFO_KMGMT_NONE;
851 c->auth_algs |= IWINFO_AUTH_OPEN;
855 c->auth_algs |= IWINFO_AUTH_SHARED;
859 c->auth_algs |= IWINFO_AUTH_OPEN;
860 c->auth_algs |= IWINFO_AUTH_SHARED;
867 for( i = 0; i < 4; i++ )
869 snprintf(k, sizeof(k), "wep_key%d", i);
871 if( (val = nl80211_getval(ifname, res, k)) )
873 if( (strlen(val) == 5) || (strlen(val) == 10) )
874 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
876 else if( (strlen(val) == 13) || (strlen(val) == 26) )
877 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
881 c->group_ciphers = c->pair_ciphers;
887 if( (val = nl80211_getval(ifname, res, "wpa")) != NULL )
888 c->wpa_version = atoi(val);
891 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
893 if( !val || strstr(val, "PSK") )
894 c->auth_suites |= IWINFO_KMGMT_PSK;
896 if( val && strstr(val, "EAP") )
897 c->auth_suites |= IWINFO_KMGMT_8021x;
899 if( val && strstr(val, "NONE") )
900 c->auth_suites |= IWINFO_KMGMT_NONE;
903 if( (val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL )
905 if( strstr(val, "TKIP") )
906 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
908 if( strstr(val, "CCMP") )
909 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
911 if( strstr(val, "NONE") )
912 c->pair_ciphers |= IWINFO_CIPHER_NONE;
916 c->group_ciphers = c->pair_ciphers;
917 c->enabled = (c->auth_algs || c->auth_suites) ? 1 : 0;
923 else if( (res = nl80211_wpasupp_info(ifname, "STATUS")) &&
924 (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
927 if( strstr(val, "WEP") )
929 if( strstr(val, "WEP-40") )
930 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
932 else if( strstr(val, "WEP-104") )
933 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
936 c->group_ciphers = c->pair_ciphers;
938 c->auth_suites |= IWINFO_KMGMT_NONE;
939 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
945 if( strstr(val, "TKIP") )
946 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
948 else if( strstr(val, "CCMP") )
949 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
951 else if( strstr(val, "NONE") )
952 c->pair_ciphers |= IWINFO_CIPHER_NONE;
954 else if( strstr(val, "WEP-40") )
955 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
957 else if( strstr(val, "WEP-104") )
958 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
961 if( (val = nl80211_getval(NULL, res, "group_cipher")) )
963 if( strstr(val, "TKIP") )
964 c->group_ciphers |= IWINFO_CIPHER_TKIP;
966 else if( strstr(val, "CCMP") )
967 c->group_ciphers |= IWINFO_CIPHER_CCMP;
969 else if( strstr(val, "NONE") )
970 c->group_ciphers |= IWINFO_CIPHER_NONE;
972 else if( strstr(val, "WEP-40") )
973 c->group_ciphers |= IWINFO_CIPHER_WEP40;
975 else if( strstr(val, "WEP-104") )
976 c->group_ciphers |= IWINFO_CIPHER_WEP104;
980 if( (val = nl80211_getval(NULL, res, "key_mgmt")) )
982 if( strstr(val, "WPA2") )
985 else if( strstr(val, "WPA") )
989 if( strstr(val, "PSK") )
990 c->auth_suites |= IWINFO_KMGMT_PSK;
992 else if( strstr(val, "EAP") || strstr(val, "802.1X") )
993 c->auth_suites |= IWINFO_KMGMT_8021x;
995 else if( strstr(val, "NONE") )
996 c->auth_suites |= IWINFO_KMGMT_NONE;
999 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1009 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1011 struct nl80211_assoc_count *ac = arg;
1012 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1013 struct nlattr *attr[NL80211_ATTR_MAX + 1];
1014 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1016 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1017 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1018 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1019 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1020 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1021 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1022 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1023 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1024 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1025 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1026 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1029 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1030 genlmsg_attrlen(gnlh, 0), NULL);
1032 if( attr[NL80211_ATTR_MAC] )
1033 memcpy(ac->entry->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1035 if( attr[NL80211_ATTR_STA_INFO] )
1037 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1038 attr[NL80211_ATTR_STA_INFO], stats_policy) )
1040 if( sinfo[NL80211_STA_INFO_SIGNAL] )
1041 ac->entry->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1045 ac->entry->noise = ac->noise;
1052 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1054 struct nl80211_assoc_count ac;
1055 struct nl80211_msg_conveyor *req;
1057 nl80211_get_noise(ifname, &ac.noise);
1059 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
1063 ac.entry = (struct iwinfo_assoclist_entry *)buf;
1065 nl80211_cb(req, nl80211_get_assoclist_cb, &ac);
1069 *len = (ac.count * sizeof(struct iwinfo_assoclist_entry));
1076 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1078 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1079 int dbm_max = -1, dbm_cur, dbm_cnt;
1080 struct nl80211_msg_conveyor *req, *res;
1081 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1082 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1083 struct nlattr *band, *freq;
1084 struct iwinfo_txpwrlist_entry entry;
1086 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1087 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1088 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1089 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1090 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1091 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1092 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1095 if( nl80211_get_channel(ifname, &ch_cur) )
1098 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1101 res = nl80211_send(req);
1104 nla_for_each_nested(band,
1105 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1107 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1108 nla_len(band), NULL);
1110 nla_for_each_nested(freq,
1111 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1113 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1114 nla_data(freq), nla_len(freq), freq_policy);
1116 ch_cmp = nl80211_freq2channel(
1117 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1119 if( (!ch_cur || (ch_cmp == ch_cur)) &&
1120 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1122 dbm_max = (int)(0.01 * nla_get_u32(
1123 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1137 for( dbm_cur = 0, dbm_cnt = 0;
1139 dbm_cur += 2, dbm_cnt++ )
1141 entry.dbm = dbm_cur;
1142 entry.mw = iwinfo_dbm2mw(dbm_cur);
1144 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1147 entry.dbm = dbm_max;
1148 entry.mw = iwinfo_dbm2mw(dbm_max);
1150 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1153 *len = dbm_cnt * sizeof(entry);
1160 static void nl80211_get_scancrypto(const char *spec,
1161 struct iwinfo_crypto_entry *c)
1163 if( strstr(spec, "OPEN") )
1171 if( strstr(spec, "WPA2-") && strstr(spec, "WPA-") )
1174 else if( strstr(spec, "WPA2") )
1177 else if( strstr(spec, "WPA") )
1180 else if( strstr(spec, "WEP") )
1181 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1184 if( strstr(spec, "PSK") )
1185 c->auth_suites |= IWINFO_KMGMT_PSK;
1187 if( strstr(spec, "802.1X") || strstr(spec, "EAP") )
1188 c->auth_suites |= IWINFO_KMGMT_8021x;
1190 if( strstr(spec, "WPA-NONE") )
1191 c->auth_suites |= IWINFO_KMGMT_NONE;
1194 if( strstr(spec, "TKIP") )
1195 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1197 if( strstr(spec, "CCMP") )
1198 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1200 if( strstr(spec, "WEP-40") )
1201 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1203 if( strstr(spec, "WEP-104") )
1204 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1206 c->group_ciphers = c->pair_ciphers;
1210 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1212 int freq, rssi, qmax, count;
1214 char ssid[128] = { 0 };
1215 char bssid[18] = { 0 };
1216 char cipher[256] = { 0 };
1218 /* Got a radioX pseudo interface, find some interface on it or create one */
1219 if( !strncmp(ifname, "radio", 5) )
1221 /* Reuse existing interface */
1222 if( (res = nl80211_phy2ifname(ifname)) != NULL )
1224 return nl80211_get_scanlist(res, buf, len);
1227 /* Need to spawn a temporary iface for scanning */
1228 else if( (res = nl80211_ifadd(ifname)) != NULL )
1230 count = nl80211_get_scanlist(res, buf, len);
1236 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1238 /* WPA supplicant */
1239 if( (res = nl80211_wpasupp_info(ifname, "SCAN")) && !strcmp(res, "OK\n") )
1243 if( (res = nl80211_wpasupp_info(ifname, "SCAN_RESULTS")) )
1245 nl80211_get_quality_max(ifname, &qmax);
1247 /* skip header line */
1248 while( *res++ != '\n' );
1252 while( sscanf(res, "%17s %d %d %255s %127[^\n]\n",
1253 bssid, &freq, &rssi, cipher, ssid) > 0 )
1256 e->mac[0] = strtol(&bssid[0], NULL, 16);
1257 e->mac[1] = strtol(&bssid[3], NULL, 16);
1258 e->mac[2] = strtol(&bssid[6], NULL, 16);
1259 e->mac[3] = strtol(&bssid[9], NULL, 16);
1260 e->mac[4] = strtol(&bssid[12], NULL, 16);
1261 e->mac[5] = strtol(&bssid[15], NULL, 16);
1264 memcpy(e->ssid, ssid,
1265 min(strlen(ssid), sizeof(e->ssid) - 1));
1267 /* Mode (assume master) */
1268 sprintf((char *)e->mode, "Master");
1271 e->channel = nl80211_freq2channel(freq);
1279 /* The cfg80211 wext compat layer assumes a signal range
1280 * of -110 dBm to -40 dBm, the quality value is derived
1281 * by adding 110 to the signal level */
1284 else if( rssi > -40 )
1287 e->quality = (rssi + 110);
1295 e->quality_max = qmax;
1298 nl80211_get_scancrypto(cipher, &e->crypto);
1300 /* advance to next line */
1301 while( *res && *res++ != '\n' );
1307 *len = count * sizeof(struct iwinfo_scanlist_entry);
1315 /* Got a temp interface, don't create yet another one */
1316 if( !strncmp(ifname, "tmp.", 4) )
1318 if( !iwinfo_ifup(ifname) )
1321 wext_get_scanlist(ifname, buf, len);
1322 iwinfo_ifdown(ifname);
1326 /* Spawn a new scan interface */
1329 if( !(res = nl80211_ifadd(ifname)) )
1332 if( !iwinfo_ifmac(res) )
1335 /* if we can take the new interface up, the driver supports an
1336 * additional interface and there's no need to tear down the ap */
1337 if( iwinfo_ifup(res) )
1339 wext_get_scanlist(res, buf, len);
1343 /* driver cannot create secondary interface, take down ap
1345 else if( iwinfo_ifdown(ifname) && iwinfo_ifup(res) )
1347 wext_get_scanlist(res, buf, len);
1349 iwinfo_ifup(ifname);
1350 nl80211_hostapd_hup(ifname);
1362 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1364 int count = 0, bands_remain, freqs_remain;
1365 struct nl80211_msg_conveyor *req, *res;
1366 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1367 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1368 struct nlattr *band, *freq;
1369 struct iwinfo_freqlist_entry *e = (struct iwinfo_freqlist_entry *)buf;
1371 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1374 res = nl80211_send(req);
1377 nla_for_each_nested(band,
1378 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1380 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1381 nla_len(band), NULL);
1383 nla_for_each_nested(freq,
1384 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1386 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1387 nla_data(freq), nla_len(freq), NULL);
1389 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1390 freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1393 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1394 e->channel = nl80211_freq2channel(e->mhz);
1397 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1398 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
1399 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1413 *len = count * sizeof(struct iwinfo_freqlist_entry);
1420 int nl80211_get_country(const char *ifname, char *buf)
1423 struct nl80211_msg_conveyor *req, *res;
1425 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1428 res = nl80211_send(req);
1431 if( res->attr[NL80211_ATTR_REG_ALPHA2] )
1433 memcpy(buf, nla_data(res->attr[NL80211_ATTR_REG_ALPHA2]), 2);
1444 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1447 struct iwinfo_iso3166_label *l;
1448 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1450 for( l = ISO3166_Names, count = 0; l->iso3166; l++, e++, count++ )
1452 e->iso3166 = l->iso3166;
1453 e->ccode[0] = (l->iso3166 / 256);
1454 e->ccode[1] = (l->iso3166 % 256);
1457 *len = (count * sizeof(struct iwinfo_country_entry));
1461 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1463 int bands_remain, freqs_remain;
1464 struct nl80211_msg_conveyor *req, *res;
1465 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1466 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1467 struct nlattr *band, *freq;
1470 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1473 res = nl80211_send(req);
1476 nla_for_each_nested(band,
1477 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1479 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1480 nla_len(band), NULL);
1482 if( bands[NL80211_BAND_ATTR_HT_CAPA] )
1483 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1485 /* Treat any nonzero capability as 11n */
1487 *buf |= IWINFO_80211_N;
1489 nla_for_each_nested(freq,
1490 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1492 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1493 nla_data(freq), nla_len(freq), NULL);
1495 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] )
1498 if( nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485 )
1500 *buf |= IWINFO_80211_B;
1501 *buf |= IWINFO_80211_G;
1505 *buf |= IWINFO_80211_A;
1514 return *buf ? 0 : -1;
1517 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1519 /* Test whether we can create another interface */
1520 char *nif = nl80211_ifadd(ifname);
1524 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));