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, "radio", 5) )
149 phyidx = atoi(&ifname[5]);
150 else if( !strncmp(ifname, "mon.", 4) )
151 ifidx = if_nametoindex(&ifname[4]);
153 ifidx = if_nametoindex(ifname);
155 if( (ifidx < 0) && (phyidx < 0) )
162 cb = nl_cb_alloc(NL_CB_DEFAULT);
166 genlmsg_put(req, 0, 0, genl_family_get_id(nls->nl80211), 0,
170 NLA_PUT_U32(req, NL80211_ATTR_IFINDEX, ifidx);
173 NLA_PUT_U32(req, NL80211_ATTR_WIPHY, phyidx);
194 static void nl80211_cb(struct nl80211_msg_conveyor *cv,
195 int (*cb)(struct nl_msg *, void *), void *arg)
198 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb, arg);
201 static struct nl80211_msg_conveyor * nl80211_send(struct nl80211_msg_conveyor *cv)
203 static struct nl80211_msg_conveyor rcv;
207 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
209 if( nl_send_auto_complete(nls->nl_sock, cv->msg) < 0 )
212 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
213 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
214 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
217 nl_recvmsgs(nls->nl_sock, cv->cb);
228 static int nl80211_freq2channel(int freq)
234 return (freq - 2407) / 5;
236 return (freq / 5) - 1000;
239 static char * nl80211_getval(const char *buf, const char *key)
242 char lkey[64] = { 0 };
243 const char *ln = buf;
244 static char lval[256] = { 0 };
246 for( i = 0, len = strlen(buf); i < len; i++ )
248 if( !lkey[0] && (buf[i] == ' ' || buf[i] == '\t') )
252 else if( !lkey[0] && (buf[i] == '=') )
254 if( (&buf[i] - ln) > 0 )
255 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
257 else if( buf[i] == '\n' )
259 if( lkey[0] && !strcmp(lkey, key) )
261 memcpy(lval, ln + strlen(lkey) + 1,
262 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
268 memset(lkey, 0, sizeof(lkey));
269 memset(lval, 0, sizeof(lval));
276 static char * nl80211_ifname2phy(const char *ifname)
278 static char phy[32] = { 0 };
279 struct nl80211_msg_conveyor *req, *res;
281 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
284 res = nl80211_send(req);
287 if( res->attr[NL80211_ATTR_WIPHY_NAME] )
289 snprintf(phy, sizeof(phy), "%s",
290 nla_get_string(res->attr[NL80211_ATTR_WIPHY_NAME]));
297 return phy[0] ? phy : NULL;
300 static char * nl80211_hostapd_info(const char *ifname)
303 char path[32] = { 0 };
304 static char buf[4096] = { 0 };
307 if( (phy = nl80211_ifname2phy(ifname)) != NULL )
309 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
311 if( (conf = fopen(path, "r")) != NULL )
313 fread(buf, sizeof(buf) - 1, 1, conf);
323 static char * nl80211_wpasupp_info(const char *ifname, const char *cmd)
327 size_t remote_length, local_length;
328 static char buffer[1024] = { 0 };
330 struct timeval tv = { 2, 0 };
331 struct sockaddr_un local = { 0 };
332 struct sockaddr_un remote = { 0 };
336 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
340 remote.sun_family = AF_UNIX;
341 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
342 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
344 if( fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0 )
347 if( connect(sock, (struct sockaddr *) &remote, remote_length) )
350 local.sun_family = AF_UNIX;
351 local_length = sizeof(local.sun_family) + sprintf(local.sun_path,
352 "/var/run/iwinfo-%s-%d", ifname, getpid());
354 if( bind(sock, (struct sockaddr *) &local, local_length) )
357 send(sock, cmd, strlen(cmd), 0);
364 if( select(sock + 1, &rfds, NULL, NULL, &tv) < 0 )
367 if( !FD_ISSET(sock, &rfds) )
370 if( (len = recv(sock, buffer, sizeof(buffer), 0)) <= 0 )
375 if( buffer[0] != '<' )
383 unlink(local.sun_path);
388 static char * nl80211_phy2ifname(const char *ifname)
392 static char nif[IFNAMSIZ] = { 0 };
397 if( !strncmp(ifname, "radio", 5) )
399 phyidx = atoi(&ifname[5]);
401 if( (d = opendir("/sys/class/net")) != NULL )
403 while( (e = readdir(d)) != NULL )
405 snprintf(buffer, sizeof(buffer),
406 "/sys/class/net/%s/phy80211/index", e->d_name);
408 if( (fd = open(buffer, O_RDONLY)) > 0 )
410 if( (read(fd, buffer, sizeof(buffer)) > 0) &&
411 (atoi(buffer) == phyidx) )
413 strncpy(nif, e->d_name, sizeof(nif));
427 return nif[0] ? nif : NULL;
430 static char * nl80211_add_tempif(const char *ifname)
434 static char nif[IFNAMSIZ] = { 0 };
435 struct nl80211_msg_conveyor *req, *res;
437 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
440 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
442 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
443 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
445 res = nl80211_send(req);
459 static void nl80211_del_tempif(const char *ifname)
461 struct nl80211_msg_conveyor *req, *res;
463 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
466 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
468 nl80211_free(nl80211_send(req));
476 int nl80211_probe(const char *ifname)
478 return !!nl80211_ifname2phy(ifname);
481 void nl80211_close(void)
486 nl_socket_free(nls->nl_sock);
489 nl_cache_free(nls->nl_cache);
496 int nl80211_get_mode(const char *ifname, char *buf)
498 return wext_get_mode(ifname, buf);
501 int nl80211_get_ssid(const char *ifname, char *buf)
505 if( !wext_get_ssid(ifname, buf) )
509 else if( (ssid = nl80211_hostapd_info(ifname)) &&
510 (ssid = nl80211_getval(ssid, "ssid")) )
512 memcpy(buf, ssid, strlen(ssid));
519 int nl80211_get_bssid(const char *ifname, char *buf)
522 unsigned char mac[6];
524 if( !wext_get_bssid(ifname, buf) )
528 else if( (bssid = nl80211_hostapd_info(ifname)) &&
529 (bssid = nl80211_getval(bssid, "bssid")) )
531 mac[0] = strtol(&bssid[0], NULL, 16);
532 mac[1] = strtol(&bssid[3], NULL, 16);
533 mac[2] = strtol(&bssid[6], NULL, 16);
534 mac[3] = strtol(&bssid[9], NULL, 16);
535 mac[4] = strtol(&bssid[12], NULL, 16);
536 mac[5] = strtol(&bssid[15], NULL, 16);
538 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
539 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
547 int nl80211_get_channel(const char *ifname, int *buf)
549 return wext_get_channel(ifname, buf);
552 int nl80211_get_frequency(const char *ifname, int *buf)
554 return wext_get_frequency(ifname, buf);
557 int nl80211_get_txpower(const char *ifname, int *buf)
559 return wext_get_txpower(ifname, buf);
563 static int nl80211_get_signal_cb(struct nl_msg *msg, void *arg)
567 struct nl80211_rssi_rate *rr = arg;
569 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
570 struct nlattr *attr[NL80211_ATTR_MAX + 1];
571 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
572 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
574 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
575 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
576 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
577 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
578 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
579 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
580 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
581 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
582 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
583 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
584 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
587 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
588 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
589 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
590 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
591 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
594 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
595 genlmsg_attrlen(gnlh, 0), NULL);
597 if( attr[NL80211_ATTR_STA_INFO] )
599 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
600 attr[NL80211_ATTR_STA_INFO], stats_policy) )
602 if( sinfo[NL80211_STA_INFO_SIGNAL] )
604 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
605 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
608 if( sinfo[NL80211_STA_INFO_TX_BITRATE] )
610 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
611 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
613 if( rinfo[NL80211_RATE_INFO_BITRATE] )
615 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
617 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
627 int nl80211_get_bitrate(const char *ifname, int *buf)
629 struct nl80211_rssi_rate rr;
630 struct nl80211_msg_conveyor *req;
632 if( !wext_get_bitrate(ifname, buf) )
635 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
641 nl80211_cb(req, nl80211_get_signal_cb, &rr);
647 *buf = (rr.rate * 100);
655 int nl80211_get_signal(const char *ifname, int *buf)
657 struct nl80211_rssi_rate rr;
658 struct nl80211_msg_conveyor *req;
660 if( !wext_get_signal(ifname, buf) )
663 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
669 nl80211_cb(req, nl80211_get_signal_cb, &rr);
683 int nl80211_get_noise(const char *ifname, int *buf)
686 struct nl80211_msg_conveyor *req, *res;
687 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
689 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
690 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
691 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
694 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
697 res = nl80211_send(req);
700 if( res->attr[NL80211_ATTR_SURVEY_INFO] )
702 if( !nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
703 res->attr[NL80211_ATTR_SURVEY_INFO], sp) &&
704 si[NL80211_SURVEY_INFO_NOISE] )
706 *buf = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
718 int nl80211_get_quality(const char *ifname, int *buf)
722 if( wext_get_quality(ifname, buf) )
726 if( !nl80211_get_signal(ifname, &signal) )
728 /* A positive signal level is usually just a quality
729 * value, pass through as-is */
735 /* The cfg80211 wext compat layer assumes a signal range
736 * of -110 dBm to -40 dBm, the quality value is derived
737 * by adding 110 to the signal level */
742 else if( signal > -40 )
745 *buf = (signal + 110);
753 int nl80211_get_quality_max(const char *ifname, int *buf)
755 if( wext_get_quality_max(ifname, buf) )
756 /* The cfg80211 wext compat layer assumes a maximum
763 int nl80211_get_encryption(const char *ifname, char *buf)
768 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
771 if( (res = nl80211_hostapd_info(ifname)) &&
772 nl80211_getval(res, "interface") )
774 if( (val = nl80211_getval(res, "auth_algs")) && (val > 0) )
776 c->auth_suites |= IWINFO_KMGMT_NONE;
780 c->auth_algs |= IWINFO_AUTH_OPEN;
784 c->auth_algs |= IWINFO_AUTH_SHARED;
788 c->auth_algs |= IWINFO_AUTH_OPEN;
789 c->auth_algs |= IWINFO_AUTH_SHARED;
796 for( i = 0; i < 4; i++ )
798 snprintf(k, sizeof(k), "wep_key%d", i);
800 if( (val = nl80211_getval(res, k)) )
802 if( (strlen(val) == 5) || (strlen(val) == 10) )
803 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
805 else if( (strlen(val) == 13) || (strlen(val) == 26) )
806 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
810 c->group_ciphers = c->pair_ciphers;
816 if( (val = nl80211_getval(res, "wpa")) != NULL )
817 c->wpa_version = atoi(val);
820 val = nl80211_getval(res, "wpa_key_mgmt");
822 if( !val || strstr(val, "PSK") )
823 c->auth_suites |= IWINFO_KMGMT_PSK;
825 if( val && strstr(val, "EAP") )
826 c->auth_suites |= IWINFO_KMGMT_8021x;
828 if( val && strstr(val, "NONE") )
829 c->auth_suites |= IWINFO_KMGMT_NONE;
832 if( (val = nl80211_getval(res, "wpa_pairwise")) != NULL )
834 if( strstr(val, "TKIP") )
835 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
837 if( strstr(val, "CCMP") )
838 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
840 if( strstr(val, "NONE") )
841 c->pair_ciphers |= IWINFO_CIPHER_NONE;
845 c->group_ciphers = c->pair_ciphers;
846 c->enabled = (c->auth_algs || c->auth_suites) ? 1 : 0;
852 else if( (res = nl80211_wpasupp_info(ifname, "STATUS")) &&
853 (val = nl80211_getval(res, "pairwise_cipher")) )
856 if( strstr(val, "WEP") )
858 if( strstr(val, "WEP-40") )
859 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
861 else if( strstr(val, "WEP-104") )
862 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
865 c->group_ciphers = c->pair_ciphers;
867 c->auth_suites |= IWINFO_KMGMT_NONE;
868 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
874 if( strstr(val, "TKIP") )
875 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
877 else if( strstr(val, "CCMP") )
878 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
880 else if( strstr(val, "NONE") )
881 c->pair_ciphers |= IWINFO_CIPHER_NONE;
883 else if( strstr(val, "WEP-40") )
884 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
886 else if( strstr(val, "WEP-104") )
887 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
890 if( (val = nl80211_getval(res, "group_cipher")) )
892 if( strstr(val, "TKIP") )
893 c->group_ciphers |= IWINFO_CIPHER_TKIP;
895 else if( strstr(val, "CCMP") )
896 c->group_ciphers |= IWINFO_CIPHER_CCMP;
898 else if( strstr(val, "NONE") )
899 c->group_ciphers |= IWINFO_CIPHER_NONE;
901 else if( strstr(val, "WEP-40") )
902 c->group_ciphers |= IWINFO_CIPHER_WEP40;
904 else if( strstr(val, "WEP-104") )
905 c->group_ciphers |= IWINFO_CIPHER_WEP104;
909 if( (val = nl80211_getval(res, "key_mgmt")) )
911 if( strstr(val, "WPA2") )
914 else if( strstr(val, "WPA") )
918 if( strstr(val, "PSK") )
919 c->auth_suites |= IWINFO_KMGMT_PSK;
921 else if( strstr(val, "EAP") || strstr(val, "802.1X") )
922 c->auth_suites |= IWINFO_KMGMT_8021x;
924 else if( strstr(val, "NONE") )
925 c->auth_suites |= IWINFO_KMGMT_NONE;
928 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
938 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
940 struct nl80211_assoc_count *ac = arg;
941 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
942 struct nlattr *attr[NL80211_ATTR_MAX + 1];
943 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
945 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
946 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
947 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
948 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
949 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
950 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
951 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
952 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
953 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
954 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
955 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
958 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
959 genlmsg_attrlen(gnlh, 0), NULL);
961 if( attr[NL80211_ATTR_MAC] )
962 memcpy(ac->entry->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
964 if( attr[NL80211_ATTR_STA_INFO] )
966 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
967 attr[NL80211_ATTR_STA_INFO], stats_policy) )
969 if( sinfo[NL80211_STA_INFO_SIGNAL] )
970 ac->entry->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
974 ac->entry->noise = ac->noise;
981 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
983 struct nl80211_assoc_count ac;
984 struct nl80211_msg_conveyor *req;
986 nl80211_get_noise(ifname, &ac.noise);
988 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
992 ac.entry = (struct iwinfo_assoclist_entry *)buf;
994 nl80211_cb(req, nl80211_get_assoclist_cb, &ac);
998 *len = (ac.count * sizeof(struct iwinfo_assoclist_entry));
1005 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1007 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1008 int dbm_max = -1, dbm_cur, dbm_cnt;
1009 struct nl80211_msg_conveyor *req, *res;
1010 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1011 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1012 struct nlattr *band, *freq;
1013 struct iwinfo_txpwrlist_entry entry;
1015 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1016 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1017 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1018 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1019 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1020 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1021 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1024 if( nl80211_get_channel(ifname, &ch_cur) )
1027 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1030 res = nl80211_send(req);
1033 nla_for_each_nested(band,
1034 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1036 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1037 nla_len(band), NULL);
1039 nla_for_each_nested(freq,
1040 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1042 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1043 nla_data(freq), nla_len(freq), freq_policy);
1045 ch_cmp = nl80211_freq2channel(
1046 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1048 if( (!ch_cur || (ch_cmp == ch_cur)) &&
1049 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1051 dbm_max = (int)(0.01 * nla_get_u32(
1052 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1066 for( dbm_cur = 0, dbm_cnt = 0;
1068 dbm_cur += 2, dbm_cnt++ )
1070 entry.dbm = dbm_cur;
1071 entry.mw = wext_dbm2mw(dbm_cur);
1073 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1076 entry.dbm = dbm_max;
1077 entry.mw = wext_dbm2mw(dbm_max);
1079 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1082 *len = dbm_cnt * sizeof(entry);
1089 static void nl80211_get_scancrypto(const char *spec,
1090 struct iwinfo_crypto_entry *c)
1092 if( strstr(spec, "OPEN") )
1100 if( strstr(spec, "WPA2-") && strstr(spec, "WPA-") )
1103 else if( strstr(spec, "WPA2") )
1106 else if( strstr(spec, "WPA") )
1109 else if( strstr(spec, "WEP") )
1110 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1113 if( strstr(spec, "PSK") )
1114 c->auth_suites |= IWINFO_KMGMT_PSK;
1116 if( strstr(spec, "802.1X") || strstr(spec, "EAP") )
1117 c->auth_suites |= IWINFO_KMGMT_8021x;
1119 if( strstr(spec, "WPA-NONE") )
1120 c->auth_suites |= IWINFO_KMGMT_NONE;
1123 if( strstr(spec, "TKIP") )
1124 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1126 if( strstr(spec, "CCMP") )
1127 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1129 if( strstr(spec, "WEP-40") )
1130 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1132 if( strstr(spec, "WEP-104") )
1133 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1135 c->group_ciphers = c->pair_ciphers;
1139 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1141 int freq, rssi, qmax, count;
1144 char ssid[128] = { 0 };
1145 char bssid[18] = { 0 };
1146 char cipher[256] = { 0 };
1148 /* Got a radioX pseudo interface, find some interface on it or create one */
1149 if( !strncmp(ifname, "radio", 5) )
1151 /* Reuse existing interface */
1152 if( (res = nl80211_phy2ifname(ifname)) != NULL )
1154 return nl80211_get_scanlist(res, buf, len);
1157 /* Need to spawn a temporary iface for scanning */
1158 else if( (res = nl80211_add_tempif(ifname)) != NULL )
1160 count = nl80211_get_scanlist(res, buf, len);
1161 nl80211_del_tempif(res);
1166 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1168 /* WPA supplicant */
1169 if( (res = nl80211_wpasupp_info(ifname, "SCAN")) &&
1170 !strcmp(res, "OK\n") )
1174 if( (res = nl80211_wpasupp_info(ifname, "SCAN_RESULTS")) )
1176 nl80211_get_quality_max(ifname, &qmax);
1178 /* skip header line */
1179 while( *res++ != '\n' );
1183 while( sscanf(res, "%17s %d %d %255s %127[^\n]\n",
1184 bssid, &freq, &rssi, cipher, ssid) > 0 )
1187 e->mac[0] = strtol(&bssid[0], NULL, 16);
1188 e->mac[1] = strtol(&bssid[3], NULL, 16);
1189 e->mac[2] = strtol(&bssid[6], NULL, 16);
1190 e->mac[3] = strtol(&bssid[9], NULL, 16);
1191 e->mac[4] = strtol(&bssid[12], NULL, 16);
1192 e->mac[5] = strtol(&bssid[15], NULL, 16);
1195 memcpy(e->ssid, ssid,
1196 min(strlen(ssid), sizeof(e->ssid) - 1));
1198 /* Mode (assume master) */
1199 sprintf((char *)e->mode, "Master");
1202 e->channel = nl80211_freq2channel(freq);
1210 /* The cfg80211 wext compat layer assumes a signal range
1211 * of -110 dBm to -40 dBm, the quality value is derived
1212 * by adding 110 to the signal level */
1215 else if( rssi > -40 )
1218 e->quality = (rssi + 110);
1226 e->quality_max = qmax;
1229 nl80211_get_scancrypto(cipher, &e->crypto);
1231 /* advance to next line */
1232 while( *res && *res++ != '\n' );
1238 *len = count * sizeof(struct iwinfo_scanlist_entry);
1246 if( (res = nl80211_ifname2phy(ifname)) != NULL )
1249 * This is a big ugly hack, just look away.
1252 sprintf(cmd, "ifconfig %s down 2>/dev/null", ifname);
1253 if( WEXITSTATUS(system(cmd)) )
1256 sprintf(cmd, "iw phy %s interface add scan.%s "
1257 "type station 2>/dev/null", res, ifname);
1258 if( WEXITSTATUS(system(cmd)) )
1261 sprintf(cmd, "ifconfig scan.%s up 2>/dev/null", ifname);
1262 if( WEXITSTATUS(system(cmd)) )
1265 sprintf(cmd, "scan.%s", ifname);
1266 wext_get_scanlist(cmd, buf, len);
1269 sprintf(cmd, "ifconfig scan.%s down 2>/dev/null", ifname);
1270 (void) WEXITSTATUS(system(cmd));
1272 sprintf(cmd, "iw dev scan.%s del 2>/dev/null", ifname);
1273 (void) WEXITSTATUS(system(cmd));
1275 sprintf(cmd, "ifconfig %s up 2>/dev/null", ifname);
1276 (void) WEXITSTATUS(system(cmd));
1278 sprintf(cmd, "killall -HUP hostapd 2>/dev/null");
1279 (void) WEXITSTATUS(system(cmd));
1288 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1291 int count = 0, bands_remain, freqs_remain;
1292 struct nl80211_msg_conveyor *req, *res;
1293 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1294 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1295 struct nlattr *band, *freq;
1296 struct iwinfo_freqlist_entry *e = (struct iwinfo_freqlist_entry *)buf;
1298 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1299 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1300 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1301 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1302 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1303 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1304 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1307 if( !wext_get_freqlist(ifname, buf, len) )
1310 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1313 res = nl80211_send(req);
1316 nla_for_each_nested(band,
1317 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1319 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1320 nla_len(band), NULL);
1322 nla_for_each_nested(freq,
1323 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1325 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1326 nla_data(freq), nla_len(freq), freq_policy);
1328 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1329 e->channel = nl80211_freq2channel(e->mhz);
1342 *len = count * sizeof(struct iwinfo_freqlist_entry);
1349 int nl80211_get_country(const char *ifname, char *buf)
1352 struct nl80211_msg_conveyor *req, *res;
1354 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1357 res = nl80211_send(req);
1360 if( res->attr[NL80211_ATTR_REG_ALPHA2] )
1362 memcpy(buf, nla_data(res->attr[NL80211_ATTR_REG_ALPHA2]), 2);
1373 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1376 struct iwinfo_iso3166_label *l;
1377 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1379 for( l = ISO3166_Names, count = 0; l->iso3166; l++, e++, count++ )
1381 e->iso3166 = l->iso3166;
1382 e->ccode[0] = (l->iso3166 / 256);
1383 e->ccode[1] = (l->iso3166 % 256);
1386 *len = (count * sizeof(struct iwinfo_country_entry));
1390 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1392 /* We assume that multi bssid is always possible */