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 inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
339 struct timeval tv = { 2, 0 };
344 memset(buf, 0, blen);
347 if( select(sock + 1, &rfds, NULL, NULL, &tv) < 0 )
350 if( !FD_ISSET(sock, &rfds) )
353 return recv(sock, buf, blen, 0);
356 static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
361 size_t remote_length, local_length;
362 static char buffer[10240] = { 0 };
364 struct sockaddr_un local = { 0 };
365 struct sockaddr_un remote = { 0 };
368 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
372 remote.sun_family = AF_UNIX;
373 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
374 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
376 if( fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0 )
379 if( connect(sock, (struct sockaddr *) &remote, remote_length) )
382 local.sun_family = AF_UNIX;
383 local_length = sizeof(local.sun_family) + sprintf(local.sun_path,
384 "/var/run/iwinfo-%s-%d", ifname, getpid());
386 if( bind(sock, (struct sockaddr *) &local, local_length) )
390 send(sock, "ATTACH", 6, 0);
392 if( nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0 )
396 send(sock, cmd, strlen(cmd), 0);
400 if( nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0 )
408 if( (!event && buffer[0] != '<') || strstr(buffer, event) )
417 if( local.sun_family )
418 unlink(local.sun_path);
423 static inline int nl80211_readint(const char *path)
429 if( (fd = open(path, O_RDONLY)) > -1 )
431 if( read(fd, buffer, sizeof(buffer)) > 0 )
440 static char * nl80211_phy2ifname(const char *ifname)
442 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
444 static char nif[IFNAMSIZ] = { 0 };
451 else if( !strncmp(ifname, "phy", 3) )
452 phyidx = atoi(&ifname[3]);
453 else if( !strncmp(ifname, "radio", 5) )
454 phyidx = atoi(&ifname[5]);
458 if( (d = opendir("/sys/class/net")) != NULL )
460 while( (e = readdir(d)) != NULL )
462 snprintf(buffer, sizeof(buffer),
463 "/sys/class/net/%s/phy80211/index", e->d_name);
465 if( nl80211_readint(buffer) == phyidx )
467 snprintf(buffer, sizeof(buffer),
468 "/sys/class/net/%s/ifindex", e->d_name);
470 if( (cifidx = nl80211_readint(buffer)) >= 0 &&
471 ((ifidx < 0) || (cifidx < ifidx)) )
474 strncpy(nif, e->d_name, sizeof(nif));
483 return nif[0] ? nif : NULL;
486 static char * nl80211_ifadd(const char *ifname)
490 static char nif[IFNAMSIZ] = { 0 };
491 struct nl80211_msg_conveyor *req, *res;
493 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
496 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
498 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
499 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
501 res = nl80211_send(req);
515 static void nl80211_ifdel(const char *ifname)
517 struct nl80211_msg_conveyor *req;
519 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
522 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
524 nl80211_free(nl80211_send(req));
531 static void nl80211_hostapd_hup(const char *ifname)
535 char *phy = nl80211_ifname2phy(ifname);
539 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
540 if( (fd = open(buf, O_RDONLY)) > 0 )
542 if( read(fd, buf, sizeof(buf)) > 0 )
554 int nl80211_probe(const char *ifname)
556 return !!nl80211_ifname2phy(ifname);
559 void nl80211_close(void)
564 nl_socket_free(nls->nl_sock);
567 nl_cache_free(nls->nl_cache);
574 int nl80211_get_mode(const char *ifname, char *buf)
576 return wext_get_mode(ifname, buf);
579 int nl80211_get_ssid(const char *ifname, char *buf)
583 if( !wext_get_ssid(ifname, buf) )
587 else if( (ssid = nl80211_hostapd_info(ifname)) &&
588 (ssid = nl80211_getval(ifname, ssid, "ssid")) )
590 memcpy(buf, ssid, strlen(ssid));
597 int nl80211_get_bssid(const char *ifname, char *buf)
600 unsigned char mac[6];
602 if( !wext_get_bssid(ifname, buf) )
606 else if( (bssid = nl80211_hostapd_info(ifname)) &&
607 (bssid = nl80211_getval(ifname, bssid, "bssid")) )
609 mac[0] = strtol(&bssid[0], NULL, 16);
610 mac[1] = strtol(&bssid[3], NULL, 16);
611 mac[2] = strtol(&bssid[6], NULL, 16);
612 mac[3] = strtol(&bssid[9], NULL, 16);
613 mac[4] = strtol(&bssid[12], NULL, 16);
614 mac[5] = strtol(&bssid[15], NULL, 16);
616 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
617 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
625 int nl80211_get_channel(const char *ifname, int *buf)
629 if( !wext_get_channel(ifname, buf) )
632 else if( (first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL )
633 return wext_get_channel(first, buf);
638 int nl80211_get_frequency(const char *ifname, int *buf)
642 if( !wext_get_frequency(ifname, buf) )
645 else if( (first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL )
646 return wext_get_frequency(first, buf);
651 int nl80211_get_txpower(const char *ifname, int *buf)
653 return wext_get_txpower(ifname, buf);
657 static int nl80211_get_signal_cb(struct nl_msg *msg, void *arg)
661 struct nl80211_rssi_rate *rr = arg;
663 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
664 struct nlattr *attr[NL80211_ATTR_MAX + 1];
665 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
666 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
668 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
669 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
670 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
671 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
672 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
673 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
674 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
675 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
676 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
677 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
678 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
681 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
682 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
683 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
684 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
685 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
688 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
689 genlmsg_attrlen(gnlh, 0), NULL);
691 if( attr[NL80211_ATTR_STA_INFO] )
693 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
694 attr[NL80211_ATTR_STA_INFO], stats_policy) )
696 if( sinfo[NL80211_STA_INFO_SIGNAL] )
698 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
699 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
702 if( sinfo[NL80211_STA_INFO_TX_BITRATE] )
704 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
705 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
707 if( rinfo[NL80211_RATE_INFO_BITRATE] )
709 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
711 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
721 int nl80211_get_bitrate(const char *ifname, int *buf)
723 struct nl80211_rssi_rate rr;
724 struct nl80211_msg_conveyor *req;
726 if( !wext_get_bitrate(ifname, buf) )
729 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
735 nl80211_cb(req, nl80211_get_signal_cb, &rr);
741 *buf = (rr.rate * 100);
749 int nl80211_get_signal(const char *ifname, int *buf)
751 struct nl80211_rssi_rate rr;
752 struct nl80211_msg_conveyor *req;
754 if( !wext_get_signal(ifname, buf) )
757 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
763 nl80211_cb(req, nl80211_get_signal_cb, &rr);
777 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
780 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
781 struct nlattr *tb[NL80211_ATTR_MAX + 1];
782 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
784 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
785 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
786 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
789 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
790 genlmsg_attrlen(gnlh, 0), NULL);
792 if (!tb[NL80211_ATTR_SURVEY_INFO])
795 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
796 tb[NL80211_ATTR_SURVEY_INFO], sp))
799 if (!si[NL80211_SURVEY_INFO_NOISE])
802 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
803 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
809 int nl80211_get_noise(const char *ifname, int *buf)
812 struct nl80211_msg_conveyor *req;
814 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
819 nl80211_cb(req, nl80211_get_noise_cb, &noise);
833 int nl80211_get_quality(const char *ifname, int *buf)
837 if( wext_get_quality(ifname, buf) )
841 if( !nl80211_get_signal(ifname, &signal) )
843 /* A positive signal level is usually just a quality
844 * value, pass through as-is */
850 /* The cfg80211 wext compat layer assumes a signal range
851 * of -110 dBm to -40 dBm, the quality value is derived
852 * by adding 110 to the signal level */
857 else if( signal > -40 )
860 *buf = (signal + 110);
868 int nl80211_get_quality_max(const char *ifname, int *buf)
870 if( wext_get_quality_max(ifname, buf) )
871 /* The cfg80211 wext compat layer assumes a maximum
878 int nl80211_get_encryption(const char *ifname, char *buf)
883 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
886 if( (res = nl80211_hostapd_info(ifname)) )
888 if( (val = nl80211_getval(ifname, res, "wpa")) != NULL )
889 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;
902 if( (val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL )
904 if( strstr(val, "TKIP") )
905 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
907 if( strstr(val, "CCMP") )
908 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
910 if( strstr(val, "NONE") )
911 c->pair_ciphers |= IWINFO_CIPHER_NONE;
914 if( (val = nl80211_getval(ifname, res, "auth_algs")) != NULL )
918 c->auth_algs |= IWINFO_AUTH_OPEN;
922 c->auth_algs |= IWINFO_AUTH_SHARED;
926 c->auth_algs |= IWINFO_AUTH_OPEN;
927 c->auth_algs |= IWINFO_AUTH_SHARED;
934 for( i = 0; i < 4; i++ )
936 snprintf(k, sizeof(k), "wep_key%d", i);
938 if( (val = nl80211_getval(ifname, res, k)) )
940 if( (strlen(val) == 5) || (strlen(val) == 10) )
941 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
943 else if( (strlen(val) == 13) || (strlen(val) == 26) )
944 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
949 c->group_ciphers = c->pair_ciphers;
950 c->enabled = (c->auth_algs || c->auth_suites) ? 1 : 0;
956 else if( (res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
957 (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
960 if( strstr(val, "WEP") )
962 if( strstr(val, "WEP-40") )
963 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
965 else if( strstr(val, "WEP-104") )
966 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
969 c->group_ciphers = c->pair_ciphers;
971 c->auth_suites |= IWINFO_KMGMT_NONE;
972 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
978 if( strstr(val, "TKIP") )
979 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
981 else if( strstr(val, "CCMP") )
982 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
984 else if( strstr(val, "NONE") )
985 c->pair_ciphers |= IWINFO_CIPHER_NONE;
987 else if( strstr(val, "WEP-40") )
988 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
990 else if( strstr(val, "WEP-104") )
991 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
994 if( (val = nl80211_getval(NULL, res, "group_cipher")) )
996 if( strstr(val, "TKIP") )
997 c->group_ciphers |= IWINFO_CIPHER_TKIP;
999 else if( strstr(val, "CCMP") )
1000 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1002 else if( strstr(val, "NONE") )
1003 c->group_ciphers |= IWINFO_CIPHER_NONE;
1005 else if( strstr(val, "WEP-40") )
1006 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1008 else if( strstr(val, "WEP-104") )
1009 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1013 if( (val = nl80211_getval(NULL, res, "key_mgmt")) )
1015 if( strstr(val, "WPA2") )
1018 else if( strstr(val, "WPA") )
1022 if( strstr(val, "PSK") )
1023 c->auth_suites |= IWINFO_KMGMT_PSK;
1025 else if( strstr(val, "EAP") || strstr(val, "802.1X") )
1026 c->auth_suites |= IWINFO_KMGMT_8021x;
1028 else if( strstr(val, "NONE") )
1029 c->auth_suites |= IWINFO_KMGMT_NONE;
1032 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1042 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1044 struct nl80211_assoc_count *ac = arg;
1045 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1046 struct nlattr *attr[NL80211_ATTR_MAX + 1];
1047 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1049 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1050 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1051 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1052 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1053 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1054 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1055 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1056 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1057 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1058 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1059 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1062 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1063 genlmsg_attrlen(gnlh, 0), NULL);
1065 if( attr[NL80211_ATTR_MAC] )
1066 memcpy(ac->entry->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1068 if( attr[NL80211_ATTR_STA_INFO] )
1070 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1071 attr[NL80211_ATTR_STA_INFO], stats_policy) )
1073 if( sinfo[NL80211_STA_INFO_SIGNAL] )
1074 ac->entry->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1078 ac->entry->noise = ac->noise;
1085 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1087 struct nl80211_assoc_count ac;
1088 struct nl80211_msg_conveyor *req;
1090 nl80211_get_noise(ifname, &ac.noise);
1092 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
1096 ac.entry = (struct iwinfo_assoclist_entry *)buf;
1098 nl80211_cb(req, nl80211_get_assoclist_cb, &ac);
1102 *len = (ac.count * sizeof(struct iwinfo_assoclist_entry));
1109 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1111 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1112 int dbm_max = -1, dbm_cur, dbm_cnt;
1113 struct nl80211_msg_conveyor *req, *res;
1114 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1115 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1116 struct nlattr *band, *freq;
1117 struct iwinfo_txpwrlist_entry entry;
1119 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1120 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1121 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1122 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1123 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1124 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1125 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1128 if( nl80211_get_channel(ifname, &ch_cur) )
1131 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1134 res = nl80211_send(req);
1137 nla_for_each_nested(band,
1138 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1140 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1141 nla_len(band), NULL);
1143 nla_for_each_nested(freq,
1144 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1146 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1147 nla_data(freq), nla_len(freq), freq_policy);
1149 ch_cmp = nl80211_freq2channel(
1150 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1152 if( (!ch_cur || (ch_cmp == ch_cur)) &&
1153 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1155 dbm_max = (int)(0.01 * nla_get_u32(
1156 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1170 for( dbm_cur = 0, dbm_cnt = 0;
1172 dbm_cur += 2, dbm_cnt++ )
1174 entry.dbm = dbm_cur;
1175 entry.mw = iwinfo_dbm2mw(dbm_cur);
1177 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1180 entry.dbm = dbm_max;
1181 entry.mw = iwinfo_dbm2mw(dbm_max);
1183 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1186 *len = dbm_cnt * sizeof(entry);
1193 static void nl80211_get_scancrypto(const char *spec,
1194 struct iwinfo_crypto_entry *c)
1196 if( strstr(spec, "WPA") || strstr(spec, "WEP") )
1200 if( strstr(spec, "WPA2-") && strstr(spec, "WPA-") )
1203 else if( strstr(spec, "WPA2") )
1206 else if( strstr(spec, "WPA") )
1209 else if( strstr(spec, "WEP") )
1210 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1213 if( strstr(spec, "PSK") )
1214 c->auth_suites |= IWINFO_KMGMT_PSK;
1216 if( strstr(spec, "802.1X") || strstr(spec, "EAP") )
1217 c->auth_suites |= IWINFO_KMGMT_8021x;
1219 if( strstr(spec, "WPA-NONE") )
1220 c->auth_suites |= IWINFO_KMGMT_NONE;
1223 if( strstr(spec, "TKIP") )
1224 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1226 if( strstr(spec, "CCMP") )
1227 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1229 if( strstr(spec, "WEP-40") )
1230 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1232 if( strstr(spec, "WEP-104") )
1233 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1235 c->group_ciphers = c->pair_ciphers;
1243 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1245 int freq, rssi, qmax, count;
1247 char ssid[128] = { 0 };
1248 char bssid[18] = { 0 };
1249 char cipher[256] = { 0 };
1251 /* Got a radioX pseudo interface, find some interface on it or create one */
1252 if( !strncmp(ifname, "radio", 5) )
1254 /* Reuse existing interface */
1255 if( (res = nl80211_phy2ifname(ifname)) != NULL )
1257 return nl80211_get_scanlist(res, buf, len);
1260 /* Need to spawn a temporary iface for scanning */
1261 else if( (res = nl80211_ifadd(ifname)) != NULL )
1263 count = nl80211_get_scanlist(res, buf, len);
1269 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1271 /* WPA supplicant */
1272 if( (res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")) )
1274 if( (res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)) )
1276 nl80211_get_quality_max(ifname, &qmax);
1278 /* skip header line */
1279 while( *res++ != '\n' );
1283 while( sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1284 bssid, &freq, &rssi, cipher, ssid) > 0 )
1287 e->mac[0] = strtol(&bssid[0], NULL, 16);
1288 e->mac[1] = strtol(&bssid[3], NULL, 16);
1289 e->mac[2] = strtol(&bssid[6], NULL, 16);
1290 e->mac[3] = strtol(&bssid[9], NULL, 16);
1291 e->mac[4] = strtol(&bssid[12], NULL, 16);
1292 e->mac[5] = strtol(&bssid[15], NULL, 16);
1295 memcpy(e->ssid, ssid,
1296 min(strlen(ssid), sizeof(e->ssid) - 1));
1298 /* Mode (assume master) */
1299 sprintf((char *)e->mode, "Master");
1302 e->channel = nl80211_freq2channel(freq);
1310 /* The cfg80211 wext compat layer assumes a signal range
1311 * of -110 dBm to -40 dBm, the quality value is derived
1312 * by adding 110 to the signal level */
1315 else if( rssi > -40 )
1318 e->quality = (rssi + 110);
1326 e->quality_max = qmax;
1329 nl80211_get_scancrypto(cipher, &e->crypto);
1331 /* advance to next line */
1332 while( *res && *res++ != '\n' );
1337 memset(ssid, 0, sizeof(ssid));
1338 memset(bssid, 0, sizeof(bssid));
1339 memset(cipher, 0, sizeof(cipher));
1342 *len = count * sizeof(struct iwinfo_scanlist_entry);
1350 /* Got a temp interface, don't create yet another one */
1351 if( !strncmp(ifname, "tmp.", 4) )
1353 if( !iwinfo_ifup(ifname) )
1356 wext_get_scanlist(ifname, buf, len);
1357 iwinfo_ifdown(ifname);
1361 /* Spawn a new scan interface */
1364 if( !(res = nl80211_ifadd(ifname)) )
1367 if( !iwinfo_ifmac(res) )
1370 /* if we can take the new interface up, the driver supports an
1371 * additional interface and there's no need to tear down the ap */
1372 if( iwinfo_ifup(res) )
1374 wext_get_scanlist(res, buf, len);
1378 /* driver cannot create secondary interface, take down ap
1380 else if( iwinfo_ifdown(ifname) && iwinfo_ifup(res) )
1382 wext_get_scanlist(res, buf, len);
1384 iwinfo_ifup(ifname);
1385 nl80211_hostapd_hup(ifname);
1397 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1399 int count = 0, bands_remain, freqs_remain;
1400 struct nl80211_msg_conveyor *req, *res;
1401 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1402 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1403 struct nlattr *band, *freq;
1404 struct iwinfo_freqlist_entry *e = (struct iwinfo_freqlist_entry *)buf;
1406 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1409 res = nl80211_send(req);
1412 nla_for_each_nested(band,
1413 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1415 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1416 nla_len(band), NULL);
1418 nla_for_each_nested(freq,
1419 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1421 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1422 nla_data(freq), nla_len(freq), NULL);
1424 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1425 freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1428 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1429 e->channel = nl80211_freq2channel(e->mhz);
1432 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1433 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
1434 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1448 *len = count * sizeof(struct iwinfo_freqlist_entry);
1455 int nl80211_get_country(const char *ifname, char *buf)
1458 struct nl80211_msg_conveyor *req, *res;
1460 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1463 res = nl80211_send(req);
1466 if( res->attr[NL80211_ATTR_REG_ALPHA2] )
1468 memcpy(buf, nla_data(res->attr[NL80211_ATTR_REG_ALPHA2]), 2);
1479 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1482 struct iwinfo_iso3166_label *l;
1483 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1485 for( l = ISO3166_Names, count = 0; l->iso3166; l++, e++, count++ )
1487 e->iso3166 = l->iso3166;
1488 e->ccode[0] = (l->iso3166 / 256);
1489 e->ccode[1] = (l->iso3166 % 256);
1492 *len = (count * sizeof(struct iwinfo_country_entry));
1496 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1498 int bands_remain, freqs_remain;
1499 struct nl80211_msg_conveyor *req, *res;
1500 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1501 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1502 struct nlattr *band, *freq;
1505 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1508 res = nl80211_send(req);
1511 nla_for_each_nested(band,
1512 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1514 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1515 nla_len(band), NULL);
1517 if( bands[NL80211_BAND_ATTR_HT_CAPA] )
1518 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1520 /* Treat any nonzero capability as 11n */
1522 *buf |= IWINFO_80211_N;
1524 nla_for_each_nested(freq,
1525 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1527 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1528 nla_data(freq), nla_len(freq), NULL);
1530 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] )
1533 if( nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485 )
1535 *buf |= IWINFO_80211_B;
1536 *buf |= IWINFO_80211_G;
1540 *buf |= IWINFO_80211_A;
1549 return *buf ? 0 : -1;
1552 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1554 /* Test whether we can create another interface */
1555 char *nif = nl80211_ifadd(ifname);
1559 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));