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)
111 static void nl80211_free(struct nl80211_msg_conveyor *cv)
126 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, int cmd, int flags)
128 static struct nl80211_msg_conveyor cv;
130 int ifidx = -1, phyidx = -1;
131 struct nl_msg *req = NULL;
132 struct nl_cb *cb = NULL;
134 if (nl80211_init() < 0)
137 if (!strncmp(ifname, "phy", 3))
138 phyidx = atoi(&ifname[3]);
139 else if (!strncmp(ifname, "radio", 5))
140 phyidx = atoi(&ifname[5]);
141 else if (!strncmp(ifname, "mon.", 4))
142 ifidx = if_nametoindex(&ifname[4]);
144 ifidx = if_nametoindex(ifname);
146 if ((ifidx < 0) && (phyidx < 0))
153 cb = nl_cb_alloc(NL_CB_DEFAULT);
157 genlmsg_put(req, 0, 0, genl_family_get_id(nls->nl80211), 0,
161 NLA_PUT_U32(req, NL80211_ATTR_IFINDEX, ifidx);
164 NLA_PUT_U32(req, NL80211_ATTR_WIPHY, phyidx);
182 static struct nl80211_msg_conveyor * nl80211_send(
183 struct nl80211_msg_conveyor *cv,
184 int (*cb_func)(struct nl_msg *, void *), void *cb_arg
186 static struct nl80211_msg_conveyor rcv;
190 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
192 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
194 if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
197 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
198 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
199 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
202 nl_recvmsgs(nls->nl_sock, cv->cb);
213 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
215 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
216 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
218 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
219 genlmsg_attrlen(gnlh, 0), NULL);
224 static int nl80211_freq2channel(int freq)
230 return (freq - 2407) / 5;
232 return (freq / 5) - 1000;
235 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
238 char lkey[64] = { 0 };
239 const char *ln = buf;
240 static char lval[256] = { 0 };
242 int matched_if = ifname ? 0 : 1;
245 for( i = 0, len = strlen(buf); i < len; i++ )
247 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
251 else if (!lkey[0] && (buf[i] == '='))
253 if ((&buf[i] - ln) > 0)
254 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
256 else if (buf[i] == '\n')
260 memcpy(lval, ln + strlen(lkey) + 1,
261 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
263 if ((ifname != NULL) &&
264 (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
266 matched_if = !strcmp(lval, ifname);
268 else if (matched_if && !strcmp(lkey, key))
275 memset(lkey, 0, sizeof(lkey));
276 memset(lval, 0, sizeof(lval));
283 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
286 struct nlattr **attr = nl80211_parse(msg);
288 if (attr[NL80211_ATTR_WIPHY_NAME])
289 sprintf(buf, "%s", nla_data(attr[NL80211_ATTR_WIPHY_NAME]));
296 static char * nl80211_ifname2phy(const char *ifname)
298 static char phy[32] = { 0 };
299 struct nl80211_msg_conveyor *req;
301 memset(phy, 0, sizeof(phy));
303 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
306 nl80211_send(req, nl80211_ifname2phy_cb, phy);
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,
362 size_t remote_length, local_length;
363 static char buffer[10240] = { 0 };
365 struct sockaddr_un local = { 0 };
366 struct sockaddr_un remote = { 0 };
369 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
373 remote.sun_family = AF_UNIX;
374 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
375 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
377 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
380 if (connect(sock, (struct sockaddr *) &remote, remote_length))
383 local.sun_family = AF_UNIX;
384 local_length = sizeof(local.sun_family) + sprintf(local.sun_path,
385 "/var/run/iwinfo-%s-%d", ifname, getpid());
387 if (bind(sock, (struct sockaddr *) &local, local_length))
391 send(sock, "ATTACH", 6, 0);
393 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
397 send(sock, cmd, strlen(cmd), 0);
399 while( numtry++ < 5 )
401 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
409 if ((!event && buffer[0] != '<') || strstr(buffer, event))
418 if (local.sun_family)
419 unlink(local.sun_path);
424 static inline int nl80211_readint(const char *path)
430 if ((fd = open(path, O_RDONLY)) > -1)
432 if (read(fd, buffer, sizeof(buffer)) > 0)
441 static char * nl80211_phy2ifname(const char *ifname)
443 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
445 static char nif[IFNAMSIZ] = { 0 };
452 else if (!strncmp(ifname, "phy", 3))
453 phyidx = atoi(&ifname[3]);
454 else if (!strncmp(ifname, "radio", 5))
455 phyidx = atoi(&ifname[5]);
457 memset(nif, 0, sizeof(nif));
461 if ((d = opendir("/sys/class/net")) != NULL)
463 while( (e = readdir(d)) != NULL )
465 snprintf(buffer, sizeof(buffer),
466 "/sys/class/net/%s/phy80211/index", e->d_name);
468 if (nl80211_readint(buffer) == phyidx)
470 snprintf(buffer, sizeof(buffer),
471 "/sys/class/net/%s/ifindex", e->d_name);
473 if( (cifidx = nl80211_readint(buffer)) >= 0 &&
474 ((ifidx < 0) || (cifidx < ifidx)) )
477 strncpy(nif, e->d_name, sizeof(nif));
486 return nif[0] ? nif : NULL;
489 static char * nl80211_ifadd(const char *ifname)
493 static char nif[IFNAMSIZ] = { 0 };
494 struct nl80211_msg_conveyor *req, *res;
496 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
499 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
501 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
502 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
504 nl80211_send(req, NULL, NULL);
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_send(req, NULL, NULL);
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_fill_signal_cb(struct nl_msg *msg, void *arg)
661 struct nl80211_rssi_rate *rr = arg;
662 struct nlattr **attr = nl80211_parse(msg);
663 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
664 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
666 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
667 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
668 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
669 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
670 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
671 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
672 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
673 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
674 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
675 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
676 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
679 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
680 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
681 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
682 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
683 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
686 if (attr[NL80211_ATTR_STA_INFO])
688 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
689 attr[NL80211_ATTR_STA_INFO], stats_policy) )
691 if (sinfo[NL80211_STA_INFO_SIGNAL])
693 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
694 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
697 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
699 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
700 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
702 if (rinfo[NL80211_RATE_INFO_BITRATE])
704 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
706 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
716 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
720 struct nl80211_msg_conveyor *req;
725 if ((d = opendir("/sys/class/net")) != NULL)
727 while ((de = readdir(d)) != NULL)
729 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
730 (!de->d_name[strlen(ifname)] ||
731 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
733 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
738 nl80211_send(req, nl80211_fill_signal_cb, r);
748 int nl80211_get_bitrate(const char *ifname, int *buf)
750 struct nl80211_rssi_rate rr;
752 if (!wext_get_bitrate(ifname, buf))
755 nl80211_fill_signal(ifname, &rr);
759 *buf = (rr.rate * 100);
766 int nl80211_get_signal(const char *ifname, int *buf)
768 struct nl80211_rssi_rate rr;
770 if (!wext_get_signal(ifname, buf))
773 nl80211_fill_signal(ifname, &rr);
784 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
787 struct nlattr **tb = nl80211_parse(msg);
788 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
790 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
791 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
792 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
795 if (!tb[NL80211_ATTR_SURVEY_INFO])
798 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
799 tb[NL80211_ATTR_SURVEY_INFO], sp))
802 if (!si[NL80211_SURVEY_INFO_NOISE])
805 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
806 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
812 int nl80211_get_noise(const char *ifname, int *buf)
815 struct nl80211_msg_conveyor *req;
817 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
822 nl80211_send(req, nl80211_get_noise_cb, &noise);
835 int nl80211_get_quality(const char *ifname, int *buf)
839 if (wext_get_quality(ifname, buf))
843 if (!nl80211_get_signal(ifname, &signal))
845 /* A positive signal level is usually just a quality
846 * value, pass through as-is */
852 /* The cfg80211 wext compat layer assumes a signal range
853 * of -110 dBm to -40 dBm, the quality value is derived
854 * by adding 110 to the signal level */
859 else if (signal > -40)
862 *buf = (signal + 110);
870 int nl80211_get_quality_max(const char *ifname, int *buf)
872 if (wext_get_quality_max(ifname, buf))
873 /* The cfg80211 wext compat layer assumes a maximum
880 int nl80211_get_encryption(const char *ifname, char *buf)
885 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
888 if( (res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
889 (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
892 if (strstr(val, "WEP"))
894 if (strstr(val, "WEP-40"))
895 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
897 else if (strstr(val, "WEP-104"))
898 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
901 c->group_ciphers = c->pair_ciphers;
903 c->auth_suites |= IWINFO_KMGMT_NONE;
904 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
910 if (strstr(val, "TKIP"))
911 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
913 else if (strstr(val, "CCMP"))
914 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
916 else if (strstr(val, "NONE"))
917 c->pair_ciphers |= IWINFO_CIPHER_NONE;
919 else if (strstr(val, "WEP-40"))
920 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
922 else if (strstr(val, "WEP-104"))
923 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
926 if ((val = nl80211_getval(NULL, res, "group_cipher")))
928 if (strstr(val, "TKIP"))
929 c->group_ciphers |= IWINFO_CIPHER_TKIP;
931 else if (strstr(val, "CCMP"))
932 c->group_ciphers |= IWINFO_CIPHER_CCMP;
934 else if (strstr(val, "NONE"))
935 c->group_ciphers |= IWINFO_CIPHER_NONE;
937 else if (strstr(val, "WEP-40"))
938 c->group_ciphers |= IWINFO_CIPHER_WEP40;
940 else if (strstr(val, "WEP-104"))
941 c->group_ciphers |= IWINFO_CIPHER_WEP104;
945 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
947 if (strstr(val, "WPA2"))
950 else if (strstr(val, "WPA"))
954 if (strstr(val, "PSK"))
955 c->auth_suites |= IWINFO_KMGMT_PSK;
957 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
958 c->auth_suites |= IWINFO_KMGMT_8021x;
960 else if (strstr(val, "NONE"))
961 c->auth_suites |= IWINFO_KMGMT_NONE;
964 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
971 else if ((res = nl80211_hostapd_info(ifname)))
973 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
974 c->wpa_version = atoi(val);
976 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
978 if (!val || strstr(val, "PSK"))
979 c->auth_suites |= IWINFO_KMGMT_PSK;
981 if (val && strstr(val, "EAP"))
982 c->auth_suites |= IWINFO_KMGMT_8021x;
984 if (val && strstr(val, "NONE"))
985 c->auth_suites |= IWINFO_KMGMT_NONE;
987 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
989 if (strstr(val, "TKIP"))
990 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
992 if (strstr(val, "CCMP"))
993 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
995 if (strstr(val, "NONE"))
996 c->pair_ciphers |= IWINFO_CIPHER_NONE;
999 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1003 c->auth_algs |= IWINFO_AUTH_OPEN;
1007 c->auth_algs |= IWINFO_AUTH_SHARED;
1011 c->auth_algs |= IWINFO_AUTH_OPEN;
1012 c->auth_algs |= IWINFO_AUTH_SHARED;
1019 for( i = 0; i < 4; i++ )
1021 snprintf(k, sizeof(k), "wep_key%d", i);
1023 if ((val = nl80211_getval(ifname, res, k)))
1025 if ((strlen(val) == 5) || (strlen(val) == 10))
1026 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1028 else if ((strlen(val) == 13) || (strlen(val) == 26))
1029 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1034 c->group_ciphers = c->pair_ciphers;
1035 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1044 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1046 struct nl80211_array_buf *arr = arg;
1047 struct iwinfo_assoclist_entry *e = arr->buf;
1048 struct nlattr **attr = nl80211_parse(msg);
1049 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1051 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1052 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1053 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1054 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1055 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1056 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1057 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1058 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1059 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1060 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1061 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1064 /* advance to end of array */
1067 if (attr[NL80211_ATTR_MAC])
1068 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1070 if (attr[NL80211_ATTR_STA_INFO])
1072 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1073 attr[NL80211_ATTR_STA_INFO], stats_policy))
1075 if (sinfo[NL80211_STA_INFO_SIGNAL])
1076 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1080 e->noise = 0; /* filled in by caller */
1086 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1091 struct nl80211_msg_conveyor *req;
1092 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1093 struct iwinfo_assoclist_entry *e;
1095 if ((d = opendir("/sys/class/net")) != NULL)
1097 while ((de = readdir(d)) != NULL)
1099 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1100 (!de->d_name[strlen(ifname)] ||
1101 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1103 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1108 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1118 if (!nl80211_get_noise(ifname, &noise))
1119 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1122 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1129 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1132 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1134 struct nlattr **attr = nl80211_parse(msg);
1135 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1136 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1137 struct nlattr *band, *freq;
1139 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1140 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1141 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1142 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1143 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1144 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1145 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1148 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1151 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1153 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1154 nla_len(band), NULL);
1156 nla_for_each_nested(freq,
1157 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1159 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1160 nla_data(freq), nla_len(freq), freq_policy);
1162 ch_cmp = nl80211_freq2channel(
1163 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1165 if( (!ch_cur || (ch_cmp == ch_cur)) &&
1166 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1168 *dbm_max = (int)(0.01 * nla_get_u32(
1169 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1179 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1182 int dbm_max = -1, dbm_cur, dbm_cnt;
1183 struct nl80211_msg_conveyor *req;
1184 struct iwinfo_txpwrlist_entry entry;
1186 if (nl80211_get_channel(ifname, &ch_cur))
1189 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1192 /* initialize the value pointer with channel for callback */
1195 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1201 for (dbm_cur = 0, dbm_cnt = 0;
1203 dbm_cur++, dbm_cnt++)
1205 entry.dbm = dbm_cur;
1206 entry.mw = iwinfo_dbm2mw(dbm_cur);
1208 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1211 entry.dbm = dbm_max;
1212 entry.mw = iwinfo_dbm2mw(dbm_max);
1214 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1217 *len = dbm_cnt * sizeof(entry);
1224 static void nl80211_get_scancrypto(const char *spec,
1225 struct iwinfo_crypto_entry *c)
1227 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1231 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1234 else if (strstr(spec, "WPA2"))
1237 else if (strstr(spec, "WPA"))
1240 else if (strstr(spec, "WEP"))
1241 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1244 if (strstr(spec, "PSK"))
1245 c->auth_suites |= IWINFO_KMGMT_PSK;
1247 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1248 c->auth_suites |= IWINFO_KMGMT_8021x;
1250 if (strstr(spec, "WPA-NONE"))
1251 c->auth_suites |= IWINFO_KMGMT_NONE;
1254 if (strstr(spec, "TKIP"))
1255 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1257 if (strstr(spec, "CCMP"))
1258 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1260 if (strstr(spec, "WEP-40"))
1261 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1263 if (strstr(spec, "WEP-104"))
1264 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1266 c->group_ciphers = c->pair_ciphers;
1274 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1276 int freq, rssi, qmax, count;
1278 char ssid[128] = { 0 };
1279 char bssid[18] = { 0 };
1280 char cipher[256] = { 0 };
1282 /* Got a radioX pseudo interface, find some interface on it or create one */
1283 if (!strncmp(ifname, "radio", 5))
1285 /* Reuse existing interface */
1286 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1288 return nl80211_get_scanlist(res, buf, len);
1291 /* Need to spawn a temporary iface for scanning */
1292 else if ((res = nl80211_ifadd(ifname)) != NULL)
1294 count = nl80211_get_scanlist(res, buf, len);
1300 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1302 /* WPA supplicant */
1303 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1305 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1307 nl80211_get_quality_max(ifname, &qmax);
1309 /* skip header line */
1310 while( *res++ != '\n' );
1314 while( sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1315 bssid, &freq, &rssi, cipher, ssid) > 0 )
1318 e->mac[0] = strtol(&bssid[0], NULL, 16);
1319 e->mac[1] = strtol(&bssid[3], NULL, 16);
1320 e->mac[2] = strtol(&bssid[6], NULL, 16);
1321 e->mac[3] = strtol(&bssid[9], NULL, 16);
1322 e->mac[4] = strtol(&bssid[12], NULL, 16);
1323 e->mac[5] = strtol(&bssid[15], NULL, 16);
1326 memcpy(e->ssid, ssid,
1327 min(strlen(ssid), sizeof(e->ssid) - 1));
1329 /* Mode (assume master) */
1330 sprintf((char *)e->mode, "Master");
1333 e->channel = nl80211_freq2channel(freq);
1341 /* The cfg80211 wext compat layer assumes a signal range
1342 * of -110 dBm to -40 dBm, the quality value is derived
1343 * by adding 110 to the signal level */
1346 else if (rssi > -40)
1349 e->quality = (rssi + 110);
1357 e->quality_max = qmax;
1360 nl80211_get_scancrypto(cipher, &e->crypto);
1362 /* advance to next line */
1363 while( *res && *res++ != '\n' );
1368 memset(ssid, 0, sizeof(ssid));
1369 memset(bssid, 0, sizeof(bssid));
1370 memset(cipher, 0, sizeof(cipher));
1373 *len = count * sizeof(struct iwinfo_scanlist_entry);
1381 /* Got a temp interface, don't create yet another one */
1382 if (!strncmp(ifname, "tmp.", 4))
1384 if (!iwinfo_ifup(ifname))
1387 wext_get_scanlist(ifname, buf, len);
1388 iwinfo_ifdown(ifname);
1392 /* Spawn a new scan interface */
1395 if (!(res = nl80211_ifadd(ifname)))
1398 if (!iwinfo_ifmac(res))
1401 /* if we can take the new interface up, the driver supports an
1402 * additional interface and there's no need to tear down the ap */
1403 if (iwinfo_ifup(res))
1405 wext_get_scanlist(res, buf, len);
1409 /* driver cannot create secondary interface, take down ap
1411 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1413 wext_get_scanlist(res, buf, len);
1415 iwinfo_ifup(ifname);
1416 nl80211_hostapd_hup(ifname);
1428 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
1430 int bands_remain, freqs_remain;
1432 struct nl80211_array_buf *arr = arg;
1433 struct iwinfo_freqlist_entry *e = arr->buf;
1435 struct nlattr **attr = nl80211_parse(msg);
1436 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1437 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1438 struct nlattr *band, *freq;
1440 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1441 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1442 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1443 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1444 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1445 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1446 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1449 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1451 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1452 nla_len(band), NULL);
1454 nla_for_each_nested(freq,
1455 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1457 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1458 nla_data(freq), nla_len(freq), NULL);
1460 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1461 freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1464 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1465 e->channel = nl80211_freq2channel(e->mhz);
1468 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1469 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
1470 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1481 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1483 struct nl80211_msg_conveyor *req;
1484 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1486 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1489 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
1495 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
1502 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
1505 struct nlattr **attr = nl80211_parse(msg);
1507 if (attr[NL80211_ATTR_REG_ALPHA2])
1508 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
1515 int nl80211_get_country(const char *ifname, char *buf)
1518 struct nl80211_msg_conveyor *req;
1520 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1523 nl80211_send(req, nl80211_get_country_cb, buf);
1533 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1536 struct iwinfo_iso3166_label *l;
1537 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1539 for( l = ISO3166_Names, count = 0; l->iso3166; l++, e++, count++ )
1541 e->iso3166 = l->iso3166;
1542 e->ccode[0] = (l->iso3166 / 256);
1543 e->ccode[1] = (l->iso3166 % 256);
1546 *len = (count * sizeof(struct iwinfo_country_entry));
1550 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
1553 int bands_remain, freqs_remain;
1555 struct nlattr **attr = nl80211_parse(msg);
1556 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1557 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1558 struct nlattr *band, *freq;
1562 if (attr[NL80211_ATTR_WIPHY_BANDS])
1564 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1566 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1567 nla_len(band), NULL);
1569 if (bands[NL80211_BAND_ATTR_HT_CAPA])
1570 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1572 /* Treat any nonzero capability as 11n */
1574 *modes |= IWINFO_80211_N;
1576 nla_for_each_nested(freq,
1577 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1579 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1580 nla_data(freq), nla_len(freq), NULL);
1582 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
1585 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
1587 *modes |= IWINFO_80211_B;
1588 *modes |= IWINFO_80211_G;
1592 *modes |= IWINFO_80211_A;
1601 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1603 struct nl80211_msg_conveyor *req;
1605 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1608 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
1612 return *buf ? 0 : -1;
1615 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1617 /* Test whether we can create another interface */
1618 char *nif = nl80211_ifadd(ifname);
1622 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));