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 static struct nl80211_state *nls = NULL;
32 static int nl80211_init(void)
38 nls = malloc(sizeof(struct nl80211_state));
44 nls->nl_sock = nl_socket_alloc();
50 if( genl_connect(nls->nl_sock)) {
55 fd = nl_socket_get_fd(nls->nl_sock);
56 if (fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC) < 0)
62 if( genl_ctrl_alloc_cache(nls->nl_sock, &nls->nl_cache)) {
67 nls->nl80211 = genl_ctrl_search_by_name(nls->nl_cache, "nl80211");
83 static int nl80211_msg_error(struct sockaddr_nl *nla,
84 struct nlmsgerr *err, void *arg)
91 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
98 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
105 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
110 static void nl80211_free(struct nl80211_msg_conveyor *cv)
125 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname, int cmd, int flags)
127 static struct nl80211_msg_conveyor cv;
129 int ifidx = -1, phyidx = -1;
130 struct nl_msg *req = NULL;
131 struct nl_cb *cb = NULL;
133 if (nl80211_init() < 0)
136 if (!strncmp(ifname, "phy", 3))
137 phyidx = atoi(&ifname[3]);
138 else if (!strncmp(ifname, "radio", 5))
139 phyidx = atoi(&ifname[5]);
140 else if (!strncmp(ifname, "mon.", 4))
141 ifidx = if_nametoindex(&ifname[4]);
143 ifidx = if_nametoindex(ifname);
145 if ((ifidx < 0) && (phyidx < 0))
152 cb = nl_cb_alloc(NL_CB_DEFAULT);
156 genlmsg_put(req, 0, 0, genl_family_get_id(nls->nl80211), 0,
160 NLA_PUT_U32(req, NL80211_ATTR_IFINDEX, ifidx);
163 NLA_PUT_U32(req, NL80211_ATTR_WIPHY, phyidx);
181 static struct nl80211_msg_conveyor * nl80211_send(
182 struct nl80211_msg_conveyor *cv,
183 int (*cb_func)(struct nl_msg *, void *), void *cb_arg
185 static struct nl80211_msg_conveyor rcv;
189 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
191 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
193 if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
196 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
197 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
198 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
201 nl_recvmsgs(nls->nl_sock, cv->cb);
212 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
214 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
215 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
217 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
218 genlmsg_attrlen(gnlh, 0), NULL);
223 static int nl80211_freq2channel(int freq)
229 return (freq - 2407) / 5;
231 return (freq / 5) - 1000;
234 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
237 char lkey[64] = { 0 };
238 const char *ln = buf;
239 static char lval[256] = { 0 };
241 int matched_if = ifname ? 0 : 1;
244 for( i = 0, len = strlen(buf); i < len; i++ )
246 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
250 else if (!lkey[0] && (buf[i] == '='))
252 if ((&buf[i] - ln) > 0)
253 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
255 else if (buf[i] == '\n')
259 memcpy(lval, ln + strlen(lkey) + 1,
260 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
262 if ((ifname != NULL) &&
263 (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
265 matched_if = !strcmp(lval, ifname);
267 else if (matched_if && !strcmp(lkey, key))
274 memset(lkey, 0, sizeof(lkey));
275 memset(lval, 0, sizeof(lval));
282 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
285 struct nlattr **attr = nl80211_parse(msg);
287 if (attr[NL80211_ATTR_WIPHY_NAME])
288 sprintf(buf, "%s", nla_data(attr[NL80211_ATTR_WIPHY_NAME]));
295 static char * nl80211_ifname2phy(const char *ifname)
297 static char phy[32] = { 0 };
298 struct nl80211_msg_conveyor *req;
300 memset(phy, 0, sizeof(phy));
302 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
305 nl80211_send(req, nl80211_ifname2phy_cb, phy);
309 return phy[0] ? phy : NULL;
312 static char * nl80211_hostapd_info(const char *ifname)
315 char path[32] = { 0 };
316 static char buf[4096] = { 0 };
319 if ((phy = nl80211_ifname2phy(ifname)) != NULL)
321 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
323 if ((conf = fopen(path, "r")) != NULL)
325 fread(buf, sizeof(buf) - 1, 1, conf);
335 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
338 struct timeval tv = { 2, 0 };
343 memset(buf, 0, blen);
346 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
349 if (!FD_ISSET(sock, &rfds))
352 return recv(sock, buf, blen, 0);
355 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);
398 while( numtry++ < 5 )
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]);
456 memset(nif, 0, sizeof(nif));
460 if ((d = opendir("/sys/class/net")) != NULL)
462 while( (e = readdir(d)) != NULL )
464 snprintf(buffer, sizeof(buffer),
465 "/sys/class/net/%s/phy80211/index", e->d_name);
467 if (nl80211_readint(buffer) == phyidx)
469 snprintf(buffer, sizeof(buffer),
470 "/sys/class/net/%s/ifindex", e->d_name);
472 if( (cifidx = nl80211_readint(buffer)) >= 0 &&
473 ((ifidx < 0) || (cifidx < ifidx)) )
476 strncpy(nif, e->d_name, sizeof(nif));
485 return nif[0] ? nif : NULL;
488 static char * nl80211_ifadd(const char *ifname)
492 static char nif[IFNAMSIZ] = { 0 };
493 struct nl80211_msg_conveyor *req, *res;
495 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
498 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
500 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
501 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
503 nl80211_send(req, NULL, NULL);
514 static void nl80211_ifdel(const char *ifname)
516 struct nl80211_msg_conveyor *req;
518 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
521 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
523 nl80211_send(req, NULL, NULL);
530 static void nl80211_hostapd_hup(const char *ifname)
534 char *phy = nl80211_ifname2phy(ifname);
538 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
539 if ((fd = open(buf, O_RDONLY)) > 0)
541 if (read(fd, buf, sizeof(buf)) > 0)
553 int nl80211_probe(const char *ifname)
555 return !!nl80211_ifname2phy(ifname);
558 void nl80211_close(void)
563 nl_socket_free(nls->nl_sock);
566 nl_cache_free(nls->nl_cache);
573 int nl80211_get_mode(const char *ifname, char *buf)
575 return wext_get_mode(ifname, buf);
578 int nl80211_get_ssid(const char *ifname, char *buf)
582 if (!wext_get_ssid(ifname, buf))
586 else if( (ssid = nl80211_hostapd_info(ifname)) &&
587 (ssid = nl80211_getval(ifname, ssid, "ssid")) )
589 memcpy(buf, ssid, strlen(ssid));
596 int nl80211_get_bssid(const char *ifname, char *buf)
599 unsigned char mac[6];
601 if (!wext_get_bssid(ifname, buf))
605 else if((bssid = nl80211_hostapd_info(ifname)) &&
606 (bssid = nl80211_getval(ifname, bssid, "bssid")))
608 mac[0] = strtol(&bssid[0], NULL, 16);
609 mac[1] = strtol(&bssid[3], NULL, 16);
610 mac[2] = strtol(&bssid[6], NULL, 16);
611 mac[3] = strtol(&bssid[9], NULL, 16);
612 mac[4] = strtol(&bssid[12], NULL, 16);
613 mac[5] = strtol(&bssid[15], NULL, 16);
615 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
616 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
624 int nl80211_get_channel(const char *ifname, int *buf)
628 if (!wext_get_channel(ifname, buf))
631 else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
632 return wext_get_channel(first, buf);
637 int nl80211_get_frequency(const char *ifname, int *buf)
641 if (!wext_get_frequency(ifname, buf))
644 else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
645 return wext_get_frequency(first, buf);
650 int nl80211_get_txpower(const char *ifname, int *buf)
652 return wext_get_txpower(ifname, buf);
656 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
660 struct nl80211_rssi_rate *rr = arg;
661 struct nlattr **attr = nl80211_parse(msg);
662 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
663 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
665 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
666 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
667 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
668 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
669 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
670 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
671 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
672 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
673 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
674 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
675 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
678 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
679 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
680 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
681 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
682 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
685 if (attr[NL80211_ATTR_STA_INFO])
687 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
688 attr[NL80211_ATTR_STA_INFO], stats_policy) )
690 if (sinfo[NL80211_STA_INFO_SIGNAL])
692 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
693 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
696 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
698 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
699 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
701 if (rinfo[NL80211_RATE_INFO_BITRATE])
703 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
705 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
715 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
719 struct nl80211_msg_conveyor *req;
724 if ((d = opendir("/sys/class/net")) != NULL)
726 while ((de = readdir(d)) != NULL)
728 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
729 (!de->d_name[strlen(ifname)] ||
730 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
732 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
737 nl80211_send(req, nl80211_fill_signal_cb, r);
747 int nl80211_get_bitrate(const char *ifname, int *buf)
749 struct nl80211_rssi_rate rr;
751 if (!wext_get_bitrate(ifname, buf))
754 nl80211_fill_signal(ifname, &rr);
758 *buf = (rr.rate * 100);
765 int nl80211_get_signal(const char *ifname, int *buf)
767 struct nl80211_rssi_rate rr;
769 if (!wext_get_signal(ifname, buf))
772 nl80211_fill_signal(ifname, &rr);
783 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
786 struct nlattr **tb = nl80211_parse(msg);
787 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
789 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
790 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
791 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
794 if (!tb[NL80211_ATTR_SURVEY_INFO])
797 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
798 tb[NL80211_ATTR_SURVEY_INFO], sp))
801 if (!si[NL80211_SURVEY_INFO_NOISE])
804 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
805 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
811 int nl80211_get_noise(const char *ifname, int *buf)
814 struct nl80211_msg_conveyor *req;
816 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
821 nl80211_send(req, nl80211_get_noise_cb, &noise);
834 int nl80211_get_quality(const char *ifname, int *buf)
838 if (wext_get_quality(ifname, buf))
842 if (!nl80211_get_signal(ifname, &signal))
844 /* A positive signal level is usually just a quality
845 * value, pass through as-is */
851 /* The cfg80211 wext compat layer assumes a signal range
852 * of -110 dBm to -40 dBm, the quality value is derived
853 * by adding 110 to the signal level */
858 else if (signal > -40)
861 *buf = (signal + 110);
869 int nl80211_get_quality_max(const char *ifname, int *buf)
871 if (wext_get_quality_max(ifname, buf))
872 /* The cfg80211 wext compat layer assumes a maximum
879 int nl80211_get_encryption(const char *ifname, char *buf)
884 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
887 if( (res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
888 (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
891 if (strstr(val, "WEP"))
893 if (strstr(val, "WEP-40"))
894 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
896 else if (strstr(val, "WEP-104"))
897 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
900 c->group_ciphers = c->pair_ciphers;
902 c->auth_suites |= IWINFO_KMGMT_NONE;
903 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
909 if (strstr(val, "TKIP"))
910 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
912 else if (strstr(val, "CCMP"))
913 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
915 else if (strstr(val, "NONE"))
916 c->pair_ciphers |= IWINFO_CIPHER_NONE;
918 else if (strstr(val, "WEP-40"))
919 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
921 else if (strstr(val, "WEP-104"))
922 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
925 if ((val = nl80211_getval(NULL, res, "group_cipher")))
927 if (strstr(val, "TKIP"))
928 c->group_ciphers |= IWINFO_CIPHER_TKIP;
930 else if (strstr(val, "CCMP"))
931 c->group_ciphers |= IWINFO_CIPHER_CCMP;
933 else if (strstr(val, "NONE"))
934 c->group_ciphers |= IWINFO_CIPHER_NONE;
936 else if (strstr(val, "WEP-40"))
937 c->group_ciphers |= IWINFO_CIPHER_WEP40;
939 else if (strstr(val, "WEP-104"))
940 c->group_ciphers |= IWINFO_CIPHER_WEP104;
944 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
946 if (strstr(val, "WPA2"))
949 else if (strstr(val, "WPA"))
953 if (strstr(val, "PSK"))
954 c->auth_suites |= IWINFO_KMGMT_PSK;
956 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
957 c->auth_suites |= IWINFO_KMGMT_8021x;
959 else if (strstr(val, "NONE"))
960 c->auth_suites |= IWINFO_KMGMT_NONE;
963 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
970 else if ((res = nl80211_hostapd_info(ifname)))
972 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
973 c->wpa_version = atoi(val);
975 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
977 if (!val || strstr(val, "PSK"))
978 c->auth_suites |= IWINFO_KMGMT_PSK;
980 if (val && strstr(val, "EAP"))
981 c->auth_suites |= IWINFO_KMGMT_8021x;
983 if (val && strstr(val, "NONE"))
984 c->auth_suites |= IWINFO_KMGMT_NONE;
986 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
988 if (strstr(val, "TKIP"))
989 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
991 if (strstr(val, "CCMP"))
992 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
994 if (strstr(val, "NONE"))
995 c->pair_ciphers |= IWINFO_CIPHER_NONE;
998 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1002 c->auth_algs |= IWINFO_AUTH_OPEN;
1006 c->auth_algs |= IWINFO_AUTH_SHARED;
1010 c->auth_algs |= IWINFO_AUTH_OPEN;
1011 c->auth_algs |= IWINFO_AUTH_SHARED;
1018 for( i = 0; i < 4; i++ )
1020 snprintf(k, sizeof(k), "wep_key%d", i);
1022 if ((val = nl80211_getval(ifname, res, k)))
1024 if ((strlen(val) == 5) || (strlen(val) == 10))
1025 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1027 else if ((strlen(val) == 13) || (strlen(val) == 26))
1028 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1033 c->group_ciphers = c->pair_ciphers;
1034 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1043 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1045 struct nl80211_array_buf *arr = arg;
1046 struct iwinfo_assoclist_entry *e = arr->buf;
1047 struct nlattr **attr = nl80211_parse(msg);
1048 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1050 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1051 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1052 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1053 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1054 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1055 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1056 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1057 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1058 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1059 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1060 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1063 /* advance to end of array */
1066 if (attr[NL80211_ATTR_MAC])
1067 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1069 if (attr[NL80211_ATTR_STA_INFO])
1071 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1072 attr[NL80211_ATTR_STA_INFO], stats_policy))
1074 if (sinfo[NL80211_STA_INFO_SIGNAL])
1075 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1079 e->noise = 0; /* filled in by caller */
1085 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1090 struct nl80211_msg_conveyor *req;
1091 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1092 struct iwinfo_assoclist_entry *e;
1094 if ((d = opendir("/sys/class/net")) != NULL)
1096 while ((de = readdir(d)) != NULL)
1098 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1099 (!de->d_name[strlen(ifname)] ||
1100 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1102 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1107 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1117 if (!nl80211_get_noise(ifname, &noise))
1118 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1121 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1128 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1131 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1133 struct nlattr **attr = nl80211_parse(msg);
1134 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1135 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1136 struct nlattr *band, *freq;
1138 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1139 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1140 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1141 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1142 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1143 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1144 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1147 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1150 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1152 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1153 nla_len(band), NULL);
1155 nla_for_each_nested(freq,
1156 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1158 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1159 nla_data(freq), nla_len(freq), freq_policy);
1161 ch_cmp = nl80211_freq2channel(
1162 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1164 if( (!ch_cur || (ch_cmp == ch_cur)) &&
1165 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1167 *dbm_max = (int)(0.01 * nla_get_u32(
1168 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1178 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1181 int dbm_max = -1, dbm_cur, dbm_cnt;
1182 struct nl80211_msg_conveyor *req;
1183 struct iwinfo_txpwrlist_entry entry;
1185 if (nl80211_get_channel(ifname, &ch_cur))
1188 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1191 /* initialize the value pointer with channel for callback */
1194 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1200 for (dbm_cur = 0, dbm_cnt = 0;
1202 dbm_cur++, dbm_cnt++)
1204 entry.dbm = dbm_cur;
1205 entry.mw = iwinfo_dbm2mw(dbm_cur);
1207 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1210 entry.dbm = dbm_max;
1211 entry.mw = iwinfo_dbm2mw(dbm_max);
1213 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1216 *len = dbm_cnt * sizeof(entry);
1223 static void nl80211_get_scancrypto(const char *spec,
1224 struct iwinfo_crypto_entry *c)
1226 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1230 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1233 else if (strstr(spec, "WPA2"))
1236 else if (strstr(spec, "WPA"))
1239 else if (strstr(spec, "WEP"))
1240 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1243 if (strstr(spec, "PSK"))
1244 c->auth_suites |= IWINFO_KMGMT_PSK;
1246 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1247 c->auth_suites |= IWINFO_KMGMT_8021x;
1249 if (strstr(spec, "WPA-NONE"))
1250 c->auth_suites |= IWINFO_KMGMT_NONE;
1253 if (strstr(spec, "TKIP"))
1254 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1256 if (strstr(spec, "CCMP"))
1257 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1259 if (strstr(spec, "WEP-40"))
1260 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1262 if (strstr(spec, "WEP-104"))
1263 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1265 c->group_ciphers = c->pair_ciphers;
1273 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1275 int freq, rssi, qmax, count;
1277 char ssid[128] = { 0 };
1278 char bssid[18] = { 0 };
1279 char cipher[256] = { 0 };
1281 /* Got a radioX pseudo interface, find some interface on it or create one */
1282 if (!strncmp(ifname, "radio", 5))
1284 /* Reuse existing interface */
1285 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1287 return nl80211_get_scanlist(res, buf, len);
1290 /* Need to spawn a temporary iface for scanning */
1291 else if ((res = nl80211_ifadd(ifname)) != NULL)
1293 count = nl80211_get_scanlist(res, buf, len);
1299 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1301 /* WPA supplicant */
1302 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1304 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1306 nl80211_get_quality_max(ifname, &qmax);
1308 /* skip header line */
1309 while( *res++ != '\n' );
1313 while( sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1314 bssid, &freq, &rssi, cipher, ssid) > 0 )
1317 e->mac[0] = strtol(&bssid[0], NULL, 16);
1318 e->mac[1] = strtol(&bssid[3], NULL, 16);
1319 e->mac[2] = strtol(&bssid[6], NULL, 16);
1320 e->mac[3] = strtol(&bssid[9], NULL, 16);
1321 e->mac[4] = strtol(&bssid[12], NULL, 16);
1322 e->mac[5] = strtol(&bssid[15], NULL, 16);
1325 memcpy(e->ssid, ssid,
1326 min(strlen(ssid), sizeof(e->ssid) - 1));
1328 /* Mode (assume master) */
1329 sprintf((char *)e->mode, "Master");
1332 e->channel = nl80211_freq2channel(freq);
1340 /* The cfg80211 wext compat layer assumes a signal range
1341 * of -110 dBm to -40 dBm, the quality value is derived
1342 * by adding 110 to the signal level */
1345 else if (rssi > -40)
1348 e->quality = (rssi + 110);
1356 e->quality_max = qmax;
1359 nl80211_get_scancrypto(cipher, &e->crypto);
1361 /* advance to next line */
1362 while( *res && *res++ != '\n' );
1367 memset(ssid, 0, sizeof(ssid));
1368 memset(bssid, 0, sizeof(bssid));
1369 memset(cipher, 0, sizeof(cipher));
1372 *len = count * sizeof(struct iwinfo_scanlist_entry);
1380 /* Got a temp interface, don't create yet another one */
1381 if (!strncmp(ifname, "tmp.", 4))
1383 if (!iwinfo_ifup(ifname))
1386 wext_get_scanlist(ifname, buf, len);
1387 iwinfo_ifdown(ifname);
1391 /* Spawn a new scan interface */
1394 if (!(res = nl80211_ifadd(ifname)))
1397 if (!iwinfo_ifmac(res))
1400 /* if we can take the new interface up, the driver supports an
1401 * additional interface and there's no need to tear down the ap */
1402 if (iwinfo_ifup(res))
1404 wext_get_scanlist(res, buf, len);
1408 /* driver cannot create secondary interface, take down ap
1410 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1412 wext_get_scanlist(res, buf, len);
1414 iwinfo_ifup(ifname);
1415 nl80211_hostapd_hup(ifname);
1427 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
1429 int bands_remain, freqs_remain;
1431 struct nl80211_array_buf *arr = arg;
1432 struct iwinfo_freqlist_entry *e = arr->buf;
1434 struct nlattr **attr = nl80211_parse(msg);
1435 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1436 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1437 struct nlattr *band, *freq;
1439 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1440 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1441 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1442 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1443 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1444 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1445 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1448 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1450 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1451 nla_len(band), NULL);
1453 nla_for_each_nested(freq,
1454 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1456 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1457 nla_data(freq), nla_len(freq), NULL);
1459 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1460 freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1463 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1464 e->channel = nl80211_freq2channel(e->mhz);
1467 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1468 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
1469 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1480 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1482 struct nl80211_msg_conveyor *req;
1483 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1485 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1488 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
1494 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
1501 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
1504 struct nlattr **attr = nl80211_parse(msg);
1506 if (attr[NL80211_ATTR_REG_ALPHA2])
1507 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
1514 int nl80211_get_country(const char *ifname, char *buf)
1517 struct nl80211_msg_conveyor *req;
1519 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1522 nl80211_send(req, nl80211_get_country_cb, buf);
1532 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1535 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1536 const struct iwinfo_iso3166_label *l;
1538 for( l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++ )
1540 e->iso3166 = l->iso3166;
1541 e->ccode[0] = (l->iso3166 / 256);
1542 e->ccode[1] = (l->iso3166 % 256);
1545 *len = (count * sizeof(struct iwinfo_country_entry));
1549 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
1552 int bands_remain, freqs_remain;
1554 struct nlattr **attr = nl80211_parse(msg);
1555 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1556 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1557 struct nlattr *band, *freq;
1561 if (attr[NL80211_ATTR_WIPHY_BANDS])
1563 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1565 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1566 nla_len(band), NULL);
1568 if (bands[NL80211_BAND_ATTR_HT_CAPA])
1569 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1571 /* Treat any nonzero capability as 11n */
1573 *modes |= IWINFO_80211_N;
1575 nla_for_each_nested(freq,
1576 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1578 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1579 nla_data(freq), nla_len(freq), NULL);
1581 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
1584 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
1586 *modes |= IWINFO_80211_B;
1587 *modes |= IWINFO_80211_G;
1591 *modes |= IWINFO_80211_A;
1600 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1602 struct nl80211_msg_conveyor *req;
1604 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1607 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
1611 return *buf ? 0 : -1;
1614 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1616 /* Test whether we can create another interface */
1617 char *nif = nl80211_ifadd(ifname);
1621 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));