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,
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]);
459 if( (d = opendir("/sys/class/net")) != NULL )
461 while( (e = readdir(d)) != NULL )
463 snprintf(buffer, sizeof(buffer),
464 "/sys/class/net/%s/phy80211/index", e->d_name);
466 if( nl80211_readint(buffer) == phyidx )
468 snprintf(buffer, sizeof(buffer),
469 "/sys/class/net/%s/ifindex", e->d_name);
471 if( (cifidx = nl80211_readint(buffer)) >= 0 &&
472 ((ifidx < 0) || (cifidx < ifidx)) )
475 strncpy(nif, e->d_name, sizeof(nif));
484 return nif[0] ? nif : NULL;
487 static char * nl80211_ifadd(const char *ifname)
491 static char nif[IFNAMSIZ] = { 0 };
492 struct nl80211_msg_conveyor *req, *res;
494 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
497 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
499 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
500 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
502 res = nl80211_send(req);
516 static void nl80211_ifdel(const char *ifname)
518 struct nl80211_msg_conveyor *req;
520 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
523 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
525 nl80211_free(nl80211_send(req));
532 static void nl80211_hostapd_hup(const char *ifname)
536 char *phy = nl80211_ifname2phy(ifname);
540 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
541 if( (fd = open(buf, O_RDONLY)) > 0 )
543 if( read(fd, buf, sizeof(buf)) > 0 )
555 int nl80211_probe(const char *ifname)
557 return !!nl80211_ifname2phy(ifname);
560 void nl80211_close(void)
565 nl_socket_free(nls->nl_sock);
568 nl_cache_free(nls->nl_cache);
575 int nl80211_get_mode(const char *ifname, char *buf)
577 return wext_get_mode(ifname, buf);
580 int nl80211_get_ssid(const char *ifname, char *buf)
584 if( !wext_get_ssid(ifname, buf) )
588 else if( (ssid = nl80211_hostapd_info(ifname)) &&
589 (ssid = nl80211_getval(ifname, ssid, "ssid")) )
591 memcpy(buf, ssid, strlen(ssid));
598 int nl80211_get_bssid(const char *ifname, char *buf)
601 unsigned char mac[6];
603 if( !wext_get_bssid(ifname, buf) )
607 else if( (bssid = nl80211_hostapd_info(ifname)) &&
608 (bssid = nl80211_getval(ifname, bssid, "bssid")) )
610 mac[0] = strtol(&bssid[0], NULL, 16);
611 mac[1] = strtol(&bssid[3], NULL, 16);
612 mac[2] = strtol(&bssid[6], NULL, 16);
613 mac[3] = strtol(&bssid[9], NULL, 16);
614 mac[4] = strtol(&bssid[12], NULL, 16);
615 mac[5] = strtol(&bssid[15], NULL, 16);
617 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
618 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
626 int nl80211_get_channel(const char *ifname, int *buf)
630 if( !wext_get_channel(ifname, buf) )
633 else if( (first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL )
634 return wext_get_channel(first, buf);
639 int nl80211_get_frequency(const char *ifname, int *buf)
643 if( !wext_get_frequency(ifname, buf) )
646 else if( (first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL )
647 return wext_get_frequency(first, buf);
652 int nl80211_get_txpower(const char *ifname, int *buf)
654 return wext_get_txpower(ifname, buf);
658 static int nl80211_get_signal_cb(struct nl_msg *msg, void *arg)
662 struct nl80211_rssi_rate *rr = arg;
664 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
665 struct nlattr *attr[NL80211_ATTR_MAX + 1];
666 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
667 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
669 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
670 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
671 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
672 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
673 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
674 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
675 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
676 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
677 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
678 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
679 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
682 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
683 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
684 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
685 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
686 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
689 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
690 genlmsg_attrlen(gnlh, 0), NULL);
692 if( attr[NL80211_ATTR_STA_INFO] )
694 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
695 attr[NL80211_ATTR_STA_INFO], stats_policy) )
697 if( sinfo[NL80211_STA_INFO_SIGNAL] )
699 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
700 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
703 if( sinfo[NL80211_STA_INFO_TX_BITRATE] )
705 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
706 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
708 if( rinfo[NL80211_RATE_INFO_BITRATE] )
710 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
712 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
722 int nl80211_get_bitrate(const char *ifname, int *buf)
724 struct nl80211_rssi_rate rr;
725 struct nl80211_msg_conveyor *req;
727 if( !wext_get_bitrate(ifname, buf) )
730 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
736 nl80211_cb(req, nl80211_get_signal_cb, &rr);
742 *buf = (rr.rate * 100);
750 int nl80211_get_signal(const char *ifname, int *buf)
752 struct nl80211_rssi_rate rr;
753 struct nl80211_msg_conveyor *req;
755 if( !wext_get_signal(ifname, buf) )
758 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
764 nl80211_cb(req, nl80211_get_signal_cb, &rr);
778 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
781 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
782 struct nlattr *tb[NL80211_ATTR_MAX + 1];
783 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
785 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
786 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
787 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
790 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
791 genlmsg_attrlen(gnlh, 0), NULL);
793 if (!tb[NL80211_ATTR_SURVEY_INFO])
796 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
797 tb[NL80211_ATTR_SURVEY_INFO], sp))
800 if (!si[NL80211_SURVEY_INFO_NOISE])
803 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
804 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
810 int nl80211_get_noise(const char *ifname, int *buf)
813 struct nl80211_msg_conveyor *req;
815 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
820 nl80211_cb(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_hostapd_info(ifname)) )
889 if( (val = nl80211_getval(ifname, res, "wpa")) != NULL )
890 c->wpa_version = atoi(val);
892 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
894 if( !val || strstr(val, "PSK") )
895 c->auth_suites |= IWINFO_KMGMT_PSK;
897 if( val && strstr(val, "EAP") )
898 c->auth_suites |= IWINFO_KMGMT_8021x;
900 if( val && strstr(val, "NONE") )
901 c->auth_suites |= IWINFO_KMGMT_NONE;
903 if( (val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL )
905 if( strstr(val, "TKIP") )
906 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
908 if( strstr(val, "CCMP") )
909 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
911 if( strstr(val, "NONE") )
912 c->pair_ciphers |= IWINFO_CIPHER_NONE;
915 if( (val = nl80211_getval(ifname, res, "auth_algs")) != NULL )
919 c->auth_algs |= IWINFO_AUTH_OPEN;
923 c->auth_algs |= IWINFO_AUTH_SHARED;
927 c->auth_algs |= IWINFO_AUTH_OPEN;
928 c->auth_algs |= IWINFO_AUTH_SHARED;
935 for( i = 0; i < 4; i++ )
937 snprintf(k, sizeof(k), "wep_key%d", i);
939 if( (val = nl80211_getval(ifname, res, k)) )
941 if( (strlen(val) == 5) || (strlen(val) == 10) )
942 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
944 else if( (strlen(val) == 13) || (strlen(val) == 26) )
945 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
950 c->group_ciphers = c->pair_ciphers;
951 c->enabled = (c->auth_algs || c->auth_suites) ? 1 : 0;
957 else if( (res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
958 (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
961 if( strstr(val, "WEP") )
963 if( strstr(val, "WEP-40") )
964 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
966 else if( strstr(val, "WEP-104") )
967 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
970 c->group_ciphers = c->pair_ciphers;
972 c->auth_suites |= IWINFO_KMGMT_NONE;
973 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
979 if( strstr(val, "TKIP") )
980 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
982 else if( strstr(val, "CCMP") )
983 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
985 else if( strstr(val, "NONE") )
986 c->pair_ciphers |= IWINFO_CIPHER_NONE;
988 else if( strstr(val, "WEP-40") )
989 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
991 else if( strstr(val, "WEP-104") )
992 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
995 if( (val = nl80211_getval(NULL, res, "group_cipher")) )
997 if( strstr(val, "TKIP") )
998 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1000 else if( strstr(val, "CCMP") )
1001 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1003 else if( strstr(val, "NONE") )
1004 c->group_ciphers |= IWINFO_CIPHER_NONE;
1006 else if( strstr(val, "WEP-40") )
1007 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1009 else if( strstr(val, "WEP-104") )
1010 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1014 if( (val = nl80211_getval(NULL, res, "key_mgmt")) )
1016 if( strstr(val, "WPA2") )
1019 else if( strstr(val, "WPA") )
1023 if( strstr(val, "PSK") )
1024 c->auth_suites |= IWINFO_KMGMT_PSK;
1026 else if( strstr(val, "EAP") || strstr(val, "802.1X") )
1027 c->auth_suites |= IWINFO_KMGMT_8021x;
1029 else if( strstr(val, "NONE") )
1030 c->auth_suites |= IWINFO_KMGMT_NONE;
1033 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1043 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1045 struct nl80211_assoc_count *ac = arg;
1046 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1047 struct nlattr *attr[NL80211_ATTR_MAX + 1];
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 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1064 genlmsg_attrlen(gnlh, 0), NULL);
1066 if( attr[NL80211_ATTR_MAC] )
1067 memcpy(ac->entry->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 ac->entry->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1079 ac->entry->noise = ac->noise;
1086 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1088 struct nl80211_assoc_count ac;
1089 struct nl80211_msg_conveyor *req;
1091 nl80211_get_noise(ifname, &ac.noise);
1093 req = nl80211_msg(ifname, NL80211_CMD_GET_STATION, NLM_F_DUMP);
1097 ac.entry = (struct iwinfo_assoclist_entry *)buf;
1099 nl80211_cb(req, nl80211_get_assoclist_cb, &ac);
1103 *len = (ac.count * sizeof(struct iwinfo_assoclist_entry));
1110 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1112 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1113 int dbm_max = -1, dbm_cur, dbm_cnt;
1114 struct nl80211_msg_conveyor *req, *res;
1115 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1116 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1117 struct nlattr *band, *freq;
1118 struct iwinfo_txpwrlist_entry entry;
1120 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1121 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1122 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1123 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1124 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1125 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1126 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1129 if( nl80211_get_channel(ifname, &ch_cur) )
1132 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1135 res = nl80211_send(req);
1138 nla_for_each_nested(band,
1139 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1141 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1142 nla_len(band), NULL);
1144 nla_for_each_nested(freq,
1145 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1147 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1148 nla_data(freq), nla_len(freq), freq_policy);
1150 ch_cmp = nl80211_freq2channel(
1151 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1153 if( (!ch_cur || (ch_cmp == ch_cur)) &&
1154 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1156 dbm_max = (int)(0.01 * nla_get_u32(
1157 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1171 for( dbm_cur = 0, dbm_cnt = 0;
1173 dbm_cur += 2, dbm_cnt++ )
1175 entry.dbm = dbm_cur;
1176 entry.mw = iwinfo_dbm2mw(dbm_cur);
1178 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1181 entry.dbm = dbm_max;
1182 entry.mw = iwinfo_dbm2mw(dbm_max);
1184 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1187 *len = dbm_cnt * sizeof(entry);
1194 static void nl80211_get_scancrypto(const char *spec,
1195 struct iwinfo_crypto_entry *c)
1197 if( strstr(spec, "WPA") || strstr(spec, "WEP") )
1201 if( strstr(spec, "WPA2-") && strstr(spec, "WPA-") )
1204 else if( strstr(spec, "WPA2") )
1207 else if( strstr(spec, "WPA") )
1210 else if( strstr(spec, "WEP") )
1211 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1214 if( strstr(spec, "PSK") )
1215 c->auth_suites |= IWINFO_KMGMT_PSK;
1217 if( strstr(spec, "802.1X") || strstr(spec, "EAP") )
1218 c->auth_suites |= IWINFO_KMGMT_8021x;
1220 if( strstr(spec, "WPA-NONE") )
1221 c->auth_suites |= IWINFO_KMGMT_NONE;
1224 if( strstr(spec, "TKIP") )
1225 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1227 if( strstr(spec, "CCMP") )
1228 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1230 if( strstr(spec, "WEP-40") )
1231 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1233 if( strstr(spec, "WEP-104") )
1234 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1236 c->group_ciphers = c->pair_ciphers;
1244 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1246 int freq, rssi, qmax, count;
1248 char ssid[128] = { 0 };
1249 char bssid[18] = { 0 };
1250 char cipher[256] = { 0 };
1252 /* Got a radioX pseudo interface, find some interface on it or create one */
1253 if( !strncmp(ifname, "radio", 5) )
1255 /* Reuse existing interface */
1256 if( (res = nl80211_phy2ifname(ifname)) != NULL )
1258 return nl80211_get_scanlist(res, buf, len);
1261 /* Need to spawn a temporary iface for scanning */
1262 else if( (res = nl80211_ifadd(ifname)) != NULL )
1264 count = nl80211_get_scanlist(res, buf, len);
1270 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1272 /* WPA supplicant */
1273 if( (res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")) )
1275 if( (res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)) )
1277 nl80211_get_quality_max(ifname, &qmax);
1279 /* skip header line */
1280 while( *res++ != '\n' );
1284 while( sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1285 bssid, &freq, &rssi, cipher, ssid) > 0 )
1288 e->mac[0] = strtol(&bssid[0], NULL, 16);
1289 e->mac[1] = strtol(&bssid[3], NULL, 16);
1290 e->mac[2] = strtol(&bssid[6], NULL, 16);
1291 e->mac[3] = strtol(&bssid[9], NULL, 16);
1292 e->mac[4] = strtol(&bssid[12], NULL, 16);
1293 e->mac[5] = strtol(&bssid[15], NULL, 16);
1296 memcpy(e->ssid, ssid,
1297 min(strlen(ssid), sizeof(e->ssid) - 1));
1299 /* Mode (assume master) */
1300 sprintf((char *)e->mode, "Master");
1303 e->channel = nl80211_freq2channel(freq);
1311 /* The cfg80211 wext compat layer assumes a signal range
1312 * of -110 dBm to -40 dBm, the quality value is derived
1313 * by adding 110 to the signal level */
1316 else if( rssi > -40 )
1319 e->quality = (rssi + 110);
1327 e->quality_max = qmax;
1330 nl80211_get_scancrypto(cipher, &e->crypto);
1332 /* advance to next line */
1333 while( *res && *res++ != '\n' );
1338 memset(ssid, 0, sizeof(ssid));
1339 memset(bssid, 0, sizeof(bssid));
1340 memset(cipher, 0, sizeof(cipher));
1343 *len = count * sizeof(struct iwinfo_scanlist_entry);
1351 /* Got a temp interface, don't create yet another one */
1352 if( !strncmp(ifname, "tmp.", 4) )
1354 if( !iwinfo_ifup(ifname) )
1357 wext_get_scanlist(ifname, buf, len);
1358 iwinfo_ifdown(ifname);
1362 /* Spawn a new scan interface */
1365 if( !(res = nl80211_ifadd(ifname)) )
1368 if( !iwinfo_ifmac(res) )
1371 /* if we can take the new interface up, the driver supports an
1372 * additional interface and there's no need to tear down the ap */
1373 if( iwinfo_ifup(res) )
1375 wext_get_scanlist(res, buf, len);
1379 /* driver cannot create secondary interface, take down ap
1381 else if( iwinfo_ifdown(ifname) && iwinfo_ifup(res) )
1383 wext_get_scanlist(res, buf, len);
1385 iwinfo_ifup(ifname);
1386 nl80211_hostapd_hup(ifname);
1398 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1400 int count = 0, bands_remain, freqs_remain;
1401 struct nl80211_msg_conveyor *req, *res;
1402 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1403 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1404 struct nlattr *band, *freq;
1405 struct iwinfo_freqlist_entry *e = (struct iwinfo_freqlist_entry *)buf;
1407 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1410 res = nl80211_send(req);
1413 nla_for_each_nested(band,
1414 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1416 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1417 nla_len(band), NULL);
1419 nla_for_each_nested(freq,
1420 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1422 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1423 nla_data(freq), nla_len(freq), NULL);
1425 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1426 freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1429 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1430 e->channel = nl80211_freq2channel(e->mhz);
1433 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1434 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
1435 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1449 *len = count * sizeof(struct iwinfo_freqlist_entry);
1456 int nl80211_get_country(const char *ifname, char *buf)
1459 struct nl80211_msg_conveyor *req, *res;
1461 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1464 res = nl80211_send(req);
1467 if( res->attr[NL80211_ATTR_REG_ALPHA2] )
1469 memcpy(buf, nla_data(res->attr[NL80211_ATTR_REG_ALPHA2]), 2);
1480 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1483 struct iwinfo_iso3166_label *l;
1484 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1486 for( l = ISO3166_Names, count = 0; l->iso3166; l++, e++, count++ )
1488 e->iso3166 = l->iso3166;
1489 e->ccode[0] = (l->iso3166 / 256);
1490 e->ccode[1] = (l->iso3166 % 256);
1493 *len = (count * sizeof(struct iwinfo_country_entry));
1497 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1499 int bands_remain, freqs_remain;
1500 struct nl80211_msg_conveyor *req, *res;
1501 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1502 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1503 struct nlattr *band, *freq;
1506 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1509 res = nl80211_send(req);
1512 nla_for_each_nested(band,
1513 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1515 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1516 nla_len(band), NULL);
1518 if( bands[NL80211_BAND_ATTR_HT_CAPA] )
1519 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1521 /* Treat any nonzero capability as 11n */
1523 *buf |= IWINFO_80211_N;
1525 nla_for_each_nested(freq,
1526 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1528 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1529 nla_data(freq), nla_len(freq), NULL);
1531 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] )
1534 if( nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485 )
1536 *buf |= IWINFO_80211_B;
1537 *buf |= IWINFO_80211_G;
1541 *buf |= IWINFO_80211_A;
1550 return *buf ? 0 : -1;
1553 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1555 /* Test whether we can create another interface */
1556 char *nif = nl80211_ifadd(ifname);
1560 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));