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_fill_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 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
726 struct nl80211_msg_conveyor *req;
731 if ((d = opendir("/sys/class/net")) != NULL)
733 while ((de = readdir(d)) != NULL)
735 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
736 (!de->d_name[strlen(ifname)] ||
737 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
739 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
744 nl80211_cb(req, nl80211_fill_signal_cb, r);
745 nl80211_free(nl80211_send(req));
755 int nl80211_get_bitrate(const char *ifname, int *buf)
757 struct nl80211_rssi_rate rr;
759 if( !wext_get_bitrate(ifname, buf) )
762 nl80211_fill_signal(ifname, &rr);
766 *buf = (rr.rate * 100);
773 int nl80211_get_signal(const char *ifname, int *buf)
775 struct nl80211_rssi_rate rr;
777 if( !wext_get_signal(ifname, buf) )
780 nl80211_fill_signal(ifname, &rr);
791 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
794 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
795 struct nlattr *tb[NL80211_ATTR_MAX + 1];
796 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
798 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
799 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
800 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
803 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
804 genlmsg_attrlen(gnlh, 0), NULL);
806 if (!tb[NL80211_ATTR_SURVEY_INFO])
809 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
810 tb[NL80211_ATTR_SURVEY_INFO], sp))
813 if (!si[NL80211_SURVEY_INFO_NOISE])
816 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
817 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
823 int nl80211_get_noise(const char *ifname, int *buf)
826 struct nl80211_msg_conveyor *req;
828 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
833 nl80211_cb(req, nl80211_get_noise_cb, &noise);
834 nl80211_free(nl80211_send(req));
847 int nl80211_get_quality(const char *ifname, int *buf)
851 if( wext_get_quality(ifname, buf) )
855 if( !nl80211_get_signal(ifname, &signal) )
857 /* A positive signal level is usually just a quality
858 * value, pass through as-is */
864 /* The cfg80211 wext compat layer assumes a signal range
865 * of -110 dBm to -40 dBm, the quality value is derived
866 * by adding 110 to the signal level */
871 else if( signal > -40 )
874 *buf = (signal + 110);
882 int nl80211_get_quality_max(const char *ifname, int *buf)
884 if( wext_get_quality_max(ifname, buf) )
885 /* The cfg80211 wext compat layer assumes a maximum
892 int nl80211_get_encryption(const char *ifname, char *buf)
897 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
900 if( (res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
901 (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
904 if( strstr(val, "WEP") )
906 if( strstr(val, "WEP-40") )
907 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
909 else if( strstr(val, "WEP-104") )
910 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
913 c->group_ciphers = c->pair_ciphers;
915 c->auth_suites |= IWINFO_KMGMT_NONE;
916 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
922 if( strstr(val, "TKIP") )
923 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
925 else if( strstr(val, "CCMP") )
926 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
928 else if( strstr(val, "NONE") )
929 c->pair_ciphers |= IWINFO_CIPHER_NONE;
931 else if( strstr(val, "WEP-40") )
932 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
934 else if( strstr(val, "WEP-104") )
935 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
938 if( (val = nl80211_getval(NULL, res, "group_cipher")) )
940 if( strstr(val, "TKIP") )
941 c->group_ciphers |= IWINFO_CIPHER_TKIP;
943 else if( strstr(val, "CCMP") )
944 c->group_ciphers |= IWINFO_CIPHER_CCMP;
946 else if( strstr(val, "NONE") )
947 c->group_ciphers |= IWINFO_CIPHER_NONE;
949 else if( strstr(val, "WEP-40") )
950 c->group_ciphers |= IWINFO_CIPHER_WEP40;
952 else if( strstr(val, "WEP-104") )
953 c->group_ciphers |= IWINFO_CIPHER_WEP104;
957 if( (val = nl80211_getval(NULL, res, "key_mgmt")) )
959 if( strstr(val, "WPA2") )
962 else if( strstr(val, "WPA") )
966 if( strstr(val, "PSK") )
967 c->auth_suites |= IWINFO_KMGMT_PSK;
969 else if( strstr(val, "EAP") || strstr(val, "802.1X") )
970 c->auth_suites |= IWINFO_KMGMT_8021x;
972 else if( strstr(val, "NONE") )
973 c->auth_suites |= IWINFO_KMGMT_NONE;
976 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
983 else if( (res = nl80211_hostapd_info(ifname)) )
985 if( (val = nl80211_getval(ifname, res, "wpa")) != NULL )
986 c->wpa_version = atoi(val);
988 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
990 if( !val || strstr(val, "PSK") )
991 c->auth_suites |= IWINFO_KMGMT_PSK;
993 if( val && strstr(val, "EAP") )
994 c->auth_suites |= IWINFO_KMGMT_8021x;
996 if( val && strstr(val, "NONE") )
997 c->auth_suites |= IWINFO_KMGMT_NONE;
999 if( (val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL )
1001 if( strstr(val, "TKIP") )
1002 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1004 if( strstr(val, "CCMP") )
1005 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1007 if( strstr(val, "NONE") )
1008 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1011 if( (val = nl80211_getval(ifname, res, "auth_algs")) != NULL )
1015 c->auth_algs |= IWINFO_AUTH_OPEN;
1019 c->auth_algs |= IWINFO_AUTH_SHARED;
1023 c->auth_algs |= IWINFO_AUTH_OPEN;
1024 c->auth_algs |= IWINFO_AUTH_SHARED;
1031 for( i = 0; i < 4; i++ )
1033 snprintf(k, sizeof(k), "wep_key%d", i);
1035 if( (val = nl80211_getval(ifname, res, k)) )
1037 if( (strlen(val) == 5) || (strlen(val) == 10) )
1038 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1040 else if( (strlen(val) == 13) || (strlen(val) == 26) )
1041 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1046 c->group_ciphers = c->pair_ciphers;
1047 c->enabled = (c->auth_algs || c->auth_suites) ? 1 : 0;
1056 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1058 struct nl80211_assoc_count *ac = arg;
1059 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1060 struct nlattr *attr[NL80211_ATTR_MAX + 1];
1061 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1063 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1064 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1065 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1066 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1067 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1068 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1069 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1070 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1071 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1072 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1073 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1076 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1077 genlmsg_attrlen(gnlh, 0), NULL);
1079 if( attr[NL80211_ATTR_MAC] )
1080 memcpy(ac->entry->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1082 if( attr[NL80211_ATTR_STA_INFO] )
1084 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1085 attr[NL80211_ATTR_STA_INFO], stats_policy) )
1087 if( sinfo[NL80211_STA_INFO_SIGNAL] )
1088 ac->entry->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1092 ac->entry->noise = ac->noise;
1099 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1103 struct nl80211_assoc_count ac;
1104 struct nl80211_msg_conveyor *req;
1106 if ((d = opendir("/sys/class/net")) != NULL)
1109 ac.entry = (struct iwinfo_assoclist_entry *)buf;
1111 nl80211_get_noise(ifname, &ac.noise);
1113 while ((de = readdir(d)) != NULL)
1115 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1116 (!de->d_name[strlen(ifname)] ||
1117 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1119 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1124 nl80211_cb(req, nl80211_get_assoclist_cb, &ac);
1125 nl80211_free(nl80211_send(req));
1133 *len = (ac.count * sizeof(struct iwinfo_assoclist_entry));
1140 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1142 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1143 int dbm_max = -1, dbm_cur, dbm_cnt;
1144 struct nl80211_msg_conveyor *req, *res;
1145 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1146 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1147 struct nlattr *band, *freq;
1148 struct iwinfo_txpwrlist_entry entry;
1150 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1151 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1152 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1153 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1154 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1155 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1156 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1159 if( nl80211_get_channel(ifname, &ch_cur) )
1162 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1165 res = nl80211_send(req);
1168 nla_for_each_nested(band,
1169 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1171 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1172 nla_len(band), NULL);
1174 nla_for_each_nested(freq,
1175 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1177 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1178 nla_data(freq), nla_len(freq), freq_policy);
1180 ch_cmp = nl80211_freq2channel(
1181 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1183 if( (!ch_cur || (ch_cmp == ch_cur)) &&
1184 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1186 dbm_max = (int)(0.01 * nla_get_u32(
1187 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
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 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1430 int count = 0, bands_remain, freqs_remain;
1431 struct nl80211_msg_conveyor *req, *res;
1432 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1433 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1434 struct nlattr *band, *freq;
1435 struct iwinfo_freqlist_entry *e = (struct iwinfo_freqlist_entry *)buf;
1437 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1440 res = nl80211_send(req);
1441 if( res && res->attr[NL80211_ATTR_WIPHY_BANDS] )
1443 nla_for_each_nested(band,
1444 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1446 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1447 nla_len(band), NULL);
1449 nla_for_each_nested(freq,
1450 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1452 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1453 nla_data(freq), nla_len(freq), NULL);
1455 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1456 freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1459 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1460 e->channel = nl80211_freq2channel(e->mhz);
1463 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1464 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
1465 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1479 *len = count * sizeof(struct iwinfo_freqlist_entry);
1486 int nl80211_get_country(const char *ifname, char *buf)
1489 struct nl80211_msg_conveyor *req, *res;
1491 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1494 res = nl80211_send(req);
1497 if( res->attr[NL80211_ATTR_REG_ALPHA2] )
1499 memcpy(buf, nla_data(res->attr[NL80211_ATTR_REG_ALPHA2]), 2);
1510 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1513 struct iwinfo_iso3166_label *l;
1514 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1516 for( l = ISO3166_Names, count = 0; l->iso3166; l++, e++, count++ )
1518 e->iso3166 = l->iso3166;
1519 e->ccode[0] = (l->iso3166 / 256);
1520 e->ccode[1] = (l->iso3166 % 256);
1523 *len = (count * sizeof(struct iwinfo_country_entry));
1527 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1529 int bands_remain, freqs_remain;
1530 struct nl80211_msg_conveyor *req, *res;
1531 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1532 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1533 struct nlattr *band, *freq;
1536 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1539 res = nl80211_send(req);
1540 if( res && res->attr[NL80211_ATTR_WIPHY_BANDS] )
1542 nla_for_each_nested(band,
1543 res->attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1545 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1546 nla_len(band), NULL);
1548 if( bands[NL80211_BAND_ATTR_HT_CAPA] )
1549 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1551 /* Treat any nonzero capability as 11n */
1553 *buf |= IWINFO_80211_N;
1555 nla_for_each_nested(freq,
1556 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1558 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1559 nla_data(freq), nla_len(freq), NULL);
1561 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] )
1564 if( nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485 )
1566 *buf |= IWINFO_80211_B;
1567 *buf |= IWINFO_80211_G;
1571 *buf |= IWINFO_80211_A;
1580 return *buf ? 0 : -1;
1583 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1585 /* Test whether we can create another interface */
1586 char *nif = nl80211_ifadd(ifname);
1590 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));