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))
392 send(sock, "ATTACH", 6, 0);
394 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
399 send(sock, cmd, strlen(cmd), 0);
401 while( numtry++ < 5 )
403 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
411 if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
420 if (local.sun_family)
421 unlink(local.sun_path);
426 static inline int nl80211_readint(const char *path)
432 if ((fd = open(path, O_RDONLY)) > -1)
434 if (read(fd, buffer, sizeof(buffer)) > 0)
443 static char * nl80211_phy2ifname(const char *ifname)
445 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
447 static char nif[IFNAMSIZ] = { 0 };
454 else if (!strncmp(ifname, "phy", 3))
455 phyidx = atoi(&ifname[3]);
456 else if (!strncmp(ifname, "radio", 5))
457 phyidx = atoi(&ifname[5]);
459 memset(nif, 0, sizeof(nif));
463 if ((d = opendir("/sys/class/net")) != NULL)
465 while( (e = readdir(d)) != NULL )
467 snprintf(buffer, sizeof(buffer),
468 "/sys/class/net/%s/phy80211/index", e->d_name);
470 if (nl80211_readint(buffer) == phyidx)
472 snprintf(buffer, sizeof(buffer),
473 "/sys/class/net/%s/ifindex", e->d_name);
475 if( (cifidx = nl80211_readint(buffer)) >= 0 &&
476 ((ifidx < 0) || (cifidx < ifidx)) )
479 strncpy(nif, e->d_name, sizeof(nif));
488 return nif[0] ? nif : NULL;
491 static char * nl80211_ifadd(const char *ifname)
495 static char nif[IFNAMSIZ] = { 0 };
496 struct nl80211_msg_conveyor *req, *res;
498 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
501 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
503 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
504 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
506 nl80211_send(req, NULL, NULL);
517 static void nl80211_ifdel(const char *ifname)
519 struct nl80211_msg_conveyor *req;
521 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
524 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
526 nl80211_send(req, NULL, NULL);
533 static void nl80211_hostapd_hup(const char *ifname)
537 char *phy = nl80211_ifname2phy(ifname);
541 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
542 if ((fd = open(buf, O_RDONLY)) > 0)
544 if (read(fd, buf, sizeof(buf)) > 0)
556 int nl80211_probe(const char *ifname)
558 return !!nl80211_ifname2phy(ifname);
561 void nl80211_close(void)
566 genl_family_put(nls->nl80211);
569 nl_socket_free(nls->nl_sock);
572 nl_cache_free(nls->nl_cache);
579 int nl80211_get_mode(const char *ifname, char *buf)
581 return wext_get_mode(ifname, buf);
584 int nl80211_get_ssid(const char *ifname, char *buf)
588 if (!wext_get_ssid(ifname, buf))
592 else if( (ssid = nl80211_hostapd_info(ifname)) &&
593 (ssid = nl80211_getval(ifname, ssid, "ssid")) )
595 memcpy(buf, ssid, strlen(ssid));
602 int nl80211_get_bssid(const char *ifname, char *buf)
605 unsigned char mac[6];
607 if (!wext_get_bssid(ifname, buf))
611 else if((bssid = nl80211_hostapd_info(ifname)) &&
612 (bssid = nl80211_getval(ifname, bssid, "bssid")))
614 mac[0] = strtol(&bssid[0], NULL, 16);
615 mac[1] = strtol(&bssid[3], NULL, 16);
616 mac[2] = strtol(&bssid[6], NULL, 16);
617 mac[3] = strtol(&bssid[9], NULL, 16);
618 mac[4] = strtol(&bssid[12], NULL, 16);
619 mac[5] = strtol(&bssid[15], NULL, 16);
621 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
622 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
630 int nl80211_get_channel(const char *ifname, int *buf)
634 if (!wext_get_channel(ifname, buf))
637 else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
638 return wext_get_channel(first, buf);
643 int nl80211_get_frequency(const char *ifname, int *buf)
647 if (!wext_get_frequency(ifname, buf))
650 else if ((first = nl80211_phy2ifname(nl80211_ifname2phy(ifname))) != NULL)
651 return wext_get_frequency(first, buf);
656 int nl80211_get_txpower(const char *ifname, int *buf)
658 return wext_get_txpower(ifname, buf);
662 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
666 struct nl80211_rssi_rate *rr = arg;
667 struct nlattr **attr = nl80211_parse(msg);
668 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
669 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
671 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
672 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
673 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
674 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
675 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
676 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
677 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
678 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
679 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
680 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
681 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
684 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
685 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
686 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
687 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
688 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
691 if (attr[NL80211_ATTR_STA_INFO])
693 if( !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
694 attr[NL80211_ATTR_STA_INFO], stats_policy) )
696 if (sinfo[NL80211_STA_INFO_SIGNAL])
698 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
699 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
702 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
704 if( !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
705 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy) )
707 if (rinfo[NL80211_RATE_INFO_BITRATE])
709 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
711 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
721 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
725 struct nl80211_msg_conveyor *req;
730 if ((d = opendir("/sys/class/net")) != NULL)
732 while ((de = readdir(d)) != NULL)
734 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
735 (!de->d_name[strlen(ifname)] ||
736 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
738 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
743 nl80211_send(req, nl80211_fill_signal_cb, r);
753 int nl80211_get_bitrate(const char *ifname, int *buf)
755 struct nl80211_rssi_rate rr;
757 if (!wext_get_bitrate(ifname, buf))
760 nl80211_fill_signal(ifname, &rr);
764 *buf = (rr.rate * 100);
771 int nl80211_get_signal(const char *ifname, int *buf)
773 struct nl80211_rssi_rate rr;
775 if (!wext_get_signal(ifname, buf))
778 nl80211_fill_signal(ifname, &rr);
789 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
792 struct nlattr **tb = nl80211_parse(msg);
793 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
795 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
796 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
797 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
800 if (!tb[NL80211_ATTR_SURVEY_INFO])
803 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
804 tb[NL80211_ATTR_SURVEY_INFO], sp))
807 if (!si[NL80211_SURVEY_INFO_NOISE])
810 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
811 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
817 int nl80211_get_noise(const char *ifname, int *buf)
820 struct nl80211_msg_conveyor *req;
822 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
827 nl80211_send(req, nl80211_get_noise_cb, &noise);
840 int nl80211_get_quality(const char *ifname, int *buf)
844 if (wext_get_quality(ifname, buf))
848 if (!nl80211_get_signal(ifname, &signal))
850 /* A positive signal level is usually just a quality
851 * value, pass through as-is */
857 /* The cfg80211 wext compat layer assumes a signal range
858 * of -110 dBm to -40 dBm, the quality value is derived
859 * by adding 110 to the signal level */
864 else if (signal > -40)
867 *buf = (signal + 110);
875 int nl80211_get_quality_max(const char *ifname, int *buf)
877 if (wext_get_quality_max(ifname, buf))
878 /* The cfg80211 wext compat layer assumes a maximum
885 int nl80211_get_encryption(const char *ifname, char *buf)
890 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
893 if( (res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
894 (val = nl80211_getval(NULL, res, "pairwise_cipher")) )
897 if (strstr(val, "WEP"))
899 if (strstr(val, "WEP-40"))
900 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
902 else if (strstr(val, "WEP-104"))
903 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
906 c->group_ciphers = c->pair_ciphers;
908 c->auth_suites |= IWINFO_KMGMT_NONE;
909 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
915 if (strstr(val, "TKIP"))
916 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
918 else if (strstr(val, "CCMP"))
919 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
921 else if (strstr(val, "NONE"))
922 c->pair_ciphers |= IWINFO_CIPHER_NONE;
924 else if (strstr(val, "WEP-40"))
925 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
927 else if (strstr(val, "WEP-104"))
928 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
931 if ((val = nl80211_getval(NULL, res, "group_cipher")))
933 if (strstr(val, "TKIP"))
934 c->group_ciphers |= IWINFO_CIPHER_TKIP;
936 else if (strstr(val, "CCMP"))
937 c->group_ciphers |= IWINFO_CIPHER_CCMP;
939 else if (strstr(val, "NONE"))
940 c->group_ciphers |= IWINFO_CIPHER_NONE;
942 else if (strstr(val, "WEP-40"))
943 c->group_ciphers |= IWINFO_CIPHER_WEP40;
945 else if (strstr(val, "WEP-104"))
946 c->group_ciphers |= IWINFO_CIPHER_WEP104;
950 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
952 if (strstr(val, "WPA2"))
955 else if (strstr(val, "WPA"))
959 if (strstr(val, "PSK"))
960 c->auth_suites |= IWINFO_KMGMT_PSK;
962 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
963 c->auth_suites |= IWINFO_KMGMT_8021x;
965 else if (strstr(val, "NONE"))
966 c->auth_suites |= IWINFO_KMGMT_NONE;
969 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
976 else if ((res = nl80211_hostapd_info(ifname)))
978 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
979 c->wpa_version = atoi(val);
981 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
983 if (!val || strstr(val, "PSK"))
984 c->auth_suites |= IWINFO_KMGMT_PSK;
986 if (val && strstr(val, "EAP"))
987 c->auth_suites |= IWINFO_KMGMT_8021x;
989 if (val && strstr(val, "NONE"))
990 c->auth_suites |= IWINFO_KMGMT_NONE;
992 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
994 if (strstr(val, "TKIP"))
995 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
997 if (strstr(val, "CCMP"))
998 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1000 if (strstr(val, "NONE"))
1001 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1004 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1008 c->auth_algs |= IWINFO_AUTH_OPEN;
1012 c->auth_algs |= IWINFO_AUTH_SHARED;
1016 c->auth_algs |= IWINFO_AUTH_OPEN;
1017 c->auth_algs |= IWINFO_AUTH_SHARED;
1024 for( i = 0; i < 4; i++ )
1026 snprintf(k, sizeof(k), "wep_key%d", i);
1028 if ((val = nl80211_getval(ifname, res, k)))
1030 if ((strlen(val) == 5) || (strlen(val) == 10))
1031 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1033 else if ((strlen(val) == 13) || (strlen(val) == 26))
1034 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1039 c->group_ciphers = c->pair_ciphers;
1040 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1049 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1051 struct nl80211_array_buf *arr = arg;
1052 struct iwinfo_assoclist_entry *e = arr->buf;
1053 struct nlattr **attr = nl80211_parse(msg);
1054 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1055 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1057 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1058 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1059 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1060 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1061 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1062 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1063 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1066 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1067 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1068 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1069 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1070 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1073 /* advance to end of array */
1075 memset(e, 0, sizeof(*e));
1077 if (attr[NL80211_ATTR_MAC])
1078 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1080 if (attr[NL80211_ATTR_STA_INFO] &&
1081 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1082 attr[NL80211_ATTR_STA_INFO], stats_policy))
1084 if (sinfo[NL80211_STA_INFO_SIGNAL])
1085 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1087 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1088 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1090 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1091 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1093 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1094 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1096 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1097 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1098 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1100 if (rinfo[NL80211_RATE_INFO_BITRATE])
1102 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1104 if (rinfo[NL80211_RATE_INFO_MCS])
1105 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1107 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1108 e->rx_rate.is_40mhz = 1;
1110 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1111 e->rx_rate.is_short_gi = 1;
1114 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1115 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1116 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1118 if (rinfo[NL80211_RATE_INFO_BITRATE])
1120 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1122 if (rinfo[NL80211_RATE_INFO_MCS])
1123 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1125 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1126 e->tx_rate.is_40mhz = 1;
1128 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1129 e->tx_rate.is_short_gi = 1;
1133 e->noise = 0; /* filled in by caller */
1139 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1144 struct nl80211_msg_conveyor *req;
1145 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1146 struct iwinfo_assoclist_entry *e;
1148 if ((d = opendir("/sys/class/net")) != NULL)
1150 while ((de = readdir(d)) != NULL)
1152 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1153 (!de->d_name[strlen(ifname)] ||
1154 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1156 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1161 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1169 if (!nl80211_get_noise(ifname, &noise))
1170 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1173 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1180 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1183 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1185 struct nlattr **attr = nl80211_parse(msg);
1186 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1187 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1188 struct nlattr *band, *freq;
1190 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1191 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1192 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1193 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1194 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1195 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1196 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1199 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1202 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1204 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1205 nla_len(band), NULL);
1207 nla_for_each_nested(freq,
1208 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1210 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1211 nla_data(freq), nla_len(freq), freq_policy);
1213 ch_cmp = nl80211_freq2channel(
1214 nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1216 if( (!ch_cur || (ch_cmp == ch_cur)) &&
1217 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] )
1219 *dbm_max = (int)(0.01 * nla_get_u32(
1220 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1230 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1233 int dbm_max = -1, dbm_cur, dbm_cnt;
1234 struct nl80211_msg_conveyor *req;
1235 struct iwinfo_txpwrlist_entry entry;
1237 if (nl80211_get_channel(ifname, &ch_cur))
1240 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1243 /* initialize the value pointer with channel for callback */
1246 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1252 for (dbm_cur = 0, dbm_cnt = 0;
1254 dbm_cur++, dbm_cnt++)
1256 entry.dbm = dbm_cur;
1257 entry.mw = iwinfo_dbm2mw(dbm_cur);
1259 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1262 entry.dbm = dbm_max;
1263 entry.mw = iwinfo_dbm2mw(dbm_max);
1265 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1268 *len = dbm_cnt * sizeof(entry);
1275 static void nl80211_get_scancrypto(const char *spec,
1276 struct iwinfo_crypto_entry *c)
1278 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1282 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1285 else if (strstr(spec, "WPA2"))
1288 else if (strstr(spec, "WPA"))
1291 else if (strstr(spec, "WEP"))
1292 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1295 if (strstr(spec, "PSK"))
1296 c->auth_suites |= IWINFO_KMGMT_PSK;
1298 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1299 c->auth_suites |= IWINFO_KMGMT_8021x;
1301 if (strstr(spec, "WPA-NONE"))
1302 c->auth_suites |= IWINFO_KMGMT_NONE;
1305 if (strstr(spec, "TKIP"))
1306 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1308 if (strstr(spec, "CCMP"))
1309 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1311 if (strstr(spec, "WEP-40"))
1312 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1314 if (strstr(spec, "WEP-104"))
1315 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1317 c->group_ciphers = c->pair_ciphers;
1325 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1327 int freq, rssi, qmax, count;
1329 char ssid[128] = { 0 };
1330 char bssid[18] = { 0 };
1331 char cipher[256] = { 0 };
1333 /* Got a radioX pseudo interface, find some interface on it or create one */
1334 if (!strncmp(ifname, "radio", 5))
1336 /* Reuse existing interface */
1337 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1339 return nl80211_get_scanlist(res, buf, len);
1342 /* Need to spawn a temporary iface for scanning */
1343 else if ((res = nl80211_ifadd(ifname)) != NULL)
1345 count = nl80211_get_scanlist(res, buf, len);
1351 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1353 /* WPA supplicant */
1354 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1356 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1358 nl80211_get_quality_max(ifname, &qmax);
1360 /* skip header line */
1361 while( *res++ != '\n' );
1365 while( sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1366 bssid, &freq, &rssi, cipher, ssid) > 0 )
1369 e->mac[0] = strtol(&bssid[0], NULL, 16);
1370 e->mac[1] = strtol(&bssid[3], NULL, 16);
1371 e->mac[2] = strtol(&bssid[6], NULL, 16);
1372 e->mac[3] = strtol(&bssid[9], NULL, 16);
1373 e->mac[4] = strtol(&bssid[12], NULL, 16);
1374 e->mac[5] = strtol(&bssid[15], NULL, 16);
1377 memcpy(e->ssid, ssid,
1378 min(strlen(ssid), sizeof(e->ssid) - 1));
1380 /* Mode (assume master) */
1381 sprintf((char *)e->mode, "Master");
1384 e->channel = nl80211_freq2channel(freq);
1392 /* The cfg80211 wext compat layer assumes a signal range
1393 * of -110 dBm to -40 dBm, the quality value is derived
1394 * by adding 110 to the signal level */
1397 else if (rssi > -40)
1400 e->quality = (rssi + 110);
1408 e->quality_max = qmax;
1411 nl80211_get_scancrypto(cipher, &e->crypto);
1413 /* advance to next line */
1414 while( *res && *res++ != '\n' );
1419 memset(ssid, 0, sizeof(ssid));
1420 memset(bssid, 0, sizeof(bssid));
1421 memset(cipher, 0, sizeof(cipher));
1424 *len = count * sizeof(struct iwinfo_scanlist_entry);
1432 /* Got a temp interface, don't create yet another one */
1433 if (!strncmp(ifname, "tmp.", 4))
1435 if (!iwinfo_ifup(ifname))
1438 wext_get_scanlist(ifname, buf, len);
1439 iwinfo_ifdown(ifname);
1443 /* Spawn a new scan interface */
1446 if (!(res = nl80211_ifadd(ifname)))
1449 if (!iwinfo_ifmac(res))
1452 /* if we can take the new interface up, the driver supports an
1453 * additional interface and there's no need to tear down the ap */
1454 if (iwinfo_ifup(res))
1456 wext_get_scanlist(res, buf, len);
1460 /* driver cannot create secondary interface, take down ap
1462 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1464 wext_get_scanlist(res, buf, len);
1466 iwinfo_ifup(ifname);
1467 nl80211_hostapd_hup(ifname);
1479 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
1481 int bands_remain, freqs_remain;
1483 struct nl80211_array_buf *arr = arg;
1484 struct iwinfo_freqlist_entry *e = arr->buf;
1486 struct nlattr **attr = nl80211_parse(msg);
1487 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1488 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1489 struct nlattr *band, *freq;
1491 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1492 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1493 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1494 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1495 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1496 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1497 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1500 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1502 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1503 nla_len(band), NULL);
1505 nla_for_each_nested(freq,
1506 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1508 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1509 nla_data(freq), nla_len(freq), NULL);
1511 if( !freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1512 freqs[NL80211_FREQUENCY_ATTR_DISABLED] )
1515 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
1516 e->channel = nl80211_freq2channel(e->mhz);
1519 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
1520 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
1521 freqs[NL80211_FREQUENCY_ATTR_RADAR]
1532 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
1534 struct nl80211_msg_conveyor *req;
1535 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1537 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1540 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
1546 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
1553 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
1556 struct nlattr **attr = nl80211_parse(msg);
1558 if (attr[NL80211_ATTR_REG_ALPHA2])
1559 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
1566 int nl80211_get_country(const char *ifname, char *buf)
1569 struct nl80211_msg_conveyor *req;
1571 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
1574 nl80211_send(req, nl80211_get_country_cb, buf);
1584 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
1587 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
1588 const struct iwinfo_iso3166_label *l;
1590 for( l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++ )
1592 e->iso3166 = l->iso3166;
1593 e->ccode[0] = (l->iso3166 / 256);
1594 e->ccode[1] = (l->iso3166 % 256);
1597 *len = (count * sizeof(struct iwinfo_country_entry));
1601 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
1604 int bands_remain, freqs_remain;
1606 struct nlattr **attr = nl80211_parse(msg);
1607 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1608 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1609 struct nlattr *band, *freq;
1613 if (attr[NL80211_ATTR_WIPHY_BANDS])
1615 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1617 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1618 nla_len(band), NULL);
1620 if (bands[NL80211_BAND_ATTR_HT_CAPA])
1621 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
1623 /* Treat any nonzero capability as 11n */
1625 *modes |= IWINFO_80211_N;
1627 nla_for_each_nested(freq,
1628 bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1630 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1631 nla_data(freq), nla_len(freq), NULL);
1633 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
1636 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
1638 *modes |= IWINFO_80211_B;
1639 *modes |= IWINFO_80211_G;
1643 *modes |= IWINFO_80211_A;
1652 int nl80211_get_hwmodelist(const char *ifname, int *buf)
1654 struct nl80211_msg_conveyor *req;
1656 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1659 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
1663 return *buf ? 0 : -1;
1666 int nl80211_get_mbssid_support(const char *ifname, int *buf)
1668 /* Test whether we can create another interface */
1669 char *nif = nl80211_ifadd(ifname);
1673 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
1684 int nl80211_get_hardware_id(const char *ifname, char *buf)
1689 /* Got a radioX pseudo interface, find some interface on it or create one */
1690 if (!strncmp(ifname, "radio", 5))
1692 /* Reuse existing interface */
1693 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1695 rv = wext_get_hardware_id(res, buf);
1698 /* Need to spawn a temporary iface for finding IDs */
1699 else if ((res = nl80211_ifadd(ifname)) != NULL)
1701 rv = wext_get_hardware_id(res, buf);
1707 rv = wext_get_hardware_id(ifname, buf);
1710 /* Failed to obtain hardware IDs, search board config */
1713 rv = iwinfo_hardware_id_from_mtd(buf);
1719 static const struct iwinfo_hardware_entry *
1720 nl80211_get_hardware_entry(const char *ifname)
1722 struct iwinfo_hardware_id id;
1724 if (nl80211_get_hardware_id(ifname, (char *)&id))
1727 return iwinfo_hardware(&id);
1730 int nl80211_get_hardware_name(const char *ifname, char *buf)
1732 const struct iwinfo_hardware_entry *hw;
1734 if (!(hw = nl80211_get_hardware_entry(ifname)))
1735 sprintf(buf, "Generic MAC80211");
1737 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
1742 int nl80211_get_txpower_offset(const char *ifname, int *buf)
1744 const struct iwinfo_hardware_entry *hw;
1746 if (!(hw = nl80211_get_hardware_entry(ifname)))
1749 *buf = hw->txpower_offset;
1753 int nl80211_get_frequency_offset(const char *ifname, int *buf)
1755 const struct iwinfo_hardware_entry *hw;
1757 if (!(hw = nl80211_get_hardware_entry(ifname)))
1760 *buf = hw->frequency_offset;