2 * iwinfo - Wireless Information Library - NL80211 Backend
4 * Copyright (C) 2010-2013 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 memset(nls, 0, sizeof(*nls));
46 nls->nl_sock = nl_socket_alloc();
52 if (genl_connect(nls->nl_sock)) {
57 fd = nl_socket_get_fd(nls->nl_sock);
58 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");
74 nls->nlctrl = genl_ctrl_search_by_name(nls->nl_cache, "nlctrl");
90 static int nl80211_msg_error(struct sockaddr_nl *nla,
91 struct nlmsgerr *err, void *arg)
98 static int nl80211_msg_finish(struct nl_msg *msg, void *arg)
105 static int nl80211_msg_ack(struct nl_msg *msg, void *arg)
112 static int nl80211_msg_response(struct nl_msg *msg, void *arg)
117 static void nl80211_free(struct nl80211_msg_conveyor *cv)
132 static struct nl80211_msg_conveyor * nl80211_new(struct genl_family *family,
135 static struct nl80211_msg_conveyor cv;
137 struct nl_msg *req = NULL;
138 struct nl_cb *cb = NULL;
144 cb = nl_cb_alloc(NL_CB_DEFAULT);
148 genlmsg_put(req, 0, 0, genl_family_get_id(family), 0, flags, cmd, 0);
166 static struct nl80211_msg_conveyor * nl80211_ctl(int cmd, int flags)
168 if (nl80211_init() < 0)
171 return nl80211_new(nls->nlctrl, cmd, flags);
174 static struct nl80211_msg_conveyor * nl80211_msg(const char *ifname,
177 int ifidx = -1, phyidx = -1;
178 struct nl80211_msg_conveyor *cv;
180 if (nl80211_init() < 0)
183 if (!strncmp(ifname, "phy", 3))
184 phyidx = atoi(&ifname[3]);
185 else if (!strncmp(ifname, "radio", 5))
186 phyidx = atoi(&ifname[5]);
187 else if (!strncmp(ifname, "mon.", 4))
188 ifidx = if_nametoindex(&ifname[4]);
190 ifidx = if_nametoindex(ifname);
192 if ((ifidx < 0) && (phyidx < 0))
195 cv = nl80211_new(nls->nl80211, cmd, flags);
200 NLA_PUT_U32(cv->msg, NL80211_ATTR_IFINDEX, ifidx);
203 NLA_PUT_U32(cv->msg, NL80211_ATTR_WIPHY, phyidx);
212 static struct nl80211_msg_conveyor * nl80211_send(
213 struct nl80211_msg_conveyor *cv,
214 int (*cb_func)(struct nl_msg *, void *), void *cb_arg
216 static struct nl80211_msg_conveyor rcv;
220 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, cb_func, cb_arg);
222 nl_cb_set(cv->cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_msg_response, &rcv);
224 if (nl_send_auto_complete(nls->nl_sock, cv->msg) < 0)
227 nl_cb_err(cv->cb, NL_CB_CUSTOM, nl80211_msg_error, &err);
228 nl_cb_set(cv->cb, NL_CB_FINISH, NL_CB_CUSTOM, nl80211_msg_finish, &err);
229 nl_cb_set(cv->cb, NL_CB_ACK, NL_CB_CUSTOM, nl80211_msg_ack, &err);
232 nl_recvmsgs(nls->nl_sock, cv->cb);
243 static struct nlattr ** nl80211_parse(struct nl_msg *msg)
245 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
246 static struct nlattr *attr[NL80211_ATTR_MAX + 1];
248 nla_parse(attr, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
249 genlmsg_attrlen(gnlh, 0), NULL);
255 static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
257 struct nl80211_group_conveyor *cv = arg;
259 struct nlattr **attr = nl80211_parse(msg);
260 struct nlattr *mgrpinfo[CTRL_ATTR_MCAST_GRP_MAX + 1];
264 if (!attr[CTRL_ATTR_MCAST_GROUPS])
267 nla_for_each_nested(mgrp, attr[CTRL_ATTR_MCAST_GROUPS], mgrpidx)
269 nla_parse(mgrpinfo, CTRL_ATTR_MCAST_GRP_MAX,
270 nla_data(mgrp), nla_len(mgrp), NULL);
272 if (mgrpinfo[CTRL_ATTR_MCAST_GRP_ID] &&
273 mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME] &&
274 !strncmp(nla_data(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME]),
275 cv->name, nla_len(mgrpinfo[CTRL_ATTR_MCAST_GRP_NAME])))
277 cv->id = nla_get_u32(mgrpinfo[CTRL_ATTR_MCAST_GRP_ID]);
285 static int nl80211_subscribe(const char *family, const char *group)
287 struct nl80211_group_conveyor cv = { .name = group, .id = -ENOENT };
288 struct nl80211_msg_conveyor *req;
290 req = nl80211_ctl(CTRL_CMD_GETFAMILY, 0);
293 NLA_PUT_STRING(req->msg, CTRL_ATTR_FAMILY_NAME, family);
294 nl80211_send(req, nl80211_subscribe_cb, &cv);
300 return nl_socket_add_membership(nls->nl_sock, cv.id);
304 static int nl80211_wait_cb(struct nl_msg *msg, void *arg)
306 struct nl80211_event_conveyor *cv = arg;
307 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
309 if (gnlh->cmd == cv->wait)
310 cv->recv = gnlh->cmd;
315 static int nl80211_wait_seq_check(struct nl_msg *msg, void *arg)
320 static int nl80211_wait(const char *family, const char *group, int cmd)
322 struct nl80211_event_conveyor cv = { .wait = cmd };
325 if (nl80211_subscribe(family, group))
328 cb = nl_cb_alloc(NL_CB_DEFAULT);
333 nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, nl80211_wait_seq_check, NULL);
334 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, nl80211_wait_cb, &cv );
337 nl_recvmsgs(nls->nl_sock, cb);
345 static int nl80211_freq2channel(int freq)
351 return (freq - 2407) / 5;
353 return (freq / 5) - 1000;
356 static int nl80211_channel2freq(int channel, const char *band)
361 if ((channel < 14) && (!band || band[0] != 'a'))
362 return (channel * 5) + 2407;
365 return (1000 + channel) * 5;
370 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
373 char lkey[64] = { 0 };
374 const char *ln = buf;
375 static char lval[256] = { 0 };
377 int matched_if = ifname ? 0 : 1;
380 for( i = 0, len = strlen(buf); i < len; i++ )
382 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
386 else if (!lkey[0] && (buf[i] == '='))
388 if ((&buf[i] - ln) > 0)
389 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
391 else if (buf[i] == '\n')
395 memcpy(lval, ln + strlen(lkey) + 1,
396 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
398 if ((ifname != NULL) &&
399 (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
401 matched_if = !strcmp(lval, ifname);
403 else if (matched_if && !strcmp(lkey, key))
410 memset(lkey, 0, sizeof(lkey));
411 memset(lval, 0, sizeof(lval));
418 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
421 struct nlattr **attr = nl80211_parse(msg);
423 if (attr[NL80211_ATTR_WIPHY_NAME])
424 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
425 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
432 static char * nl80211_ifname2phy(const char *ifname)
434 static char phy[32] = { 0 };
435 struct nl80211_msg_conveyor *req;
437 memset(phy, 0, sizeof(phy));
439 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
442 nl80211_send(req, nl80211_ifname2phy_cb, phy);
446 return phy[0] ? phy : NULL;
449 static char * nl80211_hostapd_info(const char *ifname)
453 char path[32] = { 0 };
454 static char buf[4096] = { 0 };
457 if (nl80211_get_mode(ifname, &mode))
460 if ((mode == IWINFO_OPMODE_MASTER || mode == IWINFO_OPMODE_AP_VLAN) &&
461 (phy = nl80211_ifname2phy(ifname)) != NULL)
463 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
465 if ((conf = fopen(path, "r")) != NULL)
467 fread(buf, sizeof(buf) - 1, 1, conf);
477 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
480 struct timeval tv = { 2, 0 };
485 memset(buf, 0, blen);
488 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
491 if (!FD_ISSET(sock, &rfds))
494 return recv(sock, buf, blen, 0);
497 static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
503 size_t remote_length, local_length;
504 static char buffer[10240] = { 0 };
506 struct sockaddr_un local = { 0 };
507 struct sockaddr_un remote = { 0 };
510 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
514 remote.sun_family = AF_UNIX;
515 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
516 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
518 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
521 if (connect(sock, (struct sockaddr *) &remote, remote_length))
524 local.sun_family = AF_UNIX;
525 local_length = sizeof(local.sun_family) +
526 sprintf(local.sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
528 if (bind(sock, (struct sockaddr *) &local, local_length))
534 send(sock, "ATTACH", 6, 0);
536 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
541 send(sock, cmd, strlen(cmd), 0);
543 while( numtry++ < 5 )
545 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
553 if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
562 if (local.sun_family)
563 unlink(local.sun_path);
568 static inline int nl80211_readint(const char *path)
574 if ((fd = open(path, O_RDONLY)) > -1)
576 if (read(fd, buffer, sizeof(buffer)) > 0)
585 static char * nl80211_phy2ifname(const char *ifname)
587 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
589 static char nif[IFNAMSIZ] = { 0 };
596 else if (!strncmp(ifname, "phy", 3))
597 phyidx = atoi(&ifname[3]);
598 else if (!strncmp(ifname, "radio", 5))
599 phyidx = atoi(&ifname[5]);
601 memset(nif, 0, sizeof(nif));
605 if ((d = opendir("/sys/class/net")) != NULL)
607 while ((e = readdir(d)) != NULL)
609 snprintf(buffer, sizeof(buffer),
610 "/sys/class/net/%s/phy80211/index", e->d_name);
612 if (nl80211_readint(buffer) == phyidx)
614 snprintf(buffer, sizeof(buffer),
615 "/sys/class/net/%s/ifindex", e->d_name);
617 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
618 ((ifidx < 0) || (cifidx < ifidx)))
621 strncpy(nif, e->d_name, sizeof(nif));
630 return nif[0] ? nif : NULL;
633 static char * nl80211_ifadd(const char *ifname)
637 static char nif[IFNAMSIZ] = { 0 };
638 struct nl80211_msg_conveyor *req, *res;
640 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
643 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
645 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
646 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
648 nl80211_send(req, NULL, NULL);
659 static void nl80211_ifdel(const char *ifname)
661 struct nl80211_msg_conveyor *req;
663 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
666 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
668 nl80211_send(req, NULL, NULL);
675 static void nl80211_hostapd_hup(const char *ifname)
679 char *phy = nl80211_ifname2phy(ifname);
683 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
684 if ((fd = open(buf, O_RDONLY)) > 0)
686 if (read(fd, buf, sizeof(buf)) > 0)
698 int nl80211_probe(const char *ifname)
700 return !!nl80211_ifname2phy(ifname);
703 void nl80211_close(void)
708 genl_family_put(nls->nlctrl);
711 genl_family_put(nls->nl80211);
714 nl_socket_free(nls->nl_sock);
717 nl_cache_free(nls->nl_cache);
725 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
728 struct nlattr **tb = nl80211_parse(msg);
729 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
730 IWINFO_OPMODE_UNKNOWN, /* unspecified */
731 IWINFO_OPMODE_ADHOC, /* IBSS */
732 IWINFO_OPMODE_CLIENT, /* managed */
733 IWINFO_OPMODE_MASTER, /* AP */
734 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
735 IWINFO_OPMODE_WDS, /* WDS */
736 IWINFO_OPMODE_MONITOR, /* monitor */
737 IWINFO_OPMODE_MESHPOINT, /* mesh point */
738 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
739 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
742 if (tb[NL80211_ATTR_IFTYPE])
743 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
748 int nl80211_get_mode(const char *ifname, int *buf)
751 struct nl80211_msg_conveyor *req;
753 res = nl80211_phy2ifname(ifname);
754 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
755 *buf = IWINFO_OPMODE_UNKNOWN;
759 nl80211_send(req, nl80211_get_mode_cb, buf);
763 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
767 struct nl80211_ssid_bssid {
769 unsigned char bssid[7];
772 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
776 struct nl80211_ssid_bssid *sb = arg;
777 struct nlattr **tb = nl80211_parse(msg);
778 struct nlattr *bss[NL80211_BSS_MAX + 1];
780 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
781 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
782 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
785 if (!tb[NL80211_ATTR_BSS] ||
786 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
788 !bss[NL80211_BSS_BSSID] ||
789 !bss[NL80211_BSS_STATUS] ||
790 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
795 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
797 case NL80211_BSS_STATUS_ASSOCIATED:
798 case NL80211_BSS_STATUS_AUTHENTICATED:
799 case NL80211_BSS_STATUS_IBSS_JOINED:
803 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
804 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
806 while (ielen >= 2 && ielen >= ie[1])
810 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
821 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
830 int nl80211_get_ssid(const char *ifname, char *buf)
833 struct nl80211_msg_conveyor *req;
834 struct nl80211_ssid_bssid sb;
836 /* try to find ssid from scan dump results */
837 res = nl80211_phy2ifname(ifname);
838 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
845 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
849 /* failed, try to find from hostapd info */
851 (res = nl80211_hostapd_info(ifname)) &&
852 (res = nl80211_getval(ifname, res, "ssid")))
854 memcpy(buf, res, strlen(res));
857 return (*buf == 0) ? -1 : 0;
860 int nl80211_get_bssid(const char *ifname, char *buf)
863 struct nl80211_msg_conveyor *req;
864 struct nl80211_ssid_bssid sb;
866 /* try to find bssid from scan dump results */
867 res = nl80211_phy2ifname(ifname);
868 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
875 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
879 /* failed, try to find mac from hostapd info */
880 if ((sb.bssid[0] == 0) &&
881 (res = nl80211_hostapd_info(ifname)) &&
882 (res = nl80211_getval(ifname, res, "bssid")))
885 sb.bssid[1] = strtol(&res[0], NULL, 16);
886 sb.bssid[2] = strtol(&res[3], NULL, 16);
887 sb.bssid[3] = strtol(&res[6], NULL, 16);
888 sb.bssid[4] = strtol(&res[9], NULL, 16);
889 sb.bssid[5] = strtol(&res[12], NULL, 16);
890 sb.bssid[6] = strtol(&res[15], NULL, 16);
895 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
896 sb.bssid[1], sb.bssid[2], sb.bssid[3],
897 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
906 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
909 struct nlattr **attr = nl80211_parse(msg);
910 struct nlattr *binfo[NL80211_BSS_MAX + 1];
912 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
913 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
916 if (attr[NL80211_ATTR_BSS] &&
917 !nla_parse_nested(binfo, NL80211_BSS_MAX,
918 attr[NL80211_ATTR_BSS], bss_policy))
920 if (binfo[NL80211_BSS_FREQUENCY])
921 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
927 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
930 struct nlattr **tb = nl80211_parse(msg);
932 if (tb[NL80211_ATTR_WIPHY_FREQ])
933 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
938 int nl80211_get_frequency(const char *ifname, int *buf)
941 struct nl80211_msg_conveyor *req;
943 /* try to find frequency from interface info */
944 res = nl80211_phy2ifname(ifname);
945 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
950 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
954 /* failed, try to find frequency from hostapd info */
956 (res = nl80211_hostapd_info(ifname)) &&
957 (channel = nl80211_getval(NULL, res, "channel")))
959 *buf = nl80211_channel2freq(atoi(channel),
960 nl80211_getval(NULL, res, "hw_mode"));
964 /* failed, try to find frequency from scan results */
967 res = nl80211_phy2ifname(ifname);
968 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN,
973 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
979 return (*buf == 0) ? -1 : 0;
982 int nl80211_get_channel(const char *ifname, int *buf)
984 if (!nl80211_get_frequency(ifname, buf))
986 *buf = nl80211_freq2channel(*buf);
994 int nl80211_get_txpower(const char *ifname, int *buf)
1000 res = nl80211_ifname2phy(ifname);
1001 snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1002 res ? res : ifname);
1004 if ((*buf = nl80211_readint(path)) > -1)
1008 return wext_get_txpower(ifname, buf);
1012 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1016 struct nl80211_rssi_rate *rr = arg;
1017 struct nlattr **attr = nl80211_parse(msg);
1018 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1019 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1021 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1022 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1023 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1024 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1025 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1026 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1027 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1028 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1029 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1030 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1031 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1034 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1035 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1036 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1037 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1038 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1041 if (attr[NL80211_ATTR_STA_INFO])
1043 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1044 attr[NL80211_ATTR_STA_INFO], stats_policy))
1046 if (sinfo[NL80211_STA_INFO_SIGNAL])
1048 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1049 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1052 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1054 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1055 sinfo[NL80211_STA_INFO_TX_BITRATE],
1058 if (rinfo[NL80211_RATE_INFO_BITRATE])
1060 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1062 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1072 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1076 struct nl80211_msg_conveyor *req;
1081 if ((d = opendir("/sys/class/net")) != NULL)
1083 while ((de = readdir(d)) != NULL)
1085 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1086 (!de->d_name[strlen(ifname)] ||
1087 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1089 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1094 nl80211_send(req, nl80211_fill_signal_cb, r);
1104 int nl80211_get_bitrate(const char *ifname, int *buf)
1106 struct nl80211_rssi_rate rr;
1108 nl80211_fill_signal(ifname, &rr);
1112 *buf = (rr.rate * 100);
1119 int nl80211_get_signal(const char *ifname, int *buf)
1121 struct nl80211_rssi_rate rr;
1123 nl80211_fill_signal(ifname, &rr);
1134 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1136 int8_t *noise = arg;
1137 struct nlattr **tb = nl80211_parse(msg);
1138 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1140 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1141 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1142 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1145 if (!tb[NL80211_ATTR_SURVEY_INFO])
1148 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1149 tb[NL80211_ATTR_SURVEY_INFO], sp))
1152 if (!si[NL80211_SURVEY_INFO_NOISE])
1155 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1156 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1162 int nl80211_get_noise(const char *ifname, int *buf)
1165 struct nl80211_msg_conveyor *req;
1167 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1172 nl80211_send(req, nl80211_get_noise_cb, &noise);
1185 int nl80211_get_quality(const char *ifname, int *buf)
1189 if (!nl80211_get_signal(ifname, &signal))
1191 /* A positive signal level is usually just a quality
1192 * value, pass through as-is */
1198 /* The cfg80211 wext compat layer assumes a signal range
1199 * of -110 dBm to -40 dBm, the quality value is derived
1200 * by adding 110 to the signal level */
1205 else if (signal > -40)
1208 *buf = (signal + 110);
1217 int nl80211_get_quality_max(const char *ifname, int *buf)
1219 /* The cfg80211 wext compat layer assumes a maximum
1226 int nl80211_get_encryption(const char *ifname, char *buf)
1231 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1233 /* WPA supplicant */
1234 if ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
1235 (val = nl80211_getval(NULL, res, "pairwise_cipher")))
1238 if (strstr(val, "WEP"))
1240 if (strstr(val, "WEP-40"))
1241 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1243 else if (strstr(val, "WEP-104"))
1244 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1247 c->group_ciphers = c->pair_ciphers;
1249 c->auth_suites |= IWINFO_KMGMT_NONE;
1250 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1256 if (strstr(val, "TKIP"))
1257 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1259 else if (strstr(val, "CCMP"))
1260 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1262 else if (strstr(val, "NONE"))
1263 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1265 else if (strstr(val, "WEP-40"))
1266 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1268 else if (strstr(val, "WEP-104"))
1269 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1272 if ((val = nl80211_getval(NULL, res, "group_cipher")))
1274 if (strstr(val, "TKIP"))
1275 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1277 else if (strstr(val, "CCMP"))
1278 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1280 else if (strstr(val, "NONE"))
1281 c->group_ciphers |= IWINFO_CIPHER_NONE;
1283 else if (strstr(val, "WEP-40"))
1284 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1286 else if (strstr(val, "WEP-104"))
1287 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1291 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
1293 if (strstr(val, "WPA2"))
1296 else if (strstr(val, "WPA"))
1300 if (strstr(val, "PSK"))
1301 c->auth_suites |= IWINFO_KMGMT_PSK;
1303 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
1304 c->auth_suites |= IWINFO_KMGMT_8021x;
1306 else if (strstr(val, "NONE"))
1307 c->auth_suites |= IWINFO_KMGMT_NONE;
1310 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1317 else if ((res = nl80211_hostapd_info(ifname)))
1319 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
1320 c->wpa_version = atoi(val);
1322 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
1324 if (!val || strstr(val, "PSK"))
1325 c->auth_suites |= IWINFO_KMGMT_PSK;
1327 if (val && strstr(val, "EAP"))
1328 c->auth_suites |= IWINFO_KMGMT_8021x;
1330 if (val && strstr(val, "NONE"))
1331 c->auth_suites |= IWINFO_KMGMT_NONE;
1333 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
1335 if (strstr(val, "TKIP"))
1336 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1338 if (strstr(val, "CCMP"))
1339 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1341 if (strstr(val, "NONE"))
1342 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1345 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1349 c->auth_algs |= IWINFO_AUTH_OPEN;
1353 c->auth_algs |= IWINFO_AUTH_SHARED;
1357 c->auth_algs |= IWINFO_AUTH_OPEN;
1358 c->auth_algs |= IWINFO_AUTH_SHARED;
1365 for (i = 0; i < 4; i++)
1367 snprintf(k, sizeof(k), "wep_key%d", i);
1369 if ((val = nl80211_getval(ifname, res, k)))
1371 if ((strlen(val) == 5) || (strlen(val) == 10))
1372 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1374 else if ((strlen(val) == 13) || (strlen(val) == 26))
1375 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1380 c->group_ciphers = c->pair_ciphers;
1381 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1390 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1392 struct nl80211_array_buf *arr = arg;
1393 struct iwinfo_assoclist_entry *e = arr->buf;
1394 struct nlattr **attr = nl80211_parse(msg);
1395 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1396 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1398 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1399 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1400 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1401 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1402 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1403 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1404 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1407 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1408 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1409 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1410 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1411 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1414 /* advance to end of array */
1416 memset(e, 0, sizeof(*e));
1418 if (attr[NL80211_ATTR_MAC])
1419 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1421 if (attr[NL80211_ATTR_STA_INFO] &&
1422 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1423 attr[NL80211_ATTR_STA_INFO], stats_policy))
1425 if (sinfo[NL80211_STA_INFO_SIGNAL])
1426 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1428 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1429 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1431 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1432 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1434 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1435 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1437 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1438 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1439 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1441 if (rinfo[NL80211_RATE_INFO_BITRATE])
1443 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1445 if (rinfo[NL80211_RATE_INFO_MCS])
1446 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1448 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1449 e->rx_rate.is_40mhz = 1;
1451 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1452 e->rx_rate.is_short_gi = 1;
1455 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1456 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1457 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1459 if (rinfo[NL80211_RATE_INFO_BITRATE])
1461 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1463 if (rinfo[NL80211_RATE_INFO_MCS])
1464 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1466 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1467 e->tx_rate.is_40mhz = 1;
1469 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1470 e->tx_rate.is_short_gi = 1;
1474 e->noise = 0; /* filled in by caller */
1480 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1485 struct nl80211_msg_conveyor *req;
1486 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1487 struct iwinfo_assoclist_entry *e;
1489 if ((d = opendir("/sys/class/net")) != NULL)
1491 while ((de = readdir(d)) != NULL)
1493 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1494 (!de->d_name[strlen(ifname)] ||
1495 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1497 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1502 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1510 if (!nl80211_get_noise(ifname, &noise))
1511 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1514 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1521 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1524 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1526 struct nlattr **attr = nl80211_parse(msg);
1527 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1528 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1529 struct nlattr *band, *freq;
1531 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1532 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1533 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1534 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1535 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1536 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1537 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1540 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1543 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1545 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1546 nla_len(band), NULL);
1548 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1550 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1551 nla_data(freq), nla_len(freq), freq_policy);
1553 ch_cmp = nl80211_freq2channel(nla_get_u32(
1554 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1556 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1557 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1559 *dbm_max = (int)(0.01 * nla_get_u32(
1560 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1570 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1573 int dbm_max = -1, dbm_cur, dbm_cnt;
1574 struct nl80211_msg_conveyor *req;
1575 struct iwinfo_txpwrlist_entry entry;
1577 if (nl80211_get_channel(ifname, &ch_cur))
1580 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1583 /* initialize the value pointer with channel for callback */
1586 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1592 for (dbm_cur = 0, dbm_cnt = 0;
1594 dbm_cur++, dbm_cnt++)
1596 entry.dbm = dbm_cur;
1597 entry.mw = iwinfo_dbm2mw(dbm_cur);
1599 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1602 entry.dbm = dbm_max;
1603 entry.mw = iwinfo_dbm2mw(dbm_max);
1605 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1608 *len = dbm_cnt * sizeof(entry);
1615 static void nl80211_get_scancrypto(const char *spec,
1616 struct iwinfo_crypto_entry *c)
1618 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1622 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1625 else if (strstr(spec, "WPA2"))
1628 else if (strstr(spec, "WPA"))
1631 else if (strstr(spec, "WEP"))
1632 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1635 if (strstr(spec, "PSK"))
1636 c->auth_suites |= IWINFO_KMGMT_PSK;
1638 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1639 c->auth_suites |= IWINFO_KMGMT_8021x;
1641 if (strstr(spec, "WPA-NONE"))
1642 c->auth_suites |= IWINFO_KMGMT_NONE;
1645 if (strstr(spec, "TKIP"))
1646 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1648 if (strstr(spec, "CCMP"))
1649 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1651 if (strstr(spec, "WEP-40"))
1652 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1654 if (strstr(spec, "WEP-104"))
1655 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1657 c->group_ciphers = c->pair_ciphers;
1666 struct nl80211_scanlist {
1667 struct iwinfo_scanlist_entry *e;
1672 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1673 struct iwinfo_scanlist_entry *e)
1675 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1676 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1677 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1679 while (ielen >= 2 && ielen >= ie[1])
1684 memcpy(e->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1688 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1689 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1692 case 221: /* Vendor */
1693 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1694 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1695 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1704 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1709 struct nl80211_scanlist *sl = arg;
1710 struct nlattr **tb = nl80211_parse(msg);
1711 struct nlattr *bss[NL80211_BSS_MAX + 1];
1713 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1714 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1715 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1716 [NL80211_BSS_BSSID] = { },
1717 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1718 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1719 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
1720 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1721 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1722 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1723 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1724 [NL80211_BSS_BEACON_IES] = { },
1727 if (!tb[NL80211_ATTR_BSS] ||
1728 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1730 !bss[NL80211_BSS_BSSID])
1735 if (bss[NL80211_BSS_CAPABILITY])
1736 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1740 memset(sl->e, 0, sizeof(*sl->e));
1741 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
1744 sl->e->mode = IWINFO_OPMODE_ADHOC;
1746 sl->e->mode = IWINFO_OPMODE_MASTER;
1749 sl->e->crypto.enabled = 1;
1751 if (bss[NL80211_BSS_FREQUENCY])
1752 sl->e->channel = nl80211_freq2channel(nla_get_u32(
1753 bss[NL80211_BSS_FREQUENCY]));
1755 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
1756 nl80211_get_scanlist_ie(bss, sl->e);
1758 if (bss[NL80211_BSS_SIGNAL_MBM])
1761 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
1763 rssi = sl->e->signal - 0x100;
1767 else if (rssi > -40)
1770 sl->e->quality = (rssi + 110);
1771 sl->e->quality_max = 70;
1774 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
1776 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1777 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
1786 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
1788 struct nl80211_msg_conveyor *req;
1789 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
1791 req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
1794 nl80211_send(req, NULL, NULL);
1798 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
1800 req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1803 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
1807 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
1808 return *len ? 0 : -1;
1811 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1813 int freq, rssi, qmax, count;
1815 char ssid[128] = { 0 };
1816 char bssid[18] = { 0 };
1817 char cipher[256] = { 0 };
1819 /* Got a radioX pseudo interface, find some interface on it or create one */
1820 if (!strncmp(ifname, "radio", 5))
1822 /* Reuse existing interface */
1823 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1825 return nl80211_get_scanlist(res, buf, len);
1828 /* Need to spawn a temporary iface for scanning */
1829 else if ((res = nl80211_ifadd(ifname)) != NULL)
1831 count = nl80211_get_scanlist(res, buf, len);
1837 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1839 /* WPA supplicant */
1840 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1842 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1844 nl80211_get_quality_max(ifname, &qmax);
1846 /* skip header line */
1847 while (*res++ != '\n');
1851 while (sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1852 bssid, &freq, &rssi, cipher, ssid) > 0)
1855 e->mac[0] = strtol(&bssid[0], NULL, 16);
1856 e->mac[1] = strtol(&bssid[3], NULL, 16);
1857 e->mac[2] = strtol(&bssid[6], NULL, 16);
1858 e->mac[3] = strtol(&bssid[9], NULL, 16);
1859 e->mac[4] = strtol(&bssid[12], NULL, 16);
1860 e->mac[5] = strtol(&bssid[15], NULL, 16);
1863 memcpy(e->ssid, ssid, min(strlen(ssid), sizeof(e->ssid) - 1));
1865 /* Mode (assume master) */
1866 e->mode = IWINFO_OPMODE_MASTER;
1869 e->channel = nl80211_freq2channel(freq);
1877 /* The cfg80211 wext compat layer assumes a signal range
1878 * of -110 dBm to -40 dBm, the quality value is derived
1879 * by adding 110 to the signal level */
1882 else if (rssi > -40)
1885 e->quality = (rssi + 110);
1893 e->quality_max = qmax;
1896 nl80211_get_scancrypto(cipher, &e->crypto);
1898 /* advance to next line */
1899 while (*res && *res++ != '\n');
1904 memset(ssid, 0, sizeof(ssid));
1905 memset(bssid, 0, sizeof(bssid));
1906 memset(cipher, 0, sizeof(cipher));
1909 *len = count * sizeof(struct iwinfo_scanlist_entry);
1917 /* Got a temp interface, don't create yet another one */
1918 if (!strncmp(ifname, "tmp.", 4))
1920 if (!iwinfo_ifup(ifname))
1923 nl80211_get_scanlist_nl(ifname, buf, len);
1924 iwinfo_ifdown(ifname);
1928 /* Spawn a new scan interface */
1931 if (!(res = nl80211_ifadd(ifname)))
1934 if (!iwinfo_ifmac(res))
1937 /* if we can take the new interface up, the driver supports an
1938 * additional interface and there's no need to tear down the ap */
1939 if (iwinfo_ifup(res))
1941 nl80211_get_scanlist_nl(res, buf, len);
1945 /* driver cannot create secondary interface, take down ap
1947 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1949 nl80211_get_scanlist_nl(res, buf, len);
1951 iwinfo_ifup(ifname);
1952 nl80211_hostapd_hup(ifname);
1964 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
1966 int bands_remain, freqs_remain;
1968 struct nl80211_array_buf *arr = arg;
1969 struct iwinfo_freqlist_entry *e = arr->buf;
1971 struct nlattr **attr = nl80211_parse(msg);
1972 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1973 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1974 struct nlattr *band, *freq;
1976 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1977 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1978 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1979 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1980 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1981 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1982 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1985 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1987 nla_parse(bands, NL80211_BAND_ATTR_MAX,
1988 nla_data(band), nla_len(band), NULL);
1990 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1992 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1993 nla_data(freq), nla_len(freq), NULL);
1995 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
1996 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
1999 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2000 e->channel = nl80211_freq2channel(e->mhz);
2003 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
2004 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
2005 freqs[NL80211_FREQUENCY_ATTR_RADAR]
2016 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2018 struct nl80211_msg_conveyor *req;
2019 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2021 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2024 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2030 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2037 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2040 struct nlattr **attr = nl80211_parse(msg);
2042 if (attr[NL80211_ATTR_REG_ALPHA2])
2043 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2050 int nl80211_get_country(const char *ifname, char *buf)
2053 struct nl80211_msg_conveyor *req;
2055 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2058 nl80211_send(req, nl80211_get_country_cb, buf);
2068 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2071 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2072 const struct iwinfo_iso3166_label *l;
2074 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2076 e->iso3166 = l->iso3166;
2077 e->ccode[0] = (l->iso3166 / 256);
2078 e->ccode[1] = (l->iso3166 % 256);
2081 *len = (count * sizeof(struct iwinfo_country_entry));
2085 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
2088 int bands_remain, freqs_remain;
2090 struct nlattr **attr = nl80211_parse(msg);
2091 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2092 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2093 struct nlattr *band, *freq;
2097 if (attr[NL80211_ATTR_WIPHY_BANDS])
2099 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2101 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2102 nla_data(band), nla_len(band), NULL);
2104 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2105 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2107 /* Treat any nonzero capability as 11n */
2109 *modes |= IWINFO_80211_N;
2111 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2114 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2115 nla_data(freq), nla_len(freq), NULL);
2117 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2120 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2122 *modes |= IWINFO_80211_B;
2123 *modes |= IWINFO_80211_G;
2127 *modes |= IWINFO_80211_A;
2136 int nl80211_get_hwmodelist(const char *ifname, int *buf)
2138 struct nl80211_msg_conveyor *req;
2140 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2143 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
2147 return *buf ? 0 : -1;
2150 int nl80211_get_mbssid_support(const char *ifname, int *buf)
2152 /* Test whether we can create another interface */
2153 char *nif = nl80211_ifadd(ifname);
2157 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
2168 int nl80211_get_hardware_id(const char *ifname, char *buf)
2173 /* Got a radioX pseudo interface, find some interface on it or create one */
2174 if (!strncmp(ifname, "radio", 5))
2176 /* Reuse existing interface */
2177 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2179 rv = wext_get_hardware_id(res, buf);
2182 /* Need to spawn a temporary iface for finding IDs */
2183 else if ((res = nl80211_ifadd(ifname)) != NULL)
2185 rv = wext_get_hardware_id(res, buf);
2191 rv = wext_get_hardware_id(ifname, buf);
2194 /* Failed to obtain hardware IDs, search board config */
2197 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2203 static const struct iwinfo_hardware_entry *
2204 nl80211_get_hardware_entry(const char *ifname)
2206 struct iwinfo_hardware_id id;
2208 if (nl80211_get_hardware_id(ifname, (char *)&id))
2211 return iwinfo_hardware(&id);
2214 int nl80211_get_hardware_name(const char *ifname, char *buf)
2216 const struct iwinfo_hardware_entry *hw;
2218 if (!(hw = nl80211_get_hardware_entry(ifname)))
2219 sprintf(buf, "Generic MAC80211");
2221 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2226 int nl80211_get_txpower_offset(const char *ifname, int *buf)
2228 const struct iwinfo_hardware_entry *hw;
2230 if (!(hw = nl80211_get_hardware_entry(ifname)))
2233 *buf = hw->txpower_offset;
2237 int nl80211_get_frequency_offset(const char *ifname, int *buf)
2239 const struct iwinfo_hardware_entry *hw;
2241 if (!(hw = nl80211_get_hardware_entry(ifname)))
2244 *buf = hw->frequency_offset;