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)
349 else if (freq < 2484)
350 return (freq - 2407) / 5;
351 else if (freq >= 4910 && freq <= 4980)
352 return (freq - 4000) / 5;
354 return (freq - 5000) / 5;
357 static int nl80211_channel2freq(int channel, const char *band)
359 if (!band || band[0] != 'a')
363 else if (channel < 14)
364 return (channel * 5) + 2407;
368 if (channel >= 182 && channel <= 196)
369 return (channel * 5) + 4000;
371 return (channel * 5) + 5000;
377 static char * nl80211_getval(const char *ifname, const char *buf, const char *key)
380 char lkey[64] = { 0 };
381 const char *ln = buf;
382 static char lval[256] = { 0 };
384 int matched_if = ifname ? 0 : 1;
387 for( i = 0, len = strlen(buf); i < len; i++ )
389 if (!lkey[0] && (buf[i] == ' ' || buf[i] == '\t'))
393 else if (!lkey[0] && (buf[i] == '='))
395 if ((&buf[i] - ln) > 0)
396 memcpy(lkey, ln, min(sizeof(lkey) - 1, &buf[i] - ln));
398 else if (buf[i] == '\n')
402 memcpy(lval, ln + strlen(lkey) + 1,
403 min(sizeof(lval) - 1, &buf[i] - ln - strlen(lkey) - 1));
405 if ((ifname != NULL) &&
406 (!strcmp(lkey, "interface") || !strcmp(lkey, "bss")) )
408 matched_if = !strcmp(lval, ifname);
410 else if (matched_if && !strcmp(lkey, key))
417 memset(lkey, 0, sizeof(lkey));
418 memset(lval, 0, sizeof(lval));
425 static int nl80211_ifname2phy_cb(struct nl_msg *msg, void *arg)
428 struct nlattr **attr = nl80211_parse(msg);
430 if (attr[NL80211_ATTR_WIPHY_NAME])
431 memcpy(buf, nla_data(attr[NL80211_ATTR_WIPHY_NAME]),
432 nla_len(attr[NL80211_ATTR_WIPHY_NAME]));
439 static char * nl80211_ifname2phy(const char *ifname)
441 static char phy[32] = { 0 };
442 struct nl80211_msg_conveyor *req;
444 memset(phy, 0, sizeof(phy));
446 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
449 nl80211_send(req, nl80211_ifname2phy_cb, phy);
453 return phy[0] ? phy : NULL;
456 static char * nl80211_hostapd_info(const char *ifname)
460 char path[32] = { 0 };
461 static char buf[4096] = { 0 };
464 if (nl80211_get_mode(ifname, &mode))
467 if ((mode == IWINFO_OPMODE_MASTER || mode == IWINFO_OPMODE_AP_VLAN) &&
468 (phy = nl80211_ifname2phy(ifname)) != NULL)
470 snprintf(path, sizeof(path), "/var/run/hostapd-%s.conf", phy);
472 if ((conf = fopen(path, "r")) != NULL)
474 fread(buf, sizeof(buf) - 1, 1, conf);
484 static inline int nl80211_wpactl_recv(int sock, char *buf, int blen)
487 struct timeval tv = { 2, 0 };
492 memset(buf, 0, blen);
495 if (select(sock + 1, &rfds, NULL, NULL, &tv) < 0)
498 if (!FD_ISSET(sock, &rfds))
501 return recv(sock, buf, blen, 0);
504 static char * nl80211_wpactl_info(const char *ifname, const char *cmd,
510 size_t remote_length, local_length;
511 static char buffer[10240] = { 0 };
513 struct sockaddr_un local = { 0 };
514 struct sockaddr_un remote = { 0 };
517 sock = socket(PF_UNIX, SOCK_DGRAM, 0);
521 remote.sun_family = AF_UNIX;
522 remote_length = sizeof(remote.sun_family) + sprintf(remote.sun_path,
523 "/var/run/wpa_supplicant-%s/%s", ifname, ifname);
525 if (fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC) < 0)
528 if (connect(sock, (struct sockaddr *) &remote, remote_length))
531 local.sun_family = AF_UNIX;
532 local_length = sizeof(local.sun_family) +
533 sprintf(local.sun_path, "/var/run/iwinfo-%s-%d", ifname, getpid());
535 if (bind(sock, (struct sockaddr *) &local, local_length))
541 send(sock, "ATTACH", 6, 0);
543 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
548 send(sock, cmd, strlen(cmd), 0);
550 while( numtry++ < 5 )
552 if (nl80211_wpactl_recv(sock, buffer, sizeof(buffer)) <= 0)
560 if ((!event && buffer[0] != '<') || (event && strstr(buffer, event)))
569 if (local.sun_family)
570 unlink(local.sun_path);
575 static inline int nl80211_readint(const char *path)
581 if ((fd = open(path, O_RDONLY)) > -1)
583 if (read(fd, buffer, sizeof(buffer)) > 0)
592 static char * nl80211_phy2ifname(const char *ifname)
594 int fd, ifidx = -1, cifidx = -1, phyidx = -1;
596 static char nif[IFNAMSIZ] = { 0 };
603 else if (!strncmp(ifname, "phy", 3))
604 phyidx = atoi(&ifname[3]);
605 else if (!strncmp(ifname, "radio", 5))
606 phyidx = atoi(&ifname[5]);
608 memset(nif, 0, sizeof(nif));
612 if ((d = opendir("/sys/class/net")) != NULL)
614 while ((e = readdir(d)) != NULL)
616 snprintf(buffer, sizeof(buffer),
617 "/sys/class/net/%s/phy80211/index", e->d_name);
619 if (nl80211_readint(buffer) == phyidx)
621 snprintf(buffer, sizeof(buffer),
622 "/sys/class/net/%s/ifindex", e->d_name);
624 if ((cifidx = nl80211_readint(buffer)) >= 0 &&
625 ((ifidx < 0) || (cifidx < ifidx)))
628 strncpy(nif, e->d_name, sizeof(nif));
637 return nif[0] ? nif : NULL;
640 static char * nl80211_ifadd(const char *ifname)
644 static char nif[IFNAMSIZ] = { 0 };
645 struct nl80211_msg_conveyor *req, *res;
647 req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
650 snprintf(nif, sizeof(nif), "tmp.%s", ifname);
652 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
653 NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
655 nl80211_send(req, NULL, NULL);
666 static void nl80211_ifdel(const char *ifname)
668 struct nl80211_msg_conveyor *req;
670 req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
673 NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
675 nl80211_send(req, NULL, NULL);
682 static void nl80211_hostapd_hup(const char *ifname)
686 char *phy = nl80211_ifname2phy(ifname);
690 snprintf(buf, sizeof(buf), "/var/run/wifi-%s.pid", phy);
691 if ((fd = open(buf, O_RDONLY)) > 0)
693 if (read(fd, buf, sizeof(buf)) > 0)
705 int nl80211_probe(const char *ifname)
707 return !!nl80211_ifname2phy(ifname);
710 void nl80211_close(void)
715 genl_family_put(nls->nlctrl);
718 genl_family_put(nls->nl80211);
721 nl_socket_free(nls->nl_sock);
724 nl_cache_free(nls->nl_cache);
732 static int nl80211_get_mode_cb(struct nl_msg *msg, void *arg)
735 struct nlattr **tb = nl80211_parse(msg);
736 const int ifmodes[NL80211_IFTYPE_MAX + 1] = {
737 IWINFO_OPMODE_UNKNOWN, /* unspecified */
738 IWINFO_OPMODE_ADHOC, /* IBSS */
739 IWINFO_OPMODE_CLIENT, /* managed */
740 IWINFO_OPMODE_MASTER, /* AP */
741 IWINFO_OPMODE_AP_VLAN, /* AP/VLAN */
742 IWINFO_OPMODE_WDS, /* WDS */
743 IWINFO_OPMODE_MONITOR, /* monitor */
744 IWINFO_OPMODE_MESHPOINT, /* mesh point */
745 IWINFO_OPMODE_P2P_CLIENT, /* P2P-client */
746 IWINFO_OPMODE_P2P_GO, /* P2P-GO */
749 if (tb[NL80211_ATTR_IFTYPE])
750 *mode = ifmodes[nla_get_u32(tb[NL80211_ATTR_IFTYPE])];
755 int nl80211_get_mode(const char *ifname, int *buf)
758 struct nl80211_msg_conveyor *req;
760 res = nl80211_phy2ifname(ifname);
761 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
762 *buf = IWINFO_OPMODE_UNKNOWN;
766 nl80211_send(req, nl80211_get_mode_cb, buf);
770 return (*buf == IWINFO_OPMODE_UNKNOWN) ? -1 : 0;
774 struct nl80211_ssid_bssid {
776 unsigned char bssid[7];
779 static int nl80211_get_ssid_bssid_cb(struct nl_msg *msg, void *arg)
783 struct nl80211_ssid_bssid *sb = arg;
784 struct nlattr **tb = nl80211_parse(msg);
785 struct nlattr *bss[NL80211_BSS_MAX + 1];
787 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
788 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
789 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
792 if (!tb[NL80211_ATTR_BSS] ||
793 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
795 !bss[NL80211_BSS_BSSID] ||
796 !bss[NL80211_BSS_STATUS] ||
797 !bss[NL80211_BSS_INFORMATION_ELEMENTS])
802 switch (nla_get_u32(bss[NL80211_BSS_STATUS]))
804 case NL80211_BSS_STATUS_ASSOCIATED:
805 case NL80211_BSS_STATUS_AUTHENTICATED:
806 case NL80211_BSS_STATUS_IBSS_JOINED:
810 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
811 ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
813 while (ielen >= 2 && ielen >= ie[1])
817 memcpy(sb->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
828 memcpy(sb->bssid + 1, nla_data(bss[NL80211_BSS_BSSID]), 6);
837 int nl80211_get_ssid(const char *ifname, char *buf)
840 struct nl80211_msg_conveyor *req;
841 struct nl80211_ssid_bssid sb;
843 /* try to find ssid from scan dump results */
844 res = nl80211_phy2ifname(ifname);
845 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
852 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
856 /* failed, try to find from hostapd info */
858 (res = nl80211_hostapd_info(ifname)) &&
859 (res = nl80211_getval(ifname, res, "ssid")))
861 memcpy(buf, res, strlen(res));
864 return (*buf == 0) ? -1 : 0;
867 int nl80211_get_bssid(const char *ifname, char *buf)
870 struct nl80211_msg_conveyor *req;
871 struct nl80211_ssid_bssid sb;
873 /* try to find bssid from scan dump results */
874 res = nl80211_phy2ifname(ifname);
875 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
882 nl80211_send(req, nl80211_get_ssid_bssid_cb, &sb);
886 /* failed, try to find mac from hostapd info */
887 if ((sb.bssid[0] == 0) &&
888 (res = nl80211_hostapd_info(ifname)) &&
889 (res = nl80211_getval(ifname, res, "bssid")))
892 sb.bssid[1] = strtol(&res[0], NULL, 16);
893 sb.bssid[2] = strtol(&res[3], NULL, 16);
894 sb.bssid[3] = strtol(&res[6], NULL, 16);
895 sb.bssid[4] = strtol(&res[9], NULL, 16);
896 sb.bssid[5] = strtol(&res[12], NULL, 16);
897 sb.bssid[6] = strtol(&res[15], NULL, 16);
902 sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X",
903 sb.bssid[1], sb.bssid[2], sb.bssid[3],
904 sb.bssid[4], sb.bssid[5], sb.bssid[6]);
913 static int nl80211_get_frequency_scan_cb(struct nl_msg *msg, void *arg)
916 struct nlattr **attr = nl80211_parse(msg);
917 struct nlattr *binfo[NL80211_BSS_MAX + 1];
919 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
920 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
921 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
924 if (attr[NL80211_ATTR_BSS] &&
925 !nla_parse_nested(binfo, NL80211_BSS_MAX,
926 attr[NL80211_ATTR_BSS], bss_policy))
928 if (binfo[NL80211_BSS_STATUS] && binfo[NL80211_BSS_FREQUENCY])
929 *freq = nla_get_u32(binfo[NL80211_BSS_FREQUENCY]);
935 static int nl80211_get_frequency_info_cb(struct nl_msg *msg, void *arg)
938 struct nlattr **tb = nl80211_parse(msg);
940 if (tb[NL80211_ATTR_WIPHY_FREQ])
941 *freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
946 int nl80211_get_frequency(const char *ifname, int *buf)
950 struct nl80211_msg_conveyor *req;
952 /* try to find frequency from interface info */
953 res = nl80211_phy2ifname(ifname);
954 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_INTERFACE, 0);
959 nl80211_send(req, nl80211_get_frequency_info_cb, buf);
963 /* failed, try to find frequency from hostapd info */
965 (res = nl80211_hostapd_info(ifname)) &&
966 (channel = nl80211_getval(NULL, res, "channel")))
969 *buf = nl80211_channel2freq(chn, nl80211_getval(NULL, res, "hw_mode"));
973 /* failed, try to find frequency from scan results */
976 res = nl80211_phy2ifname(ifname);
977 req = nl80211_msg(res ? res : ifname, NL80211_CMD_GET_SCAN,
982 nl80211_send(req, nl80211_get_frequency_scan_cb, buf);
988 return (*buf == 0) ? -1 : 0;
991 int nl80211_get_channel(const char *ifname, int *buf)
993 if (!nl80211_get_frequency(ifname, buf))
995 *buf = nl80211_freq2channel(*buf);
1003 int nl80211_get_txpower(const char *ifname, int *buf)
1007 char path[PATH_MAX];
1009 res = nl80211_ifname2phy(ifname);
1010 snprintf(path, sizeof(path), "/sys/kernel/debug/ieee80211/%s/power",
1011 res ? res : ifname);
1013 if ((*buf = nl80211_readint(path)) > -1)
1017 return wext_get_txpower(ifname, buf);
1021 static int nl80211_fill_signal_cb(struct nl_msg *msg, void *arg)
1025 struct nl80211_rssi_rate *rr = arg;
1026 struct nlattr **attr = nl80211_parse(msg);
1027 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1028 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1030 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1031 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1032 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
1033 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
1034 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1035 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1036 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1037 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1038 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
1039 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
1040 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
1043 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1044 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1045 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1046 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1047 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1050 if (attr[NL80211_ATTR_STA_INFO])
1052 if (!nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1053 attr[NL80211_ATTR_STA_INFO], stats_policy))
1055 if (sinfo[NL80211_STA_INFO_SIGNAL])
1057 dbm = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1058 rr->rssi = rr->rssi ? (int8_t)((rr->rssi + dbm) / 2) : dbm;
1061 if (sinfo[NL80211_STA_INFO_TX_BITRATE])
1063 if (!nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1064 sinfo[NL80211_STA_INFO_TX_BITRATE],
1067 if (rinfo[NL80211_RATE_INFO_BITRATE])
1069 mbit = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
1071 ? (int16_t)((rr->rate + mbit) / 2) : mbit;
1081 static void nl80211_fill_signal(const char *ifname, struct nl80211_rssi_rate *r)
1085 struct nl80211_msg_conveyor *req;
1090 if ((d = opendir("/sys/class/net")) != NULL)
1092 while ((de = readdir(d)) != NULL)
1094 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1095 (!de->d_name[strlen(ifname)] ||
1096 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1098 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1103 nl80211_send(req, nl80211_fill_signal_cb, r);
1113 int nl80211_get_bitrate(const char *ifname, int *buf)
1115 struct nl80211_rssi_rate rr;
1117 nl80211_fill_signal(ifname, &rr);
1121 *buf = (rr.rate * 100);
1128 int nl80211_get_signal(const char *ifname, int *buf)
1130 struct nl80211_rssi_rate rr;
1132 nl80211_fill_signal(ifname, &rr);
1143 static int nl80211_get_noise_cb(struct nl_msg *msg, void *arg)
1145 int8_t *noise = arg;
1146 struct nlattr **tb = nl80211_parse(msg);
1147 struct nlattr *si[NL80211_SURVEY_INFO_MAX + 1];
1149 static struct nla_policy sp[NL80211_SURVEY_INFO_MAX + 1] = {
1150 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
1151 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
1154 if (!tb[NL80211_ATTR_SURVEY_INFO])
1157 if (nla_parse_nested(si, NL80211_SURVEY_INFO_MAX,
1158 tb[NL80211_ATTR_SURVEY_INFO], sp))
1161 if (!si[NL80211_SURVEY_INFO_NOISE])
1164 if (!*noise || si[NL80211_SURVEY_INFO_IN_USE])
1165 *noise = (int8_t)nla_get_u8(si[NL80211_SURVEY_INFO_NOISE]);
1171 int nl80211_get_noise(const char *ifname, int *buf)
1174 struct nl80211_msg_conveyor *req;
1176 req = nl80211_msg(ifname, NL80211_CMD_GET_SURVEY, NLM_F_DUMP);
1181 nl80211_send(req, nl80211_get_noise_cb, &noise);
1194 int nl80211_get_quality(const char *ifname, int *buf)
1198 if (!nl80211_get_signal(ifname, &signal))
1200 /* A positive signal level is usually just a quality
1201 * value, pass through as-is */
1207 /* The cfg80211 wext compat layer assumes a signal range
1208 * of -110 dBm to -40 dBm, the quality value is derived
1209 * by adding 110 to the signal level */
1214 else if (signal > -40)
1217 *buf = (signal + 110);
1226 int nl80211_get_quality_max(const char *ifname, int *buf)
1228 /* The cfg80211 wext compat layer assumes a maximum
1235 int nl80211_get_encryption(const char *ifname, char *buf)
1240 struct iwinfo_crypto_entry *c = (struct iwinfo_crypto_entry *)buf;
1242 /* WPA supplicant */
1243 if ((res = nl80211_wpactl_info(ifname, "STATUS", NULL)) &&
1244 (val = nl80211_getval(NULL, res, "pairwise_cipher")))
1247 if (strstr(val, "WEP"))
1249 if (strstr(val, "WEP-40"))
1250 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1252 else if (strstr(val, "WEP-104"))
1253 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1256 c->group_ciphers = c->pair_ciphers;
1258 c->auth_suites |= IWINFO_KMGMT_NONE;
1259 c->auth_algs |= IWINFO_AUTH_OPEN; /* XXX: assumption */
1265 if (strstr(val, "TKIP"))
1266 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1268 else if (strstr(val, "CCMP"))
1269 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1271 else if (strstr(val, "NONE"))
1272 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1274 else if (strstr(val, "WEP-40"))
1275 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1277 else if (strstr(val, "WEP-104"))
1278 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1281 if ((val = nl80211_getval(NULL, res, "group_cipher")))
1283 if (strstr(val, "TKIP"))
1284 c->group_ciphers |= IWINFO_CIPHER_TKIP;
1286 else if (strstr(val, "CCMP"))
1287 c->group_ciphers |= IWINFO_CIPHER_CCMP;
1289 else if (strstr(val, "NONE"))
1290 c->group_ciphers |= IWINFO_CIPHER_NONE;
1292 else if (strstr(val, "WEP-40"))
1293 c->group_ciphers |= IWINFO_CIPHER_WEP40;
1295 else if (strstr(val, "WEP-104"))
1296 c->group_ciphers |= IWINFO_CIPHER_WEP104;
1300 if ((val = nl80211_getval(NULL, res, "key_mgmt")))
1302 if (strstr(val, "WPA2"))
1305 else if (strstr(val, "WPA"))
1309 if (strstr(val, "PSK"))
1310 c->auth_suites |= IWINFO_KMGMT_PSK;
1312 else if (strstr(val, "EAP") || strstr(val, "802.1X"))
1313 c->auth_suites |= IWINFO_KMGMT_8021x;
1315 else if (strstr(val, "NONE"))
1316 c->auth_suites |= IWINFO_KMGMT_NONE;
1319 c->enabled = (c->wpa_version && c->auth_suites) ? 1 : 0;
1326 else if ((res = nl80211_hostapd_info(ifname)))
1328 if ((val = nl80211_getval(ifname, res, "wpa")) != NULL)
1329 c->wpa_version = atoi(val);
1331 val = nl80211_getval(ifname, res, "wpa_key_mgmt");
1333 if (!val || strstr(val, "PSK"))
1334 c->auth_suites |= IWINFO_KMGMT_PSK;
1336 if (val && strstr(val, "EAP"))
1337 c->auth_suites |= IWINFO_KMGMT_8021x;
1339 if (val && strstr(val, "NONE"))
1340 c->auth_suites |= IWINFO_KMGMT_NONE;
1342 if ((val = nl80211_getval(ifname, res, "wpa_pairwise")) != NULL)
1344 if (strstr(val, "TKIP"))
1345 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1347 if (strstr(val, "CCMP"))
1348 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1350 if (strstr(val, "NONE"))
1351 c->pair_ciphers |= IWINFO_CIPHER_NONE;
1354 if ((val = nl80211_getval(ifname, res, "auth_algs")) != NULL)
1358 c->auth_algs |= IWINFO_AUTH_OPEN;
1362 c->auth_algs |= IWINFO_AUTH_SHARED;
1366 c->auth_algs |= IWINFO_AUTH_OPEN;
1367 c->auth_algs |= IWINFO_AUTH_SHARED;
1374 for (i = 0; i < 4; i++)
1376 snprintf(k, sizeof(k), "wep_key%d", i);
1378 if ((val = nl80211_getval(ifname, res, k)))
1380 if ((strlen(val) == 5) || (strlen(val) == 10))
1381 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1383 else if ((strlen(val) == 13) || (strlen(val) == 26))
1384 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1389 c->group_ciphers = c->pair_ciphers;
1390 c->enabled = (c->wpa_version || c->pair_ciphers) ? 1 : 0;
1399 static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
1401 struct nl80211_array_buf *arr = arg;
1402 struct iwinfo_assoclist_entry *e = arr->buf;
1403 struct nlattr **attr = nl80211_parse(msg);
1404 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1405 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
1407 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
1408 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
1409 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
1410 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
1411 [NL80211_STA_INFO_RX_BITRATE] = { .type = NLA_NESTED },
1412 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
1413 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1416 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
1417 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
1418 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
1419 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
1420 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
1423 /* advance to end of array */
1425 memset(e, 0, sizeof(*e));
1427 if (attr[NL80211_ATTR_MAC])
1428 memcpy(e->mac, nla_data(attr[NL80211_ATTR_MAC]), 6);
1430 if (attr[NL80211_ATTR_STA_INFO] &&
1431 !nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1432 attr[NL80211_ATTR_STA_INFO], stats_policy))
1434 if (sinfo[NL80211_STA_INFO_SIGNAL])
1435 e->signal = nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1437 if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
1438 e->inactive = nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]);
1440 if (sinfo[NL80211_STA_INFO_RX_PACKETS])
1441 e->rx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]);
1443 if (sinfo[NL80211_STA_INFO_TX_PACKETS])
1444 e->tx_packets = nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]);
1446 if (sinfo[NL80211_STA_INFO_RX_BITRATE] &&
1447 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1448 sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
1450 if (rinfo[NL80211_RATE_INFO_BITRATE])
1452 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1454 if (rinfo[NL80211_RATE_INFO_MCS])
1455 e->rx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1457 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1458 e->rx_rate.is_40mhz = 1;
1460 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1461 e->rx_rate.is_short_gi = 1;
1464 if (sinfo[NL80211_STA_INFO_TX_BITRATE] &&
1465 !nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
1466 sinfo[NL80211_STA_INFO_TX_BITRATE], rate_policy))
1468 if (rinfo[NL80211_RATE_INFO_BITRATE])
1470 nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100;
1472 if (rinfo[NL80211_RATE_INFO_MCS])
1473 e->tx_rate.mcs = nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]);
1475 if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
1476 e->tx_rate.is_40mhz = 1;
1478 if (rinfo[NL80211_RATE_INFO_SHORT_GI])
1479 e->tx_rate.is_short_gi = 1;
1483 e->noise = 0; /* filled in by caller */
1489 int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
1494 struct nl80211_msg_conveyor *req;
1495 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
1496 struct iwinfo_assoclist_entry *e;
1498 if ((d = opendir("/sys/class/net")) != NULL)
1500 while ((de = readdir(d)) != NULL)
1502 if (!strncmp(de->d_name, ifname, strlen(ifname)) &&
1503 (!de->d_name[strlen(ifname)] ||
1504 !strncmp(&de->d_name[strlen(ifname)], ".sta", 4)))
1506 req = nl80211_msg(de->d_name, NL80211_CMD_GET_STATION,
1511 nl80211_send(req, nl80211_get_assoclist_cb, &arr);
1519 if (!nl80211_get_noise(ifname, &noise))
1520 for (i = 0, e = arr.buf; i < arr.count; i++, e++)
1523 *len = (arr.count * sizeof(struct iwinfo_assoclist_entry));
1530 static int nl80211_get_txpwrlist_cb(struct nl_msg *msg, void *arg)
1533 int ch_cur, ch_cmp, bands_remain, freqs_remain;
1535 struct nlattr **attr = nl80211_parse(msg);
1536 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1537 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1538 struct nlattr *band, *freq;
1540 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1541 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1542 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1543 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1544 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1545 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1546 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1549 ch_cur = *dbm_max; /* value int* is initialized with channel by caller */
1552 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1554 nla_parse(bands, NL80211_BAND_ATTR_MAX, nla_data(band),
1555 nla_len(band), NULL);
1557 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
1559 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
1560 nla_data(freq), nla_len(freq), freq_policy);
1562 ch_cmp = nl80211_freq2channel(nla_get_u32(
1563 freqs[NL80211_FREQUENCY_ATTR_FREQ]));
1565 if ((!ch_cur || (ch_cmp == ch_cur)) &&
1566 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
1568 *dbm_max = (int)(0.01 * nla_get_u32(
1569 freqs[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
1579 int nl80211_get_txpwrlist(const char *ifname, char *buf, int *len)
1582 int dbm_max = -1, dbm_cur, dbm_cnt;
1583 struct nl80211_msg_conveyor *req;
1584 struct iwinfo_txpwrlist_entry entry;
1586 if (nl80211_get_channel(ifname, &ch_cur))
1589 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
1592 /* initialize the value pointer with channel for callback */
1595 nl80211_send(req, nl80211_get_txpwrlist_cb, &dbm_max);
1601 for (dbm_cur = 0, dbm_cnt = 0;
1603 dbm_cur++, dbm_cnt++)
1605 entry.dbm = dbm_cur;
1606 entry.mw = iwinfo_dbm2mw(dbm_cur);
1608 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1611 entry.dbm = dbm_max;
1612 entry.mw = iwinfo_dbm2mw(dbm_max);
1614 memcpy(&buf[dbm_cnt * sizeof(entry)], &entry, sizeof(entry));
1617 *len = dbm_cnt * sizeof(entry);
1624 static void nl80211_get_scancrypto(const char *spec,
1625 struct iwinfo_crypto_entry *c)
1627 if (strstr(spec, "WPA") || strstr(spec, "WEP"))
1631 if (strstr(spec, "WPA2-") && strstr(spec, "WPA-"))
1634 else if (strstr(spec, "WPA2"))
1637 else if (strstr(spec, "WPA"))
1640 else if (strstr(spec, "WEP"))
1641 c->auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1644 if (strstr(spec, "PSK"))
1645 c->auth_suites |= IWINFO_KMGMT_PSK;
1647 if (strstr(spec, "802.1X") || strstr(spec, "EAP"))
1648 c->auth_suites |= IWINFO_KMGMT_8021x;
1650 if (strstr(spec, "WPA-NONE"))
1651 c->auth_suites |= IWINFO_KMGMT_NONE;
1654 if (strstr(spec, "TKIP"))
1655 c->pair_ciphers |= IWINFO_CIPHER_TKIP;
1657 if (strstr(spec, "CCMP"))
1658 c->pair_ciphers |= IWINFO_CIPHER_CCMP;
1660 if (strstr(spec, "WEP-40"))
1661 c->pair_ciphers |= IWINFO_CIPHER_WEP40;
1663 if (strstr(spec, "WEP-104"))
1664 c->pair_ciphers |= IWINFO_CIPHER_WEP104;
1666 c->group_ciphers = c->pair_ciphers;
1675 struct nl80211_scanlist {
1676 struct iwinfo_scanlist_entry *e;
1681 static void nl80211_get_scanlist_ie(struct nlattr **bss,
1682 struct iwinfo_scanlist_entry *e)
1684 int ielen = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1685 unsigned char *ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1686 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
1688 while (ielen >= 2 && ielen >= ie[1])
1693 memcpy(e->ssid, ie + 2, min(ie[1], IWINFO_ESSID_MAX_SIZE));
1697 iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
1698 IWINFO_CIPHER_CCMP, IWINFO_KMGMT_8021x);
1701 case 221: /* Vendor */
1702 if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5] == 1)
1703 iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
1704 IWINFO_CIPHER_TKIP, IWINFO_KMGMT_PSK);
1713 static int nl80211_get_scanlist_cb(struct nl_msg *msg, void *arg)
1718 struct nl80211_scanlist *sl = arg;
1719 struct nlattr **tb = nl80211_parse(msg);
1720 struct nlattr *bss[NL80211_BSS_MAX + 1];
1722 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1723 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1724 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1725 [NL80211_BSS_BSSID] = { },
1726 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1727 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1728 [NL80211_BSS_INFORMATION_ELEMENTS] = { },
1729 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1730 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1731 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1732 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1733 [NL80211_BSS_BEACON_IES] = { },
1736 if (!tb[NL80211_ATTR_BSS] ||
1737 nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1739 !bss[NL80211_BSS_BSSID])
1744 if (bss[NL80211_BSS_CAPABILITY])
1745 caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1749 memset(sl->e, 0, sizeof(*sl->e));
1750 memcpy(sl->e->mac, nla_data(bss[NL80211_BSS_BSSID]), 6);
1753 sl->e->mode = IWINFO_OPMODE_ADHOC;
1755 sl->e->mode = IWINFO_OPMODE_MASTER;
1758 sl->e->crypto.enabled = 1;
1760 if (bss[NL80211_BSS_FREQUENCY])
1761 sl->e->channel = nl80211_freq2channel(nla_get_u32(
1762 bss[NL80211_BSS_FREQUENCY]));
1764 if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
1765 nl80211_get_scanlist_ie(bss, sl->e);
1767 if (bss[NL80211_BSS_SIGNAL_MBM])
1770 (uint8_t)((int32_t)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100);
1772 rssi = sl->e->signal - 0x100;
1776 else if (rssi > -40)
1779 sl->e->quality = (rssi + 110);
1780 sl->e->quality_max = 70;
1783 if (sl->e->crypto.enabled && !sl->e->crypto.wpa_version)
1785 sl->e->crypto.auth_algs = IWINFO_AUTH_OPEN | IWINFO_AUTH_SHARED;
1786 sl->e->crypto.pair_ciphers = IWINFO_CIPHER_WEP40 | IWINFO_CIPHER_WEP104;
1795 static int nl80211_get_scanlist_nl(const char *ifname, char *buf, int *len)
1797 struct nl80211_msg_conveyor *req;
1798 struct nl80211_scanlist sl = { .e = (struct iwinfo_scanlist_entry *)buf };
1800 req = nl80211_msg(ifname, NL80211_CMD_TRIGGER_SCAN, 0);
1803 nl80211_send(req, NULL, NULL);
1807 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS);
1809 req = nl80211_msg(ifname, NL80211_CMD_GET_SCAN, NLM_F_DUMP);
1812 nl80211_send(req, nl80211_get_scanlist_cb, &sl);
1816 *len = sl.len * sizeof(struct iwinfo_scanlist_entry);
1817 return *len ? 0 : -1;
1820 int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
1822 int freq, rssi, qmax, count;
1824 char ssid[128] = { 0 };
1825 char bssid[18] = { 0 };
1826 char cipher[256] = { 0 };
1828 /* Got a radioX pseudo interface, find some interface on it or create one */
1829 if (!strncmp(ifname, "radio", 5))
1831 /* Reuse existing interface */
1832 if ((res = nl80211_phy2ifname(ifname)) != NULL)
1834 return nl80211_get_scanlist(res, buf, len);
1837 /* Need to spawn a temporary iface for scanning */
1838 else if ((res = nl80211_ifadd(ifname)) != NULL)
1840 count = nl80211_get_scanlist(res, buf, len);
1846 struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
1848 /* WPA supplicant */
1849 if ((res = nl80211_wpactl_info(ifname, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1851 if ((res = nl80211_wpactl_info(ifname, "SCAN_RESULTS", NULL)))
1853 nl80211_get_quality_max(ifname, &qmax);
1855 /* skip header line */
1856 while (*res++ != '\n');
1860 while (sscanf(res, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1861 bssid, &freq, &rssi, cipher, ssid) > 0)
1864 e->mac[0] = strtol(&bssid[0], NULL, 16);
1865 e->mac[1] = strtol(&bssid[3], NULL, 16);
1866 e->mac[2] = strtol(&bssid[6], NULL, 16);
1867 e->mac[3] = strtol(&bssid[9], NULL, 16);
1868 e->mac[4] = strtol(&bssid[12], NULL, 16);
1869 e->mac[5] = strtol(&bssid[15], NULL, 16);
1872 memcpy(e->ssid, ssid, min(strlen(ssid), sizeof(e->ssid) - 1));
1874 /* Mode (assume master) */
1875 e->mode = IWINFO_OPMODE_MASTER;
1878 e->channel = nl80211_freq2channel(freq);
1886 /* The cfg80211 wext compat layer assumes a signal range
1887 * of -110 dBm to -40 dBm, the quality value is derived
1888 * by adding 110 to the signal level */
1891 else if (rssi > -40)
1894 e->quality = (rssi + 110);
1902 e->quality_max = qmax;
1905 nl80211_get_scancrypto(cipher, &e->crypto);
1907 /* advance to next line */
1908 while (*res && *res++ != '\n');
1913 memset(ssid, 0, sizeof(ssid));
1914 memset(bssid, 0, sizeof(bssid));
1915 memset(cipher, 0, sizeof(cipher));
1918 *len = count * sizeof(struct iwinfo_scanlist_entry);
1926 /* Got a temp interface, don't create yet another one */
1927 if (!strncmp(ifname, "tmp.", 4))
1929 if (!iwinfo_ifup(ifname))
1932 nl80211_get_scanlist_nl(ifname, buf, len);
1933 iwinfo_ifdown(ifname);
1937 /* Spawn a new scan interface */
1940 if (!(res = nl80211_ifadd(ifname)))
1943 if (!iwinfo_ifmac(res))
1946 /* if we can take the new interface up, the driver supports an
1947 * additional interface and there's no need to tear down the ap */
1948 if (iwinfo_ifup(res))
1950 nl80211_get_scanlist_nl(res, buf, len);
1954 /* driver cannot create secondary interface, take down ap
1956 else if (iwinfo_ifdown(ifname) && iwinfo_ifup(res))
1958 nl80211_get_scanlist_nl(res, buf, len);
1960 iwinfo_ifup(ifname);
1961 nl80211_hostapd_hup(ifname);
1973 static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
1975 int bands_remain, freqs_remain;
1977 struct nl80211_array_buf *arr = arg;
1978 struct iwinfo_freqlist_entry *e = arr->buf;
1980 struct nlattr **attr = nl80211_parse(msg);
1981 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
1982 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
1983 struct nlattr *band, *freq;
1985 static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1986 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1987 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1988 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1989 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1990 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1991 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1994 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
1996 nla_parse(bands, NL80211_BAND_ATTR_MAX,
1997 nla_data(band), nla_len(band), NULL);
1999 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS], freqs_remain)
2001 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2002 nla_data(freq), nla_len(freq), NULL);
2004 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ] ||
2005 freqs[NL80211_FREQUENCY_ATTR_DISABLED])
2008 e->mhz = nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]);
2009 e->channel = nl80211_freq2channel(e->mhz);
2012 freqs[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] ||
2013 freqs[NL80211_FREQUENCY_ATTR_NO_IBSS] ||
2014 freqs[NL80211_FREQUENCY_ATTR_RADAR]
2025 int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
2027 struct nl80211_msg_conveyor *req;
2028 struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
2030 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2033 nl80211_send(req, nl80211_get_freqlist_cb, &arr);
2039 *len = arr.count * sizeof(struct iwinfo_freqlist_entry);
2046 static int nl80211_get_country_cb(struct nl_msg *msg, void *arg)
2049 struct nlattr **attr = nl80211_parse(msg);
2051 if (attr[NL80211_ATTR_REG_ALPHA2])
2052 memcpy(buf, nla_data(attr[NL80211_ATTR_REG_ALPHA2]), 2);
2059 int nl80211_get_country(const char *ifname, char *buf)
2062 struct nl80211_msg_conveyor *req;
2064 req = nl80211_msg(ifname, NL80211_CMD_GET_REG, 0);
2067 nl80211_send(req, nl80211_get_country_cb, buf);
2077 int nl80211_get_countrylist(const char *ifname, char *buf, int *len)
2080 struct iwinfo_country_entry *e = (struct iwinfo_country_entry *)buf;
2081 const struct iwinfo_iso3166_label *l;
2083 for (l = IWINFO_ISO3166_NAMES, count = 0; l->iso3166; l++, e++, count++)
2085 e->iso3166 = l->iso3166;
2086 e->ccode[0] = (l->iso3166 / 256);
2087 e->ccode[1] = (l->iso3166 % 256);
2090 *len = (count * sizeof(struct iwinfo_country_entry));
2094 static int nl80211_get_hwmodelist_cb(struct nl_msg *msg, void *arg)
2097 int bands_remain, freqs_remain;
2099 struct nlattr **attr = nl80211_parse(msg);
2100 struct nlattr *bands[NL80211_BAND_ATTR_MAX + 1];
2101 struct nlattr *freqs[NL80211_FREQUENCY_ATTR_MAX + 1];
2102 struct nlattr *band, *freq;
2106 if (attr[NL80211_ATTR_WIPHY_BANDS])
2108 nla_for_each_nested(band, attr[NL80211_ATTR_WIPHY_BANDS], bands_remain)
2110 nla_parse(bands, NL80211_BAND_ATTR_MAX,
2111 nla_data(band), nla_len(band), NULL);
2113 if (bands[NL80211_BAND_ATTR_HT_CAPA])
2114 caps = nla_get_u16(bands[NL80211_BAND_ATTR_HT_CAPA]);
2116 /* Treat any nonzero capability as 11n */
2118 *modes |= IWINFO_80211_N;
2120 nla_for_each_nested(freq, bands[NL80211_BAND_ATTR_FREQS],
2123 nla_parse(freqs, NL80211_FREQUENCY_ATTR_MAX,
2124 nla_data(freq), nla_len(freq), NULL);
2126 if (!freqs[NL80211_FREQUENCY_ATTR_FREQ])
2129 if (nla_get_u32(freqs[NL80211_FREQUENCY_ATTR_FREQ]) < 2485)
2131 *modes |= IWINFO_80211_B;
2132 *modes |= IWINFO_80211_G;
2136 *modes |= IWINFO_80211_A;
2145 int nl80211_get_hwmodelist(const char *ifname, int *buf)
2147 struct nl80211_msg_conveyor *req;
2149 req = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, 0);
2152 nl80211_send(req, nl80211_get_hwmodelist_cb, buf);
2156 return *buf ? 0 : -1;
2159 int nl80211_get_mbssid_support(const char *ifname, int *buf)
2161 /* Test whether we can create another interface */
2162 char *nif = nl80211_ifadd(ifname);
2166 *buf = (iwinfo_ifmac(nif) && iwinfo_ifup(nif));
2177 int nl80211_get_hardware_id(const char *ifname, char *buf)
2182 /* Got a radioX pseudo interface, find some interface on it or create one */
2183 if (!strncmp(ifname, "radio", 5))
2185 /* Reuse existing interface */
2186 if ((res = nl80211_phy2ifname(ifname)) != NULL)
2188 rv = wext_get_hardware_id(res, buf);
2191 /* Need to spawn a temporary iface for finding IDs */
2192 else if ((res = nl80211_ifadd(ifname)) != NULL)
2194 rv = wext_get_hardware_id(res, buf);
2200 rv = wext_get_hardware_id(ifname, buf);
2203 /* Failed to obtain hardware IDs, search board config */
2206 rv = iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id *)buf);
2212 static const struct iwinfo_hardware_entry *
2213 nl80211_get_hardware_entry(const char *ifname)
2215 struct iwinfo_hardware_id id;
2217 if (nl80211_get_hardware_id(ifname, (char *)&id))
2220 return iwinfo_hardware(&id);
2223 int nl80211_get_hardware_name(const char *ifname, char *buf)
2225 const struct iwinfo_hardware_entry *hw;
2227 if (!(hw = nl80211_get_hardware_entry(ifname)))
2228 sprintf(buf, "Generic MAC80211");
2230 sprintf(buf, "%s %s", hw->vendor_name, hw->device_name);
2235 int nl80211_get_txpower_offset(const char *ifname, int *buf)
2237 const struct iwinfo_hardware_entry *hw;
2239 if (!(hw = nl80211_get_hardware_entry(ifname)))
2242 *buf = hw->txpower_offset;
2246 int nl80211_get_frequency_offset(const char *ifname, int *buf)
2248 const struct iwinfo_hardware_entry *hw;
2250 if (!(hw = nl80211_get_hardware_entry(ifname)))
2253 *buf = hw->frequency_offset;