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"
27 #define min(x, y) ((x) < (y)) ? (x) : (y)
29 static struct nl80211_state
*nls
= NULL
;
31 static void nl80211_close(void)
36 genl_family_put(nls
->nlctrl
);
39 genl_family_put(nls
->nl80211
);
42 nl_socket_free(nls
->nl_sock
);
45 nl_cache_free(nls
->nl_cache
);
52 static int nl80211_init(void)
58 nls
= malloc(sizeof(struct nl80211_state
));
64 memset(nls
, 0, sizeof(*nls
));
66 nls
->nl_sock
= nl_socket_alloc();
72 if (genl_connect(nls
->nl_sock
)) {
77 fd
= nl_socket_get_fd(nls
->nl_sock
);
78 if (fcntl(fd
, F_SETFD
, fcntl(fd
, F_GETFD
) | FD_CLOEXEC
) < 0) {
83 if (genl_ctrl_alloc_cache(nls
->nl_sock
, &nls
->nl_cache
)) {
88 nls
->nl80211
= genl_ctrl_search_by_name(nls
->nl_cache
, "nl80211");
94 nls
->nlctrl
= genl_ctrl_search_by_name(nls
->nl_cache
, "nlctrl");
109 static int nl80211_readint(const char *path
)
115 if ((fd
= open(path
, O_RDONLY
)) > -1)
117 if (read(fd
, buffer
, sizeof(buffer
)) > 0)
127 static int nl80211_msg_error(struct sockaddr_nl
*nla
,
128 struct nlmsgerr
*err
, void *arg
)
135 static int nl80211_msg_finish(struct nl_msg
*msg
, void *arg
)
142 static int nl80211_msg_ack(struct nl_msg
*msg
, void *arg
)
149 static int nl80211_msg_response(struct nl_msg
*msg
, void *arg
)
154 static void nl80211_free(struct nl80211_msg_conveyor
*cv
)
169 static struct nl80211_msg_conveyor
* nl80211_new(struct genl_family
*family
,
172 static struct nl80211_msg_conveyor cv
;
174 struct nl_msg
*req
= NULL
;
175 struct nl_cb
*cb
= NULL
;
181 cb
= nl_cb_alloc(NL_CB_DEFAULT
);
185 genlmsg_put(req
, 0, 0, genl_family_get_id(family
), 0, flags
, cmd
, 0);
203 static struct nl80211_msg_conveyor
* nl80211_ctl(int cmd
, int flags
)
205 if (nl80211_init() < 0)
208 return nl80211_new(nls
->nlctrl
, cmd
, flags
);
211 static struct nl80211_msg_conveyor
* nl80211_msg(const char *ifname
,
214 int ifidx
= -1, phyidx
= -1;
215 struct nl80211_msg_conveyor
*cv
;
217 if (nl80211_init() < 0)
220 if (!strncmp(ifname
, "phy", 3))
221 phyidx
= atoi(&ifname
[3]);
222 else if (!strncmp(ifname
, "radio", 5))
223 phyidx
= atoi(&ifname
[5]);
224 else if (!strncmp(ifname
, "mon.", 4))
225 ifidx
= if_nametoindex(&ifname
[4]);
227 ifidx
= if_nametoindex(ifname
);
229 if ((ifidx
< 0) && (phyidx
< 0))
232 cv
= nl80211_new(nls
->nl80211
, cmd
, flags
);
237 NLA_PUT_U32(cv
->msg
, NL80211_ATTR_IFINDEX
, ifidx
);
240 NLA_PUT_U32(cv
->msg
, NL80211_ATTR_WIPHY
, phyidx
);
249 static struct nl80211_msg_conveyor
* nl80211_send(
250 struct nl80211_msg_conveyor
*cv
,
251 int (*cb_func
)(struct nl_msg
*, void *), void *cb_arg
253 static struct nl80211_msg_conveyor rcv
;
257 nl_cb_set(cv
->cb
, NL_CB_VALID
, NL_CB_CUSTOM
, cb_func
, cb_arg
);
259 nl_cb_set(cv
->cb
, NL_CB_VALID
, NL_CB_CUSTOM
, nl80211_msg_response
, &rcv
);
261 if (nl_send_auto_complete(nls
->nl_sock
, cv
->msg
) < 0)
264 nl_cb_err(cv
->cb
, NL_CB_CUSTOM
, nl80211_msg_error
, &err
);
265 nl_cb_set(cv
->cb
, NL_CB_FINISH
, NL_CB_CUSTOM
, nl80211_msg_finish
, &err
);
266 nl_cb_set(cv
->cb
, NL_CB_ACK
, NL_CB_CUSTOM
, nl80211_msg_ack
, &err
);
269 nl_recvmsgs(nls
->nl_sock
, cv
->cb
);
280 static struct nlattr
** nl80211_parse(struct nl_msg
*msg
)
282 struct genlmsghdr
*gnlh
= nlmsg_data(nlmsg_hdr(msg
));
283 static struct nlattr
*attr
[NL80211_ATTR_MAX
+ 1];
285 nla_parse(attr
, NL80211_ATTR_MAX
, genlmsg_attrdata(gnlh
, 0),
286 genlmsg_attrlen(gnlh
, 0), NULL
);
292 static int nl80211_subscribe_cb(struct nl_msg
*msg
, void *arg
)
294 struct nl80211_group_conveyor
*cv
= arg
;
296 struct nlattr
**attr
= nl80211_parse(msg
);
297 struct nlattr
*mgrpinfo
[CTRL_ATTR_MCAST_GRP_MAX
+ 1];
301 if (!attr
[CTRL_ATTR_MCAST_GROUPS
])
304 nla_for_each_nested(mgrp
, attr
[CTRL_ATTR_MCAST_GROUPS
], mgrpidx
)
306 nla_parse(mgrpinfo
, CTRL_ATTR_MCAST_GRP_MAX
,
307 nla_data(mgrp
), nla_len(mgrp
), NULL
);
309 if (mgrpinfo
[CTRL_ATTR_MCAST_GRP_ID
] &&
310 mgrpinfo
[CTRL_ATTR_MCAST_GRP_NAME
] &&
311 !strncmp(nla_data(mgrpinfo
[CTRL_ATTR_MCAST_GRP_NAME
]),
312 cv
->name
, nla_len(mgrpinfo
[CTRL_ATTR_MCAST_GRP_NAME
])))
314 cv
->id
= nla_get_u32(mgrpinfo
[CTRL_ATTR_MCAST_GRP_ID
]);
322 static int nl80211_subscribe(const char *family
, const char *group
)
324 struct nl80211_group_conveyor cv
= { .name
= group
, .id
= -ENOENT
};
325 struct nl80211_msg_conveyor
*req
;
327 req
= nl80211_ctl(CTRL_CMD_GETFAMILY
, 0);
330 NLA_PUT_STRING(req
->msg
, CTRL_ATTR_FAMILY_NAME
, family
);
331 nl80211_send(req
, nl80211_subscribe_cb
, &cv
);
337 return nl_socket_add_membership(nls
->nl_sock
, cv
.id
);
341 static int nl80211_wait_cb(struct nl_msg
*msg
, void *arg
)
343 struct nl80211_event_conveyor
*cv
= arg
;
344 struct genlmsghdr
*gnlh
= nlmsg_data(nlmsg_hdr(msg
));
346 if (gnlh
->cmd
== cv
->wait
)
347 cv
->recv
= gnlh
->cmd
;
352 static int nl80211_wait_seq_check(struct nl_msg
*msg
, void *arg
)
357 static int nl80211_wait(const char *family
, const char *group
, int cmd
)
359 struct nl80211_event_conveyor cv
= { .wait
= cmd
};
362 if (nl80211_subscribe(family
, group
))
365 cb
= nl_cb_alloc(NL_CB_DEFAULT
);
370 nl_cb_set(cb
, NL_CB_SEQ_CHECK
, NL_CB_CUSTOM
, nl80211_wait_seq_check
, NULL
);
371 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, nl80211_wait_cb
, &cv
);
374 nl_recvmsgs(nls
->nl_sock
, cb
);
382 static int nl80211_freq2channel(int freq
)
386 else if (freq
< 2484)
387 return (freq
- 2407) / 5;
388 else if (freq
>= 4910 && freq
<= 4980)
389 return (freq
- 4000) / 5;
391 return (freq
- 5000) / 5;
394 static int nl80211_channel2freq(int channel
, const char *band
)
396 if (!band
|| band
[0] != 'a')
400 else if (channel
< 14)
401 return (channel
* 5) + 2407;
405 if (channel
>= 182 && channel
<= 196)
406 return (channel
* 5) + 4000;
408 return (channel
* 5) + 5000;
414 static char * nl80211_getval(const char *ifname
, const char *buf
, const char *key
)
417 char lkey
[64] = { 0 };
418 const char *ln
= buf
;
419 static char lval
[256] = { 0 };
421 int matched_if
= ifname
? 0 : 1;
424 for( i
= 0, len
= strlen(buf
); i
< len
; i
++ )
426 if (!lkey
[0] && (buf
[i
] == ' ' || buf
[i
] == '\t'))
430 else if (!lkey
[0] && (buf
[i
] == '='))
432 if ((&buf
[i
] - ln
) > 0)
433 memcpy(lkey
, ln
, min(sizeof(lkey
) - 1, &buf
[i
] - ln
));
435 else if (buf
[i
] == '\n')
439 memcpy(lval
, ln
+ strlen(lkey
) + 1,
440 min(sizeof(lval
) - 1, &buf
[i
] - ln
- strlen(lkey
) - 1));
442 if ((ifname
!= NULL
) &&
443 (!strcmp(lkey
, "interface") || !strcmp(lkey
, "bss")) )
445 matched_if
= !strcmp(lval
, ifname
);
447 else if (matched_if
&& !strcmp(lkey
, key
))
454 memset(lkey
, 0, sizeof(lkey
));
455 memset(lval
, 0, sizeof(lval
));
462 static int nl80211_ifname2phy_cb(struct nl_msg
*msg
, void *arg
)
465 struct nlattr
**attr
= nl80211_parse(msg
);
467 if (attr
[NL80211_ATTR_WIPHY_NAME
])
468 memcpy(buf
, nla_data(attr
[NL80211_ATTR_WIPHY_NAME
]),
469 nla_len(attr
[NL80211_ATTR_WIPHY_NAME
]));
476 static char * nl80211_ifname2phy(const char *ifname
)
478 static char phy
[32] = { 0 };
479 struct nl80211_msg_conveyor
*req
;
481 memset(phy
, 0, sizeof(phy
));
483 req
= nl80211_msg(ifname
, NL80211_CMD_GET_WIPHY
, 0);
486 nl80211_send(req
, nl80211_ifname2phy_cb
, phy
);
490 return phy
[0] ? phy
: NULL
;
493 static char * nl80211_phy2ifname(const char *ifname
)
495 int fd
, ifidx
= -1, cifidx
= -1, phyidx
= -1;
497 static char nif
[IFNAMSIZ
] = { 0 };
504 else if (!strncmp(ifname
, "phy", 3))
505 phyidx
= atoi(&ifname
[3]);
506 else if (!strncmp(ifname
, "radio", 5))
507 phyidx
= atoi(&ifname
[5]);
509 memset(nif
, 0, sizeof(nif
));
513 if ((d
= opendir("/sys/class/net")) != NULL
)
515 while ((e
= readdir(d
)) != NULL
)
517 snprintf(buffer
, sizeof(buffer
),
518 "/sys/class/net/%s/phy80211/index", e
->d_name
);
520 if (nl80211_readint(buffer
) == phyidx
)
522 snprintf(buffer
, sizeof(buffer
),
523 "/sys/class/net/%s/ifindex", e
->d_name
);
525 if ((cifidx
= nl80211_readint(buffer
)) >= 0 &&
526 ((ifidx
< 0) || (cifidx
< ifidx
)))
529 strncpy(nif
, e
->d_name
, sizeof(nif
));
538 return nif
[0] ? nif
: NULL
;
541 static int nl80211_get_mode_cb(struct nl_msg
*msg
, void *arg
)
544 struct nlattr
**tb
= nl80211_parse(msg
);
545 const int ifmodes
[NL80211_IFTYPE_MAX
+ 1] = {
546 IWINFO_OPMODE_UNKNOWN
, /* unspecified */
547 IWINFO_OPMODE_ADHOC
, /* IBSS */
548 IWINFO_OPMODE_CLIENT
, /* managed */
549 IWINFO_OPMODE_MASTER
, /* AP */
550 IWINFO_OPMODE_AP_VLAN
, /* AP/VLAN */
551 IWINFO_OPMODE_WDS
, /* WDS */
552 IWINFO_OPMODE_MONITOR
, /* monitor */
553 IWINFO_OPMODE_MESHPOINT
, /* mesh point */
554 IWINFO_OPMODE_P2P_CLIENT
, /* P2P-client */
555 IWINFO_OPMODE_P2P_GO
, /* P2P-GO */
558 if (tb
[NL80211_ATTR_IFTYPE
])
559 *mode
= ifmodes
[nla_get_u32(tb
[NL80211_ATTR_IFTYPE
])];
565 static int nl80211_get_mode(const char *ifname
, int *buf
)
568 struct nl80211_msg_conveyor
*req
;
570 res
= nl80211_phy2ifname(ifname
);
571 req
= nl80211_msg(res
? res
: ifname
, NL80211_CMD_GET_INTERFACE
, 0);
572 *buf
= IWINFO_OPMODE_UNKNOWN
;
576 nl80211_send(req
, nl80211_get_mode_cb
, buf
);
580 return (*buf
== IWINFO_OPMODE_UNKNOWN
) ? -1 : 0;
583 static char * nl80211_hostapd_info(const char *ifname
)
587 char path
[32] = { 0 };
588 static char buf
[4096] = { 0 };
591 if (nl80211_get_mode(ifname
, &mode
))
594 if ((mode
== IWINFO_OPMODE_MASTER
|| mode
== IWINFO_OPMODE_AP_VLAN
) &&
595 (phy
= nl80211_ifname2phy(ifname
)) != NULL
)
597 snprintf(path
, sizeof(path
), "/var/run/hostapd-%s.conf", phy
);
599 if ((conf
= fopen(path
, "r")) != NULL
)
601 fread(buf
, sizeof(buf
) - 1, 1, conf
);
611 static inline int nl80211_wpactl_recv(int sock
, char *buf
, int blen
)
614 struct timeval tv
= { 2, 0 };
619 memset(buf
, 0, blen
);
622 if (select(sock
+ 1, &rfds
, NULL
, NULL
, &tv
) < 0)
625 if (!FD_ISSET(sock
, &rfds
))
628 return recv(sock
, buf
, blen
, 0);
631 static char * nl80211_wpactl_info(const char *ifname
, const char *cmd
,
637 size_t remote_length
, local_length
;
638 static char buffer
[10240] = { 0 };
640 struct sockaddr_un local
= { 0 };
641 struct sockaddr_un remote
= { 0 };
644 sock
= socket(PF_UNIX
, SOCK_DGRAM
, 0);
648 remote
.sun_family
= AF_UNIX
;
649 remote_length
= sizeof(remote
.sun_family
) + sprintf(remote
.sun_path
,
650 "/var/run/wpa_supplicant-%s/%s", ifname
, ifname
);
652 if (fcntl(sock
, F_SETFD
, fcntl(sock
, F_GETFD
) | FD_CLOEXEC
) < 0)
655 if (connect(sock
, (struct sockaddr
*) &remote
, remote_length
))
657 remote_length
= sizeof(remote
.sun_family
) + sprintf(remote
.sun_path
,
658 "/var/run/wpa_supplicant/%s", ifname
);
660 if (connect(sock
, (struct sockaddr
*) &remote
, remote_length
))
664 local
.sun_family
= AF_UNIX
;
665 local_length
= sizeof(local
.sun_family
) +
666 sprintf(local
.sun_path
, "/var/run/iwinfo-%s-%d", ifname
, getpid());
668 if (bind(sock
, (struct sockaddr
*) &local
, local_length
))
674 send(sock
, "ATTACH", 6, 0);
676 if (nl80211_wpactl_recv(sock
, buffer
, sizeof(buffer
)-1) <= 0)
681 send(sock
, cmd
, strlen(cmd
), 0);
683 /* we might have to scan up to 72 channels / 256ms per channel */
684 /* this makes up to 18.5s hence 10 tries */
685 while( numtry
++ < 10 )
689 /* make sure there is a terminating nul byte */
690 if (nl80211_wpactl_recv(sock
, buffer
, sizeof(buffer
)-1) <= 0)
698 if ((!event
&& buffer
[0] != '<') || (event
&& strstr(buffer
, event
)))
701 /* there may be more than max(numtry) BSS-ADDED events */
702 /* ignore them similar to wpa_cli */
703 if (buffer
[0] == '<' &&
704 (bracket
=strchr(buffer
,'>')) != NULL
&&
705 strncmp(bracket
+1,"CTRL-EVENT-BSS-ADDED",20) == 0)
714 if (local
.sun_family
)
715 unlink(local
.sun_path
);
720 static char * nl80211_ifadd(const char *ifname
)
724 static char nif
[IFNAMSIZ
] = { 0 };
725 struct nl80211_msg_conveyor
*req
, *res
;
727 req
= nl80211_msg(ifname
, NL80211_CMD_NEW_INTERFACE
, 0);
730 snprintf(nif
, sizeof(nif
), "tmp.%s", ifname
);
732 NLA_PUT_STRING(req
->msg
, NL80211_ATTR_IFNAME
, nif
);
733 NLA_PUT_U32(req
->msg
, NL80211_ATTR_IFTYPE
, NL80211_IFTYPE_STATION
);
735 nl80211_send(req
, NULL
, NULL
);
746 static void nl80211_ifdel(const char *ifname
)
748 struct nl80211_msg_conveyor
*req
;
750 req
= nl80211_msg(ifname
, NL80211_CMD_DEL_INTERFACE
, 0);
753 NLA_PUT_STRING(req
->msg
, NL80211_ATTR_IFNAME
, ifname
);
755 nl80211_send(req
, NULL
, NULL
);
762 static void nl80211_hostapd_hup(const char *ifname
)
766 char *phy
= nl80211_ifname2phy(ifname
);
770 snprintf(buf
, sizeof(buf
), "/var/run/wifi-%s.pid", phy
);
771 if ((fd
= open(buf
, O_RDONLY
)) > 0)
773 if (read(fd
, buf
, sizeof(buf
)) > 0)
785 static int nl80211_probe(const char *ifname
)
787 return !!nl80211_ifname2phy(ifname
);
790 struct nl80211_ssid_bssid
{
792 unsigned char bssid
[7];
795 static int nl80211_get_ssid_bssid_cb(struct nl_msg
*msg
, void *arg
)
799 struct nl80211_ssid_bssid
*sb
= arg
;
800 struct nlattr
**tb
= nl80211_parse(msg
);
801 struct nlattr
*bss
[NL80211_BSS_MAX
+ 1];
803 static struct nla_policy bss_policy
[NL80211_BSS_MAX
+ 1] = {
804 [NL80211_BSS_INFORMATION_ELEMENTS
] = { },
805 [NL80211_BSS_STATUS
] = { .type
= NLA_U32
},
808 if (!tb
[NL80211_ATTR_BSS
] ||
809 nla_parse_nested(bss
, NL80211_BSS_MAX
, tb
[NL80211_ATTR_BSS
],
811 !bss
[NL80211_BSS_BSSID
] ||
812 !bss
[NL80211_BSS_STATUS
] ||
813 !bss
[NL80211_BSS_INFORMATION_ELEMENTS
])
818 switch (nla_get_u32(bss
[NL80211_BSS_STATUS
]))
820 case NL80211_BSS_STATUS_ASSOCIATED
:
821 case NL80211_BSS_STATUS_AUTHENTICATED
:
822 case NL80211_BSS_STATUS_IBSS_JOINED
:
826 ie
= nla_data(bss
[NL80211_BSS_INFORMATION_ELEMENTS
]);
827 ielen
= nla_len(bss
[NL80211_BSS_INFORMATION_ELEMENTS
]);
829 while (ielen
>= 2 && ielen
>= ie
[1])
833 memcpy(sb
->ssid
, ie
+ 2, min(ie
[1], IWINFO_ESSID_MAX_SIZE
));
844 memcpy(sb
->bssid
+ 1, nla_data(bss
[NL80211_BSS_BSSID
]), 6);
853 static int nl80211_get_ssid(const char *ifname
, char *buf
)
856 struct nl80211_msg_conveyor
*req
;
857 struct nl80211_ssid_bssid sb
;
859 /* try to find ssid from scan dump results */
860 res
= nl80211_phy2ifname(ifname
);
861 req
= nl80211_msg(res
? res
: ifname
, NL80211_CMD_GET_SCAN
, NLM_F_DUMP
);
868 nl80211_send(req
, nl80211_get_ssid_bssid_cb
, &sb
);
872 /* failed, try to find from hostapd info */
874 (res
= nl80211_hostapd_info(ifname
)) &&
875 (res
= nl80211_getval(ifname
, res
, "ssid")))
877 memcpy(buf
, res
, strlen(res
));
880 return (*buf
== 0) ? -1 : 0;
883 static int nl80211_get_bssid(const char *ifname
, char *buf
)
886 struct nl80211_msg_conveyor
*req
;
887 struct nl80211_ssid_bssid sb
;
889 /* try to find bssid from scan dump results */
890 res
= nl80211_phy2ifname(ifname
);
891 req
= nl80211_msg(res
? res
: ifname
, NL80211_CMD_GET_SCAN
, NLM_F_DUMP
);
898 nl80211_send(req
, nl80211_get_ssid_bssid_cb
, &sb
);
902 /* failed, try to find mac from hostapd info */
903 if ((sb
.bssid
[0] == 0) &&
904 (res
= nl80211_hostapd_info(ifname
)) &&
905 (res
= nl80211_getval(ifname
, res
, "bssid")))
908 sb
.bssid
[1] = strtol(&res
[0], NULL
, 16);
909 sb
.bssid
[2] = strtol(&res
[3], NULL
, 16);
910 sb
.bssid
[3] = strtol(&res
[6], NULL
, 16);
911 sb
.bssid
[4] = strtol(&res
[9], NULL
, 16);
912 sb
.bssid
[5] = strtol(&res
[12], NULL
, 16);
913 sb
.bssid
[6] = strtol(&res
[15], NULL
, 16);
918 sprintf(buf
, "%02X:%02X:%02X:%02X:%02X:%02X",
919 sb
.bssid
[1], sb
.bssid
[2], sb
.bssid
[3],
920 sb
.bssid
[4], sb
.bssid
[5], sb
.bssid
[6]);
929 static int nl80211_get_frequency_scan_cb(struct nl_msg
*msg
, void *arg
)
932 struct nlattr
**attr
= nl80211_parse(msg
);
933 struct nlattr
*binfo
[NL80211_BSS_MAX
+ 1];
935 static struct nla_policy bss_policy
[NL80211_BSS_MAX
+ 1] = {
936 [NL80211_BSS_FREQUENCY
] = { .type
= NLA_U32
},
937 [NL80211_BSS_STATUS
] = { .type
= NLA_U32
},
940 if (attr
[NL80211_ATTR_BSS
] &&
941 !nla_parse_nested(binfo
, NL80211_BSS_MAX
,
942 attr
[NL80211_ATTR_BSS
], bss_policy
))
944 if (binfo
[NL80211_BSS_STATUS
] && binfo
[NL80211_BSS_FREQUENCY
])
945 *freq
= nla_get_u32(binfo
[NL80211_BSS_FREQUENCY
]);
951 static int nl80211_get_frequency_info_cb(struct nl_msg
*msg
, void *arg
)
954 struct nlattr
**tb
= nl80211_parse(msg
);
956 if (tb
[NL80211_ATTR_WIPHY_FREQ
])
957 *freq
= nla_get_u32(tb
[NL80211_ATTR_WIPHY_FREQ
]);
962 static int nl80211_get_frequency(const char *ifname
, int *buf
)
966 struct nl80211_msg_conveyor
*req
;
968 /* try to find frequency from interface info */
969 res
= nl80211_phy2ifname(ifname
);
970 req
= nl80211_msg(res
? res
: ifname
, NL80211_CMD_GET_INTERFACE
, 0);
975 nl80211_send(req
, nl80211_get_frequency_info_cb
, buf
);
979 /* failed, try to find frequency from hostapd info */
981 (res
= nl80211_hostapd_info(ifname
)) &&
982 (channel
= nl80211_getval(NULL
, res
, "channel")))
985 *buf
= nl80211_channel2freq(chn
, nl80211_getval(NULL
, res
, "hw_mode"));
989 /* failed, try to find frequency from scan results */
992 res
= nl80211_phy2ifname(ifname
);
993 req
= nl80211_msg(res
? res
: ifname
, NL80211_CMD_GET_SCAN
,
998 nl80211_send(req
, nl80211_get_frequency_scan_cb
, buf
);
1004 return (*buf
== 0) ? -1 : 0;
1007 static int nl80211_get_channel(const char *ifname
, int *buf
)
1009 if (!nl80211_get_frequency(ifname
, buf
))
1011 *buf
= nl80211_freq2channel(*buf
);
1019 static int nl80211_get_txpower(const char *ifname
, int *buf
)
1023 char path
[PATH_MAX
];
1025 res
= nl80211_ifname2phy(ifname
);
1026 snprintf(path
, sizeof(path
), "/sys/kernel/debug/ieee80211/%s/power",
1027 res
? res
: ifname
);
1029 if ((*buf
= nl80211_readint(path
)) > -1)
1033 return wext_ops
.txpower(ifname
, buf
);
1037 static int nl80211_fill_signal_cb(struct nl_msg
*msg
, void *arg
)
1041 struct nl80211_rssi_rate
*rr
= arg
;
1042 struct nlattr
**attr
= nl80211_parse(msg
);
1043 struct nlattr
*sinfo
[NL80211_STA_INFO_MAX
+ 1];
1044 struct nlattr
*rinfo
[NL80211_RATE_INFO_MAX
+ 1];
1046 static struct nla_policy stats_policy
[NL80211_STA_INFO_MAX
+ 1] = {
1047 [NL80211_STA_INFO_INACTIVE_TIME
] = { .type
= NLA_U32
},
1048 [NL80211_STA_INFO_RX_BYTES
] = { .type
= NLA_U32
},
1049 [NL80211_STA_INFO_TX_BYTES
] = { .type
= NLA_U32
},
1050 [NL80211_STA_INFO_RX_PACKETS
] = { .type
= NLA_U32
},
1051 [NL80211_STA_INFO_TX_PACKETS
] = { .type
= NLA_U32
},
1052 [NL80211_STA_INFO_SIGNAL
] = { .type
= NLA_U8
},
1053 [NL80211_STA_INFO_TX_BITRATE
] = { .type
= NLA_NESTED
},
1054 [NL80211_STA_INFO_LLID
] = { .type
= NLA_U16
},
1055 [NL80211_STA_INFO_PLID
] = { .type
= NLA_U16
},
1056 [NL80211_STA_INFO_PLINK_STATE
] = { .type
= NLA_U8
},
1059 static struct nla_policy rate_policy
[NL80211_RATE_INFO_MAX
+ 1] = {
1060 [NL80211_RATE_INFO_BITRATE
] = { .type
= NLA_U16
},
1061 [NL80211_RATE_INFO_MCS
] = { .type
= NLA_U8
},
1062 [NL80211_RATE_INFO_40_MHZ_WIDTH
] = { .type
= NLA_FLAG
},
1063 [NL80211_RATE_INFO_SHORT_GI
] = { .type
= NLA_FLAG
},
1066 if (attr
[NL80211_ATTR_STA_INFO
])
1068 if (!nla_parse_nested(sinfo
, NL80211_STA_INFO_MAX
,
1069 attr
[NL80211_ATTR_STA_INFO
], stats_policy
))
1071 if (sinfo
[NL80211_STA_INFO_SIGNAL
])
1073 dbm
= nla_get_u8(sinfo
[NL80211_STA_INFO_SIGNAL
]);
1074 rr
->rssi
= rr
->rssi
? (int8_t)((rr
->rssi
+ dbm
) / 2) : dbm
;
1077 if (sinfo
[NL80211_STA_INFO_TX_BITRATE
])
1079 if (!nla_parse_nested(rinfo
, NL80211_RATE_INFO_MAX
,
1080 sinfo
[NL80211_STA_INFO_TX_BITRATE
],
1083 if (rinfo
[NL80211_RATE_INFO_BITRATE
])
1085 mbit
= nla_get_u16(rinfo
[NL80211_RATE_INFO_BITRATE
]);
1087 ? (int16_t)((rr
->rate
+ mbit
) / 2) : mbit
;
1097 static void nl80211_fill_signal(const char *ifname
, struct nl80211_rssi_rate
*r
)
1101 struct nl80211_msg_conveyor
*req
;
1106 if ((d
= opendir("/sys/class/net")) != NULL
)
1108 while ((de
= readdir(d
)) != NULL
)
1110 if (!strncmp(de
->d_name
, ifname
, strlen(ifname
)) &&
1111 (!de
->d_name
[strlen(ifname
)] ||
1112 !strncmp(&de
->d_name
[strlen(ifname
)], ".sta", 4)))
1114 req
= nl80211_msg(de
->d_name
, NL80211_CMD_GET_STATION
,
1119 nl80211_send(req
, nl80211_fill_signal_cb
, r
);
1129 static int nl80211_get_bitrate(const char *ifname
, int *buf
)
1131 struct nl80211_rssi_rate rr
;
1133 nl80211_fill_signal(ifname
, &rr
);
1137 *buf
= (rr
.rate
* 100);
1144 static int nl80211_get_signal(const char *ifname
, int *buf
)
1146 struct nl80211_rssi_rate rr
;
1148 nl80211_fill_signal(ifname
, &rr
);
1159 static int nl80211_get_noise_cb(struct nl_msg
*msg
, void *arg
)
1161 int8_t *noise
= arg
;
1162 struct nlattr
**tb
= nl80211_parse(msg
);
1163 struct nlattr
*si
[NL80211_SURVEY_INFO_MAX
+ 1];
1165 static struct nla_policy sp
[NL80211_SURVEY_INFO_MAX
+ 1] = {
1166 [NL80211_SURVEY_INFO_FREQUENCY
] = { .type
= NLA_U32
},
1167 [NL80211_SURVEY_INFO_NOISE
] = { .type
= NLA_U8
},
1170 if (!tb
[NL80211_ATTR_SURVEY_INFO
])
1173 if (nla_parse_nested(si
, NL80211_SURVEY_INFO_MAX
,
1174 tb
[NL80211_ATTR_SURVEY_INFO
], sp
))
1177 if (!si
[NL80211_SURVEY_INFO_NOISE
])
1180 if (!*noise
|| si
[NL80211_SURVEY_INFO_IN_USE
])
1181 *noise
= (int8_t)nla_get_u8(si
[NL80211_SURVEY_INFO_NOISE
]);
1187 static int nl80211_get_noise(const char *ifname
, int *buf
)
1190 struct nl80211_msg_conveyor
*req
;
1192 req
= nl80211_msg(ifname
, NL80211_CMD_GET_SURVEY
, NLM_F_DUMP
);
1197 nl80211_send(req
, nl80211_get_noise_cb
, &noise
);
1210 static int nl80211_get_quality(const char *ifname
, int *buf
)
1214 if (!nl80211_get_signal(ifname
, &signal
))
1216 /* A positive signal level is usually just a quality
1217 * value, pass through as-is */
1223 /* The cfg80211 wext compat layer assumes a signal range
1224 * of -110 dBm to -40 dBm, the quality value is derived
1225 * by adding 110 to the signal level */
1230 else if (signal
> -40)
1233 *buf
= (signal
+ 110);
1242 static int nl80211_get_quality_max(const char *ifname
, int *buf
)
1244 /* The cfg80211 wext compat layer assumes a maximum
1251 static int nl80211_get_encryption(const char *ifname
, char *buf
)
1256 struct iwinfo_crypto_entry
*c
= (struct iwinfo_crypto_entry
*)buf
;
1258 /* WPA supplicant */
1259 if ((res
= nl80211_wpactl_info(ifname
, "STATUS", NULL
)) &&
1260 (val
= nl80211_getval(NULL
, res
, "pairwise_cipher")))
1263 if (strstr(val
, "WEP"))
1265 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 c
->group_ciphers
= c
->pair_ciphers
;
1274 c
->auth_suites
|= IWINFO_KMGMT_NONE
;
1275 c
->auth_algs
|= IWINFO_AUTH_OPEN
; /* XXX: assumption */
1281 if (strstr(val
, "TKIP"))
1282 c
->pair_ciphers
|= IWINFO_CIPHER_TKIP
;
1284 else if (strstr(val
, "CCMP"))
1285 c
->pair_ciphers
|= IWINFO_CIPHER_CCMP
;
1287 else if (strstr(val
, "NONE"))
1288 c
->pair_ciphers
|= IWINFO_CIPHER_NONE
;
1290 else if (strstr(val
, "WEP-40"))
1291 c
->pair_ciphers
|= IWINFO_CIPHER_WEP40
;
1293 else if (strstr(val
, "WEP-104"))
1294 c
->pair_ciphers
|= IWINFO_CIPHER_WEP104
;
1297 if ((val
= nl80211_getval(NULL
, res
, "group_cipher")))
1299 if (strstr(val
, "TKIP"))
1300 c
->group_ciphers
|= IWINFO_CIPHER_TKIP
;
1302 else if (strstr(val
, "CCMP"))
1303 c
->group_ciphers
|= IWINFO_CIPHER_CCMP
;
1305 else if (strstr(val
, "NONE"))
1306 c
->group_ciphers
|= IWINFO_CIPHER_NONE
;
1308 else if (strstr(val
, "WEP-40"))
1309 c
->group_ciphers
|= IWINFO_CIPHER_WEP40
;
1311 else if (strstr(val
, "WEP-104"))
1312 c
->group_ciphers
|= IWINFO_CIPHER_WEP104
;
1316 if ((val
= nl80211_getval(NULL
, res
, "key_mgmt")))
1318 if (strstr(val
, "WPA2"))
1321 else if (strstr(val
, "WPA"))
1325 if (strstr(val
, "PSK"))
1326 c
->auth_suites
|= IWINFO_KMGMT_PSK
;
1328 else if (strstr(val
, "EAP") || strstr(val
, "802.1X"))
1329 c
->auth_suites
|= IWINFO_KMGMT_8021x
;
1331 else if (strstr(val
, "NONE"))
1332 c
->auth_suites
|= IWINFO_KMGMT_NONE
;
1335 c
->enabled
= (c
->wpa_version
&& c
->auth_suites
) ? 1 : 0;
1342 else if ((res
= nl80211_hostapd_info(ifname
)))
1344 if ((val
= nl80211_getval(ifname
, res
, "wpa")) != NULL
)
1345 c
->wpa_version
= atoi(val
);
1347 val
= nl80211_getval(ifname
, res
, "wpa_key_mgmt");
1349 if (!val
|| strstr(val
, "PSK"))
1350 c
->auth_suites
|= IWINFO_KMGMT_PSK
;
1352 if (val
&& strstr(val
, "EAP"))
1353 c
->auth_suites
|= IWINFO_KMGMT_8021x
;
1355 if (val
&& strstr(val
, "NONE"))
1356 c
->auth_suites
|= IWINFO_KMGMT_NONE
;
1358 if ((val
= nl80211_getval(ifname
, res
, "wpa_pairwise")) != NULL
)
1360 if (strstr(val
, "TKIP"))
1361 c
->pair_ciphers
|= IWINFO_CIPHER_TKIP
;
1363 if (strstr(val
, "CCMP"))
1364 c
->pair_ciphers
|= IWINFO_CIPHER_CCMP
;
1366 if (strstr(val
, "NONE"))
1367 c
->pair_ciphers
|= IWINFO_CIPHER_NONE
;
1370 if ((val
= nl80211_getval(ifname
, res
, "auth_algs")) != NULL
)
1374 c
->auth_algs
|= IWINFO_AUTH_OPEN
;
1378 c
->auth_algs
|= IWINFO_AUTH_SHARED
;
1382 c
->auth_algs
|= IWINFO_AUTH_OPEN
;
1383 c
->auth_algs
|= IWINFO_AUTH_SHARED
;
1390 for (i
= 0; i
< 4; i
++)
1392 snprintf(k
, sizeof(k
), "wep_key%d", i
);
1394 if ((val
= nl80211_getval(ifname
, res
, k
)))
1396 if ((strlen(val
) == 5) || (strlen(val
) == 10))
1397 c
->pair_ciphers
|= IWINFO_CIPHER_WEP40
;
1399 else if ((strlen(val
) == 13) || (strlen(val
) == 26))
1400 c
->pair_ciphers
|= IWINFO_CIPHER_WEP104
;
1405 c
->group_ciphers
= c
->pair_ciphers
;
1406 c
->enabled
= (c
->wpa_version
|| c
->pair_ciphers
) ? 1 : 0;
1414 static int nl80211_get_phyname(const char *ifname
, char *buf
)
1418 name
= nl80211_ifname2phy(ifname
);
1425 else if ((name
= nl80211_phy2ifname(ifname
)) != NULL
)
1427 name
= nl80211_ifname2phy(name
);
1431 strcpy(buf
, ifname
);
1440 static int nl80211_get_assoclist_cb(struct nl_msg
*msg
, void *arg
)
1442 struct nl80211_array_buf
*arr
= arg
;
1443 struct iwinfo_assoclist_entry
*e
= arr
->buf
;
1444 struct nlattr
**attr
= nl80211_parse(msg
);
1445 struct nlattr
*sinfo
[NL80211_STA_INFO_MAX
+ 1];
1446 struct nlattr
*rinfo
[NL80211_RATE_INFO_MAX
+ 1];
1448 static struct nla_policy stats_policy
[NL80211_STA_INFO_MAX
+ 1] = {
1449 [NL80211_STA_INFO_INACTIVE_TIME
] = { .type
= NLA_U32
},
1450 [NL80211_STA_INFO_RX_PACKETS
] = { .type
= NLA_U32
},
1451 [NL80211_STA_INFO_TX_PACKETS
] = { .type
= NLA_U32
},
1452 [NL80211_STA_INFO_RX_BITRATE
] = { .type
= NLA_NESTED
},
1453 [NL80211_STA_INFO_TX_BITRATE
] = { .type
= NLA_NESTED
},
1454 [NL80211_STA_INFO_SIGNAL
] = { .type
= NLA_U8
},
1457 static struct nla_policy rate_policy
[NL80211_RATE_INFO_MAX
+ 1] = {
1458 [NL80211_RATE_INFO_BITRATE
] = { .type
= NLA_U16
},
1459 [NL80211_RATE_INFO_MCS
] = { .type
= NLA_U8
},
1460 [NL80211_RATE_INFO_40_MHZ_WIDTH
] = { .type
= NLA_FLAG
},
1461 [NL80211_RATE_INFO_SHORT_GI
] = { .type
= NLA_FLAG
},
1464 /* advance to end of array */
1466 memset(e
, 0, sizeof(*e
));
1468 if (attr
[NL80211_ATTR_MAC
])
1469 memcpy(e
->mac
, nla_data(attr
[NL80211_ATTR_MAC
]), 6);
1471 if (attr
[NL80211_ATTR_STA_INFO
] &&
1472 !nla_parse_nested(sinfo
, NL80211_STA_INFO_MAX
,
1473 attr
[NL80211_ATTR_STA_INFO
], stats_policy
))
1475 if (sinfo
[NL80211_STA_INFO_SIGNAL
])
1476 e
->signal
= nla_get_u8(sinfo
[NL80211_STA_INFO_SIGNAL
]);
1478 if (sinfo
[NL80211_STA_INFO_INACTIVE_TIME
])
1479 e
->inactive
= nla_get_u32(sinfo
[NL80211_STA_INFO_INACTIVE_TIME
]);
1481 if (sinfo
[NL80211_STA_INFO_RX_PACKETS
])
1482 e
->rx_packets
= nla_get_u32(sinfo
[NL80211_STA_INFO_RX_PACKETS
]);
1484 if (sinfo
[NL80211_STA_INFO_TX_PACKETS
])
1485 e
->tx_packets
= nla_get_u32(sinfo
[NL80211_STA_INFO_TX_PACKETS
]);
1487 if (sinfo
[NL80211_STA_INFO_RX_BITRATE
] &&
1488 !nla_parse_nested(rinfo
, NL80211_RATE_INFO_MAX
,
1489 sinfo
[NL80211_STA_INFO_RX_BITRATE
], rate_policy
))
1491 if (rinfo
[NL80211_RATE_INFO_BITRATE
])
1493 nla_get_u16(rinfo
[NL80211_RATE_INFO_BITRATE
]) * 100;
1495 if (rinfo
[NL80211_RATE_INFO_MCS
])
1496 e
->rx_rate
.mcs
= nla_get_u8(rinfo
[NL80211_RATE_INFO_MCS
]);
1498 if (rinfo
[NL80211_RATE_INFO_40_MHZ_WIDTH
])
1499 e
->rx_rate
.is_40mhz
= 1;
1501 if (rinfo
[NL80211_RATE_INFO_SHORT_GI
])
1502 e
->rx_rate
.is_short_gi
= 1;
1505 if (sinfo
[NL80211_STA_INFO_TX_BITRATE
] &&
1506 !nla_parse_nested(rinfo
, NL80211_RATE_INFO_MAX
,
1507 sinfo
[NL80211_STA_INFO_TX_BITRATE
], rate_policy
))
1509 if (rinfo
[NL80211_RATE_INFO_BITRATE
])
1511 nla_get_u16(rinfo
[NL80211_RATE_INFO_BITRATE
]) * 100;
1513 if (rinfo
[NL80211_RATE_INFO_MCS
])
1514 e
->tx_rate
.mcs
= nla_get_u8(rinfo
[NL80211_RATE_INFO_MCS
]);
1516 if (rinfo
[NL80211_RATE_INFO_40_MHZ_WIDTH
])
1517 e
->tx_rate
.is_40mhz
= 1;
1519 if (rinfo
[NL80211_RATE_INFO_SHORT_GI
])
1520 e
->tx_rate
.is_short_gi
= 1;
1524 e
->noise
= 0; /* filled in by caller */
1530 static int nl80211_get_assoclist(const char *ifname
, char *buf
, int *len
)
1535 struct nl80211_msg_conveyor
*req
;
1536 struct nl80211_array_buf arr
= { .buf
= buf
, .count
= 0 };
1537 struct iwinfo_assoclist_entry
*e
;
1539 if ((d
= opendir("/sys/class/net")) != NULL
)
1541 while ((de
= readdir(d
)) != NULL
)
1543 if (!strncmp(de
->d_name
, ifname
, strlen(ifname
)) &&
1544 (!de
->d_name
[strlen(ifname
)] ||
1545 !strncmp(&de
->d_name
[strlen(ifname
)], ".sta", 4)))
1547 req
= nl80211_msg(de
->d_name
, NL80211_CMD_GET_STATION
,
1552 nl80211_send(req
, nl80211_get_assoclist_cb
, &arr
);
1560 if (!nl80211_get_noise(ifname
, &noise
))
1561 for (i
= 0, e
= arr
.buf
; i
< arr
.count
; i
++, e
++)
1564 *len
= (arr
.count
* sizeof(struct iwinfo_assoclist_entry
));
1571 static int nl80211_get_txpwrlist_cb(struct nl_msg
*msg
, void *arg
)
1574 int ch_cur
, ch_cmp
, bands_remain
, freqs_remain
;
1576 struct nlattr
**attr
= nl80211_parse(msg
);
1577 struct nlattr
*bands
[NL80211_BAND_ATTR_MAX
+ 1];
1578 struct nlattr
*freqs
[NL80211_FREQUENCY_ATTR_MAX
+ 1];
1579 struct nlattr
*band
, *freq
;
1581 static struct nla_policy freq_policy
[NL80211_FREQUENCY_ATTR_MAX
+ 1] = {
1582 [NL80211_FREQUENCY_ATTR_FREQ
] = { .type
= NLA_U32
},
1583 [NL80211_FREQUENCY_ATTR_DISABLED
] = { .type
= NLA_FLAG
},
1584 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN
] = { .type
= NLA_FLAG
},
1585 [NL80211_FREQUENCY_ATTR_NO_IBSS
] = { .type
= NLA_FLAG
},
1586 [NL80211_FREQUENCY_ATTR_RADAR
] = { .type
= NLA_FLAG
},
1587 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER
] = { .type
= NLA_U32
},
1590 ch_cur
= *dbm_max
; /* value int* is initialized with channel by caller */
1593 nla_for_each_nested(band
, attr
[NL80211_ATTR_WIPHY_BANDS
], bands_remain
)
1595 nla_parse(bands
, NL80211_BAND_ATTR_MAX
, nla_data(band
),
1596 nla_len(band
), NULL
);
1598 nla_for_each_nested(freq
, bands
[NL80211_BAND_ATTR_FREQS
], freqs_remain
)
1600 nla_parse(freqs
, NL80211_FREQUENCY_ATTR_MAX
,
1601 nla_data(freq
), nla_len(freq
), freq_policy
);
1603 ch_cmp
= nl80211_freq2channel(nla_get_u32(
1604 freqs
[NL80211_FREQUENCY_ATTR_FREQ
]));
1606 if ((!ch_cur
|| (ch_cmp
== ch_cur
)) &&
1607 freqs
[NL80211_FREQUENCY_ATTR_MAX_TX_POWER
])
1609 *dbm_max
= (int)(0.01 * nla_get_u32(
1610 freqs
[NL80211_FREQUENCY_ATTR_MAX_TX_POWER
]));
1620 static int nl80211_get_txpwrlist(const char *ifname
, char *buf
, int *len
)
1623 int dbm_max
= -1, dbm_cur
, dbm_cnt
;
1624 struct nl80211_msg_conveyor
*req
;
1625 struct iwinfo_txpwrlist_entry entry
;
1627 if (nl80211_get_channel(ifname
, &ch_cur
))
1630 req
= nl80211_msg(ifname
, NL80211_CMD_GET_WIPHY
, 0);
1633 /* initialize the value pointer with channel for callback */
1636 nl80211_send(req
, nl80211_get_txpwrlist_cb
, &dbm_max
);
1642 for (dbm_cur
= 0, dbm_cnt
= 0;
1644 dbm_cur
++, dbm_cnt
++)
1646 entry
.dbm
= dbm_cur
;
1647 entry
.mw
= iwinfo_dbm2mw(dbm_cur
);
1649 memcpy(&buf
[dbm_cnt
* sizeof(entry
)], &entry
, sizeof(entry
));
1652 entry
.dbm
= dbm_max
;
1653 entry
.mw
= iwinfo_dbm2mw(dbm_max
);
1655 memcpy(&buf
[dbm_cnt
* sizeof(entry
)], &entry
, sizeof(entry
));
1658 *len
= dbm_cnt
* sizeof(entry
);
1665 static void nl80211_get_scancrypto(const char *spec
,
1666 struct iwinfo_crypto_entry
*c
)
1668 if (strstr(spec
, "WPA") || strstr(spec
, "WEP"))
1672 if (strstr(spec
, "WPA2-") && strstr(spec
, "WPA-"))
1675 else if (strstr(spec
, "WPA2"))
1678 else if (strstr(spec
, "WPA"))
1681 else if (strstr(spec
, "WEP"))
1682 c
->auth_algs
= IWINFO_AUTH_OPEN
| IWINFO_AUTH_SHARED
;
1685 if (strstr(spec
, "PSK"))
1686 c
->auth_suites
|= IWINFO_KMGMT_PSK
;
1688 if (strstr(spec
, "802.1X") || strstr(spec
, "EAP"))
1689 c
->auth_suites
|= IWINFO_KMGMT_8021x
;
1691 if (strstr(spec
, "WPA-NONE"))
1692 c
->auth_suites
|= IWINFO_KMGMT_NONE
;
1695 if (strstr(spec
, "TKIP"))
1696 c
->pair_ciphers
|= IWINFO_CIPHER_TKIP
;
1698 if (strstr(spec
, "CCMP"))
1699 c
->pair_ciphers
|= IWINFO_CIPHER_CCMP
;
1701 if (strstr(spec
, "WEP-40"))
1702 c
->pair_ciphers
|= IWINFO_CIPHER_WEP40
;
1704 if (strstr(spec
, "WEP-104"))
1705 c
->pair_ciphers
|= IWINFO_CIPHER_WEP104
;
1707 c
->group_ciphers
= c
->pair_ciphers
;
1716 struct nl80211_scanlist
{
1717 struct iwinfo_scanlist_entry
*e
;
1722 static void nl80211_get_scanlist_ie(struct nlattr
**bss
,
1723 struct iwinfo_scanlist_entry
*e
)
1725 int ielen
= nla_len(bss
[NL80211_BSS_INFORMATION_ELEMENTS
]);
1726 unsigned char *ie
= nla_data(bss
[NL80211_BSS_INFORMATION_ELEMENTS
]);
1727 static unsigned char ms_oui
[3] = { 0x00, 0x50, 0xf2 };
1730 while (ielen
>= 2 && ielen
>= ie
[1])
1735 len
= min(ie
[1], IWINFO_ESSID_MAX_SIZE
);
1736 memcpy(e
->ssid
, ie
+ 2, len
);
1741 iwinfo_parse_rsn(&e
->crypto
, ie
+ 2, ie
[1],
1742 IWINFO_CIPHER_CCMP
, IWINFO_KMGMT_8021x
);
1745 case 221: /* Vendor */
1746 if (ie
[1] >= 4 && !memcmp(ie
+ 2, ms_oui
, 3) && ie
[5] == 1)
1747 iwinfo_parse_rsn(&e
->crypto
, ie
+ 6, ie
[1] - 4,
1748 IWINFO_CIPHER_TKIP
, IWINFO_KMGMT_PSK
);
1757 static int nl80211_get_scanlist_cb(struct nl_msg
*msg
, void *arg
)
1762 struct nl80211_scanlist
*sl
= arg
;
1763 struct nlattr
**tb
= nl80211_parse(msg
);
1764 struct nlattr
*bss
[NL80211_BSS_MAX
+ 1];
1766 static struct nla_policy bss_policy
[NL80211_BSS_MAX
+ 1] = {
1767 [NL80211_BSS_TSF
] = { .type
= NLA_U64
},
1768 [NL80211_BSS_FREQUENCY
] = { .type
= NLA_U32
},
1769 [NL80211_BSS_BSSID
] = { },
1770 [NL80211_BSS_BEACON_INTERVAL
] = { .type
= NLA_U16
},
1771 [NL80211_BSS_CAPABILITY
] = { .type
= NLA_U16
},
1772 [NL80211_BSS_INFORMATION_ELEMENTS
] = { },
1773 [NL80211_BSS_SIGNAL_MBM
] = { .type
= NLA_U32
},
1774 [NL80211_BSS_SIGNAL_UNSPEC
] = { .type
= NLA_U8
},
1775 [NL80211_BSS_STATUS
] = { .type
= NLA_U32
},
1776 [NL80211_BSS_SEEN_MS_AGO
] = { .type
= NLA_U32
},
1777 [NL80211_BSS_BEACON_IES
] = { },
1780 if (!tb
[NL80211_ATTR_BSS
] ||
1781 nla_parse_nested(bss
, NL80211_BSS_MAX
, tb
[NL80211_ATTR_BSS
],
1783 !bss
[NL80211_BSS_BSSID
])
1788 if (bss
[NL80211_BSS_CAPABILITY
])
1789 caps
= nla_get_u16(bss
[NL80211_BSS_CAPABILITY
]);
1793 memset(sl
->e
, 0, sizeof(*sl
->e
));
1794 memcpy(sl
->e
->mac
, nla_data(bss
[NL80211_BSS_BSSID
]), 6);
1797 sl
->e
->mode
= IWINFO_OPMODE_ADHOC
;
1798 else if (caps
& (1<<0))
1799 sl
->e
->mode
= IWINFO_OPMODE_MASTER
;
1801 sl
->e
->mode
= IWINFO_OPMODE_MESHPOINT
;
1804 sl
->e
->crypto
.enabled
= 1;
1806 if (bss
[NL80211_BSS_FREQUENCY
])
1807 sl
->e
->channel
= nl80211_freq2channel(nla_get_u32(
1808 bss
[NL80211_BSS_FREQUENCY
]));
1810 if (bss
[NL80211_BSS_INFORMATION_ELEMENTS
])
1811 nl80211_get_scanlist_ie(bss
, sl
->e
);
1813 if (bss
[NL80211_BSS_SIGNAL_MBM
])
1816 (uint8_t)((int32_t)nla_get_u32(bss
[NL80211_BSS_SIGNAL_MBM
]) / 100);
1818 rssi
= sl
->e
->signal
- 0x100;
1822 else if (rssi
> -40)
1825 sl
->e
->quality
= (rssi
+ 110);
1826 sl
->e
->quality_max
= 70;
1829 if (sl
->e
->crypto
.enabled
&& !sl
->e
->crypto
.wpa_version
)
1831 sl
->e
->crypto
.auth_algs
= IWINFO_AUTH_OPEN
| IWINFO_AUTH_SHARED
;
1832 sl
->e
->crypto
.pair_ciphers
= IWINFO_CIPHER_WEP40
| IWINFO_CIPHER_WEP104
;
1841 static int nl80211_get_scanlist_nl(const char *ifname
, char *buf
, int *len
)
1843 struct nl80211_msg_conveyor
*req
;
1844 struct nl80211_scanlist sl
= { .e
= (struct iwinfo_scanlist_entry
*)buf
};
1846 req
= nl80211_msg(ifname
, NL80211_CMD_TRIGGER_SCAN
, 0);
1849 nl80211_send(req
, NULL
, NULL
);
1853 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS
);
1855 req
= nl80211_msg(ifname
, NL80211_CMD_GET_SCAN
, NLM_F_DUMP
);
1858 nl80211_send(req
, nl80211_get_scanlist_cb
, &sl
);
1862 *len
= sl
.len
* sizeof(struct iwinfo_scanlist_entry
);
1863 return *len
? 0 : -1;
1866 static int nl80211_get_scanlist(const char *ifname
, char *buf
, int *len
)
1868 int freq
, rssi
, qmax
, count
;
1870 char ssid
[128] = { 0 };
1871 char bssid
[18] = { 0 };
1872 char cipher
[256] = { 0 };
1874 /* Got a radioX pseudo interface, find some interface on it or create one */
1875 if (!strncmp(ifname
, "radio", 5))
1877 /* Reuse existing interface */
1878 if ((res
= nl80211_phy2ifname(ifname
)) != NULL
)
1880 return nl80211_get_scanlist(res
, buf
, len
);
1883 /* Need to spawn a temporary iface for scanning */
1884 else if ((res
= nl80211_ifadd(ifname
)) != NULL
)
1886 count
= nl80211_get_scanlist(res
, buf
, len
);
1892 struct iwinfo_scanlist_entry
*e
= (struct iwinfo_scanlist_entry
*)buf
;
1894 /* WPA supplicant */
1895 if ((res
= nl80211_wpactl_info(ifname
, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1897 if ((res
= nl80211_wpactl_info(ifname
, "SCAN_RESULTS", NULL
)))
1899 nl80211_get_quality_max(ifname
, &qmax
);
1906 /* skip log lines */
1911 /* skip header line */
1915 if (sscanf(res
, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1916 bssid
, &freq
, &rssi
, cipher
, ssid
) < 5)
1918 /* skip malformed lines */
1922 e
->mac
[0] = strtol(&bssid
[0], NULL
, 16);
1923 e
->mac
[1] = strtol(&bssid
[3], NULL
, 16);
1924 e
->mac
[2] = strtol(&bssid
[6], NULL
, 16);
1925 e
->mac
[3] = strtol(&bssid
[9], NULL
, 16);
1926 e
->mac
[4] = strtol(&bssid
[12], NULL
, 16);
1927 e
->mac
[5] = strtol(&bssid
[15], NULL
, 16);
1930 memcpy(e
->ssid
, ssid
, min(strlen(ssid
), sizeof(e
->ssid
) - 1));
1932 /* Mode (assume master) */
1933 if (strstr(cipher
,"[MESH]"))
1934 e
->mode
= IWINFO_OPMODE_MESHPOINT
;
1936 e
->mode
= IWINFO_OPMODE_MASTER
;
1939 e
->channel
= nl80211_freq2channel(freq
);
1947 /* The cfg80211 wext compat layer assumes a signal range
1948 * of -110 dBm to -40 dBm, the quality value is derived
1949 * by adding 110 to the signal level */
1952 else if (rssi
> -40)
1955 e
->quality
= (rssi
+ 110);
1963 e
->quality_max
= qmax
;
1966 nl80211_get_scancrypto(cipher
, &e
->crypto
);
1971 memset(ssid
, 0, sizeof(ssid
));
1972 memset(bssid
, 0, sizeof(bssid
));
1973 memset(cipher
, 0, sizeof(cipher
));
1976 /* advance to next line */
1977 while( *res
&& *res
++ != '\n' );
1981 *len
= count
* sizeof(struct iwinfo_scanlist_entry
);
1989 /* Got a temp interface, don't create yet another one */
1990 if (!strncmp(ifname
, "tmp.", 4))
1992 if (!iwinfo_ifup(ifname
))
1995 nl80211_get_scanlist_nl(ifname
, buf
, len
);
1996 iwinfo_ifdown(ifname
);
2000 /* Spawn a new scan interface */
2003 if (!(res
= nl80211_ifadd(ifname
)))
2006 if (!iwinfo_ifmac(res
))
2009 /* if we can take the new interface up, the driver supports an
2010 * additional interface and there's no need to tear down the ap */
2011 if (iwinfo_ifup(res
))
2013 nl80211_get_scanlist_nl(res
, buf
, len
);
2017 /* driver cannot create secondary interface, take down ap
2019 else if (iwinfo_ifdown(ifname
) && iwinfo_ifup(res
))
2021 nl80211_get_scanlist_nl(res
, buf
, len
);
2023 iwinfo_ifup(ifname
);
2024 nl80211_hostapd_hup(ifname
);
2036 static int nl80211_get_freqlist_cb(struct nl_msg
*msg
, void *arg
)
2038 int bands_remain
, freqs_remain
;
2040 struct nl80211_array_buf
*arr
= arg
;
2041 struct iwinfo_freqlist_entry
*e
= arr
->buf
;
2043 struct nlattr
**attr
= nl80211_parse(msg
);
2044 struct nlattr
*bands
[NL80211_BAND_ATTR_MAX
+ 1];
2045 struct nlattr
*freqs
[NL80211_FREQUENCY_ATTR_MAX
+ 1];
2046 struct nlattr
*band
, *freq
;
2048 static struct nla_policy freq_policy
[NL80211_FREQUENCY_ATTR_MAX
+ 1] = {
2049 [NL80211_FREQUENCY_ATTR_FREQ
] = { .type
= NLA_U32
},
2050 [NL80211_FREQUENCY_ATTR_DISABLED
] = { .type
= NLA_FLAG
},
2051 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN
] = { .type
= NLA_FLAG
},
2052 [NL80211_FREQUENCY_ATTR_NO_IBSS
] = { .type
= NLA_FLAG
},
2053 [NL80211_FREQUENCY_ATTR_RADAR
] = { .type
= NLA_FLAG
},
2054 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER
] = { .type
= NLA_U32
},
2057 nla_for_each_nested(band
, attr
[NL80211_ATTR_WIPHY_BANDS
], bands_remain
)
2059 nla_parse(bands
, NL80211_BAND_ATTR_MAX
,
2060 nla_data(band
), nla_len(band
), NULL
);
2062 nla_for_each_nested(freq
, bands
[NL80211_BAND_ATTR_FREQS
], freqs_remain
)
2064 nla_parse(freqs
, NL80211_FREQUENCY_ATTR_MAX
,
2065 nla_data(freq
), nla_len(freq
), NULL
);
2067 if (!freqs
[NL80211_FREQUENCY_ATTR_FREQ
] ||
2068 freqs
[NL80211_FREQUENCY_ATTR_DISABLED
])
2071 e
->mhz
= nla_get_u32(freqs
[NL80211_FREQUENCY_ATTR_FREQ
]);
2072 e
->channel
= nl80211_freq2channel(e
->mhz
);
2075 freqs
[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN
] ||
2076 freqs
[NL80211_FREQUENCY_ATTR_NO_IBSS
] ||
2077 freqs
[NL80211_FREQUENCY_ATTR_RADAR
]
2088 static int nl80211_get_freqlist(const char *ifname
, char *buf
, int *len
)
2090 struct nl80211_msg_conveyor
*req
;
2091 struct nl80211_array_buf arr
= { .buf
= buf
, .count
= 0 };
2093 req
= nl80211_msg(ifname
, NL80211_CMD_GET_WIPHY
, 0);
2096 nl80211_send(req
, nl80211_get_freqlist_cb
, &arr
);
2102 *len
= arr
.count
* sizeof(struct iwinfo_freqlist_entry
);
2109 static int nl80211_get_country_cb(struct nl_msg
*msg
, void *arg
)
2112 struct nlattr
**attr
= nl80211_parse(msg
);
2114 if (attr
[NL80211_ATTR_REG_ALPHA2
])
2115 memcpy(buf
, nla_data(attr
[NL80211_ATTR_REG_ALPHA2
]), 2);
2122 static int nl80211_get_country(const char *ifname
, char *buf
)
2125 struct nl80211_msg_conveyor
*req
;
2127 req
= nl80211_msg(ifname
, NL80211_CMD_GET_REG
, 0);
2130 nl80211_send(req
, nl80211_get_country_cb
, buf
);
2140 static int nl80211_get_countrylist(const char *ifname
, char *buf
, int *len
)
2143 struct iwinfo_country_entry
*e
= (struct iwinfo_country_entry
*)buf
;
2144 const struct iwinfo_iso3166_label
*l
;
2146 for (l
= IWINFO_ISO3166_NAMES
, count
= 0; l
->iso3166
; l
++, e
++, count
++)
2148 e
->iso3166
= l
->iso3166
;
2149 e
->ccode
[0] = (l
->iso3166
/ 256);
2150 e
->ccode
[1] = (l
->iso3166
% 256);
2153 *len
= (count
* sizeof(struct iwinfo_country_entry
));
2157 static int nl80211_get_hwmodelist_cb(struct nl_msg
*msg
, void *arg
)
2160 int bands_remain
, freqs_remain
;
2162 struct nlattr
**attr
= nl80211_parse(msg
);
2163 struct nlattr
*bands
[NL80211_BAND_ATTR_MAX
+ 1];
2164 struct nlattr
*freqs
[NL80211_FREQUENCY_ATTR_MAX
+ 1];
2165 struct nlattr
*band
, *freq
;
2169 if (attr
[NL80211_ATTR_WIPHY_BANDS
])
2171 nla_for_each_nested(band
, attr
[NL80211_ATTR_WIPHY_BANDS
], bands_remain
)
2173 nla_parse(bands
, NL80211_BAND_ATTR_MAX
,
2174 nla_data(band
), nla_len(band
), NULL
);
2176 if (bands
[NL80211_BAND_ATTR_HT_CAPA
])
2177 caps
= nla_get_u16(bands
[NL80211_BAND_ATTR_HT_CAPA
]);
2179 /* Treat any nonzero capability as 11n */
2181 *modes
|= IWINFO_80211_N
;
2183 nla_for_each_nested(freq
, bands
[NL80211_BAND_ATTR_FREQS
],
2186 nla_parse(freqs
, NL80211_FREQUENCY_ATTR_MAX
,
2187 nla_data(freq
), nla_len(freq
), NULL
);
2189 if (!freqs
[NL80211_FREQUENCY_ATTR_FREQ
])
2192 if (nla_get_u32(freqs
[NL80211_FREQUENCY_ATTR_FREQ
]) < 2485)
2194 *modes
|= IWINFO_80211_B
;
2195 *modes
|= IWINFO_80211_G
;
2199 *modes
|= IWINFO_80211_A
;
2208 static int nl80211_get_hwmodelist(const char *ifname
, int *buf
)
2210 struct nl80211_msg_conveyor
*req
;
2212 req
= nl80211_msg(ifname
, NL80211_CMD_GET_WIPHY
, 0);
2215 nl80211_send(req
, nl80211_get_hwmodelist_cb
, buf
);
2219 return *buf
? 0 : -1;
2222 static int nl80211_get_ifcomb_cb(struct nl_msg
*msg
, void *arg
)
2224 struct nlattr
**attr
= nl80211_parse(msg
);
2225 struct nlattr
*comb
;
2227 int comb_rem
, limit_rem
, mode_rem
;
2230 if (!attr
[NL80211_ATTR_INTERFACE_COMBINATIONS
])
2233 nla_for_each_nested(comb
, attr
[NL80211_ATTR_INTERFACE_COMBINATIONS
], comb_rem
)
2235 static struct nla_policy iface_combination_policy
[NUM_NL80211_IFACE_COMB
] = {
2236 [NL80211_IFACE_COMB_LIMITS
] = { .type
= NLA_NESTED
},
2237 [NL80211_IFACE_COMB_MAXNUM
] = { .type
= NLA_U32
},
2239 struct nlattr
*tb_comb
[NUM_NL80211_IFACE_COMB
];
2240 static struct nla_policy iface_limit_policy
[NUM_NL80211_IFACE_LIMIT
] = {
2241 [NL80211_IFACE_LIMIT_TYPES
] = { .type
= NLA_NESTED
},
2242 [NL80211_IFACE_LIMIT_MAX
] = { .type
= NLA_U32
},
2244 struct nlattr
*tb_limit
[NUM_NL80211_IFACE_LIMIT
];
2245 struct nlattr
*limit
;
2247 nla_parse_nested(tb_comb
, NL80211_BAND_ATTR_MAX
, comb
, iface_combination_policy
);
2249 if (!tb_comb
[NL80211_IFACE_COMB_LIMITS
])
2252 nla_for_each_nested(limit
, tb_comb
[NL80211_IFACE_COMB_LIMITS
], limit_rem
)
2254 struct nlattr
*mode
;
2256 nla_parse_nested(tb_limit
, NUM_NL80211_IFACE_LIMIT
, limit
, iface_limit_policy
);
2258 if (!tb_limit
[NL80211_IFACE_LIMIT_TYPES
] ||
2259 !tb_limit
[NL80211_IFACE_LIMIT_MAX
])
2262 if (nla_get_u32(tb_limit
[NL80211_IFACE_LIMIT_MAX
]) < 2)
2265 nla_for_each_nested(mode
, tb_limit
[NL80211_IFACE_LIMIT_TYPES
], mode_rem
) {
2266 if (nla_type(mode
) == NL80211_IFTYPE_AP
)
2275 static int nl80211_get_mbssid_support(const char *ifname
, int *buf
)
2277 struct nl80211_msg_conveyor
*req
;
2279 req
= nl80211_msg(ifname
, NL80211_CMD_GET_WIPHY
, 0);
2283 nl80211_send(req
, nl80211_get_ifcomb_cb
, buf
);
2288 static int nl80211_get_hardware_id(const char *ifname
, char *buf
)
2293 /* Got a radioX pseudo interface, find some interface on it or create one */
2294 if (!strncmp(ifname
, "radio", 5))
2296 /* Reuse existing interface */
2297 if ((res
= nl80211_phy2ifname(ifname
)) != NULL
)
2299 rv
= wext_ops
.hardware_id(res
, buf
);
2302 /* Need to spawn a temporary iface for finding IDs */
2303 else if ((res
= nl80211_ifadd(ifname
)) != NULL
)
2305 rv
= wext_ops
.hardware_id(res
, buf
);
2311 rv
= wext_ops
.hardware_id(ifname
, buf
);
2314 /* Failed to obtain hardware IDs, search board config */
2317 rv
= iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id
*)buf
);
2323 static const struct iwinfo_hardware_entry
*
2324 nl80211_get_hardware_entry(const char *ifname
)
2326 struct iwinfo_hardware_id id
;
2328 if (nl80211_get_hardware_id(ifname
, (char *)&id
))
2331 return iwinfo_hardware(&id
);
2334 static int nl80211_get_hardware_name(const char *ifname
, char *buf
)
2336 const struct iwinfo_hardware_entry
*hw
;
2338 if (!(hw
= nl80211_get_hardware_entry(ifname
)))
2339 sprintf(buf
, "Generic MAC80211");
2341 sprintf(buf
, "%s %s", hw
->vendor_name
, hw
->device_name
);
2346 static int nl80211_get_txpower_offset(const char *ifname
, int *buf
)
2348 const struct iwinfo_hardware_entry
*hw
;
2350 if (!(hw
= nl80211_get_hardware_entry(ifname
)))
2353 *buf
= hw
->txpower_offset
;
2357 static int nl80211_get_frequency_offset(const char *ifname
, int *buf
)
2359 const struct iwinfo_hardware_entry
*hw
;
2361 if (!(hw
= nl80211_get_hardware_entry(ifname
)))
2364 *buf
= hw
->frequency_offset
;
2368 const struct iwinfo_ops nl80211_ops
= {
2370 .probe
= nl80211_probe
,
2371 .channel
= nl80211_get_channel
,
2372 .frequency
= nl80211_get_frequency
,
2373 .frequency_offset
= nl80211_get_frequency_offset
,
2374 .txpower
= nl80211_get_txpower
,
2375 .txpower_offset
= nl80211_get_txpower_offset
,
2376 .bitrate
= nl80211_get_bitrate
,
2377 .signal
= nl80211_get_signal
,
2378 .noise
= nl80211_get_noise
,
2379 .quality
= nl80211_get_quality
,
2380 .quality_max
= nl80211_get_quality_max
,
2381 .mbssid_support
= nl80211_get_mbssid_support
,
2382 .hwmodelist
= nl80211_get_hwmodelist
,
2383 .mode
= nl80211_get_mode
,
2384 .ssid
= nl80211_get_ssid
,
2385 .bssid
= nl80211_get_bssid
,
2386 .country
= nl80211_get_country
,
2387 .hardware_id
= nl80211_get_hardware_id
,
2388 .hardware_name
= nl80211_get_hardware_name
,
2389 .encryption
= nl80211_get_encryption
,
2390 .phyname
= nl80211_get_phyname
,
2391 .assoclist
= nl80211_get_assoclist
,
2392 .txpwrlist
= nl80211_get_txpwrlist
,
2393 .scanlist
= nl80211_get_scanlist
,
2394 .freqlist
= nl80211_get_freqlist
,
2395 .countrylist
= nl80211_get_countrylist
,
2396 .close
= nl80211_close