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
)-1) <= 0)
548 send(sock
, cmd
, strlen(cmd
), 0);
550 /* we might have to scan up to 72 channels / 256ms per channel */
551 /* this makes up to 18.5s hence 10 tries */
552 while( numtry
++ < 10 )
556 /* make sure there is a terminating nul byte */
557 if (nl80211_wpactl_recv(sock
, buffer
, sizeof(buffer
)-1) <= 0)
565 if ((!event
&& buffer
[0] != '<') || (event
&& strstr(buffer
, event
)))
568 /* there may be more than max(numtry) BSS-ADDED events */
569 /* ignore them similar to wpa_cli */
570 if (buffer
[0] == '<' &&
571 (bracket
=strchr(buffer
,'>')) != NULL
&&
572 strncmp(bracket
+1,"CTRL-EVENT-BSS-ADDED",20) == 0)
581 if (local
.sun_family
)
582 unlink(local
.sun_path
);
587 static inline int nl80211_readint(const char *path
)
593 if ((fd
= open(path
, O_RDONLY
)) > -1)
595 if (read(fd
, buffer
, sizeof(buffer
)) > 0)
604 static char * nl80211_phy2ifname(const char *ifname
)
606 int fd
, ifidx
= -1, cifidx
= -1, phyidx
= -1;
608 static char nif
[IFNAMSIZ
] = { 0 };
615 else if (!strncmp(ifname
, "phy", 3))
616 phyidx
= atoi(&ifname
[3]);
617 else if (!strncmp(ifname
, "radio", 5))
618 phyidx
= atoi(&ifname
[5]);
620 memset(nif
, 0, sizeof(nif
));
624 if ((d
= opendir("/sys/class/net")) != NULL
)
626 while ((e
= readdir(d
)) != NULL
)
628 snprintf(buffer
, sizeof(buffer
),
629 "/sys/class/net/%s/phy80211/index", e
->d_name
);
631 if (nl80211_readint(buffer
) == phyidx
)
633 snprintf(buffer
, sizeof(buffer
),
634 "/sys/class/net/%s/ifindex", e
->d_name
);
636 if ((cifidx
= nl80211_readint(buffer
)) >= 0 &&
637 ((ifidx
< 0) || (cifidx
< ifidx
)))
640 strncpy(nif
, e
->d_name
, sizeof(nif
));
649 return nif
[0] ? nif
: NULL
;
652 static char * nl80211_ifadd(const char *ifname
)
656 static char nif
[IFNAMSIZ
] = { 0 };
657 struct nl80211_msg_conveyor
*req
, *res
;
659 req
= nl80211_msg(ifname
, NL80211_CMD_NEW_INTERFACE
, 0);
662 snprintf(nif
, sizeof(nif
), "tmp.%s", ifname
);
664 NLA_PUT_STRING(req
->msg
, NL80211_ATTR_IFNAME
, nif
);
665 NLA_PUT_U32(req
->msg
, NL80211_ATTR_IFTYPE
, NL80211_IFTYPE_STATION
);
667 nl80211_send(req
, NULL
, NULL
);
678 static void nl80211_ifdel(const char *ifname
)
680 struct nl80211_msg_conveyor
*req
;
682 req
= nl80211_msg(ifname
, NL80211_CMD_DEL_INTERFACE
, 0);
685 NLA_PUT_STRING(req
->msg
, NL80211_ATTR_IFNAME
, ifname
);
687 nl80211_send(req
, NULL
, NULL
);
694 static void nl80211_hostapd_hup(const char *ifname
)
698 char *phy
= nl80211_ifname2phy(ifname
);
702 snprintf(buf
, sizeof(buf
), "/var/run/wifi-%s.pid", phy
);
703 if ((fd
= open(buf
, O_RDONLY
)) > 0)
705 if (read(fd
, buf
, sizeof(buf
)) > 0)
717 int nl80211_probe(const char *ifname
)
719 return !!nl80211_ifname2phy(ifname
);
722 void nl80211_close(void)
727 genl_family_put(nls
->nlctrl
);
730 genl_family_put(nls
->nl80211
);
733 nl_socket_free(nls
->nl_sock
);
736 nl_cache_free(nls
->nl_cache
);
744 static int nl80211_get_mode_cb(struct nl_msg
*msg
, void *arg
)
747 struct nlattr
**tb
= nl80211_parse(msg
);
748 const int ifmodes
[NL80211_IFTYPE_MAX
+ 1] = {
749 IWINFO_OPMODE_UNKNOWN
, /* unspecified */
750 IWINFO_OPMODE_ADHOC
, /* IBSS */
751 IWINFO_OPMODE_CLIENT
, /* managed */
752 IWINFO_OPMODE_MASTER
, /* AP */
753 IWINFO_OPMODE_AP_VLAN
, /* AP/VLAN */
754 IWINFO_OPMODE_WDS
, /* WDS */
755 IWINFO_OPMODE_MONITOR
, /* monitor */
756 IWINFO_OPMODE_MESHPOINT
, /* mesh point */
757 IWINFO_OPMODE_P2P_CLIENT
, /* P2P-client */
758 IWINFO_OPMODE_P2P_GO
, /* P2P-GO */
761 if (tb
[NL80211_ATTR_IFTYPE
])
762 *mode
= ifmodes
[nla_get_u32(tb
[NL80211_ATTR_IFTYPE
])];
767 int nl80211_get_mode(const char *ifname
, int *buf
)
770 struct nl80211_msg_conveyor
*req
;
772 res
= nl80211_phy2ifname(ifname
);
773 req
= nl80211_msg(res
? res
: ifname
, NL80211_CMD_GET_INTERFACE
, 0);
774 *buf
= IWINFO_OPMODE_UNKNOWN
;
778 nl80211_send(req
, nl80211_get_mode_cb
, buf
);
782 return (*buf
== IWINFO_OPMODE_UNKNOWN
) ? -1 : 0;
786 struct nl80211_ssid_bssid
{
788 unsigned char bssid
[7];
791 static int nl80211_get_ssid_bssid_cb(struct nl_msg
*msg
, void *arg
)
795 struct nl80211_ssid_bssid
*sb
= arg
;
796 struct nlattr
**tb
= nl80211_parse(msg
);
797 struct nlattr
*bss
[NL80211_BSS_MAX
+ 1];
799 static struct nla_policy bss_policy
[NL80211_BSS_MAX
+ 1] = {
800 [NL80211_BSS_INFORMATION_ELEMENTS
] = { },
801 [NL80211_BSS_STATUS
] = { .type
= NLA_U32
},
804 if (!tb
[NL80211_ATTR_BSS
] ||
805 nla_parse_nested(bss
, NL80211_BSS_MAX
, tb
[NL80211_ATTR_BSS
],
807 !bss
[NL80211_BSS_BSSID
] ||
808 !bss
[NL80211_BSS_STATUS
] ||
809 !bss
[NL80211_BSS_INFORMATION_ELEMENTS
])
814 switch (nla_get_u32(bss
[NL80211_BSS_STATUS
]))
816 case NL80211_BSS_STATUS_ASSOCIATED
:
817 case NL80211_BSS_STATUS_AUTHENTICATED
:
818 case NL80211_BSS_STATUS_IBSS_JOINED
:
822 ie
= nla_data(bss
[NL80211_BSS_INFORMATION_ELEMENTS
]);
823 ielen
= nla_len(bss
[NL80211_BSS_INFORMATION_ELEMENTS
]);
825 while (ielen
>= 2 && ielen
>= ie
[1])
829 memcpy(sb
->ssid
, ie
+ 2, min(ie
[1], IWINFO_ESSID_MAX_SIZE
));
840 memcpy(sb
->bssid
+ 1, nla_data(bss
[NL80211_BSS_BSSID
]), 6);
849 int nl80211_get_ssid(const char *ifname
, char *buf
)
852 struct nl80211_msg_conveyor
*req
;
853 struct nl80211_ssid_bssid sb
;
855 /* try to find ssid from scan dump results */
856 res
= nl80211_phy2ifname(ifname
);
857 req
= nl80211_msg(res
? res
: ifname
, NL80211_CMD_GET_SCAN
, NLM_F_DUMP
);
864 nl80211_send(req
, nl80211_get_ssid_bssid_cb
, &sb
);
868 /* failed, try to find from hostapd info */
870 (res
= nl80211_hostapd_info(ifname
)) &&
871 (res
= nl80211_getval(ifname
, res
, "ssid")))
873 memcpy(buf
, res
, strlen(res
));
876 return (*buf
== 0) ? -1 : 0;
879 int nl80211_get_bssid(const char *ifname
, char *buf
)
882 struct nl80211_msg_conveyor
*req
;
883 struct nl80211_ssid_bssid sb
;
885 /* try to find bssid from scan dump results */
886 res
= nl80211_phy2ifname(ifname
);
887 req
= nl80211_msg(res
? res
: ifname
, NL80211_CMD_GET_SCAN
, NLM_F_DUMP
);
894 nl80211_send(req
, nl80211_get_ssid_bssid_cb
, &sb
);
898 /* failed, try to find mac from hostapd info */
899 if ((sb
.bssid
[0] == 0) &&
900 (res
= nl80211_hostapd_info(ifname
)) &&
901 (res
= nl80211_getval(ifname
, res
, "bssid")))
904 sb
.bssid
[1] = strtol(&res
[0], NULL
, 16);
905 sb
.bssid
[2] = strtol(&res
[3], NULL
, 16);
906 sb
.bssid
[3] = strtol(&res
[6], NULL
, 16);
907 sb
.bssid
[4] = strtol(&res
[9], NULL
, 16);
908 sb
.bssid
[5] = strtol(&res
[12], NULL
, 16);
909 sb
.bssid
[6] = strtol(&res
[15], NULL
, 16);
914 sprintf(buf
, "%02X:%02X:%02X:%02X:%02X:%02X",
915 sb
.bssid
[1], sb
.bssid
[2], sb
.bssid
[3],
916 sb
.bssid
[4], sb
.bssid
[5], sb
.bssid
[6]);
925 static int nl80211_get_frequency_scan_cb(struct nl_msg
*msg
, void *arg
)
928 struct nlattr
**attr
= nl80211_parse(msg
);
929 struct nlattr
*binfo
[NL80211_BSS_MAX
+ 1];
931 static struct nla_policy bss_policy
[NL80211_BSS_MAX
+ 1] = {
932 [NL80211_BSS_FREQUENCY
] = { .type
= NLA_U32
},
933 [NL80211_BSS_STATUS
] = { .type
= NLA_U32
},
936 if (attr
[NL80211_ATTR_BSS
] &&
937 !nla_parse_nested(binfo
, NL80211_BSS_MAX
,
938 attr
[NL80211_ATTR_BSS
], bss_policy
))
940 if (binfo
[NL80211_BSS_STATUS
] && binfo
[NL80211_BSS_FREQUENCY
])
941 *freq
= nla_get_u32(binfo
[NL80211_BSS_FREQUENCY
]);
947 static int nl80211_get_frequency_info_cb(struct nl_msg
*msg
, void *arg
)
950 struct nlattr
**tb
= nl80211_parse(msg
);
952 if (tb
[NL80211_ATTR_WIPHY_FREQ
])
953 *freq
= nla_get_u32(tb
[NL80211_ATTR_WIPHY_FREQ
]);
958 int nl80211_get_frequency(const char *ifname
, int *buf
)
962 struct nl80211_msg_conveyor
*req
;
964 /* try to find frequency from interface info */
965 res
= nl80211_phy2ifname(ifname
);
966 req
= nl80211_msg(res
? res
: ifname
, NL80211_CMD_GET_INTERFACE
, 0);
971 nl80211_send(req
, nl80211_get_frequency_info_cb
, buf
);
975 /* failed, try to find frequency from hostapd info */
977 (res
= nl80211_hostapd_info(ifname
)) &&
978 (channel
= nl80211_getval(NULL
, res
, "channel")))
981 *buf
= nl80211_channel2freq(chn
, nl80211_getval(NULL
, res
, "hw_mode"));
985 /* failed, try to find frequency from scan results */
988 res
= nl80211_phy2ifname(ifname
);
989 req
= nl80211_msg(res
? res
: ifname
, NL80211_CMD_GET_SCAN
,
994 nl80211_send(req
, nl80211_get_frequency_scan_cb
, buf
);
1000 return (*buf
== 0) ? -1 : 0;
1003 int nl80211_get_channel(const char *ifname
, int *buf
)
1005 if (!nl80211_get_frequency(ifname
, buf
))
1007 *buf
= nl80211_freq2channel(*buf
);
1015 int nl80211_get_txpower(const char *ifname
, int *buf
)
1019 char path
[PATH_MAX
];
1021 res
= nl80211_ifname2phy(ifname
);
1022 snprintf(path
, sizeof(path
), "/sys/kernel/debug/ieee80211/%s/power",
1023 res
? res
: ifname
);
1025 if ((*buf
= nl80211_readint(path
)) > -1)
1029 return wext_get_txpower(ifname
, buf
);
1033 static int nl80211_fill_signal_cb(struct nl_msg
*msg
, void *arg
)
1037 struct nl80211_rssi_rate
*rr
= arg
;
1038 struct nlattr
**attr
= nl80211_parse(msg
);
1039 struct nlattr
*sinfo
[NL80211_STA_INFO_MAX
+ 1];
1040 struct nlattr
*rinfo
[NL80211_RATE_INFO_MAX
+ 1];
1042 static struct nla_policy stats_policy
[NL80211_STA_INFO_MAX
+ 1] = {
1043 [NL80211_STA_INFO_INACTIVE_TIME
] = { .type
= NLA_U32
},
1044 [NL80211_STA_INFO_RX_BYTES
] = { .type
= NLA_U32
},
1045 [NL80211_STA_INFO_TX_BYTES
] = { .type
= NLA_U32
},
1046 [NL80211_STA_INFO_RX_PACKETS
] = { .type
= NLA_U32
},
1047 [NL80211_STA_INFO_TX_PACKETS
] = { .type
= NLA_U32
},
1048 [NL80211_STA_INFO_SIGNAL
] = { .type
= NLA_U8
},
1049 [NL80211_STA_INFO_TX_BITRATE
] = { .type
= NLA_NESTED
},
1050 [NL80211_STA_INFO_LLID
] = { .type
= NLA_U16
},
1051 [NL80211_STA_INFO_PLID
] = { .type
= NLA_U16
},
1052 [NL80211_STA_INFO_PLINK_STATE
] = { .type
= NLA_U8
},
1055 static struct nla_policy rate_policy
[NL80211_RATE_INFO_MAX
+ 1] = {
1056 [NL80211_RATE_INFO_BITRATE
] = { .type
= NLA_U16
},
1057 [NL80211_RATE_INFO_MCS
] = { .type
= NLA_U8
},
1058 [NL80211_RATE_INFO_40_MHZ_WIDTH
] = { .type
= NLA_FLAG
},
1059 [NL80211_RATE_INFO_SHORT_GI
] = { .type
= NLA_FLAG
},
1062 if (attr
[NL80211_ATTR_STA_INFO
])
1064 if (!nla_parse_nested(sinfo
, NL80211_STA_INFO_MAX
,
1065 attr
[NL80211_ATTR_STA_INFO
], stats_policy
))
1067 if (sinfo
[NL80211_STA_INFO_SIGNAL
])
1069 dbm
= nla_get_u8(sinfo
[NL80211_STA_INFO_SIGNAL
]);
1070 rr
->rssi
= rr
->rssi
? (int8_t)((rr
->rssi
+ dbm
) / 2) : dbm
;
1073 if (sinfo
[NL80211_STA_INFO_TX_BITRATE
])
1075 if (!nla_parse_nested(rinfo
, NL80211_RATE_INFO_MAX
,
1076 sinfo
[NL80211_STA_INFO_TX_BITRATE
],
1079 if (rinfo
[NL80211_RATE_INFO_BITRATE
])
1081 mbit
= nla_get_u16(rinfo
[NL80211_RATE_INFO_BITRATE
]);
1083 ? (int16_t)((rr
->rate
+ mbit
) / 2) : mbit
;
1093 static void nl80211_fill_signal(const char *ifname
, struct nl80211_rssi_rate
*r
)
1097 struct nl80211_msg_conveyor
*req
;
1102 if ((d
= opendir("/sys/class/net")) != NULL
)
1104 while ((de
= readdir(d
)) != NULL
)
1106 if (!strncmp(de
->d_name
, ifname
, strlen(ifname
)) &&
1107 (!de
->d_name
[strlen(ifname
)] ||
1108 !strncmp(&de
->d_name
[strlen(ifname
)], ".sta", 4)))
1110 req
= nl80211_msg(de
->d_name
, NL80211_CMD_GET_STATION
,
1115 nl80211_send(req
, nl80211_fill_signal_cb
, r
);
1125 int nl80211_get_bitrate(const char *ifname
, int *buf
)
1127 struct nl80211_rssi_rate rr
;
1129 nl80211_fill_signal(ifname
, &rr
);
1133 *buf
= (rr
.rate
* 100);
1140 int nl80211_get_signal(const char *ifname
, int *buf
)
1142 struct nl80211_rssi_rate rr
;
1144 nl80211_fill_signal(ifname
, &rr
);
1155 static int nl80211_get_noise_cb(struct nl_msg
*msg
, void *arg
)
1157 int8_t *noise
= arg
;
1158 struct nlattr
**tb
= nl80211_parse(msg
);
1159 struct nlattr
*si
[NL80211_SURVEY_INFO_MAX
+ 1];
1161 static struct nla_policy sp
[NL80211_SURVEY_INFO_MAX
+ 1] = {
1162 [NL80211_SURVEY_INFO_FREQUENCY
] = { .type
= NLA_U32
},
1163 [NL80211_SURVEY_INFO_NOISE
] = { .type
= NLA_U8
},
1166 if (!tb
[NL80211_ATTR_SURVEY_INFO
])
1169 if (nla_parse_nested(si
, NL80211_SURVEY_INFO_MAX
,
1170 tb
[NL80211_ATTR_SURVEY_INFO
], sp
))
1173 if (!si
[NL80211_SURVEY_INFO_NOISE
])
1176 if (!*noise
|| si
[NL80211_SURVEY_INFO_IN_USE
])
1177 *noise
= (int8_t)nla_get_u8(si
[NL80211_SURVEY_INFO_NOISE
]);
1183 int nl80211_get_noise(const char *ifname
, int *buf
)
1186 struct nl80211_msg_conveyor
*req
;
1188 req
= nl80211_msg(ifname
, NL80211_CMD_GET_SURVEY
, NLM_F_DUMP
);
1193 nl80211_send(req
, nl80211_get_noise_cb
, &noise
);
1206 int nl80211_get_quality(const char *ifname
, int *buf
)
1210 if (!nl80211_get_signal(ifname
, &signal
))
1212 /* A positive signal level is usually just a quality
1213 * value, pass through as-is */
1219 /* The cfg80211 wext compat layer assumes a signal range
1220 * of -110 dBm to -40 dBm, the quality value is derived
1221 * by adding 110 to the signal level */
1226 else if (signal
> -40)
1229 *buf
= (signal
+ 110);
1238 int nl80211_get_quality_max(const char *ifname
, int *buf
)
1240 /* The cfg80211 wext compat layer assumes a maximum
1247 int nl80211_get_encryption(const char *ifname
, char *buf
)
1252 struct iwinfo_crypto_entry
*c
= (struct iwinfo_crypto_entry
*)buf
;
1254 /* WPA supplicant */
1255 if ((res
= nl80211_wpactl_info(ifname
, "STATUS", NULL
)) &&
1256 (val
= nl80211_getval(NULL
, res
, "pairwise_cipher")))
1259 if (strstr(val
, "WEP"))
1261 if (strstr(val
, "WEP-40"))
1262 c
->pair_ciphers
|= IWINFO_CIPHER_WEP40
;
1264 else if (strstr(val
, "WEP-104"))
1265 c
->pair_ciphers
|= IWINFO_CIPHER_WEP104
;
1268 c
->group_ciphers
= c
->pair_ciphers
;
1270 c
->auth_suites
|= IWINFO_KMGMT_NONE
;
1271 c
->auth_algs
|= IWINFO_AUTH_OPEN
; /* XXX: assumption */
1277 if (strstr(val
, "TKIP"))
1278 c
->pair_ciphers
|= IWINFO_CIPHER_TKIP
;
1280 else if (strstr(val
, "CCMP"))
1281 c
->pair_ciphers
|= IWINFO_CIPHER_CCMP
;
1283 else if (strstr(val
, "NONE"))
1284 c
->pair_ciphers
|= IWINFO_CIPHER_NONE
;
1286 else if (strstr(val
, "WEP-40"))
1287 c
->pair_ciphers
|= IWINFO_CIPHER_WEP40
;
1289 else if (strstr(val
, "WEP-104"))
1290 c
->pair_ciphers
|= IWINFO_CIPHER_WEP104
;
1293 if ((val
= nl80211_getval(NULL
, res
, "group_cipher")))
1295 if (strstr(val
, "TKIP"))
1296 c
->group_ciphers
|= IWINFO_CIPHER_TKIP
;
1298 else if (strstr(val
, "CCMP"))
1299 c
->group_ciphers
|= IWINFO_CIPHER_CCMP
;
1301 else if (strstr(val
, "NONE"))
1302 c
->group_ciphers
|= IWINFO_CIPHER_NONE
;
1304 else if (strstr(val
, "WEP-40"))
1305 c
->group_ciphers
|= IWINFO_CIPHER_WEP40
;
1307 else if (strstr(val
, "WEP-104"))
1308 c
->group_ciphers
|= IWINFO_CIPHER_WEP104
;
1312 if ((val
= nl80211_getval(NULL
, res
, "key_mgmt")))
1314 if (strstr(val
, "WPA2"))
1317 else if (strstr(val
, "WPA"))
1321 if (strstr(val
, "PSK"))
1322 c
->auth_suites
|= IWINFO_KMGMT_PSK
;
1324 else if (strstr(val
, "EAP") || strstr(val
, "802.1X"))
1325 c
->auth_suites
|= IWINFO_KMGMT_8021x
;
1327 else if (strstr(val
, "NONE"))
1328 c
->auth_suites
|= IWINFO_KMGMT_NONE
;
1331 c
->enabled
= (c
->wpa_version
&& c
->auth_suites
) ? 1 : 0;
1338 else if ((res
= nl80211_hostapd_info(ifname
)))
1340 if ((val
= nl80211_getval(ifname
, res
, "wpa")) != NULL
)
1341 c
->wpa_version
= atoi(val
);
1343 val
= nl80211_getval(ifname
, res
, "wpa_key_mgmt");
1345 if (!val
|| strstr(val
, "PSK"))
1346 c
->auth_suites
|= IWINFO_KMGMT_PSK
;
1348 if (val
&& strstr(val
, "EAP"))
1349 c
->auth_suites
|= IWINFO_KMGMT_8021x
;
1351 if (val
&& strstr(val
, "NONE"))
1352 c
->auth_suites
|= IWINFO_KMGMT_NONE
;
1354 if ((val
= nl80211_getval(ifname
, res
, "wpa_pairwise")) != NULL
)
1356 if (strstr(val
, "TKIP"))
1357 c
->pair_ciphers
|= IWINFO_CIPHER_TKIP
;
1359 if (strstr(val
, "CCMP"))
1360 c
->pair_ciphers
|= IWINFO_CIPHER_CCMP
;
1362 if (strstr(val
, "NONE"))
1363 c
->pair_ciphers
|= IWINFO_CIPHER_NONE
;
1366 if ((val
= nl80211_getval(ifname
, res
, "auth_algs")) != NULL
)
1370 c
->auth_algs
|= IWINFO_AUTH_OPEN
;
1374 c
->auth_algs
|= IWINFO_AUTH_SHARED
;
1378 c
->auth_algs
|= IWINFO_AUTH_OPEN
;
1379 c
->auth_algs
|= IWINFO_AUTH_SHARED
;
1386 for (i
= 0; i
< 4; i
++)
1388 snprintf(k
, sizeof(k
), "wep_key%d", i
);
1390 if ((val
= nl80211_getval(ifname
, res
, k
)))
1392 if ((strlen(val
) == 5) || (strlen(val
) == 10))
1393 c
->pair_ciphers
|= IWINFO_CIPHER_WEP40
;
1395 else if ((strlen(val
) == 13) || (strlen(val
) == 26))
1396 c
->pair_ciphers
|= IWINFO_CIPHER_WEP104
;
1401 c
->group_ciphers
= c
->pair_ciphers
;
1402 c
->enabled
= (c
->wpa_version
|| c
->pair_ciphers
) ? 1 : 0;
1410 int nl80211_get_phyname(const char *ifname
, char *buf
)
1414 name
= nl80211_ifname2phy(ifname
);
1421 else if ((name
= nl80211_phy2ifname(ifname
)) != NULL
)
1423 name
= nl80211_ifname2phy(name
);
1427 strcpy(buf
, ifname
);
1436 static int nl80211_get_assoclist_cb(struct nl_msg
*msg
, void *arg
)
1438 struct nl80211_array_buf
*arr
= arg
;
1439 struct iwinfo_assoclist_entry
*e
= arr
->buf
;
1440 struct nlattr
**attr
= nl80211_parse(msg
);
1441 struct nlattr
*sinfo
[NL80211_STA_INFO_MAX
+ 1];
1442 struct nlattr
*rinfo
[NL80211_RATE_INFO_MAX
+ 1];
1444 static struct nla_policy stats_policy
[NL80211_STA_INFO_MAX
+ 1] = {
1445 [NL80211_STA_INFO_INACTIVE_TIME
] = { .type
= NLA_U32
},
1446 [NL80211_STA_INFO_RX_PACKETS
] = { .type
= NLA_U32
},
1447 [NL80211_STA_INFO_TX_PACKETS
] = { .type
= NLA_U32
},
1448 [NL80211_STA_INFO_RX_BITRATE
] = { .type
= NLA_NESTED
},
1449 [NL80211_STA_INFO_TX_BITRATE
] = { .type
= NLA_NESTED
},
1450 [NL80211_STA_INFO_SIGNAL
] = { .type
= NLA_U8
},
1453 static struct nla_policy rate_policy
[NL80211_RATE_INFO_MAX
+ 1] = {
1454 [NL80211_RATE_INFO_BITRATE
] = { .type
= NLA_U16
},
1455 [NL80211_RATE_INFO_MCS
] = { .type
= NLA_U8
},
1456 [NL80211_RATE_INFO_40_MHZ_WIDTH
] = { .type
= NLA_FLAG
},
1457 [NL80211_RATE_INFO_SHORT_GI
] = { .type
= NLA_FLAG
},
1460 /* advance to end of array */
1462 memset(e
, 0, sizeof(*e
));
1464 if (attr
[NL80211_ATTR_MAC
])
1465 memcpy(e
->mac
, nla_data(attr
[NL80211_ATTR_MAC
]), 6);
1467 if (attr
[NL80211_ATTR_STA_INFO
] &&
1468 !nla_parse_nested(sinfo
, NL80211_STA_INFO_MAX
,
1469 attr
[NL80211_ATTR_STA_INFO
], stats_policy
))
1471 if (sinfo
[NL80211_STA_INFO_SIGNAL
])
1472 e
->signal
= nla_get_u8(sinfo
[NL80211_STA_INFO_SIGNAL
]);
1474 if (sinfo
[NL80211_STA_INFO_INACTIVE_TIME
])
1475 e
->inactive
= nla_get_u32(sinfo
[NL80211_STA_INFO_INACTIVE_TIME
]);
1477 if (sinfo
[NL80211_STA_INFO_RX_PACKETS
])
1478 e
->rx_packets
= nla_get_u32(sinfo
[NL80211_STA_INFO_RX_PACKETS
]);
1480 if (sinfo
[NL80211_STA_INFO_TX_PACKETS
])
1481 e
->tx_packets
= nla_get_u32(sinfo
[NL80211_STA_INFO_TX_PACKETS
]);
1483 if (sinfo
[NL80211_STA_INFO_RX_BITRATE
] &&
1484 !nla_parse_nested(rinfo
, NL80211_RATE_INFO_MAX
,
1485 sinfo
[NL80211_STA_INFO_RX_BITRATE
], rate_policy
))
1487 if (rinfo
[NL80211_RATE_INFO_BITRATE
])
1489 nla_get_u16(rinfo
[NL80211_RATE_INFO_BITRATE
]) * 100;
1491 if (rinfo
[NL80211_RATE_INFO_MCS
])
1492 e
->rx_rate
.mcs
= nla_get_u8(rinfo
[NL80211_RATE_INFO_MCS
]);
1494 if (rinfo
[NL80211_RATE_INFO_40_MHZ_WIDTH
])
1495 e
->rx_rate
.is_40mhz
= 1;
1497 if (rinfo
[NL80211_RATE_INFO_SHORT_GI
])
1498 e
->rx_rate
.is_short_gi
= 1;
1501 if (sinfo
[NL80211_STA_INFO_TX_BITRATE
] &&
1502 !nla_parse_nested(rinfo
, NL80211_RATE_INFO_MAX
,
1503 sinfo
[NL80211_STA_INFO_TX_BITRATE
], rate_policy
))
1505 if (rinfo
[NL80211_RATE_INFO_BITRATE
])
1507 nla_get_u16(rinfo
[NL80211_RATE_INFO_BITRATE
]) * 100;
1509 if (rinfo
[NL80211_RATE_INFO_MCS
])
1510 e
->tx_rate
.mcs
= nla_get_u8(rinfo
[NL80211_RATE_INFO_MCS
]);
1512 if (rinfo
[NL80211_RATE_INFO_40_MHZ_WIDTH
])
1513 e
->tx_rate
.is_40mhz
= 1;
1515 if (rinfo
[NL80211_RATE_INFO_SHORT_GI
])
1516 e
->tx_rate
.is_short_gi
= 1;
1520 e
->noise
= 0; /* filled in by caller */
1526 int nl80211_get_assoclist(const char *ifname
, char *buf
, int *len
)
1531 struct nl80211_msg_conveyor
*req
;
1532 struct nl80211_array_buf arr
= { .buf
= buf
, .count
= 0 };
1533 struct iwinfo_assoclist_entry
*e
;
1535 if ((d
= opendir("/sys/class/net")) != NULL
)
1537 while ((de
= readdir(d
)) != NULL
)
1539 if (!strncmp(de
->d_name
, ifname
, strlen(ifname
)) &&
1540 (!de
->d_name
[strlen(ifname
)] ||
1541 !strncmp(&de
->d_name
[strlen(ifname
)], ".sta", 4)))
1543 req
= nl80211_msg(de
->d_name
, NL80211_CMD_GET_STATION
,
1548 nl80211_send(req
, nl80211_get_assoclist_cb
, &arr
);
1556 if (!nl80211_get_noise(ifname
, &noise
))
1557 for (i
= 0, e
= arr
.buf
; i
< arr
.count
; i
++, e
++)
1560 *len
= (arr
.count
* sizeof(struct iwinfo_assoclist_entry
));
1567 static int nl80211_get_txpwrlist_cb(struct nl_msg
*msg
, void *arg
)
1570 int ch_cur
, ch_cmp
, bands_remain
, freqs_remain
;
1572 struct nlattr
**attr
= nl80211_parse(msg
);
1573 struct nlattr
*bands
[NL80211_BAND_ATTR_MAX
+ 1];
1574 struct nlattr
*freqs
[NL80211_FREQUENCY_ATTR_MAX
+ 1];
1575 struct nlattr
*band
, *freq
;
1577 static struct nla_policy freq_policy
[NL80211_FREQUENCY_ATTR_MAX
+ 1] = {
1578 [NL80211_FREQUENCY_ATTR_FREQ
] = { .type
= NLA_U32
},
1579 [NL80211_FREQUENCY_ATTR_DISABLED
] = { .type
= NLA_FLAG
},
1580 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN
] = { .type
= NLA_FLAG
},
1581 [NL80211_FREQUENCY_ATTR_NO_IBSS
] = { .type
= NLA_FLAG
},
1582 [NL80211_FREQUENCY_ATTR_RADAR
] = { .type
= NLA_FLAG
},
1583 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER
] = { .type
= NLA_U32
},
1586 ch_cur
= *dbm_max
; /* value int* is initialized with channel by caller */
1589 nla_for_each_nested(band
, attr
[NL80211_ATTR_WIPHY_BANDS
], bands_remain
)
1591 nla_parse(bands
, NL80211_BAND_ATTR_MAX
, nla_data(band
),
1592 nla_len(band
), NULL
);
1594 nla_for_each_nested(freq
, bands
[NL80211_BAND_ATTR_FREQS
], freqs_remain
)
1596 nla_parse(freqs
, NL80211_FREQUENCY_ATTR_MAX
,
1597 nla_data(freq
), nla_len(freq
), freq_policy
);
1599 ch_cmp
= nl80211_freq2channel(nla_get_u32(
1600 freqs
[NL80211_FREQUENCY_ATTR_FREQ
]));
1602 if ((!ch_cur
|| (ch_cmp
== ch_cur
)) &&
1603 freqs
[NL80211_FREQUENCY_ATTR_MAX_TX_POWER
])
1605 *dbm_max
= (int)(0.01 * nla_get_u32(
1606 freqs
[NL80211_FREQUENCY_ATTR_MAX_TX_POWER
]));
1616 int nl80211_get_txpwrlist(const char *ifname
, char *buf
, int *len
)
1619 int dbm_max
= -1, dbm_cur
, dbm_cnt
;
1620 struct nl80211_msg_conveyor
*req
;
1621 struct iwinfo_txpwrlist_entry entry
;
1623 if (nl80211_get_channel(ifname
, &ch_cur
))
1626 req
= nl80211_msg(ifname
, NL80211_CMD_GET_WIPHY
, 0);
1629 /* initialize the value pointer with channel for callback */
1632 nl80211_send(req
, nl80211_get_txpwrlist_cb
, &dbm_max
);
1638 for (dbm_cur
= 0, dbm_cnt
= 0;
1640 dbm_cur
++, dbm_cnt
++)
1642 entry
.dbm
= dbm_cur
;
1643 entry
.mw
= iwinfo_dbm2mw(dbm_cur
);
1645 memcpy(&buf
[dbm_cnt
* sizeof(entry
)], &entry
, sizeof(entry
));
1648 entry
.dbm
= dbm_max
;
1649 entry
.mw
= iwinfo_dbm2mw(dbm_max
);
1651 memcpy(&buf
[dbm_cnt
* sizeof(entry
)], &entry
, sizeof(entry
));
1654 *len
= dbm_cnt
* sizeof(entry
);
1661 static void nl80211_get_scancrypto(const char *spec
,
1662 struct iwinfo_crypto_entry
*c
)
1664 if (strstr(spec
, "WPA") || strstr(spec
, "WEP"))
1668 if (strstr(spec
, "WPA2-") && strstr(spec
, "WPA-"))
1671 else if (strstr(spec
, "WPA2"))
1674 else if (strstr(spec
, "WPA"))
1677 else if (strstr(spec
, "WEP"))
1678 c
->auth_algs
= IWINFO_AUTH_OPEN
| IWINFO_AUTH_SHARED
;
1681 if (strstr(spec
, "PSK"))
1682 c
->auth_suites
|= IWINFO_KMGMT_PSK
;
1684 if (strstr(spec
, "802.1X") || strstr(spec
, "EAP"))
1685 c
->auth_suites
|= IWINFO_KMGMT_8021x
;
1687 if (strstr(spec
, "WPA-NONE"))
1688 c
->auth_suites
|= IWINFO_KMGMT_NONE
;
1691 if (strstr(spec
, "TKIP"))
1692 c
->pair_ciphers
|= IWINFO_CIPHER_TKIP
;
1694 if (strstr(spec
, "CCMP"))
1695 c
->pair_ciphers
|= IWINFO_CIPHER_CCMP
;
1697 if (strstr(spec
, "WEP-40"))
1698 c
->pair_ciphers
|= IWINFO_CIPHER_WEP40
;
1700 if (strstr(spec
, "WEP-104"))
1701 c
->pair_ciphers
|= IWINFO_CIPHER_WEP104
;
1703 c
->group_ciphers
= c
->pair_ciphers
;
1712 struct nl80211_scanlist
{
1713 struct iwinfo_scanlist_entry
*e
;
1718 static void nl80211_get_scanlist_ie(struct nlattr
**bss
,
1719 struct iwinfo_scanlist_entry
*e
)
1721 int ielen
= nla_len(bss
[NL80211_BSS_INFORMATION_ELEMENTS
]);
1722 unsigned char *ie
= nla_data(bss
[NL80211_BSS_INFORMATION_ELEMENTS
]);
1723 static unsigned char ms_oui
[3] = { 0x00, 0x50, 0xf2 };
1725 while (ielen
>= 2 && ielen
>= ie
[1])
1730 memcpy(e
->ssid
, ie
+ 2, min(ie
[1], IWINFO_ESSID_MAX_SIZE
));
1734 iwinfo_parse_rsn(&e
->crypto
, ie
+ 2, ie
[1],
1735 IWINFO_CIPHER_CCMP
, IWINFO_KMGMT_8021x
);
1738 case 221: /* Vendor */
1739 if (ie
[1] >= 4 && !memcmp(ie
+ 2, ms_oui
, 3) && ie
[5] == 1)
1740 iwinfo_parse_rsn(&e
->crypto
, ie
+ 6, ie
[1] - 4,
1741 IWINFO_CIPHER_TKIP
, IWINFO_KMGMT_PSK
);
1750 static int nl80211_get_scanlist_cb(struct nl_msg
*msg
, void *arg
)
1755 struct nl80211_scanlist
*sl
= arg
;
1756 struct nlattr
**tb
= nl80211_parse(msg
);
1757 struct nlattr
*bss
[NL80211_BSS_MAX
+ 1];
1759 static struct nla_policy bss_policy
[NL80211_BSS_MAX
+ 1] = {
1760 [NL80211_BSS_TSF
] = { .type
= NLA_U64
},
1761 [NL80211_BSS_FREQUENCY
] = { .type
= NLA_U32
},
1762 [NL80211_BSS_BSSID
] = { },
1763 [NL80211_BSS_BEACON_INTERVAL
] = { .type
= NLA_U16
},
1764 [NL80211_BSS_CAPABILITY
] = { .type
= NLA_U16
},
1765 [NL80211_BSS_INFORMATION_ELEMENTS
] = { },
1766 [NL80211_BSS_SIGNAL_MBM
] = { .type
= NLA_U32
},
1767 [NL80211_BSS_SIGNAL_UNSPEC
] = { .type
= NLA_U8
},
1768 [NL80211_BSS_STATUS
] = { .type
= NLA_U32
},
1769 [NL80211_BSS_SEEN_MS_AGO
] = { .type
= NLA_U32
},
1770 [NL80211_BSS_BEACON_IES
] = { },
1773 if (!tb
[NL80211_ATTR_BSS
] ||
1774 nla_parse_nested(bss
, NL80211_BSS_MAX
, tb
[NL80211_ATTR_BSS
],
1776 !bss
[NL80211_BSS_BSSID
])
1781 if (bss
[NL80211_BSS_CAPABILITY
])
1782 caps
= nla_get_u16(bss
[NL80211_BSS_CAPABILITY
]);
1786 memset(sl
->e
, 0, sizeof(*sl
->e
));
1787 memcpy(sl
->e
->mac
, nla_data(bss
[NL80211_BSS_BSSID
]), 6);
1790 sl
->e
->mode
= IWINFO_OPMODE_ADHOC
;
1791 else if (caps
& (1<<0))
1792 sl
->e
->mode
= IWINFO_OPMODE_MASTER
;
1794 sl
->e
->mode
= IWINFO_OPMODE_MESHPOINT
;
1797 sl
->e
->crypto
.enabled
= 1;
1799 if (bss
[NL80211_BSS_FREQUENCY
])
1800 sl
->e
->channel
= nl80211_freq2channel(nla_get_u32(
1801 bss
[NL80211_BSS_FREQUENCY
]));
1803 if (bss
[NL80211_BSS_INFORMATION_ELEMENTS
])
1804 nl80211_get_scanlist_ie(bss
, sl
->e
);
1806 if (bss
[NL80211_BSS_SIGNAL_MBM
])
1809 (uint8_t)((int32_t)nla_get_u32(bss
[NL80211_BSS_SIGNAL_MBM
]) / 100);
1811 rssi
= sl
->e
->signal
- 0x100;
1815 else if (rssi
> -40)
1818 sl
->e
->quality
= (rssi
+ 110);
1819 sl
->e
->quality_max
= 70;
1822 if (sl
->e
->crypto
.enabled
&& !sl
->e
->crypto
.wpa_version
)
1824 sl
->e
->crypto
.auth_algs
= IWINFO_AUTH_OPEN
| IWINFO_AUTH_SHARED
;
1825 sl
->e
->crypto
.pair_ciphers
= IWINFO_CIPHER_WEP40
| IWINFO_CIPHER_WEP104
;
1834 static int nl80211_get_scanlist_nl(const char *ifname
, char *buf
, int *len
)
1836 struct nl80211_msg_conveyor
*req
;
1837 struct nl80211_scanlist sl
= { .e
= (struct iwinfo_scanlist_entry
*)buf
};
1839 req
= nl80211_msg(ifname
, NL80211_CMD_TRIGGER_SCAN
, 0);
1842 nl80211_send(req
, NULL
, NULL
);
1846 nl80211_wait("nl80211", "scan", NL80211_CMD_NEW_SCAN_RESULTS
);
1848 req
= nl80211_msg(ifname
, NL80211_CMD_GET_SCAN
, NLM_F_DUMP
);
1851 nl80211_send(req
, nl80211_get_scanlist_cb
, &sl
);
1855 *len
= sl
.len
* sizeof(struct iwinfo_scanlist_entry
);
1856 return *len
? 0 : -1;
1859 int nl80211_get_scanlist(const char *ifname
, char *buf
, int *len
)
1861 int freq
, rssi
, qmax
, count
;
1863 char ssid
[128] = { 0 };
1864 char bssid
[18] = { 0 };
1865 char cipher
[256] = { 0 };
1867 /* Got a radioX pseudo interface, find some interface on it or create one */
1868 if (!strncmp(ifname
, "radio", 5))
1870 /* Reuse existing interface */
1871 if ((res
= nl80211_phy2ifname(ifname
)) != NULL
)
1873 return nl80211_get_scanlist(res
, buf
, len
);
1876 /* Need to spawn a temporary iface for scanning */
1877 else if ((res
= nl80211_ifadd(ifname
)) != NULL
)
1879 count
= nl80211_get_scanlist(res
, buf
, len
);
1885 struct iwinfo_scanlist_entry
*e
= (struct iwinfo_scanlist_entry
*)buf
;
1887 /* WPA supplicant */
1888 if ((res
= nl80211_wpactl_info(ifname
, "SCAN", "CTRL-EVENT-SCAN-RESULTS")))
1890 if ((res
= nl80211_wpactl_info(ifname
, "SCAN_RESULTS", NULL
)))
1892 nl80211_get_quality_max(ifname
, &qmax
);
1899 /* skip log lines */
1904 /* skip header line */
1908 if (sscanf(res
, "%17s %d %d %255s%*[ \t]%127[^\n]\n",
1909 bssid
, &freq
, &rssi
, cipher
, ssid
) < 5)
1911 /* skip malformed lines */
1915 e
->mac
[0] = strtol(&bssid
[0], NULL
, 16);
1916 e
->mac
[1] = strtol(&bssid
[3], NULL
, 16);
1917 e
->mac
[2] = strtol(&bssid
[6], NULL
, 16);
1918 e
->mac
[3] = strtol(&bssid
[9], NULL
, 16);
1919 e
->mac
[4] = strtol(&bssid
[12], NULL
, 16);
1920 e
->mac
[5] = strtol(&bssid
[15], NULL
, 16);
1923 memcpy(e
->ssid
, ssid
, min(strlen(ssid
), sizeof(e
->ssid
) - 1));
1925 /* Mode (assume master) */
1926 if (strstr(cipher
,"[MESH]"))
1927 e
->mode
= IWINFO_OPMODE_MESHPOINT
;
1929 e
->mode
= IWINFO_OPMODE_MASTER
;
1932 e
->channel
= nl80211_freq2channel(freq
);
1940 /* The cfg80211 wext compat layer assumes a signal range
1941 * of -110 dBm to -40 dBm, the quality value is derived
1942 * by adding 110 to the signal level */
1945 else if (rssi
> -40)
1948 e
->quality
= (rssi
+ 110);
1956 e
->quality_max
= qmax
;
1959 nl80211_get_scancrypto(cipher
, &e
->crypto
);
1964 memset(ssid
, 0, sizeof(ssid
));
1965 memset(bssid
, 0, sizeof(bssid
));
1966 memset(cipher
, 0, sizeof(cipher
));
1969 /* advance to next line */
1970 while( *res
&& *res
++ != '\n' );
1974 *len
= count
* sizeof(struct iwinfo_scanlist_entry
);
1982 /* Got a temp interface, don't create yet another one */
1983 if (!strncmp(ifname
, "tmp.", 4))
1985 if (!iwinfo_ifup(ifname
))
1988 nl80211_get_scanlist_nl(ifname
, buf
, len
);
1989 iwinfo_ifdown(ifname
);
1993 /* Spawn a new scan interface */
1996 if (!(res
= nl80211_ifadd(ifname
)))
1999 if (!iwinfo_ifmac(res
))
2002 /* if we can take the new interface up, the driver supports an
2003 * additional interface and there's no need to tear down the ap */
2004 if (iwinfo_ifup(res
))
2006 nl80211_get_scanlist_nl(res
, buf
, len
);
2010 /* driver cannot create secondary interface, take down ap
2012 else if (iwinfo_ifdown(ifname
) && iwinfo_ifup(res
))
2014 nl80211_get_scanlist_nl(res
, buf
, len
);
2016 iwinfo_ifup(ifname
);
2017 nl80211_hostapd_hup(ifname
);
2029 static int nl80211_get_freqlist_cb(struct nl_msg
*msg
, void *arg
)
2031 int bands_remain
, freqs_remain
;
2033 struct nl80211_array_buf
*arr
= arg
;
2034 struct iwinfo_freqlist_entry
*e
= arr
->buf
;
2036 struct nlattr
**attr
= nl80211_parse(msg
);
2037 struct nlattr
*bands
[NL80211_BAND_ATTR_MAX
+ 1];
2038 struct nlattr
*freqs
[NL80211_FREQUENCY_ATTR_MAX
+ 1];
2039 struct nlattr
*band
, *freq
;
2041 static struct nla_policy freq_policy
[NL80211_FREQUENCY_ATTR_MAX
+ 1] = {
2042 [NL80211_FREQUENCY_ATTR_FREQ
] = { .type
= NLA_U32
},
2043 [NL80211_FREQUENCY_ATTR_DISABLED
] = { .type
= NLA_FLAG
},
2044 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN
] = { .type
= NLA_FLAG
},
2045 [NL80211_FREQUENCY_ATTR_NO_IBSS
] = { .type
= NLA_FLAG
},
2046 [NL80211_FREQUENCY_ATTR_RADAR
] = { .type
= NLA_FLAG
},
2047 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER
] = { .type
= NLA_U32
},
2050 nla_for_each_nested(band
, attr
[NL80211_ATTR_WIPHY_BANDS
], bands_remain
)
2052 nla_parse(bands
, NL80211_BAND_ATTR_MAX
,
2053 nla_data(band
), nla_len(band
), NULL
);
2055 nla_for_each_nested(freq
, bands
[NL80211_BAND_ATTR_FREQS
], freqs_remain
)
2057 nla_parse(freqs
, NL80211_FREQUENCY_ATTR_MAX
,
2058 nla_data(freq
), nla_len(freq
), NULL
);
2060 if (!freqs
[NL80211_FREQUENCY_ATTR_FREQ
] ||
2061 freqs
[NL80211_FREQUENCY_ATTR_DISABLED
])
2064 e
->mhz
= nla_get_u32(freqs
[NL80211_FREQUENCY_ATTR_FREQ
]);
2065 e
->channel
= nl80211_freq2channel(e
->mhz
);
2068 freqs
[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN
] ||
2069 freqs
[NL80211_FREQUENCY_ATTR_NO_IBSS
] ||
2070 freqs
[NL80211_FREQUENCY_ATTR_RADAR
]
2081 int nl80211_get_freqlist(const char *ifname
, char *buf
, int *len
)
2083 struct nl80211_msg_conveyor
*req
;
2084 struct nl80211_array_buf arr
= { .buf
= buf
, .count
= 0 };
2086 req
= nl80211_msg(ifname
, NL80211_CMD_GET_WIPHY
, 0);
2089 nl80211_send(req
, nl80211_get_freqlist_cb
, &arr
);
2095 *len
= arr
.count
* sizeof(struct iwinfo_freqlist_entry
);
2102 static int nl80211_get_country_cb(struct nl_msg
*msg
, void *arg
)
2105 struct nlattr
**attr
= nl80211_parse(msg
);
2107 if (attr
[NL80211_ATTR_REG_ALPHA2
])
2108 memcpy(buf
, nla_data(attr
[NL80211_ATTR_REG_ALPHA2
]), 2);
2115 int nl80211_get_country(const char *ifname
, char *buf
)
2118 struct nl80211_msg_conveyor
*req
;
2120 req
= nl80211_msg(ifname
, NL80211_CMD_GET_REG
, 0);
2123 nl80211_send(req
, nl80211_get_country_cb
, buf
);
2133 int nl80211_get_countrylist(const char *ifname
, char *buf
, int *len
)
2136 struct iwinfo_country_entry
*e
= (struct iwinfo_country_entry
*)buf
;
2137 const struct iwinfo_iso3166_label
*l
;
2139 for (l
= IWINFO_ISO3166_NAMES
, count
= 0; l
->iso3166
; l
++, e
++, count
++)
2141 e
->iso3166
= l
->iso3166
;
2142 e
->ccode
[0] = (l
->iso3166
/ 256);
2143 e
->ccode
[1] = (l
->iso3166
% 256);
2146 *len
= (count
* sizeof(struct iwinfo_country_entry
));
2150 static int nl80211_get_hwmodelist_cb(struct nl_msg
*msg
, void *arg
)
2153 int bands_remain
, freqs_remain
;
2155 struct nlattr
**attr
= nl80211_parse(msg
);
2156 struct nlattr
*bands
[NL80211_BAND_ATTR_MAX
+ 1];
2157 struct nlattr
*freqs
[NL80211_FREQUENCY_ATTR_MAX
+ 1];
2158 struct nlattr
*band
, *freq
;
2162 if (attr
[NL80211_ATTR_WIPHY_BANDS
])
2164 nla_for_each_nested(band
, attr
[NL80211_ATTR_WIPHY_BANDS
], bands_remain
)
2166 nla_parse(bands
, NL80211_BAND_ATTR_MAX
,
2167 nla_data(band
), nla_len(band
), NULL
);
2169 if (bands
[NL80211_BAND_ATTR_HT_CAPA
])
2170 caps
= nla_get_u16(bands
[NL80211_BAND_ATTR_HT_CAPA
]);
2172 /* Treat any nonzero capability as 11n */
2174 *modes
|= IWINFO_80211_N
;
2176 nla_for_each_nested(freq
, bands
[NL80211_BAND_ATTR_FREQS
],
2179 nla_parse(freqs
, NL80211_FREQUENCY_ATTR_MAX
,
2180 nla_data(freq
), nla_len(freq
), NULL
);
2182 if (!freqs
[NL80211_FREQUENCY_ATTR_FREQ
])
2185 if (nla_get_u32(freqs
[NL80211_FREQUENCY_ATTR_FREQ
]) < 2485)
2187 *modes
|= IWINFO_80211_B
;
2188 *modes
|= IWINFO_80211_G
;
2192 *modes
|= IWINFO_80211_A
;
2201 int nl80211_get_hwmodelist(const char *ifname
, int *buf
)
2203 struct nl80211_msg_conveyor
*req
;
2205 req
= nl80211_msg(ifname
, NL80211_CMD_GET_WIPHY
, 0);
2208 nl80211_send(req
, nl80211_get_hwmodelist_cb
, buf
);
2212 return *buf
? 0 : -1;
2215 int nl80211_get_mbssid_support(const char *ifname
, int *buf
)
2217 /* Test whether we can create another interface */
2218 char *nif
= nl80211_ifadd(ifname
);
2222 *buf
= (iwinfo_ifmac(nif
) && iwinfo_ifup(nif
));
2233 int nl80211_get_hardware_id(const char *ifname
, char *buf
)
2238 /* Got a radioX pseudo interface, find some interface on it or create one */
2239 if (!strncmp(ifname
, "radio", 5))
2241 /* Reuse existing interface */
2242 if ((res
= nl80211_phy2ifname(ifname
)) != NULL
)
2244 rv
= wext_get_hardware_id(res
, buf
);
2247 /* Need to spawn a temporary iface for finding IDs */
2248 else if ((res
= nl80211_ifadd(ifname
)) != NULL
)
2250 rv
= wext_get_hardware_id(res
, buf
);
2256 rv
= wext_get_hardware_id(ifname
, buf
);
2259 /* Failed to obtain hardware IDs, search board config */
2262 rv
= iwinfo_hardware_id_from_mtd((struct iwinfo_hardware_id
*)buf
);
2268 static const struct iwinfo_hardware_entry
*
2269 nl80211_get_hardware_entry(const char *ifname
)
2271 struct iwinfo_hardware_id id
;
2273 if (nl80211_get_hardware_id(ifname
, (char *)&id
))
2276 return iwinfo_hardware(&id
);
2279 int nl80211_get_hardware_name(const char *ifname
, char *buf
)
2281 const struct iwinfo_hardware_entry
*hw
;
2283 if (!(hw
= nl80211_get_hardware_entry(ifname
)))
2284 sprintf(buf
, "Generic MAC80211");
2286 sprintf(buf
, "%s %s", hw
->vendor_name
, hw
->device_name
);
2291 int nl80211_get_txpower_offset(const char *ifname
, int *buf
)
2293 const struct iwinfo_hardware_entry
*hw
;
2295 if (!(hw
= nl80211_get_hardware_entry(ifname
)))
2298 *buf
= hw
->txpower_offset
;
2302 int nl80211_get_frequency_offset(const char *ifname
, int *buf
)
2304 const struct iwinfo_hardware_entry
*hw
;
2306 if (!(hw
= nl80211_get_hardware_entry(ifname
)))
2309 *buf
= hw
->frequency_offset
;