1 // vim:ts=4:sw=4:expandtab
4 #include <yajl/yajl_gen.h>
5 #include <yajl/yajl_version.h>
10 #include <netlink/netlink.h>
11 #include <netlink/genl/genl.h>
12 #include <netlink/genl/ctrl.h>
13 #include <linux/nl80211.h>
14 #include <linux/if_ether.h>
15 #define IW_ESSID_MAX_SIZE 32
19 #define IW_ESSID_MAX_SIZE 32
23 #include <sys/param.h>
24 #include <sys/ioctl.h>
25 #include <sys/socket.h>
28 #include <net/if_media.h>
29 #include <net80211/ieee80211.h>
30 #include <net80211/ieee80211_ioctl.h>
32 #define IW_ESSID_MAX_SIZE IEEE80211_NWID_LEN
36 #include <sys/param.h>
37 #include <sys/ioctl.h>
38 #include <sys/socket.h>
41 #include <net/if_media.h>
42 #include <netproto/802_11/ieee80211.h>
43 #include <netproto/802_11/ieee80211_ioctl.h>
45 #define IW_ESSID_MAX_SIZE IEEE80211_NWID_LEN
49 #include <sys/ioctl.h>
50 #include <sys/socket.h>
52 #include <sys/types.h>
53 #include <netinet/in.h>
54 #include <netinet/if_ether.h>
55 #include <net80211/ieee80211.h>
56 #include <net80211/ieee80211_ioctl.h>
57 #define IW_ESSID_MAX_SIZE IEEE80211_NWID_LEN
61 #include <sys/types.h>
62 #include <net80211/ieee80211.h>
63 #define IW_ESSID_MAX_SIZE IEEE80211_NWID_LEN
68 #define WIRELESS_INFO_FLAG_HAS_ESSID (1 << 0)
69 #define WIRELESS_INFO_FLAG_HAS_QUALITY (1 << 1)
70 #define WIRELESS_INFO_FLAG_HAS_SIGNAL (1 << 2)
71 #define WIRELESS_INFO_FLAG_HAS_NOISE (1 << 3)
72 #define WIRELESS_INFO_FLAG_HAS_FREQUENCY (1 << 4)
74 #define PERCENT_VALUE(value, total) ((int)(value * 100 / (float)total + 0.5f))
78 #ifdef IW_ESSID_MAX_SIZE
79 char essid[IW_ESSID_MAX_SIZE + 1];
82 uint8_t bssid[ETH_ALEN];
96 // Like iw_print_bitrate, but without the dependency on libiw.
97 static void print_bitrate(char *buffer, int buflen, int bitrate) {
100 const int giga = 1e9;
102 const double rate = bitrate;
109 } else if (rate >= mega) {
116 snprintf(buffer, buflen, "%g %cb/s", rate / divisor, scale);
119 // Based on NetworkManager/src/platform/wifi/wifi-utils-nl80211.c
120 static uint32_t nl80211_xbm_to_percent(int32_t xbm, int32_t divisor) {
121 #define NOISE_FLOOR_DBM -90
122 #define SIGNAL_MAX_DBM -20
125 if (xbm < NOISE_FLOOR_DBM)
126 xbm = NOISE_FLOOR_DBM;
127 if (xbm > SIGNAL_MAX_DBM)
128 xbm = SIGNAL_MAX_DBM;
130 return 100 - 70 * (((float)SIGNAL_MAX_DBM - (float)xbm) / ((float)SIGNAL_MAX_DBM - (float)NOISE_FLOOR_DBM));
133 // Based on NetworkManager/src/platform/wifi/wifi-utils-nl80211.c
134 static void find_ssid(uint8_t *ies, uint32_t ies_len, uint8_t **ssid, uint32_t *ssid_len) {
135 #define WLAN_EID_SSID 0
139 while (ies_len > 2 && ies[0] != WLAN_EID_SSID) {
140 ies_len -= ies[1] + 2;
145 if (ies_len < (uint32_t)(2 + ies[1]))
152 static int gwi_sta_cb(struct nl_msg *msg, void *data) {
153 wireless_info_t *info = data;
155 struct nlattr *tb[NL80211_ATTR_MAX + 1];
156 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
157 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
158 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
159 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
160 [NL80211_STA_INFO_RX_BITRATE] = {.type = NLA_NESTED},
163 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
164 [NL80211_RATE_INFO_BITRATE] = {.type = NLA_U16},
167 if (nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL) < 0)
170 if (tb[NL80211_ATTR_STA_INFO] == NULL)
173 if (nla_parse_nested(sinfo, NL80211_STA_INFO_MAX, tb[NL80211_ATTR_STA_INFO], stats_policy))
176 if (sinfo[NL80211_STA_INFO_RX_BITRATE] == NULL)
179 if (nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
182 if (rinfo[NL80211_RATE_INFO_BITRATE] == NULL)
185 // NL80211_RATE_INFO_BITRATE is specified in units of 100 kbit/s, but iw
186 // used to specify bit/s, so we convert to use the same code path.
187 info->bitrate = (int)nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100 * 1000;
192 static int gwi_scan_cb(struct nl_msg *msg, void *data) {
193 wireless_info_t *info = data;
194 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
195 struct nlattr *tb[NL80211_ATTR_MAX + 1];
196 struct nlattr *bss[NL80211_BSS_MAX + 1];
197 struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
198 [NL80211_BSS_FREQUENCY] = {.type = NLA_U32},
199 [NL80211_BSS_BSSID] = {.type = NLA_UNSPEC},
200 [NL80211_BSS_INFORMATION_ELEMENTS] = {.type = NLA_UNSPEC},
201 [NL80211_BSS_SIGNAL_MBM] = {.type = NLA_U32},
202 [NL80211_BSS_SIGNAL_UNSPEC] = {.type = NLA_U8},
203 [NL80211_BSS_STATUS] = {.type = NLA_U32},
206 if (nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL) < 0)
209 if (tb[NL80211_ATTR_BSS] == NULL)
212 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], bss_policy))
215 if (bss[NL80211_BSS_STATUS] == NULL)
218 const uint32_t status = nla_get_u32(bss[NL80211_BSS_STATUS]);
220 if (status != NL80211_BSS_STATUS_ASSOCIATED &&
221 status != NL80211_BSS_STATUS_IBSS_JOINED)
224 if (bss[NL80211_BSS_BSSID] == NULL)
227 memcpy(info->bssid, nla_data(bss[NL80211_BSS_BSSID]), ETH_ALEN);
229 if (bss[NL80211_BSS_FREQUENCY]) {
230 info->flags |= WIRELESS_INFO_FLAG_HAS_FREQUENCY;
231 info->frequency = (double)nla_get_u32(bss[NL80211_BSS_FREQUENCY]) * 1e6;
234 if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
235 info->flags |= WIRELESS_INFO_FLAG_HAS_SIGNAL;
236 info->signal_level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
237 info->signal_level_max = 100;
239 info->flags |= WIRELESS_INFO_FLAG_HAS_QUALITY;
240 info->quality = info->signal_level;
241 info->quality_max = 100;
242 info->quality_average = 50;
245 if (bss[NL80211_BSS_SIGNAL_MBM]) {
246 info->flags |= WIRELESS_INFO_FLAG_HAS_SIGNAL;
247 info->signal_level = (int)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100;
249 info->flags |= WIRELESS_INFO_FLAG_HAS_QUALITY;
250 info->quality = nl80211_xbm_to_percent(nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]), 100);
251 info->quality_max = 100;
252 info->quality_average = 50;
255 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
259 find_ssid(nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]),
260 nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]),
262 if (ssid && ssid_len) {
263 info->flags |= WIRELESS_INFO_FLAG_HAS_ESSID;
264 snprintf(info->essid, sizeof(info->essid), "%.*s", ssid_len, ssid);
272 static int get_wireless_info(const char *interface, wireless_info_t *info) {
273 memset(info, 0, sizeof(wireless_info_t));
276 struct nl_sock *sk = nl_socket_alloc();
277 if (genl_connect(sk) != 0)
280 if (nl_socket_modify_cb(sk, NL_CB_VALID, NL_CB_CUSTOM, gwi_scan_cb, info) < 0)
283 const int nl80211_id = genl_ctrl_resolve(sk, "nl80211");
287 const unsigned int ifidx = if_nametoindex(interface);
291 struct nl_msg *msg = NULL;
292 if ((msg = nlmsg_alloc()) == NULL)
295 if (!genlmsg_put(msg, NL_AUTO_PORT, NL_AUTO_SEQ, nl80211_id, 0, NLM_F_DUMP, NL80211_CMD_GET_SCAN, 0) ||
296 nla_put_u32(msg, NL80211_ATTR_IFINDEX, ifidx) < 0)
299 if (nl_send_sync(sk, msg) < 0)
300 // nl_send_sync calls nlmsg_free()
304 if (nl_socket_modify_cb(sk, NL_CB_VALID, NL_CB_CUSTOM, gwi_sta_cb, info) < 0)
307 if ((msg = nlmsg_alloc()) == NULL)
310 if (!genlmsg_put(msg, NL_AUTO_PORT, NL_AUTO_SEQ, nl80211_id, 0, NLM_F_DUMP, NL80211_CMD_GET_STATION, 0) || nla_put_u32(msg, NL80211_ATTR_IFINDEX, ifidx) < 0 || nla_put(msg, NL80211_ATTR_MAC, 6, info->bssid) < 0)
313 if (nl_send_sync(sk, msg) < 0)
314 // nl_send_sync calls nlmsg_free()
328 #if defined(__FreeBSD__) || defined(__DragonFly__)
331 struct ieee80211req_sta_req req;
332 uint8_t buf[24 * 1024];
334 struct ieee80211req na;
335 char bssid[IEEE80211_ADDR_LEN];
338 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
341 memset(&na, 0, sizeof(na));
342 strlcpy(na.i_name, interface, sizeof(na.i_name));
343 na.i_type = IEEE80211_IOC_SSID;
344 na.i_data = &info->essid[0];
345 na.i_len = IEEE80211_NWID_LEN + 1;
346 if ((inwid = ioctl(s, SIOCG80211, (caddr_t)&na)) == -1) {
351 if (na.i_len <= IEEE80211_NWID_LEN)
354 len = IEEE80211_NWID_LEN + 1;
355 info->essid[len - 1] = '\0';
360 info->flags |= WIRELESS_INFO_FLAG_HAS_ESSID;
362 memset(&na, 0, sizeof(na));
363 strlcpy(na.i_name, interface, sizeof(na.i_name));
364 na.i_type = IEEE80211_IOC_BSSID;
366 na.i_len = sizeof(bssid);
368 if (ioctl(s, SIOCG80211, (caddr_t)&na) == -1) {
373 memcpy(u.req.is_u.macaddr, bssid, sizeof(bssid));
374 memset(&na, 0, sizeof(na));
375 strlcpy(na.i_name, interface, sizeof(na.i_name));
376 na.i_type = IEEE80211_IOC_STA_INFO;
378 na.i_len = sizeof(u);
380 if (ioctl(s, SIOCG80211, (caddr_t)&na) == -1) {
386 if (na.i_len >= sizeof(u.req)) {
388 * Just use the first BSSID returned even if there are
389 * multiple APs sharing the same BSSID.
391 info->signal_level = u.req.info[0].isi_rssi / 2 +
392 u.req.info[0].isi_noise;
393 info->flags |= WIRELESS_INFO_FLAG_HAS_SIGNAL;
394 info->noise_level = u.req.info[0].isi_noise;
395 info->flags |= WIRELESS_INFO_FLAG_HAS_NOISE;
402 struct ieee80211_bssid bssid;
403 struct ieee80211_nwid nwid;
404 struct ieee80211_nodereq nr;
406 struct ether_addr ea;
408 int s, len, ibssid, inwid;
409 u_int8_t zero_bssid[IEEE80211_ADDR_LEN];
411 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
414 memset(&ifr, 0, sizeof(ifr));
415 ifr.ifr_data = (caddr_t)&nwid;
416 (void)strlcpy(ifr.ifr_name, interface, sizeof(ifr.ifr_name));
417 inwid = ioctl(s, SIOCG80211NWID, (caddr_t)&ifr);
419 memset(&bssid, 0, sizeof(bssid));
420 strlcpy(bssid.i_name, interface, sizeof(bssid.i_name));
421 ibssid = ioctl(s, SIOCG80211BSSID, &bssid);
423 if (ibssid != 0 || inwid != 0) {
430 if (nwid.i_len <= IEEE80211_NWID_LEN)
431 len = nwid.i_len + 1;
433 len = IEEE80211_NWID_LEN + 1;
435 strncpy(&info->essid[0], (char *)nwid.i_nwid, len);
436 info->essid[IW_ESSID_MAX_SIZE] = '\0';
437 info->flags |= WIRELESS_INFO_FLAG_HAS_ESSID;
440 /* Signal strength */
442 memset(&zero_bssid, 0, sizeof(zero_bssid));
443 if (ibssid == 0 && memcmp(bssid.i_bssid, zero_bssid, IEEE80211_ADDR_LEN) != 0) {
444 memcpy(&ea.ether_addr_octet, bssid.i_bssid, sizeof(ea.ether_addr_octet));
446 bzero(&nr, sizeof(nr));
447 bcopy(bssid.i_bssid, &nr.nr_macaddr, sizeof(nr.nr_macaddr));
448 strlcpy(nr.nr_ifname, interface, sizeof(nr.nr_ifname));
450 if (ioctl(s, SIOCG80211NODE, &nr) == 0 && nr.nr_rssi) {
451 info->signal_level = nr.nr_rssi;
453 info->signal_level_max = nr.nr_max_rssi;
455 info->flags |= WIRELESS_INFO_FLAG_HAS_SIGNAL;
466 void print_wireless_info(yajl_gen json_gen, char *buffer, const char *interface, const char *format_up, const char *format_down) {
468 char *outwalk = buffer;
469 wireless_info_t info;
473 const char *ip_address = get_ip_addr(interface);
474 if (ip_address == NULL) {
475 START_COLOR("color_bad");
476 outwalk += sprintf(outwalk, "%s", format_down);
480 if (get_wireless_info(interface, &info)) {
482 if (info.flags & WIRELESS_INFO_FLAG_HAS_QUALITY)
483 START_COLOR((info.quality < info.quality_average ? "color_degraded" : "color_good"));
485 START_COLOR((BEGINS_WITH(ip_address, "no IP") ? "color_degraded" : "color_good"));
488 START_COLOR("color_bad");
491 for (; *walk != '\0'; walk++) {
493 *(outwalk++) = *walk;
497 if (BEGINS_WITH(walk + 1, "quality")) {
498 if (info.flags & WIRELESS_INFO_FLAG_HAS_QUALITY) {
499 if (info.quality_max)
500 outwalk += sprintf(outwalk, "%3d%s", PERCENT_VALUE(info.quality, info.quality_max), pct_mark);
502 outwalk += sprintf(outwalk, "%d", info.quality);
506 walk += strlen("quality");
509 if (BEGINS_WITH(walk + 1, "signal")) {
510 if (info.flags & WIRELESS_INFO_FLAG_HAS_SIGNAL) {
511 if (info.signal_level_max)
512 outwalk += sprintf(outwalk, "%3d%s", PERCENT_VALUE(info.signal_level, info.signal_level_max), pct_mark);
514 outwalk += sprintf(outwalk, "%d dBm", info.signal_level);
518 walk += strlen("signal");
521 if (BEGINS_WITH(walk + 1, "noise")) {
522 if (info.flags & WIRELESS_INFO_FLAG_HAS_NOISE) {
523 if (info.noise_level_max)
524 outwalk += sprintf(outwalk, "%3d%s", PERCENT_VALUE(info.noise_level, info.noise_level_max), pct_mark);
526 outwalk += sprintf(outwalk, "%d dBm", info.noise_level);
530 walk += strlen("noise");
533 if (BEGINS_WITH(walk + 1, "essid")) {
534 #ifdef IW_ESSID_MAX_SIZE
535 if (info.flags & WIRELESS_INFO_FLAG_HAS_ESSID)
536 maybe_escape_markup(info.essid, &outwalk);
540 walk += strlen("essid");
543 if (BEGINS_WITH(walk + 1, "frequency")) {
544 if (info.flags & WIRELESS_INFO_FLAG_HAS_FREQUENCY)
545 outwalk += sprintf(outwalk, "%1.1f GHz", info.frequency / 1e9);
548 walk += strlen("frequency");
551 if (BEGINS_WITH(walk + 1, "ip")) {
552 outwalk += sprintf(outwalk, "%s", ip_address);
553 walk += strlen("ip");
557 if (BEGINS_WITH(walk + 1, "bitrate")) {
560 print_bitrate(br_buffer, sizeof(br_buffer), info.bitrate);
562 outwalk += sprintf(outwalk, "%s", br_buffer);
563 walk += strlen("bitrate");
570 OUTPUT_FULL_TEXT(buffer);