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 char essid[IW_ESSID_MAX_SIZE + 1];
80 uint8_t bssid[ETH_ALEN];
94 // Like iw_print_bitrate, but without the dependency on libiw.
95 static void print_bitrate(char *buffer, int buflen, int bitrate) {
100 const double rate = bitrate;
107 } else if (rate >= mega) {
114 snprintf(buffer, buflen, "%g %cb/s", rate / divisor, scale);
117 // Based on NetworkManager/src/platform/wifi/wifi-utils-nl80211.c
118 static uint32_t nl80211_xbm_to_percent(int32_t xbm, int32_t divisor) {
119 #define NOISE_FLOOR_DBM -90
120 #define SIGNAL_MAX_DBM -20
123 if (xbm < NOISE_FLOOR_DBM)
124 xbm = NOISE_FLOOR_DBM;
125 if (xbm > SIGNAL_MAX_DBM)
126 xbm = SIGNAL_MAX_DBM;
128 return 100 - 70 * (((float)SIGNAL_MAX_DBM - (float)xbm) / ((float)SIGNAL_MAX_DBM - (float)NOISE_FLOOR_DBM));
131 // Based on NetworkManager/src/platform/wifi/wifi-utils-nl80211.c
132 static void find_ssid(uint8_t *ies, uint32_t ies_len, uint8_t **ssid, uint32_t *ssid_len) {
133 #define WLAN_EID_SSID 0
137 while (ies_len > 2 && ies[0] != WLAN_EID_SSID) {
138 ies_len -= ies[1] + 2;
143 if (ies_len < (uint32_t)(2 + ies[1]))
150 static int gwi_sta_cb(struct nl_msg *msg, void *data) {
151 wireless_info_t *info = data;
153 struct nlattr *tb[NL80211_ATTR_MAX + 1];
154 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
155 struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
156 struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
157 static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
158 [NL80211_STA_INFO_RX_BITRATE] = {.type = NLA_NESTED},
161 static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
162 [NL80211_RATE_INFO_BITRATE] = {.type = NLA_U16},
165 if (nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL) < 0)
168 if (tb[NL80211_ATTR_STA_INFO] == NULL)
171 if (nla_parse_nested(sinfo, NL80211_STA_INFO_MAX, tb[NL80211_ATTR_STA_INFO], stats_policy))
174 if (sinfo[NL80211_STA_INFO_RX_BITRATE] == NULL)
177 if (nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX, sinfo[NL80211_STA_INFO_RX_BITRATE], rate_policy))
180 if (rinfo[NL80211_RATE_INFO_BITRATE] == NULL)
183 // NL80211_RATE_INFO_BITRATE is specified in units of 100 kbit/s, but iw
184 // used to specify bit/s, so we convert to use the same code path.
185 info->bitrate = (int)nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]) * 100 * 1000;
190 static int gwi_scan_cb(struct nl_msg *msg, void *data) {
191 wireless_info_t *info = data;
192 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
193 struct nlattr *tb[NL80211_ATTR_MAX + 1];
194 struct nlattr *bss[NL80211_BSS_MAX + 1];
195 struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
196 [NL80211_BSS_FREQUENCY] = {.type = NLA_U32},
197 [NL80211_BSS_BSSID] = {.type = NLA_UNSPEC},
198 [NL80211_BSS_INFORMATION_ELEMENTS] = {.type = NLA_UNSPEC},
199 [NL80211_BSS_SIGNAL_MBM] = {.type = NLA_U32},
200 [NL80211_BSS_SIGNAL_UNSPEC] = {.type = NLA_U8},
201 [NL80211_BSS_STATUS] = {.type = NLA_U32},
204 if (nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL) < 0)
207 if (tb[NL80211_ATTR_BSS] == NULL)
210 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], bss_policy))
213 if (bss[NL80211_BSS_STATUS] == NULL)
216 const uint32_t status = nla_get_u32(bss[NL80211_BSS_STATUS]);
218 if (status != NL80211_BSS_STATUS_ASSOCIATED &&
219 status != NL80211_BSS_STATUS_IBSS_JOINED)
222 if (bss[NL80211_BSS_BSSID] == NULL)
225 memcpy(info->bssid, nla_data(bss[NL80211_BSS_BSSID]), ETH_ALEN);
227 if (bss[NL80211_BSS_FREQUENCY]) {
228 info->flags |= WIRELESS_INFO_FLAG_HAS_FREQUENCY;
229 info->frequency = (double)nla_get_u32(bss[NL80211_BSS_FREQUENCY]) * 1e6;
232 if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
233 info->flags |= WIRELESS_INFO_FLAG_HAS_SIGNAL;
234 info->signal_level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
235 info->signal_level_max = 100;
237 info->flags |= WIRELESS_INFO_FLAG_HAS_QUALITY;
238 info->quality = info->signal_level;
239 info->quality_max = 100;
240 info->quality_average = 50;
243 if (bss[NL80211_BSS_SIGNAL_MBM]) {
244 info->flags |= WIRELESS_INFO_FLAG_HAS_SIGNAL;
245 info->signal_level = (int)nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]) / 100;
247 info->flags |= WIRELESS_INFO_FLAG_HAS_QUALITY;
248 info->quality = nl80211_xbm_to_percent(nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]), 100);
249 info->quality_max = 100;
250 info->quality_average = 50;
253 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
257 find_ssid(nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]),
258 nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]),
260 if (ssid && ssid_len) {
261 info->flags |= WIRELESS_INFO_FLAG_HAS_ESSID;
262 snprintf(info->essid, sizeof(info->essid), "%.*s", ssid_len, ssid);
270 static int get_wireless_info(const char *interface, wireless_info_t *info) {
271 memset(info, 0, sizeof(wireless_info_t));
274 struct nl_sock *sk = nl_socket_alloc();
275 if (genl_connect(sk) != 0)
278 if (nl_socket_modify_cb(sk, NL_CB_VALID, NL_CB_CUSTOM, gwi_scan_cb, info) < 0)
281 const int nl80211_id = genl_ctrl_resolve(sk, "nl80211");
285 const unsigned int ifidx = if_nametoindex(interface);
289 struct nl_msg *msg = NULL;
290 if ((msg = nlmsg_alloc()) == NULL)
293 if (!genlmsg_put(msg, NL_AUTO_PORT, NL_AUTO_SEQ, nl80211_id, 0, NLM_F_DUMP, NL80211_CMD_GET_SCAN, 0) ||
294 nla_put_u32(msg, NL80211_ATTR_IFINDEX, ifidx) < 0)
297 if (nl_send_sync(sk, msg) < 0)
298 // nl_send_sync calls nlmsg_free()
302 if (nl_socket_modify_cb(sk, NL_CB_VALID, NL_CB_CUSTOM, gwi_sta_cb, info) < 0)
305 if ((msg = nlmsg_alloc()) == NULL)
308 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)
311 if (nl_send_sync(sk, msg) < 0)
312 // nl_send_sync calls nlmsg_free()
326 #if defined(__FreeBSD__) || defined(__DragonFly__)
329 struct ieee80211req_sta_req req;
330 uint8_t buf[24 * 1024];
332 struct ieee80211req na;
333 char bssid[IEEE80211_ADDR_LEN];
336 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
339 memset(&na, 0, sizeof(na));
340 strlcpy(na.i_name, interface, sizeof(na.i_name));
341 na.i_type = IEEE80211_IOC_SSID;
342 na.i_data = &info->essid[0];
343 na.i_len = IEEE80211_NWID_LEN + 1;
344 if ((inwid = ioctl(s, SIOCG80211, (caddr_t)&na)) == -1) {
349 if (na.i_len <= IEEE80211_NWID_LEN)
352 len = IEEE80211_NWID_LEN + 1;
353 info->essid[len - 1] = '\0';
358 info->flags |= WIRELESS_INFO_FLAG_HAS_ESSID;
360 memset(&na, 0, sizeof(na));
361 strlcpy(na.i_name, interface, sizeof(na.i_name));
362 na.i_type = IEEE80211_IOC_BSSID;
364 na.i_len = sizeof(bssid);
366 if (ioctl(s, SIOCG80211, (caddr_t)&na) == -1) {
371 memcpy(u.req.is_u.macaddr, bssid, sizeof(bssid));
372 memset(&na, 0, sizeof(na));
373 strlcpy(na.i_name, interface, sizeof(na.i_name));
374 na.i_type = IEEE80211_IOC_STA_INFO;
376 na.i_len = sizeof(u);
378 if (ioctl(s, SIOCG80211, (caddr_t)&na) == -1) {
384 if (na.i_len >= sizeof(u.req)) {
386 * Just use the first BSSID returned even if there are
387 * multiple APs sharing the same BSSID.
389 info->signal_level = u.req.info[0].isi_rssi / 2 +
390 u.req.info[0].isi_noise;
391 info->flags |= WIRELESS_INFO_FLAG_HAS_SIGNAL;
392 info->noise_level = u.req.info[0].isi_noise;
393 info->flags |= WIRELESS_INFO_FLAG_HAS_NOISE;
400 struct ieee80211_bssid bssid;
401 struct ieee80211_nwid nwid;
402 struct ieee80211_nodereq nr;
404 struct ether_addr ea;
406 int s, len, ibssid, inwid;
407 u_int8_t zero_bssid[IEEE80211_ADDR_LEN];
409 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
412 memset(&ifr, 0, sizeof(ifr));
413 ifr.ifr_data = (caddr_t)&nwid;
414 (void)strlcpy(ifr.ifr_name, interface, sizeof(ifr.ifr_name));
415 inwid = ioctl(s, SIOCG80211NWID, (caddr_t)&ifr);
417 memset(&bssid, 0, sizeof(bssid));
418 strlcpy(bssid.i_name, interface, sizeof(bssid.i_name));
419 ibssid = ioctl(s, SIOCG80211BSSID, &bssid);
421 if (ibssid != 0 || inwid != 0) {
428 if (nwid.i_len <= IEEE80211_NWID_LEN)
429 len = nwid.i_len + 1;
431 len = IEEE80211_NWID_LEN + 1;
433 strncpy(&info->essid[0], (char *)nwid.i_nwid, len);
434 info->essid[IW_ESSID_MAX_SIZE] = '\0';
435 info->flags |= WIRELESS_INFO_FLAG_HAS_ESSID;
438 /* Signal strength */
440 memset(&zero_bssid, 0, sizeof(zero_bssid));
441 if (ibssid == 0 && memcmp(bssid.i_bssid, zero_bssid, IEEE80211_ADDR_LEN) != 0) {
442 memcpy(&ea.ether_addr_octet, bssid.i_bssid, sizeof(ea.ether_addr_octet));
444 bzero(&nr, sizeof(nr));
445 bcopy(bssid.i_bssid, &nr.nr_macaddr, sizeof(nr.nr_macaddr));
446 strlcpy(nr.nr_ifname, interface, sizeof(nr.nr_ifname));
448 if (ioctl(s, SIOCG80211NODE, &nr) == 0 && nr.nr_rssi) {
449 info->signal_level = nr.nr_rssi;
451 info->signal_level_max = nr.nr_max_rssi;
453 info->flags |= WIRELESS_INFO_FLAG_HAS_SIGNAL;
464 void print_wireless_info(yajl_gen json_gen, char *buffer, const char *interface, const char *format_up, const char *format_down) {
466 char *outwalk = buffer;
467 wireless_info_t info;
471 const char *ip_address = get_ip_addr(interface);
472 if (ip_address == NULL) {
473 START_COLOR("color_bad");
474 outwalk += sprintf(outwalk, "%s", format_down);
478 if (get_wireless_info(interface, &info)) {
480 if (info.flags & WIRELESS_INFO_FLAG_HAS_QUALITY)
481 START_COLOR((info.quality < info.quality_average ? "color_degraded" : "color_good"));
483 START_COLOR((BEGINS_WITH(ip_address, "no IP") ? "color_degraded" : "color_good"));
486 START_COLOR("color_bad");
489 for (; *walk != '\0'; walk++) {
491 *(outwalk++) = *walk;
495 if (BEGINS_WITH(walk + 1, "quality")) {
496 if (info.flags & WIRELESS_INFO_FLAG_HAS_QUALITY) {
497 if (info.quality_max)
498 outwalk += sprintf(outwalk, "%03d%s", PERCENT_VALUE(info.quality, info.quality_max), pct_mark);
500 outwalk += sprintf(outwalk, "%d", info.quality);
504 walk += strlen("quality");
507 if (BEGINS_WITH(walk + 1, "signal")) {
508 if (info.flags & WIRELESS_INFO_FLAG_HAS_SIGNAL) {
509 if (info.signal_level_max)
510 outwalk += sprintf(outwalk, "%03d%s", PERCENT_VALUE(info.signal_level, info.signal_level_max), pct_mark);
512 outwalk += sprintf(outwalk, "%d dBm", info.signal_level);
516 walk += strlen("signal");
519 if (BEGINS_WITH(walk + 1, "noise")) {
520 if (info.flags & WIRELESS_INFO_FLAG_HAS_NOISE) {
521 if (info.noise_level_max)
522 outwalk += sprintf(outwalk, "%03d%s", PERCENT_VALUE(info.noise_level, info.noise_level_max), pct_mark);
524 outwalk += sprintf(outwalk, "%d dBm", info.noise_level);
528 walk += strlen("noise");
531 if (BEGINS_WITH(walk + 1, "essid")) {
532 if (info.flags & WIRELESS_INFO_FLAG_HAS_ESSID)
533 maybe_escape_markup(info.essid, &outwalk);
536 walk += strlen("essid");
539 if (BEGINS_WITH(walk + 1, "frequency")) {
540 if (info.flags & WIRELESS_INFO_FLAG_HAS_FREQUENCY)
541 outwalk += sprintf(outwalk, "%1.1f GHz", info.frequency / 1e9);
544 walk += strlen("frequency");
547 if (BEGINS_WITH(walk + 1, "ip")) {
548 outwalk += sprintf(outwalk, "%s", ip_address);
549 walk += strlen("ip");
553 if (BEGINS_WITH(walk + 1, "bitrate")) {
556 print_bitrate(br_buffer, sizeof(br_buffer), info.bitrate);
558 outwalk += sprintf(outwalk, "%s", br_buffer);
559 walk += strlen("bitrate");
566 OUTPUT_FULL_TEXT(buffer);