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	wifi component on FreeBSD - slstatus - status monitor
	git clone git://git.suckless.org/slstatus
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	---
	commit e724907cc37749907cb8c63031d9fb35ef46a657
	parent 86849d295b1eb9e18746d8a4fa196fe7b9dce0dc
	Author: Michael Buch <[email protected]>
	Date: Wed, 13 Feb 2019 00:47:23 +0000

	wifi component on FreeBSD

	Diffstat:
	M components/wifi.c \| 98 +++++++++++++++++++++++++++++…

	1 file changed, 95 insertions(+), 3 deletions(-)
	---
	diff --git a/components/wifi.c b/components/wifi.c
	@@ -8,6 +8,11 @@

	#include "../util.h"

	+#define RSSI_TO_PERC(rssi) \
	+ rssi >= -50 ? 100 : \
	+ (rssi <= -100 ? 0 : \
	+ (2 * (rssi + 100)))
	+
	#if defined(__linux__)
	#include <limits.h>
	#include <linux/wireless.h>
	@@ -150,9 +155,7 @@
	if (nr.nr_max_rssi) {
	q = IEEE80211_NODEREQ_RSSI(&nr);
	} else {
	- q = nr.nr_rssi >= -50 ? 100 :
	- (nr.nr_rssi <= -100 ? 0 :
	- (2 * (nr.nr_rssi + 100)));
	+ q = RSSI_TO_PERC(nr.nr_rssi);
	}
	return bprintf("%d", q);
	}
	@@ -171,4 +174,93 @@

	return NULL;
	}
	+#elif defined(__FreeBSD__)
	+ #include <net/if.h>
	+ #include <net80211/ieee80211_ioctl.h>
	+
	+ int
	+ load_ieee80211req(int sock, const char interface, void data, int typ…
	+ {
	+ char warn_buf[256];
	+ struct ieee80211req ireq;
	+ memset(&ireq, 0, sizeof(ireq));
	+ ireq.i_type = type;
	+ ireq.i_data = (caddr_t) data;
	+ ireq.i_len = *len;
	+
	+ strlcpy(ireq.i_name, interface, sizeof(ireq.i_name));
	+ if (ioctl(sock, SIOCG80211, &ireq) < 0) {
	+ snprintf(warn_buf, sizeof(warn_buf),
	+ "ioctl: 'SIOCG80211': %d", type);
	+ warn(warn_buf);
	+ return 0;
	+ }
	+
	+ *len = ireq.i_len;
	+ return 1;
	+ }
	+
	+ const char *
	+ wifi_perc(const char *interface)
	+ {
	+ union {
	+ struct ieee80211req_sta_req sta;
	+ uint8_t buf[24 * 1024];
	+ } info;
	+ uint8_t bssid[IEEE80211_ADDR_LEN];
	+ int rssi_dbm;
	+ int sockfd;
	+ size_t len;
	+
	+ if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
	+ warn("socket 'AF_INET':");
	+ return 0;
	+ }
	+
	+ /* Retreive MAC address of interface */
	+ len = IEEE80211_ADDR_LEN;
	+ if (load_ieee80211req(sockfd, interface, &bssid, IEEE80211_IOC…
	+ {
	+ /* Retrieve info on station with above BSSID */
	+ memset(&info, 0, sizeof(info));
	+ memcpy(info.sta.is_u.macaddr, bssid, sizeof(bssid));
	+
	+ len = sizeof(info);
	+ if (load_ieee80211req(sockfd, interface, &info, IEEE80…
	+ rssi_dbm = info.sta.info[0].isi_noise +
	+ info.sta.info[0].isi_rssi / …
	+ return bprintf("%d", RSSI_TO_PERC(rssi_dbm));
	+ }
	+ }
	+
	+ close(sockfd);
	+ return NULL;
	+ }
	+
	+ const char *
	+ wifi_essid(const char *interface)
	+ {
	+ char ssid[IEEE80211_NWID_LEN + 1];
	+ size_t len;
	+ int sockfd;
	+
	+ if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
	+ warn("socket 'AF_INET':");
	+ return 0;
	+ }
	+
	+ len = sizeof(ssid);
	+ memset(&ssid, 0, len);
	+ if (load_ieee80211req(sockfd, interface, &ssid, IEEE80211_IOC_…
	+ if (len < sizeof(ssid))
	+ len += 1;
	+ else
	+ len = sizeof(ssid);
	+
	+ ssid[len - 1] = '\0';
	+ return bprintf("%s", ssid);
	+ }
	+
	+ return NULL;
	+ }
	#endif