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	tAdd plugin to show wifi signal strength - spoon - dwm status utility (2f30 for…
	git clone git://src.adamsgaard.dk/spoon
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	---
	commit 192d94ee41b5c6c7c9285e26cf2a070a36b7234e
	parent 4f0e5a724a9a5263f2381d2496ac64206a29823e
	Author: sin <[email protected]>
	Date: Mon, 16 May 2016 19:03:14 +0100

	Add plugin to show wifi signal strength

	Only works on OpenBSD.

	Diffstat:
	M spoon.c \| 98 +++++++++++++++++++++++++++++…

	1 file changed, 98 insertions(+), 0 deletions(-)
	---
	diff --git a/spoon.c b/spoon.c
	t@@ -17,6 +17,7 @@
	int dummyread(char *buf, size_t len);
	int mpdread(char *buf, size_t len);
	int battread(char *buf, size_t len);
	+int wifiread(char *buf, size_t len);
	int dateread(char *buf, size_t len);
	int xkblayoutread(char *buf, size_t len);

	t@@ -28,6 +29,7 @@ struct ent {
	{ .fmt = "[%s] ", .read = mpdread },
	{ .fmt = "[%s] ", .read = xkblayoutread },
	{ .fmt = "[%s%%] ", .read = battread },
	+ { .fmt = "[%s%%] ", .read = wifiread },
	{ .fmt = "%s", .read = dateread },
	};

	t@@ -74,8 +76,19 @@ out:
	}

	#ifdef __OpenBSD__
	+#include <sys/types.h>
	+#include <sys/socket.h>
	#include <sys/ioctl.h>
	+
	+#include <net/if.h>
	+#include <net/if_media.h>
	+#include <net80211/ieee80211.h>
	+#include <net80211/ieee80211_ioctl.h>
	+
	#include <fcntl.h>
	+#include <ifaddrs.h>
	+#include <limits.h>
	+
	#include <machine/apmvar.h>

	int
	t@@ -99,12 +112,97 @@ battread(char *buf, size_t len)
	snprintf(buf, len, "%d", info.battery_life);
	return 0;
	}
	+
	+int
	+wifiread(char *buf, size_t len)
	+{
	+ struct ifaddrs ifa, ifas;
	+ struct ifmediareq ifmr;
	+ struct ieee80211_nodereq nr;
	+ struct ieee80211_bssid bssid;
	+ int s, ibssid, quality;
	+
	+ if (getifaddrs(&ifas) < 0) {
	+ warn("getifaddrs");
	+ return -1;
	+ }
	+
	+ for (ifa = ifas; ifa; ifa = ifa->ifa_next) {
	+ s = socket(AF_INET, SOCK_DGRAM, 0);
	+ if (s < 0) {
	+ warn("socket");
	+ continue;
	+ }
	+
	+ memset(&ifmr, 0, sizeof(ifmr));
	+ strlcpy(ifmr.ifm_name, ifa->ifa_name, IF_NAMESIZE);
	+ if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
	+ close(s);
	+ continue;
	+ }
	+
	+ if ((ifmr.ifm_active & IFM_IEEE80211) == 0) {
	+ close(s);
	+ continue;
	+ }
	+
	+ if ((ifmr.ifm_active & IFM_IEEE80211_HOSTAP) != 0) {
	+ close(s);
	+ continue;
	+ }
	+
	+ memset(&bssid, 0, sizeof(bssid));
	+ strlcpy(bssid.i_name, ifa->ifa_name, sizeof(bssid.i_name));
	+ ibssid = ioctl(s, SIOCG80211BSSID, &bssid);
	+ if (ibssid < 0) {
	+ close(s);
	+ continue;
	+ }
	+
	+ memset(&nr, 0, sizeof(nr));
	+ memcpy(&nr.nr_macaddr, bssid.i_bssid, sizeof(nr.nr_macaddr));
	+ strlcpy(nr.nr_ifname, ifa->ifa_name, sizeof(nr.nr_ifname));
	+ if (ioctl(s, SIOCG80211NODE, &nr) < 0) {
	+ close(s);
	+ continue;
	+ }
	+
	+ if (nr.nr_rssi == 0) {
	+ close(s);
	+ continue;
	+ }
	+
	+ if (nr.nr_max_rssi == 0) {
	+ if (nr.nr_rssi <= -100)
	+ quality = 0;
	+ else if (nr.nr_rssi >= -50)
	+ quality = 100;
	+ else
	+ quality = 2 * (nr.nr_rssi + 100);
	+ } else {
	+ quality = IEEE80211_NODEREQ_RSSI(&nr);
	+ }
	+
	+ snprintf(buf, len, "%u", quality);
	+ break;
	+ }
	+ freeifaddrs(ifas);
	+ if (ifa)
	+ return 0;
	+ return -1;
	+}
	#else
	int
	battread(char *buf, size_t len)
	{
	return -1;
	}
	+
	+int
	+wifiread(char *buf, size_t len)
	+{
	+ return -1;
	+}
	#endif

	int