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	wifi.c - spoon - set dwm status
	git clone git://git.codemadness.org/spoon
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	---
	wifi.c (4257B)
	---
	1 #include <sys/ioctl.h>
	2
	3 #include <err.h>
	4 #include <ifaddrs.h>
	5 #include <stdio.h>
	6 #include <string.h>
	7 #include <unistd.h>
	8
	9 #include "util.h"
	10
	11 void
	12 wifiprint(char *buf, size_t len, int quality)
	13 {
	14 char *icon;
	15
	16 if (quality == 100)
	17 icon = "::";
	18 else if (quality >= 75)
	19 icon = ":.";
	20 else if (quality >= 50)
	21 icon = "..";
	22 else if (quality >= 25)
	23 icon = ". ";
	24 else
	25 icon = " ";
	26 snprintf(buf, len, "%s", icon);
	27 }
	28
	29 #ifdef __OpenBSD__
	30 #include <sys/types.h>
	31 #include <sys/socket.h>
	32 #include <sys/select.h>
	33
	34 #include <net/if.h>
	35 #include <net/if_media.h>
	36 #include <net80211/ieee80211.h>
	37 #include <net80211/ieee80211_ioctl.h>
	38
	39 int
	40 wifiread(void arg, char buf, size_t len)
	41 {
	42 struct ifaddrs ifa, ifas;
	43 struct ifmediareq ifmr;
	44 struct ieee80211_nodereq nr;
	45 struct ieee80211_bssid bssid;
	46 int quality = -1;
	47 int fd, ibssid;
	48
	49 if (getifaddrs(&ifas) < 0) {
	50 warn("getifaddrs");
	51 return -1;
	52 }
	53 fd = socket(AF_INET, SOCK_DGRAM, 0);
	54 if (fd < 0) {
	55 warn("socket");
	56 return -1;
	57 }
	58 for (ifa = ifas; ifa; ifa = ifa->ifa_next) {
	59 memset(&ifmr, 0, sizeof(ifmr));
	60 strlcpy(ifmr.ifm_name, ifa->ifa_name, IF_NAMESIZE);
	61 if (ioctl(fd, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0)
	62 continue;
	63 if ((ifmr.ifm_active & IFM_IEEE80211) == 0)
	64 continue;
	65 if ((ifmr.ifm_active & IFM_IEEE80211_HOSTAP) != 0)
	66 continue;
	67 memset(&bssid, 0, sizeof(bssid));
	68 strlcpy(bssid.i_name, ifa->ifa_name, sizeof(bssid.i_name…
	69 ibssid = ioctl(fd, SIOCG80211BSSID, &bssid);
	70 if (ibssid < 0)
	71 continue;
	72 memset(&nr, 0, sizeof(nr));
	73 memcpy(&nr.nr_macaddr, bssid.i_bssid, sizeof(nr.nr_macad…
	74 strlcpy(nr.nr_ifname, ifa->ifa_name, sizeof(nr.nr_ifname…
	75 if (ioctl(fd, SIOCG80211NODE, &nr) < 0)
	76 continue;
	77 if (nr.nr_rssi == 0)
	78 continue;
	79 if (nr.nr_max_rssi == 0) {
	80 if (nr.nr_rssi <= -100)
	81 quality = 0;
	82 else if (nr.nr_rssi >= -50)
	83 quality = 100;
	84 else
	85 quality = 2 * (nr.nr_rssi + 100);
	86 } else {
	87 quality = IEEE80211_NODEREQ_RSSI(&nr);
	88 }
	89 break;
	90 }
	91 close(fd);
	92 freeifaddrs(ifas);
	93
	94 DPRINTF_D(quality);
	95 if (quality == -1)
	96 return -1;
	97 wifiprint(buf, len, quality);
	98 return 0;
	99 }
	100 #elif __linux__
	101 #include <sys/types.h>
	102 #include <sys/socket.h>
	103
	104 #include <linux/wireless.h>
	105
	106 int
	107 wifiread(void arg, char buf, size_t len)
	108 {
	109 struct ifaddrs ifa, ifas;
	110 struct iw_quality max_qual, qual;
	111 struct iw_statistics stats;
	112 struct iw_range range;
	113 struct iwreq wrq;
	114 int quality = -1;
	115 int level;
	116 int ret, fd;
	117
	118 if (getifaddrs(&ifas) < 0) {
	119 warn("getifaddrs");
	120 return -1;
	121 }
	122 fd = socket(PF_INET, SOCK_DGRAM, 0);
	123 if (fd == -1) {
	124 warn("socket");
	125 return -1;
	126 }
	127 for (ifa = ifas; ifa != NULL; ifa = ifa->ifa_next) {
	128 DPRINTF_S(ifa->ifa_name);
	129 memset(&wrq, 0, sizeof(wrq));
	130 strlcpy(wrq.ifr_name, ifa->ifa_name, IFNAMSIZ);
	131 ret = ioctl(fd, SIOCGIWNAME, &wrq);
	132 if (ret != 0)
	133 continue;
	134 memset(&wrq, 0, sizeof(wrq));
	135 strlcpy(wrq.ifr_name, ifa->ifa_name, IFNAMSIZ);
	136 wrq.u.data.pointer = &range;
	137 wrq.u.data.length = sizeof(range);
	138 memset(&range, 0, sizeof(range));
	139 ret = ioctl(fd, SIOCGIWRANGE, &wrq);
	140 if (ret < 0) {
	141 warnx("cannot get wifi range");
	142 continue;
	143 }
	144 memset(&wrq, 0, sizeof(wrq));
	145 strlcpy(wrq.ifr_name, ifa->ifa_name, IFNAMSIZ);
	146 wrq.u.data.pointer = &stats;
	147 wrq.u.data.length = sizeof(stats);
	148 wrq.u.data.flags = 1;
	149 memset(&stats, 0, sizeof(stats));
	150 ret = ioctl(fd, SIOCGIWSTATS, &wrq);
	151 if (ret < 0) {
	152 warnx("cannot get wifi stats");
	153 continue;
	154 }
	155 max_qual = &range.max_qual;
	156 qual = &stats.qual;
	157 DPRINTF_U(max_qual->qual);
	158 DPRINTF_U(max_qual->level);
	159 DPRINTF_U(qual->qual);
	160 DPRINTF_U(qual->level);
	161 if (max_qual->qual != 0) {
	162 /* driver provides a quality metric */
	163 quality = (((float)qual->qual / max_qual->qual) …
	164 } else if (max_qual->level != 0) {
	165 /* driver provides signal strength (RSSI) */
	166 quality = (((float)qual->level / max_qual->level…
	167 } else if (max_qual->level == 0) {
	168 /* driver provides absolute dBm values */
	169 level = qual->level - 0x100;
	170 if (level <= -100)
	171 quality = 0;
	172 else if (level >= -50)
	173 quality = 100;
	174 else
	175 quality = 2 * (level + 100);
	176 }
	177 break;
	178 }
	179 close(fd);
	180 freeifaddrs(ifas);
	181
	182 DPRINTF_D(quality);
	183 if (quality == -1)
	184 return -1;
	185 wifiprint(buf, len, quality);
	186 return 0;
	187 }
	188 #endif