slstatus/components/wifi.c

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/* See LICENSE file for copyright and license details. */
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#include <ifaddrs.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
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#include <unistd.h>
#include "../util.h"
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#define RSSI_TO_PERC(rssi) \
rssi >= -50 ? 100 : \
(rssi <= -100 ? 0 : \
(2 * (rssi + 100)))
#if defined(__linux__)
#include <limits.h>
#include <linux/wireless.h>
const char *
wifi_perc(const char *interface)
{
int cur;
size_t i;
char *p, *datastart;
char path[PATH_MAX];
char status[5];
FILE *fp;
if (esnprintf(path, sizeof(path), "/sys/class/net/%s/operstate",
interface) < 0) {
return NULL;
}
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if (!(fp = fopen(path, "r"))) {
warn("fopen '%s':", path);
return NULL;
}
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p = fgets(status, 5, fp);
fclose(fp);
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if (!p || strcmp(status, "up\n") != 0) {
return NULL;
}
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if (!(fp = fopen("/proc/net/wireless", "r"))) {
warn("fopen '/proc/net/wireless':");
return NULL;
}
for (i = 0; i < 3; i++) {
if (!(p = fgets(buf, sizeof(buf) - 1, fp)))
break;
}
fclose(fp);
if (i < 2 || !p) {
return NULL;
}
if (!(datastart = strstr(buf, interface))) {
return NULL;
}
datastart = (datastart+(strlen(interface)+1));
sscanf(datastart + 1, " %*d %d %*d %*d\t\t %*d\t "
"%*d\t\t%*d\t\t %*d\t %*d\t\t %*d", &cur);
/* 70 is the max of /proc/net/wireless */
return bprintf("%d", (int)((float)cur / 70 * 100));
}
const char *
wifi_essid(const char *interface)
{
static char id[IW_ESSID_MAX_SIZE+1];
int sockfd;
struct iwreq wreq;
memset(&wreq, 0, sizeof(struct iwreq));
wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
if (esnprintf(wreq.ifr_name, sizeof(wreq.ifr_name), "%s",
interface) < 0) {
return NULL;
}
if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
warn("socket 'AF_INET':");
return NULL;
}
wreq.u.essid.pointer = id;
if (ioctl(sockfd,SIOCGIWESSID, &wreq) < 0) {
warn("ioctl 'SIOCGIWESSID':");
close(sockfd);
return NULL;
}
close(sockfd);
if (!strcmp(id, "")) {
return NULL;
}
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return id;
}
#elif defined(__OpenBSD__)
#include <net/if.h>
#include <net/if_media.h>
#include <net80211/ieee80211.h>
#include <sys/select.h> /* before <sys/ieee80211_ioctl.h> for NBBY */
#include <net80211/ieee80211_ioctl.h>
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#include <stdlib.h>
#include <sys/types.h>
static int
load_ieee80211_nodereq(const char *interface, struct ieee80211_nodereq *nr)
{
struct ieee80211_bssid bssid;
int sockfd;
uint8_t zero_bssid[IEEE80211_ADDR_LEN];
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memset(&bssid, 0, sizeof(bssid));
memset(nr, 0, sizeof(struct ieee80211_nodereq));
if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
warn("socket 'AF_INET':");
return 0;
}
strlcpy(bssid.i_name, interface, sizeof(bssid.i_name));
if ((ioctl(sockfd, SIOCG80211BSSID, &bssid)) < 0) {
warn("ioctl 'SIOCG80211BSSID':");
close(sockfd);
return 0;
}
memset(&zero_bssid, 0, sizeof(zero_bssid));
if (memcmp(bssid.i_bssid, zero_bssid,
IEEE80211_ADDR_LEN) == 0) {
close(sockfd);
return 0;
}
strlcpy(nr->nr_ifname, interface, sizeof(nr->nr_ifname));
memcpy(&nr->nr_macaddr, bssid.i_bssid, sizeof(nr->nr_macaddr));
if ((ioctl(sockfd, SIOCG80211NODE, nr)) < 0 && nr->nr_rssi) {
warn("ioctl 'SIOCG80211NODE':");
close(sockfd);
return 0;
}
return close(sockfd), 1;
}
const char *
wifi_perc(const char *interface)
{
struct ieee80211_nodereq nr;
int q;
if (load_ieee80211_nodereq(interface, &nr)) {
if (nr.nr_max_rssi) {
q = IEEE80211_NODEREQ_RSSI(&nr);
} else {
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q = RSSI_TO_PERC(nr.nr_rssi);
}
return bprintf("%d", q);
}
return NULL;
}
const char *
wifi_essid(const char *interface)
{
struct ieee80211_nodereq nr;
if (load_ieee80211_nodereq(interface, &nr)) {
return bprintf("%s", nr.nr_nwid);
}
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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 type, size_t *len)
{
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_BSSID, &len))
{
/* 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, IEEE80211_IOC_STA_INFO, &len)) {
rssi_dbm = info.sta.info[0].isi_noise +
info.sta.info[0].isi_rssi / 2;
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_SSID, &len )) {
if (len < sizeof(ssid))
len += 1;
else
len = sizeof(ssid);
ssid[len - 1] = '\0';
return bprintf("%s", ssid);
}
return NULL;
}
#endif