wifi: OS split

[slstatus.git] / components / Linux / wifi.c

diff --git a/components/Linux/wifi.c b/components/Linux/wifi.c
new file mode 100644 (file)
index 0000000..e86fcbc
--- /dev/null
+++ b/components/Linux/wifi.c
@@ -0,0 +1,90 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <ifaddrs.h>
+#include <linux/wireless.h>
+#include <sys/socket.h>
+#include <stdio.h>
+#include <limits.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+#include "../../util.h"
+
+const char *
+wifi_perc(const char *iface)
+{
+       int i, cur;
+       float perc;
+       int total = 70; /* the max of /proc/net/wireless */
+       char *p, *datastart;
+       char path[PATH_MAX];
+       char status[5];
+       FILE *fp;
+
+       snprintf(path, sizeof(path), "%s%s%s", "/sys/class/net/", iface, "/operstate");
+       fp = fopen(path, "r");
+       if (fp == NULL) {
+               fprintf(stderr, "fopen '%s': %s\n", path, strerror(errno));
+               return NULL;
+       }
+       p = fgets(status, 5, fp);
+       fclose(fp);
+       if(!p || strcmp(status, "up\n") != 0) {
+               return NULL;
+       }
+
+       fp = fopen("/proc/net/wireless", "r");
+       if (fp == NULL) {
+               fprintf(stderr, "fopen '/proc/net/wireless': %s\n", strerror(errno));
+               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, iface)) == NULL)
+               return NULL;
+
+       datastart = (datastart+(strlen(iface)+1));
+       sscanf(datastart + 1, " %*d   %d  %*d  %*d                %*d      %*d          %*d              %*d      %*d            %*d", &cur);
+
+       perc = (float)cur / total * 100.0;
+
+       return bprintf("%.0f", perc);
+}
+
+const char *
+wifi_essid(const char *iface)
+{
+       static char id[IW_ESSID_MAX_SIZE+1];
+       int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
+       struct iwreq wreq;
+
+       memset(&wreq, 0, sizeof(struct iwreq));
+       wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
+       snprintf(wreq.ifr_name, sizeof(wreq.ifr_name), "%s", iface);
+
+       if (sockfd == -1) {
+               fprintf(stderr, "socket 'AF_INET': %s\n", strerror(errno));
+               return NULL;
+       }
+       wreq.u.essid.pointer = id;
+       if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
+               fprintf(stderr, "ioctl 'SIOCGIWESSID': %s\n", strerror(errno));
+               close(sockfd);
+               return NULL;
+       }
+
+       close(sockfd);
+
+       if (strcmp(id, "") == 0)
+               return NULL;
+       else
+               return id;
+}