/* See LICENSE file for copyright and license details. */
-#include <errno.h>
#include <ifaddrs.h>
#include <stdio.h>
#include <string.h>
char status[5];
FILE *fp;
- snprintf(path, sizeof(path), "%s%s%s", "/sys/class/net/", iface,
- "/operstate");
+ if (esnprintf(path, sizeof(path),
+ "/sys/class/net/%s/operstate",
+ iface) < 0) {
+ return NULL;
+ }
if (!(fp = fopen(path, "r"))) {
warn("fopen '%s':", path);
return NULL;
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 (esnprintf(wreq.ifr_name, sizeof(wreq.ifr_name),
+ "%s", iface) < 0) {
+ return NULL;
+ }
if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
warn("socket 'AF_INET':");
{
struct ieee80211_bssid bssid;
int sockfd;
+ uint8_t zero_bssid[IEEE80211_ADDR_LEN];
memset(&bssid, 0, sizeof(bssid));
memset(nr, 0, sizeof(struct ieee80211_nodereq));
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, iface, sizeof(nr->nr_ifname));
memcpy(&nr->nr_macaddr, bssid.i_bssid, sizeof(nr->nr_macaddr));
if ((ioctl(sockfd, SIOCG80211NODE, nr)) < 0 && nr->nr_rssi) {