iwlib.h Print BSSID of nearby Access Points - c

Question

So recently I've been looking into Beacon Frames and 802.11 packets in C and came across iwlib.h in Linux. I made a tiny snippet of code to show all nearby networks and their SSID. Here is the code:
#include <stdio.h>
#include <iwlib.h>
int main() {
wireless_scan_head head;
wireless_scan *result;
int sockfd = iw_sockets_open();
iw_get_range_info(sockfd "wlan0", &range);
result = head.result
do {
printf ("%s\n", result->b.essid);
result = result->next;
} while(result != NULL);
return 0;
}
Is there any way of extracting the BSSID/AP MAC address using this code in such a way I can print it like FF:12:34:56:AB:CD or FF123456ABCD? Any help will be much appreciated! Many thanks.

Answer 1

Unfortunately, the support to read the Mac Address is disabled in iwlib, there is an API iw_get_mac_addr() but it's been disabled.
However the MAC address of a specific interface can be easily pulled using its socket descriptor.
The below C example code assumes the interface for WiFi has name "wlp3s0".
#include <stdio.h>
#include <time.h>
#include <iwlib.h>
int main(void) {
wireless_scan_head head;
wireless_scan *result;
iwrange range;
int sock;
struct ifreq s;
sock = iw_sockets_open();
if (iw_get_range_info(sock, "wlp3s0", &range) < 0) {
printf("Error during iw_get_range_info.\n");
exit(2);
}
if (iw_scan(sock, "wlp3s0", range.we_version_compiled, &head) < 0) {
printf("Error during iw_scan.\n");
exit(2);
}
strcpy(s.ifr_name, "wlp3s0");
if (0 == ioctl(sock, SIOCGIFHWADDR, &s)) {
int i;
for (i = 0; i < 6; ++i)
printf("%02x", (unsigned char) s.ifr_addr.sa_data[i]);
puts("\n");
}
result = head.result;
while (NULL != result) {
printf("%s\n", result->b.essid);
result = result->next;
}
exit(0);
}