Reading AP(Access Point) Table

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Article

Created: spark55 (10 Sep 2007)

Last edited: hamishwillee (27 Jul 2012)

void ReadAPTable()
{
	struct ifconf ifc;
	int sockfd;
 
	sockfd = socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
 
	ifc.ifc_len = sizeof(ifreq) * 20;
	ifc.ifc_buf = (caddr_t)malloc( ifc.ifc_len );
 
 	// This will get the whole access points list
        // Here, ifc.ifc_len will contain the size of the buffer
       ret = ioctl(sockfd, SIOCGIFCONF, &ifc);
       // count will contain the number of access points
       count = ifc.ifc_len / sizeof(struct ifreq) ; 
 
	// This will get only the active connection list 
	ret = ioctl(sockfd, SIOCGIFACTIVECONF, &ifc); 
 
	close(sockfd);
	free(ifc.ifc_buf);
	return;
}

The above Open C code shows that, we can either read the whole access points details(SIOCGIFCONF ) or only read active access points details(SIOCGIFACTIVECONF ).

Links

• Start new Socket Connection to Access Point

• Start new Socket Sub-connection to Access Point

• Socket Connection to an IP Address

• OpenC Networking and Socket into Developer Library