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/*
* Copyright (c) 2017, Matias Fontanini
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <iostream>
#include <set>
#include <string>
#include <tins/tins.h>
using std::set;
using std::cout;
using std::endl;
using std::string;
using std::runtime_error;
using namespace Tins;
class BeaconSniffer {
public:
void run(const string& iface);
private:
typedef Dot11::address_type address_type;
typedef set<address_type> ssids_type;
bool callback(PDU& pdu);
ssids_type ssids;
};
void BeaconSniffer::run(const std::string& iface) {
SnifferConfiguration config;
config.set_promisc_mode(true);
config.set_filter("type mgt subtype beacon");
config.set_rfmon(true);
Sniffer sniffer(iface, config);
sniffer.sniff_loop(make_sniffer_handler(this, &BeaconSniffer::callback));
}
bool BeaconSniffer::callback(PDU& pdu) {
// Get the Dot11 layer
const Dot11Beacon& beacon = pdu.rfind_pdu<Dot11Beacon>();
// All beacons must have from_ds == to_ds == 0
if (!beacon.from_ds() && !beacon.to_ds()) {
// Get the AP address
address_type addr = beacon.addr2();
// Look it up in our set
ssids_type::iterator it = ssids.find(addr);
if (it == ssids.end()) {
// First time we encounter this BSSID.
try {
/* If no ssid option is set, then Dot11::ssid will throw
* a std::runtime_error.
*/
string ssid = beacon.ssid();
// Save it so we don't show it again.
ssids.insert(addr);
// Display the tuple "address - ssid".
cout << addr << " - " << ssid << endl;
}
catch (runtime_error&) {
// No ssid, just ignore it.
}
}
}
return true;
}
int main(int argc, char* argv[]) {
if (argc != 2) {
cout << "Usage: " <<* argv << " <interface>" << endl;
return 1;
}
string interface = argv[1];
BeaconSniffer sniffer;
sniffer.run(interface);
}
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