Sniffer::Sniffer(const string& device,
promisc_type promisc,
const string& filter,
bool rfmon) {
SnifferConfiguration configuration;
configuration.set_promisc_mode(promisc == PROMISC);
configuration.set_filter(filter);
configuration.set_rfmon(rfmon);
char error[PCAP_ERRBUF_SIZE];
pcap_t* phandle = pcap_create(TINS_PREFIX_INTERFACE(device).c_str(), error);
if (!phandle) {
throw runtime_error(error);
}
set_pcap_handle(phandle);
// Set the netmask if we are able to find it.
bpf_u_int32 ip, if_mask;
if (pcap_lookupnet(TINS_PREFIX_INTERFACE(device).c_str(), &ip, &if_mask, error) == 0) {
set_if_mask(if_mask);
}
// Configure the sniffer's attributes prior to activation.
configuration.configure_sniffer_pre_activation(*this);
// Finally, activate the pcap. In case of error throw runtime_error
if (pcap_activate(get_pcap_handle()) < 0) {
throw pcap_error(pcap_geterr(get_pcap_handle()));
}
// Configure the sniffer's attributes after activation.
configuration.configure_sniffer_post_activation(*this);
}
void receive_probe_requests(NetworkInterface iface) {
SnifferConfiguration config;
config.set_rfmon(true);
config.set_filter("type mgt subtype probe-req || type data subtype null");
Sniffer sniffer(iface.name(), config);
while(true) process(sniffer.next_packet());
}
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));
}