static int
handle_beacon(const u_char *p)
{
struct mgmt_body_t pbody;
int offset = 0;
memset(&pbody, 0, sizeof(pbody));
if (!TTEST2(*p, IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN +
IEEE802_11_CAPINFO_LEN))
return 0;
memcpy(&pbody.timestamp, p, IEEE802_11_TSTAMP_LEN);
offset += IEEE802_11_TSTAMP_LEN;
pbody.beacon_interval = EXTRACT_LE_16BITS(p+offset);
offset += IEEE802_11_BCNINT_LEN;
pbody.capability_info = EXTRACT_LE_16BITS(p+offset);
offset += IEEE802_11_CAPINFO_LEN;
parse_elements(&pbody, p, offset);
PRINT_SSID(pbody);
PRINT_RATES(pbody);
printf(" %s",
CAPABILITY_ESS(pbody.capability_info) ? "ESS" : "IBSS");
PRINT_DS_CHANNEL(pbody);
return 1;
}
static int
handle_beacon(const u_char *p)
{
struct mgmt_body_t pbody;
int offset = 0;
memset(&pbody, 0, sizeof(pbody));
if (!TTEST2(*p, IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN +
IEEE802_11_CAPINFO_LEN))
return 0;
memcpy(&pbody.timestamp, p, 8);
offset += IEEE802_11_TSTAMP_LEN;
pbody.beacon_interval = EXTRACT_LE_16BITS(p+offset);
offset += IEEE802_11_BCNINT_LEN;
pbody.capability_info = EXTRACT_LE_16BITS(p+offset);
offset += IEEE802_11_CAPINFO_LEN;
if (!parse_elements(&pbody, p, offset))
return 0;
printf(" (");
fn_print(pbody.ssid.ssid, NULL);
printf(")");
PRINT_RATES(pbody);
printf(" %s CH: %u%s",
CAPABILITY_ESS(pbody.capability_info) ? "ESS" : "IBSS",
pbody.ds.channel,
CAPABILITY_PRIVACY(pbody.capability_info) ? ", PRIVACY" : "" );
return 1;
}
int handle_beacon(const uchar *p, u_int length, struct rcv_pkt * paket)
{
struct mgmt_body_t pbody;
int offset = 0;
int ret;
memset(&pbody, 0, sizeof(pbody));
if (!TTEST2(*p, IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN + IEEE802_11_CAPINFO_LEN))
return 0;
if (length < IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN +
IEEE802_11_CAPINFO_LEN)
return 0;
memcpy(&pbody.timestamp, p, IEEE802_11_TSTAMP_LEN);
offset += IEEE802_11_TSTAMP_LEN;
length -= IEEE802_11_TSTAMP_LEN;
pbody.beacon_interval = EXTRACT_LE_16BITS(p+offset);
offset += IEEE802_11_BCNINT_LEN;
length -= IEEE802_11_BCNINT_LEN;
pbody.capability_info = EXTRACT_LE_16BITS(p+offset);
offset += IEEE802_11_CAPINFO_LEN;
length -= IEEE802_11_CAPINFO_LEN;
ret = parse_elements(&pbody, p, offset, length,paket);
if (pbody.ssid_present) {
fn_print(pbody.ssid.ssid, NULL,paket);
}
if (pbody.ds_present) {
paket->p.mgmt_pkt.channel=pbody.ds.channel;
// printf("packet channel = %d\n",pbody.ds.channel);
}
paket->p.mgmt_pkt.cap_privacy= CAPABILITY_PRIVACY(pbody.capability_info) ? 1 :0 ;
// printf("%s \n", CAPABILITY_ESS(pbody.capability_info) ? "ESS" : "IBSS");
u_int8_t _r;
if (pbody.rates_present) {
_r= pbody.rates.rate[pbody.rates.length -1] ;
paket->p.mgmt_pkt.rate_max=(float)((.5 * ((_r) & 0x7f)));
// printf("packet rate is %f \n", paket->p.mgmt_pkt.rate_max);
}
else {
paket->p.mgmt_pkt.rate_max=0.0; // undefined rate, because of bad fcs (might be a reason)
}
paket->p.mgmt_pkt.cap_ess_ibss = paket->p.mgmt_pkt.cap_ess_ibss= CAPABILITY_ESS(pbody.capability_info) ? 1:2;
return ret;
}