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airodump-ng.c
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airodump-ng.c
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/*
* pcap-compatible 802.11 packet sniffer
*
* Copyright (C) 2006-2013 Thomas d'Otreppe
* Copyright (C) 2004, 2005 Christophe Devine
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. * If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. * If you
* do not wish to do so, delete this exception statement from your
* version. * If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <sys/time.h>
#ifndef TIOCGWINSZ
#include <sys/termios.h>
#endif
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <time.h>
#include <getopt.h>
#include <fcntl.h>
#include <pthread.h>
#include <termios.h>
#include <sys/wait.h>
#ifdef HAVE_PCRE
#include <pcre.h>
#endif
#include "version.h"
#include "pcap.h"
#include "uniqueiv.h"
#include "crypto.h"
#include "osdep/osdep.h"
#include "airodump-ng.h"
#include "osdep/common.h"
#include "common.h"
#ifdef USE_GCRYPT
GCRY_THREAD_OPTION_PTHREAD_IMPL;
#endif
void dump_sort( void );
void dump_print( int ws_row, int ws_col, int if_num );
char * get_manufacturer_from_string(char * buffer) {
char * manuf = NULL;
char * buffer_manuf;
if (buffer != NULL && strlen(buffer) > 0) {
buffer_manuf = strstr(buffer, "(hex)");
if (buffer_manuf != NULL) {
buffer_manuf += 6; // skip '(hex)' and one more character (there's at least one 'space' character after that string)
while (*buffer_manuf == '\t' || *buffer_manuf == ' ') {
++buffer_manuf;
}
// Did we stop at the manufacturer
if (*buffer_manuf != '\0') {
// First make sure there's no end of line
if (buffer_manuf[strlen(buffer_manuf) - 1] == '\n' || buffer_manuf[strlen(buffer_manuf) - 1] == '\r') {
buffer_manuf[strlen(buffer_manuf) - 1] = '\0';
if (*buffer_manuf != '\0' && (buffer_manuf[strlen(buffer_manuf) - 1] == '\n' || buffer[strlen(buffer_manuf) - 1] == '\r')) {
buffer_manuf[strlen(buffer_manuf) - 1] = '\0';
}
}
if (*buffer_manuf != '\0') {
if ((manuf = (char *)malloc((strlen(buffer_manuf) + 1) * sizeof(char))) == NULL) {
perror("malloc failed");
return NULL;
}
snprintf(manuf, strlen(buffer_manuf) + 1, "%s", buffer_manuf);
}
}
}
}
return manuf;
}
void textcolor(int attr, int fg, int bg)
{ char command[13];
/* Command is the control command to the terminal */
sprintf(command, "%c[%d;%d;%dm", 0x1B, attr, fg + 30, bg + 40);
fprintf(stderr, "%s", command);
fflush(stderr);
}
void textcolor_fg(int fg)
{ char command[13];
/* Command is the control command to the terminal */
sprintf(command, "\033[%dm", fg + 30);
fprintf(stderr, "%s", command);
fflush(stderr);
}
void textcolor_bg(int bg)
{ char command[13];
/* Command is the control command to the terminal */
sprintf(command, "\033[%dm", bg + 40);
fprintf(stderr, "%s", command);
fflush(stderr);
}
void textstyle(int attr)
{ char command[13];
/* Command is the control command to the terminal */
sprintf(command, "\033[%im", attr);
fprintf(stderr, "%s", command);
fflush(stderr);
}
void reset_term() {
struct termios oldt,
newt;
tcgetattr( STDIN_FILENO, &oldt );
newt = oldt;
newt.c_lflag |= ( ICANON | ECHO );
tcsetattr( STDIN_FILENO, TCSANOW, &newt );
}
int mygetch( ) {
struct termios oldt,
newt;
int ch;
tcgetattr( STDIN_FILENO, &oldt );
newt = oldt;
newt.c_lflag &= ~( ICANON | ECHO );
tcsetattr( STDIN_FILENO, TCSANOW, &newt );
ch = getchar();
tcsetattr( STDIN_FILENO, TCSANOW, &oldt );
return ch;
}
void resetSelection()
{
G.sort_by = SORT_BY_POWER;
G.sort_inv = 1;
G.start_print_ap=1;
G.start_print_sta=1;
G.selected_ap=1;
G.selected_sta=1;
G.selection_ap=0;
G.selection_sta=0;
G.mark_cur_ap=0;
G.skip_columns=0;
G.do_pause=0;
G.do_sort_always=0;
memset(G.selected_bssid, '\x00', 6);
}
#define KEY_TAB 0x09 //switch between APs/clients for scrolling
#define KEY_SPACE 0x20 //pause/resume output
#define KEY_ARROW_UP 0x41 //scroll
#define KEY_ARROW_DOWN 0x42 //scroll
#define KEY_ARROW_RIGHT 0x43 //scroll
#define KEY_ARROW_LEFT 0x44 //scroll
#define KEY_a 0x61 //cycle through active information (ap/sta/ap+sta/ap+sta+ack)
#define KEY_c 0x63 //cycle through channels
#define KEY_d 0x64 //default mode
#define KEY_i 0x69 //inverse sorting
#define KEY_m 0x6D //mark current AP
#define KEY_n 0x6E //?
#define KEY_r 0x72 //realtime sort (de)activate
#define KEY_s 0x73 //cycle through sorting
void input_thread( void *arg) {
if(!arg){}
while( G.do_exit == 0 ) {
int keycode=0;
keycode=mygetch();
if(keycode == KEY_s) {
G.sort_by++;
G.selection_ap = 0;
G.selection_sta = 0;
if(G.sort_by > MAX_SORT)
G.sort_by = 0;
switch(G.sort_by) {
case SORT_BY_NOTHING:
snprintf(G.message, sizeof(G.message), "][ sorting by first seen");
break;
case SORT_BY_BSSID:
snprintf(G.message, sizeof(G.message), "][ sorting by bssid");
break;
case SORT_BY_POWER:
snprintf(G.message, sizeof(G.message), "][ sorting by power level");
break;
case SORT_BY_BEACON:
snprintf(G.message, sizeof(G.message), "][ sorting by beacon number");
break;
case SORT_BY_DATA:
snprintf(G.message, sizeof(G.message), "][ sorting by number of data packets");
break;
case SORT_BY_PRATE:
snprintf(G.message, sizeof(G.message), "][ sorting by packet rate");
break;
case SORT_BY_CHAN:
snprintf(G.message, sizeof(G.message), "][ sorting by channel");
break;
case SORT_BY_MBIT:
snprintf(G.message, sizeof(G.message), "][ sorting by max data rate");
break;
case SORT_BY_ENC:
snprintf(G.message, sizeof(G.message), "][ sorting by encryption");
break;
case SORT_BY_CIPHER:
snprintf(G.message, sizeof(G.message), "][ sorting by cipher");
break;
case SORT_BY_AUTH:
snprintf(G.message, sizeof(G.message), "][ sorting by authentication");
break;
case SORT_BY_ESSID:
snprintf(G.message, sizeof(G.message), "][ sorting by ESSID");
break;
default:
break;
}
pthread_mutex_lock( &(G.mx_sort) );
dump_sort();
pthread_mutex_unlock( &(G.mx_sort) );
}
if(keycode == KEY_SPACE) {
G.do_pause = (G.do_pause+1)%2;
if(G.do_pause) {
snprintf(G.message, sizeof(G.message), "][ paused output");
pthread_mutex_lock( &(G.mx_print) );
fprintf( stderr, "\33[1;1H" );
dump_print( G.ws.ws_row, G.ws.ws_col, G.num_cards );
fprintf( stderr, "\33[J" );
fflush(stderr);
pthread_mutex_unlock( &(G.mx_print) );
}
else
snprintf(G.message, sizeof(G.message), "][ resumed output");
}
if(keycode == KEY_r) {
G.do_sort_always = (G.do_sort_always+1)%2;
if(G.do_sort_always)
snprintf(G.message, sizeof(G.message), "][ realtime sorting activated");
else
snprintf(G.message, sizeof(G.message), "][ realtime sorting deactivated");
}
if(keycode == KEY_m) {
G.mark_cur_ap = 1;
}
if(keycode == KEY_ARROW_DOWN) {
if(G.selection_ap == 1) {
G.selected_ap++;
}
if(G.selection_sta == 1) {
G.selected_sta++;
}
}
if(keycode == KEY_ARROW_UP) {
if(G.selection_ap == 1) {
G.selected_ap--;
if(G.selected_ap < 1)
G.selected_ap = 1;
}
if(G.selection_sta == 1) {
G.selected_sta--;
if(G.selected_sta < 1)
G.selected_sta = 1;
}
}
if(keycode == KEY_i) {
G.sort_inv*=-1;
if(G.sort_inv < 0)
snprintf(G.message, sizeof(G.message), "][ inverted sorting order");
else
snprintf(G.message, sizeof(G.message), "][ normal sorting order");
}
if(keycode == KEY_TAB) {
if(G.selection_ap == 0) {
G.selection_ap = 1;
G.selected_ap = 1;
snprintf(G.message, sizeof(G.message), "][ enabled AP selection");
G.sort_by = SORT_BY_NOTHING;
} else if(G.selection_ap == 1) {
G.selection_ap = 0;
G.sort_by = SORT_BY_NOTHING;
snprintf(G.message, sizeof(G.message), "][ disabled selection");
}
}
if(keycode == KEY_a) {
if(G.show_ap == 1 && G.show_sta == 1 && G.show_ack == 0) {
G.show_ap = 1;
G.show_sta = 1;
G.show_ack = 1;
snprintf(G.message, sizeof(G.message), "][ display ap+sta+ack");
} else if(G.show_ap == 1 && G.show_sta == 1 && G.show_ack == 1) {
G.show_ap = 1;
G.show_sta = 0;
G.show_ack = 0;
snprintf(G.message, sizeof(G.message), "][ display ap only");
} else if(G.show_ap == 1 && G.show_sta == 0 && G.show_ack == 0) {
G.show_ap = 0;
G.show_sta = 1;
G.show_ack = 0;
snprintf(G.message, sizeof(G.message), "][ display sta only");
} else if(G.show_ap == 0 && G.show_sta == 1 && G.show_ack == 0) {
G.show_ap = 1;
G.show_sta = 1;
G.show_ack = 0;
snprintf(G.message, sizeof(G.message), "][ display ap+sta");
}
}
if (keycode == KEY_d) {
resetSelection();
snprintf(G.message, sizeof(G.message), "][ reset selection to default");
}
if(G.do_exit == 0 && !G.do_pause) {
pthread_mutex_lock( &(G.mx_print) );
fprintf( stderr, "\33[1;1H" );
dump_print( G.ws.ws_row, G.ws.ws_col, G.num_cards );
fprintf( stderr, "\33[J" );
fflush(stderr);
pthread_mutex_unlock( &(G.mx_print) );
}
}
}
void trim(char *str)
{
int i;
int begin = 0;
int end = strlen(str) - 1;
while (isspace((int)str[begin])) begin++;
while ((end >= begin) && isspace((int)str[end])) end--;
// Shift all characters back to the start of the string array.
for (i = begin; i <= end; i++)
str[i - begin] = str[i];
str[i - begin] = '\0'; // Null terminate string.
}
struct oui * load_oui_file(void) {
FILE *fp;
char * manuf;
char buffer[BUFSIZ];
unsigned char a[2];
unsigned char b[2];
unsigned char c[2];
struct oui *oui_ptr = NULL, *oui_head = NULL;
if (!(fp = fopen(OUI_PATH0, "r"))) {
if (!(fp = fopen(OUI_PATH1, "r"))) {
if (!(fp = fopen(OUI_PATH2, "r"))) {
if (!(fp = fopen(OUI_PATH3, "r"))) {
return NULL;
}
}
}
}
memset(buffer, 0x00, sizeof(buffer));
while (fgets(buffer, sizeof(buffer), fp) != NULL) {
if (!(strstr(buffer, "(hex)")))
continue;
memset(a, 0x00, sizeof(a));
memset(b, 0x00, sizeof(b));
memset(c, 0x00, sizeof(c));
// Remove leading/trailing whitespaces.
trim(buffer);
if (sscanf(buffer, "%2c-%2c-%2c", a, b, c) == 3) {
if (oui_ptr == NULL) {
if (!(oui_ptr = (struct oui *)malloc(sizeof(struct oui)))) {
fclose(fp);
perror("malloc failed");
return NULL;
}
} else {
if (!(oui_ptr->next = (struct oui *)malloc(sizeof(struct oui)))) {
fclose(fp);
perror("malloc failed");
return NULL;
}
oui_ptr = oui_ptr->next;
}
memset(oui_ptr->id, 0x00, sizeof(oui_ptr->id));
memset(oui_ptr->manuf, 0x00, sizeof(oui_ptr->manuf));
snprintf(oui_ptr->id, sizeof(oui_ptr->id), "%c%c:%c%c:%c%c", a[0], a[1], b[0], b[1], c[0], c[1]);
manuf = get_manufacturer_from_string(buffer);
if (manuf != NULL) {
snprintf(oui_ptr->manuf, sizeof(oui_ptr->manuf), "%s", manuf);
free(manuf);
} else {
snprintf(oui_ptr->manuf, sizeof(oui_ptr->manuf), "Unknown");
}
if (oui_head == NULL)
oui_head = oui_ptr;
oui_ptr->next = NULL;
}
}
fclose(fp);
return oui_head;
}
int check_shared_key(unsigned char *h80211, int caplen)
{
int m_bmac, m_smac, m_dmac, n, textlen;
char ofn[1024];
char text[4096];
char prga[4096];
unsigned int long crc;
if((unsigned)caplen > sizeof(G.sharedkey[0])) return 1;
m_bmac = 16;
m_smac = 10;
m_dmac = 4;
if( time(NULL) - G.sk_start > 5)
{
/* timeout(5sec) - remove all packets, restart timer */
memset(G.sharedkey, '\x00', 4096*3);
G.sk_start = time(NULL);
}
/* is auth packet */
if( (h80211[1] & 0x40) != 0x40 )
{
/* not encrypted */
if( ( h80211[24] + (h80211[25] << 8) ) == 1 )
{
/* Shared-Key Authentication */
if( ( h80211[26] + (h80211[27] << 8) ) == 2 )
{
/* sequence == 2 */
memcpy(G.sharedkey[0], h80211, caplen);
G.sk_len = caplen-24;
}
if( ( h80211[26] + (h80211[27] << 8) ) == 4 )
{
/* sequence == 4 */
memcpy(G.sharedkey[2], h80211, caplen);
}
}
else return 1;
}
else
{
/* encrypted */
memcpy(G.sharedkey[1], h80211, caplen);
G.sk_len2 = caplen-24-4;
}
/* check if the 3 packets form a proper authentication */
if( ( memcmp(G.sharedkey[0]+m_bmac, NULL_MAC, 6) == 0 ) ||
( memcmp(G.sharedkey[1]+m_bmac, NULL_MAC, 6) == 0 ) ||
( memcmp(G.sharedkey[2]+m_bmac, NULL_MAC, 6) == 0 ) ) /* some bssids == zero */
{
return 1;
}
if( ( memcmp(G.sharedkey[0]+m_bmac, G.sharedkey[1]+m_bmac, 6) != 0 ) ||
( memcmp(G.sharedkey[0]+m_bmac, G.sharedkey[2]+m_bmac, 6) != 0 ) ) /* all bssids aren't equal */
{
return 1;
}
if( ( memcmp(G.sharedkey[0]+m_smac, G.sharedkey[2]+m_smac, 6) != 0 ) ||
( memcmp(G.sharedkey[0]+m_smac, G.sharedkey[1]+m_dmac, 6) != 0 ) ) /* SA in 2&4 != DA in 3 */
{
return 1;
}
if( (memcmp(G.sharedkey[0]+m_dmac, G.sharedkey[2]+m_dmac, 6) != 0 ) ||
(memcmp(G.sharedkey[0]+m_dmac, G.sharedkey[1]+m_smac, 6) != 0 ) ) /* DA in 2&4 != SA in 3 */
{
return 1;
}
textlen = G.sk_len;
if(textlen+4 != G.sk_len2)
{
snprintf(G.message, sizeof(G.message), "][ Broken SKA: %02X:%02X:%02X:%02X:%02X:%02X ",
*(G.sharedkey[0]+m_bmac), *(G.sharedkey[0]+m_bmac+1), *(G.sharedkey[0]+m_bmac+2),
*(G.sharedkey[0]+m_bmac+3), *(G.sharedkey[0]+m_bmac+4), *(G.sharedkey[0]+m_bmac+5));
return 1;
}
if((unsigned)textlen > sizeof(text) - 4) return 1;
memcpy(text, G.sharedkey[0]+24, textlen);
/* increment sequence number from 2 to 3 */
text[2] = text[2]+1;
crc = 0xFFFFFFFF;
for( n = 0; n < textlen; n++ )
crc = crc_tbl[(crc ^ text[n]) & 0xFF] ^ (crc >> 8);
crc = ~crc;
/* append crc32 over body */
text[textlen] = (crc ) & 0xFF;
text[textlen+1] = (crc >> 8) & 0xFF;
text[textlen+2] = (crc >> 16) & 0xFF;
text[textlen+3] = (crc >> 24) & 0xFF;
/* cleartext XOR cipher */
for(n=0; n<(textlen+4); n++)
{
prga[4+n] = (text[n] ^ G.sharedkey[1][28+n]) & 0xFF;
}
/* write IV+index */
prga[0] = G.sharedkey[1][24] & 0xFF;
prga[1] = G.sharedkey[1][25] & 0xFF;
prga[2] = G.sharedkey[1][26] & 0xFF;
prga[3] = G.sharedkey[1][27] & 0xFF;
if( G.f_xor != NULL )
{
fclose(G.f_xor);
G.f_xor = NULL;
}
snprintf( ofn, sizeof( ofn ) - 1, "%s-%02d-%02X-%02X-%02X-%02X-%02X-%02X.%s", G.prefix, G.f_index,
*(G.sharedkey[0]+m_bmac), *(G.sharedkey[0]+m_bmac+1), *(G.sharedkey[0]+m_bmac+2),
*(G.sharedkey[0]+m_bmac+3), *(G.sharedkey[0]+m_bmac+4), *(G.sharedkey[0]+m_bmac+5), "xor" );
G.f_xor = fopen( ofn, "w");
if(G.f_xor == NULL)
return 1;
for(n=0; n<textlen+8; n++)
fputc((prga[n] & 0xFF), G.f_xor);
fflush(G.f_xor);
if( G.f_xor != NULL )
{
fclose(G.f_xor);
G.f_xor = NULL;
}
snprintf(G.message, sizeof(G.message), "][ %d bytes keystream: %02X:%02X:%02X:%02X:%02X:%02X ",
textlen+4, *(G.sharedkey[0]+m_bmac), *(G.sharedkey[0]+m_bmac+1), *(G.sharedkey[0]+m_bmac+2),
*(G.sharedkey[0]+m_bmac+3), *(G.sharedkey[0]+m_bmac+4), *(G.sharedkey[0]+m_bmac+5));
memset(G.sharedkey, '\x00', 512*3);
/* ok, keystream saved */
return 0;
}
char usage[] =
"\n"
" %s - (C) 2006-2013 Thomas d\'Otreppe\n"
" http://www.aircrack-ng.org\n"
"\n"
" usage: airodump-ng <options> <interface>[,<interface>,...]\n"
"\n"
" Options:\n"
" --ivs : Save only captured IVs\n"
" --gpsd : Use GPSd\n"
" --write <prefix> : Dump file prefix\n"
" -w : same as --write \n"
" --beacons : Record all beacons in dump file\n"
" --update <secs> : Display update delay in seconds\n"
" --showack : Prints ack/cts/rts statistics\n"
" -h : Hides known stations for --showack\n"
" -f <msecs> : Time in ms between hopping channels\n"
" --berlin <secs> : Time before removing the AP/client\n"
" from the screen when no more packets\n"
" are received (Default: 120 seconds)\n"
" -r <file> : Read packets from that file\n"
" -x <msecs> : Active Scanning Simulation\n"
" --manufacturer : Display manufacturer from IEEE OUI list\n"
" --uptime : Display AP Uptime from Beacon Timestamp\n"
" --output-format\n"
" <formats> : Output format. Possible values:\n"
" pcap, ivs, csv, gps, kismet, netxml\n"
" --ignore-negative-one : Removes the message that says\n"
" fixed channel <interface>: -1\n"
"\n"
" Filter options:\n"
" --encrypt <suite> : Filter APs by cipher suite\n"
" --netmask <netmask> : Filter APs by mask\n"
" --bssid <bssid> : Filter APs by BSSID\n"
" --essid <essid> : Filter APs by ESSID\n"
#ifdef HAVE_PCRE
" --essid-regex <regex> : Filter APs by ESSID using a regular\n"
" expression\n"
#endif
" -a : Filter unassociated clients\n"
"\n"
" By default, airodump-ng hop on 2.4GHz channels.\n"
" You can make it capture on other/specific channel(s) by using:\n"
" --channel <channels> : Capture on specific channels\n"
" --band <abg> : Band on which airodump-ng should hop\n"
" -C <frequencies> : Uses these frequencies in MHz to hop\n"
" --cswitch <method> : Set channel switching method\n"
" 0 : FIFO (default)\n"
" 1 : Round Robin\n"
" 2 : Hop on last\n"
" -s : same as --cswitch\n"
"\n"
" --help : Displays this usage screen\n"
"\n";
int is_filtered_netmask(unsigned char *bssid)
{
unsigned char mac1[6];
unsigned char mac2[6];
int i;
for(i=0; i<6; i++)
{
mac1[i] = bssid[i] & G.f_netmask[i];
mac2[i] = G.f_bssid[i] & G.f_netmask[i];
}
if( memcmp(mac1, mac2, 6) != 0 )
{
return( 1 );
}
return 0;
}
int is_filtered_essid(unsigned char *essid)
{
int ret = 0;
int i;
if(G.f_essid)
{
for(i=0; i<G.f_essid_count; i++)
{
if(strncmp((char*)essid, G.f_essid[i], MAX_IE_ELEMENT_SIZE) == 0)
{
return 0;
}
}
ret = 1;
}
#ifdef HAVE_PCRE
if(G.f_essid_regex)
{
return pcre_exec(G.f_essid_regex, NULL, (char*)essid, strnlen((char *)essid, MAX_IE_ELEMENT_SIZE), 0, 0, NULL, 0) < 0;
}
#endif
return ret;
}
void update_rx_quality( )
{
unsigned int time_diff, capt_time, miss_time;
int missed_frames;
struct AP_info *ap_cur = NULL;
struct ST_info *st_cur = NULL;
struct timeval cur_time;
ap_cur = G.ap_1st;
st_cur = G.st_1st;
gettimeofday( &cur_time, NULL );
/* accesspoints */
while( ap_cur != NULL )
{
time_diff = 1000000 * (cur_time.tv_sec - ap_cur->ftimer.tv_sec )
+ (cur_time.tv_usec - ap_cur->ftimer.tv_usec);
/* update every `QLT_TIME`seconds if the rate is low, or every 500ms otherwise */
if( (ap_cur->fcapt >= QLT_COUNT && time_diff > 500000 ) || time_diff > (QLT_TIME * 1000000) )
{
/* at least one frame captured */
if(ap_cur->fcapt > 1)
{
capt_time = ( 1000000 * (ap_cur->ftimel.tv_sec - ap_cur->ftimef.tv_sec ) //time between first and last captured frame
+ (ap_cur->ftimel.tv_usec - ap_cur->ftimef.tv_usec) );
miss_time = ( 1000000 * (ap_cur->ftimef.tv_sec - ap_cur->ftimer.tv_sec ) //time between timer reset and first frame
+ (ap_cur->ftimef.tv_usec - ap_cur->ftimer.tv_usec) )
+ ( 1000000 * (cur_time.tv_sec - ap_cur->ftimel.tv_sec ) //time between last frame and this moment
+ (cur_time.tv_usec - ap_cur->ftimel.tv_usec) );
//number of frames missed at the time where no frames were captured; extrapolated by assuming a constant framerate
if(capt_time > 0 && miss_time > 200000)
{
missed_frames = ((float)((float)miss_time/(float)capt_time) * ((float)ap_cur->fcapt + (float)ap_cur->fmiss));
ap_cur->fmiss += missed_frames;
}
ap_cur->rx_quality = ((float)((float)ap_cur->fcapt / ((float)ap_cur->fcapt + (float)ap_cur->fmiss)) * 100.0);
}
else ap_cur->rx_quality = 0; /* no packets -> zero quality */
/* normalize, in case the seq numbers are not iterating */
if(ap_cur->rx_quality > 100) ap_cur->rx_quality = 100;
if(ap_cur->rx_quality < 0 ) ap_cur->rx_quality = 0;
/* reset variables */
ap_cur->fcapt = 0;
ap_cur->fmiss = 0;
gettimeofday( &(ap_cur->ftimer) ,NULL);
}
ap_cur = ap_cur->next;
}
/* stations */
while( st_cur != NULL )
{
time_diff = 1000000 * (cur_time.tv_sec - st_cur->ftimer.tv_sec )
+ (cur_time.tv_usec - st_cur->ftimer.tv_usec);
if( time_diff > 10000000 )
{
st_cur->missed = 0;
gettimeofday( &(st_cur->ftimer), NULL );
}
st_cur = st_cur->next;
}
}
/* setup the output files */
int dump_initialize( char *prefix, int ivs_only )
{
int i, ofn_len;
FILE *f;
char * ofn = NULL;
/* If you only want to see what happening, send all data to /dev/null */
if ( prefix == NULL || strlen( prefix ) == 0) {
return( 0 );
}
/* Create a buffer of the length of the prefix + '-' + 2 numbers + '.'
+ longest extension ("kismet.netxml") + terminating 0. */
ofn_len = strlen(prefix) + 1 + 2 + 1 + 13 + 1;
ofn = (char *)calloc(1, ofn_len);
G.f_index = 1;
/* Make sure no file with the same name & all possible file extensions. */
do
{
for( i = 0; i < NB_EXTENSIONS; i++ )
{
memset(ofn, 0, ofn_len);
snprintf( ofn, ofn_len, "%s-%02d.%s",
prefix, G.f_index, f_ext[i] );
if( ( f = fopen( ofn, "rb+" ) ) != NULL )
{
fclose( f );
G.f_index++;
break;
}
}
}
/* If we did all extensions then no file with that name or extension exist
so we can use that number */
while( i < NB_EXTENSIONS );
G.prefix = (char *) malloc(strlen(prefix) + 1);
memcpy(G.prefix, prefix, strlen(prefix) + 1);
/* create the output CSV file */
if (G.output_format_csv) {
memset(ofn, 0, ofn_len);
snprintf( ofn, ofn_len, "%s-%02d.%s",
prefix, G.f_index, AIRODUMP_NG_CSV_EXT );
if( ( G.f_txt = fopen( ofn, "wb+" ) ) == NULL )
{
perror( "fopen failed" );
fprintf( stderr, "Could not create \"%s\".\n", ofn );
free( ofn );
return( 1 );
}
}
/* create the output Kismet CSV file */
if (G.output_format_kismet_csv) {
memset(ofn, 0, ofn_len);
snprintf( ofn, ofn_len, "%s-%02d.%s",
prefix, G.f_index, KISMET_CSV_EXT );
if( ( G.f_kis = fopen( ofn, "wb+" ) ) == NULL )
{
perror( "fopen failed" );
fprintf( stderr, "Could not create \"%s\".\n", ofn );
free( ofn );
return( 1 );
}
}
/* create the output GPS file */
if (G.usegpsd)
{
memset(ofn, 0, ofn_len);
snprintf( ofn, ofn_len, "%s-%02d.%s",
prefix, G.f_index, AIRODUMP_NG_GPS_EXT );
if( ( G.f_gps = fopen( ofn, "wb+" ) ) == NULL )
{
perror( "fopen failed" );
fprintf( stderr, "Could not create \"%s\".\n", ofn );
free( ofn );
return( 1 );
}
}
/* Create the output kismet.netxml file */
if (G.output_format_kismet_netxml) {
memset(ofn, 0, ofn_len);
snprintf( ofn, ofn_len, "%s-%02d.%s",
prefix, G.f_index, KISMET_NETXML_EXT );
if( ( G.f_kis_xml = fopen( ofn, "wb+" ) ) == NULL )
{
perror( "fopen failed" );
fprintf( stderr, "Could not create \"%s\".\n", ofn );
free( ofn );
return( 1 );
}
}
/* create the output packet capture file */
if( G.output_format_pcap )
{
struct pcap_file_header pfh;
memset(ofn, 0, ofn_len);
snprintf( ofn, ofn_len, "%s-%02d.%s",
prefix, G.f_index, AIRODUMP_NG_CAP_EXT );
if( ( G.f_cap = fopen( ofn, "wb+" ) ) == NULL )
{
perror( "fopen failed" );
fprintf( stderr, "Could not create \"%s\".\n", ofn );
free( ofn );
return( 1 );
}
G.f_cap_name = (char *) malloc( strlen( ofn ) + 1 );
memcpy( G.f_cap_name, ofn, strlen( ofn ) + 1 );
free( ofn );
pfh.magic = TCPDUMP_MAGIC;
pfh.version_major = PCAP_VERSION_MAJOR;
pfh.version_minor = PCAP_VERSION_MINOR;
pfh.thiszone = 0;
pfh.sigfigs = 0;
pfh.snaplen = 65535;
pfh.linktype = LINKTYPE_IEEE802_11;
if( fwrite( &pfh, 1, sizeof( pfh ), G.f_cap ) !=
(size_t) sizeof( pfh ) )
{
perror( "fwrite(pcap file header) failed" );
return( 1 );
}
} else if ( ivs_only ) {
struct ivs2_filehdr fivs2;
fivs2.version = IVS2_VERSION;
memset(ofn, 0, ofn_len);
snprintf( ofn, ofn_len, "%s-%02d.%s",
prefix, G.f_index, IVS2_EXTENSION );
if( ( G.f_ivs = fopen( ofn, "wb+" ) ) == NULL )
{
perror( "fopen failed" );
fprintf( stderr, "Could not create \"%s\".\n", ofn );
free( ofn );
return( 1 );
}
free( ofn );
if( fwrite( IVS2_MAGIC, 1, 4, G.f_ivs ) != (size_t) 4 )
{
perror( "fwrite(IVs file MAGIC) failed" );
return( 1 );
}
if( fwrite( &fivs2, 1, sizeof(struct ivs2_filehdr), G.f_ivs ) != (size_t) sizeof(struct ivs2_filehdr) )
{
perror( "fwrite(IVs file header) failed" );
return( 1 );
}
}
return( 0 );
}
int update_dataps()
{
struct timeval tv;
struct AP_info *ap_cur;
struct NA_info *na_cur;
int sec, usec, diff, ps;
float pause;
gettimeofday(&tv, NULL);
ap_cur = G.ap_end;
while( ap_cur != NULL )
{
sec = (tv.tv_sec - ap_cur->tv.tv_sec);
usec = (tv.tv_usec - ap_cur->tv.tv_usec);
pause = (((float)(sec*1000000.0f + usec))/(1000000.0f));
if( pause > 2.0f )
{
diff = ap_cur->nb_data - ap_cur->nb_data_old;
ps = (int)(((float)diff)/pause);
ap_cur->nb_dataps = ps;
ap_cur->nb_data_old = ap_cur->nb_data;
gettimeofday(&(ap_cur->tv), NULL);
}
ap_cur = ap_cur->prev;
}
na_cur = G.na_1st;