openwrt/package/wiviz/src/channelhopper.c

   1 /*
   2 This file is part of Wi-viz (http://wiviz.natetrue.com).
   3
   4 Wi-viz is free software; you can redistribute it and/or modify
   5 it under the terms of the GNU General Public License v2 as published by
   6 the Free Software Foundation.
   7
   8 Wi-viz is distributed in the hope that it will be useful,
   9 but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 GNU General Public License for more details.
  12
  13 You should have received a copy of the GNU General Public License
  14 along with Wi-viz; if not, write to the Free Software
  15 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  16 */
  17 #include <stdio.h>
  18 #include <pcap.h>
  19 #include <signal.h>
  20 #include <sys/time.h>
  21 #include "wl_access.h"
  22 #include "channelhopper.h"
  23 #include "structs.h"
  24
  25 void ch_sig_handler(int i) {
  26
  27   }
  28
  29 void channelHopper(wiviz_cfg * cfg) {
  30   int hopPos;
  31   int nc;
  32
  33   //Turn off signal handling from parent process
  34   signal(SIGUSR1, &ch_sig_handler);
  35   signal(SIGUSR2, &ch_sig_handler);
  36
  37   //Start hoppin'!
  38   hopPos = 0;
  39   while (1) {
  40     nc = cfg->channelHopSeq[hopPos];
  41     hopPos = (hopPos + 1) % cfg->channelHopSeqLen;
  42     //Set the channel
  43     fprintf(stderr, "It sets the channel to %i\n", nc);
  44     wl_ioctl(WL_DEVICE, WLC_SET_CHANNEL, &nc, 4);
  45     //Sleep
  46     usleep(cfg->channelDwellTime * 1000);
  47     }
  48   }