inserted temporary channel switching via alarm()

1 files changed, 24 insertions, 3 deletions

diff --git a/noncore/net/wellenreiter/daemon/source/daemon.cc b/noncore/net/wellenreiter/daemon/source/daemon.cc
index 51c2194..d6e8f6b 100644
--- a/noncore/net/wellenreiter/daemon/source/daemon.cc
+++ b/noncore/net/wellenreiter/daemon/source/daemon.cc
@@ -1,136 +1,157 @@
 /*
  * Startup functions of wellenreiter
  *
  * $Id$
  */
 
 #include "config.hh"
 #include "daemon.hh"
 
+// temporary solution, will be removed soon
+#define MAXCHANNEL 13
+char sniffer_device[6];
+int channel=0;
+int timedout=1;
+
+static int chanswitch()
+{
+  if(channel >= MAXCHANNEL)
+    channel=1
+  card_set_channel(sniffer_device, channel, card_type);
+  timedout=0;
+}
+
 /* Main function of wellenreiterd */
 int main(int argc, char **argv)
 {
   int sock, maxfd, retval, card_type;
-  char buffer[WL_SOCKBUF], sniffer_device[6];
+  char buffer[WL_SOCKBUF];
   struct pcap_pkthdr header;
   struct sockaddr_in saddr;
   pcap_t *handletopcap;
   const unsigned char *packet;
 
   fd_set rset;
 
   fprintf(stderr, "wellenreiterd %s\n\n", VERSION);
   fprintf(stderr, "(c) 2002 by M-M-M\n\n");
 
   if(argc < 3)
     usage();
 
+  // removed soon, see above
+  SIGNAL(SIGALRM, chanswitch);
+
   /* Set sniffer device */
   memset(sniffer_device, 0, sizeof(sniffer_device));
   strncpy(sniffer_device, (char *)argv[1], sizeof(sniffer_device) - 1);
 
   /* Set card type */
   card_type = atoi(argv[2]);
   if(card_type < 1 || card_type > 3)
     usage();
 
   if(!card_into_monitormode(&handletopcap, sniffer_device, card_type))
   {
     wl_logerr("Cannot initialize the wireless-card, aborting");
     exit(-1);
   }
   wl_loginfo("Set card into monitor mode");
 
   /////// following line will be moved to lib as soon as possible ////////////
     if((handletopcap = pcap_open_live(sniffer_device, BUFSIZ, 1, 0, NULL)) == NULL)
     {
       wl_logerr("pcap_open_live() failed: %s", strerror(errno));
       exit(-1);
     }
 
 #ifdef HAVE_PCAP_NONBLOCK
     pcap_setnonblock(handletopcap, 1, NULL);
 #endif
       
     ////////////////////////////////////////
  
   /* Setup socket for incoming commands */
   if((sock=wl_setupsock(DAEMONADDR, DAEMONPORT, saddr)) < 0)
   {
     wl_logerr("Cannot setup socket");
     exit(-1);
   } 
   wl_loginfo("Set up socket '%d' for GUI communication", sock);
 
   FD_ZERO(&rset);
 
   /* Start main loop */
   wl_loginfo("Starting main loop");
   while(1)
   {
 
     FD_SET(sock, &rset);
     FD_SET(pcap_fileno(handletopcap), &rset);
 
+    // blah
+    timedout=1;
+    alarm(1);
+
     /* socket or pcap handle bigger? Will be cleaned up, have to check pcap */
     maxfd = (sock > pcap_fileno(handletopcap) ? sock : pcap_fileno(handletopcap)) + 1;
 
-    if(select(maxfd, &rset, NULL, NULL, NULL) < 0)
+    if(select(maxfd, &rset, NULL, NULL, NULL) < 0 && timedout)
     {
       wl_logerr("Error calling select: %s", strerror(errno));
       break;
     }     
 
     /* Got data on local socket from GUI */
     if(FD_ISSET(sock, &rset))
     {
       /* Receive data from socket */
-      if((retval=wl_recv(&sock, saddr, buffer, sizeof(buffer))) < 0)
+      if((retval=wl_recv(&sock, saddr, buffer, sizeof(buffer))) < 0 && timedout)
       {
         wl_logerr("Error trying to read: %s", strerror(errno));
         break;
       }
       else
       {
         /* check type of packet and start function according to it */
         switch(retval)
         {
           case 98:
            wl_loginfo("Received STARTSNIFF command");
            break;
           case 99:
               wl_loginfo("Received STOPSNIFF command");
               break;
           default:
               wl_logerr("Received unknown command: %d", retval);
               break;
         }
       }
     } /* FD_ISSET */
 
     /* Check pcap lib for packets */
     if(FD_ISSET(pcap_fileno(handletopcap), &rset))
     {
 
       /* Grab one single packet */
       packet = pcap_next(handletopcap, &header);
 
       /* process the packet */
       process_packets(&header,*&packet, GUIADDR, GUIPORT);
     }
 
   } /* while(1) */
   
   close(sock);
   exit(0);
 }
 
 void usage(void)
 {
   fprintf(stderr, "Usage: wellenreiter <device> <cardtype>\n"      \
           "\t<device>   = Wirelessdevice (e.g. wlan0)\n" \
           "\t<cardtype> = Cardtype:\t Cisco\t= 1\n"       \
           "\t\t\t\tNG\t= 2\n"                             \
           "\t\t\t\tHOSTAP\t= 3\n");
   exit(-1);
 }