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/*
* Startup functions of wellenreiter
*
* $Id$
*/
#include "config.hh"
#include "daemon.hh"
/* Main function of wellenreiterd */
int main(int argc, char **argv)
{
int sock, maxfd, retval, card_type;
char buffer[WL_SOCKBUF], sniffer_device[6];
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();
/* 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 set card into mon mode, 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
/* getting the datalink type */
retval = pcap_datalink(handletopcap);
if (retval != DLT_IEEE802_11) /* Rawmode is IEEE802_11 */
{
wl_logerr("Interface %s does not work in the correct 802.11 raw mode",
sniffer_device);
pcap_close(handletopcap);
exit(-1);;
}
wl_loginfo("Your successfully listen on %s in 802.11 raw mode", sniffer_device);
////////////////////////////////////////
/* 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);
/* 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)
{
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)
{
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);
}
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