/*
 *  read a essid config file and generate an interface config file
 */

/*
 * 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
 * 
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main (int argc, char **argv)
{
	char dline[64], func[12], value[64];
	FILE *incfg,*outfile;
	char essid[64],pathname[255];
	char wepkey[255], keyname[32];
	char ipmethod[10];
	int default_key=0,security=0;
	sprintf(essid,argv[1]);
	sprintf(pathname,"/etc/wifi/%s.cfg",essid);
	sprintf(keyname,"key_none");
	incfg=fopen(pathname, "r");
	
	if (! incfg) fprintf(stderr, "problem opening config file\n");
	else {
	    outfile=fopen("/tmp/interfaces.tmp", "w");
	    if (! outfile) fprintf(stderr, "problem opening config file\n");
	    else{
		fprintf(outfile,"# /etc/network/interfaces - automatically generated by net-interfaces\n\n");
		fprintf(outfile,"# Loopback Interface\nauto lo\niface lo inet loopback\n\n");
		
		while(fgets(dline,sizeof(dline),incfg)) {
			if (sscanf(dline,"%s = %s", func, value) == 2) {
				printf("func: %s value:%s\n",func,value);
				if (strcmp(func, "ipmethod")==0) {
				    if(strcmp(value,"DHCP")==0)
					sprintf(ipmethod,"%s","dhcp");
				    else
					sprintf(ipmethod,"%s","static");
				}
				if (strcmp(func, "security")==0) {
				    if(strcmp(value,"NONE")==0)
					security=0;
				    else if(strcmp(value,"WEP")==0)
					security=1;
				    else if(strcmp(value,"WPA-PSK")==0)
					security=2;
				    else if(strcmp(value,"WPA-EAP")==0)
					security=3;
				}
				if (strcmp(func, "default_key")==0) {
				    default_key=atoi(value);
				    sprintf(keyname,"key_%d",default_key);
				    printf("setting keyname: %s\n",keyname);
				}
				if (strcmp(func, keyname)==0) {
				    printf("got value: %s\n",value);
				    sprintf(wepkey,"%s",value);
				}
			}
		}
		fprintf(outfile,"# Wireless Interface\nauto eth0\niface eth0 inet %s\n",ipmethod);
		fprintf(outfile,"\twireless-essid %s\n",essid);
		if(security==0)
		    fprintf(outfile,"\twireless-enc off\n");
		else if (security==1)
		    fprintf(outfile,"\twireless-key %s [%d] key [%d] key restricted\n",wepkey,(default_key+1),(default_key+1));
		
		fprintf(outfile,"\twireless-mode managed\n\n");
		fclose(outfile);
	    }
	    fclose(incfg);
	}

system("/bin/mv /tmp/interfaces.tmp /etc/network/interfaces");

return 0;

}