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/*
* $Id: main.c,v 1.3 1998/08/15 00:00:50 elkner Exp $
*
* Author: Squirm derived http://www.senet.com.au/squirm/
* Project: Jesred http://ivs.cs.uni-magdeburg.de/~elkner/webtools/jesred/
*
* 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.
*
* http://www.gnu.org/copyleft/gpl.html or ./gpl.html
* 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>
#include<sys/signal.h>
#include<sys/types.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#ifdef LINUX
#include <unistd.h>
#endif
#ifdef LOCAL_REGEX
#include "regex.h"
#else
#include<regex.h>
#endif
#include "main.h"
#include "ip_list.h"
#include "pattern_list.h"
#include "config.h"
#include "util.h"
#include "log.h"
#include "version.h"
#include "rewrite.h"
extern int pattern_compare(); /* from rewrite.c */
static void Usage (void);
static void GetOptions(int argc, char *argv[]);
int echo_mode = 0;
int sig_hup = 0;
int interactive = 0;
int allow_siblings = 0;
#ifdef DEBUG
int debug_mode = 0;
#endif
FILE *fd_redirect = NULL;
FILE *fd_rewrite = NULL;
int main(int argc, char **argv)
{
char *f_allow = NULL;
char *f_rules = NULL;
char *f_rewrite = NULL;
char *f_redirect = NULL;
/* int first_run = 1; */
char buff[BUFSIZE];
char redirect_url[BUFSIZE];
char *url, *src_addr, *ident, *method, *urlgroup;
int finished = 0;
int buff_status = 0;
ip_acl *ip_list = NULL;
pattern_item *pattern_list = NULL;
/* go into interactive mode if we're run as root */
if((int)getuid() == 0) {
interactive = 1;
fprintf(stderr, "%s running as UID 0: writing logs to stderr\n",APPNAME);
}
signal(SIGHUP, HUPhandler);
signal(SIGKILL, KILLhandler);
GetOptions(argc, argv);
/* main program loop, executed forever more unless terminated
by a kill signal or EOF on stdin */
while(! finished) {
int val;
sig_hup = 0;
mylog(INFO, "Freeing up old linked lists\n");
ip_acl_destroy(&ip_list);
plist_destroy(&pattern_list);
closeLogs();
read_config(&f_allow, &f_rules, &f_redirect, &f_rewrite);
if (! interactive)
openLogs(&f_redirect, &f_rewrite);
read_allow(&f_allow, &ip_list);
read_rules(&f_rules, &pattern_list);
if(echo_mode)
mylog(ERROR, "Invalid condition - continuing in ECHO mode\n");
mylog(INFO, "%s (PID %d) started\n", APPNAME, (int)getpid());
while((!sig_hup) && (fgets(buff, BUFSIZE, stdin) != NULL)){
if(echo_mode) {
puts("");
fflush(stdout);
continue;
}
/* separate the four fields from the single input line of stdin */
buff_status = parse_buff(buff, &url, &src_addr, &ident, &method,
&urlgroup, ip_list, pattern_list);
/* error during parsing the passed line from squid - no rewrite */
if(buff_status) {
puts("");
fflush(stdout);
continue;
}
/* check echo_mode again (sighup)*/
if(echo_mode) {
puts("");
fflush(stdout);
mylog(ERROR, "Invalid condition - continuing in ECHO mode\n");
continue;
}
/* find a rule for rewriting the URL */
val = pattern_compare(url, urlgroup, redirect_url, pattern_list);
if( val < 1 ) {
/* no rule found = 0, or ABORT rule -N */
puts("");
fflush(stdout);
continue;
}
else {
/* redirect_url contains the replacement URL */
if ( redirect_url[0] == '\0' ) {
/* regex[i] abort, i.e. empty replacement URL */
puts("");
fflush(stdout);
}
else {
printf("%s %s %s %s\n",
redirect_url, src_addr, ident, method);
fflush(stdout);
mylog(MATCH, "%s %s %s %d\n", src_addr, url, redirect_url,
val);
}
}
}
if(! sig_hup)
finished = 1;
} /* end while(1) */
ip_acl_destroy(&ip_list);
plist_destroy(&pattern_list);
closeLogs();
safe_free(f_rewrite);
safe_free(f_redirect);
return 0;
}
static void
GetOptions(int argc, char *argv[])
{
extern char *optarg;
extern int optind;
int c;
while ((c = getopt(argc, argv, "hv")) != -1) {
switch (c) {
case 'h' :
Usage();
break;
case 'v' :
printf("%s %s (C) by %s (%s)\n%s\n",
APPNAME, VERSION, AUTHOR, AUTHOR_EMAIL, APPURL);
exit(0);
default:
Usage();
break;
}
}
}
static void
Usage(void)
{
fprintf(stderr,
"Usage: %s [-h] [-v]\n\n"
" -h print this and exit\n"
" -v show version and exit\n",
APPNAME);
exit(1);
}
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