log.c

* A ncurses user interface. * Network statistics to view the amount of packets and data in many

/*

  This file is part of sniffer, a packet capture utility and
  network moniter
  The author can be contacted at <[e-mail]>
  the lastest version is avilable from 
  http://stev.org

  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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <pthread.h>
#include <curses.h>
#include <fcntl.h>

#include <sys/stat.h>

#include "config.h"
#include "locks.h"
#include "gui_main.h"
#include "log.h"

#ifdef FTP
#include "ftp.h"
#endif

#ifdef HTTP
#include "http.h"
#endif

#ifdef POP3
#include "pop3.h"
#endif

/* global file descriptors */
int log_fd;

pthread_mutex_t log_mutex =  PTHREAD_MUTEX_INITIALIZER;

/**********************************************
********* Log Error ***************************
**********************************************/
/* we log any errors to the log file */
void log_error(const char *fmt, ...) {
	char buff[1024];
	int len;
	va_list ap;
	va_start(ap, fmt);
	len = vsprintf( &buff[0], fmt, ap);
	SLOCK(&log_mutex);
	write(log_fd, buff, len);
	SUNLOCK(&log_mutex);
	va_end(ap);
	return;
}

void log_error_nolock(const char *fmt, ...) {
	char buff[1024];
	int len;
	va_list ap;
	va_start(ap, fmt);
	len = vsprintf( &buff[0], fmt, ap);
	write(log_fd, buff, len);
	va_end(ap);
	return;
}

/* below here are all init functions */

/**********************************************
********* Log start ***************************
**********************************************/
/* this sets up the loggin files */
void log_start( void ) {


	SLOCK(&log_mutex);

	if (mkdir("output", S_IRWXU) < 0)
		if (errno != EEXIST) /* dont dump an error if its already there */
			log_errno_nolock("mkdir: output/ ");

	if (mkdir("output/tcp", S_IRWXU) < 0)
		if (errno != EEXIST)
			log_errno_nolock("mkdir: output/tcp ");

#ifdef DEBUG
	log_fd = open("output/log",O_CREAT|O_TRUNC|O_WRONLY, S_IRUSR|S_IWUSR);
	if (log_fd < 0)
		log_errno_nolock("(output/log) open: ");
#else
	/* if we are not in debug mode we append to the file not tuncate it */
	log_fd = open("output/log", O_CREAT|O_APPEND|O_WRONLY, S_IRUSR|S_IWUSR);
	if (log_fd < 0)
		log_errno_nolock("(output/log) open: ");
#endif

	SUNLOCK(&log_mutex);

#ifdef FTP
	ftp_open();
#endif

#ifdef HTTP
	http_open();
#endif

#ifdef POP3
	pop3_open();
#endif

	return;
}