in_ntoa.c

来自「* A ncurses user interface. * Network 」· C语言 代码 · 共 58 行

/*

  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 "config.h"

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

#include "log.h"
#include "in_ntoa.h"


/* when using this do not forget to free off the ram it malloc's */
char *in_ntoa(unsigned long in) {
	char *buff;
	char *p;

	p = (char *) &in;
	buff = malloc(18);
	if (!buff) {
		log_errno("malloc");
		return NULL;
	}

	sprintf(buff, "%d.%d.%d.%d", 
		(p[0] & 255),
		(p[1] & 255),
		(p[2] & 255),
		(p[3] & 255));

	return buff;
}