utils.c

/* Copyright (c) 2007-2012 Sergey Matveychuk Yandex, LLC.  All rights
 * reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer. 2.
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution. 4. Neither the name
 * of the company nor the names of its contributors may be used to endorse or
 * promote products derived from this software without specific prior written
 * permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE. */

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <syslog.h>
#include "dhcprelya.h"

extern unsigned debug;

char *
print_xid(uint32_t ip, char *buf)
{
	union {
		uint32_t n;
		uint8_t b[4];
	} u;

	u.n = ip;
	sprintf(buf, "0x%02x%02x%02x%02x", u.b[0], u.b[1], u.b[2], u.b[3]);
	return buf;
}

/* Print a log message */
void
logd(int log_level, char *fmt,...)
{
	va_list ap;
	char buf[1024];

	va_start(ap, fmt);

	vsprintf(buf, fmt, ap);
	if (debug)
		printf("%s\n", buf);
	else if (log_level != LOG_DEBUG)
		syslog(LOG_ERR, "%s", buf);

	va_end(ap);
}

/* Rerurn 1(true) for strings "yes", "on", "1" or 0(false) for strings "no",
 * "off", "0" and -1 for an error. All strings is case insensitive. */
int
get_bool_value(const char *str)
{
	if (strcasecmp(str, "yes") == 0 || strcasecmp(str, "on") == 0 ||
	    strcmp(str, "1"))
		return 1;
	else if (strcasecmp(str, "no") == 0 || strcasecmp(str, "off") == 0 ||
		 strcmp(str, "0"))
		return 0;
	else
		return -1;
}