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/* Copyright (C) 1998, 2001, 2002, 2004, 2005, 2007, 2008
Free Software Foundation, Inc.
This file is part of GNU Inetutils.
GNU Inetutils 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 3, or (at your option)
any later version.
GNU Inetutils is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR 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 GNU Inetutils; see the file COPYING. If not, write
to the Free Software Foundation, Inc., 51 Franklin Street,
Fifth Floor, Boston, MA 02110-1301 USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <xalloc.h>
#include "ping_common.h"
extern unsigned char *data_buffer;
extern size_t data_length;
static void _ping_freebuf (PING * p);
size_t
ping_cvt_number (const char *optarg, size_t maxval, int allow_zero)
{
char *p;
unsigned long int n;
n = strtoul (optarg, &p, 0);
if (*p)
error (EXIT_FAILURE, 0, "invalid value (`%s' near `%s')", optarg, p);
if (n == 0 && !allow_zero)
error (EXIT_FAILURE, 0, "option value too small: %s", optarg);
if (maxval && n > maxval)
error (EXIT_FAILURE, 0, "option value too big: %s", optarg);
return n;
}
void
init_data_buffer (u_char * pat, int len)
{
int i = 0;
u_char *p;
if (data_length == 0)
return;
data_buffer = (u_char *) xmalloc (data_length);
if (pat)
{
for (p = data_buffer; p < data_buffer + data_length; p++)
{
*p = pat[i];
if (i++ >= len)
i = 0;
}
}
else
{
for (i = 0; i < data_length; i++)
data_buffer[i] = i;
}
}
void
decode_pattern (const char *text, int *pattern_len,
unsigned char *pattern_data)
{
int i, c, off;
for (i = 0; *text && i < *pattern_len; i++)
{
if (sscanf (text, "%2x%n", &c, &off) != 1)
error (EXIT_FAILURE, 0, "error in pattern near %s", text);
text += off;
}
*pattern_len = i;
}
/*
* tvsub --
* Subtract 2 timeval structs: out = out - in. Out is assumed to
* be >= in.
*/
void
tvsub (struct timeval *out, struct timeval *in)
{
if ((out->tv_usec -= in->tv_usec) < 0)
{
--out->tv_sec;
out->tv_usec += 1000000;
}
out->tv_sec -= in->tv_sec;
}
double
nabs (double a)
{
return (a < 0) ? -a : a;
}
double
nsqrt (double a, double prec)
{
double x0, x1;
if (a < 0)
return 0;
if (a < prec)
return 0;
x1 = a / 2;
do
{
x0 = x1;
x1 = (x0 + a / x0) / 2;
}
while (nabs (x1 - x0) > prec);
return x1;
}
int
_ping_setbuf (PING * p, bool use_ipv6)
{
if (!p->ping_buffer) {
p->ping_buffer = malloc (_PING_BUFLEN (p, use_ipv6));
if (!p->ping_buffer)
return -1;
}
if (!p->ping_cktab) {
p->ping_cktab = malloc (p->ping_cktab_size);
if (!p->ping_cktab)
return -1;
memset (p->ping_cktab, 0, p->ping_cktab_size);
}
return 0;
}
int
ping_set_data (PING * p, void *data, size_t off, size_t len, bool use_ipv6)
{
icmphdr_t *icmp;
if (_ping_setbuf (p, use_ipv6))
return -1;
if (p->ping_datalen < off + len)
return -1;
icmp = (icmphdr_t *) p->ping_buffer;
memcpy (icmp->icmp_data + off, data, len);
return 0;
}
void
ping_set_count (PING * ping, size_t count)
{
ping->ping_count = count;
}
void
ping_set_sockopt (PING * ping, int opt, void *val, int valsize)
{
setsockopt (ping->ping_fd, SOL_SOCKET, opt, (char *) &val, valsize);
}
void
ping_set_interval (PING * ping, size_t interval)
{
ping->ping_interval = interval;
}
void
_ping_freebuf (PING * p)
{
if (p->ping_buffer)
{
free (p->ping_buffer);
p->ping_buffer = NULL;
}
if (p->ping_cktab)
{
free (p->ping_cktab);
p->ping_cktab = NULL;
}
}
void
ping_unset_data (PING * p)
{
_ping_freebuf (p);
}
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