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/* error logging functions
* Copyright (C) 1997 Angelos D. Keromytis.
* Copyright (C) 1998-2001,2013 D. Hugh Redelmeier <hugh@mimosa.com>
* Copyright (C) 2005-2007 Michael Richardson
* Copyright (C) 2006-2010 Bart Trojanowski
* Copyright (C) 2008-2012 Paul Wouters
* Copyright (C) 2008-2010 David McCullough.
* Copyright (C) 2012 Paul Wouters <paul@libreswan.org>
* Copyright (C) 2013,2015 Paul Wouters <pwouters@redhat.com>
* Copyright (C) 2013 Tuomo Soini <tis@foobar.fi>
* Copyright (C) 2017,2021 Andrew Cagney <cagney@gnu.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. See <https://www.gnu.org/licenses/gpl2.txt>.
*
* 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.
*
*/
#include <string.h>
#include "lswlog.h"
/*
* dump raw bytes; when LABEL is non-NULL prefix the dump with a log
* line containing the label.
*/
void llog_dump(lset_t rc_flags, const struct logger *logger,
const void *p, size_t len)
{
const uint8_t *cp = p;
do {
/* each line shows 16 bytes; remember sizeof includes '\0' */
char hex[sizeof(" xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx")];
char str[sizeof("................")];
char *hp = hex;
char *sp = str;
for (int i = 0; len != 0 && i != 4; i++) {
*hp++ = ' ';
for (int j = 0; len != 0 && j != 4; len--, j++) {
static const char hexdig[] =
"0123456789abcdef";
*hp++ = ' ';
*hp++ = hexdig[(*cp >> 4) & 0xF];
*hp++ = hexdig[(*cp >> 0) & 0xF];
*sp++ = (char_isprint(*cp) ? *cp : '.');
cp++;
}
}
*hp++ = '\0';
*sp++ = '\0';
passert(hp <= hex + elemsof(hex));
passert(sp <= str + elemsof(str));
llog(rc_flags, logger, "%-*s %s", (int)sizeof(hex)-1, hex, str);
} while (len != 0);
}
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