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/*
* This file is part of the Nice GLib ICE library.
*
* (C) 2008-2009 Collabora Ltd.
* Contact: Youness Alaoui
* (C) 2007 Nokia Corporation. All rights reserved.
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Nice GLib ICE library.
*
* The Initial Developers of the Original Code are Collabora Ltd and Nokia
* Corporation. All Rights Reserved.
*
* Contributors:
* Youness Alaoui, Collabora Ltd.
*
* Alternatively, the contents of this file may be used under the terms of the
* the GNU Lesser General Public License Version 2.1 (the "LGPL"), in which
* case the provisions of LGPL are applicable instead of those above. If you
* wish to allow use of your version of this file only under the terms of the
* LGPL and not to allow others to use your version of this file under the
* MPL, indicate your decision by deleting the provisions above and replace
* them with the notice and other provisions required by the LGPL. If you do
* not delete the provisions above, a recipient may use your version of this
* file under either the MPL or the LGPL.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef _WIN32
#include <winsock2.h>
#else
#include <sys/socket.h>
#include <netinet/in.h> /* htons() */
#endif
#include <string.h>
#include <stdlib.h>
#include "stun5389.h"
#include "stuncrc32.h"
#include "stunmessage.h"
static const char utf8_skip_data[256] = {
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,6,1,1
};
#define next_utf8_char(p) (char *)((p) + \
utf8_skip_data[*(const unsigned char *)(p)])
uint32_t stun_fingerprint (const uint8_t *msg, size_t len,
bool wlm2009_stupid_crc32_typo)
{
crc_data data[3];
uint16_t fakelen = htons (len - 20u);
// assert (len >= 28u);
data[0].buf = (void *)msg;
data[0].len = 2;
data[1].buf = (uint8_t *)&fakelen;
data[1].len = 2;
data[2].buf = (void *)(msg + 4);
/* first 4 bytes done, last 8 bytes not summed */
data[2].len = len - 12u;
return htonl (stun_crc32 (data, 3, wlm2009_stupid_crc32_typo) ^ 0x5354554e);
}
bool stun_message_has_cookie (const StunMessage *msg)
{
StunTransactionId id;
uint32_t cookie = htonl (STUN_MAGIC_COOKIE);
stun_message_id (msg, id);
return memcmp (id, &cookie, sizeof (cookie)) == 0;
}
StunMessageReturn stun_message_append_software (StunMessage *msg,
const char *software)
{
int len = 0;
const char *ptr = NULL;
if (software == NULL)
software = PACKAGE_STRING;
ptr = software;
while (*ptr && len < 128) {
ptr = next_utf8_char (ptr);
len++;
}
return stun_message_append_bytes (msg, STUN_ATTRIBUTE_SOFTWARE, software,
ptr - software);
}
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