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