forked from osmocom/wireshark
63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
/* in_cksum.h
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* Declaration of Internet checksum routine.
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*
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* Copyright (c) 1988, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef __IN_CKSUM_H__
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#define __IN_CKSUM_H__
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#include "ws_symbol_export.h"
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typedef struct {
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const guint8 *ptr;
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int len;
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} vec_t;
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#define SET_CKSUM_VEC_PTR(vecelem, data, length) \
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G_STMT_START { \
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vecelem.ptr = (data); \
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vecelem.len = (length); \
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} G_STMT_END
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#define SET_CKSUM_VEC_TVB(vecelem, tvb, offset, length) \
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G_STMT_START { \
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vecelem.len = (length); \
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vecelem.ptr = tvb_get_ptr((tvb), (offset), vecelem.len); \
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} G_STMT_END
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WS_DLL_PUBLIC guint16 ip_checksum(const guint8 *ptr, int len);
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WS_DLL_PUBLIC guint16 ip_checksum_tvb(tvbuff_t *tvb, int offset, int len);
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WS_DLL_PUBLIC int in_cksum(const vec_t *vec, int veclen);
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guint16 in_cksum_shouldbe(guint16 sum, guint16 computed_sum);
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#endif /* __IN_CKSUM_H__ */
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