1 /* in_cksum.h 2 * Declaration of Internet checksum routine. 3 * 4 * Copyright (c) 1988, 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * SPDX-License-Identifier: BSD-3-Clause 8 */ 9 10 #ifndef __IN_CKSUM_H__ 11 #define __IN_CKSUM_H__ 12 13 #include "ws_symbol_export.h" 14 15 typedef struct { 16 const guint8 *ptr; 17 int len; 18 } vec_t; 19 20 #define SET_CKSUM_VEC_PTR(vecelem, data, length) \ 21 G_STMT_START { \ 22 vecelem.ptr = (data); \ 23 vecelem.len = (length); \ 24 } G_STMT_END 25 26 #define SET_CKSUM_VEC_TVB(vecelem, tvb, offset, length) \ 27 G_STMT_START { \ 28 vecelem.len = (length); \ 29 vecelem.ptr = tvb_get_ptr((tvb), (offset), vecelem.len); \ 30 } G_STMT_END 31 32 WS_DLL_PUBLIC guint16 ip_checksum(const guint8 *ptr, int len); 33 34 WS_DLL_PUBLIC guint16 ip_checksum_tvb(tvbuff_t *tvb, int offset, int len); 35 36 WS_DLL_PUBLIC int in_cksum(const vec_t *vec, int veclen); 37 38 guint16 in_cksum_shouldbe(guint16 sum, guint16 computed_sum); 39 40 #endif /* __IN_CKSUM_H__ */ 41