in_cksum.h

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#pragma once
#include "ws_symbol_export.h"
 
typedef struct {
    const uint8_t *ptr;
    int len;
} vec_t;
 
#define SET_CKSUM_VEC_PTR(vecelem, data, length) \
    G_STMT_START { \
        vecelem.ptr = (data); \
        vecelem.len = (length); \
    } G_STMT_END
 
#define SET_CKSUM_VEC_TVB(vecelem, tvb, offset, length) \
    G_STMT_START { \
        vecelem.len = (length); \
        vecelem.ptr = tvb_get_ptr((tvb), (offset), vecelem.len); \
    } G_STMT_END
 
WS_DLL_PUBLIC uint16_t ip_checksum(const uint8_t *ptr, int len);
 
WS_DLL_PUBLIC uint16_t ip_checksum_tvb(tvbuff_t *tvb, int offset, int len);
 
WS_DLL_PUBLIC int in_cksum_ret_partial(const vec_t *vec, int veclen, uint16_t *partial);
 
WS_DLL_PUBLIC int in_cksum(const vec_t *vec, int veclen);
 
WS_DLL_PUBLIC uint16_t in_cksum_shouldbe(uint16_t sum, uint16_t computed_sum);