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#ifndef GNUNET_VPN_CHECKSUM_H
#define GNUNET_VPN_CHECKSUM_H
#include <platform.h>
uint32_t
calculate_checksum_update (uint32_t sum, uint16_t * hdr, short len);
uint16_t
calculate_checksum_end (uint32_t sum);
/**
* Calculate the checksum of an IPv4-Header
*/
uint16_t
calculate_ip_checksum (uint16_t * hdr, short len);
#endif /* end of include guard: GNUNET-VPN-CHECKSUM_H */
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