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89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
/*
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* Copyright (C) 2014 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @defgroup net_help Net help
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* @ingroup net
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* @brief Helper functions for networking as byte order conversions and checksum calculations
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* @{
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*
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* @file net_help.h
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*
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* @author Oliver Gesch <oliver.gesch@googlemail.com>
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*/
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#ifndef __NET_HELP_H
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#define __NET_HELP_H
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#include <string.h>
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#include <stdint.h>
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#if defined(__MACH__)
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#include "clang_compat.h"
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#endif
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#include "byteorder.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define BITSET(var,pos) ((var) & (1<<(pos)))
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static inline uint16_t HTONS(uint16_t a)
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{
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return byteorder_htons(a).u16;
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}
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static inline uint32_t HTONL(uint32_t a)
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{
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return byteorder_htonl(a).u32;
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}
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static inline uint64_t HTONLL(uint64_t a)
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{
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return byteorder_htonll(a).u64;
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}
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static inline uint16_t NTOHS(uint16_t a)
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{
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return byteorder_ntohs(*(network_uint16_t *) &a);
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}
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static inline uint32_t NTOHL(uint32_t a)
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{
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return byteorder_ntohl(*(network_uint32_t *) &a);
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}
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static inline uint64_t NTOHLL(uint64_t a)
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{
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return byteorder_ntohll(*(network_uint64_t *) &a);
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}
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/**
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* @brief Computes the Internet Checksum for *buf* with initial value *init*
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*
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* @see <a href="https://tools.ietf.org/html/rfc1071">
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* RFC 1071
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* </a>
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*
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* @param[in] init Initial value for the checksum (0 in most cases)
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* @param[in] buf A byte array to calculate the checksum of
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* @param[in] buf_len Length of *buf*
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*
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* @return The Internet Checksum of *buf* with initial value *init*
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*/
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uint16_t net_help_csum(uint16_t init, uint8_t *buf, uint16_t buf_len);
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#ifdef __cplusplus
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}
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#endif
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/** @} */
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#endif /* __NET_HELP_H */
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