blob: b2b6ddd8a804c2bc5479a7662e687836e3a606cc [file] [log] [blame]
/** @file
@brief UDP utility functions
*/
/*
* Copyright (c) 2017 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef __UDP_H
#define __UDP_H
#include <zephyr/types.h>
#include <net/net_core.h>
#include <net/net_ip.h>
#include <net/net_pkt.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief UDP library
* @defgroup udp UDP Library
* @ingroup networking
* @{
*/
#if defined(CONFIG_NET_UDP)
/**
* @brief Get UDP packet header data from net_pkt.
*
* @details The values in the returned header are in network byte order.
* Note that you must access the UDP header values by the returned pointer,
* the hdr parameter is just a placeholder for the header data and it might
* not contain anything if the header fits properly in the first fragment of
* the network packet.
*
* @param pkt Network packet
* @param hdr Where to place the header if it does not fit in first fragment
* of the network packet. This might not be populated if UDP header fits in
* net_buf fragment.
*
* @return Return pointer to header or NULL if something went wrong.
* Always use the returned pointer to access the UDP header.
*/
struct net_udp_hdr *net_udp_get_hdr(struct net_pkt *pkt,
struct net_udp_hdr *hdr);
/**
* @brief Set UDP packet header data in net_pkt.
*
* @details The values in the header must be in network byte order.
* This function is normally called after a call to net_udp_get_hdr().
* The hdr parameter value should be the same that is returned by function
* net_udp_get_hdr() call. Note that if the UDP header fits in first net_pkt
* fragment, then this function will not do anything as your hdr parameter
* was pointing directly to net_pkt.
*
* @param pkt Network packet
* @param hdr Header data pointer that was returned by net_udp_get_hdr().
*
* @return Return pointer to header or NULL if something went wrong.
*/
struct net_udp_hdr *net_udp_set_hdr(struct net_pkt *pkt,
struct net_udp_hdr *hdr);
#else
static inline struct net_udp_hdr *net_udp_get_hdr(struct net_pkt *pkt,
struct net_udp_hdr *hdr)
{
return NULL;
}
static inline struct net_udp_hdr *net_udp_set_hdr(struct net_pkt *pkt,
struct net_udp_hdr *hdr)
{
return NULL;
}
#endif /* CONFIG_NET_UDP */
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /* __UDP_H */