112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
/** @file
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@brief UDP data handler
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This is not to be included by the application and is only used by
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core IP stack.
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*/
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/*
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* Copyright (c) 2017 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef __UDP_INTERNAL_H
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#define __UDP_INTERNAL_H
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#include <zephyr/types.h>
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#include <net/net_core.h>
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#include <net/net_ip.h>
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#include <net/net_pkt.h>
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#include <net/net_context.h>
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#include "connection.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined(CONFIG_NET_UDP)
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/**
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* @brief Set UDP checksum in network packet.
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*
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* @param pkt Network packet
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* @param frag Fragment where to start calculating the offset.
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* Typically this is set to pkt->frags by the caller.
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*
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* @return Return the actual fragment where the checksum was written.
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*/
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struct net_buf *net_udp_set_chksum(struct net_pkt *pkt, struct net_buf *frag);
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/**
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* @brief Get UDP checksum from network packet.
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*
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* @param pkt Network packet
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* @param frag Fragment where to start calculating the offset.
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* Typically this is set to pkt->frags by the caller.
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*
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* @return Return the checksum in host byte order.
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*/
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u16_t net_udp_get_chksum(struct net_pkt *pkt, struct net_buf *frag);
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/**
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* @brief Insert UDP packet into net_pkt after specific offset.
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*
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* @param pkt Network packet
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* @param offset Offset where to insert (typically after IP header)
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* @param src_port Destination port in network byte order.
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* @param dst_port Destination port in network byte order.
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*
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* @return Return network packet that contains the UDP packet or NULL if
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* there is an failure.
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*/
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struct net_pkt *net_udp_insert(struct net_pkt *pkt,
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u16_t offset,
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u16_t src_port,
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u16_t dst_port);
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#else
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#define net_udp_insert(pkt, offset, src_port, dst_port) (pkt)
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#define net_udp_get_chksum(pkt, frag) (0)
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#define net_udp_set_chksum(pkt, frag) NULL
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#endif /* CONFIG_NET_UDP */
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/**
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* @brief Register a callback to be called when UDP packet
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* is received corresponding to received packet.
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*
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* @param remote_addr Remote address of the connection end point.
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* @param local_addr Local address of the connection end point.
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* @param remote_port Remote port of the connection end point.
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* @param local_port Local port of the connection end point.
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* @param cb Callback to be called
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* @param user_data User data supplied by caller.
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* @param handle UDP handle that can be used when unregistering
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*
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* @return Return 0 if the registration succeed, <0 otherwise.
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*/
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int net_udp_register(const struct sockaddr *remote_addr,
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const struct sockaddr *local_addr,
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u16_t remote_port,
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u16_t local_port,
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net_conn_cb_t cb,
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void *user_data,
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struct net_conn_handle **handle);
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/**
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* @brief Unregister UDP handler.
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*
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* @param handle Handle from registering.
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*
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* @return Return 0 if the unregistration succeed, <0 otherwise.
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*/
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int net_udp_unregister(struct net_conn_handle *handle);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __UDP_INTERNAL_H */
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