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/*
* Copyright (C) 2015 Martine Lenders <mlenders@inf.fu-berlin.de>
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @defgroup net_gnrc_conn GNRC-specific implementation of the connection API
* @ingroup net_gnrc
* @brief Provides an implementation of the @ref net_conn by the
* @ref net_gnrc
*
* @{
*
* @file
* @brief GNRC-specific types and function definitions
*
* @author Martine Lenders <mlenders@inf.fu-berlin.de>
*/
#ifndef GNRC_CONN_H_
#define GNRC_CONN_H_
#include <stdbool.h>
#include <stdint.h>
#include "net/ipv6/addr.h"
#include "net/gnrc.h"
#include "sched.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Connection base class
* @internal
*/
typedef struct {
gnrc_nettype_t l3_type; /**< Network layer type of the connection */
gnrc_nettype_t l4_type; /**< Transport layer type of the connection */
gnrc_netreg_entry_t netreg_entry; /**< @p net_ng_netreg entry for the connection */
} conn_t;
/**
* @brief Raw connection type
* @internal
* @extends conn_t
*/
struct conn_ip {
gnrc_nettype_t l3_type; /**< Network layer type of the connection. */
gnrc_nettype_t l4_type; /**< Transport layer type of the connection.
* Always GNRC_NETTYPE_UNDEF */
gnrc_netreg_entry_t netreg_entry; /**< @p net_ng_netreg entry for the connection */
uint8_t local_addr[sizeof(ipv6_addr_t)]; /**< local IP address */
size_t local_addr_len; /**< length of struct conn_ip::local_addr */
};
/**
* @brief UDP connection type
* @internal
* @extends conn_t
*/
struct conn_udp {
gnrc_nettype_t l3_type; /**< Network layer type of the connection.
* Always GNRC_NETTYPE_IPV6 */
gnrc_nettype_t l4_type; /**< Transport layer type of the connection.
* Always GNRC_NETTYPE_UDP */
gnrc_netreg_entry_t netreg_entry; /**< @p net_ng_netreg entry for the connection */
uint8_t local_addr[sizeof(ipv6_addr_t)]; /**< local IP address */
size_t local_addr_len; /**< length of struct conn_ip::local_addr */
};
/**
* @brief Bind connection to demux context
*
* @internal
*
* @param[out] entry @ref net_ng_netreg entry.
* @param[in] type @ref net_ng_nettype.
* @param[in] demux_ctx demux context (port or proto) for the connection.
*/
static inline void gnrc_conn_reg(gnrc_netreg_entry_t *entry, gnrc_nettype_t type,
uint32_t demux_ctx)
{
gnrc_netreg_entry_init_pid(entry, demux_ctx, sched_active_pid);
gnrc_netreg_register(type, entry);
}
/**
* @brief Sets local address for a connection
*
* @internal
*
* @param[out] conn_addr Pointer to the local address on the connection.
* @param[in] addr An IPv6 address.
*
* @return true, if @p addr was a legal address (`::`, `::1` or an address assigned to any
* interface of this node) for the connection.
* @return false if @p addr was not a legal address for the connection.
*/
bool gnrc_conn6_set_local_addr(uint8_t *conn_addr, const ipv6_addr_t *addr);
/**
* @brief Generic recvfrom
*
* @internal
*
* @param[in] conn Connection object.
* @param[out] data Pointer where the received data should be stored.
* @param[in] max_len Maximum space available at @p data.
* @param[out] addr NULL pointer or the sender's IP address. Must fit address of connection's
* family if not NULL.
* @param[out] addr_len Length of @p addr. May be NULL if @p addr is NULL.
* @param[out] port NULL pointer or the sender's port.
*
* @return The number of bytes received on success.
* @return 0, if no received data is available, but everything is in order.
* @return -ENOMEM, if received data was more than max_len.
* @returne -ETIMEDOUT, if more than 3 IPC messages were not @ref net_ng_netapi receive commands
* with the required headers in the packet
*/
int gnrc_conn_recvfrom(conn_t *conn, void *data, size_t max_len, void *addr, size_t *addr_len,
uint16_t *port);
#ifdef __cplusplus
}
#endif
#endif /* GNRC_CONN_H_ */
/** @} */
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