/* * Copyright (C) 2015 Freie Universität Berlin * * 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_netapi GNRC communication interface * @ingroup net_gnrc * @brief Generic interface for IPC communication between GNRC modules * * @details The idea of this interface is that it provides every network * module with a basic set of commands to communicate with its * neighboring modules. In this model every module runs in its own * thread and communication is done using the @ref net_gnrc_netapi. * * @{ * * @file * @brief Generic interface to communicate with GNRC modules * * @defgroup net_gnrc_netapi_mbox Mailbox IPC extension * @ingroup net_gnrc_netapi * @brief @ref core_mbox "Mailbox IPC" extension for @ref net_gnrc_netapi * @{ * * @details The submodule `gnrc_netapi_mbox` provides an extension for * @ref core_mbox "Mailbox IPC". * * To use, add the module `gnrc_netapi_mbox` to the `USEMODULE` macro in your * application's Makefile: * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ {.mk} * USEMODULE += gnrc_netapi_mbox * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * @} * * @defgroup net_gnrc_netapi_callbacks Callback extension * @ingroup net_gnrc_netapi * @brief Callback extension for @ref net_gnrc_netapi * @{ * @details The submodule `gnrc_netapi_callbacks` provides an extension for * callbacks to run GNRC thread-less. * * To use, add the module `gnrc_netapi_callbacks` to the `USEMODULE` macro in * your application's Makefile: * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ {.mk} * USEMODULE += gnrc_netapi_callbacks * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * @} * @author Martine Lenders * @author Hauke Petersen */ #ifndef GNRC_NETAPI_H_ #define GNRC_NETAPI_H_ #include "thread.h" #include "net/netopt.h" #include "net/gnrc/nettype.h" #include "net/gnrc/pkt.h" #ifdef __cplusplus extern "C" { #endif /** * @brief @ref core_msg type for passing a @ref net_gnrc_pkt up the network stack */ #define GNRC_NETAPI_MSG_TYPE_RCV (0x0201) /** * @brief @ref core_msg type for passing a @ref net_gnrc_pkt down the network stack */ #define GNRC_NETAPI_MSG_TYPE_SND (0x0202) /** * @brief @ref core_msg type for setting options of network modules */ #define GNRC_NETAPI_MSG_TYPE_SET (0x0203) /** * @brief @ref core_msg type for getting options from network modules */ #define GNRC_NETAPI_MSG_TYPE_GET (0x0204) /** * @brief @ref core_msg type for replying to get and set option messages */ #define GNRC_NETAPI_MSG_TYPE_ACK (0x0205) /** * @brief Data structure to be send for setting (@ref GNRC_NETAPI_MSG_TYPE_SET) * and getting (@ref GNRC_NETAPI_MSG_TYPE_GET) options */ typedef struct { netopt_t opt; /**< the option to get/set */ uint16_t context; /**< (optional) context for that option */ void *data; /**< data to set or buffer to read into */ uint16_t data_len; /**< size of the data / the buffer */ } gnrc_netapi_opt_t; /** * @brief Shortcut function for sending @ref GNRC_NETAPI_MSG_TYPE_SND messages * * @param[in] pid PID of the targeted network module * @param[in] pkt pointer into the packet buffer holding the data to send * * @return 1 if packet was successfully delivered * @return -1 on error (invalid PID or no space in queue) */ int gnrc_netapi_send(kernel_pid_t pid, gnrc_pktsnip_t *pkt); /** * @brief Sends @p cmd to all subscribers to (@p type, @p demux_ctx). * * @param[in] type type of the targeted network module. * @param[in] demux_ctx demultiplexing context for @p type. * @param[in] cmd command for all subscribers * @param[in] pkt pointer into the packet buffer holding the data to send * * @return Number of subscribers to (@p type, @p demux_ctx). */ int gnrc_netapi_dispatch(gnrc_nettype_t type, uint32_t demux_ctx, uint16_t cmd, gnrc_pktsnip_t *pkt); /** * @brief Sends a @ref GNRC_NETAPI_MSG_TYPE_SND command to all subscribers to * (@p type, @p demux_ctx). * * @param[in] type type of the targeted network module. * @param[in] demux_ctx demultiplexing context for @p type. * @param[in] pkt pointer into the packet buffer holding the data to send * * @return Number of subscribers to (@p type, @p demux_ctx). */ static inline int gnrc_netapi_dispatch_send(gnrc_nettype_t type, uint32_t demux_ctx, gnrc_pktsnip_t *pkt) { return gnrc_netapi_dispatch(type, demux_ctx, GNRC_NETAPI_MSG_TYPE_SND, pkt); } /** * @brief Shortcut function for sending @ref GNRC_NETAPI_MSG_TYPE_RCV messages * * @param[in] pid PID of the targeted network module * @param[in] pkt pointer into the packet buffer holding the received data * * @return 1 if packet was successfully delivered * @return -1 on error (invalid PID or no space in queue) */ int gnrc_netapi_receive(kernel_pid_t pid, gnrc_pktsnip_t *pkt); /** * @brief Sends a @ref GNRC_NETAPI_MSG_TYPE_RCV command to all subscribers to * (@p type, @p demux_ctx). * * @param[in] type type of the targeted network module. * @param[in] demux_ctx demultiplexing context for @p type. * @param[in] pkt pointer into the packet buffer holding the data to send * * @return Number of subscribers to (@p type, @p demux_ctx). */ static inline int gnrc_netapi_dispatch_receive(gnrc_nettype_t type, uint32_t demux_ctx, gnrc_pktsnip_t *pkt) { return gnrc_netapi_dispatch(type, demux_ctx, GNRC_NETAPI_MSG_TYPE_RCV, pkt); } /** * @brief Shortcut function for sending @ref GNRC_NETAPI_MSG_TYPE_GET messages and * parsing the returned @ref GNRC_NETAPI_MSG_TYPE_ACK message * * @param[in] pid PID of the targeted network module * @param[in] opt option to get * @param[in] context (optional) context to the given option * @param[in] data pointer to buffer for reading the option's value * @param[in] max_len maximum number of bytes that fit into @p data * * @return value returned by the @ref GNRC_NETAPI_MSG_TYPE_ACK message i.e. the actual * length of the resulting data on success, a negative errno on error. The * actual error value is for the implementation to decide but should be * sensible to indicate what went wrong. */ int gnrc_netapi_get(kernel_pid_t pid, netopt_t opt, uint16_t context, void *data, size_t max_len); /** * @brief Shortcut function for sending @ref GNRC_NETAPI_MSG_TYPE_SET messages and * parsing the returned @ref GNRC_NETAPI_MSG_TYPE_ACK message * * @param[in] pid PID of the targeted network module * @param[in] opt option to set * @param[in] context (optional) context to the given option * @param[in] data data to set the given option to * @param[in] data_len size of @p data * * @return value returned by the @ref GNRC_NETAPI_MSG_TYPE_ACK message i.e. 0 on * success, a negative errno on error. The actual error value is for the * implementation to decide but should be sensible to indicate what went * wrong. */ int gnrc_netapi_set(kernel_pid_t pid, netopt_t opt, uint16_t context, void *data, size_t data_len); #ifdef __cplusplus } #endif #endif /* GNRC_NETAPI_H_ */ /** * @}^ */