mirror of
https://github.com/zephyrproject-rtos/zephyr
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8e25695937
Adding net_mgmt_event_notify_with_info() which lets the event notifier to pass dedicated data along with the event. The size of data that can be passed must be limited to the biggest data passed (which will be currently IPv6 + prefix). Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
301 lines
9.2 KiB
C
301 lines
9.2 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief Network Management API public header
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*/
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#ifndef __NET_MGMT_H__
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#define __NET_MGMT_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Network Management
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* @defgroup net_mgmt Network Management
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* @{
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*/
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#include <misc/__assert.h>
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#include <net/net_core.h>
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struct net_if;
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/**
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* @brief NET MGMT event mask basics, normalizing parts of bit fields
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*/
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#define NET_MGMT_EVENT_MASK 0x80000000
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#define NET_MGMT_ON_IFACE_MASK 0x40000000
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#define NET_MGMT_LAYER_MASK 0x30000000
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#define NET_MGMT_SYNC_EVENT_MASK 0x08000000
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#define NET_MGMT_LAYER_CODE_MASK 0x07FF0000
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#define NET_MGMT_COMMAND_MASK 0x0000FFFF
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#define NET_MGMT_EVENT_BIT BIT(31)
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#define NET_MGMT_IFACE_BIT BIT(30)
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#define NET_MGMT_SYNC_EVENT_BIT BIT(27)
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#define NET_MGMT_LAYER(_layer) (_layer << 28)
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#define NET_MGMT_LAYER_CODE(_code) (_code << 16)
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#define NET_MGMT_EVENT(mgmt_request) \
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(mgmt_request & NET_MGMT_EVENT_MASK)
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#define NET_MGMT_ON_IFACE(mgmt_request) \
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(mgmt_request & NET_MGMT_ON_IFACE_MASK)
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#define NET_MGMT_EVENT_SYNCHRONOUS(mgmt_request) \
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(mgmt_request & NET_MGMT_SYNC_EVENT_MASK)
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#define NET_MGMT_GET_LAYER(mgmt_request) \
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((mgmt_request & NET_MGMT_LAYER_MASK) >> 28)
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#define NET_MGMT_GET_LAYER_CODE(mgmt_request) \
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((mgmt_request & NET_MGMT_LAYER_CODE_MASK) >> 16)
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#define NET_MGMT_GET_COMMAND(mgmt_request) \
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(mgmt_request & NET_MGMT_COMMAND_MASK)
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/* Useful generic definitions */
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#define NET_MGMT_LAYER_L1 1
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#define NET_MGMT_LAYER_L2 2
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#define NET_MGMT_LAYER_L3 3
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#include <net/net_event.h>
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/**
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* @typedef net_mgmt_request_handler_t
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* @brief Signature which all Net MGMT request handler need to follow
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* @param mgmt_request The exact request value the handler is being called
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* through
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* @param iface A valid pointer on struct net_if if the request is meant
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* to be tight to a network interface. NULL otherwise.
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* @param data A valid pointer on a data understood by the handler.
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* NULL otherwise.
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* @param len Length in byte of the memory pointed by data.
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*/
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typedef int (*net_mgmt_request_handler_t)(u32_t mgmt_request,
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struct net_if *iface,
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void *data, size_t len);
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#define net_mgmt(_mgmt_request, _iface, _data, _len) \
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net_mgmt_##_mgmt_request(_mgmt_request, _iface, _data, _len)
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#define NET_MGMT_DEFINE_REQUEST_HANDLER(_mgmt_request) \
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extern int net_mgmt_##_mgmt_request(u32_t mgmt_request, \
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struct net_if *iface, \
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void *data, size_t len)
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#define NET_MGMT_REGISTER_REQUEST_HANDLER(_mgmt_request, _func) \
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FUNC_ALIAS(_func, net_mgmt_##_mgmt_request, int)
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struct net_mgmt_event_callback;
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/**
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* @typedef net_mgmt_event_handler_t
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* @brief Define the user's callback handler function signature
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* @param "struct net_mgmt_event_callback *cb"
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* Original struct net_mgmt_event_callback owning this handler.
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* @param "u32_t mgmt_event" The network event being notified.
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* @param "struct net_if *iface" A pointer on a struct net_if to which the
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* the event belongs to, if it's an event on an iface. NULL otherwise.
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*/
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typedef void (*net_mgmt_event_handler_t)(struct net_mgmt_event_callback *cb,
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u32_t mgmt_event,
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struct net_if *iface);
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/**
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* @brief Network Management event callback structure
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* Used to register a callback into the network management event part, in order
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* to let the owner of this struct to get network event notification based on
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* given event mask.
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*/
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struct net_mgmt_event_callback {
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/** Meant to be used internally, to insert the callback into a list.
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* So nobody should mess with it.
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*/
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sys_snode_t node;
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union {
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/** Actual callback function being used to notify the owner
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*/
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net_mgmt_event_handler_t handler;
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/** Semaphore meant to be used internaly for the synchronous
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* net_mgmt_event_wait() function.
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*/
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struct k_sem *sync_call;
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};
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#ifdef CONFIG_NET_MGMT_EVENT_INFO
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const void *info;
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#endif
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/** A mask of network events on which the above handler should be
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* called in case those events come. Such mask can be modified
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* whenever necessary by the owner, and thus will affect the handler
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* being called or not.
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*/
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union {
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/** A mask of network events on which the above handler should
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* be called in case those events come. Such mask can be
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* modified whenever necessary by the owner, and thus will
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* affect the handler being called or not.
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*/
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u32_t event_mask;
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/** Internal place holder when a synchronous event wait is
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* successfully unlocked on a event.
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*/
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u32_t raised_event;
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};
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};
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#ifdef CONFIG_NET_MGMT_EVENT
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/**
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* @brief Helper to initialize a struct net_mgmt_event_callback properly
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* @param cb A valid application's callback structure pointer.
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* @param handler A valid handler function pointer.
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* @param mgmt_event_mask A mask of relevant events for the handler
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*/
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static inline
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void net_mgmt_init_event_callback(struct net_mgmt_event_callback *cb,
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net_mgmt_event_handler_t handler,
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u32_t mgmt_event_mask)
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{
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__ASSERT(cb, "Callback pointer should not be NULL");
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__ASSERT(handler, "Handler pointer should not be NULL");
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cb->handler = handler;
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cb->event_mask = mgmt_event_mask;
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};
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/**
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* @brief Add a user callback
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* @param cb A valid pointer on user's callback to add.
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*/
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void net_mgmt_add_event_callback(struct net_mgmt_event_callback *cb);
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/**
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* @brief Delete a user callback
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* @param cb A valid pointer on user's callback to delete.
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*/
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void net_mgmt_del_event_callback(struct net_mgmt_event_callback *cb);
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/**
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* @brief Used by the system to notify an event.
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* @param mgmt_event The actual network event code to notify
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* @param iface a valid pointer on a struct net_if if only the event is
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* based on an iface. NULL otherwise.
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* @param info a valid pointer on the information you want to pass along
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* with the event. NULL otherwise. Note the data pointed there is
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* normalized by the related event.
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* @param length size of the data pointed by info pointer.
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*
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* Note: info and length are disabled if CONFIG_NET_MGMT_EVENT_INFO
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* is not defined.
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*/
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void net_mgmt_event_notify_with_info(u32_t mgmt_event, struct net_if *iface,
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void *info, size_t length);
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static inline void net_mgmt_event_notify(u32_t mgmt_event, struct net_if *iface)
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{
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net_mgmt_event_notify_with_info(mgmt_event, iface, NULL, 0);
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}
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/**
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* @brief Used to wait synchronously on an event mask
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* @param mgmt_event_mask A mask of relevant events to wait on.
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* @param raised_event a pointer on a u32_t to get which event from
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* the mask generated the event. Can be NULL if the caller is not
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* interested in that information.
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* @param iface a pointer on a place holder for the iface on which the
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* event has originated from. This is valid if only the event mask
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* has bit NET_MGMT_IFACE_BIT set relevantly, depending on events
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* the caller wants to listen to.
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* @param info a valid pointer if user wants to get the information the
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* event might bring along. NULL otherwise.
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* @param timeout a delay in milliseconds. K_FOREVER can be used to wait
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* indefinitely.
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*
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* @return 0 on success, a negative error code otherwise. -ETIMEDOUT will
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* be specifically returned if the timeout kick-in instead of an
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* actual event.
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*/
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int net_mgmt_event_wait(u32_t mgmt_event_mask,
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u32_t *raised_event,
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struct net_if **iface,
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const void **info,
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int timeout);
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/**
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* @brief Used to wait synchronously on an event mask for a specific iface
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* @param iface a pointer on a valid network interface to listen event to
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* @param mgmt_event_mask A mask of relevant events to wait on. Listened
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* to events should be relevant to iface events and thus have the bit
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* NET_MGMT_IFACE_BIT set.
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* @param raised_event a pointer on a u32_t to get which event from
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* the mask generated the event. Can be NULL if the caller is not
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* interested in that information.
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* @param info a valid pointer if user wants to get the information the
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* event might bring along. NULL otherwise.
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* @param timeout a delay in milliseconds. K_FOREVER can be used to wait
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* indefinitely.
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*
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* @return 0 on success, a negative error code otherwise. -ETIMEDOUT will
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* be specifically returned if the timeout kick-in instead of an
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* actual event.
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*/
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int net_mgmt_event_wait_on_iface(struct net_if *iface,
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u32_t mgmt_event_mask,
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u32_t *raised_event,
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const void **info,
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int timeout);
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/**
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* @brief Used by the core of the network stack to initialize the network
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* event processing.
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*/
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void net_mgmt_event_init(void);
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#else
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#define net_mgmt_init_event_callback(...)
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#define net_mgmt_add_event_callback(...)
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#define net_mgmt_event_notify(...)
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#define net_mgmt_event_init(...)
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static inline int net_mgmt_event_wait(u32_t mgmt_event_mask,
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u32_t *raised_event,
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struct net_if **iface,
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const void **info,
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int timeout)
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{
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return 0;
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}
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static inline int net_mgmt_event_wait_on_iface(struct net_if *iface,
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u32_t mgmt_event_mask,
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u32_t *raised_event,
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const void **info,
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int timeout)
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{
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return 0;
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}
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#endif /* CONFIG_NET_MGMT_EVENT */
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* __NET_MGMT_H__ */
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