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net_mgmt.h
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net_mgmt.h
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/*
* Copyright (c) 2016 Intel Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief Network Management API public header
*/
#ifndef ZEPHYR_INCLUDE_NET_NET_MGMT_H_
#define ZEPHYR_INCLUDE_NET_NET_MGMT_H_
#include <zephyr/sys/__assert.h>
#include <zephyr/net/net_core.h>
#include <zephyr/net/net_event.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Network Management
* @defgroup net_mgmt Network Management
* @ingroup networking
* @{
*/
struct net_if;
/** @cond INTERNAL_HIDDEN */
/**
* @brief NET MGMT event mask basics, normalizing parts of bit fields
*/
#define NET_MGMT_EVENT_MASK 0x80000000
#define NET_MGMT_ON_IFACE_MASK 0x40000000
#define NET_MGMT_LAYER_MASK 0x30000000
#define NET_MGMT_SYNC_EVENT_MASK 0x08000000
#define NET_MGMT_LAYER_CODE_MASK 0x07FF0000
#define NET_MGMT_COMMAND_MASK 0x0000FFFF
#define NET_MGMT_EVENT_BIT BIT(31)
#define NET_MGMT_IFACE_BIT BIT(30)
#define NET_MGMT_SYNC_EVENT_BIT BIT(27)
#define NET_MGMT_LAYER(_layer) (_layer << 28)
#define NET_MGMT_LAYER_CODE(_code) (_code << 16)
#define NET_MGMT_EVENT(mgmt_request) \
(mgmt_request & NET_MGMT_EVENT_MASK)
#define NET_MGMT_ON_IFACE(mgmt_request) \
(mgmt_request & NET_MGMT_ON_IFACE_MASK)
#define NET_MGMT_EVENT_SYNCHRONOUS(mgmt_request) \
(mgmt_request & NET_MGMT_SYNC_EVENT_MASK)
#define NET_MGMT_GET_LAYER(mgmt_request) \
((mgmt_request & NET_MGMT_LAYER_MASK) >> 28)
#define NET_MGMT_GET_LAYER_CODE(mgmt_request) \
((mgmt_request & NET_MGMT_LAYER_CODE_MASK) >> 16)
#define NET_MGMT_GET_COMMAND(mgmt_request) \
(mgmt_request & NET_MGMT_COMMAND_MASK)
/* Useful generic definitions */
#define NET_MGMT_LAYER_L2 1
#define NET_MGMT_LAYER_L3 2
#define NET_MGMT_LAYER_L4 3
/** @endcond */
/**
* @typedef net_mgmt_request_handler_t
* @brief Signature which all Net MGMT request handler need to follow
* @param mgmt_request The exact request value the handler is being called
* through
* @param iface A valid pointer on struct net_if if the request is meant
* to be tight to a network interface. NULL otherwise.
* @param data A valid pointer on a data understood by the handler.
* NULL otherwise.
* @param len Length in byte of the memory pointed by data.
*/
typedef int (*net_mgmt_request_handler_t)(uint32_t mgmt_request,
struct net_if *iface,
void *data, size_t len);
#define net_mgmt(_mgmt_request, _iface, _data, _len) \
net_mgmt_##_mgmt_request(_mgmt_request, _iface, _data, _len)
#define NET_MGMT_DEFINE_REQUEST_HANDLER(_mgmt_request) \
extern int net_mgmt_##_mgmt_request(uint32_t mgmt_request, \
struct net_if *iface, \
void *data, size_t len)
#define NET_MGMT_REGISTER_REQUEST_HANDLER(_mgmt_request, _func) \
FUNC_ALIAS(_func, net_mgmt_##_mgmt_request, int)
struct net_mgmt_event_callback;
/**
* @typedef net_mgmt_event_handler_t
* @brief Define the user's callback handler function signature
* @param cb Original struct net_mgmt_event_callback owning this handler.
* @param mgmt_event The network event being notified.
* @param iface A pointer on a struct net_if to which the the event belongs to,
* if it's an event on an iface. NULL otherwise.
*/
typedef void (*net_mgmt_event_handler_t)(struct net_mgmt_event_callback *cb,
uint32_t mgmt_event,
struct net_if *iface);
/**
* @brief Network Management event callback structure
* Used to register a callback into the network management event part, in order
* to let the owner of this struct to get network event notification based on
* given event mask.
*/
struct net_mgmt_event_callback {
/** Meant to be used internally, to insert the callback into a list.
* So nobody should mess with it.
*/
sys_snode_t node;
union {
/** Actual callback function being used to notify the owner
*/
net_mgmt_event_handler_t handler;
/** Semaphore meant to be used internally for the synchronous
* net_mgmt_event_wait() function.
*/
struct k_sem *sync_call;
};
#ifdef CONFIG_NET_MGMT_EVENT_INFO
const void *info;
size_t info_length;
#endif
/** A mask of network events on which the above handler should be
* called in case those events come. Such mask can be modified
* whenever necessary by the owner, and thus will affect the handler
* being called or not.
*/
union {
/** A mask of network events on which the above handler should
* be called in case those events come.
* Note that only the command part is treated as a mask,
* matching one to several commands. Layer and layer code will
* be made of an exact match. This means that in order to
* receive events from multiple layers, one must have multiple
* listeners registered, one for each layer being listened.
*/
uint32_t event_mask;
/** Internal place holder when a synchronous event wait is
* successfully unlocked on a event.
*/
uint32_t raised_event;
};
};
/**
* @brief Helper to initialize a struct net_mgmt_event_callback properly
* @param cb A valid application's callback structure pointer.
* @param handler A valid handler function pointer.
* @param mgmt_event_mask A mask of relevant events for the handler
*/
#ifdef CONFIG_NET_MGMT_EVENT
static inline
void net_mgmt_init_event_callback(struct net_mgmt_event_callback *cb,
net_mgmt_event_handler_t handler,
uint32_t mgmt_event_mask)
{
__ASSERT(cb, "Callback pointer should not be NULL");
__ASSERT(handler, "Handler pointer should not be NULL");
cb->handler = handler;
cb->event_mask = mgmt_event_mask;
};
#else
#define net_mgmt_init_event_callback(...)
#endif
/**
* @brief Add a user callback
* @param cb A valid pointer on user's callback to add.
*/
#ifdef CONFIG_NET_MGMT_EVENT
void net_mgmt_add_event_callback(struct net_mgmt_event_callback *cb);
#else
#define net_mgmt_add_event_callback(...)
#endif
/**
* @brief Delete a user callback
* @param cb A valid pointer on user's callback to delete.
*/
#ifdef CONFIG_NET_MGMT_EVENT
void net_mgmt_del_event_callback(struct net_mgmt_event_callback *cb);
#else
#define net_mgmt_del_event_callback(...)
#endif
/**
* @brief Used by the system to notify an event.
* @param mgmt_event The actual network event code to notify
* @param iface a valid pointer on a struct net_if if only the event is
* based on an iface. NULL otherwise.
* @param info a valid pointer on the information you want to pass along
* with the event. NULL otherwise. Note the data pointed there is
* normalized by the related event.
* @param length size of the data pointed by info pointer.
*
* Note: info and length are disabled if CONFIG_NET_MGMT_EVENT_INFO
* is not defined.
*/
#ifdef CONFIG_NET_MGMT_EVENT
void net_mgmt_event_notify_with_info(uint32_t mgmt_event, struct net_if *iface,
const void *info, size_t length);
static inline void net_mgmt_event_notify(uint32_t mgmt_event,
struct net_if *iface)
{
net_mgmt_event_notify_with_info(mgmt_event, iface, NULL, 0);
}
#else
#define net_mgmt_event_notify(...)
#define net_mgmt_event_notify_with_info(...)
#endif
/**
* @brief Used to wait synchronously on an event mask
* @param mgmt_event_mask A mask of relevant events to wait on.
* @param raised_event a pointer on a uint32_t to get which event from
* the mask generated the event. Can be NULL if the caller is not
* interested in that information.
* @param iface a pointer on a place holder for the iface on which the
* event has originated from. This is valid if only the event mask
* has bit NET_MGMT_IFACE_BIT set relevantly, depending on events
* the caller wants to listen to.
* @param info a valid pointer if user wants to get the information the
* event might bring along. NULL otherwise.
* @param info_length tells how long the info memory area is. Only valid if
* the info is not NULL.
* @param timeout A timeout delay. K_FOREVER can be used to wait indefinitely.
*
* @return 0 on success, a negative error code otherwise. -ETIMEDOUT will
* be specifically returned if the timeout kick-in instead of an
* actual event.
*/
#ifdef CONFIG_NET_MGMT_EVENT
int net_mgmt_event_wait(uint32_t mgmt_event_mask,
uint32_t *raised_event,
struct net_if **iface,
const void **info,
size_t *info_length,
k_timeout_t timeout);
#else
static inline int net_mgmt_event_wait(uint32_t mgmt_event_mask,
uint32_t *raised_event,
struct net_if **iface,
const void **info,
size_t *info_length,
k_timeout_t timeout)
{
return 0;
}
#endif
/**
* @brief Used to wait synchronously on an event mask for a specific iface
* @param iface a pointer on a valid network interface to listen event to
* @param mgmt_event_mask A mask of relevant events to wait on. Listened
* to events should be relevant to iface events and thus have the bit
* NET_MGMT_IFACE_BIT set.
* @param raised_event a pointer on a uint32_t to get which event from
* the mask generated the event. Can be NULL if the caller is not
* interested in that information.
* @param info a valid pointer if user wants to get the information the
* event might bring along. NULL otherwise.
* @param info_length tells how long the info memory area is. Only valid if
* the info is not NULL.
* @param timeout A timeout delay. K_FOREVER can be used to wait indefinitely.
*
* @return 0 on success, a negative error code otherwise. -ETIMEDOUT will
* be specifically returned if the timeout kick-in instead of an
* actual event.
*/
#ifdef CONFIG_NET_MGMT_EVENT
int net_mgmt_event_wait_on_iface(struct net_if *iface,
uint32_t mgmt_event_mask,
uint32_t *raised_event,
const void **info,
size_t *info_length,
k_timeout_t timeout);
#else
static inline int net_mgmt_event_wait_on_iface(struct net_if *iface,
uint32_t mgmt_event_mask,
uint32_t *raised_event,
const void **info,
size_t *info_length,
k_timeout_t timeout)
{
return 0;
}
#endif
/**
* @brief Used by the core of the network stack to initialize the network
* event processing.
*/
#ifdef CONFIG_NET_MGMT_EVENT
void net_mgmt_event_init(void);
#else
#define net_mgmt_event_init(...)
#endif /* CONFIG_NET_MGMT_EVENT */
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /* ZEPHYR_INCLUDE_NET_NET_MGMT_H_ */