Application network context. More...

Data Structures
struct	net_context

Macros
#define	NET_CONTEXT_IN_USE BIT(0)

#define	NET_CONTEXT_FAMILY (BIT(3) \| BIT(4) \| BIT(5))

#define	NET_CONTEXT_TYPE (BIT(6) \| BIT(7))

#define	NET_CONTEXT_REMOTE_ADDR_SET BIT(8)

#define	NET_CONTEXT_ACCEPTING_SOCK BIT(9)

#define	NET_CONTEXT_CLOSING_SOCK BIT(10)

#define	NET_CONTEXT_BOUND_TO_IFACE BIT(11)

#define	NET_CONTEXT_STATE_SHIFT 1

#define	NET_CONTEXT_STATE_MASK 0x03

#define	net_context_setup_pools(context, tx_pool, data_pool)
	Set custom network buffer pools for context send operations. More...

Typedefs
typedef void(*	net_context_recv_cb_t) (struct net_context context, struct net_pkt pkt, union net_ip_header ip_hdr, union net_proto_header proto_hdr, int status, void *user_data)
	Network data receive callback. More...

typedef void(*	net_context_send_cb_t) (struct net_context context, int status, void user_data)
	Network data send callback. More...

typedef void(*	net_tcp_accept_cb_t) (struct net_context new_context, struct sockaddr addr, socklen_t addrlen, int status, void *user_data)
	Accept callback. More...

typedef void(*	net_context_connect_cb_t) (struct net_context context, int status, void user_data)
	Connection callback. More...

typedef struct k_mem_slab (	net_pkt_get_slab_func_t) (void)
	Function that is called to get the slab that is used for net_pkt allocations. More...

typedef struct net_buf_pool (	net_pkt_get_pool_func_t) (void)
	Function that is called to get the pool that is used for net_buf allocations. More...

typedef void(*	net_context_cb_t) (struct net_context context, void user_data)
	Callback used while iterating over network contexts. More...

Enumerations
enum	net_context_state { NET_CONTEXT_IDLE = 0 , NET_CONTEXT_UNCONNECTED = 0 , NET_CONTEXT_CONFIGURING = 1 , NET_CONTEXT_CONNECTING = 1 , NET_CONTEXT_READY = 2 , NET_CONTEXT_CONNECTED = 2 , NET_CONTEXT_LISTENING = 3 }

enum	net_context_option { NET_OPT_PRIORITY = 1 , NET_OPT_TXTIME = 2 , NET_OPT_SOCKS5 = 3 , NET_OPT_RCVTIMEO = 4 , NET_OPT_SNDTIMEO = 5 }

Functions
static bool	net_context_is_used (struct net_context *context)

static bool	net_context_is_bound_to_iface (struct net_context *context)

static bool	net_context_is_accepting (struct net_context *context)
	Is this context is accepting data now. More...

static void	net_context_set_accepting (struct net_context *context, bool accepting)
	Set this context to accept data now. More...

static bool	net_context_is_closing (struct net_context *context)
	Is this context closing. More...

static void	net_context_set_closing (struct net_context *context, bool closing)
	Set this context to closing. More...

static enum net_context_state	net_context_get_state (struct net_context *context)
	Get state for this network context. More...

static void	net_context_set_state (struct net_context *context, enum net_context_state state)
	Set state for this network context. More...

static sa_family_t	net_context_get_family (struct net_context *context)
	Get address family for this network context. More...

static void	net_context_set_family (struct net_context *context, sa_family_t family)
	Set address family for this network context. More...

static enum net_sock_type	net_context_get_type (struct net_context *context)
	Get context type for this network context. More...

static void	net_context_set_type (struct net_context *context, enum net_sock_type type)
	Set context type for this network context. More...

static void	net_context_set_filter_id (struct net_context *context, int filter_id)
	Set CAN filter id for this network context. More...

static int	net_context_get_filter_id (struct net_context *context)
	Get CAN filter id for this network context. More...

static uint16_t	net_context_get_ip_proto (struct net_context *context)
	Get context IP protocol for this network context. More...

static void	net_context_set_ip_proto (struct net_context *context, uint16_t proto)
	Set context IP protocol for this network context. More...

static struct net_if *	net_context_get_iface (struct net_context *context)
	Get network interface for this context. More...

static void	net_context_set_iface (struct net_context context, struct net_if iface)
	Set network interface for this context. More...

static uint8_t	net_context_get_ipv4_ttl (struct net_context *context)

static void	net_context_set_ipv4_ttl (struct net_context *context, uint8_t ttl)

static uint8_t	net_context_get_ipv6_hop_limit (struct net_context *context)

static void	net_context_set_ipv6_hop_limit (struct net_context *context, uint8_t hop_limit)

static void	net_context_set_proxy_enabled (struct net_context *context, bool enable)

static bool	net_context_is_proxy_enabled (struct net_context *context)

int	net_context_get (sa_family_t family, enum net_sock_type type, uint16_t ip_proto, struct net_context **context)
	Get network context. More...

int	net_context_put (struct net_context *context)
	Close and unref a network context. More...

int	net_context_ref (struct net_context *context)
	Take a reference count to a net_context, preventing destruction. More...

int	net_context_unref (struct net_context *context)
	Decrement the reference count to a network context. More...

static int	net_context_create_ipv4_new (struct net_context context, struct net_pkt pkt, const struct in_addr src, const struct in_addr dst)
	Create IPv4 packet in provided net_pkt from context. More...

static int	net_context_create_ipv6_new (struct net_context context, struct net_pkt pkt, const struct in6_addr src, const struct in6_addr dst)
	Create IPv6 packet in provided net_pkt from context. More...

int	net_context_bind (struct net_context context, const struct sockaddr addr, socklen_t addrlen)
	Assign a socket a local address. More...

int	net_context_listen (struct net_context *context, int backlog)
	Mark the context as a listening one. More...

int	net_context_connect (struct net_context context, const struct sockaddr addr, socklen_t addrlen, net_context_connect_cb_t cb, k_timeout_t timeout, void *user_data)
	Create a network connection. More...

int	net_context_accept (struct net_context context, net_tcp_accept_cb_t cb, k_timeout_t timeout, void user_data)
	Accept a network connection attempt. More...

int	net_context_send (struct net_context context, const void buf, size_t len, net_context_send_cb_t cb, k_timeout_t timeout, void *user_data)
	Send data to a peer. More...

int	net_context_sendto (struct net_context context, const void buf, size_t len, const struct sockaddr dst_addr, socklen_t addrlen, net_context_send_cb_t cb, k_timeout_t timeout, void user_data)
	Send data to a peer specified by address. More...

int	net_context_sendmsg (struct net_context context, const struct msghdr msghdr, int flags, net_context_send_cb_t cb, k_timeout_t timeout, void *user_data)
	Send data in iovec to a peer specified in msghdr struct. More...

int	net_context_recv (struct net_context context, net_context_recv_cb_t cb, k_timeout_t timeout, void user_data)
	Receive network data from a peer specified by context. More...

int	net_context_update_recv_wnd (struct net_context *context, int32_t delta)
	Update TCP receive window for context. More...

int	net_context_set_option (struct net_context context, enum net_context_option option, const void value, size_t len)
	Set an connection option for this context. More...

int	net_context_get_option (struct net_context context, enum net_context_option option, void value, size_t *len)
	Get connection option value for this context. More...

void	net_context_foreach (net_context_cb_t cb, void *user_data)
	Go through all the network connections and call callback for each network context. More...

bool	net_context_port_in_use (enum net_ip_protocol ip_proto, uint16_t local_port, const struct sockaddr *local_addr)
	Check if a port is in use (bound) More...

Detailed Description

Application network context.

Macro Definition Documentation

◆ NET_CONTEXT_ACCEPTING_SOCK

#define NET_CONTEXT_ACCEPTING_SOCK BIT(9)

#include <include/net/net_context.h>

Is the socket accepting connections

◆ NET_CONTEXT_BOUND_TO_IFACE

#define NET_CONTEXT_BOUND_TO_IFACE BIT(11)

#include <include/net/net_context.h>

◆ NET_CONTEXT_CLOSING_SOCK

#define NET_CONTEXT_CLOSING_SOCK BIT(10)

#include <include/net/net_context.h>

Is the socket closing / closed

◆ NET_CONTEXT_FAMILY

#define NET_CONTEXT_FAMILY (BIT(3) | BIT(4) | BIT(5))

#include <include/net/net_context.h>

The address family, connection type and IP protocol are stored into a bit field to save space. Protocol family of this connection

◆ NET_CONTEXT_IN_USE

#define NET_CONTEXT_IN_USE BIT(0)

#include <include/net/net_context.h>

Is this context used or not

◆ NET_CONTEXT_REMOTE_ADDR_SET

#define NET_CONTEXT_REMOTE_ADDR_SET BIT(8)

#include <include/net/net_context.h>

Remote address set

◆ net_context_setup_pools

#define net_context_setup_pools	(	context,
		tx_pool,
		data_pool
	)

#include <include/net/net_context.h>

Set custom network buffer pools for context send operations.

Set custom network buffer pools used by the IP stack to allocate network buffers used by the context when sending data to the network. Using dedicated buffers may help make send operations on a given context more reliable, e.g. not be subject to buffer starvation due to operations on other network contexts. Buffer pools are set per context, but several contexts may share the same buffers. Note that there's no support for per-context custom receive packet pools.

Parameters

context	Context that will use the given net_buf pools.
tx_pool	Pointer to the function that will return TX pool to the caller. The TX pool is used when sending data to network. There is one TX net_pkt for each network packet that is sent.
data_pool	Pointer to the function that will return DATA pool to the caller. The DATA pool is used to store data that is sent to the network.

◆ NET_CONTEXT_STATE_MASK

#define NET_CONTEXT_STATE_MASK 0x03

#include <include/net/net_context.h>

◆ NET_CONTEXT_STATE_SHIFT

#define NET_CONTEXT_STATE_SHIFT 1

#include <include/net/net_context.h>

◆ NET_CONTEXT_TYPE

#define NET_CONTEXT_TYPE (BIT(6) | BIT(7))

#include <include/net/net_context.h>

Type of the connection (datagram / stream / raw)

Typedef Documentation

◆ net_context_cb_t

net_context_cb_t

#include <include/net/net_context.h>

Callback used while iterating over network contexts.

Parameters

context	A valid pointer on current network context
user_data	A valid pointer on some user data or NULL

◆ net_context_connect_cb_t

net_context_connect_cb_t

#include <include/net/net_context.h>

Connection callback.

The connect callback is called after a connection is being established. For TCP connections, this callback is called by RX thread so its stack and execution context is used here. The callback is called after the TCP connection was established or if the connection failed. Keep processing in the callback minimal to reduce the time spent blocked while handling packets. For UDP connections, this callback is called immediately by net_context_connect() function. UDP is a connectionless protocol so the connection can be thought of being established immediately.

Parameters

context	The context to use.
status	Status of the connection establishment. This is 0 if the connection was established successfully, <0 if there was an error.
user_data	The user data given in net_context_connect() call.

◆ net_context_recv_cb_t

net_context_recv_cb_t

#include <include/net/net_context.h>

Network data receive callback.

The recv callback is called after a network data packet is received. This callback is called by RX thread so its stack and execution context is used here. Keep processing in the callback minimal to reduce the time spent blocked while handling packets.

Parameters

context	The context to use.
pkt	Network buffer that is received. If the pkt is not NULL, then the callback will own the buffer and it needs to to unref the pkt as soon as it has finished working with it. On EOF, pkt will be NULL.
ip_hdr	a pointer to relevant IP (v4 or v6) header.
proto_hdr	a pointer to relevant protocol (udp or tcp) header.
status	Value is set to 0 if some data or the connection is at EOF, <0 if there was an error receiving data, in this case the pkt parameter is set to NULL.
user_data	The user data given in net_recv() call.

◆ net_context_send_cb_t

net_context_send_cb_t

#include <include/net/net_context.h>

Network data send callback.

The send callback is called after a network data packet is sent. This callback is called by TX thread so its stack and execution context is used here. Keep processing in the callback minimal to reduce the time spent blocked while handling packets.

Parameters

context	The context to use.
status	Value is set to >= 0: amount of data that was sent, < 0 there was an error sending data.
user_data	The user data given in net_send() call.

◆ net_pkt_get_pool_func_t

net_pkt_get_pool_func_t

#include <include/net/net_context.h>

Function that is called to get the pool that is used for net_buf allocations.

Returns: Pointer to valid struct net_buf_pool instance.

◆ net_pkt_get_slab_func_t

net_pkt_get_slab_func_t

#include <include/net/net_context.h>

Function that is called to get the slab that is used for net_pkt allocations.

Returns: Pointer to valid struct k_mem_slab instance.

◆ net_tcp_accept_cb_t

net_tcp_accept_cb_t

#include <include/net/net_context.h>

Accept callback.

The accept callback is called after a successful connection was established or if there was an error while we were waiting for a connection attempt. This callback is called by RX thread so its stack and execution context is used here. Keep processing in the callback minimal to reduce the time spent blocked while handling packets.

Parameters

new_context	The context to use.
addr	The peer address.
addrlen	Length of the peer address.
status	The status code, 0 on success, < 0 otherwise
user_data	The user data given in net_context_accept() call.

Enumeration Type Documentation

◆ net_context_option

enum net_context_option

#include <include/net/net_context.h>

Enumerator
NET_OPT_PRIORITY
NET_OPT_TXTIME
NET_OPT_SOCKS5
NET_OPT_RCVTIMEO
NET_OPT_SNDTIMEO

◆ net_context_state

enum net_context_state

#include <include/net/net_context.h>

State of the context (bits 1 & 2 in the flags)

Enumerator
NET_CONTEXT_IDLE
NET_CONTEXT_UNCONNECTED
NET_CONTEXT_CONFIGURING
NET_CONTEXT_CONNECTING
NET_CONTEXT_READY
NET_CONTEXT_CONNECTED
NET_CONTEXT_LISTENING

Function Documentation

◆ net_context_accept()

int net_context_accept	(	struct net_context *	context,
		net_tcp_accept_cb_t	cb,
		k_timeout_t	timeout,
		void *	user_data
	)

#include <include/net/net_context.h>

Accept a network connection attempt.

Accept a connection being established. This function will return immediately if the timeout is set to K_NO_WAIT. In this case the context will call the supplied callback when ever there is a connection established to this context. This is "a register handler and forget" type of call (async). If the timeout is set to K_FOREVER, the function will wait until the connection is established. Timeout value > 0, will wait as many ms. After the connection is established a caller-supplied callback is called. The callback is called even if timeout was set to K_FOREVER, the callback is called before this function will return in this case. The callback is not called if the timeout expires. This is similar as BSD accept() function.

Parameters

context	The context to use.
cb	Caller-supplied callback function.
timeout	Timeout for the connection. Possible values are K_FOREVER, K_NO_WAIT, >0.
user_data	Caller-supplied user data.

Returns: 0 if ok, < 0 if error

◆ net_context_bind()

int net_context_bind	(	struct net_context *	context,
		const struct sockaddr *	addr,
		socklen_t	addrlen
	)

#include <include/net/net_context.h>

Assign a socket a local address.

This is similar as BSD bind() function.

Parameters

context	The context to be assigned.
addr	Address to assigned.
addrlen	Length of the address.

Returns: 0 if ok, < 0 if error

◆ net_context_connect()

int net_context_connect	(	struct net_context *	context,
		const struct sockaddr *	addr,
		socklen_t	addrlen,
		net_context_connect_cb_t	cb,
		k_timeout_t	timeout,
		void *	user_data
	)

#include <include/net/net_context.h>

Create a network connection.

The net_context_connect function creates a network connection to the host specified by addr. After the connection is established, the user-supplied callback (cb) is executed. cb is called even if the timeout was set to K_FOREVER. cb is not called if the timeout expires. For datagram sockets (SOCK_DGRAM), this function only sets the peer address. This function is similar to the BSD connect() function.

Parameters

context	The network context.
addr	The peer address to connect to.
addrlen	Peer address length.
cb	Callback function. Set to NULL if not required.
timeout	The timeout value for the connection. Possible values: K_NO_WAIT: this function will return immediately, K_FOREVER: this function will block until the connection is established, >0: this function will wait the specified ms.
user_data	Data passed to the callback function.

Returns: 0 on success.; -EINVAL if an invalid parameter is passed as an argument.; -ENOTSUP if the operation is not supported or implemented.; -ETIMEDOUT if the connect operation times out.

◆ net_context_create_ipv4_new()

static int net_context_create_ipv4_new	(	struct net_context *	context,
		struct net_pkt *	pkt,
		const struct in_addr *	src,
		const struct in_addr *	dst
	)

inlinestatic

#include <include/net/net_context.h>

Create IPv4 packet in provided net_pkt from context.

Parameters

context	Network context for a connection
pkt	Network packet
src	Source address, or NULL to choose a default
dst	Destination IPv4 address

Returns: Return 0 on success, negative errno otherwise.

◆ net_context_create_ipv6_new()

static int net_context_create_ipv6_new	(	struct net_context *	context,
		struct net_pkt *	pkt,
		const struct in6_addr *	src,
		const struct in6_addr *	dst
	)

inlinestatic

#include <include/net/net_context.h>

Create IPv6 packet in provided net_pkt from context.

Parameters

context	Network context for a connection
pkt	Network packet
src	Source address, or NULL to choose a default from context
dst	Destination IPv6 address

Returns: Return 0 on success, negative errno otherwise.

◆ net_context_foreach()

void net_context_foreach	(	net_context_cb_t	cb,
		void *	user_data
	)

#include <include/net/net_context.h>

Go through all the network connections and call callback for each network context.

Parameters

cb	User-supplied callback function to call.
user_data	User specified data.

◆ net_context_get()

int net_context_get	(	sa_family_t	family,
		enum net_sock_type	type,
		uint16_t	ip_proto,
		struct net_context **	context
	)

#include <include/net/net_context.h>

Get network context.

Network context is used to define the connection 5-tuple (protocol, remote address, remote port, source address and source port). Random free port number will be assigned to source port when context is created. This is similar as BSD socket() function. The context will be created with a reference count of 1.

Parameters

family	IP address family (AF_INET or AF_INET6)
type	Type of the socket, SOCK_STREAM or SOCK_DGRAM
ip_proto	IP protocol, IPPROTO_UDP or IPPROTO_TCP. For raw socket access, the value is the L2 protocol value from IEEE 802.3 (see ethernet.h)
context	The allocated context is returned to the caller.

Returns: 0 if ok, < 0 if error

◆ net_context_get_family()

static sa_family_t net_context_get_family ( struct net_context * context )

inlinestatic

#include <include/net/net_context.h>

Get address family for this network context.

This function returns the address family (IPv4 or IPv6) of the context.

Parameters

context Network context.

Returns: Network state.

◆ net_context_get_filter_id()

static int net_context_get_filter_id ( struct net_context * context )

inlinestatic

#include <include/net/net_context.h>

Get CAN filter id for this network context.

This function gets the CAN filter id of the context.

Parameters

context Network context.

Returns: Filter id of this network context

◆ net_context_get_iface()

static struct net_if * net_context_get_iface ( struct net_context * context )

inlinestatic

#include <include/net/net_context.h>

Get network interface for this context.

This function returns the used network interface.

Parameters

context Network context.

Returns: Context network interface if context is bind to interface, NULL otherwise.

◆ net_context_get_ip_proto()

static uint16_t net_context_get_ip_proto ( struct net_context * context )

inlinestatic

#include <include/net/net_context.h>

Get context IP protocol for this network context.

This function returns the IP protocol (UDP / TCP / IEEE 802.3 protocol value) of the context.

Parameters

context Network context.

Returns: Network context IP protocol.

◆ net_context_get_ipv4_ttl()

static uint8_t net_context_get_ipv4_ttl ( struct net_context * context )

inlinestatic

#include <include/net/net_context.h>

◆ net_context_get_ipv6_hop_limit()

static uint8_t net_context_get_ipv6_hop_limit ( struct net_context * context )

inlinestatic

#include <include/net/net_context.h>

◆ net_context_get_option()

int net_context_get_option	(	struct net_context *	context,
		enum net_context_option	option,
		void *	value,
		size_t *	len
	)

#include <include/net/net_context.h>

Get connection option value for this context.

Parameters

context	The network context to use.
option	Option to set
value	Option value
len	Option length (returned to caller)

Returns: 0 if ok, <0 if error

◆ net_context_get_state()

static enum net_context_state net_context_get_state ( struct net_context * context )

inlinestatic

#include <include/net/net_context.h>

Get state for this network context.

This function returns the state of the context.

Parameters

context Network context.

Returns: Network state.

◆ net_context_get_type()

static enum net_sock_type net_context_get_type ( struct net_context * context )

inlinestatic

#include <include/net/net_context.h>

Get context type for this network context.

This function returns the context type (stream, datagram or raw) of the context.

Parameters

context Network context.

Returns: Network context type.

◆ net_context_is_accepting()

static bool net_context_is_accepting ( struct net_context * context )

inlinestatic

#include <include/net/net_context.h>

Is this context is accepting data now.

Parameters

context Network context.

Returns: True if the context is accepting connections, False otherwise.

◆ net_context_is_bound_to_iface()

static bool net_context_is_bound_to_iface ( struct net_context * context )

inlinestatic

#include <include/net/net_context.h>

◆ net_context_is_closing()

static bool net_context_is_closing ( struct net_context * context )

inlinestatic

#include <include/net/net_context.h>

Is this context closing.

Parameters

context Network context.

Returns: True if the context is closing, False otherwise.

◆ net_context_is_proxy_enabled()

static bool net_context_is_proxy_enabled ( struct net_context * context )

inlinestatic

#include <include/net/net_context.h>

◆ net_context_is_used()

static bool net_context_is_used ( struct net_context * context )

inlinestatic

#include <include/net/net_context.h>

◆ net_context_listen()

int net_context_listen	(	struct net_context *	context,
		int	backlog
	)

#include <include/net/net_context.h>

Mark the context as a listening one.

This is similar as BSD listen() function.

Parameters

context	The context to use.
backlog	The size of the pending connections backlog.

Returns: 0 if ok, < 0 if error

◆ net_context_port_in_use()

bool net_context_port_in_use	(	enum net_ip_protocol	ip_proto,
		uint16_t	local_port,
		const struct sockaddr *	local_addr
	)

#include <include/net/net_context.h>

Check if a port is in use (bound)

This function checks if a port is bound with respect to the specified ip_proto and local_addr.

Parameters

ip_proto	the IP protocol
local_port	the port to check
local_addr	the network address

Returns: true if the port is bound; false if the port is not bound

◆ net_context_put()

int net_context_put ( struct net_context * context )

#include <include/net/net_context.h>

Close and unref a network context.

This releases the context. It is not possible to send or receive data via this context after this call. This is similar as BSD shutdown() function. For legacy compatibility, this function will implicitly decrement the reference count and possibly destroy the context either now or when it reaches a final state.

Parameters

context The context to be closed.

Returns: 0 if ok, < 0 if error

◆ net_context_recv()

int net_context_recv	(	struct net_context *	context,
		net_context_recv_cb_t	cb,
		k_timeout_t	timeout,
		void *	user_data
	)

#include <include/net/net_context.h>

Receive network data from a peer specified by context.

This function can be used to register a callback function that is called by the network stack when network data has been received for this context. As this function registers a callback, then there is no need to call this function multiple times if timeout is set to K_NO_WAIT. If callback function or user data changes, then the function can be called multiple times to register new values. This function will return immediately if the timeout is set to K_NO_WAIT. If the timeout is set to K_FOREVER, the function will wait until the network buffer is received. Timeout value > 0 will wait as many ms. After the network buffer is received, a caller-supplied callback is called. The callback is called even if timeout was set to K_FOREVER, the callback is called before this function will return in this case. The callback is not called if the timeout expires. The timeout functionality can be compiled out if synchronous behavior is not needed. The sync call logic requires some memory that can be saved if only async way of call is used. If CONFIG_NET_CONTEXT_SYNC_RECV is not set, then the timeout parameter value is ignored. This is similar as BSD recv() function. Note that net_context_bind() should be called before net_context_recv(). Default random port number is assigned to local port. Only bind() will update connection information from context. If recv() is called before bind() call, it may refuse to bind to a context which already has a connection associated.

Parameters

context	The network context to use.
cb	Caller-supplied callback function.
timeout	Caller-supplied timeout. Possible values are K_FOREVER, K_NO_WAIT, >0.
user_data	Caller-supplied user data.

Returns: 0 if ok, < 0 if error

◆ net_context_ref()

int net_context_ref ( struct net_context * context )

#include <include/net/net_context.h>

Take a reference count to a net_context, preventing destruction.

Network contexts are not recycled until their reference count reaches zero. Note that this does not prevent any "close" behavior that results from errors or net_context_put. It simply prevents the context from being recycled for further use.

Parameters

context The context on which to increment the reference count

Returns: The new reference count

◆ net_context_send()

int net_context_send	(	struct net_context *	context,
		const void *	buf,
		size_t	len,
		net_context_send_cb_t	cb,
		k_timeout_t	timeout,
		void *	user_data
	)

#include <include/net/net_context.h>

Send data to a peer.

This function can be used to send network data to a peer connection. After the network buffer is sent, a caller-supplied callback is called. Note that the callback might be called after this function has returned. For context of type SOCK_DGRAM, the destination address must have been set by the call to net_context_connect(). This is similar as BSD send() function.

Parameters

context	The network context to use.
buf	The data buffer to send
len	Length of the buffer
cb	Caller-supplied callback function.
timeout	Currently this value is not used.
user_data	Caller-supplied user data.

Returns: 0 if ok, < 0 if error

◆ net_context_sendmsg()

int net_context_sendmsg	(	struct net_context *	context,
		const struct msghdr *	msghdr,
		int	flags,
		net_context_send_cb_t	cb,
		k_timeout_t	timeout,
		void *	user_data
	)

#include <include/net/net_context.h>

Send data in iovec to a peer specified in msghdr struct.

This function has similar semantics as Posix sendmsg() call. For unconnected socket, the msg_name field in msghdr must be set. For connected socket the msg_name should be set to NULL, and msg_namelen to 0. After the network buffer is sent, a caller-supplied callback is called. Note that the callback might be called after this function has returned.

Parameters

context	The network context to use.
msghdr	The data to send
flags	Flags for the sending.
cb	Caller-supplied callback function.
timeout	Currently this value is not used.
user_data	Caller-supplied user data.

Returns: numbers of bytes sent on success, a negative errno otherwise

◆ net_context_sendto()

int net_context_sendto	(	struct net_context *	context,
		const void *	buf,
		size_t	len,
		const struct sockaddr *	dst_addr,
		socklen_t	addrlen,
		net_context_send_cb_t	cb,
		k_timeout_t	timeout,
		void *	user_data
	)

#include <include/net/net_context.h>

Send data to a peer specified by address.

This function can be used to send network data to a peer specified by address. This variant can only be used for datagram connections of type SOCK_DGRAM. After the network buffer is sent, a caller-supplied callback is called. Note that the callback might be called after this function has returned. This is similar as BSD sendto() function.

Parameters

context	The network context to use.
buf	The data buffer to send
len	Length of the buffer
dst_addr	Destination address.
addrlen	Length of the address.
cb	Caller-supplied callback function.
timeout	Currently this value is not used.
user_data	Caller-supplied user data.

Returns: numbers of bytes sent on success, a negative errno otherwise

◆ net_context_set_accepting()

static void net_context_set_accepting	(	struct net_context *	context,
		bool	accepting
	)

inlinestatic

#include <include/net/net_context.h>

Set this context to accept data now.

Parameters

context	Network context.
accepting	True if accepting, False if not

◆ net_context_set_closing()

static void net_context_set_closing	(	struct net_context *	context,
		bool	closing
	)

inlinestatic

#include <include/net/net_context.h>

Set this context to closing.

Parameters

context	Network context.
closing	True if closing, False if not

◆ net_context_set_family()

static void net_context_set_family	(	struct net_context *	context,
		sa_family_t	family
	)

inlinestatic

#include <include/net/net_context.h>

Set address family for this network context.

This function sets the address family (IPv4, IPv6 or AF_PACKET) of the context.

Parameters

context	Network context.
family	Address family (AF_INET, AF_INET6, AF_PACKET, AF_CAN)

◆ net_context_set_filter_id()

static void net_context_set_filter_id	(	struct net_context *	context,
		int	filter_id
	)

inlinestatic

#include <include/net/net_context.h>

Set CAN filter id for this network context.

This function sets the CAN filter id of the context.

Parameters

context	Network context.
filter_id	CAN filter id

◆ net_context_set_iface()

static void net_context_set_iface	(	struct net_context *	context,
		struct net_if *	iface
	)

inlinestatic

#include <include/net/net_context.h>

Set network interface for this context.

This function binds network interface to this context.

Parameters

context	Network context.
iface	Network interface.

◆ net_context_set_ip_proto()

static void net_context_set_ip_proto	(	struct net_context *	context,
		uint16_t	proto
	)

inlinestatic

#include <include/net/net_context.h>

Set context IP protocol for this network context.

This function sets the context IP protocol (UDP / TCP) of the context.

Parameters

context	Network context.
proto	Context IP protocol (IPPROTO_UDP, IPPROTO_TCP or IEEE 802.3 protocol value)

◆ net_context_set_ipv4_ttl()

static void net_context_set_ipv4_ttl	(	struct net_context *	context,
		uint8_t	ttl
	)

inlinestatic

#include <include/net/net_context.h>

◆ net_context_set_ipv6_hop_limit()

static void net_context_set_ipv6_hop_limit	(	struct net_context *	context,
		uint8_t	hop_limit
	)

inlinestatic

#include <include/net/net_context.h>

◆ net_context_set_option()

int net_context_set_option	(	struct net_context *	context,
		enum net_context_option	option,
		const void *	value,
		size_t	len
	)

#include <include/net/net_context.h>

Set an connection option for this context.

Parameters

context	The network context to use.
option	Option to set
value	Option value
len	Option length

Returns: 0 if ok, <0 if error

◆ net_context_set_proxy_enabled()

static void net_context_set_proxy_enabled	(	struct net_context *	context,
		bool	enable
	)

inlinestatic

#include <include/net/net_context.h>

◆ net_context_set_state()

static void net_context_set_state	(	struct net_context *	context,
		enum net_context_state	state
	)

inlinestatic

#include <include/net/net_context.h>

Set state for this network context.

This function sets the state of the context.

Parameters

context	Network context.
state	New network context state.

◆ net_context_set_type()

static void net_context_set_type	(	struct net_context *	context,
		enum net_sock_type	type
	)

inlinestatic

#include <include/net/net_context.h>

Set context type for this network context.

This function sets the context type (stream or datagram) of the context.

Parameters

context	Network context.
type	Context type (SOCK_STREAM or SOCK_DGRAM)

◆ net_context_unref()

int net_context_unref ( struct net_context * context )

#include <include/net/net_context.h>

Decrement the reference count to a network context.

Decrements the refcount. If it reaches zero, the context will be recycled. Note that this does not cause any network-visible "close" behavior (i.e. future packets to this connection may see TCP RST or ICMP port unreachable responses). See net_context_put() for that.

Parameters

context The context on which to decrement the reference count

Returns: The new reference count, zero if the context was destroyed

◆ net_context_update_recv_wnd()

int net_context_update_recv_wnd	(	struct net_context *	context,
		int32_t	delta
	)

#include <include/net/net_context.h>

Update TCP receive window for context.

This function should be used by an application which doesn't fully process incoming data in its receive callback, but for example, queues it. In this case, receive callback should decrease the window (call this function with a negative value) by the size of queued data, and function(s) which dequeue data - with positive value corresponding to the dequeued size. For example, if receive callback gets a packet with the data size of 256 and queues it, it should call this function with delta of -256. If a function extracts 10 bytes of the queued data, it should call it with delta of 10.

Parameters

context	The TCP network context to use.
delta	Size, in bytes, by which to increase TCP receive window (negative value to decrease).

Returns: 0 if ok, < 0 if error

Data Structures

Macros

Typedefs

Enumerations

Functions

Detailed Description

Macro Definition Documentation

◆ NET_CONTEXT_ACCEPTING_SOCK

◆ NET_CONTEXT_BOUND_TO_IFACE

◆ NET_CONTEXT_CLOSING_SOCK

◆ NET_CONTEXT_FAMILY

◆ NET_CONTEXT_IN_USE

◆ NET_CONTEXT_REMOTE_ADDR_SET

◆ net_context_setup_pools

◆ NET_CONTEXT_STATE_MASK

◆ NET_CONTEXT_STATE_SHIFT

◆ NET_CONTEXT_TYPE

Typedef Documentation

◆ net_context_cb_t

◆ net_context_connect_cb_t

◆ net_context_recv_cb_t

◆ net_context_send_cb_t

◆ net_pkt_get_pool_func_t

◆ net_pkt_get_slab_func_t

◆ net_tcp_accept_cb_t

Enumeration Type Documentation

◆ net_context_option

◆ net_context_state

Function Documentation

◆ net_context_accept()

◆ net_context_bind()

◆ net_context_connect()

◆ net_context_create_ipv4_new()

◆ net_context_create_ipv6_new()

◆ net_context_foreach()

◆ net_context_get()

◆ net_context_get_family()

◆ net_context_get_filter_id()

◆ net_context_get_iface()

◆ net_context_get_ip_proto()

◆ net_context_get_ipv4_ttl()

◆ net_context_get_ipv6_hop_limit()

◆ net_context_get_option()

◆ net_context_get_state()

◆ net_context_get_type()

◆ net_context_is_accepting()

◆ net_context_is_bound_to_iface()

◆ net_context_is_closing()

◆ net_context_is_proxy_enabled()

◆ net_context_is_used()

◆ net_context_listen()

◆ net_context_port_in_use()

◆ net_context_put()

◆ net_context_recv()

◆ net_context_ref()

◆ net_context_send()

◆ net_context_sendmsg()

◆ net_context_sendto()

◆ net_context_set_accepting()

◆ net_context_set_closing()

◆ net_context_set_family()

◆ net_context_set_filter_id()

◆ net_context_set_iface()

◆ net_context_set_ip_proto()

◆ net_context_set_ipv4_ttl()

◆ net_context_set_ipv6_hop_limit()

◆ net_context_set_option()

◆ net_context_set_proxy_enabled()

◆ net_context_set_state()

◆ net_context_set_type()

◆ net_context_unref()

◆ net_context_update_recv_wnd()