net_context.h File Reference

Network context definitions. More...

#include <zephyr/kernel.h>
#include <zephyr/sys/atomic.h>
#include <zephyr/net/net_ip.h>
#include <zephyr/net/net_if.h>
#include <zephyr/net/net_stats.h>

Go to the source code of this file.

Data Structures
struct	net_context
	Note that we do not store the actual source IP address in the context because the address is already be set in the network interface struct. More...

Macros
#define	NET_CONTEXT_IN_USE   BIT(0)
	Is this context used or not.
#define	NET_CONTEXT_FAMILY   (BIT(3) | BIT(4) | BIT(5))
	The address family, connection type and IP protocol are stored into a bit field to save space.
#define	NET_CONTEXT_TYPE   (BIT(6) | BIT(7))
	Type of the connection (datagram / stream / raw)
#define	NET_CONTEXT_REMOTE_ADDR_SET   BIT(8)
	Remote address set.
#define	NET_CONTEXT_ACCEPTING_SOCK   BIT(9)
	Is the socket accepting connections.
#define	NET_CONTEXT_CLOSING_SOCK   BIT(10)
	Is the socket closing / closed.
#define	NET_CONTEXT_BOUND_TO_IFACE   BIT(11)
	Context is bound to a specific interface.
#define	net_context_setup_pools(context, tx_pool, data_pool)
	Set custom network buffer pools for context send operations.

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.
typedef void(*	net_context_send_cb_t) (struct net_context *context, int status, void *user_data)
	Network data send callback.
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.
typedef void(*	net_context_connect_cb_t) (struct net_context *context, int status, void *user_data)
	Connection callback.
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.
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.
typedef void(*	net_context_cb_t) (struct net_context *context, void *user_data)
	Callback used while iterating over network contexts.

Enumerations
enum	net_context_option {   NET_OPT_PRIORITY = 1 , NET_OPT_TXTIME = 2 , NET_OPT_SOCKS5 = 3 , NET_OPT_RCVTIMEO = 4 ,   NET_OPT_SNDTIMEO = 5 , NET_OPT_RCVBUF = 6 , NET_OPT_SNDBUF = 7 , NET_OPT_DSCP_ECN = 8 ,   NET_OPT_REUSEADDR = 9 , NET_OPT_REUSEPORT = 10 , NET_OPT_IPV6_V6ONLY = 11 , NET_OPT_RECV_PKTINFO = 12 ,   NET_OPT_MCAST_TTL = 13 , NET_OPT_MCAST_HOP_LIMIT = 14 , NET_OPT_UNICAST_HOP_LIMIT = 15 , NET_OPT_TTL = 16 ,   NET_OPT_ADDR_PREFERENCES = 17 , NET_OPT_TIMESTAMPING = 18 }
	Network context options. More...

Functions
static bool	net_context_is_used (struct net_context *context)
	Is this context used or not.
static bool	net_context_is_bound_to_iface (struct net_context *context)
	Is this context bound to a network interface.
static bool	net_context_is_accepting (struct net_context *context)
	Is this context is accepting data now.
static void	net_context_set_accepting (struct net_context *context, bool accepting)
	Set this context to accept data now.
static bool	net_context_is_closing (struct net_context *context)
	Is this context closing.
static void	net_context_set_closing (struct net_context *context, bool closing)
	Set this context to closing.
static enum net_context_state	net_context_get_state (struct net_context *context)
	Get state for this network context.
static void	net_context_set_state (struct net_context *context, enum net_context_state state)
	Set state for this network context.
static sa_family_t	net_context_get_family (struct net_context *context)
	Get address family for this network context.
static void	net_context_set_family (struct net_context *context, sa_family_t family)
	Set address family for this network context.
static enum net_sock_type	net_context_get_type (struct net_context *context)
	Get context type for this network context.
static void	net_context_set_type (struct net_context *context, enum net_sock_type type)
	Set context type for this network context.
static void	net_context_set_can_filter_id (struct net_context *context, int filter_id)
	Set CAN filter id for this network context.
static int	net_context_get_can_filter_id (struct net_context *context)
	Get CAN filter id for this network context.
static uint16_t	net_context_get_proto (struct net_context *context)
	Get context IP protocol for this network context.
static void	net_context_set_proto (struct net_context *context, uint16_t proto)
	Set context IP protocol for this network context.
static struct net_if *	net_context_get_iface (struct net_context *context)
	Get network interface for this context.
static void	net_context_set_iface (struct net_context *context, struct net_if *iface)
	Set network interface for this context.
static void	net_context_bind_iface (struct net_context *context, struct net_if *iface)
	Bind network interface to this context.
static uint8_t	net_context_get_ipv4_ttl (struct net_context *context)
	Get IPv4 TTL (time-to-live) value for this context.
static void	net_context_set_ipv4_ttl (struct net_context *context, uint8_t ttl)
	Set IPv4 TTL (time-to-live) value for this context.
static uint8_t	net_context_get_ipv4_mcast_ttl (struct net_context *context)
	Get IPv4 multicast TTL (time-to-live) value for this context.
static void	net_context_set_ipv4_mcast_ttl (struct net_context *context, uint8_t ttl)
	Set IPv4 multicast TTL (time-to-live) value for this context.
static uint8_t	net_context_get_ipv6_hop_limit (struct net_context *context)
	Get IPv6 hop limit value for this context.
static void	net_context_set_ipv6_hop_limit (struct net_context *context, uint8_t hop_limit)
	Set IPv6 hop limit value for this context.
static uint8_t	net_context_get_ipv6_mcast_hop_limit (struct net_context *context)
	Get IPv6 multicast hop limit value for this context.
static void	net_context_set_ipv6_mcast_hop_limit (struct net_context *context, uint8_t hop_limit)
	Set IPv6 multicast hop limit value for this context.
static void	net_context_set_proxy_enabled (struct net_context *context, bool enable)
	Enable or disable socks proxy support for this context.
static bool	net_context_is_proxy_enabled (struct net_context *context)
	Is socks proxy support enabled or disabled for this 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.
int	net_context_put (struct net_context *context)
	Close and unref a network context.
int	net_context_ref (struct net_context *context)
	Take a reference count to a net_context, preventing destruction.
int	net_context_unref (struct net_context *context)
	Decrement the reference count to a network context.
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.
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.
int	net_context_bind (struct net_context *context, const struct sockaddr *addr, socklen_t addrlen)
	Assign a socket a local address.
int	net_context_listen (struct net_context *context, int backlog)
	Mark the context as a listening one.
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.
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.
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.
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.
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.
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.
int	net_context_update_recv_wnd (struct net_context *context, int32_t delta)
	Update TCP receive window for context.
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.
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.
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.
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)

Detailed Description

Network context definitions.

An API for applications to define a network connection.