lwIP network interface abstraction

#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/ip_addr.h"
#include "lwip/netif.h"
#include "lwip/tcp_impl.h"
#include "lwip/snmp.h"
#include "lwip/igmp.h"
#include "netif/etharp.h"
#include "lwip/stats.h"

Macros
#define	NETIF_LINK_CALLBACK(n)

#define	NETIF_STATUS_CALLBACK(n) do{ if (n->status_callback) { (n->status_callback)(n); }}while(0)

Functions
struct netif *	netif_add (struct netif netif, ip_addr_t ipaddr, ip_addr_t netmask, ip_addr_t gw, void *state, netif_init_fn init, netif_input_fn input)
	Add a network interface to the list of lwIP netifs. More...

struct netif *	netif_find (char *name)
	Find a network interface by searching for its name. More...

void	netif_init (void)

void	netif_remove (struct netif *netif)
	Remove a network interface from the list of lwIP netifs. More...

void	netif_set_addr (struct netif netif, ip_addr_t ipaddr, ip_addr_t netmask, ip_addr_t gw)
	Change IP address configuration for a network interface (including netmask and default gateway). More...

void	netif_set_default (struct netif *netif)
	Set a network interface as the default network interface (used to output all packets for which no specific route is found) More...

void	netif_set_down (struct netif *netif)
	Bring an interface down, disabling any traffic processing. More...

void	netif_set_gw (struct netif netif, ip_addr_t gw)
	Change the default gateway for a network interface. More...

void	netif_set_ipaddr (struct netif netif, ip_addr_t ipaddr)
	Change the IP address of a network interface. More...

void	netif_set_link_down (struct netif *netif)
	Called by a driver when its link goes down. More...

void	netif_set_link_up (struct netif *netif)
	Called by a driver when its link goes up. More...

void	netif_set_netmask (struct netif netif, ip_addr_t netmask)
	Change the netmask of a network interface. More...

void	netif_set_status_callback (struct netif *netif, netif_status_callback_fn status_callback)
	Set callback to be called when interface is brought up/down. More...

void	netif_set_up (struct netif *netif)
	Bring an interface up, available for processing traffic. More...

Variables
struct netif *	netif_default
	The default network interface. More...

struct netif *	netif_list
	The list of network interfaces. More...

static u8_t	netif_num

#define NETIF_LINK_CALLBACK ( n )

Referenced by netif_set_link_down(), and netif_set_link_up().

#define NETIF_STATUS_CALLBACK ( n ) do{ if (n->status_callback) { (n->status_callback)(n); }}while(0)

Referenced by netif_set_down(), and netif_set_up().

struct netif* netif_add	(	struct netif *	netif,
		ip_addr_t *	ipaddr,
		ip_addr_t *	netmask,
		ip_addr_t *	gw,
		void *	state,
		netif_init_fn	init,
		netif_input_fn	input
	)

Add a network interface to the list of lwIP netifs.

Parameters

netif	a pre-allocated netif structure
ipaddr	IP address for the new netif
netmask	network mask for the new netif
gw	default gateway IP address for the new netif
state	opaque data passed to the new netif
init	callback function that initializes the interface
input	callback function that is called to pass ingress packets up in the protocol layer stack.

Returns: netif, or NULL if failed.

References ERR_OK, netif::flags, netif::gw, netif::input, netif::ip_addr, ip_addr_debug_print, ip_addr_set_zero, LWIP_ASSERT, LWIP_DEBUGF, netif::name, NETIF_DEBUG, NETIF_FLAG_IGMP, netif_list, netif_num, netif_set_addr(), NETIF_SET_HWADDRHINT, netif::netmask, netif::next, NULL, netif::num, snmp_inc_iflist, netif::state, and netif::status_callback.

Referenced by ethernet_configure_interface(), and netif_init().

struct netif* netif_find ( char * name )

Find a network interface by searching for its name.

Parameters

name	the name of the netif (like netif->name) plus concatenated number in ascii representation (e.g. 'en0')

References LWIP_DEBUGF, netif::name, NETIF_DEBUG, netif::next, NULL, and netif::num.

void netif_init ( void )

References IP4_ADDR, ip_input(), netif_add(), netif_set_up(), and NULL.

Referenced by lwip_init().

void netif_remove ( struct netif * netif )

Remove a network interface from the list of lwIP netifs.

Parameters

netif the network interface to remove

References netif::flags, LWIP_DEBUGF, NETIF_DEBUG, NETIF_FLAG_IGMP, netif_is_up, netif_set_default(), netif_set_down(), netif::next, NULL, snmp_dec_iflist, and snmp_delete_ipaddridx_tree.

void netif_set_addr	(	struct netif *	netif,
		ip_addr_t *	ipaddr,
		ip_addr_t *	netmask,
		ip_addr_t *	gw
	)

Change IP address configuration for a network interface (including netmask and default gateway).

Parameters

netif	the network interface to change
ipaddr	the new IP address
netmask	the new netmask
gw	the new default gateway

References netif_set_gw(), netif_set_ipaddr(), and netif_set_netmask().

Referenced by netif_add().

void netif_set_default ( struct netif * netif )

Set a network interface as the default network interface (used to output all packets for which no specific route is found)

Parameters

netif the default network interface

References LWIP_DEBUGF, netif::name, NETIF_DEBUG, NULL, snmp_delete_iprteidx_tree, and snmp_insert_iprteidx_tree.

Referenced by ethernet_configure_interface(), and netif_remove().

void netif_set_down ( struct netif * netif )

Bring an interface down, disabling any traffic processing.

Note: : Enabling DHCP on a down interface will make it come up once configured.

See Also: dhcp_start()

References etharp_cleanup_netif(), netif::flags, NETIF_FLAG_ETHARP, NETIF_FLAG_UP, NETIF_STATUS_CALLBACK, and snmp_get_sysuptime.

Referenced by netif_remove().

void netif_set_gw	(	struct netif *	netif,
		ip_addr_t *	gw
	)

Change the default gateway for a network interface.

Parameters

netif	the network interface to change
gw	the new default gateway

Note: call netif_set_addr() if you also want to change ip address and netmask

References netif::gw, ip4_addr1_16, ip4_addr2_16, ip4_addr3_16, ip4_addr4_16, ip_addr_set, LWIP_DBG_STATE, LWIP_DBG_TRACE, LWIP_DEBUGF, netif::name, NETIF_DEBUG, and U16_F.

Referenced by netif_set_addr().

void netif_set_ipaddr	(	struct netif *	netif,
		ip_addr_t *	ipaddr
	)

Change the IP address of a network interface.

Parameters

netif	the network interface to change
ipaddr	the new IP address

Note: call netif_set_addr() if you also want to change netmask and default gateway

References ip4_addr1_16, ip4_addr2_16, ip4_addr3_16, ip4_addr4_16, netif::ip_addr, ip_addr_cmp, ip_addr_isany, ip_addr_islinklocal, ip_addr_set, tcp_listen_pcbs_t::listen_pcbs, LWIP_DBG_STATE, LWIP_DBG_TRACE, LWIP_DEBUGF, netif::name, NETIF_DEBUG, next, NULL, snmp_delete_ipaddridx_tree, snmp_delete_iprteidx_tree, snmp_insert_ipaddridx_tree, snmp_insert_iprteidx_tree, tcp_abort(), tcp_active_pcbs, tcp_listen_pcbs, and U16_F.

Referenced by netif_set_addr().

void netif_set_link_down ( struct netif * netif )

Called by a driver when its link goes down.

References netif::flags, NETIF_FLAG_LINK_UP, and NETIF_LINK_CALLBACK.

void netif_set_link_up ( struct netif * netif )

Called by a driver when its link goes up.

References etharp_gratuitous, netif::flags, NETIF_FLAG_ETHARP, NETIF_FLAG_IGMP, NETIF_FLAG_LINK_UP, NETIF_FLAG_UP, and NETIF_LINK_CALLBACK.

void netif_set_netmask	(	struct netif *	netif,
		ip_addr_t *	netmask
	)

Change the netmask of a network interface.

Parameters

netif	the network interface to change
netmask	the new netmask

Note: call netif_set_addr() if you also want to change ip address and default gateway

References ip4_addr1_16, ip4_addr2_16, ip4_addr3_16, ip4_addr4_16, ip_addr_set, LWIP_DBG_STATE, LWIP_DBG_TRACE, LWIP_DEBUGF, netif::name, NETIF_DEBUG, netif::netmask, snmp_delete_iprteidx_tree, snmp_insert_iprteidx_tree, and U16_F.

Referenced by netif_set_addr().

void netif_set_status_callback	(	struct netif *	netif,
		netif_status_callback_fn	status_callback
	)

Set callback to be called when interface is brought up/down.

References netif::status_callback, and status_callback().

Referenced by ethernet_configure_interface().

void netif_set_up ( struct netif * netif )

Bring an interface up, available for processing traffic.

Note: : Enabling DHCP on a down interface will make it come up once configured.

See Also: dhcp_start()

References etharp_gratuitous, netif::flags, NETIF_FLAG_ETHARP, NETIF_FLAG_IGMP, NETIF_FLAG_LINK_UP, NETIF_FLAG_UP, NETIF_STATUS_CALLBACK, and snmp_get_sysuptime.

Referenced by ethernet_configure_interface(), and netif_init().

struct netif* netif_default

The default network interface.

Referenced by ip_route().

struct netif* netif_list

The list of network interfaces.

Referenced by ip_input(), ip_route(), and netif_add().

u8_t netif_num

static

Referenced by netif_add().

Microchip® Advanced Software Framework

Macros

Functions

Variables