ACD

Functions
err_t	acd_add (struct netif *netif, struct acd *acd, acd_conflict_callback_t acd_conflict_callback)
void	acd_remove (struct netif *netif, struct acd *acd)
err_t	acd_start (struct netif *netif, struct acd *acd, ip4_addr_t ipaddr)
err_t	acd_stop (struct acd *acd)
void	acd_network_changed_link_down (struct netif *netif)
void	acd_netif_ip_addr_changed (struct netif *netif, const ip_addr_t *old_addr, const ip_addr_t *new_addr)

Detailed Description

ACD related functions USAGE:

define LWIP_ACD 1 in your lwipopts.h Options: ACD_TMR_INTERVAL msecs, I recommend a value of 100. The value must divide 1000 with a remainder almost 0. Possible values are 1000, 500, 333, 250, 200, 166, 142, 125, 111, 100 ....

For fixed IP:

• call acd_start after selecting an IP address. The caller will be informed on conflict status via the callback function.

With AUTOIP:

• will be called from the autoip module. No extra's needed.

With DHCP:

• enable LWIP_DHCP_DOES_ACD_CHECK. Then it will be called from the dhcp module. No extra's needed.

Function Documentation

acd_add()

err_t acd_add	(	struct netif *	netif,
		struct acd *	acd,
		acd_conflict_callback_t	acd_conflict_callback )

Add ACD client to the client list and initialize callback function

Parameters

netif	network interface on which to start the acd client
acd	acd module to be added to the list
acd_conflict_callback	callback to be called when conflict information is available

acd_netif_ip_addr_changed()

void acd_netif_ip_addr_changed	(	struct netif *	netif,
		const ip_addr_t *	old_addr,
		const ip_addr_t *	new_addr )

Inform the ACD modules of address changes

Parameters

netif	network interface on which the address is changing
old_addr	old ip address
new_addr	new ip address

acd_network_changed_link_down()

void acd_network_changed_link_down

(

struct netif *

netif

)

Inform the ACD modules when the link goes down

Parameters

netif

network interface on which to inform the ACD clients

acd_remove()

void acd_remove	(	struct netif *	netif,
		struct acd *	acd )

Remove ACD client from the client list

Parameters

netif	network interface from which to remove the acd client
acd	acd module to be removed from the list

acd_start()

err_t acd_start	(	struct netif *	netif,
		struct acd *	acd,
		ip4_addr_t	ipaddr )

Start ACD client

Parameters

netif	network interface on which to start the acd client
acd	acd module to start
ipaddr	ip address to perform acd on

acd_stop()

err_t acd_stop

(

struct acd *

acd

)

Stop ACD client

Parameters

acd	acd module to stop