DHCPv4
[IPv4]

Removes a struct dhcp from a netif.

ATTENTION: Only use this when not using dhcp_set_struct() to allocate the struct dhcp since the memory is passed back to the heap.

Parameters:

netif

the netif from which to remove the struct dhcp

Definition at line 683 of file lwip_dhcp.c.

Inform a DHCP server of our manual configuration.

inform server of our manual IP address

This informs DHCP servers of our fixed IP address configuration by sending an INFORM message. It does not involve DHCP address configuration, it is just here to be nice to the network.

Parameters:

netif

The lwIP network interface

Definition at line 788 of file lwip_dhcp.c.

Release a DHCP lease.

release the DHCP lease, usually called before dhcp_stop()

Parameters:

netif

network interface which must release its lease

Definition at line 1261 of file lwip_dhcp.c.

Renew an existing DHCP lease at the involved DHCP server.

enforce early lease renewal (not needed normally)

Parameters:

netif

network interface which must renew its lease

Definition at line 1108 of file lwip_dhcp.c.

Set a statically allocated struct dhcp to work with.

Using this prevents dhcp_start to allocate it using mem_malloc.

Parameters:

netif	the netif for which to set the struct dhcp
dhcp	(uninitialised) dhcp struct allocated by the application

Definition at line 662 of file lwip_dhcp.c.

Start DHCP negotiation for a network interface.

start DHCP configuration

If no DHCP client instance was attached to this interface, a new client is created first. If a DHCP client instance was already present, it restarts negotiation.

Parameters:

netif

The lwIP network interface

Returns:

lwIP error code

• ERR_OK - No error
• ERR_MEM - Out of memory

Definition at line 707 of file lwip_dhcp.c.

Remove the DHCP client from the interface.

stop DHCP configuration

Parameters:

netif

The network interface to stop DHCP on

Definition at line 1324 of file lwip_dhcp.c.