#include "lwip/opt.h"
#include "lwip/netif.h"
#include "lwip/udp.h"

Macros
#define	DHCP_COARSE_TIMER_SECS 60

#define	DHCP_COARSE_TIMER_MSECS (DHCP_COARSE_TIMER_SECS * 1000UL)

#define	DHCP_FINE_TIMER_MSECS 500

#define	dhcp_remove_struct(netif) do { (netif)->dhcp = NULL; } while(0)

Functions
void	dhcp_set_struct (struct netif netif, struct dhcp dhcp)

void	dhcp_cleanup (struct netif *netif)

err_t	dhcp_start (struct netif *netif)

err_t	dhcp_renew (struct netif *netif)

err_t	dhcp_release (struct netif *netif)

void	dhcp_stop (struct netif *netif)

void	dhcp_inform (struct netif *netif)

void	dhcp_network_changed (struct netif *netif)

void	dhcp_arp_reply (struct netif netif, const ip4_addr_t addr)

u8_t	dhcp_supplied_address (const struct netif *netif)

void	dhcp_coarse_tmr (void)

void	dhcp_fine_tmr (void)

Detailed Description

DHCP client API

Macro Definition Documentation

◆ DHCP_COARSE_TIMER_MSECS

#define DHCP_COARSE_TIMER_MSECS (DHCP_COARSE_TIMER_SECS * 1000UL)

period (in milliseconds) of the application calling dhcp_coarse_tmr()

◆ DHCP_COARSE_TIMER_SECS

#define DHCP_COARSE_TIMER_SECS 60

period (in seconds) of the application calling dhcp_coarse_tmr()

◆ DHCP_FINE_TIMER_MSECS

#define DHCP_FINE_TIMER_MSECS 500

period (in milliseconds) of the application calling dhcp_fine_tmr()

◆ dhcp_remove_struct

#define dhcp_remove_struct ( netif ) do { (netif)->dhcp = NULL; } while(0)

Remove a struct dhcp previously set to the netif using dhcp_set_struct()

Function Documentation

◆ dhcp_arp_reply()

void dhcp_arp_reply	(	struct netif *	netif,
		const ip4_addr_t *	addr
	)

Match an ARP reply with the offered IP address: check whether the offered IP address is not in use using ARP

Parameters

netif	the network interface on which the reply was received
addr	The IP address we received a reply from

◆ dhcp_coarse_tmr()

void dhcp_coarse_tmr ( void )

The DHCP timer that checks for lease renewal/rebind timeouts. Must be called once a minute (see DHCP_COARSE_TIMER_SECS).

◆ dhcp_fine_tmr()

void dhcp_fine_tmr ( void )

DHCP transaction timeout handling (this function must be called every 500ms, see DHCP_FINE_TIMER_MSECS).

A DHCP server is expected to respond within a short period of time. This timer checks whether an outstanding DHCP request is timed out.

◆ dhcp_network_changed()

void dhcp_network_changed ( struct netif * netif )

Handle a possible change in the network configuration.

This enters the REBOOTING state to verify that the currently bound address is still valid.

◆ dhcp_supplied_address()

u8_t dhcp_supplied_address ( const struct netif * netif )

check if DHCP supplied netif->ip_addr