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DHCP
lwIP » Options (lwipopts.h) » IPv4

## Macros

#define | LWIP_DHCP 0
#define | LWIP_DHCP_DOES_ACD_CHECK LWIP_DHCP
#define | LWIP_DHCP_BOOTP_FILE 0
#define | LWIP_DHCP_GET_NTP_SRV 0
#define | LWIP_DHCP_MAX_NTP_SERVERS 1
#define | LWIP_DHCP_MAX_DNS_SERVERS DNS_MAX_SERVERS
#define | LWIP_DHCP_DISCOVER_ADD_HOSTNAME 1

## Detailed Description

## Macro Definition Documentation

## LWIP_DHCP

#define LWIP_DHCP 0

LWIP_DHCP==1: Enable DHCP module.

## LWIP_DHCP_BOOTP_FILE

#define LWIP_DHCP_BOOTP_FILE 0

LWIP_DHCP_BOOTP_FILE==1: Store offered_si_addr and boot_file_name.

## LWIP_DHCP_DISCOVER_ADD_HOSTNAME

#define LWIP_DHCP_DISCOVER_ADD_HOSTNAME 1

LWIP_DHCP_DISCOVER_ADD_HOSTNAME: Set to 0 to not include hostname opt in discover packets. If the hostname is not set in the DISCOVER packet, then some servers might issue an OFFER with hostname configured and consequently reject the REQUEST with any other hostname.

## LWIP_DHCP_DOES_ACD_CHECK

#define LWIP_DHCP_DOES_ACD_CHECK LWIP_DHCP

LWIP_DHCP_DOES_ACD_CHECK==1: Perform address conflict detection on the dhcp address.

## LWIP_DHCP_GET_NTP_SRV

#define LWIP_DHCP_GET_NTP_SRV 0

LWIP_DHCP_GETS_NTP==1: Request NTP servers with discover/select. For each response packet, an callback is called, which has to be provided by the port: void dhcp_set_ntp_servers(u8_t num_ntp_servers, ip_addr_t* ntp_server_addrs);

## LWIP_DHCP_MAX_DNS_SERVERS

#define LWIP_DHCP_MAX_DNS_SERVERS DNS_MAX_SERVERS

LWIP_DHCP_MAX_DNS_SERVERS > 0: Request DNS servers with discover/select. DNS servers received in the response are passed to DNS via dns_setserver() (up to the maximum limit defined here).

## LWIP_DHCP_MAX_NTP_SERVERS

#define LWIP_DHCP_MAX_NTP_SERVERS 1

The maximum of NTP servers requested