dhcp_option Struct Reference

#include <dhcp.h>

Data Fields

uint8_t tag

Tag.

uint8_t len

Length.

uint8_t data [0]

Option data.

Detailed Description

A DHCP option.

DHCP options consist of a mandatory tag, a length field that is mandatory for all options except DHCP_PAD and DHCP_END, and a payload.

Definition at line 468 of file dhcp.h.

Field Documentation

uint8_t dhcp_option::tag

Tag.

Must be a DHCP_XXX value.

Definition at line 473 of file dhcp.h.

Referenced by dhcp_option_len(), dhcpopt_update_len(), find_dhcp_option_with_encap(), and set_dhcp_option().

uint8_t dhcp_option::len

Length.

This is the length of the data field (i.e. excluding the tag and length fields). For the two tags DHCP_PAD and DHCP_END, the length field is implicitly zero and is also missing, i.e. these DHCP options are only a single byte in length.

Definition at line 482 of file dhcp.h.

Referenced by dhcp_option_len(), dhcpopt_fetch(), resize_dhcp_option(), and set_dhcp_option().

uint8_t dhcp_option::data[0]

Option data.

Definition at line 484 of file dhcp.h.

Referenced by dhcpopt_fetch(), and set_dhcp_option().

The documentation for this struct was generated from the following file:

include/gpxe/dhcp.h


Data Fields
uint8_t	tag
	Tag.
uint8_t	len
	Length.
uint8_t	data [0]
	Option data.