Intel Extensible Firmware Interface Specification page 270

Extensible Firmware Interface Specification
Status Codes Returned
EFI_SUCCESS
EFI_NOT_STARTED
EFI_INVALID_PARAMETER
EFI_DEVICE_ERROR
EFI_OUT_OF_RESOURCES
EFI_ABORTED
EFI_TIMEOUT
EFI_ICMP_ERROR
EFI_NO_RESPONSE
252
Valid DHCP has completed.
The PXE Base Code Protocol is in the stopped state.
One of the parameters is not valid.
The network device encountered an error during this operation.
Could not allocate enough memory to complete the DHCP Protocol.
The callback function aborted the DHCP Protocol.
The DHCP Protocol timed out.
The DHCP Protocol generated an ICMP error.
Valid PXE offer was not received.
12/12/00 Version 1.02