RESTART DHCP

Op-Code: PXENV_RESTART_DHCP
Input: ES:DI points to a t_PXENV_RESTART_DHCP parameter.
Output: If DHCP cannot be restarted, PXENV_EXIT_FAILURE will be returned in AX, with the CF set accordingly. The status field in the parameter structure will be set to one of the values represented by the PXENV_STATUS_xxx constants. If DHCP is restarted, control is never returned to the caller.
Description: This service will try to establish a new DHCP connection with the server and try to start a download of a new image. The image to be downloaded will be determined by the server.
Note: It is the responsibility of the caller to make sure the network connection is in a valid state before trying to restart DHCP. Any existing network connection should be closed, and the network adapter must be shutdown using the UNDI API service PXENV_UNDI_SHUTDOWN.

Service cannot be used in protected mode.