mirror of https://github.com/acidanthera/audk.git
814 lines
23 KiB
C
814 lines
23 KiB
C
/** @file
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Driver Binding functions and Service Binding functions
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implementation for Dhcp6 Driver.
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Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "Dhcp6Impl.h"
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EFI_DRIVER_BINDING_PROTOCOL gDhcp6DriverBinding = {
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Dhcp6DriverBindingSupported,
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Dhcp6DriverBindingStart,
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Dhcp6DriverBindingStop,
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0xa,
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NULL,
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NULL
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};
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EFI_SERVICE_BINDING_PROTOCOL gDhcp6ServiceBindingTemplate = {
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Dhcp6ServiceBindingCreateChild,
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Dhcp6ServiceBindingDestroyChild
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};
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/**
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Configure the default Udp6Io to receive all the DHCP6 traffic
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on this network interface.
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@param[in] UdpIo The pointer to Udp6Io to be configured.
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@param[in] Context The pointer to the context.
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@retval EFI_SUCCESS The Udp6Io is successfully configured.
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@retval Others Failed to configure the Udp6Io.
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**/
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EFI_STATUS
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EFIAPI
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Dhcp6ConfigureUdpIo (
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IN UDP_IO *UdpIo,
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IN VOID *Context
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)
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{
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EFI_UDP6_PROTOCOL *Udp6;
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EFI_UDP6_CONFIG_DATA *Config;
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Udp6 = UdpIo->Protocol.Udp6;
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Config = &(UdpIo->Config.Udp6);
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ZeroMem (Config, sizeof (EFI_UDP6_CONFIG_DATA));
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//
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// Set Udp6 configure data for the Dhcp6 instance.
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//
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Config->AcceptPromiscuous = FALSE;
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Config->AcceptAnyPort = FALSE;
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Config->AllowDuplicatePort = FALSE;
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Config->TrafficClass = 0;
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Config->HopLimit = 128;
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Config->ReceiveTimeout = 0;
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Config->TransmitTimeout = 0;
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//
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// Configure an endpoint of client(0, 546), server(0, 0), the addresses
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// will be overridden later. Note that we MUST not limit RemotePort.
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// More details, refer to RFC 3315 section 5.2.
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//
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Config->StationPort = DHCP6_PORT_CLIENT;
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Config->RemotePort = 0;
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return Udp6->Configure (Udp6, Config);;
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}
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/**
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Destroy the Dhcp6 service. The Dhcp6 service may be partly initialized,
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or partly destroyed. If a resource is destroyed, it is marked as such in
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case the destroy failed and being called again later.
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@param[in, out] Service The pointer to Dhcp6 service to be destroyed.
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**/
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VOID
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Dhcp6DestroyService (
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IN OUT DHCP6_SERVICE *Service
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)
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{
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//
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// All children instances should have been already destroyed here.
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//
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ASSERT (Service->NumOfChild == 0);
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if (Service->ClientId != NULL) {
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FreePool (Service->ClientId);
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}
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if (Service->UdpIo != NULL) {
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UdpIoFreeIo (Service->UdpIo);
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}
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FreePool (Service);
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}
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/**
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Create a new Dhcp6 service for the Nic controller.
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@param[in] Controller The controller to be installed DHCP6 service
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binding protocol.
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@param[in] ImageHandle The image handle of the Dhcp6 driver.
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@param[out] Service The return pointer of the new Dhcp6 service.
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@retval EFI_SUCCESS The Dhcp6 service is created successfully.
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@retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
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@retval EFI_OUT_OF_RESOURCES Failed to allocate resource.
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**/
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EFI_STATUS
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Dhcp6CreateService (
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IN EFI_HANDLE Controller,
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IN EFI_HANDLE ImageHandle,
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OUT DHCP6_SERVICE **Service
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)
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{
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DHCP6_SERVICE *Dhcp6Srv;
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EFI_STATUS Status;
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*Service = NULL;
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Dhcp6Srv = AllocateZeroPool (sizeof (DHCP6_SERVICE));
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if (Dhcp6Srv == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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//
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// Open the SNP protocol to get mode data later.
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//
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Dhcp6Srv->Snp = NULL;
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NetLibGetSnpHandle (Controller, &Dhcp6Srv->Snp);
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if (Dhcp6Srv->Snp == NULL) {
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FreePool (Dhcp6Srv);
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return EFI_DEVICE_ERROR;
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}
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//
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// Initialize the fields of the new Dhcp6 service.
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//
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Dhcp6Srv->Signature = DHCP6_SERVICE_SIGNATURE;
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Dhcp6Srv->Controller = Controller;
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Dhcp6Srv->Image = ImageHandle;
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Dhcp6Srv->Xid = (0xffffff & NET_RANDOM (NetRandomInitSeed ()));
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CopyMem (
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&Dhcp6Srv->ServiceBinding,
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&gDhcp6ServiceBindingTemplate,
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sizeof (EFI_SERVICE_BINDING_PROTOCOL)
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);
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//
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// Locate Ip6->Ip6Config and store it for get IP6 Duplicate Address Detection transmits.
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//
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Status = gBS->HandleProtocol (
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Controller,
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&gEfiIp6ConfigProtocolGuid,
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(VOID **) &Dhcp6Srv->Ip6Cfg
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);
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if (EFI_ERROR (Status)) {
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FreePool (Dhcp6Srv);
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return Status;
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}
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//
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// Generate client Duid: If SMBIOS system UUID is located, generate DUID in DUID-UUID format.
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// Otherwise, in DUID-LLT format.
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//
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Dhcp6Srv->ClientId = Dhcp6GenerateClientId (Dhcp6Srv->Snp->Mode);
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if (Dhcp6Srv->ClientId == NULL) {
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FreePool (Dhcp6Srv);
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return EFI_DEVICE_ERROR;
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}
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//
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// Create an Udp6Io for stateful transmit/receive of each Dhcp6 instance.
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//
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Dhcp6Srv->UdpIo = UdpIoCreateIo (
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Controller,
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ImageHandle,
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Dhcp6ConfigureUdpIo,
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UDP_IO_UDP6_VERSION,
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NULL
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);
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if (Dhcp6Srv->UdpIo == NULL) {
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FreePool (Dhcp6Srv->ClientId);
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FreePool (Dhcp6Srv);
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return EFI_DEVICE_ERROR;
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}
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InitializeListHead (&Dhcp6Srv->Child);
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*Service = Dhcp6Srv;
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return EFI_SUCCESS;
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}
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/**
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Destroy the Dhcp6 instance and recycle the resources.
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@param[in, out] Instance The pointer to the Dhcp6 instance.
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**/
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VOID
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Dhcp6DestroyInstance (
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IN OUT DHCP6_INSTANCE *Instance
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)
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{
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//
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// Clean up the retry list first.
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//
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Dhcp6CleanupRetry (Instance, DHCP6_PACKET_ALL);
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gBS->CloseEvent (Instance->Timer);
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//
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// Clean up the current configure data.
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//
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if (Instance->Config != NULL) {
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Dhcp6CleanupConfigData (Instance->Config);
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FreePool (Instance->Config);
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}
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//
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// Clean up the current Ia.
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//
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if (Instance->IaCb.Ia != NULL) {
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if (Instance->IaCb.Ia->ReplyPacket != NULL) {
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FreePool (Instance->IaCb.Ia->ReplyPacket);
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}
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FreePool (Instance->IaCb.Ia);
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}
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if (Instance->Unicast != NULL) {
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FreePool (Instance->Unicast);
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}
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if (Instance->AdSelect != NULL) {
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FreePool (Instance->AdSelect);
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}
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FreePool (Instance);
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}
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/**
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Create the Dhcp6 instance and initialize it.
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@param[in] Service The pointer to the Dhcp6 service.
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@param[out] Instance The pointer to the Dhcp6 instance.
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@retval EFI_SUCCESS The Dhcp6 instance is created.
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@retval EFI_OUT_OF_RESOURCES Failed to allocate resources.
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**/
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EFI_STATUS
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Dhcp6CreateInstance (
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IN DHCP6_SERVICE *Service,
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OUT DHCP6_INSTANCE **Instance
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)
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{
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EFI_STATUS Status;
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DHCP6_INSTANCE *Dhcp6Ins;
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*Instance = NULL;
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Dhcp6Ins = AllocateZeroPool (sizeof (DHCP6_INSTANCE));
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if (Dhcp6Ins == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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//
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// Initialize the fields of the new Dhcp6 instance.
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//
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Dhcp6Ins->Signature = DHCP6_INSTANCE_SIGNATURE;
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Dhcp6Ins->UdpSts = EFI_ALREADY_STARTED;
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Dhcp6Ins->Service = Service;
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Dhcp6Ins->InDestroy = FALSE;
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Dhcp6Ins->MediaPresent = TRUE;
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CopyMem (
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&Dhcp6Ins->Dhcp6,
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&gDhcp6ProtocolTemplate,
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sizeof (EFI_DHCP6_PROTOCOL)
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);
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InitializeListHead (&Dhcp6Ins->TxList);
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InitializeListHead (&Dhcp6Ins->InfList);
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//
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// There is a timer for each Dhcp6 instance, which is used to track the
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// lease time of Ia and the retransmission time of all sent packets.
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//
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Status = gBS->CreateEvent (
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EVT_NOTIFY_SIGNAL | EVT_TIMER,
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TPL_CALLBACK,
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Dhcp6OnTimerTick,
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Dhcp6Ins,
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&Dhcp6Ins->Timer
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);
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if (EFI_ERROR (Status)) {
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FreePool (Dhcp6Ins);
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return Status;
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}
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*Instance = Dhcp6Ins;
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return EFI_SUCCESS;
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}
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/**
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Callback function which provided by user to remove one node in NetDestroyLinkList process.
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@param[in] Entry The entry to be removed.
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@param[in] Context Pointer to the callback context corresponds to the Context in NetDestroyLinkList.
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@retval EFI_SUCCESS The entry has been removed successfully.
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@retval Others Fail to remove the entry.
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**/
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EFI_STATUS
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EFIAPI
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Dhcp6DestroyChildEntry (
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IN LIST_ENTRY *Entry,
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IN VOID *Context
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)
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{
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DHCP6_INSTANCE *Instance;
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EFI_SERVICE_BINDING_PROTOCOL *ServiceBinding;
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if (Entry == NULL || Context == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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Instance = NET_LIST_USER_STRUCT_S (Entry, DHCP6_INSTANCE, Link, DHCP6_INSTANCE_SIGNATURE);
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ServiceBinding = (EFI_SERVICE_BINDING_PROTOCOL *) Context;
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return ServiceBinding->DestroyChild (ServiceBinding, Instance->Handle);
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}
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/**
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Entry point of the DHCP6 driver to install various protocols.
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@param[in] ImageHandle The handle of the UEFI image file.
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@param[in] SystemTable The pointer to the EFI System Table.
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@retval EFI_SUCCESS The operation completed successfully.
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@retval Others Unexpected error occurs.
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**/
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EFI_STATUS
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EFIAPI
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Dhcp6DriverEntryPoint (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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return EfiLibInstallDriverBindingComponentName2 (
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ImageHandle,
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SystemTable,
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&gDhcp6DriverBinding,
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ImageHandle,
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&gDhcp6ComponentName,
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&gDhcp6ComponentName2
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);
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}
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/**
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Test to see if this driver supports ControllerHandle. This service
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is called by the EFI boot service ConnectController(). In
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order to make drivers as small as possible, there are a few calling
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restrictions for this service. ConnectController() must
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follow these calling restrictions. If any other agent wishes to call
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Supported() it must also follow these calling restrictions.
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@param[in] This The pointer to the driver binding protocol.
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@param[in] ControllerHandle The handle of device to be tested.
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@param[in] RemainingDevicePath Optional parameter use to pick a specific child
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device to be started.
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@retval EFI_SUCCESS This driver supports this device.
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@retval Others This driver does not support this device.
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**/
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EFI_STATUS
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EFIAPI
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Dhcp6DriverBindingSupported (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE ControllerHandle,
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IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
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)
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{
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return gBS->OpenProtocol (
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ControllerHandle,
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&gEfiUdp6ServiceBindingProtocolGuid,
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NULL,
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This->DriverBindingHandle,
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ControllerHandle,
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EFI_OPEN_PROTOCOL_TEST_PROTOCOL
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);
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}
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/**
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Start this driver on ControllerHandle. This service is called by the
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EFI boot service ConnectController(). In order to make
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drivers as small as possible, there are a few calling restrictions for
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this service. ConnectController() must follow these
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calling restrictions. If any other agent wishes to call Start() it
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must also follow these calling restrictions.
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@param[in] This The pointer to the driver binding protocol.
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@param[in] ControllerHandle The handle of device to be started.
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@param[in] RemainingDevicePath Optional parameter use to pick a specific child
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device to be started.
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@retval EFI_SUCCESS This driver is installed to ControllerHandle.
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@retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle.
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@retval other This driver does not support this device.
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**/
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EFI_STATUS
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EFIAPI
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Dhcp6DriverBindingStart (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE ControllerHandle,
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IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
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)
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{
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EFI_STATUS Status;
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DHCP6_SERVICE *Service;
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//
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// Check the Dhcp6 service whether already started.
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//
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Status = gBS->OpenProtocol (
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ControllerHandle,
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&gEfiDhcp6ServiceBindingProtocolGuid,
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NULL,
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This->DriverBindingHandle,
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ControllerHandle,
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EFI_OPEN_PROTOCOL_TEST_PROTOCOL
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);
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if (!EFI_ERROR (Status)) {
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return EFI_ALREADY_STARTED;
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}
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//
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// Create and initialize the Dhcp6 service.
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//
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Status = Dhcp6CreateService (
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ControllerHandle,
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This->DriverBindingHandle,
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&Service
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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ASSERT (Service != NULL);
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Status = gBS->InstallMultipleProtocolInterfaces (
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&ControllerHandle,
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&gEfiDhcp6ServiceBindingProtocolGuid,
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&Service->ServiceBinding,
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NULL
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);
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if (EFI_ERROR (Status)) {
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Dhcp6DestroyService (Service);
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return Status;
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}
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return EFI_SUCCESS;
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}
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/**
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Stop this driver on ControllerHandle. This service is called by the
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EFI boot service DisconnectController(). In order to
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make drivers as small as possible, there are a few calling
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restrictions for this service. DisconnectController()
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must follow these calling restrictions. If any other agent wishes
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to call Stop() it must also follow these calling restrictions.
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@param[in] This Protocol instance pointer.
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@param[in] ControllerHandle Handle of device to stop driver on
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@param[in] NumberOfChildren Number of Handles in ChildHandleBuffer. If number of
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children is zero stop the entire bus driver.
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@param[in] ChildHandleBuffer List of Child Handles to Stop.
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@retval EFI_SUCCESS This driver is removed ControllerHandle
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@retval EFI_DEVICE_ERROR An unexpected system or network error occurred.
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@retval other This driver was not removed from this device
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**/
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EFI_STATUS
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EFIAPI
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Dhcp6DriverBindingStop (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE ControllerHandle,
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IN UINTN NumberOfChildren,
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IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
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)
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{
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EFI_STATUS Status;
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EFI_HANDLE NicHandle;
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EFI_SERVICE_BINDING_PROTOCOL *ServiceBinding;
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DHCP6_SERVICE *Service;
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LIST_ENTRY *List;
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UINTN ListLength;
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//
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// Find and check the Nic handle by the controller handle.
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//
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NicHandle = NetLibGetNicHandle (ControllerHandle, &gEfiUdp6ProtocolGuid);
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if (NicHandle == NULL) {
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return EFI_SUCCESS;
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}
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Status = gBS->OpenProtocol (
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NicHandle,
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&gEfiDhcp6ServiceBindingProtocolGuid,
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(VOID **) &ServiceBinding,
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This->DriverBindingHandle,
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NicHandle,
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EFI_OPEN_PROTOCOL_GET_PROTOCOL
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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Service = DHCP6_SERVICE_FROM_THIS (ServiceBinding);
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if (!IsListEmpty (&Service->Child)) {
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//
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// Destroy all the children instances before destroy the service.
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//
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List = &Service->Child;
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Status = NetDestroyLinkList (
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List,
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Dhcp6DestroyChildEntry,
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ServiceBinding,
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&ListLength
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);
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if (EFI_ERROR (Status) || ListLength != 0) {
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Status = EFI_DEVICE_ERROR;
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}
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}
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if (NumberOfChildren == 0 && !IsListEmpty (&Service->Child)) {
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Status = EFI_DEVICE_ERROR;
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}
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if (NumberOfChildren == 0 && IsListEmpty (&Service->Child)) {
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//
|
|
// Destroy the service itself if no child instance left.
|
|
//
|
|
Status = gBS->UninstallProtocolInterface (
|
|
NicHandle,
|
|
&gEfiDhcp6ServiceBindingProtocolGuid,
|
|
ServiceBinding
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
goto ON_EXIT;
|
|
}
|
|
|
|
Dhcp6DestroyService (Service);
|
|
Status = EFI_SUCCESS;
|
|
}
|
|
|
|
ON_EXIT:
|
|
return Status;
|
|
}
|
|
|
|
|
|
/**
|
|
Creates a child handle and installs a protocol.
|
|
|
|
The CreateChild() function installs a protocol on ChildHandle.
|
|
If ChildHandle is a pointer to NULL, then a new handle is created and returned in ChildHandle.
|
|
If ChildHandle is not a pointer to NULL, then the protocol installs on the existing ChildHandle.
|
|
|
|
@param[in] This Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.
|
|
@param[in, out] ChildHandle Pointer to the handle of the child to create. If it is NULL,
|
|
then a new handle is created. If it is a pointer to an existing
|
|
UEFI handle, then the protocol is added to the existing UEFI handle.
|
|
|
|
@retval EFI_SUCCESS The protocol was added to ChildHandle.
|
|
@retval EFI_INVALID_PARAMETER ChildHandle is NULL.
|
|
@retval other The child handle was not created.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
Dhcp6ServiceBindingCreateChild (
|
|
IN EFI_SERVICE_BINDING_PROTOCOL *This,
|
|
IN OUT EFI_HANDLE *ChildHandle
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
EFI_TPL OldTpl;
|
|
DHCP6_SERVICE *Service;
|
|
DHCP6_INSTANCE *Instance;
|
|
VOID *Udp6;
|
|
|
|
if (This == NULL || ChildHandle == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
Service = DHCP6_SERVICE_FROM_THIS (This);
|
|
|
|
Status = Dhcp6CreateInstance (Service, &Instance);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
ASSERT (Instance != NULL);
|
|
|
|
//
|
|
// Start the timer when the instance is ready to use.
|
|
//
|
|
Status = gBS->SetTimer (
|
|
Instance->Timer,
|
|
TimerPeriodic,
|
|
TICKS_PER_SECOND
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
goto ON_ERROR;
|
|
}
|
|
|
|
//
|
|
// Install the DHCP6 protocol onto ChildHandle.
|
|
//
|
|
Status = gBS->InstallMultipleProtocolInterfaces (
|
|
ChildHandle,
|
|
&gEfiDhcp6ProtocolGuid,
|
|
&Instance->Dhcp6,
|
|
NULL
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
goto ON_ERROR;
|
|
}
|
|
|
|
Instance->Handle = *ChildHandle;
|
|
|
|
//
|
|
// Open the UDP6 protocol BY_CHILD.
|
|
//
|
|
Status = gBS->OpenProtocol (
|
|
Service->UdpIo->UdpHandle,
|
|
&gEfiUdp6ProtocolGuid,
|
|
(VOID **) &Udp6,
|
|
gDhcp6DriverBinding.DriverBindingHandle,
|
|
Instance->Handle,
|
|
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
|
|
gBS->UninstallMultipleProtocolInterfaces (
|
|
Instance->Handle,
|
|
&gEfiDhcp6ProtocolGuid,
|
|
&Instance->Dhcp6,
|
|
NULL
|
|
);
|
|
goto ON_ERROR;
|
|
}
|
|
|
|
//
|
|
// Add into the children list of its parent service.
|
|
//
|
|
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
|
|
|
|
InsertTailList (&Service->Child, &Instance->Link);
|
|
Service->NumOfChild++;
|
|
|
|
gBS->RestoreTPL (OldTpl);
|
|
return EFI_SUCCESS;
|
|
|
|
ON_ERROR:
|
|
|
|
Dhcp6DestroyInstance (Instance);
|
|
return Status;
|
|
}
|
|
|
|
|
|
/**
|
|
Destroys a child handle with a protocol installed on it.
|
|
|
|
The DestroyChild() function does the opposite of CreateChild(). It removes a protocol
|
|
that was installed by CreateChild() from ChildHandle. If the removed protocol is the
|
|
last protocol on ChildHandle, then ChildHandle is destroyed.
|
|
|
|
@param[in] This Pointer to the EFI_SERVICE_BINDING_PROTOCOL instance.
|
|
@param[in] ChildHandle Handle of the child to destroy
|
|
|
|
@retval EFI_SUCCESS The protocol was removed from ChildHandle.
|
|
@retval EFI_UNSUPPORTED ChildHandle does not support the protocol that is being removed.
|
|
@retval EFI_INVALID_PARAMETER Child handle is NULL.
|
|
@retval EFI_ACCESS_DENIED The protocol could not be removed from the ChildHandle
|
|
because its services are being used.
|
|
@retval other The child handle was not destroyed
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
Dhcp6ServiceBindingDestroyChild (
|
|
IN EFI_SERVICE_BINDING_PROTOCOL *This,
|
|
IN EFI_HANDLE ChildHandle
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
EFI_TPL OldTpl;
|
|
EFI_DHCP6_PROTOCOL *Dhcp6;
|
|
DHCP6_SERVICE *Service;
|
|
DHCP6_INSTANCE *Instance;
|
|
|
|
if (This == NULL || ChildHandle == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
//
|
|
// Retrieve the private context data structures
|
|
//
|
|
Status = gBS->OpenProtocol (
|
|
ChildHandle,
|
|
&gEfiDhcp6ProtocolGuid,
|
|
(VOID **) &Dhcp6,
|
|
gDhcp6DriverBinding.DriverBindingHandle,
|
|
ChildHandle,
|
|
EFI_OPEN_PROTOCOL_GET_PROTOCOL
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
Instance = DHCP6_INSTANCE_FROM_THIS (Dhcp6);
|
|
Service = DHCP6_SERVICE_FROM_THIS (This);
|
|
|
|
if (Instance->Service != Service) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (Instance->InDestroy) {
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
|
|
|
|
Instance->InDestroy = TRUE;
|
|
|
|
Status = gBS->CloseProtocol (
|
|
Service->UdpIo->UdpHandle,
|
|
&gEfiUdp6ProtocolGuid,
|
|
gDhcp6DriverBinding.DriverBindingHandle,
|
|
ChildHandle
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
Instance->InDestroy = FALSE;
|
|
gBS->RestoreTPL (OldTpl);
|
|
return Status;
|
|
}
|
|
|
|
//
|
|
// Uninstall the MTFTP6 protocol first to enable a top down destruction.
|
|
//
|
|
gBS->RestoreTPL (OldTpl);
|
|
Status = gBS->UninstallProtocolInterface (
|
|
ChildHandle,
|
|
&gEfiDhcp6ProtocolGuid,
|
|
Dhcp6
|
|
);
|
|
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
|
|
if (EFI_ERROR (Status)) {
|
|
Instance->InDestroy = FALSE;
|
|
gBS->RestoreTPL (OldTpl);
|
|
return Status;
|
|
}
|
|
|
|
//
|
|
// Remove it from the children list of its parent service.
|
|
//
|
|
RemoveEntryList (&Instance->Link);
|
|
Service->NumOfChild--;
|
|
|
|
gBS->RestoreTPL (OldTpl);
|
|
|
|
Dhcp6DestroyInstance (Instance);
|
|
return EFI_SUCCESS;
|
|
}
|