tyler.durden
/
audk
mirror of https://github.com/acidanthera/audk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
audk/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c

1264 lines
32 KiB
C
Raw Blame History

/** @file
Copyright (c) 2006 - 2007, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
Dhcp4Impl.c
Abstract:
This file implement the EFI_DHCP4_PROTOCOL interface.
**/
#include "Dhcp4Impl.h"
/**
Get the current operation parameter and lease for the network interface.
@param This The DHCP protocol instance
@param Dhcp4ModeData The variable to save the DHCP mode data.
@retval EFI_INVALID_PARAMETER The parameter is invalid
@retval EFI_SUCCESS The Dhcp4ModeData is updated with the current
operation parameter.
**/
STATIC
EFI_STATUS
EFIAPI
EfiDhcp4GetModeData (
IN EFI_DHCP4_PROTOCOL *This,
OUT EFI_DHCP4_MODE_DATA *Dhcp4ModeData
)
{
DHCP_PROTOCOL *Instance;
DHCP_SERVICE *DhcpSb;
DHCP_PARAMETER *Para;
EFI_TPL OldTpl;
IP4_ADDR Ip;
//
// First validate the parameters.
//
if ((This == NULL) || (Dhcp4ModeData == NULL)) {
return EFI_INVALID_PARAMETER;
}
Instance = DHCP_INSTANCE_FROM_THIS (This);
OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);
DhcpSb = Instance->Service;
//
// Caller can use GetModeData to retrieve current DHCP states
// no matter whether it is the active child or not.
//
Dhcp4ModeData->State = (EFI_DHCP4_STATE) DhcpSb->DhcpState;
CopyMem (&Dhcp4ModeData->ConfigData, &DhcpSb->ActiveConfig, sizeof (Dhcp4ModeData->ConfigData));
CopyMem (&Dhcp4ModeData->ClientMacAddress, &DhcpSb->Mac, sizeof (Dhcp4ModeData->ClientMacAddress));
Ip = HTONL (DhcpSb->ClientAddr);
NetCopyMem (&Dhcp4ModeData->ClientAddress, &Ip, sizeof (EFI_IPv4_ADDRESS));
Ip = HTONL (DhcpSb->Netmask);
NetCopyMem (&Dhcp4ModeData->SubnetMask, &Ip, sizeof (EFI_IPv4_ADDRESS));
Ip = HTONL (DhcpSb->ServerAddr);
NetCopyMem (&Dhcp4ModeData->ServerAddress, &Ip, sizeof (EFI_IPv4_ADDRESS));
Para = DhcpSb->Para;
if (Para != NULL) {
Ip = HTONL (Para->Router);
NetCopyMem (&Dhcp4ModeData->RouterAddress, &Ip, sizeof (EFI_IPv4_ADDRESS));
Dhcp4ModeData->LeaseTime = Para->Lease;
} else {
NetZeroMem (&Dhcp4ModeData->RouterAddress, sizeof (EFI_IPv4_ADDRESS));
Dhcp4ModeData->LeaseTime = 0xffffffff;
}
Dhcp4ModeData->ReplyPacket = DhcpSb->Selected;
NET_RESTORE_TPL (OldTpl);
return EFI_SUCCESS;
}
/**
Free the resource related to the configure parameters.
DHCP driver will make a copy of the user's configure
such as the time out value.
@param Config The DHCP configure data
@return None
**/
VOID
DhcpCleanConfigure (
IN EFI_DHCP4_CONFIG_DATA *Config
)
{
UINT32 Index;
if (Config->DiscoverTimeout != NULL) {
NetFreePool (Config->DiscoverTimeout);
}
if (Config->RequestTimeout != NULL) {
NetFreePool (Config->RequestTimeout);
}
if (Config->OptionList != NULL) {
for (Index = 0; Index < Config->OptionCount; Index++) {
if (Config->OptionList[Index] != NULL) {
NetFreePool (Config->OptionList[Index]);
}
}
NetFreePool (Config->OptionList);
}
NetZeroMem (Config, sizeof (EFI_DHCP4_CONFIG_DATA));
}
/**
Allocate memory for configure parameter such as timeout value for Dst,
then copy the configure parameter from Src to Dst.
@param Dst The destination DHCP configure data.
@param Src The source DHCP configure data.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
@retval EFI_SUCCESS The configure is copied.
**/
EFI_STATUS
DhcpCopyConfigure (
IN EFI_DHCP4_CONFIG_DATA *Dst,
IN EFI_DHCP4_CONFIG_DATA *Src
)
{
EFI_DHCP4_PACKET_OPTION **DstOptions;
EFI_DHCP4_PACKET_OPTION **SrcOptions;
INTN Len;
UINT32 Index;
CopyMem (Dst, Src, sizeof (*Dst));
Dst->DiscoverTimeout = NULL;
Dst->RequestTimeout = NULL;
Dst->OptionList = NULL;
//
// Allocate a memory then copy DiscoverTimeout to it
//
if (Src->DiscoverTimeout != NULL) {
Len = Src->DiscoverTryCount * sizeof (UINT32);
Dst->DiscoverTimeout = NetAllocatePool (Len);
if (Dst->DiscoverTimeout == NULL) {
return EFI_OUT_OF_RESOURCES;
}
for (Index = 0; Index < Src->DiscoverTryCount; Index++) {
Dst->DiscoverTimeout[Index] = MAX (Src->DiscoverTimeout[Index], 1);
}
}
//
// Allocate a memory then copy RequestTimeout to it
//
if (Src->RequestTimeout != NULL) {
Len = Src->RequestTryCount * sizeof (UINT32);
Dst->RequestTimeout = NetAllocatePool (Len);
if (Dst->RequestTimeout == NULL) {
goto ON_ERROR;
}
for (Index = 0; Index < Src->RequestTryCount; Index++) {
Dst->RequestTimeout[Index] = MAX (Src->RequestTimeout[Index], 1);
}
}
//
// Allocate an array of dhcp option point, then allocate memory
// for each option and copy the source option to it
//
if (Src->OptionList != NULL) {
Len = Src->OptionCount * sizeof (EFI_DHCP4_PACKET_OPTION *);
Dst->OptionList = NetAllocateZeroPool (Len);
if (Dst->OptionList == NULL) {
goto ON_ERROR;
}
DstOptions = Dst->OptionList;
SrcOptions = Src->OptionList;
for (Index = 0; Index < Src->OptionCount; Index++) {
Len = sizeof (EFI_DHCP4_PACKET_OPTION) + MAX (SrcOptions[Index]->Length - 1, 0);
DstOptions[Index] = NetAllocatePool (Len);
if (DstOptions[Index] == NULL) {
goto ON_ERROR;
}
NetCopyMem (DstOptions[Index], SrcOptions[Index], Len);
}
}
return EFI_SUCCESS;
ON_ERROR:
DhcpCleanConfigure (Dst);
return EFI_OUT_OF_RESOURCES;
}
/**
Give up the control of the DHCP service to let other child
resume. Don't change the service's DHCP state and the Client
address and option list configure as required by RFC2131.
@param DhcpSb The DHCP service instance.
@return None
**/
VOID
DhcpYieldControl (
IN DHCP_SERVICE *DhcpSb
)
{
EFI_DHCP4_CONFIG_DATA *Config;
Config = &DhcpSb->ActiveConfig;
DhcpSb->ServiceState = DHCP_UNCONFIGED;
DhcpSb->ActiveChild = NULL;
if (Config->DiscoverTimeout != NULL) {
NetFreePool (Config->DiscoverTimeout);
Config->DiscoverTryCount = 0;
Config->DiscoverTimeout = NULL;
}
if (Config->RequestTimeout != NULL) {
NetFreePool (Config->RequestTimeout);
Config->RequestTryCount = 0;
Config->RequestTimeout = NULL;
}
Config->Dhcp4Callback = NULL;
Config->CallbackContext = NULL;
}
/**
Configure the DHCP protocol instance and its underlying DHCP service
for operation. If Dhcp4CfgData is NULL and the child is currently
controlling the DHCP service, release the control.
@param This The DHCP protocol instance
@param Dhcp4CfgData The DHCP configure data.
@retval EFI_INVALID_PARAMETER The parameters are invalid.
@retval EFI_ACCESS_DENIED The service isn't in one of configurable states,
or there is already an active child.
@retval EFI_OUT_OF_RESOURCE Failed to allocate some resources.
@retval EFI_SUCCESS The child is configured.
**/
STATIC
EFI_STATUS
EFIAPI
EfiDhcp4Configure (
IN EFI_DHCP4_PROTOCOL *This,
IN EFI_DHCP4_CONFIG_DATA *Dhcp4CfgData OPTIONAL
)
{
EFI_DHCP4_CONFIG_DATA *Config;
DHCP_PROTOCOL *Instance;
DHCP_SERVICE *DhcpSb;
EFI_STATUS Status;
EFI_TPL OldTpl;
UINT32 Index;
IP4_ADDR Ip;
//
// First validate the parameters
//
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
if (Dhcp4CfgData != NULL) {
if (Dhcp4CfgData->DiscoverTryCount && (Dhcp4CfgData->DiscoverTimeout == NULL)) {
return EFI_INVALID_PARAMETER;
}
if (Dhcp4CfgData->RequestTryCount && (Dhcp4CfgData->RequestTimeout == NULL)) {
return EFI_INVALID_PARAMETER;
}
if (Dhcp4CfgData->OptionCount && (Dhcp4CfgData->OptionList == NULL)) {
return EFI_INVALID_PARAMETER;
}
NetCopyMem (&Ip, &Dhcp4CfgData->ClientAddress, sizeof (IP4_ADDR));
if ((Ip != 0) && !Ip4IsUnicast (NTOHL (Ip), 0)) {
return EFI_INVALID_PARAMETER;
}
}
Instance = DHCP_INSTANCE_FROM_THIS (This);
if (Instance->Signature != DHCP_PROTOCOL_SIGNATURE) {
return EFI_INVALID_PARAMETER;
}
OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);
DhcpSb = Instance->Service;
Config = &DhcpSb->ActiveConfig;
Status = EFI_ACCESS_DENIED;
if ((DhcpSb->DhcpState != Dhcp4Stopped) &&
(DhcpSb->DhcpState != Dhcp4Init) &&
(DhcpSb->DhcpState != Dhcp4InitReboot) &&
(DhcpSb->DhcpState != Dhcp4Bound)) {
goto ON_EXIT;
}
if ((DhcpSb->ActiveChild != NULL) && (DhcpSb->ActiveChild != Instance)) {
goto ON_EXIT;
}
if (Dhcp4CfgData != NULL) {
Status = EFI_OUT_OF_RESOURCES;
DhcpCleanConfigure (Config);
if (EFI_ERROR (DhcpCopyConfigure (Config, Dhcp4CfgData))) {
goto ON_EXIT;
}
DhcpSb->UserOptionLen = 0;
for (Index = 0; Index < Dhcp4CfgData->OptionCount; Index++) {
DhcpSb->UserOptionLen += Dhcp4CfgData->OptionList[Index]->Length + 2;
}
DhcpSb->ActiveChild = Instance;
if (DhcpSb->DhcpState == Dhcp4Stopped) {
DhcpSb->ClientAddr = EFI_NTOHL (Dhcp4CfgData->ClientAddress);
if (DhcpSb->ClientAddr != 0) {
DhcpSb->DhcpState = Dhcp4InitReboot;
} else {
DhcpSb->DhcpState = Dhcp4Init;
}
}
DhcpSb->ServiceState = DHCP_CONFIGED;
Status = EFI_SUCCESS;
} else if (DhcpSb->ActiveChild == Instance) {
Status = EFI_SUCCESS;
DhcpYieldControl (DhcpSb);
}
ON_EXIT:
NET_RESTORE_TPL (OldTpl);
return Status;
}
/**
Start the DHCP process.
@param This The DHCP protocol instance
@param CompletionEvent The event to signal is address is acquired.
@retval EFI_INVALID_PARAMETER The parameters are invalid.
@retval EFI_NOT_STARTED The protocol hasn't been configured.
@retval EFI_ALREADY_STARTED The DHCP process has already been started.
@retval EFI_SUCCESS The DHCP process is started.
**/
STATIC
EFI_STATUS
EFIAPI
EfiDhcp4Start (
IN EFI_DHCP4_PROTOCOL *This,
IN EFI_EVENT CompletionEvent OPTIONAL
)
{
DHCP_PROTOCOL *Instance;
DHCP_SERVICE *DhcpSb;
EFI_STATUS Status;
EFI_TPL OldTpl;
//
// First validate the parameters
//
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = DHCP_INSTANCE_FROM_THIS (This);
if (Instance->Signature != DHCP_PROTOCOL_SIGNATURE) {
return EFI_INVALID_PARAMETER;
}
OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);
DhcpSb = Instance->Service;
if (DhcpSb->DhcpState == Dhcp4Stopped) {
Status = EFI_NOT_STARTED;
goto ON_ERROR;
}
if ((DhcpSb->DhcpState != Dhcp4Init) && (DhcpSb->DhcpState != Dhcp4InitReboot)) {
Status = EFI_ALREADY_STARTED;
goto ON_ERROR;
}
DhcpSb->IoStatus = EFI_ALREADY_STARTED;
if (EFI_ERROR (Status = DhcpInitRequest (DhcpSb))) {
goto ON_ERROR;
}
//
// Start/Restart the receiving.
//
Status = UdpIoRecvDatagram (DhcpSb->UdpIo, DhcpInput, DhcpSb, 0);
if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {
goto ON_ERROR;
}
Instance->CompletionEvent = CompletionEvent;
//
// Restore the TPL now, don't call poll function at NET_TPL_LOCK.
//
NET_RESTORE_TPL (OldTpl);
if (CompletionEvent == NULL) {
while (DhcpSb->IoStatus == EFI_ALREADY_STARTED) {
DhcpSb->UdpIo->Udp->Poll (DhcpSb->UdpIo->Udp);
}
return DhcpSb->IoStatus;
}
return EFI_SUCCESS;
ON_ERROR:
NET_RESTORE_TPL (OldTpl);
return Status;
}
/**
Request an extra manual renew/rebind.
@param This The DHCP protocol instance
@param RebindRequest TRUE if request a rebind, otherwise renew it
@param CompletionEvent Event to signal when complete
@retval EFI_INVALID_PARAMETER The parameters are invalid
@retval EFI_NOT_STARTED The DHCP protocol hasn't been started.
@retval EFI_ACCESS_DENIED The DHCP protocol isn't in Bound state.
@retval EFI_SUCCESS The DHCP is renewed/rebound.
**/
STATIC
EFI_STATUS
EFIAPI
EfiDhcp4RenewRebind (
IN EFI_DHCP4_PROTOCOL *This,
IN BOOLEAN RebindRequest,
IN EFI_EVENT CompletionEvent OPTIONAL
)
{
DHCP_PROTOCOL *Instance;
DHCP_SERVICE *DhcpSb;
EFI_STATUS Status;
EFI_TPL OldTpl;
//
// First validate the parameters
//
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = DHCP_INSTANCE_FROM_THIS (This);
if (Instance->Signature != DHCP_PROTOCOL_SIGNATURE) {
return EFI_INVALID_PARAMETER;
}
OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);
DhcpSb = Instance->Service;
if (DhcpSb->DhcpState == Dhcp4Stopped) {
Status = EFI_NOT_STARTED;
goto ON_ERROR;
}
if (DhcpSb->DhcpState != Dhcp4Bound) {
Status = EFI_ACCESS_DENIED;
goto ON_ERROR;
}
if (DHCP_IS_BOOTP (DhcpSb->Para)) {
return EFI_SUCCESS;
}
//
// Transit the states then send a extra DHCP request
//
if (!RebindRequest) {
DhcpSetState (DhcpSb, Dhcp4Renewing, FALSE);
} else {
DhcpSetState (DhcpSb, Dhcp4Rebinding, FALSE);
}
Status = DhcpSendMessage (
DhcpSb,
DhcpSb->Selected,
DhcpSb->Para,
DHCP_MSG_REQUEST,
(UINT8 *) "Extra renew/rebind by the application"
);
if (EFI_ERROR (Status)) {
DhcpSetState (DhcpSb, Dhcp4Bound, FALSE);
goto ON_ERROR;
}
DhcpSb->ExtraRefresh = TRUE;
DhcpSb->IoStatus = EFI_ALREADY_STARTED;
Instance->RenewRebindEvent = CompletionEvent;
NET_RESTORE_TPL (OldTpl);
if (CompletionEvent == NULL) {
while (DhcpSb->IoStatus == EFI_ALREADY_STARTED) {
DhcpSb->UdpIo->Udp->Poll (DhcpSb->UdpIo->Udp);
}
return DhcpSb->IoStatus;
}
return EFI_SUCCESS;
ON_ERROR:
NET_RESTORE_TPL (OldTpl);
return Status;
}
/**
Release the current acquired lease.
@param This The DHCP protocol instance
@retval EFI_INVALID_PARAMETER The parameter is invalid
@retval EFI_DEVICE_ERROR Failed to transmit the DHCP release packet
@retval EFI_ACCESS_DENIED The DHCP service isn't in one of the connected
state.
@retval EFI_SUCCESS The lease is released.
**/
STATIC
EFI_STATUS
EFIAPI
EfiDhcp4Release (
IN EFI_DHCP4_PROTOCOL *This
)
{
DHCP_PROTOCOL *Instance;
DHCP_SERVICE *DhcpSb;
EFI_STATUS Status;
EFI_TPL OldTpl;
//
// First validate the parameters
//
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = DHCP_INSTANCE_FROM_THIS (This);
if (Instance->Signature != DHCP_PROTOCOL_SIGNATURE) {
return EFI_INVALID_PARAMETER;
}
Status = EFI_SUCCESS;
OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);
DhcpSb = Instance->Service;
if ((DhcpSb->DhcpState != Dhcp4InitReboot) && (DhcpSb->DhcpState != Dhcp4Bound)) {
Status = EFI_ACCESS_DENIED;
goto ON_EXIT;
}
if (!DHCP_IS_BOOTP (DhcpSb->Para) && (DhcpSb->DhcpState == Dhcp4Bound)) {
Status = DhcpSendMessage (
DhcpSb,
DhcpSb->Selected,
DhcpSb->Para,
DHCP_MSG_RELEASE,
NULL
);
if (EFI_ERROR (Status)) {
Status = EFI_DEVICE_ERROR;
goto ON_EXIT;
}
}
DhcpCleanLease (DhcpSb);
ON_EXIT:
NET_RESTORE_TPL (OldTpl);
return Status;
}
/**
Stop the current DHCP process. After this, other DHCP child
can gain control of the service, configure and use it.
@param This The DHCP protocol instance
@retval EFI_INVALID_PARAMETER The parameter is invalid.
@retval EFI_SUCCESS The DHCP process is stopped.
**/
STATIC
EFI_STATUS
EFIAPI
EfiDhcp4Stop (
IN EFI_DHCP4_PROTOCOL *This
)
{
DHCP_PROTOCOL *Instance;
DHCP_SERVICE *DhcpSb;
EFI_TPL OldTpl;
//
// First validate the parameters
//
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = DHCP_INSTANCE_FROM_THIS (This);
if (Instance->Signature != DHCP_PROTOCOL_SIGNATURE) {
return EFI_INVALID_PARAMETER;
}
OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);
DhcpSb = Instance->Service;
DhcpCleanLease (DhcpSb);
DhcpSb->DhcpState = Dhcp4Stopped;
DhcpSb->ServiceState = DHCP_UNCONFIGED;
NET_RESTORE_TPL (OldTpl);
return EFI_SUCCESS;
}
/**
Build a new DHCP packet from the seed packet. Options may be deleted or
appended. The caller should free the NewPacket when finished using it.
@param This The DHCP protocol instance.
@param SeedPacket The seed packet to start with
@param DeleteCount The number of options to delete
@param DeleteList The options to delete from the packet
@param AppendCount The number of options to append
@param AppendList The options to append to the packet
@param NewPacket The new packet, allocated and built by this
function.
@retval EFI_INVALID_PARAMETER The parameters are invalid.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory
@retval EFI_SUCCESS The packet is build.
**/
STATIC
EFI_STATUS
EFIAPI
EfiDhcp4Build (
IN EFI_DHCP4_PROTOCOL *This,
IN EFI_DHCP4_PACKET *SeedPacket,
IN UINT32 DeleteCount,
IN UINT8 *DeleteList OPTIONAL,
IN UINT32 AppendCount,
IN EFI_DHCP4_PACKET_OPTION *AppendList[] OPTIONAL,
OUT EFI_DHCP4_PACKET **NewPacket
)
{
//
// First validate the parameters
//
if ((This == NULL) || (NewPacket == NULL)) {
return EFI_INVALID_PARAMETER;
}
if ((SeedPacket == NULL) || (SeedPacket->Dhcp4.Magik != DHCP_OPTION_MAGIC) ||
EFI_ERROR (DhcpValidateOptions (SeedPacket, NULL))) {
return EFI_INVALID_PARAMETER;
}
if (((DeleteCount == 0) && (AppendCount == 0)) ||
((DeleteCount != 0) && (DeleteList == NULL)) ||
((AppendCount != 0) && (AppendList == NULL))) {
return EFI_INVALID_PARAMETER;
}
return DhcpBuild (
SeedPacket,
DeleteCount,
DeleteList,
AppendCount,
AppendList,
NewPacket
);
}
STATIC
EFI_STATUS
Dhcp4InstanceConfigUdpIo (
IN UDP_IO_PORT *UdpIo,
IN VOID *Context
)
{
DHCP_PROTOCOL *Instance;
DHCP_SERVICE *DhcpSb;
EFI_DHCP4_TRANSMIT_RECEIVE_TOKEN *Token;
EFI_UDP4_CONFIG_DATA UdpConfigData;
IP4_ADDR Ip;
Instance = (DHCP_PROTOCOL *) Context;
DhcpSb = Instance->Service;
Token = Instance->Token;
NetZeroMem (&UdpConfigData, sizeof (EFI_UDP4_CONFIG_DATA));
UdpConfigData.AcceptBroadcast = TRUE;
UdpConfigData.AllowDuplicatePort = TRUE;
UdpConfigData.TimeToLive = 64;
UdpConfigData.DoNotFragment = TRUE;
Ip = HTONL (DhcpSb->ClientAddr);
NetCopyMem (&UdpConfigData.StationAddress, &Ip, sizeof (EFI_IPv4_ADDRESS));
Ip = HTONL (DhcpSb->Netmask);
NetCopyMem (&UdpConfigData.SubnetMask, &Ip, sizeof (EFI_IPv4_ADDRESS));
if ((Token->ListenPointCount == 0) || (Token->ListenPoints[0].ListenPort == 0)) {
UdpConfigData.StationPort = DHCP_CLIENT_PORT;
} else {
UdpConfigData.StationPort = Token->ListenPoints[0].ListenPort;
}
return UdpIo->Udp->Configure (UdpIo->Udp, &UdpConfigData);
}
STATIC
EFI_STATUS
Dhcp4InstanceCreateUdpIo (
IN DHCP_PROTOCOL *Instance
)
{
DHCP_SERVICE *DhcpSb;
ASSERT (Instance->Token != NULL);
DhcpSb = Instance->Service;
Instance->UdpIo = UdpIoCreatePort (DhcpSb->Controller, DhcpSb->Image, Dhcp4InstanceConfigUdpIo, Instance);
if (Instance->UdpIo == NULL) {
return EFI_OUT_OF_RESOURCES;
} else {
return EFI_SUCCESS;
}
}
STATIC
VOID
DhcpDummyExtFree (
IN VOID *Arg
)
/*++
Routine Description:
Release the packet.
Arguments:
Arg - The packet to release
Returns:
None
--*/
{
}
VOID
PxeDhcpInput (
NET_BUF *UdpPacket,
UDP_POINTS *Points,
EFI_STATUS IoStatus,
VOID *Context
)
{
DHCP_PROTOCOL *Instance;
DHCP_SERVICE *DhcpSb;
EFI_DHCP4_HEADER *Head;
NET_BUF *Wrap;
EFI_DHCP4_PACKET *Packet;
EFI_DHCP4_TRANSMIT_RECEIVE_TOKEN *Token;
UINT32 Len;
EFI_STATUS Status;
Wrap = NULL;
Instance = (DHCP_PROTOCOL *) Context;
Token = Instance->Token;
DhcpSb = Instance->Service;
//
// Don't restart receive if error occurs or DHCP is destoried.
//
if (EFI_ERROR (IoStatus)) {
return ;
}
ASSERT (UdpPacket != NULL);
//
// Validate the packet received
//
if (UdpPacket->TotalSize < sizeof (EFI_DHCP4_HEADER)) {
goto RESTART;
}
//
// Copy the DHCP message to a continuous memory block, make the buffer size
// of the EFI_DHCP4_PACKET a multiple of 4-byte.
//
Len = NET_ROUNDUP (sizeof (EFI_DHCP4_PACKET) + UdpPacket->TotalSize - sizeof (EFI_DHCP4_HEADER), 4);
Wrap = NetbufAlloc (Len);
if (Wrap == NULL) {
goto RESTART;
}
Packet = (EFI_DHCP4_PACKET *) NetbufAllocSpace (Wrap, Len, NET_BUF_TAIL);
Packet->Size = Len;
Head = &Packet->Dhcp4.Header;
Packet->Length = NetbufCopy (UdpPacket, 0, UdpPacket->TotalSize, (UINT8 *) Head);
if (Packet->Length != UdpPacket->TotalSize) {
goto RESTART;
}
//
// Is this packet the answer to our packet?
//
if ((Head->OpCode != BOOTP_REPLY) ||
(Head->Xid != Token->Packet->Dhcp4.Header.Xid) ||
!NET_MAC_EQUAL (&DhcpSb->Mac, Head->ClientHwAddr, DhcpSb->HwLen)) {
goto RESTART;
}
//
// Validate the options and retrieve the interested options
//
if ((Packet->Length > sizeof (EFI_DHCP4_HEADER) + sizeof (UINT32)) &&
(Packet->Dhcp4.Magik == DHCP_OPTION_MAGIC) &&
EFI_ERROR (DhcpValidateOptions (Packet, NULL))) {
goto RESTART;
}
//
// Keep this packet in the ResponseQueue.
//
NET_GET_REF (Wrap);
NetbufQueAppend (&Instance->ResponseQueue, Wrap);
RESTART:
NetbufFree (UdpPacket);
if (Wrap != NULL) {
NetbufFree (Wrap);
}
Status = UdpIoRecvDatagram (Instance->UdpIo, PxeDhcpInput, Instance, 0);
if (EFI_ERROR (Status)) {
PxeDhcpDone (Instance);
}
}
VOID
PxeDhcpDone (
IN DHCP_PROTOCOL *Instance
)
{
EFI_DHCP4_TRANSMIT_RECEIVE_TOKEN *Token;
Token = Instance->Token;
Token->ResponseCount = Instance->ResponseQueue.BufNum;
if (Token->ResponseCount != 0) {
Token->ResponseList = (EFI_DHCP4_PACKET *) NetAllocatePool (Instance->ResponseQueue.BufSize);
if (Token->ResponseList == NULL) {
Token->Status = EFI_OUT_OF_RESOURCES;
goto SIGNAL_USER;
}
//
// Copy the recieved DHCP responses.
//
NetbufQueCopy (&Instance->ResponseQueue, 0, Instance->ResponseQueue.BufSize, (UINT8 *) Token->ResponseList);
Token->Status = EFI_SUCCESS;
} else {
Token->ResponseList = NULL;
Token->Status = EFI_TIMEOUT;
}
SIGNAL_USER:
//
// Clean the resources dedicated for this transmit receive transaction.
//
NetbufQueFlush (&Instance->ResponseQueue);
UdpIoCleanPort (Instance->UdpIo);
UdpIoFreePort (Instance->UdpIo);
Instance->UdpIo = NULL;
Instance->Token = NULL;
if (Token->CompletionEvent != NULL) {
gBS->SignalEvent (Token->CompletionEvent);
}
}
/**
Transmit and receive a packet through this DHCP service.
This is unsupported.
@param This The DHCP protocol instance
@param Token The transmit and receive instance
@retval EFI_UNSUPPORTED It always returns unsupported.
**/
STATIC
EFI_STATUS
EFIAPI
EfiDhcp4TransmitReceive (
IN EFI_DHCP4_PROTOCOL *This,
IN EFI_DHCP4_TRANSMIT_RECEIVE_TOKEN *Token
)
{
DHCP_PROTOCOL *Instance;
EFI_TPL OldTpl;
EFI_STATUS Status;
NET_FRAGMENT Frag;
NET_BUF *Wrap;
UDP_POINTS EndPoint;
IP4_ADDR Ip;
DHCP_SERVICE *DhcpSb;
IP4_ADDR Gateway;
IP4_ADDR SubnetMask;
if ((This == NULL) || (Token == NULL) || (Token->Packet == NULL)) {
return EFI_INVALID_PARAMETER;
}
Instance = DHCP_INSTANCE_FROM_THIS (This);
DhcpSb = Instance->Service;
if (Instance->Token != NULL) {
//
// The previous call to TransmitReceive is not finished.
//
return EFI_NOT_READY;
}
if ((Token->Packet->Dhcp4.Magik != DHCP_OPTION_MAGIC) ||
(NTOHL (Token->Packet->Dhcp4.Header.Xid) == Instance->Service->Xid) ||
(Token->TimeoutValue == 0) ||
((Token->ListenPointCount != 0) && (Token->ListenPoints == NULL)) ||
EFI_ERROR (DhcpValidateOptions (Token->Packet, NULL)) ||
EFI_IP4_EQUAL (&Token->RemoteAddress, &mZeroIp4Addr)) {
//
// The DHCP packet isn't well-formed, the Transaction ID is already used
// , the timeout value is zero, the ListenPoint is invalid,
// or the RemoteAddress is zero.
//
return EFI_INVALID_PARAMETER;
}
if (DhcpSb->ClientAddr == 0) {
return EFI_NO_MAPPING;
}
OldTpl = NET_RAISE_TPL (NET_TPL_LOCK);
//
// Save the token and the timeout value.
//
Instance->Token = Token;
Instance->Timeout = Token->TimeoutValue;
//
// Create a UDP IO for this transmit receive transaction.
//
Status = Dhcp4InstanceCreateUdpIo (Instance);
if (EFI_ERROR (Status)) {
goto ON_ERROR;
}
//
// Wrap the DHCP packet into a net buffer.
//
Frag.Bulk = (UINT8 *) &Token->Packet->Dhcp4;
Frag.Len = Token->Packet->Length;
Wrap = NetbufFromExt (&Frag, 1, 0, 0, DhcpDummyExtFree, NULL);
if (Wrap == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto ON_ERROR;
}
//
// Set the local address and local port.
//
EndPoint.LocalAddr = 0;
EndPoint.LocalPort = 0;
//
// Set the destination address and destination port.
//
NetCopyMem (&Ip, &Token->RemoteAddress, sizeof (EFI_IPv4_ADDRESS));
EndPoint.RemoteAddr = NTOHL (Ip);
if (Token->RemotePort == 0) {
EndPoint.RemotePort = DHCP_SERVER_PORT;
} else {
EndPoint.RemotePort = Token->RemotePort;
}
//
// Get the gateway.
//
SubnetMask = DhcpSb->Netmask;
Gateway = 0;
if (!IP4_NET_EQUAL (DhcpSb->ClientAddr, EndPoint.RemoteAddr, SubnetMask)) {
NetCopyMem (&Gateway, &Token->GatewayAddress, sizeof (EFI_IPv4_ADDRESS));
Gateway = NTOHL (Gateway);
}
//
// Transmit the DHCP packet.
//
Status = UdpIoSendDatagram (Instance->UdpIo, Wrap, &EndPoint, Gateway, DhcpOnPacketSent, NULL);
if (EFI_ERROR (Status)) {
NetbufFree (Wrap);
goto ON_ERROR;
}
//
// Start to receive the DHCP response.
//
Status = UdpIoRecvDatagram (Instance->UdpIo, PxeDhcpInput, Instance, 0);
if (EFI_ERROR (Status)) {
goto ON_ERROR;
}
ON_ERROR:
if (EFI_ERROR (Status) && (Instance->UdpIo != NULL)) {
UdpIoCleanPort (Instance->UdpIo);
UdpIoFreePort (Instance->UdpIo);
Instance->UdpIo = NULL;
Instance->Token = NULL;
}
NET_RESTORE_TPL (OldTpl);
if (!EFI_ERROR (Status) && (Token->CompletionEvent == NULL)) {
//
// Keep polling until timeout if no error happens and the CompletionEvent
// is NULL.
//
while (Instance->Timeout != 0) {
Instance->UdpIo->Udp->Poll (Instance->UdpIo->Udp);
}
}
return Status;
}
/**
Callback function for DhcpIterateOptions. This callback sets the
EFI_DHCP4_PACKET_OPTION array in the DHCP_PARSE_CONTEXT to point
the individual DHCP option in the packet.
@param Tag The DHCP option type
@param Len length of the DHCP option data
@param Data The DHCP option data
@param Context The context, to pass several parameters in.
@retval EFI_SUCCESS It always returns EFI_SUCCESS
**/
STATIC
EFI_STATUS
Dhcp4ParseCheckOption (
IN UINT8 Tag,
IN UINT8 Len,
IN UINT8 *Data,
IN VOID *Context
)
{
DHCP_PARSE_CONTEXT *Parse;
Parse = (DHCP_PARSE_CONTEXT *) Context;
Parse->Index++;
if (Parse->Index <= Parse->OptionCount) {
//
// Use _CR to get the memory position of EFI_DHCP4_PACKET_OPTION for
// the EFI_DHCP4_PACKET_OPTION->Data because DhcpIterateOptions only
// pass in the point to option data.
//
Parse->Option[Parse->Index - 1] = _CR (Data, EFI_DHCP4_PACKET_OPTION, Data);
}
return EFI_SUCCESS;
}
/**
Parse the DHCP options in the Packet into the PacketOptionList.
User should allocate this array of EFI_DHCP4_PACKET_OPTION points.
@param This The DHCP protocol instance
@param Packet The DHCP packet to parse
@param OptionCount On input, the size of the PacketOptionList; On
output, the actual number of options processed.
@param PacketOptionList The array of EFI_DHCP4_PACKET_OPTION points
@retval EFI_INVALID_PARAMETER The parameters are invalid.
@retval EFI_BUFFER_TOO_SMALL A bigger array of points is needed.
@retval EFI_SUCCESS The options are parsed.
**/
STATIC
EFI_STATUS
EFIAPI
EfiDhcp4Parse (
IN EFI_DHCP4_PROTOCOL *This,
IN EFI_DHCP4_PACKET *Packet,
IN OUT UINT32 *OptionCount,
OUT EFI_DHCP4_PACKET_OPTION *PacketOptionList[] OPTIONAL
)
{
DHCP_PARSE_CONTEXT Context;
EFI_STATUS Status;
//
// First validate the parameters
//
if ((This == NULL) || (Packet == NULL) || (OptionCount == NULL)) {
return EFI_INVALID_PARAMETER;
}
if ((Packet->Size < Packet->Length + 2 * sizeof (UINT32)) ||
(Packet->Dhcp4.Magik != DHCP_OPTION_MAGIC) ||
EFI_ERROR (DhcpValidateOptions (Packet, NULL))) {
return EFI_INVALID_PARAMETER;
}
if ((*OptionCount != 0) && (PacketOptionList == NULL)) {
return EFI_BUFFER_TOO_SMALL;
}
NetZeroMem (PacketOptionList, *OptionCount * sizeof (EFI_DHCP4_PACKET_OPTION *));
Context.Option = PacketOptionList;
Context.OptionCount = *OptionCount;
Context.Index = 0;
Status = DhcpIterateOptions (Packet, Dhcp4ParseCheckOption, &Context);
if (EFI_ERROR (Status)) {
return Status;
}
*OptionCount = Context.Index;
if (Context.Index > Context.OptionCount) {
return EFI_BUFFER_TOO_SMALL;
}
return EFI_SUCCESS;
}
EFI_DHCP4_PROTOCOL mDhcp4ProtocolTemplate = {
EfiDhcp4GetModeData,
EfiDhcp4Configure,
EfiDhcp4Start,
EfiDhcp4RenewRebind,
EfiDhcp4Release,
EfiDhcp4Stop,
EfiDhcp4Build,
EfiDhcp4TransmitReceive,
EfiDhcp4Parse
};
Reference in New Issue View Git Blame Copy Permalink