/** @file\r
Functions implementation related with DHCPv4 for UefiPxeBc Driver.\r
\r
- Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>\r
+ Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>\r
\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
// This is a map from the interested DHCP4 option tags' index to the tag value.\r
//\r
UINT8 mInterestedDhcp4Tags[PXEBC_DHCP4_TAG_INDEX_MAX] = {\r
- PXEBC_DHCP4_TAG_BOOTFILE_LEN,\r
- PXEBC_DHCP4_TAG_VENDOR,\r
- PXEBC_DHCP4_TAG_OVERLOAD,\r
- PXEBC_DHCP4_TAG_MSG_TYPE,\r
- PXEBC_DHCP4_TAG_SERVER_ID,\r
- PXEBC_DHCP4_TAG_CLASS_ID,\r
- PXEBC_DHCP4_TAG_BOOTFILE\r
+ DHCP4_TAG_BOOTFILE_LEN,\r
+ DHCP4_TAG_VENDOR,\r
+ DHCP4_TAG_OVERLOAD,\r
+ DHCP4_TAG_MSG_TYPE,\r
+ DHCP4_TAG_SERVER_ID,\r
+ DHCP4_TAG_VENDOR_CLASS_ID,\r
+ DHCP4_TAG_BOOTFILE\r
};\r
\r
//\r
Option = (EFI_DHCP4_PACKET_OPTION *) Buffer;\r
Offset = 0;\r
\r
- while (Offset < Length && Option->OpCode != PXEBC_DHCP4_TAG_EOP) {\r
+ while (Offset < Length && Option->OpCode != DHCP4_TAG_EOP) {\r
\r
if (Option->OpCode == OptTag) {\r
//\r
//\r
// Skip the current option to the next.\r
//\r
- if (Option->OpCode == PXEBC_DHCP4_TAG_PAD) {\r
+ if (Option->OpCode == DHCP4_TAG_PAD) {\r
Offset++;\r
} else {\r
Offset += Option->Length + 2;\r
\r
ASSERT (PxeOption != NULL);\r
\r
- while ((Offset < VendorOptionLen) && (PxeOption->OpCode != PXEBC_DHCP4_TAG_EOP)) {\r
+ while ((Offset < VendorOptionLen) && (PxeOption->OpCode != DHCP4_TAG_EOP)) {\r
//\r
// Parse all the interesting PXE vendor options one by one.\r
//\r
//\r
// Continue to the next option.\r
//\r
- if (PxeOption->OpCode == PXEBC_DHCP4_TAG_PAD) {\r
+ if (PxeOption->OpCode == DHCP4_TAG_PAD) {\r
Offset++;\r
} else {\r
Offset = (UINT8) (Offset + PxeOption->Length + 2);\r
//\r
// Append message type.\r
//\r
- OptList[Index]->OpCode = PXEBC_DHCP4_TAG_MSG_TYPE;\r
+ OptList[Index]->OpCode = DHCP4_TAG_MSG_TYPE;\r
OptList[Index]->Length = 1;\r
OptEnt.Mesg = (PXEBC_DHCP4_OPTION_MESG *) OptList[Index]->Data;\r
OptEnt.Mesg->Type = PXEBC_DHCP4_MSG_TYPE_REQUEST;\r
//\r
// Append max message size.\r
//\r
- OptList[Index]->OpCode = PXEBC_DHCP4_TAG_MAXMSG;\r
+ OptList[Index]->OpCode = DHCP4_TAG_MAXMSG;\r
OptList[Index]->Length = (UINT8) sizeof (PXEBC_DHCP4_OPTION_MAX_MESG_SIZE);\r
OptEnt.MaxMesgSize = (PXEBC_DHCP4_OPTION_MAX_MESG_SIZE *) OptList[Index]->Data;\r
- Value = NTOHS (PXEBC_DHCP4_PACKET_MAX_SIZE - 8);\r
+ Value = NTOHS (PXEBC_DHCP4_PACKET_MAX_SIZE);\r
CopyMem (&OptEnt.MaxMesgSize->Size, &Value, sizeof (UINT16));\r
Index++;\r
OptList[Index] = GET_NEXT_DHCP_OPTION (OptList[Index - 1]);\r
//\r
// Append parameter request list option.\r
//\r
- OptList[Index]->OpCode = PXEBC_DHCP4_TAG_PARA_LIST;\r
+ OptList[Index]->OpCode = DHCP4_TAG_PARA_LIST;\r
OptList[Index]->Length = 35;\r
OptEnt.Para = (PXEBC_DHCP4_OPTION_PARA *) OptList[Index]->Data;\r
- OptEnt.Para->ParaList[0] = PXEBC_DHCP4_TAG_NETMASK;\r
- OptEnt.Para->ParaList[1] = PXEBC_DHCP4_TAG_TIME_OFFSET;\r
- OptEnt.Para->ParaList[2] = PXEBC_DHCP4_TAG_ROUTER;\r
- OptEnt.Para->ParaList[3] = PXEBC_DHCP4_TAG_TIME_SERVER;\r
- OptEnt.Para->ParaList[4] = PXEBC_DHCP4_TAG_NAME_SERVER;\r
- OptEnt.Para->ParaList[5] = PXEBC_DHCP4_TAG_DNS_SERVER;\r
- OptEnt.Para->ParaList[6] = PXEBC_DHCP4_TAG_HOSTNAME;\r
- OptEnt.Para->ParaList[7] = PXEBC_DHCP4_TAG_BOOTFILE_LEN;\r
- OptEnt.Para->ParaList[8] = PXEBC_DHCP4_TAG_DOMAINNAME;\r
- OptEnt.Para->ParaList[9] = PXEBC_DHCP4_TAG_ROOTPATH;\r
- OptEnt.Para->ParaList[10] = PXEBC_DHCP4_TAG_EXTEND_PATH;\r
- OptEnt.Para->ParaList[11] = PXEBC_DHCP4_TAG_EMTU;\r
- OptEnt.Para->ParaList[12] = PXEBC_DHCP4_TAG_TTL;\r
- OptEnt.Para->ParaList[13] = PXEBC_DHCP4_TAG_BROADCAST;\r
- OptEnt.Para->ParaList[14] = PXEBC_DHCP4_TAG_NIS_DOMAIN;\r
- OptEnt.Para->ParaList[15] = PXEBC_DHCP4_TAG_NIS_SERVER;\r
- OptEnt.Para->ParaList[16] = PXEBC_DHCP4_TAG_NTP_SERVER;\r
- OptEnt.Para->ParaList[17] = PXEBC_DHCP4_TAG_VENDOR;\r
- OptEnt.Para->ParaList[18] = PXEBC_DHCP4_TAG_REQUEST_IP;\r
- OptEnt.Para->ParaList[19] = PXEBC_DHCP4_TAG_LEASE;\r
- OptEnt.Para->ParaList[20] = PXEBC_DHCP4_TAG_SERVER_ID;\r
- OptEnt.Para->ParaList[21] = PXEBC_DHCP4_TAG_T1;\r
- OptEnt.Para->ParaList[22] = PXEBC_DHCP4_TAG_T2;\r
- OptEnt.Para->ParaList[23] = PXEBC_DHCP4_TAG_CLASS_ID;\r
- OptEnt.Para->ParaList[24] = PXEBC_DHCP4_TAG_TFTP;\r
- OptEnt.Para->ParaList[25] = PXEBC_DHCP4_TAG_BOOTFILE;\r
- OptEnt.Para->ParaList[26] = PXEBC_PXE_DHCP4_TAG_UUID;\r
+ OptEnt.Para->ParaList[0] = DHCP4_TAG_NETMASK;\r
+ OptEnt.Para->ParaList[1] = DHCP4_TAG_TIME_OFFSET;\r
+ OptEnt.Para->ParaList[2] = DHCP4_TAG_ROUTER;\r
+ OptEnt.Para->ParaList[3] = DHCP4_TAG_TIME_SERVER;\r
+ OptEnt.Para->ParaList[4] = DHCP4_TAG_NAME_SERVER;\r
+ OptEnt.Para->ParaList[5] = DHCP4_TAG_DNS_SERVER;\r
+ OptEnt.Para->ParaList[6] = DHCP4_TAG_HOSTNAME;\r
+ OptEnt.Para->ParaList[7] = DHCP4_TAG_BOOTFILE_LEN;\r
+ OptEnt.Para->ParaList[8] = DHCP4_TAG_DOMAINNAME;\r
+ OptEnt.Para->ParaList[9] = DHCP4_TAG_ROOTPATH;\r
+ OptEnt.Para->ParaList[10] = DHCP4_TAG_EXTEND_PATH;\r
+ OptEnt.Para->ParaList[11] = DHCP4_TAG_EMTU;\r
+ OptEnt.Para->ParaList[12] = DHCP4_TAG_TTL;\r
+ OptEnt.Para->ParaList[13] = DHCP4_TAG_BROADCAST;\r
+ OptEnt.Para->ParaList[14] = DHCP4_TAG_NIS_DOMAIN;\r
+ OptEnt.Para->ParaList[15] = DHCP4_TAG_NIS_SERVER;\r
+ OptEnt.Para->ParaList[16] = DHCP4_TAG_NTP_SERVER;\r
+ OptEnt.Para->ParaList[17] = DHCP4_TAG_VENDOR;\r
+ OptEnt.Para->ParaList[18] = DHCP4_TAG_REQUEST_IP;\r
+ OptEnt.Para->ParaList[19] = DHCP4_TAG_LEASE;\r
+ OptEnt.Para->ParaList[20] = DHCP4_TAG_SERVER_ID;\r
+ OptEnt.Para->ParaList[21] = DHCP4_TAG_T1;\r
+ OptEnt.Para->ParaList[22] = DHCP4_TAG_T2;\r
+ OptEnt.Para->ParaList[23] = DHCP4_TAG_VENDOR_CLASS_ID;\r
+ OptEnt.Para->ParaList[24] = DHCP4_TAG_TFTP;\r
+ OptEnt.Para->ParaList[25] = DHCP4_TAG_BOOTFILE;\r
+ OptEnt.Para->ParaList[26] = DHCP4_TAG_UUID;\r
OptEnt.Para->ParaList[27] = 0x80;\r
OptEnt.Para->ParaList[28] = 0x81;\r
OptEnt.Para->ParaList[29] = 0x82;\r
//\r
// Append UUID/Guid-based client identifier option\r
//\r
- OptList[Index]->OpCode = PXEBC_PXE_DHCP4_TAG_UUID;\r
+ OptList[Index]->OpCode = DHCP4_TAG_UUID;\r
OptList[Index]->Length = (UINT8) sizeof (PXEBC_DHCP4_OPTION_UUID);\r
OptEnt.Uuid = (PXEBC_DHCP4_OPTION_UUID *) OptList[Index]->Data;\r
OptEnt.Uuid->Type = 0;\r
//\r
// Append client network device interface option\r
//\r
- OptList[Index]->OpCode = PXEBC_PXE_DHCP4_TAG_UNDI;\r
+ OptList[Index]->OpCode = DHCP4_TAG_UNDI;\r
OptList[Index]->Length = (UINT8) sizeof (PXEBC_DHCP4_OPTION_UNDI);\r
OptEnt.Undi = (PXEBC_DHCP4_OPTION_UNDI *) OptList[Index]->Data;\r
\r
//\r
// Append client system architecture option\r
//\r
- OptList[Index]->OpCode = PXEBC_PXE_DHCP4_TAG_ARCH;\r
+ OptList[Index]->OpCode = DHCP4_TAG_ARCH;\r
OptList[Index]->Length = (UINT8) sizeof (PXEBC_DHCP4_OPTION_ARCH);\r
OptEnt.Arch = (PXEBC_DHCP4_OPTION_ARCH *) OptList[Index]->Data;\r
Value = HTONS (EFI_PXE_CLIENT_SYSTEM_ARCHITECTURE);\r
//\r
// Append vendor class identify option\r
//\r
- OptList[Index]->OpCode = PXEBC_DHCP4_TAG_CLASS_ID;\r
+ OptList[Index]->OpCode = DHCP4_TAG_VENDOR_CLASS_ID;\r
OptList[Index]->Length = (UINT8) sizeof (PXEBC_DHCP4_OPTION_CLID);\r
OptEnt.Clid = (PXEBC_DHCP4_OPTION_CLID *) OptList[Index]->Data;\r
CopyMem (\r
CopyMem (Header->ClientHwAddr, &Mode.CurrentAddress, Header->HwAddrLen);\r
\r
Seed->Dhcp4.Magik = PXEBC_DHCP4_MAGIC;\r
- Seed->Dhcp4.Option[0] = PXEBC_DHCP4_TAG_EOP;\r
+ Seed->Dhcp4.Option[0] = DHCP4_TAG_EOP;\r
}\r
\r
\r
BOOLEAN IsProxyOffer;\r
BOOLEAN IsPxeOffer;\r
UINT8 *Ptr8;\r
+ BOOLEAN FileFieldOverloaded;\r
\r
IsProxyOffer = FALSE;\r
IsPxeOffer = FALSE;\r
+ FileFieldOverloaded = FALSE;\r
\r
ZeroMem (Cache4->OptList, sizeof (Cache4->OptList));\r
ZeroMem (&Cache4->VendorOpt, sizeof (Cache4->VendorOpt));\r
Option = Options[PXEBC_DHCP4_TAG_INDEX_OVERLOAD];\r
if (Option != NULL) {\r
if ((Option->Data[0] & PXEBC_DHCP4_OVERLOAD_FILE) != 0) {\r
+ FileFieldOverloaded = TRUE;\r
for (Index = 0; Index < PXEBC_DHCP4_TAG_INDEX_MAX; Index++) {\r
if (Options[Index] == NULL) {\r
Options[Index] = PxeBcParseDhcp4Options (\r
}\r
\r
//\r
- // The offer with "yiaddr" is a proxy offer.\r
+ // The offer with zero "yiaddr" is a proxy offer.\r
//\r
if (Offer->Dhcp4.Header.YourAddr.Addr[0] == 0) {\r
IsProxyOffer = TRUE;\r
if (*(Ptr8 - 1) != '\0') {\r
*Ptr8 = '\0';\r
}\r
- } else if (Offer->Dhcp4.Header.BootFileName[0] != 0) {\r
+ } else if (!FileFieldOverloaded && Offer->Dhcp4.Header.BootFileName[0] != 0) {\r
//\r
// If the bootfile is not present and bootfilename is present in DHCPv4 packet, just parse it.\r
// Do not count dhcp option header here, or else will destroy the serverhostname.\r
MaxMsgSize = PxeBcParseDhcp4Options (\r
Packet->Dhcp4.Option,\r
GET_OPTION_BUFFER_LEN (Packet),\r
- PXEBC_DHCP4_TAG_MAXMSG\r
+ DHCP4_TAG_MAXMSG\r
);\r
if (MaxMsgSize != NULL) {\r
- Value = HTONS (PXEBC_DHCP4_PACKET_MAX_SIZE - 8);\r
+ Value = HTONS (PXEBC_DHCP4_PACKET_MAX_SIZE);\r
CopyMem (MaxMsgSize->Data, &Value, sizeof (Value));\r
}\r
\r
switch (Dhcp4Event) {\r
\r
case Dhcp4SendDiscover:\r
+ if (Packet->Length > PXEBC_DHCP4_PACKET_MAX_SIZE) {\r
+ //\r
+ // If the to be sent packet exceeds the maximum length, abort the DHCP process.\r
+ //\r
+ Status = EFI_ABORTED;\r
+ break;\r
+ }\r
+\r
//\r
// Cache the DHCPv4 discover packet to mode data directly.\r
// It need to check SendGuid as well as Dhcp4SendRequest.\r
CopyMem (&Mode->DhcpDiscover.Dhcpv4, &Packet->Dhcp4, Packet->Length);\r
\r
case Dhcp4SendRequest:\r
+ if (Packet->Length > PXEBC_DHCP4_PACKET_MAX_SIZE) {\r
+ //\r
+ // If the to be sent packet exceeds the maximum length, abort the DHCP process.\r
+ //\r
+ Status = EFI_ABORTED;\r
+ break;\r
+ }\r
+ \r
if (Mode->SendGUID) {\r
//\r
// Send the system Guid instead of the MAC address as the hardware address if required.\r
\r
case Dhcp4RcvdOffer:\r
Status = EFI_NOT_READY;\r
+ if (Packet->Length > PXEBC_DHCP4_PACKET_MAX_SIZE) {\r
+ //\r
+ // Ignore the incoming packets which exceed the maximum length.\r
+ //\r
+ break;\r
+ }\r
if (Private->OfferNum < PXEBC_OFFER_MAX_NUM) {\r
//\r
// Cache the DHCPv4 offers to OfferBuffer[] for select later, and record\r
break;\r
\r
case Dhcp4RcvdAck:\r
+ if (Packet->Length > PXEBC_DHCP4_PACKET_MAX_SIZE) {\r
+ //\r
+ // Abort the DHCP if the ACK packet exceeds the maximum length.\r
+ //\r
+ Status = EFI_ABORTED;\r
+ break;\r
+ }\r
+\r
//\r
// Cache the DHCPv4 ack to Private->Dhcp4Ack, but it's not the final ack in mode data\r
// without verification.\r
return EFI_OUT_OF_RESOURCES;\r
}\r
\r
- OptList[OptCount]->OpCode = PXEBC_DHCP4_TAG_VENDOR;\r
+ OptList[OptCount]->OpCode = DHCP4_TAG_VENDOR;\r
OptList[OptCount]->Length = (UINT8) (VendorOptLen - 2);\r
PxeOpt = (EFI_DHCP4_PACKET_OPTION *) OptList[OptCount]->Data;\r
PxeOpt->OpCode = PXEBC_VENDOR_TAG_BOOT_ITEM;\r
PxeOpt->Length = (UINT8) sizeof (PXEBC_OPTION_BOOT_ITEM);\r
PxeBootItem = (PXEBC_OPTION_BOOT_ITEM *) PxeOpt->Data;\r
PxeBootItem->Type = HTONS (Type);\r
- PxeOpt->Data[PxeOpt->Length] = PXEBC_DHCP4_TAG_EOP;\r
+ PxeOpt->Data[PxeOpt->Length] = DHCP4_TAG_EOP;\r
\r
if (Layer != NULL) {\r
PxeBootItem->Layer = HTONS (*Layer);\r
return Status;\r
}\r
\r
+/**\r
+ Switch the Ip4 policy to static.\r
+\r
+ @param[in] Private The pointer to PXEBC_PRIVATE_DATA.\r
+\r
+ @retval EFI_SUCCESS The policy is already configured to static.\r
+ @retval Others Other error as indicated..\r
+\r
+**/\r
+EFI_STATUS\r
+PxeBcSetIp4Policy ( \r
+ IN PXEBC_PRIVATE_DATA *Private\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ EFI_IP4_CONFIG2_PROTOCOL *Ip4Config2;\r
+ EFI_IP4_CONFIG2_POLICY Policy;\r
+ UINTN DataSize;\r
+\r
+ Ip4Config2 = Private->Ip4Config2;\r
+ DataSize = sizeof (EFI_IP4_CONFIG2_POLICY);\r
+ Status = Ip4Config2->GetData (\r
+ Ip4Config2,\r
+ Ip4Config2DataTypePolicy,\r
+ &DataSize,\r
+ &Policy\r
+ );\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+ \r
+ if (Policy != Ip4Config2PolicyStatic) {\r
+ Policy = Ip4Config2PolicyStatic;\r
+ Status= Ip4Config2->SetData (\r
+ Ip4Config2,\r
+ Ip4Config2DataTypePolicy,\r
+ sizeof (EFI_IP4_CONFIG2_POLICY),\r
+ &Policy\r
+ );\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ } \r
+ }\r
+\r
+ return EFI_SUCCESS;\r
+}\r
\r
/**\r
Start the D.O.R.A DHCPv4 process to acquire the IPv4 address and other PXE boot information.\r
ZeroMem (Private->OfferIndex, sizeof (Private->OfferIndex));\r
\r
//\r
- // Start DHCPv4 D.O.R.A. process to acquire IPv4 address.\r
+ // Start DHCPv4 D.O.R.A. process to acquire IPv4 address. This may \r
+ // have already been done, thus do not leave in error if the return\r
+ // code is EFI_ALREADY_STARTED.\r
//\r
Status = Dhcp4->Start (Dhcp4, NULL);\r
- if (EFI_ERROR (Status)) {\r
+ if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {\r
if (Status == EFI_ICMP_ERROR) {\r
PxeMode->IcmpErrorReceived = TRUE;\r
}\r
CopyMem (&PxeMode->StationIp, &Private->StationIp, sizeof (EFI_IPv4_ADDRESS));\r
CopyMem (&PxeMode->SubnetMask, &Private->SubnetMask, sizeof (EFI_IPv4_ADDRESS));\r
\r
- Status = PxeBcFlushStaionIp (Private, &Private->StationIp, &Private->SubnetMask);\r
+ Status = PxeBcFlushStationIp (Private, &Private->StationIp, &Private->SubnetMask);\r
if (EFI_ERROR (Status)) {\r
goto ON_EXIT;\r
}\r
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