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audk/NetworkPkg/IScsiDxe/IScsiDhcp6.c

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/** @file
iSCSI DHCP6 related configuration routines.
Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "IScsiImpl.h"
/**
Extract the Root Path option and get the required target information from
Boot File Uniform Resource Locator (URL) Option.
@param[in] RootPath The RootPath string.
@param[in] Length Length of the RootPath option payload.
@param[in, out] ConfigData The iSCSI session configuration data read from
nonvolatile device.
@retval EFI_SUCCESS All required information is extracted from the
RootPath option.
@retval EFI_NOT_FOUND The RootPath is not an iSCSI RootPath.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
@retval EFI_INVALID_PARAMETER The RootPath is malformatted.
**/
EFI_STATUS
IScsiDhcp6ExtractRootPath (
IN CHAR8 *RootPath,
IN UINT16 Length,
IN OUT ISCSI_ATTEMPT_CONFIG_NVDATA *ConfigData
)
{
EFI_STATUS Status;
UINT16 IScsiRootPathIdLen;
CHAR8 *TmpStr;
ISCSI_ROOT_PATH_FIELD Fields[RP_FIELD_IDX_MAX];
ISCSI_ROOT_PATH_FIELD *Field;
UINT32 FieldIndex;
UINT8 Index;
ISCSI_SESSION_CONFIG_NVDATA *ConfigNvData;
EFI_IP_ADDRESS Ip;
UINT8 IpMode;
ConfigNvData = &ConfigData->SessionConfigData;
ConfigNvData->DnsMode = FALSE;
//
// "iscsi:"<servername>":"<protocol>":"<port>":"<LUN>":"<targetname>
//
IScsiRootPathIdLen = (UINT16) AsciiStrLen (ISCSI_ROOT_PATH_ID);
if ((Length <= IScsiRootPathIdLen) ||
(CompareMem (RootPath, ISCSI_ROOT_PATH_ID, IScsiRootPathIdLen) != 0)) {
return EFI_NOT_FOUND;
}
//
// Skip the iSCSI RootPath ID "iscsi:".
//
RootPath = RootPath + IScsiRootPathIdLen;
Length = (UINT16) (Length - IScsiRootPathIdLen);
TmpStr = (CHAR8 *) AllocatePool (Length + 1);
if (TmpStr == NULL) {
return EFI_OUT_OF_RESOURCES;
}
CopyMem (TmpStr, RootPath, Length);
TmpStr[Length] = '\0';
Index = 0;
FieldIndex = 0;
ZeroMem (&Fields[0], sizeof (Fields));
//
// Extract SERVERNAME field in the Root Path option.
//
if (TmpStr[Index] != ISCSI_ROOT_PATH_ADDR_START_DELIMITER) {
//
// The servername is expressed as domain name.
//
ConfigNvData->DnsMode = TRUE;
} else {
Index++;
}
Fields[RP_FIELD_IDX_SERVERNAME].Str = &TmpStr[Index];
if (!ConfigNvData->DnsMode) {
while ((TmpStr[Index] != ISCSI_ROOT_PATH_ADDR_END_DELIMITER)&& (Index < Length)) {
Index++;
}
//
// Skip ']' and ':'.
//
TmpStr[Index] = '\0';
Index += 2;
} else {
while ((TmpStr[Index] != ISCSI_ROOT_PATH_FIELD_DELIMITER) && (Index < Length)) {
Index++;
}
//
// Skip ':'.
//
TmpStr[Index] = '\0';
Index += 1;
}
Fields[RP_FIELD_IDX_SERVERNAME].Len = (UINT8) AsciiStrLen (Fields[RP_FIELD_IDX_SERVERNAME].Str);
//
// Extract others fields in the Root Path option string.
//
for (FieldIndex = 1; (FieldIndex < RP_FIELD_IDX_MAX) && (Index < Length); FieldIndex++) {
if (TmpStr[Index] != ISCSI_ROOT_PATH_FIELD_DELIMITER) {
Fields[FieldIndex].Str = &TmpStr[Index];
}
while ((TmpStr[Index] != ISCSI_ROOT_PATH_FIELD_DELIMITER) && (Index < Length)) {
Index++;
}
if (TmpStr[Index] == ISCSI_ROOT_PATH_FIELD_DELIMITER) {
if (FieldIndex != RP_FIELD_IDX_TARGETNAME) {
TmpStr[Index] = '\0';
Index++;
}
if (Fields[FieldIndex].Str != NULL) {
Fields[FieldIndex].Len = (UINT8) AsciiStrLen (Fields[FieldIndex].Str);
}
}
}
if (FieldIndex != RP_FIELD_IDX_MAX) {
Status = EFI_INVALID_PARAMETER;
goto ON_EXIT;
}
if ((Fields[RP_FIELD_IDX_SERVERNAME].Str == NULL) ||
(Fields[RP_FIELD_IDX_TARGETNAME].Str == NULL) ||
(Fields[RP_FIELD_IDX_PROTOCOL].Len > 1)
) {
Status = EFI_INVALID_PARAMETER;
goto ON_EXIT;
}
//
// Get the IP address of the target.
//
Field = &Fields[RP_FIELD_IDX_SERVERNAME];
if (ConfigNvData->IpMode < IP_MODE_AUTOCONFIG) {
IpMode = ConfigNvData->IpMode;
} else {
IpMode = ConfigData->AutoConfigureMode;
}
//
// Server name is expressed as domain name, just save it.
//
if (ConfigNvData->DnsMode) {
if (Field->Len > sizeof (ConfigNvData->TargetUrl)) {
return EFI_INVALID_PARAMETER;
}
CopyMem (&ConfigNvData->TargetUrl, Field->Str, Field->Len);
ConfigNvData->TargetUrl[Field->Len + 1] = '\0';
} else {
ZeroMem(&ConfigNvData->TargetUrl, sizeof (ConfigNvData->TargetUrl));
Status = IScsiAsciiStrToIp (Field->Str, IpMode, &Ip);
CopyMem (&ConfigNvData->TargetIp, &Ip, sizeof (EFI_IP_ADDRESS));
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
}
//
// Check the protocol type.
//
Field = &Fields[RP_FIELD_IDX_PROTOCOL];
if ((Field->Str != NULL) && ((*(Field->Str) - '0') != EFI_IP_PROTO_TCP)) {
Status = EFI_INVALID_PARAMETER;
goto ON_EXIT;
}
//
// Get the port of the iSCSI target.
//
Field = &Fields[RP_FIELD_IDX_PORT];
if (Field->Str != NULL) {
ConfigNvData->TargetPort = (UINT16) AsciiStrDecimalToUintn (Field->Str);
} else {
ConfigNvData->TargetPort = ISCSI_WELL_KNOWN_PORT;
}
//
// Get the LUN.
//
Field = &Fields[RP_FIELD_IDX_LUN];
if (Field->Str != NULL) {
Status = IScsiAsciiStrToLun (Field->Str, ConfigNvData->BootLun);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
} else {
ZeroMem (ConfigNvData->BootLun, sizeof (ConfigNvData->BootLun));
}
//
// Get the target iSCSI Name.
//
Field = &Fields[RP_FIELD_IDX_TARGETNAME];
if (AsciiStrLen (Field->Str) > ISCSI_NAME_MAX_SIZE - 1) {
Status = EFI_INVALID_PARAMETER;
goto ON_EXIT;
}
//
// Validate the iSCSI name.
//
Status = IScsiNormalizeName (Field->Str, AsciiStrLen (Field->Str));
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
AsciiStrCpyS (ConfigNvData->TargetName, ISCSI_NAME_MAX_SIZE, Field->Str);
ON_EXIT:
FreePool (TmpStr);
return Status;
}
/**
EFI_DHCP6_INFO_CALLBACK is provided by the consumer of the EFI DHCPv6 Protocol
instance to intercept events that occurs in the DHCPv6 Information Request
exchange process.
@param[in] This Pointer to the EFI_DHCP6_PROTOCOL instance that
is used to configure this callback function.
@param[in] Context Pointer to the context that is initialized in
the EFI_DHCP6_PROTOCOL.InfoRequest().
@param[in] Packet Pointer to Reply packet that has been received.
The EFI DHCPv6 Protocol instance is responsible
for freeing the buffer.
@retval EFI_SUCCESS Tell the EFI DHCPv6 Protocol instance to finish
Information Request exchange process.
@retval EFI_NOT_READY Tell the EFI DHCPv6 Protocol instance to continue
Information Request exchange process.
@retval EFI_ABORTED Tell the EFI DHCPv6 Protocol instance to abort
the Information Request exchange process.
@retval EFI_UNSUPPORTED Tell the EFI DHCPv6 Protocol instance to finish
the Information Request exchange process because some
request information are not received.
**/
EFI_STATUS
EFIAPI
IScsiDhcp6ParseReply (
IN EFI_DHCP6_PROTOCOL *This,
IN VOID *Context,
IN EFI_DHCP6_PACKET *Packet
)
{
EFI_STATUS Status;
UINT32 Index;
UINT32 OptionCount;
EFI_DHCP6_PACKET_OPTION *BootFileOpt;
EFI_DHCP6_PACKET_OPTION **OptionList;
ISCSI_ATTEMPT_CONFIG_NVDATA *ConfigData;
UINT16 ParaLen;
OptionCount = 0;
BootFileOpt = NULL;
Status = This->Parse (This, Packet, &OptionCount, NULL);
if (Status != EFI_BUFFER_TOO_SMALL) {
return EFI_NOT_READY;
}
OptionList = AllocateZeroPool (OptionCount * sizeof (EFI_DHCP6_PACKET_OPTION *));
if (OptionList == NULL) {
return EFI_NOT_READY;
}
Status = This->Parse (This, Packet, &OptionCount, OptionList);
if (EFI_ERROR (Status)) {
Status = EFI_NOT_READY;
goto Exit;
}
ConfigData = (ISCSI_ATTEMPT_CONFIG_NVDATA *) Context;
for (Index = 0; Index < OptionCount; Index++) {
OptionList[Index]->OpCode = NTOHS (OptionList[Index]->OpCode);
OptionList[Index]->OpLen = NTOHS (OptionList[Index]->OpLen);
//
// Get DNS server addresses from this reply packet.
//
if (OptionList[Index]->OpCode == DHCP6_OPT_DNS_SERVERS) {
if (((OptionList[Index]->OpLen & 0xf) != 0) || (OptionList[Index]->OpLen == 0)) {
Status = EFI_UNSUPPORTED;
goto Exit;
}
//
// Primary DNS server address.
//
CopyMem (&ConfigData->PrimaryDns, &OptionList[Index]->Data[0], sizeof (EFI_IPv6_ADDRESS));
if (OptionList[Index]->OpLen > 16) {
//
// Secondary DNS server address
//
CopyMem (&ConfigData->SecondaryDns, &OptionList[Index]->Data[16], sizeof (EFI_IPv6_ADDRESS));
}
} else if (OptionList[Index]->OpCode == DHCP6_OPT_BOOT_FILE_URL) {
//
// The server sends this option to inform the client about an URL to a boot file.
//
BootFileOpt = OptionList[Index];
} else if (OptionList[Index]->OpCode == DHCP6_OPT_BOOT_FILE_PARAM) {
//
// The server sends this option to inform the client about DHCP6 server address.
//
if (OptionList[Index]->OpLen < 18) {
Status = EFI_UNSUPPORTED;
goto Exit;
}
//
// Check param-len 1, should be 16 bytes.
//
CopyMem (&ParaLen, &OptionList[Index]->Data[0], sizeof (UINT16));
if (NTOHS (ParaLen) != 16) {
Status = EFI_UNSUPPORTED;
goto Exit;
}
CopyMem (&ConfigData->DhcpServer, &OptionList[Index]->Data[2], sizeof (EFI_IPv6_ADDRESS));
}
}
if (BootFileOpt == NULL) {
Status = EFI_UNSUPPORTED;
goto Exit;
}
//
// Get iSCSI root path from Boot File Uniform Resource Locator (URL) Option
//
Status = IScsiDhcp6ExtractRootPath (
(CHAR8 *) BootFileOpt->Data,
BootFileOpt->OpLen,
ConfigData
);
Exit:
FreePool (OptionList);
return Status;
}
/**
Parse the DHCP ACK to get the address configuration and DNS information.
@param[in] Image The handle of the driver image.
@param[in] Controller The handle of the controller;
@param[in, out] ConfigData The attempt configuration data.
@retval EFI_SUCCESS The DNS information is got from the DHCP ACK.
@retval EFI_NO_MAPPING DHCP failed to acquire address and other
information.
@retval EFI_INVALID_PARAMETER The DHCP ACK's DNS option is malformatted.
@retval EFI_DEVICE_ERROR Some unexpected error occurred.
@retval EFI_OUT_OF_RESOURCES There is no sufficient resource to finish the
operation.
@retval EFI_NO_MEDIA There was a media error.
**/
EFI_STATUS
IScsiDoDhcp6 (
IN EFI_HANDLE Image,
IN EFI_HANDLE Controller,
IN OUT ISCSI_ATTEMPT_CONFIG_NVDATA *ConfigData
)
{
EFI_HANDLE Dhcp6Handle;
EFI_DHCP6_PROTOCOL *Dhcp6;
EFI_STATUS Status;
EFI_STATUS TimerStatus;
EFI_DHCP6_PACKET_OPTION *Oro;
EFI_DHCP6_RETRANSMISSION InfoReqReXmit;
EFI_EVENT Timer;
EFI_STATUS MediaStatus;
//
// Check media status before doing DHCP.
//
MediaStatus = EFI_SUCCESS;
NetLibDetectMediaWaitTimeout (Controller, ISCSI_CHECK_MEDIA_GET_DHCP_WAITING_TIME, &MediaStatus);
if (MediaStatus != EFI_SUCCESS) {
AsciiPrint ("\n Error: Could not detect network connection.\n");
return EFI_NO_MEDIA;
}
//
// iSCSI will only request target info from DHCPv6 server.
//
if (!ConfigData->SessionConfigData.TargetInfoFromDhcp) {
return EFI_SUCCESS;
}
Dhcp6Handle = NULL;
Dhcp6 = NULL;
Oro = NULL;
Timer = NULL;
//
// Create a DHCP6 child instance and get the protocol.
//
Status = NetLibCreateServiceChild (
Controller,
Image,
&gEfiDhcp6ServiceBindingProtocolGuid,
&Dhcp6Handle
);
if (EFI_ERROR (Status)) {
return Status;
}
Status = gBS->OpenProtocol (
Dhcp6Handle,
&gEfiDhcp6ProtocolGuid,
(VOID **) &Dhcp6,
Image,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
Oro = AllocateZeroPool (sizeof (EFI_DHCP6_PACKET_OPTION) + 5);
if (Oro == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto ON_EXIT;
}
//
// Ask the server to reply with DNS and Boot File URL options by info request.
// All members in EFI_DHCP6_PACKET_OPTION are in network order.
//
Oro->OpCode = HTONS (DHCP6_OPT_ORO);
Oro->OpLen = HTONS (2 * 3);
Oro->Data[1] = DHCP6_OPT_DNS_SERVERS;
Oro->Data[3] = DHCP6_OPT_BOOT_FILE_URL;
Oro->Data[5] = DHCP6_OPT_BOOT_FILE_PARAM;
InfoReqReXmit.Irt = 4;
InfoReqReXmit.Mrc = 1;
InfoReqReXmit.Mrt = 10;
InfoReqReXmit.Mrd = 30;
Status = Dhcp6->InfoRequest (
Dhcp6,
TRUE,
Oro,
0,
NULL,
&InfoReqReXmit,
NULL,
IScsiDhcp6ParseReply,
ConfigData
);
if (Status == EFI_NO_MAPPING) {
Status = gBS->CreateEvent (EVT_TIMER, TPL_CALLBACK, NULL, NULL, &Timer);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
Status = gBS->SetTimer (
Timer,
TimerRelative,
ISCSI_GET_MAPPING_TIMEOUT
);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
do {
TimerStatus = gBS->CheckEvent (Timer);
if (!EFI_ERROR (TimerStatus)) {
Status = Dhcp6->InfoRequest (
Dhcp6,
TRUE,
Oro,
0,
NULL,
&InfoReqReXmit,
NULL,
IScsiDhcp6ParseReply,
ConfigData
);
}
} while (TimerStatus == EFI_NOT_READY);
}
ON_EXIT:
if (Oro != NULL) {
FreePool (Oro);
}
if (Timer != NULL) {
gBS->CloseEvent (Timer);
}
if (Dhcp6 != NULL) {
gBS->CloseProtocol (
Dhcp6Handle,
&gEfiDhcp6ProtocolGuid,
Image,
Controller
);
}
NetLibDestroyServiceChild (
Controller,
Image,
&gEfiDhcp6ServiceBindingProtocolGuid,
Dhcp6Handle
);
return Status;
}
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