| /** @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 + 2) > 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; | |
| } | |