/** @file
  The header files of miscellaneous routines for HttpDxe driver.

Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
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.

**/

#ifndef __EFI_HTTP_PROTO_H__
#define __EFI_HTTP_PROTO_H__

#define DEF_BUF_LEN                         2048

#define HTTP_SERVICE_SIGNATURE  SIGNATURE_32('H', 't', 't', 'S')

#define HTTP_SERVICE_FROM_PROTOCOL(a) \
  CR ( \
  (a), \
  HTTP_SERVICE, \
  ServiceBinding, \
  HTTP_SERVICE_SIGNATURE \
  )


//
// The state of HTTP protocol. It starts from UNCONFIGED.
//
#define HTTP_STATE_UNCONFIGED        0
#define HTTP_STATE_HTTP_CONFIGED     1
#define HTTP_STATE_TCP_CONFIGED      2
#define HTTP_STATE_TCP_UNCONFIGED    3
#define HTTP_STATE_TCP_CONNECTED     4
#define HTTP_STATE_TCP_CLOSED        5

//
// TCP configured data.
//
#define HTTP_TOS_DEAULT              8
#define HTTP_TTL_DEAULT              255
#define HTTP_BUFFER_SIZE_DEAULT      65535
#define HTTP_MAX_SYN_BACK_LOG        5
#define HTTP_CONNECTION_TIMEOUT      60
#define HTTP_RESPONSE_TIMEOUT        5
#define HTTP_DATA_RETRIES            12
#define HTTP_FIN_TIMEOUT             2
#define HTTP_KEEP_ALIVE_PROBES       6
#define HTTP_KEEP_ALIVE_TIME         7200
#define HTTP_KEEP_ALIVE_INTERVAL     30

#define HTTP_URL_BUFFER_LEN          4096

typedef struct _HTTP_SERVICE {
  UINT32                        Signature;
  EFI_SERVICE_BINDING_PROTOCOL  ServiceBinding;
  EFI_HANDLE                    ImageHandle;
  EFI_HANDLE                    ControllerHandle;
  EFI_HANDLE                    Tcp4ChildHandle;
  EFI_HANDLE                    Tcp6ChildHandle;
  LIST_ENTRY                    ChildrenList;
  UINTN                         ChildrenNumber;
  INTN                          State;
} HTTP_SERVICE;

typedef struct {
  EFI_TCP4_IO_TOKEN             Tx4Token;
  EFI_TCP4_TRANSMIT_DATA        Tx4Data;
  EFI_TCP6_IO_TOKEN             Tx6Token;
  EFI_TCP6_TRANSMIT_DATA        Tx6Data;
  EFI_TCP4_IO_TOKEN             Rx4Token;
  EFI_TCP4_RECEIVE_DATA         Rx4Data;
  EFI_TCP6_IO_TOKEN             Rx6Token;
  EFI_TCP6_RECEIVE_DATA         Rx6Data;
  BOOLEAN                       IsTxDone;
  BOOLEAN                       IsRxDone;
  UINTN                         BodyLen;
  EFI_HTTP_METHOD               Method;
} HTTP_TCP_TOKEN_WRAP;

typedef struct {
  EFI_TLS_VERSION               Version;
  EFI_TLS_CONNECTION_END        ConnectionEnd;
  EFI_TLS_VERIFY                VerifyMethod;
  EFI_TLS_SESSION_STATE         SessionState;
} TLS_CONFIG_DATA;

typedef struct _HTTP_PROTOCOL {
  UINT32                        Signature;
  EFI_HTTP_PROTOCOL             Http;
  EFI_HANDLE                    Handle;
  HTTP_SERVICE                  *Service;
  LIST_ENTRY                    Link;   // Link to all HTTP instance from the service.
  BOOLEAN                       InDestroy;
  INTN                          State;
  EFI_HTTP_METHOD               Method;

  UINTN                         StatusCode;

  EFI_EVENT                     TimeoutEvent;

  EFI_HANDLE                    Tcp4ChildHandle;
  EFI_TCP4_PROTOCOL             *Tcp4;
  EFI_TCP4_CONFIG_DATA          Tcp4CfgData;
  EFI_TCP4_OPTION               Tcp4Option;

  EFI_TCP4_CONNECTION_TOKEN     Tcp4ConnToken;
  BOOLEAN                       IsTcp4ConnDone;
  EFI_TCP4_CLOSE_TOKEN          Tcp4CloseToken;
  BOOLEAN                       IsTcp4CloseDone;
  CHAR8                         *RemoteHost;
  UINT16                        RemotePort;
  EFI_IPv4_ADDRESS              RemoteAddr;
  
  EFI_HANDLE                    Tcp6ChildHandle;
  EFI_TCP6_PROTOCOL             *Tcp6;
  EFI_TCP6_CONFIG_DATA          Tcp6CfgData;
  EFI_TCP6_OPTION               Tcp6Option;
  
  EFI_TCP6_CONNECTION_TOKEN     Tcp6ConnToken;
  BOOLEAN                       IsTcp6ConnDone;
  EFI_TCP6_CLOSE_TOKEN          Tcp6CloseToken;
  BOOLEAN                       IsTcp6CloseDone;
  EFI_IPv6_ADDRESS              RemoteIpv6Addr;
 
  //
  // Rx4Token or Rx6Token used for receiving HTTP header.
  //
  EFI_TCP4_IO_TOKEN             Rx4Token;
  EFI_TCP4_RECEIVE_DATA         Rx4Data;
  EFI_TCP6_IO_TOKEN             Rx6Token;
  EFI_TCP6_RECEIVE_DATA         Rx6Data;
  BOOLEAN                       IsRxDone;

  CHAR8                         **EndofHeader;
  CHAR8                         **HttpHeaders;
  CHAR8                         *CacheBody;
  CHAR8                         *NextMsg;
  UINTN                         CacheLen;
  UINTN                         CacheOffset;

  //
  // HTTP message-body parser.
  //
  VOID                          *MsgParser;
  
  EFI_HTTP_VERSION              HttpVersion;
  UINT32                        TimeOutMillisec;
  BOOLEAN                       LocalAddressIsIPv6;

  EFI_HTTPv4_ACCESS_POINT       IPv4Node;
  EFI_HTTPv6_ACCESS_POINT       Ipv6Node;

  NET_MAP                       TxTokens;
  NET_MAP                       RxTokens;

  CHAR8                         *Url;

  //
  // Https Support
  //
  BOOLEAN                          UseHttps;
  
  EFI_HANDLE                       TlsChildHandle; /// Tls ChildHandle
  TLS_CONFIG_DATA                  TlsConfigData;
  EFI_TLS_PROTOCOL                 *Tls;
  EFI_TLS_CONFIGURATION_PROTOCOL   *TlsConfiguration;
  EFI_TLS_SESSION_STATE            TlsSessionState;

  //
  // TlsTxData used for transmitting TLS related messages.
  //
  EFI_TCP4_IO_TOKEN                Tcp4TlsTxToken;
  EFI_TCP4_TRANSMIT_DATA           Tcp4TlsTxData;
  EFI_TCP6_IO_TOKEN                Tcp6TlsTxToken;
  EFI_TCP6_TRANSMIT_DATA           Tcp6TlsTxData;
  BOOLEAN                          TlsIsTxDone;

  //
  // TlsRxData used for receiving TLS related messages.
  //
  EFI_TCP4_IO_TOKEN                Tcp4TlsRxToken;
  EFI_TCP4_RECEIVE_DATA            Tcp4TlsRxData;
  EFI_TCP6_IO_TOKEN                Tcp6TlsRxToken;
  EFI_TCP6_RECEIVE_DATA            Tcp6TlsRxData;
  BOOLEAN                          TlsIsRxDone;
} HTTP_PROTOCOL;

typedef struct {
  EFI_HTTP_TOKEN                *HttpToken;
  HTTP_PROTOCOL                 *HttpInstance;
  HTTP_TCP_TOKEN_WRAP           TcpWrap;
} HTTP_TOKEN_WRAP;


#define HTTP_PROTOCOL_SIGNATURE  SIGNATURE_32('H', 't', 't', 'P')

#define HTTP_INSTANCE_FROM_PROTOCOL(a) \
  CR ( \
  (a), \
  HTTP_PROTOCOL, \
  Http, \
  HTTP_PROTOCOL_SIGNATURE \
  )

/**
  The common notify function used in HTTP driver. 

  @param[in]  Event   The event signaled.
  @param[in]  Context The context.

**/
VOID
EFIAPI
HttpCommonNotify (
  IN EFI_EVENT  Event,
  IN VOID       *Context
  );

/**
  Create events for the TCP connection token and TCP close token.

  @param[in]  HttpInstance       Pointer to HTTP_PROTOCOL structure.

  @retval EFI_SUCCESS            The events are created successfully.
  @retval others                 Other error as indicated.

**/
EFI_STATUS
HttpCreateTcpConnCloseEvent (
  IN  HTTP_PROTOCOL        *HttpInstance
  );

/**
  Close events in the TCP connection token and TCP close token.

  @param[in]  HttpInstance   Pointer to HTTP_PROTOCOL structure.

**/
VOID
HttpCloseTcpConnCloseEvent (
  IN  HTTP_PROTOCOL        *HttpInstance
  );

/**
  Create event for the TCP transmit token.

  @param[in]  Wrap               Point to HTTP token's wrap data.

  @retval EFI_SUCCESS            The events is created successfully.
  @retval others                 Other error as indicated.

**/
EFI_STATUS
HttpCreateTcpTxEvent (
  IN  HTTP_TOKEN_WRAP      *Wrap
  );

/**
  Create event for the TCP receive token which is used to receive HTTP header.

  @param[in]  HttpInstance       Pointer to HTTP_PROTOCOL structure.

  @retval EFI_SUCCESS            The events is created successfully.
  @retval others                 Other error as indicated.

**/
EFI_STATUS
HttpCreateTcpRxEventForHeader (
  IN  HTTP_PROTOCOL        *HttpInstance
  );

/**
  Create event for the TCP receive token which is used to receive HTTP body.

  @param[in]  Wrap               Point to HTTP token's wrap data.

  @retval EFI_SUCCESS            The events is created successfully.
  @retval others                 Other error as indicated.

**/
EFI_STATUS
HttpCreateTcpRxEvent (
  IN  HTTP_TOKEN_WRAP      *Wrap 
  );

/**
  Close Events for Tcp Receive Tokens for HTTP body and HTTP header.

  @param[in]  Wrap               Pointer to HTTP token's wrap data.
  
**/
VOID
HttpCloseTcpRxEvent (
  IN  HTTP_TOKEN_WRAP      *Wrap
  );

/**
  Intiialize the HTTP_PROTOCOL structure to the unconfigured state.

  @param[in, out]  HttpInstance         Pointer to HTTP_PROTOCOL structure.
  @param[in]       IpVersion            Indicate us TCP4 protocol or TCP6 protocol.

  @retval EFI_SUCCESS       HTTP_PROTOCOL structure is initialized successfully.                                          
  @retval Others            Other error as indicated.

**/
EFI_STATUS
HttpInitProtocol (
  IN OUT HTTP_PROTOCOL           *HttpInstance,
  IN     BOOLEAN                 IpVersion
  );

/**
  Clean up the HTTP child, release all the resources used by it.

  @param[in]  HttpInstance       The HTTP child to clean up.

**/
VOID
HttpCleanProtocol (
  IN  HTTP_PROTOCOL          *HttpInstance
  );

/**
  Establish TCP connection with HTTP server.

  @param[in]  HttpInstance       The HTTP instance private data.

  @retval EFI_SUCCESS            The TCP connection is established.
  @retval Others                 Other error as indicated.

**/
EFI_STATUS
HttpCreateConnection (
  IN  HTTP_PROTOCOL        *HttpInstance
  );

/**
  Close existing TCP connection.

  @param[in]  HttpInstance       The HTTP instance private data.

  @retval EFI_SUCCESS            The TCP connection is closed.
  @retval Others                 Other error as indicated.

**/
EFI_STATUS
HttpCloseConnection (
  IN  HTTP_PROTOCOL        *HttpInstance
  );

/**
  Configure TCP4 protocol child.

  @param[in]  HttpInstance       The HTTP instance private data.
  @param[in]  Wrap               The HTTP token's wrap data.

  @retval EFI_SUCCESS            The TCP4 protocol child is configured.
  @retval Others                 Other error as indicated.

**/
EFI_STATUS
HttpConfigureTcp4 (
  IN  HTTP_PROTOCOL        *HttpInstance,
  IN  HTTP_TOKEN_WRAP      *Wrap
  );

/**
  Configure TCP6 protocol child.

  @param[in]  HttpInstance       The HTTP instance private data.
  @param[in]  Wrap               The HTTP token's wrap data.

  @retval EFI_SUCCESS            The TCP6 protocol child is configured.
  @retval Others                 Other error as indicated.

**/
EFI_STATUS
HttpConfigureTcp6 (
  IN  HTTP_PROTOCOL        *HttpInstance,
  IN  HTTP_TOKEN_WRAP      *Wrap
  );

/**
  Check existing TCP connection, if in error state, recover TCP4 connection. Then, 
  connect one TLS session if required.

  @param[in]  HttpInstance       The HTTP instance private data.

  @retval EFI_SUCCESS            The TCP connection is established.
  @retval EFI_NOT_READY          TCP4 protocol child is not created or configured.
  @retval Others                 Other error as indicated.

**/
EFI_STATUS
HttpConnectTcp4 (
  IN  HTTP_PROTOCOL        *HttpInstance
  );

/**
  Check existing TCP connection, if in error state, recover TCP6 connection. Then, 
  connect one TLS session if required.

  @param[in]  HttpInstance       The HTTP instance private data.

  @retval EFI_SUCCESS            The TCP connection is established.
  @retval EFI_NOT_READY          TCP6 protocol child is not created or configured.
  @retval Others                 Other error as indicated.

**/
EFI_STATUS
HttpConnectTcp6 (
  IN  HTTP_PROTOCOL        *HttpInstance
  );

/**
  Send the HTTP or HTTPS message through TCP4 or TCP6.

  @param[in]  HttpInstance       The HTTP instance private data.
  @param[in]  Wrap               The HTTP token's wrap data.
  @param[in]  TxString           Buffer containing the HTTP message string.
  @param[in]  TxStringLen        Length of the HTTP message string in bytes.

  @retval EFI_SUCCESS            The HTTP message is queued into TCP transmit queue.
  @retval Others                 Other error as indicated.

**/
EFI_STATUS
HttpTransmitTcp (
  IN  HTTP_PROTOCOL    *HttpInstance,
  IN  HTTP_TOKEN_WRAP  *Wrap,
  IN  UINT8            *TxString,
  IN  UINTN            TxStringLen
  );

/**
  Check whether the user's token or event has already
  been enqueue on HTTP Tx or Rx Token list.

  @param[in]  Map                The container of either user's transmit or receive
                                 token.
  @param[in]  Item               Current item to check against.
  @param[in]  Context            The Token to check againist.

  @retval EFI_ACCESS_DENIED      The token or event has already been enqueued in IP
  @retval EFI_SUCCESS            The current item isn't the same token/event as the
                                 context.

**/
EFI_STATUS
EFIAPI
HttpTokenExist (
  IN NET_MAP                *Map,
  IN NET_MAP_ITEM           *Item,
  IN VOID                   *Context
  );

/**
  Check whether the HTTP message associated with TxToken or Tx6Token is already sent out.

  @param[in]  Map                The container of TxToken.
  @param[in]  Item               Current item to check against.
  @param[in]  Context            The Token to check againist.

  @retval EFI_NOT_READY          The HTTP message is still queued in the list.
  @retval EFI_SUCCESS            The HTTP message has been sent out.

**/
EFI_STATUS
EFIAPI
HttpTcpNotReady (
  IN NET_MAP                *Map,
  IN NET_MAP_ITEM           *Item,
  IN VOID                   *Context
  );

/**
  Initialize Http session.

  @param[in]  HttpInstance       The HTTP instance private data.
  @param[in]  Wrap               The HTTP token's wrap data.
  @param[in]  Configure          The Flag indicates whether need to initialize session.
  @param[in]  TlsConfigure       The Flag indicates whether it's the new Tls session.

  @retval EFI_SUCCESS            The initialization of session is done. 
  @retval Others                 Other error as indicated.

**/
EFI_STATUS
HttpInitSession (
  IN  HTTP_PROTOCOL    *HttpInstance,
  IN  HTTP_TOKEN_WRAP  *Wrap,
  IN  BOOLEAN          Configure,
  IN  BOOLEAN          TlsConfigure
  );

/**
  Transmit the HTTP or HTTPS mssage by processing the associated HTTP token.

  @param[in]  Map                The container of TxToken or Tx6Token.
  @param[in]  Item               Current item to check against.
  @param[in]  Context            The Token to check againist.

  @retval EFI_OUT_OF_RESOURCES   Failed to allocate resources.
  @retval EFI_SUCCESS            The HTTP message is queued into TCP transmit
                                 queue.

**/
EFI_STATUS
EFIAPI
HttpTcpTransmit (
  IN NET_MAP                *Map,
  IN NET_MAP_ITEM           *Item,
  IN VOID                   *Context
  );

/**
  Receive the HTTP response by processing the associated HTTP token.

  @param[in]  Map                The container of Rx4Token or Rx6Token.
  @param[in]  Item               Current item to check against.
  @param[in]  Context            The Token to check againist.

  @retval EFI_SUCCESS            The HTTP response is queued into TCP receive
                                 queue.
  @retval Others                 Other error as indicated.

**/
EFI_STATUS
EFIAPI
HttpTcpReceive (
  IN NET_MAP                *Map,
  IN NET_MAP_ITEM           *Item,
  IN VOID                   *Context
  );

/**
  Receive the HTTP header by processing the associated HTTP token.

  @param[in]       HttpInstance    The HTTP instance private data.
  @param[in, out]  SizeofHeaders   The HTTP header length.
  @param[in, out]  BufferSize      The size of buffer to cacahe the header message.
  @param[in]       Timeout         The time to wait for receiving the header packet.

  @retval EFI_SUCCESS              The HTTP header is received.                          
  @retval Others                   Other errors as indicated.

**/
EFI_STATUS
HttpTcpReceiveHeader (
  IN  HTTP_PROTOCOL         *HttpInstance,
  IN  OUT UINTN             *SizeofHeaders,
  IN  OUT UINTN             *BufferSize,
  IN  EFI_EVENT             Timeout
  );

/**
  Receive the HTTP body by processing the associated HTTP token.

  @param[in]  Wrap               The HTTP token's wrap data.
  @param[in]  HttpMsg            The HTTP message data.

  @retval EFI_SUCCESS            The HTTP body is received.                          
  @retval Others                 Other error as indicated.

**/
EFI_STATUS
HttpTcpReceiveBody (
  IN  HTTP_TOKEN_WRAP       *Wrap,
  IN  EFI_HTTP_MESSAGE      *HttpMsg
  );

/**
  Clean up Tcp Tokens while the Tcp transmission error occurs.

  @param[in]  Wrap               Pointer to HTTP token's wrap data.
  
**/
VOID
HttpTcpTokenCleanup (
  IN  HTTP_TOKEN_WRAP      *Wrap
  );

/**
  The work function of EfiHttpResponse().

  @param[in]  Wrap                Pointer to HTTP token's wrap data.

  @retval EFI_SUCCESS             Allocation succeeded.
  @retval EFI_OUT_OF_RESOURCES    Failed to complete the opration due to lack of resources.
  @retval EFI_NOT_READY           Can't find a corresponding TxToken.

**/
EFI_STATUS
HttpResponseWorker (
  IN  HTTP_TOKEN_WRAP           *Wrap
  );

#endif