Fix coding style issues for Tcp4Dxe driver.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6774 6f19259b-4bc3-4df7-8a09-765794883524

13 files changed, 224 insertions, 116 deletions

diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/SockImpl.c b/MdeModulePkg/Universal/Network/Tcp4Dxe/SockImpl.c
index 3254209..602765b 100644
--- a/MdeModulePkg/Universal/Network/Tcp4Dxe/SockImpl.c
+++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/SockImpl.c
@@ -558,7 +558,7 @@ SockCreate (
 

   Parent = SockInitData->Parent;

 

-  if (Parent && (Parent->ConnCnt == Parent->BackLog)) {

+  if ((Parent != NULL) && (Parent->ConnCnt == Parent->BackLog)) {

     DEBUG (

       (EFI_D_ERROR,

       "SockCreate: Socket parent has "

@@ -744,7 +744,7 @@ SockDestroy (
   //

   // Remove it from parent connection list if needed

   //

-  if (Sock->Parent) {

+  if (Sock->Parent != NULL) {

 

     RemoveEntryList (&(Sock->ConnectionList));

     (Sock->Parent->ConnCnt)--;

@@ -982,7 +982,7 @@ SockConnClosed (
   IN SOCKET *Sock

   )

 {

-  if (Sock->CloseToken) {

+  if (Sock->CloseToken != NULL) {

     SIGNAL_TOKEN (Sock->CloseToken, EFI_SUCCESS);

     Sock->CloseToken = NULL;

   }

diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/SockInterface.c b/MdeModulePkg/Universal/Network/Tcp4Dxe/SockInterface.c
index 1c78147..a25bd4e 100644
--- a/MdeModulePkg/Universal/Network/Tcp4Dxe/SockInterface.c
+++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/SockInterface.c
@@ -205,9 +205,7 @@ SockDestroyChild (
   data ProtoData.

 

   @param  SockInitData         Inital data to setting the socket.

-  @param  ProtoData            Pointer to the protocol specific data.

-  @param  Len                  Length of the protocol specific data.

-

+  

   @return Pointer to the newly created socket. If NULL, error condition occured.

 

 **/

diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Socket.h b/MdeModulePkg/Universal/Network/Tcp4Dxe/Socket.h
index 0e98710..4ee8e6c 100644
--- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Socket.h
+++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/Socket.h
@@ -344,6 +344,14 @@ typedef struct _SOCK_INIT_DATA {
 

   EFI_HANDLE   DriverBinding; // the driver binding handle

 } SOCK_INIT_DATA;

+

+//

+//the union type of TCP and UDP protocol

+//

+typedef union {

+  EFI_TCP4_PROTOCOL TcpProtocol;

+  EFI_UDP4_PROTOCOL UdpProtocol;

+} NET_PROTOCOL;

 //

 // the socket structure representing a network service access point

 //

@@ -391,10 +399,7 @@ struct _SOCKET {
   //

   SOCK_PROTO_HANDLER    ProtoHandler; // the request handler of protocol

   UINT8 ProtoReserved[PROTO_RESERVED_LEN];  // Data fields reserved for protocol

-  union {

-    EFI_TCP4_PROTOCOL TcpProtocol;

-    EFI_UDP4_PROTOCOL UdpProtocol;

-  } NetProtocol;

+  NET_PROTOCOL          NetProtocol;

 

   //

   // Callbacks.

diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dispatcher.c b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dispatcher.c
index b2f93b4..9f17067 100644
--- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dispatcher.c
+++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Dispatcher.c
@@ -101,11 +101,11 @@ Tcp4GetMode (
     return EFI_NOT_STARTED;

   }

 

-  if (Mode->Tcp4State) {

+  if (Mode->Tcp4State != NULL) {

     *(Mode->Tcp4State) = (EFI_TCP4_CONNECTION_STATE) Tcb->State;

   }

 

-  if (Mode->Tcp4ConfigData) {

+  if (Mode->Tcp4ConfigData != NULL) {

 

     ConfigData                      = Mode->Tcp4ConfigData;

     AccessPoint                     = &(ConfigData->AccessPoint);

@@ -220,13 +220,13 @@ Tcp4Bind (
 

 

 /**

-  Flush the Tcb add its associated protocols..

+  Flush the Tcb add its associated protocols.

 

   @param  Tcb                    Pointer to the TCP_CB to be flushed.

 

-  @retval EFI_SUCCESS            The operation is completed successfully.

+  None

 

-**/

+ **/

 VOID

 Tcp4FlushPcb (

   IN TCP_CB *Tcb

@@ -329,7 +329,6 @@ Tcp4DetachPcb (
   Configure the Tcb using CfgData.

 

   @param  Sk                     Pointer to the socket of this TCP instance.

-  @param  SkTcb                  Pointer to the TCP_CB of this TCP instance.

   @param  CfgData                Pointer to the TCP configuration data.

 

   @retval EFI_SUCCESS            The operation is completed successfully.

diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Driver.c b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Driver.c
index 9d9cc69..cfdfbe6 100644
--- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Driver.c
+++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Driver.c
@@ -123,16 +123,14 @@ Tcp4CreateTimer (
 

 /**

   Stop and destroy the heartbeat timer for TCP driver.

-

-  None.

-

-  @return None.

+  

+  None

+  

+  None

 

 **/

 VOID

-Tcp4DestroyTimer (

-  VOID

-  )

+Tcp4DestroyTimer ()

 {

   ASSERT (mTcp4Timer.RefCnt > 0);

 

@@ -147,32 +145,24 @@ Tcp4DestroyTimer (
   mTcp4Timer.TimerEvent = NULL;

 }

 

+/**

+  The entry point for Tcp4 driver. 

+  Used to install Tcp4 driver on the ImageHandle.

+

+  @param  ImageHandle   The firmware allocated handle for this

+                        driver image.

+  @param  SystemTable   Pointer to the EFI system table.

+

+  @retval EFI_SUCCESS   Driver loaded.

+  @retval other         Driver not loaded.

 

+**/

 EFI_STATUS

 EFIAPI

 Tcp4DriverEntryPoint (

   IN EFI_HANDLE        ImageHandle,

   IN EFI_SYSTEM_TABLE  *SystemTable

   )

-/*++

-

-Routine Description:

-

-  The entry point for Tcp4 driver. used to install

-  Tcp4 driver on the ImageHandle.

-

-Arguments:

-

-  ImageHandle - The firmware allocated handle for this

-                driver image.

-  SystemTable - Pointer to the EFI system table.

-

-Returns:

-

-  EFI_SUCCESS - Driver loaded.

-  other       - Driver not loaded.

-

---*/

 {

   EFI_STATUS  Status;

   UINT32      Seed;

diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Input.c b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Input.c
index 8ef2432..2e43624 100644
--- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Input.c
+++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Input.c
@@ -328,7 +328,7 @@ TcpTrimSegment (
       }

     }

 

-    if (Drop) {

+    if (Drop != 0) {

       NetbufTrim (Nbuf, Drop, NET_BUF_HEAD);

     }

   }

@@ -346,7 +346,7 @@ TcpTrimSegment (
       Drop--;

     }

 

-    if (Drop) {

+    if (Drop != 0) {

       NetbufTrim (Nbuf, Drop, NET_BUF_TAIL);

     }

   }

@@ -735,7 +735,7 @@ TcpInput (
   Len     = Nbuf->TotalSize - (Head->HeadLen << 2);

 

   if ((Head->HeadLen < 5) || (Len < 0) ||

-      TcpChecksum (Nbuf, NetPseudoHeadChecksum (Src, Dst, 6, 0))) {

+      (TcpChecksum (Nbuf, NetPseudoHeadChecksum (Src, Dst, 6, 0)) != 0)) {

 

     DEBUG ((EFI_D_INFO, "TcpInput: received an mal-formated packet\n"));

     goto DISCARD;

@@ -953,7 +953,7 @@ TcpInput (
   //

   // First step: Check whether SEG.SEQ is acceptable

   //

-  if (!TcpSeqAcceptable (Tcb, Seg)) {

+  if (TcpSeqAcceptable (Tcb, Seg) == 0) {

     DEBUG ((EFI_D_WARN, "TcpInput: sequence acceptance"

       " test failed for segment of TCB %p\n", Tcb));

 

@@ -1371,13 +1371,13 @@ StepSix:
   // Tcb is a new child of the listening Parent,

   // commit it.

   //

-  if (Parent) {

+  if (Parent != NULL) {

     Tcb->Parent = Parent;

     TcpInsertTcb (Tcb);

   }

 

   if ((Tcb->State != TCP_CLOSED) &&

-      (!TcpToSendData (Tcb, 0)) &&

+      (TcpToSendData (Tcb, 0) == 0) &&

       (TCP_FLG_ON (Tcb->CtrlFlag, TCP_CTRL_ACK_NOW) || Nbuf->TotalSize)) {

 

     TcpToSendAck (Tcb);

@@ -1409,7 +1409,7 @@ DISCARD:
   DEBUG ((EFI_D_WARN, "Tcp4Input: Discard a packet\n"));

   NetbufFree (Nbuf);

 

-  if (Parent && Tcb) {

+  if ((Parent != NULL) && (Tcb != NULL)) {

 

     ASSERT (Tcb->Sk);

     TcpClose (Tcb);

diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Main.c b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Main.c
index 9673b7b..b01704e 100644
--- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Main.c
+++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Main.c
@@ -60,14 +60,19 @@ Tcp4ChkDataBuf (
 

 /**

   Get the current operational status.

+  

+  The GetModeData() function copies the current operational settings of this 

+  EFI TCPv4 Protocol instance into user-supplied buffers. This function can 

+  also be used to retrieve the operational setting of underlying drivers 

+  such as IPv4, MNP, or SNP.

 

   @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.

   @param  Tcp4State                Pointer to the buffer to receive the current TCP

                                    state.

   @param  Tcp4ConfigData           Pointer to the buffer to receive the current TCP

                                    configuration.

-  @param  Ip4ModeData              Pointer to the buffer to receive the current

-                                   IPv4 configuration.

+  @param  Ip4ModeData              Pointer to the buffer to receive the current IPv4 

+                                   configuration data used by the TCPv4 instance.

   @param  MnpConfigData            Pointer to the buffer to receive the current MNP

                                    configuration data indirectly used by the TCPv4

                                    Instance.

@@ -84,12 +89,12 @@ Tcp4ChkDataBuf (
 EFI_STATUS

 EFIAPI

 Tcp4GetModeData (

-  IN  CONST EFI_TCP4_PROTOCOL                  * This,

-  OUT       EFI_TCP4_CONNECTION_STATE          * Tcp4State OPTIONAL,

-  OUT       EFI_TCP4_CONFIG_DATA               * Tcp4ConfigData OPTIONAL,

-  OUT       EFI_IP4_MODE_DATA                  * Ip4ModeData OPTIONAL,

-  OUT       EFI_MANAGED_NETWORK_CONFIG_DATA    * MnpConfigData OPTIONAL,

-  OUT       EFI_SIMPLE_NETWORK_MODE            * SnpModeData OPTIONAL

+  IN  CONST EFI_TCP4_PROTOCOL                  *This,

+  OUT       EFI_TCP4_CONNECTION_STATE          *Tcp4State       OPTIONAL,

+  OUT       EFI_TCP4_CONFIG_DATA               *Tcp4ConfigData  OPTIONAL,

+  OUT       EFI_IP4_MODE_DATA                  *Ip4ModeData     OPTIONAL,

+  OUT       EFI_MANAGED_NETWORK_CONFIG_DATA    *MnpConfigData   OPTIONAL,

+  OUT       EFI_SIMPLE_NETWORK_MODE            *SnpModeData     OPTIONAL

   )

 {

   TCP4_MODE_DATA  TcpMode;

@@ -114,6 +119,22 @@ Tcp4GetModeData (
 /**

   Initialize or brutally reset the operational parameters for

   this EFI TCPv4 instance.

+  

+  The Configure() function does the following:

+  * Initialize this EFI TCPv4 instance, i.e., initialize the communication end 

+  setting, specify active open or passive open for an instance.

+  * Reset this TCPv4 instance brutally, i.e., cancel all pending asynchronous 

+  tokens, flush transmission and receiving buffer directly without informing 

+  the communication peer.

+  No other TCPv4 Protocol operation can be executed by this instance 

+  until it is configured properly. For an active TCP4 instance, after a proper 

+  configuration it may call Connect() to initiates the three-way handshake. 

+  For a passive TCP4 instance, its state will transit to Tcp4StateListen after 

+  configuration, and Accept() may be called to listen the incoming TCP connection 

+  request. If TcpConfigData is set to NULL, the instance is reset. Resetting 

+  process will be done brutally, the state machine will be set to Tcp4StateClosed 

+  directly, the receive queue and transmit queue will be flushed, and no traffic is 

+  allowed through this instance.

 

   @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.

   @param  TcpConfigData            Pointer to the configure data to configure the

@@ -136,8 +157,8 @@ Tcp4GetModeData (
 EFI_STATUS

 EFIAPI

 Tcp4Configure (

-  IN EFI_TCP4_PROTOCOL        * This,

-  IN EFI_TCP4_CONFIG_DATA     * TcpConfigData OPTIONAL

+  IN EFI_TCP4_PROTOCOL        *This,

+  IN EFI_TCP4_CONFIG_DATA     *TcpConfigData     OPTIONAL

   )

 {

   EFI_TCP4_OPTION  *Option;

@@ -199,15 +220,35 @@ Tcp4Configure (
 

 /**

   Add or delete routing entries.

+  

+  The Routes() function adds or deletes a route from the instance¡¯s routing table.

+  The most specific route is selected by comparing the SubnetAddress with the 

+  destination IP address¡¯s arithmetical AND to the SubnetMask.

+  The default route is added with both SubnetAddress and SubnetMask set to 0.0.0.0. 

+  The default route matches all destination IP addresses if there is no more specific route.

+  Direct route is added with GatewayAddress set to 0.0.0.0. Packets are sent to 

+  the destination host if its address can be found in the Address Resolution Protocol (ARP) 

+  cache or it is on the local subnet. If the instance is configured to use default 

+  address, a direct route to the local network will be added automatically.

+  Each TCP instance has its own independent routing table. Instance that uses the 

+  default IP address will have a copy of the EFI_IP4_CONFIG_PROTOCOL¡¯s routing table. 

+  The copy will be updated automatically whenever the IP driver reconfigures its 

+  instance. As a result, the previous modification to the instance¡¯s local copy 

+  will be lost. The priority of checking the route table is specific with IP 

+  implementation and every IP implementation must comply with RFC 1122.

 

   @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.

   @param  DeleteRoute              If TRUE, delete the specified route from routing

                                    table; if FALSE, add the specified route to

                                    routing table.

+                                   DestinationAddress and SubnetMask are used as 

+                                   the keywords to search route entry.

   @param  SubnetAddress            The destination network.

   @param  SubnetMask               The subnet mask for the destination network.

-  @param  GatewayAddress           The gateway address for this route.

-

+  @param  GatewayAddress           The gateway address for this route. 

+                                   It must be on the same subnet with the station 

+                                   address unless a direct route is specified.

+                                   

   @retval EFI_SUCCESS              The operation completed successfully.

   @retval EFI_NOT_STARTED          The EFI_TCP4_PROTOCOL instance has not been

                                    configured.

@@ -253,12 +294,22 @@ Tcp4Routes (
 /**

   Initiate a nonblocking TCP connection request for an active TCP instance.

 

+  The Connect() function will initiate an active open to the remote peer configured 

+  in current TCP instance if it is configured active. If the connection succeeds 

+  or fails due to any error, the ConnectionToken->CompletionToken.Event will be 

+  signaled and ConnectionToken->CompletionToken.Status will be updated accordingly. 

+  This function can only be called for the TCP instance in Tcp4StateClosed state. 

+  The instance will transfer into Tcp4StateSynSent if the function returns EFI_SUCCESS. 

+  If TCP three way handshake succeeds, its state will become Tcp4StateEstablished, 

+  otherwise, the state will return to Tcp4StateClosed.

+  

   @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance

   @param  ConnectionToken          Pointer to the connection token to return when

                                    the TCP three way handshake finishes.

 

-  @retval EFI_SUCCESS              The connection request is successfully

-                                   initiated.

+  @retval EFI_SUCCESS              The connection request is successfully initiated 

+                                   and the state of this TCPv4 instance has 

+                                   been changed to Tcp4StateSynSent.

   @retval EFI_NOT_STARTED          This EFI_TCP4_PROTOCOL instance hasn't been

                                    configured.

   @retval EFI_ACCESS_DENIED        The instance is not configured as an active one

@@ -293,6 +344,16 @@ Tcp4Connect (
 /**

   Listen on the passive instance to accept an incoming connection request.

 

+  The Accept() function initiates an asynchronous accept request to wait for an 

+  incoming connection on the passive TCP instance. If a remote peer successfully 

+  establishes a connection with this instance, a new TCP instance will be created 

+  and its handle will be returned in ListenToken->NewChildHandle. The newly created 

+  instance is configured by inheriting the passive instance¡¯s configuration and is 

+  ready for use upon return. The instance is in the Tcp4StateEstablished state.

+  The ListenToken->CompletionToken.Event will be signaled when a new connection 

+  is accepted, user aborts the listen or connection is reset. This function only 

+  can be called when current TCP instance is in Tcp4StateListen state.

+

   @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance

   @param  ListenToken              Pointer to the listen token to return when

                                    operation finishes.

@@ -307,7 +368,7 @@ Tcp4Connect (
   @retval EFI_INVALID_PARAMETER    One or more parameters are invalid.

   @retval EFI_OUT_OF_RESOURCES     Could not allocate enough resources to finish

                                    the operation.

-  @retval EFI_DEVICE_ERROR         An unexpected system or network error occurred.

+  @retval EFI_DEVICE_ERROR         Any unexpected and not belonged to above category error.

 

 **/

 EFI_STATUS

@@ -334,6 +395,10 @@ Tcp4Accept (
 /**

   Queues outgoing data into the transmit queue

 

+  The Transmit() function queues a sending request to this TCPv4 instance along 

+  with the user data. The status of the token is updated and the event in the token 

+  will be signaled once the data is sent out or some error occurs.

+

   @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance

   @param  Token                    Pointer to the completion token to queue to the

                                    transmit queue

@@ -346,12 +411,13 @@ Tcp4Accept (
   @retval EFI_INVALID_PARAMETER    One or more parameters are invalid

   @retval EFI_ACCESS_DENIED        One or more of the following conditions is TRUE:

                                    * A transmit completion token with the same

-                                   Token-> CompletionToken.Event was already in the

-                                   transmission queue. * The current instance is in

-                                   Tcp4StateClosed state * The current instance is

-                                   a passive one and it is in Tcp4StateListen

-                                   state. * User has called Close() to disconnect

-                                   this connection.

+                                     Token-> CompletionToken.Event was already in the

+                                     transmission queue. 

+                                   * The current instance is in Tcp4StateClosed state 

+                                   * The current instance is a passive one and 

+                                     it is in Tcp4StateListen state. 

+                                   * User has called Close() to disconnect this 

+                                     connection.

   @retval EFI_NOT_READY            The completion token could not be queued because

                                    the transmit queue is full.

   @retval EFI_OUT_OF_RESOURCES     Could not queue the transmit data because of

@@ -399,6 +465,18 @@ Tcp4Transmit (
 /**

   Place an asynchronous receive request into the receiving queue.

 

+  The Receive() function places a completion token into the receive packet queue. 

+  This function is always asynchronous. The caller must allocate the 

+  Token->CompletionToken.Event and the FragmentBuffer used to receive data. He also 

+  must fill the DataLength which represents the whole length of all FragmentBuffer. 

+  When the receive operation completes, the EFI TCPv4 Protocol driver updates the 

+  Token->CompletionToken.Status and Token->Packet.RxData fields and the 

+  Token->CompletionToken.Event is signaled. If got data the data and its length 

+  will be copy into the FragmentTable, in the same time the full length of received 

+  data will be recorded in the DataLength fields. Providing a proper notification 

+  function and context for the event will enable the user to receive the notification 

+  and receiving status. That notification function is guaranteed to not be re-entered.

+

   @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.

   @param  Token                    Pointer to a token that is associated with the

                                    receive data descriptor.

@@ -412,14 +490,17 @@ Tcp4Transmit (
   @retval EFI_OUT_OF_RESOURCES     The receive completion token could not be queued

                                    due to a lack of system resources.

   @retval EFI_DEVICE_ERROR         An unexpected system or network error occurred.

+                                   The EFI TCPv4 Protocol instance has been reset 

+                                   to startup defaults.

   @retval EFI_ACCESS_DENIED        One or more of the following conditions is TRUE:

                                    * A receive completion token with the same

-                                   Token->CompletionToken.Event was already in the

-                                   receive queue. * The current instance is in

-                                   Tcp4StateClosed state. * The current instance is

-                                   a passive one and it is in Tcp4StateListen

-                                   state. * User has called Close() to disconnect

-                                   this connection.

+                                     Token->CompletionToken.Event was already in 

+                                     the receive queue. 

+                                   * The current instance is in Tcp4StateClosed state. 

+                                   * The current instance is a passive one and it 

+                                     is in Tcp4StateListen state. 

+                                   * User has called Close() to disconnect this 

+                                     connection.

   @retval EFI_CONNECTION_FIN       The communication peer has closed the connection

                                    and there is no any buffered data in the receive

                                    buffer of this instance.

@@ -466,6 +547,15 @@ Tcp4Receive (
 /**

   Disconnecting a TCP connection gracefully or reset a TCP connection.

 

+  Initiate an asynchronous close token to TCP driver. After Close() is called, 

+  any buffered transmission data will be sent by TCP driver and the current 

+  instance will have a graceful close working flow described as RFC 793 if 

+  AbortOnClose is set to FALSE, otherwise, a rest packet will be sent by TCP 

+  driver to fast disconnect this connection. When the close operation completes 

+  successfully the TCP instance is in Tcp4StateClosed state, all pending 

+  asynchronous operation is signaled and any buffers used for TCP network traffic 

+  is flushed.

+

   @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance

   @param  CloseToken               Pointer to the close token to return when

                                    operation finishes.

@@ -473,11 +563,11 @@ Tcp4Receive (
   @retval EFI_SUCCESS              The operation completed successfully

   @retval EFI_NOT_STARTED          The EFI_TCP4_PROTOCOL instance hasn't been

                                    configured.

-  @retval EFI_ACCESS_DENIED        One or more of the following are TRUE: *

-                                   Configure() has been called with TcpConfigData

-                                   set to NULL and this function has not returned.

+  @retval EFI_ACCESS_DENIED        One or more of the following are TRUE: 

+                                   * Configure() has been called with TcpConfigData

+                                     set to NULL and this function has not returned.

                                    * Previous Close() call on this instance has not

-                                   finished.

+                                     finished.

   @retval EFI_INVALID_PARAMETER    One ore more parameters are invalid

   @retval EFI_OUT_OF_RESOURCES     Could not allocate enough resource to finish the

                                    operation

@@ -509,21 +599,38 @@ Tcp4Close (
 /**

   Abort an asynchronous connection, listen, transmission or receive request.

 

+  The Cancel() function aborts a pending connection, listen, transmit or receive 

+  request. If Token is not NULL and the token is in the connection, listen, 

+  transmission or receive queue when it is being cancelled, its Token->Status 

+  will be set to EFI_ABORTED and then Token->Event will be signaled. If the token 

+  is not in one of the queues, which usually means that the asynchronous operation 

+  has completed, EFI_NOT_FOUND is returned. If Token is NULL all asynchronous token 

+  issued by Connect(), Accept(), Transmit() and Receive()will be aborted.

+

   @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.

   @param  Token                    Pointer to a token that has been issued by

                                    Connect(), Accept(), Transmit() or Receive(). If

                                    NULL, all pending tokens issued by above four

                                    functions will be aborted.

-

-  @retval EFI_UNSUPPORTED          The operation is not supported in current

+                                   

+  @retval  EFI_SUCCESS             The asynchronous I/O request is aborted and Token->Event

+                                   is signaled.

+  @retval  EFI_INVALID_PARAMETER   This is NULL.

+  @retval  EFI_NOT_STARTED         This instance hasn¡¯t been configured.

+  @retval  EFI_NO_MAPPING          When using the default address, configuration

+                                   (DHCP, BOOTP,RARP, etc.) hasn¡¯t finished yet.

+  @retval  EFI_NOT_FOUND           The asynchronous I/O request isn¡¯t found in the 

+                                   transmission or receive queue. It has either 

+                                   completed or wasn¡¯t issued by Transmit() and Receive().

+  @retval  EFI_UNSUPPORTED         The operation is not supported in current

                                    implementation.

 

 **/

 EFI_STATUS

 EFIAPI

 Tcp4Cancel (

-  IN EFI_TCP4_PROTOCOL           * This,

-  IN EFI_TCP4_COMPLETION_TOKEN   * Token OPTIONAL

+  IN EFI_TCP4_PROTOCOL           *This,

+  IN EFI_TCP4_COMPLETION_TOKEN   *Token    OPTIONAL

   )

 {

   return EFI_UNSUPPORTED;

@@ -533,6 +640,13 @@ Tcp4Cancel (
 /**

   Poll to receive incoming data and transmit outgoing segments.

 

+  The Poll() function increases the rate that data is moved between the network 

+  and application and can be called when the TCP instance is created successfully. 

+  Its use is optional. In some implementations, the periodical timer in the MNP 

+  driver may not poll the underlying communications device fast enough to avoid 

+  drop packets. Drivers and applications that are experiencing packet loss should 

+  try calling the Poll() function in a high frequency.

+

   @param  This                     Pointer to the EFI_TCP4_PROTOCOL instance.

 

   @retval EFI_SUCCESS              Incoming or outgoing data was processed.

diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Main.h b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Main.h
index 0f5d17a..f1a69ab 100644
--- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Main.h
+++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Main.h
@@ -64,12 +64,12 @@ typedef struct _TCP4_ROUTE_INFO {
 EFI_STATUS

 EFIAPI

 Tcp4GetModeData (

-  IN  CONST EFI_TCP4_PROTOCOL                  * This,

-  OUT       EFI_TCP4_CONNECTION_STATE          * Tcp4State OPTIONAL,

-  OUT       EFI_TCP4_CONFIG_DATA               * Tcp4ConfigData OPTIONAL,

-  OUT       EFI_IP4_MODE_DATA                  * Ip4ModeData OPTIONAL,

-  OUT       EFI_MANAGED_NETWORK_CONFIG_DATA    * MnpConfigData OPTIONAL,

-  OUT       EFI_SIMPLE_NETWORK_MODE            * SnpModeData OPTIONAL

+  IN  CONST EFI_TCP4_PROTOCOL                  *This,

+  OUT       EFI_TCP4_CONNECTION_STATE          *Tcp4State OPTIONAL,

+  OUT       EFI_TCP4_CONFIG_DATA               *Tcp4ConfigData OPTIONAL,

+  OUT       EFI_IP4_MODE_DATA                  *Ip4ModeData OPTIONAL,

+  OUT       EFI_MANAGED_NETWORK_CONFIG_DATA    *MnpConfigData OPTIONAL,

+  OUT       EFI_SIMPLE_NETWORK_MODE            *SnpModeData OPTIONAL

   );

 

 //

@@ -78,8 +78,8 @@ Tcp4GetModeData (
 EFI_STATUS

 EFIAPI

 Tcp4Configure (

-  IN EFI_TCP4_PROTOCOL        * This,

-  IN EFI_TCP4_CONFIG_DATA     * TcpConfigData OPTIONAL

+  IN EFI_TCP4_PROTOCOL        *This,

+  IN EFI_TCP4_CONFIG_DATA     *TcpConfigData OPTIONAL

   );

 

 //

@@ -133,6 +133,7 @@ Tcp4Transmit (
 // through this TCP instance

 //

 EFI_STATUS

+EFIAPI

 Tcp4Receive (

   IN EFI_TCP4_PROTOCOL           *This,

   IN EFI_TCP4_IO_TOKEN           *Token

@@ -155,8 +156,8 @@ Tcp4Close (
 EFI_STATUS

 EFIAPI

 Tcp4Cancel (

-  IN EFI_TCP4_PROTOCOL           * This,

-  IN EFI_TCP4_COMPLETION_TOKEN   * Token OPTIONAL

+  IN EFI_TCP4_PROTOCOL           *This,

+  IN EFI_TCP4_COMPLETION_TOKEN   *Token OPTIONAL

   );

 

 //

diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Misc.c b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Misc.c
index 12f5e43..ca65f3e 100644
--- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Misc.c
+++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Misc.c
@@ -477,7 +477,7 @@ TcpGetIss (
 /**

   Get the local mss.

 

-  None

+  @param  Sock        Pointer to the socket to get mss

 

   @return The mss size.

 

diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Option.h b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Option.h
index ad856c7..faa4ffa 100644
--- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Option.h
+++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Option.h
@@ -33,7 +33,7 @@ typedef struct s_TCP_OPTION {
   UINT32  TSEcr;    // the TSEcr field in a timestamp option

 } TCP_OPTION;

 

-enum {

+typedef enum {

 

   //

   // supported TCP option type and their length

@@ -68,12 +68,12 @@ enum {
   //

   // Other misc definations

   //

-  TCP_OPTION_MAX_WS         = 14,     // Maxium window scale value

-  TCP_OPTION_MAX_WIN        = 0xffff, // max window size in TCP header

   TCP_OPTION_RCVD_MSS       = 0x01,

   TCP_OPTION_RCVD_WS        = 0x02,

-  TCP_OPTION_RCVD_TS        = 0x04

-};

+  TCP_OPTION_RCVD_TS        = 0x04,

+  TCP_OPTION_MAX_WS         = 14,     // Maxium window scale value

+  TCP_OPTION_MAX_WIN        = 0xffff  // max window size in TCP header

+} TCP_OPTION_TYPE;

 

 UINT8

 TcpComputeScale (

diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Output.c b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Output.c
index 82170e2..39fbc3b 100644
--- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Output.c
+++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Output.c
@@ -235,7 +235,7 @@ TcpDataToSend (
     Len = Tcb->SndMss;

   }

 

-  if (Force || (Len == 0 && Left == 0)) {

+  if ((Force != 0)|| (Len == 0 && Left == 0)) {

     return Len;

   }

 

@@ -528,7 +528,7 @@ TcpGetSegmentSndQue (
   //

   // copy data to the segment

   //

-  if (CopyLen) {

+  if (CopyLen != 0) {

     Data = NetbufAllocSpace (Nbuf, CopyLen, NET_BUF_TAIL);

     ASSERT (Data);

 

@@ -587,7 +587,7 @@ TcpGetSegmentSock (
 

   DataGet = 0;

 

-  if (Len) {

+  if (Len != 0) {

     //

     // copy data to the segment.

     //

@@ -762,7 +762,7 @@ SEND_AGAIN:
 

   Flag  = mTcpOutFlag[Tcb->State];

 

-  if (Flag & TCP_FLG_SYN) {

+  if ((Flag & TCP_FLG_SYN) != 0) {

 

     Seq = Tcb->Iss;

     Len = 0;

@@ -772,7 +772,8 @@ SEND_AGAIN:
   // only send a segment without data if SYN or

   // FIN is set.

   //

-  if ((Len == 0) && !(Flag & (TCP_FLG_SYN | TCP_FLG_FIN))) {

+  if ((Len == 0) && 

+      ((Flag & (TCP_FLG_SYN | TCP_FLG_FIN)) == 0)) {

     return Sent;

   }

 

@@ -799,7 +800,7 @@ SEND_AGAIN:
     End++;

   }

 

-  if (Flag & TCP_FLG_FIN) {

+  if ((Flag & TCP_FLG_FIN) != 0) {

     //

     // Send FIN if all data is sent, and FIN is

     // in the window

@@ -843,7 +844,7 @@ SEND_AGAIN:
     NetbufTrim (Nbuf, (Nbuf->Tcp->HeadLen << 2), NET_BUF_HEAD);

     Nbuf->Tcp = NULL;

 

-    if (Flag & TCP_FLG_FIN) {

+    if ((Flag & TCP_FLG_FIN) != 0)  {

       TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_FIN_SENT);

     }

 

@@ -867,7 +868,7 @@ SEND_AGAIN:
   //

   Tcb->DelayedAck = 0;

 

-  if (Flag & TCP_FLG_FIN) {

+  if ((Flag & TCP_FLG_FIN) != 0) {

     TCP_SET_FLG (Tcb->CtrlFlag, TCP_CTRL_FIN_SENT);

   }

 

diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Proto.h b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Proto.h
index d0e7fd4..ee278e3 100644
--- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Proto.h
+++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Proto.h
@@ -31,7 +31,7 @@ typedef struct _TCP_CB  TCP_CB;
 // tcp states, Don't change their order, it is used as

 // index to mTcpOutFlag and other macros

 //

-enum {

+typedef enum {

   TCP_CLOSED      = 0,

   TCP_LISTEN,

   TCP_SYN_SENT,

@@ -43,12 +43,12 @@ enum {
   TCP_TIME_WAIT,

   TCP_CLOSE_WAIT,

   TCP_LAST_ACK

-};

+} TCP_STATES;

 

 //

 // flags in the TCP header

 //

-enum {

+typedef enum {

 

   TCP_FLG_FIN     = 0x01,

   TCP_FLG_SYN     = 0x02,

@@ -57,9 +57,9 @@ enum {
   TCP_FLG_ACK     = 0x10,

   TCP_FLG_URG     = 0x20,

   TCP_FLG_FLAG    = 0x3F  // mask for all the flags

-};

+} TCP_HEADER_FLAG;

 

-enum {

+typedef enum {

 

   //

   // TCP error status

@@ -145,7 +145,7 @@ enum {
   TCP_KEEPALIVE_PERIOD_MIN= TCP_TICK_HZ *30,

   TCP_FIN_WAIT2_TIME_MAX  = 4 *TCP_TICK_HZ,

   TCP_TIME_WAIT_TIME_MAX  = 60 *TCP_TICK_HZ

-};

+} TCP_MISC_VALUES;

 

 typedef struct _TCP_SEG {

   TCP_SEQNO Seq;  // Starting sequence number

diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Timer.c b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Timer.c
index 0b15179..3c02c53 100644
--- a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Timer.c
+++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Timer.c
@@ -461,7 +461,7 @@ TcpBackoffRto (
   // may be wrong, fold it. So the next time a valid

   // measurement is sampled, we can start fresh.

   //

-  if ((Tcb->LossTimes >= TCP_FOLD_RTT) && Tcb->SRtt) {

+  if ((Tcb->LossTimes >= TCP_FOLD_RTT) && (Tcb->SRtt != 0)) {

     Tcb->RttVar += Tcb->SRtt >> 2;

     Tcb->SRtt = 0;

   }

@@ -521,7 +521,7 @@ TcpTickingDpc (
 

     Tcb->Idle++;

 

-    if (Tcb->DelayedAck) {

+    if (Tcb->DelayedAck != 0) {

       TcpSendAck (Tcb);

     }