1 files changed, 107 insertions, 0 deletions
diff --git a/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Option.h b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Option.h
new file mode 100644
index 0000000000..8074cb5564
--- /dev/null
+++ b/MdeModulePkg/Universal/Network/Tcp4Dxe/Tcp4Option.h
@@ -0,0 +1,107 @@
+/** @file
+
+Copyright (c) 2005 - 2006, Intel Corporation
+All rights reserved. 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.
+
+Module Name:
+
+  Tcp4Option.h
+
+Abstract:
+
+
+**/
+
+#ifndef _TCP4_OPTION_H_
+#define _TCP4_OPTION_H_
+
+//
+// The structure to store the parse option value.
+// ParseOption only parse the options, don't process them.
+//
+typedef struct s_TCP_OPTION {
+  UINT8   Flag;     // flag such as TCP_OPTION_RCVD_MSS
+  UINT8   WndScale; // the WndScale received
+  UINT16  Mss;      // the Mss received
+  UINT32  TSVal;    // the TSVal field in a timestamp option
+  UINT32  TSEcr;    // the TSEcr field in a timestamp option
+} TCP_OPTION;
+
+enum {
+
+  //
+  // supported TCP option type and their length
+  //
+  TCP_OPTION_EOP            = 0,  // End Of oPtion
+  TCP_OPTION_NOP            = 1,  // No-Option.
+  TCP_OPTION_MSS            = 2,  // Maximum Segment Size
+  TCP_OPTION_WS             = 3,  // Window scale
+  TCP_OPTION_TS             = 8,  // Timestamp
+  TCP_OPTION_MSS_LEN        = 4,  // length of MSS option
+  TCP_OPTION_WS_LEN         = 3,  // length of window scale option
+  TCP_OPTION_TS_LEN         = 10, // length of timestamp option
+  TCP_OPTION_WS_ALIGNED_LEN = 4,  // length of window scale option, aligned
+  TCP_OPTION_TS_ALIGNED_LEN = 12, // length of timestamp option, aligned
+
+  //
+  // recommend format of timestamp window scale
+  // option for fast process.
+  //
+  TCP_OPTION_TS_FAST = ((TCP_OPTION_NOP << 24) |
+                        (TCP_OPTION_NOP << 16) |
+                        (TCP_OPTION_TS << 8) |
+                        TCP_OPTION_TS_LEN),
+
+  TCP_OPTION_WS_FAST = ((TCP_OPTION_NOP << 24) |
+                        (TCP_OPTION_WS << 16) |
+                        (TCP_OPTION_WS_LEN << 8)),
+
+  TCP_OPTION_MSS_FAST = ((TCP_OPTION_MSS << 24) |
+                         (TCP_OPTION_MSS_LEN << 16)),
+
+  //
+  // 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,
+};
+
+UINT8
+TcpComputeScale (
+  IN TCP_CB *Tcb
+  );
+
+UINT16
+TcpSynBuildOption (
+  IN TCP_CB  *Tcb,
+  IN NET_BUF *Buf
+  );
+
+UINT16
+TcpBuildOption (
+  IN TCP_CB  *Tcb,
+  IN NET_BUF *Buf
+  );
+
+INTN
+TcpParseOption (
+  IN TCP_HEAD   *Tcp,
+  IN TCP_OPTION *Option
+  );
+
+UINT32
+TcpPawsOK (
+  IN TCP_CB *Tcb,
+  IN UINT32 TSVal
+  );
+
+#endif