Add IScsiDxe driver to NetworkPkg in order to support iSCSI over IPv6 stack and iSCSI MPIO.

Signed-off-by: tye1
Reviewed-by: hhuan13
Reviewed-by: eric_tian


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12149 6f19259b-4bc3-4df7-8a09-765794883524

NetworkPkg/IScsiDxe/IScsiDhcp.h

@@ -0,0 +1,62 @@
+/** @file
+  The head file of iSCSI DHCP4 related configuration routines.
+
+Copyright (c) 2004 - 2010, Intel Corporation. All rights reserved.<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 _ISCSI_DHCP_H_
+#define _ISCSI_DHCP_H_
+
+
+#define DHCP4_TAG_PARA_LIST             55
+#define DHCP4_TAG_NETMASK               1
+#define DHCP4_TAG_ROUTER                3
+#define DHCP4_TAG_DNS                   6
+#define DHCP4_TAG_SERVER_ID             54
+#define DHCP4_TAG_ROOT_PATH             17
+#define ISCSI_ROOT_PATH_ID              "iscsi:"
+#define ISCSI_ROOT_PATH_FIELD_DELIMITER ':'
+
+#define RP_FIELD_IDX_SERVERNAME         0
+#define RP_FIELD_IDX_PROTOCOL           1
+#define RP_FIELD_IDX_PORT               2
+#define RP_FIELD_IDX_LUN                3
+#define RP_FIELD_IDX_TARGETNAME         4
+#define RP_FIELD_IDX_MAX                5
+
+typedef struct _ISCSI_ATTEMPT_CONFIG_NVDATA ISCSI_ATTEMPT_CONFIG_NVDATA;
+
+typedef struct _ISCSI_ROOT_PATH_FIELD {
+  CHAR8 *Str;
+  UINT8 Len;
+} ISCSI_ROOT_PATH_FIELD;
+
+/**
+  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_OUT_OF_RESOURCES  Failed to allocate memory.
+  @retval EFI_NO_MEDIA          There was a media error.
+  @retval Others                Other errors as indicated.
+
+**/
+EFI_STATUS
+IScsiDoDhcp (
+  IN     EFI_HANDLE                  Image,
+  IN     EFI_HANDLE                  Controller,
+  IN OUT ISCSI_ATTEMPT_CONFIG_NVDATA *ConfigData
+  );
+
+#endif