/* Editor Settings: expandtabs and use 4 spaces for indentation
 * ex: set softtabstop=4 tabstop=8 expandtab shiftwidth=4: *
 */

/*
 * Copyright Likewise Software
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.  You should have received a copy of the GNU General
 * Public License along with this program.  If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * LIKEWISE SOFTWARE MAKES THIS SOFTWARE AVAILABLE UNDER OTHER LICENSING
 * TERMS AS WELL.  IF YOU HAVE ENTERED INTO A SEPARATE LICENSE AGREEMENT
 * WITH LIKEWISE SOFTWARE, THEN YOU MAY ELECT TO USE THE SOFTWARE UNDER THE
 * TERMS OF THAT SOFTWARE LICENSE AGREEMENT INSTEAD OF THE TERMS OF THE GNU
 * GENERAL PUBLIC LICENSE, NOTWITHSTANDING THE ABOVE NOTICE.  IF YOU
 * HAVE QUESTIONS, OR WISH TO REQUEST A COPY OF THE ALTERNATE LICENSING
 * TERMS OFFERED BY LIKEWISE SOFTWARE, PLEASE CONTACT LIKEWISE SOFTWARE AT
 * license@likewisesoftware.com
 */

/*
 * Copyright (C) Likewise Software. All rights reserved.
 *
 * Module Name:
 *
 *        treeconnect.c
 *
 * Abstract:
 *
 *        Likewise IO (LWIO) - SRV
 *
 *        Protocols API - SMBV2
 *
 *        Tree Connect
 *
 * Authors: Krishna Ganugapati (kganugapati@likewise.com)
 *          Sriram Nambakam (snambakam@likewise.com)
 *
 *
 */
#include "includes.h"

NTSTATUS
SrvProcessTreeConnect_SMB_V2(
    PSRV_EXEC_CONTEXT pExecContext
    )
{
    NTSTATUS ntStatus = STATUS_SUCCESS;
    PLWIO_SRV_CONNECTION pConnection = pExecContext->pConnection;
    PSRV_PROTOCOL_EXEC_CONTEXT pCtxProtocol  = pExecContext->pProtocolContext;
    PSRV_EXEC_CONTEXT_SMB_V2   pCtxSmb2      = pCtxProtocol->pSmb2Context;
    ULONG                      iMsg          = pCtxSmb2->iMsg;
    PSRV_MESSAGE_SMB_V2        pSmbRequest   = &pCtxSmb2->pRequests[iMsg];
    PSRV_MESSAGE_SMB_V2        pSmbResponse  = &pCtxSmb2->pResponses[iMsg];
    PSMB2_TREE_CONNECT_REQUEST_HEADER pTreeConnectHeader = NULL;// Do not free
    PSMB2_TREE_CONNECT_RESPONSE_HEADER pTreeConnectResponseHeader = NULL; // Do not free
    UNICODE_STRING    wszPath = {0}; // Do not free
    PLWIO_SRV_SESSION_2 pSession = NULL;
    PSRV_SHARE_INFO pShareInfo = NULL;
    PWSTR pwszPath = NULL;
    PWSTR pwszSharename = NULL;
    BOOLEAN bInLock = FALSE;
    BOOLEAN bRemoveTreeFromSession = FALSE;
    PBYTE pOutBuffer = pSmbResponse->pBuffer;
    ULONG ulBytesAvailable = pSmbResponse->ulBytesAvailable;
    ULONG ulOffset    = 0;
    ULONG ulBytesUsed = 0;
    ULONG ulTotalBytesUsed = 0;

    if (pCtxSmb2->pTree)
    {
        ntStatus = STATUS_INVALID_NETWORK_RESPONSE;
        BAIL_ON_NT_STATUS(ntStatus);
    }

    ntStatus = SrvConnection2FindSession_SMB_V2(
                    pCtxSmb2,
                    pConnection,
                    pSmbRequest->pHeader->ullSessionId,
                    &pSession);
    BAIL_ON_NT_STATUS(ntStatus);

    ntStatus = SMB2UnmarshalTreeConnect(
                    pSmbRequest,
                    &pTreeConnectHeader,
                    &wszPath);
    BAIL_ON_NT_STATUS(ntStatus);

    ntStatus = SrvAllocateMemory(
                    wszPath.Length + sizeof(wchar16_t),
                    (PVOID*)&pwszPath);
    BAIL_ON_NT_STATUS(ntStatus);

    memcpy((PBYTE)pwszPath, (PBYTE)wszPath.Buffer, wszPath.Length);

    LWIO_LOCK_RWMUTEX_SHARED(bInLock, &pConnection->pHostinfo->mutex);

    ntStatus = SrvGetShareName(
                    pConnection->pHostinfo->pszHostname,
                    pConnection->pHostinfo->pszDomain,
                    pwszPath,
                    &pwszSharename);
    BAIL_ON_NT_STATUS(ntStatus);

    LWIO_UNLOCK_RWMUTEX(bInLock, &pConnection->pHostinfo->mutex);

    ntStatus = SrvShareFindByName(
                    pConnection->pShareList,
                    pwszSharename,
                    &pShareInfo);
    if (ntStatus == STATUS_NOT_FOUND)
    {
        ntStatus = STATUS_BAD_NETWORK_NAME;
    }
    BAIL_ON_NT_STATUS(ntStatus);

    ntStatus = SrvSession2CreateTree(
                    pSession,
                    pShareInfo,
                    &pCtxSmb2->pTree);
    BAIL_ON_NT_STATUS(ntStatus);

    bRemoveTreeFromSession = TRUE;

    ntStatus = SMB2MarshalHeader(
                    pOutBuffer,
                    ulOffset,
                    ulBytesAvailable,
                    COM2_TREE_CONNECT,
                    pSmbRequest->pHeader->usEpoch,
                    pSmbRequest->pHeader->usCredits,
                    pSmbRequest->pHeader->ulPid,
                    pSmbRequest->pHeader->ullCommandSequence,
                    pCtxSmb2->pTree->ulTid,
                    pSession->ullUid,
                    0LL, /* Async Id */
                    STATUS_SUCCESS,
                    TRUE,
                    LwIsSetFlag(
                        pSmbRequest->pHeader->ulFlags,
                        SMB2_FLAGS_RELATED_OPERATION),
                    &pSmbResponse->pHeader,
                    &pSmbResponse->ulHeaderSize);
    BAIL_ON_NT_STATUS(ntStatus);

    pOutBuffer       += pSmbResponse->ulHeaderSize;
    ulOffset         += pSmbResponse->ulHeaderSize;
    ulBytesAvailable -= pSmbResponse->ulHeaderSize;
    ulTotalBytesUsed += pSmbResponse->ulHeaderSize;

    ntStatus = SMB2MarshalTreeConnectResponse(
                    pOutBuffer,
                    ulOffset,
                    ulBytesAvailable,
                    pConnection,
                    pCtxSmb2->pTree,
                    &pTreeConnectResponseHeader,
                    &ulBytesUsed);
    BAIL_ON_NT_STATUS(ntStatus);

    // pTreeConnectResponseHeader->ulShareFlags |=
    //                         SMB2_SHARE_FLAGS_DFS;
    // pTreeConnectResponseHeader->ulShareFlags |=
    //                         SMB2_SHARE_FLAGS_DFS_ROOT;
    // pTreeConnectResponseHeader->ulShareFlags |=
    //                         SMB2_SHARE_FLAGS_RESTRICT_EXCL_OPENS;
    // pTreeConnectResponseHeader->ulShareFlags |=
    //                         SMB2_SHARE_FLAGS_FORCE_SHARED_DELETE;
    // pTreeConnectResponseHeader->ulShareFlags |=
    //                         SMB2_SHARE_FLAGS_ALLOW_NS_CACHING;
    // pTreeConnectResponseHeader->ulShareFlags |=
    //                         SMB2_SHARE_FLAGS_ACCESS_BASED_DIR_ENUM;

    switch (pTreeConnectResponseHeader->usShareType)
    {
        case SMB2_SHARE_TYPE_DISK:

            // pTreeConnectResponseHeader->ulShareFlags |=
            //                         SMB2_SHARE_FLAGS_FORCE_LEVELII_OPLOCK;

            break;

        case SMB2_SHARE_TYPE_NAMED_PIPE:

            pTreeConnectResponseHeader->ulShareFlags |=
                                    SMB2_SHARE_FLAGS_CSC_NONE;

            break;

        default:

            break;

    }

    // pTreeConnectResponseHeader->ulShareFlags |=
    //                         SMB2_SHARE_FLAGS_ENABLE_HASH;

    // pTreeConnectRequestHeader->ulShareCapabilities |=
    //                             SMB2_SHARE_CAPABILITIES_DFS_AVAILABLE;

    // pOutBuffer += ulBytesUsed;
    // ulOffset += ulBytesUsed;
    // ulBytesAvailable -= ulBytesUsed;
    ulTotalBytesUsed += ulBytesUsed;

    pSmbResponse->ulMessageSize = ulTotalBytesUsed;

cleanup:

    LWIO_UNLOCK_RWMUTEX(bInLock, &pConnection->pHostinfo->mutex);

    if (pSession)
    {
        SrvSession2Release(pSession);
    }

    if (pShareInfo)
    {
        SrvShareReleaseInfo(pShareInfo);
    }

    SRV_SAFE_FREE_MEMORY(pwszPath);

    return ntStatus;

error:

    if (bRemoveTreeFromSession)
    {
        NTSTATUS ntStatus2 = 0;

        ntStatus2 = SrvSession2RemoveTree(pSession, pCtxSmb2->pTree->ulTid);
        if (ntStatus2)
        {
            LWIO_LOG_ERROR("Failed to remove tid [%u] from session [uid=%u][code:%d]",
                            pCtxSmb2->pTree->ulTid,
                            pSmbRequest->pHeader->ullSessionId,
                            ntStatus2);
        }

        SrvTree2Release(pCtxSmb2->pTree);
        pCtxSmb2->pTree = NULL;
    }

    if (ulTotalBytesUsed)
    {
        pSmbResponse->pHeader = NULL;
        memset(pSmbResponse->pBuffer, 0, ulTotalBytesUsed);
    }

    pSmbResponse->ulMessageSize = 0;

    goto cleanup;
}