| 1 | /*++
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| 2 |
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| 3 | Copyright (c) 1989 - 1999 Microsoft Corporation
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| 4 |
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| 5 | Module Name:
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| 6 |
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| 7 | netroot.c
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| 8 |
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| 9 | Abstract:
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| 10 |
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| 11 | This module implements the routines for creating the net root.
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| 12 |
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| 13 | --*/
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| 14 |
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| 15 | #include "precomp.h"
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| 16 | #pragma hdrstop
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| 17 |
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| 18 | //
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| 19 | // Forward declarations ...
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| 20 | //
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| 21 |
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| 22 | NTSTATUS VBoxMRxUpdateNetRootState (IN OUT PMRX_NET_ROOT pNetRoot)
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| 23 | /*++
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| 24 |
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| 25 | Routine Description:
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| 26 |
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| 27 | This routine updates the mini redirector state associated with a net root.
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| 28 |
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| 29 | Arguments:
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| 30 |
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| 31 | pNetRoot - the net root instance.
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| 32 |
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| 33 | Return Value:
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| 34 |
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| 35 | NTSTATUS - The return status for the operation
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| 36 |
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| 37 | Notes:
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| 38 |
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| 39 | By differentiating the mini redirector state from the net root condition it is possible
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| 40 | to permit a variety of reconnect strategies. It is conceivable that the RDBSS considers
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| 41 | a net root to be good while the underlying mini redirector might mark it as invalid
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| 42 | and reconnect on the fly.
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| 43 |
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| 44 | --*/
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| 45 | {
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| 46 | NTSTATUS Status = STATUS_NOT_IMPLEMENTED;
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| 47 |
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| 48 | Log(("VBOXSF: VBoxMRxUpdateNetRootState: Called.\n"));
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| 49 | return (Status);
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| 50 | }
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| 51 |
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| 52 | NTSTATUS VBoxMRxInitializeNetRootEntry (IN PMRX_NET_ROOT pNetRoot)
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| 53 | /*++
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| 54 |
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| 55 | Routine Description:
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| 56 |
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| 57 | This routine initializes a new net root.
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| 58 | It also validates rootnames. Eg: attempts to create a
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| 59 | file in a root that has not been created will fail.
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| 60 |
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| 61 | Arguments:
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| 62 |
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| 63 | pNetRoot - the net root
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| 64 |
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| 65 | Return Value:
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| 66 |
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| 67 | NTSTATUS - The return status for the operation
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| 68 |
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| 69 | Notes:
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| 70 |
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| 71 | --*/
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| 72 | {
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| 73 | NTSTATUS Status = STATUS_SUCCESS;
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| 74 | PMRX_SRV_CALL pSrvCall = pNetRoot->pSrvCall;
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| 75 | PMRX_VBOX_NETROOT_EXTENSION pNetRootExtension = (PMRX_VBOX_NETROOT_EXTENSION)pNetRoot->Context;
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| 76 |
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| 77 | Log(("VBOXSF: VBoxMRxInitializeNetRootEntry: Called.\n"));
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| 78 | return Status;
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| 79 | }
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| 80 |
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| 81 | NTSTATUS VBoxUpdateNetRoot (PMRX_NET_ROOT pNetRoot)
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| 82 | /*++
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| 83 |
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| 84 | Routine Description:
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| 85 |
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| 86 | This routine initializes the wrapper data structure corresponding to a
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| 87 | given net root entry.
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| 88 |
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| 89 | Arguments:
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| 90 |
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| 91 | pNetRootEntry - the server entry
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| 92 |
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| 93 | Return Value:
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| 94 |
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| 95 | STATUS_SUCCESS if successful
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| 96 |
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| 97 | --*/
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| 98 | {
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| 99 | PAGED_CODE();
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| 100 |
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| 101 | Log(("VBOXSF: VBoxUpdateNetRoot: NetRoot = 0x%x Type = 0x%x\n", pNetRoot, pNetRoot->Type));
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| 102 |
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| 103 | switch (pNetRoot->Type)
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| 104 | {
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| 105 | case NET_ROOT_DISK:
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| 106 | pNetRoot->DeviceType = RxDeviceType(DISK);
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| 107 | break;
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| 108 |
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| 109 | case NET_ROOT_PIPE:
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| 110 | pNetRoot->DeviceType = RxDeviceType(NAMED_PIPE);
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| 111 | break;
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| 112 | case NET_ROOT_COMM:
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| 113 | pNetRoot->DeviceType = RxDeviceType(SERIAL_PORT);
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| 114 | break;
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| 115 | case NET_ROOT_PRINT:
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| 116 | pNetRoot->DeviceType = RxDeviceType(PRINTER);
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| 117 | break;
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| 118 | case NET_ROOT_MAILSLOT:
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| 119 | pNetRoot->DeviceType = RxDeviceType(MAILSLOT);
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| 120 | break;
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| 121 | case NET_ROOT_WILD:
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| 122 | /* We get this type when for example Windows Media player opens an MP3 file.
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| 123 | * This NetRoot has the same remote path (\\vboxsrv\dir) as other NetRoots,
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| 124 | * which were created earlier and which were NET_ROOT_DISK.
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| 125 | *
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| 126 | * In the beginning of the function (UpdateNetRoot) the DDK sample sets
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| 127 | * pNetRoot->Type of newly created NetRoots using a value previously
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| 128 | * pstored in a NetRootExtension. One NetRootExtensions is used for a single
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| 129 | * remote path and reused by a few NetRoots, if they point to the same path.
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| 130 | *
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| 131 | * To simplify things we just set the type to DISK here (we do not support
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| 132 | * anything else anyway), and update the DeviceType correspondingly.
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| 133 | */
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| 134 | pNetRoot->Type = NET_ROOT_DISK;
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| 135 | pNetRoot->DeviceType = RxDeviceType(DISK);
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| 136 | break;
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| 137 | default:
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| 138 | AssertMsgFailed(("VBOXSF: VBoxUpdateNetRoot: Invalid net root type! Type = 0x%x\n", pNetRoot->Type));
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| 139 | break;
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| 140 | }
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| 141 |
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| 142 | Log(("VBOXSF: VBoxUpdateNetRoot: leaving pNetRoot->DeviceType = 0x%x\n", pNetRoot->DeviceType));
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| 143 | return STATUS_SUCCESS;
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| 144 | }
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| 145 |
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| 146 | NTSTATUS VBoxMRxCreateVNetRoot (IN PMRX_CREATENETROOT_CONTEXT pCreateNetRootContext)
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| 147 | /*++
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| 148 |
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| 149 | Routine Description:
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| 150 |
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| 151 | This routine patches the RDBSS created net root instance with the information required
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| 152 | by the mini redirector.
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| 153 |
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| 154 | Arguments:
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| 155 |
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| 156 | pVNetRoot - the virtual net root instance.
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| 157 |
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| 158 | pCreateNetRootContext - the net root context for calling back
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| 159 |
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| 160 | Return Value:
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| 161 |
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| 162 | NTSTATUS - The return status for the operation
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| 163 |
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| 164 | Notes:
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| 165 |
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| 166 | --*/
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| 167 | {
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| 168 | NTSTATUS Status;
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| 169 | PRX_CONTEXT pRxContext = pCreateNetRootContext->RxContext;
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| 170 | PMRX_V_NET_ROOT pVNetRoot = (PMRX_V_NET_ROOT)pCreateNetRootContext->pVNetRoot;
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| 171 | VBoxMRxGetDeviceExtension(pRxContext, pDeviceExtension);
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| 172 | VBoxMRxGetNetRootExtension(pVNetRoot->pNetRoot, pNetRootExtension);
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| 173 |
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| 174 | PMRX_NET_ROOT pNetRoot = pVNetRoot->pNetRoot;
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| 175 | PMRX_SRV_CALL pSrvCall = pNetRoot->pSrvCall;
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| 176 |
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| 177 | BOOLEAN fTreeConnectOpen = TRUE; // RxContext->Create.ThisIsATreeConnectOpen;
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| 178 | BOOLEAN fInitializeNetRoot = FALSE; //// !! Fix
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| 179 |
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| 180 | Log(("VBOXSF: VBoxMRxCreateVNetRoot: pNetRoot = %p, fTreeConnectOpen = %d\n", pNetRoot, pRxContext->Create.ThisIsATreeConnectOpen));
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| 181 |
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| 182 | /* IMPORTANT:
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| 183 | *
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| 184 | * This function must always call 'pCreateNetRootContext->Callback(pCreateNetRootContext)' before
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| 185 | * returning and then return STATUS_PENDING. Otherwise Win64 will hang.
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| 186 | */
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| 187 |
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| 188 | if (pNetRoot->Type == NET_ROOT_PIPE)
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| 189 | {
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| 190 | pNetRoot->Type = NET_ROOT_WILD;
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| 191 | }
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| 192 |
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| 193 |
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| 194 | if (pNetRoot->Type == NET_ROOT_MAILSLOT)
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| 195 | {
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| 196 |
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| 197 | /* DDK sample returns this status code. And our driver does get such NetRoots. */
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| 198 | Log(("VBOXSF: VBoxMRxCreateVNetRoot: Mailslot or Pipe open (%d) not supported!\n", pNetRoot->Type));
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| 199 |
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| 200 | pVNetRoot->Context = NULL;
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| 201 |
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| 202 | Status = STATUS_NOT_SUPPORTED;
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| 203 | goto l_Exit;
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| 204 | }
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| 205 |
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| 206 |
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| 207 | // The V_NET_ROOT is associated with a NET_ROOT. The two cases of interest are as
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| 208 | // follows
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| 209 | // 1) the V_NET_ROOT and the associated NET_ROOT are being newly created.
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| 210 | // 2) a new V_NET_ROOT associated with an existing NET_ROOT is being created.
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| 211 | //
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| 212 | // These two cases can be distinguished by checking if the context associated with
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| 213 | // NET_ROOT is NULL. Since the construction of NET_ROOT's/V_NET_ROOT's are serialized
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| 214 | // by the wrapper this is a safe check.
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| 215 | // ( The wrapper cannot have more then one thread trying to initialize the same
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| 216 | // NET_ROOT).
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| 217 | //
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| 218 | // The above is not really true in our case. Since we have asked the wrapper,
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| 219 | // to manage our netroot extension, the netroot context will always be non-NULL.
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| 220 | // We will distinguish the cases by checking our root state in the context...
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| 221 | //
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| 222 |
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| 223 | if (pNetRoot->Context == NULL)
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| 224 | {
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| 225 | fInitializeNetRoot = TRUE;
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| 226 | }
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| 227 | else
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| 228 | {
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| 229 | VBoxMRxGetNetRootExtension(pNetRoot,pNetRootExtension);
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| 230 | /* Detect an already initialized NetRoot.
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| 231 | * pNetRootExtension is actually the pNetRoot->Context and it is not null.
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| 232 | */
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| 233 | fInitializeNetRoot = pNetRootExtension->phgcmClient == NULL;
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| 234 | }
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| 235 |
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| 236 | Assert((NodeType(pNetRoot) == RDBSS_NTC_NETROOT) && (NodeType(pNetRoot->pSrvCall) == RDBSS_NTC_SRVCALL));
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| 237 |
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| 238 | Status = STATUS_SUCCESS;
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| 239 |
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| 240 | // update the net root state to be good.
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| 241 |
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| 242 | if (fInitializeNetRoot)
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| 243 | {
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| 244 | PWCHAR pRootName;
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| 245 | ULONG RootNameLength;
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| 246 | int vboxRC;
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| 247 | PSHFLSTRING ParsedPath = 0;
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| 248 | ULONG ParsedPathSize;
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| 249 |
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| 250 | pNetRoot->MRxNetRootState = MRX_NET_ROOT_STATE_GOOD;
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| 251 |
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| 252 | // validate the fixed netroot name
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| 253 |
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| 254 | RootNameLength = pNetRoot->pNetRootName->Length - pSrvCall->pSrvCallName->Length;
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| 255 | if (!RootNameLength)
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| 256 | {
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| 257 | /* Refuse a netroot path with an empty shared folder name */
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| 258 | Log(("VBOXSF: VBoxMRxCreateVNetRoot: Invalid shared folder name! (length=0)\n"));
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| 259 | pNetRoot->MRxNetRootState = MRX_NET_ROOT_STATE_ERROR;
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| 260 |
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| 261 | Status = STATUS_BAD_NETWORK_NAME;
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| 262 | goto l_Exit;
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| 263 | }
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| 264 |
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| 265 | RootNameLength -= 2; /* remove leading backslash */
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| 266 |
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| 267 | pRootName = (PWCHAR)(pNetRoot->pNetRootName->Buffer + (pSrvCall->pSrvCallName->Length / sizeof(WCHAR)));
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| 268 | pRootName++; /* remove leading backslash */
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| 269 |
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| 270 | if (pNetRootExtension->phgcmClient == NULL)
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| 271 | {
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| 272 | Log(("VBOXSF: VBoxMRxCreateVNetRoot: Initialize netroot length = %d, name = %.*ls\n", RootNameLength, RootNameLength / sizeof(WCHAR), pRootName));
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| 273 |
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| 274 | /* Calculate length required for parsed path.
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| 275 | */
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| 276 | ParsedPathSize = sizeof(*ParsedPath) + RootNameLength + sizeof(WCHAR);
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| 277 |
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| 278 | ParsedPath = (PSHFLSTRING)vbsfAllocNonPagedMem(ParsedPathSize);
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| 279 | if (!ParsedPath)
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| 280 | {
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| 281 | Status = STATUS_INSUFFICIENT_RESOURCES;
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| 282 | goto l_Exit;
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| 283 | }
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| 284 | memset(ParsedPath, 0, ParsedPathSize);
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| 285 |
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| 286 | ShflStringInitBuffer(ParsedPath, ParsedPathSize - sizeof(SHFLSTRING));
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| 287 |
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| 288 | ParsedPath->u16Size = (uint16_t)RootNameLength + sizeof(WCHAR);
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| 289 | ParsedPath->u16Length = ParsedPath->u16Size - sizeof(WCHAR); /* without terminating null */
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| 290 | RtlCopyMemory(ParsedPath->String.ucs2, pRootName, ParsedPath->u16Length);
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| 291 |
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| 292 | vboxRC = vboxCallMapFolder(&pDeviceExtension->hgcmClient, ParsedPath, &pNetRootExtension->map);
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| 293 | vbsfFreeNonPagedMem(ParsedPath);
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| 294 | if (vboxRC != VINF_SUCCESS)
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| 295 | {
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| 296 | Log(("VBOXSF: VBoxMRxCreateVNetRoot: vboxCallMapFolder failed with %d\n", vboxRC));
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| 297 | Status = STATUS_BAD_NETWORK_NAME;
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| 298 | }
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| 299 | else
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| 300 | {
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| 301 | Status = STATUS_SUCCESS;
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| 302 | pNetRootExtension->phgcmClient = &pDeviceExtension->hgcmClient;
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| 303 | }
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| 304 | }
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| 305 | }
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| 306 | else Log(("VBOXSF: VBoxMRxCreateVNetRoot: Creating V_NET_ROOT on existing NET_ROOT!\n"));
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| 307 |
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| 308 | if ((Status == STATUS_SUCCESS) && fInitializeNetRoot)
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| 309 | {
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| 310 | //
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| 311 | // A new NET_ROOT and associated V_NET_ROOT are being created !
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| 312 | //
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| 313 | Status = VBoxMRxInitializeNetRootEntry(pNetRoot);
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| 314 | Log(("VBOXSF: VBoxMRxCreateVNetRoot: NulMRXInitializeNetRootEntry called, Status = 0x%lx\n", Status));
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| 315 | }
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| 316 |
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| 317 | VBoxUpdateNetRoot(pNetRoot);
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| 318 |
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| 319 | l_Exit:
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| 320 | if (Status != STATUS_PENDING)
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| 321 | {
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| 322 | Log(("VBOXSF: VBoxMRxCreateVNetRoot: Returning 0x%lx\n", Status));
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| 323 | pCreateNetRootContext->VirtualNetRootStatus = Status;
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| 324 | if (fInitializeNetRoot)
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| 325 | pCreateNetRootContext->NetRootStatus = Status;
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| 326 | else pCreateNetRootContext->NetRootStatus = Status;
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| 327 |
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| 328 | // Callback the RDBSS for resumption.
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| 329 | pCreateNetRootContext->Callback(pCreateNetRootContext);
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| 330 |
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| 331 | // Map the error code to STATUS_PENDING since this triggers
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| 332 | // the synchronization mechanism in the RDBSS.
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| 333 | Status = STATUS_PENDING;
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| 334 | }
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| 335 |
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| 336 | Log(("VBOXSF: VBoxMRxCreateVNetRoot: Returned STATUS_PENDING\n"));
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| 337 | return Status;
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| 338 | }
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| 339 |
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| 340 | NTSTATUS VBoxMRxFinalizeVNetRoot (IN PMRX_V_NET_ROOT pVNetRoot, IN PBOOLEAN ForceDisconnect)
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| 341 | /*++
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| 342 |
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| 343 | Routine Description:
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| 344 |
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| 345 |
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| 346 | Arguments:
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| 347 |
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| 348 | pVNetRoot - the virtual net root
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| 349 |
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| 350 | ForceDisconnect - disconnect is forced
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| 351 |
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| 352 | Return Value:
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| 353 |
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| 354 | NTSTATUS - The return status for the operation
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| 355 |
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| 356 | --*/
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| 357 | {
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| 358 | NTSTATUS Status = STATUS_SUCCESS;
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| 359 | PMRX_NET_ROOT pNetRoot = pVNetRoot->pNetRoot;
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| 360 | VBoxMRxGetNetRootExtension(pVNetRoot->pNetRoot, pNetRootExtension);
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| 361 | int vboxRC;
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| 362 |
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| 363 | Log(("VBOXSF: VBoxMRxFinalizeVNetRoot: Address = 0x%lx\n", pVNetRoot));
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| 364 |
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| 365 | if (pNetRootExtension->phgcmClient)
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| 366 | {
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| 367 | vboxRC = vboxCallUnmapFolder(pNetRootExtension->phgcmClient, &pNetRootExtension->map);
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| 368 | if (vboxRC != VINF_SUCCESS)
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| 369 | {
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| 370 | Log(("VBOXSF: VBoxMRxFinalizeVNetRoot: vboxCallMapFolder failed with %d\n", vboxRC));
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| 371 | }
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| 372 | pNetRootExtension->phgcmClient = NULL;
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| 373 | }
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| 374 |
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| 375 | //
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| 376 | // This is called when all outstanding handles on this
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| 377 | // root have been cleaned up ! We can now zap the netroot
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| 378 | // extension...
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| 379 | //
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| 380 |
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| 381 | return Status;
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| 382 | }
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| 383 |
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| 384 | NTSTATUS VBoxMRxFinalizeNetRoot (IN PMRX_NET_ROOT pNetRoot, IN PBOOLEAN ForceDisconnect)
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| 385 | /*++
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| 386 |
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| 387 | Routine Description:
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| 388 |
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| 389 |
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| 390 | Arguments:
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| 391 |
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| 392 | pVirtualNetRoot - the virtual net root
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| 393 |
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| 394 | ForceDisconnect - disconnect is forced
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| 395 |
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| 396 | Return Value:
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| 397 |
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| 398 | NTSTATUS - The return status for the operation
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| 399 |
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| 400 | --*/
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| 401 | {
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| 402 | NTSTATUS Status = STATUS_SUCCESS;
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| 403 |
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| 404 | Log(("VBOXSF: VBoxMRxFinalizeNetRoot: Called.\n"));
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| 405 | //
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| 406 | // This is called when all outstanding handles on this
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| 407 | // root have been cleaned up ! We can now zap the netroot
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| 408 | // extension...
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| 409 | //
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| 410 | return (Status);
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| 411 | }
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| 412 |
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| 413 | VOID VBoxMRxExtractNetRootName (IN PUNICODE_STRING FilePathName, IN PMRX_SRV_CALL SrvCall, OUT PUNICODE_STRING NetRootName, OUT PUNICODE_STRING RestOfName OPTIONAL
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| 414 | )
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| 415 | /*++
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| 416 |
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| 417 | Routine Description:
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| 418 |
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| 419 | This routine parses the input name into srv, netroot, and the
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| 420 | rest.
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| 421 |
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| 422 | Arguments:
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| 423 |
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| 424 |
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| 425 | --*/
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| 426 | {
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| 427 | UNICODE_STRING xRestOfName;
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| 428 |
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| 429 | ULONG length = FilePathName->Length;
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| 430 | PWCH w = FilePathName->Buffer;
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| 431 | PWCH wlimit = (PWCH)(((PCHAR)w) + length);
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| 432 | PWCH wlow;
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| 433 |
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| 434 | Log(("VBOXSF: VBoxMRxExtractNetRootName: Called.\n"));
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| 435 |
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| 436 | w += (SrvCall->pSrvCallName->Length / sizeof(WCHAR));
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| 437 | NetRootName->Buffer = wlow = w;
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| 438 | for (;;)
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| 439 | {
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| 440 | if (w >= wlimit)
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| 441 | break;
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| 442 | if ((*w == OBJ_NAME_PATH_SEPARATOR) && (w != wlow))
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| 443 | {
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| 444 | break;
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| 445 | }
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| 446 | w++;
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| 447 | }
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| 448 |
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| 449 | NetRootName->Length = NetRootName->MaximumLength = (USHORT)((PCHAR)w - (PCHAR)wlow);
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| 450 |
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| 451 | //w = FilePathName->Buffer;
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| 452 | //NetRootName->Buffer = w++;
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| 453 |
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| 454 | if (!RestOfName)
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| 455 | RestOfName = &xRestOfName;
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| 456 | RestOfName->Buffer = w;
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| 457 | RestOfName->Length = (USHORT)RestOfName->MaximumLength = (USHORT)((PCHAR)wlimit - (PCHAR)w);
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| 458 |
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| 459 | Log(("VBOXSF: VBoxMRxExtractNetRootName: FilePath = %.*ls\n", FilePathName->Length / sizeof(WCHAR), FilePathName->Buffer));
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| 460 | Log(("VBOXSF: VBoxMRxExtractNetRootName: Srv = %.*ls, Root = %.*ls, Rest = %.*ls\n", SrvCall->pSrvCallName->Length / sizeof(WCHAR), SrvCall->pSrvCallName->Buffer, NetRootName->Length
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| 461 | / sizeof(WCHAR), NetRootName->Buffer, RestOfName->Length / sizeof(WCHAR), RestOfName->Buffer));
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| 462 |
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| 463 | return;
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| 464 | }
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| 465 |
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