451 lines
12 KiB
C++
451 lines
12 KiB
C++
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#include "globals.h"
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#include "line.h"
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#include "config.h"
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#define H323_VERSION_LO 0x00000000
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#define H323_VERSION_HI 0x00000000
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#define TSPI_VERSION_LO 0x00030000
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#define TSPI_VERSION_HI TAPI_CURRENT_VERSION
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//
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// Global variables
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//
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HINSTANCE g_hInstance;
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WCHAR g_pwszProviderInfo[64];
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WCHAR g_pwszLineName[16];
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DWORD g_dwTSPIVersion;
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//
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// Private procedures
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//
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/*++
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Routine Description:
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This function determines whether or not specified TSPI version is
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supported by the service provider.
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Arguments:
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dwLowVersion - Specifies the lowest TSPI version number under which the
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TAPI DLL is willing to operate. The most-significant WORD is the
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major version number and the least-significant WORD is the minor
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version number.
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dwHighVersion - Specifies the highest TSPI version number under which
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the TAPI DLL is willing to operate. The most-significant WORD is the
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major version number and the least-significant WORD is the minor
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version number.
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pdwTSPIVersion - Specifies a far pointer to a DWORD. The service
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provider fills this location with the highest TSPI version number,
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within the range requested by the caller, under which the service
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provider is willing to operate. The most-significant WORD is the
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major version number and the least-significant WORD is the minor
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version number.
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Return Values:
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Returns true if successful.
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--*/
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BOOL
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H323NegotiateTSPIVersion(
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IN DWORD dwLowVersion,
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IN DWORD dwHighVersion,
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OUT PDWORD pdwTSPIVersion
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)
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{
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// validate extension version range
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if ((TSPI_VERSION_HI <= dwHighVersion) &&
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(TSPI_VERSION_HI >= dwLowVersion))
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{
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// save negotiated version
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*pdwTSPIVersion = TSPI_VERSION_HI;
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// success
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return TRUE;
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}
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else if( (dwHighVersion <= TSPI_VERSION_HI) &&
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(dwHighVersion >= TSPI_VERSION_LO) )
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{
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// save negotiated version
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*pdwTSPIVersion = dwHighVersion;
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// success
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return TRUE;
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}
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H323DBG(( DEBUG_LEVEL_FORCE, "TSPI version (%08XH:%08XH) rejected.",
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dwHighVersion, dwLowVersion ));
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// failure
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return FALSE;
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}
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//
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// Public procedures
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//
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/*++
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Routine Description:
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This function determines whether or not specified TSPI version is
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supported by the service provider.
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Arguments:
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dwTSPIVersion - Specifies the TSPI version to validate.
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Return Values:
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Returns true if successful.
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--*/
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BOOL
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H323ValidateTSPIVersion(
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IN DWORD dwTSPIVersion
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)
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{
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// see if specified version is supported
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if ((dwTSPIVersion >= TSPI_VERSION_LO) &&
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(dwTSPIVersion <= TSPI_VERSION_HI)) {
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// success
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return TRUE;
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}
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H323DBG((DEBUG_LEVEL_FORCE, "do not support TSPI version %08XH.",
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dwTSPIVersion));
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// failure
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return FALSE;
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}
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/*++
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Routine Description:
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This function determines whether or not specified extension version is
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supported by the service provider.
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Arguments:
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dwExtVersion - Specifies the extension version to validate.
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Return Values:
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Returns true if successful.
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--*/
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BOOL
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H323ValidateExtVersion(
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IN DWORD dwExtVersion
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)
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{
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// no device specific extension
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if (dwExtVersion == H323_VERSION_HI) {
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// success
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return TRUE;
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}
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H323DBG((
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DEBUG_LEVEL_ERROR,
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"do not support extension version %d.%d.",
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HIWORD(dwExtVersion),
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LOWORD(dwExtVersion)
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));
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// failure
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return FALSE;
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}
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//
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// TSPI procedures
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//
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/*++
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Routine Description:
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This function returns the highest SPI version the Service Provider is
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willing to operate under for this device given the range of possible
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SPI versions.
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The TAPI DLL typically calls this function early in the initialization
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sequence for each line device. In addition, it calls this with the
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value INITIALIZE_NEGOTIATION for dwDeviceID to negotiate an interface
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version for calling early initialization functions.
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Note that when dwDeviceID is INITIALIZE_NEGOTIATION, this function must
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not return LINEERR_OPERATIONUNAVAIL, since this function (with that value)
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is mandatory for negotiating the overall interface version even if the
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service provider supports no line devices.
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Negotiation of an Extension version is done through the separate
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procedure TSPI_lineNegotiateExtVersion.
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Arguments:
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dwDeviceID - Identifies the line device for which interface version
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negotiation is to be performed. In addition to device IDs within
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the range the Service Provider supports, this may be the value:
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INITIALIZE_NEGOTIATION - This value is used to signify that an overall
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interface version is to be negotiated. Such an interface version
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is required for functions that can be called early in the
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initialization sequence, i.e., before the device ID range has
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been set.
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dwLowVersion - Specifies the lowest TSPI version number under which the
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TAPI DLL is willing to operate. The most-significant WORD is the
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major version number and the least-significant WORD is the minor
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version number.
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dwHighVersion - Specifies the highest TSPI version number under which
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the TAPI DLL is willing to operate. The most-significant WORD is the
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major version number and the least-significant WORD is the minor
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version number.
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pdwTSPIVersion - Specifies a far pointer to a DWORD. The service
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provider fills this location with the highest TSPI version number,
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within the range requested by the caller, under which the service
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provider is willing to operate. The most-significant WORD is the
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major version number and the least-significant WORD is the minor
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version number. If the requested range does not overlap the range
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supported by the service provider, the function returns
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LINEERR_INCOMPATIBLEAPIVERSION.
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Return Values:
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Returns zero if the function is successful, or a negative error number
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if an error has occurred. Possible return values are as follows:
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LINEERR_BADDEVICEID - The specified device identifier or line device
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identifier (such as in a dwDeviceID parameter) is invalid or
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out of range.
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LINEERR_INCOMPATIBLEAPIVERSION - The application requested an API
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version or version range that is either incompatible or cannot
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be supported by the Telephony API implementation and/or
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corresponding service provider.
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LINEERR_OPERATIONFAILED - The operation failed for an unspecified
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or unknown reason.
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--*/
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LONG
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TSPIAPI
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TSPI_lineNegotiateTSPIVersion(
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DWORD dwDeviceID,
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DWORD dwLowVersion,
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DWORD dwHighVersion,
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PDWORD pdwTSPIVersion
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)
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{
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DWORD dwTSPIVersion;
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H323DBG(( DEBUG_LEVEL_TRACE, "TSPI_lineNegotiateTSPIVer - Entered." ));
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// see if this is a init line device
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if ((DWORD_PTR)dwDeviceID == INITIALIZE_NEGOTIATION)
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{
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H323DBG(( DEBUG_LEVEL_VERBOSE,
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"tapisrv supports tspi version %d.%d through %d.%d.",
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HIWORD(dwLowVersion),
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LOWORD(dwLowVersion),
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HIWORD(dwHighVersion),
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LOWORD(dwHighVersion)
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));
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// perform version negotiation
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if (!H323NegotiateTSPIVersion(
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dwLowVersion,
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dwHighVersion,
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&dwTSPIVersion))
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{
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H323DBG(( DEBUG_LEVEL_TRACE, "TSPI_lineNegotiateTSPIVer - bad version." ));
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// negotiated version not agreed upon
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return LINEERR_INCOMPATIBLEAPIVERSION;
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}
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// see if this is a valid line device
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}
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else if( g_pH323Line -> GetDeviceID() == (DWORD)dwDeviceID )
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{
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// perform version negotiation
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if (!H323NegotiateTSPIVersion(
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dwLowVersion,
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dwHighVersion,
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&dwTSPIVersion))
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{
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H323DBG(( DEBUG_LEVEL_TRACE, "TSPI_lineNegotiateTSPIVer - incompat ver." ));
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// negotiated version not agreed upon
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return LINEERR_INCOMPATIBLEAPIVERSION;
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}
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}
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else
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{
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H323DBG(( DEBUG_LEVEL_TRACE, "TSPI_lineNegotiateTSPIVer - bad device id:%d:%d.",
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g_pH323Line -> GetDeviceID(), dwDeviceID));
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// do not recognize device
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return LINEERR_BADDEVICEID;
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}
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// return negotiated version
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*pdwTSPIVersion = dwTSPIVersion;
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g_dwTSPIVersion = dwTSPIVersion;
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H323DBG(( DEBUG_LEVEL_TRACE, "TSPI_lineNegotiateTSPIVer - Exited." ));
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// success
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return NOERROR;
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}
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/*++
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Routine Description:
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Loads strings from resource table.
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Arguments:
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None.
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Return Values:
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Returns true if successful.
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--*/
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BOOL
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H323LoadStrings(
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)
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{
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DWORD dwNumBytes;
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DWORD dwNumChars;
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WCHAR wszBuffer[256];
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// load string into buffer
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dwNumChars = LoadStringW(
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g_hInstance,
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IDS_LINENAME,
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g_pwszLineName,
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sizeof(g_pwszLineName)/sizeof(WCHAR)
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);
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if( dwNumChars == 0 )
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return FALSE;
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// load string into buffer
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dwNumChars = LoadStringW(
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g_hInstance,
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IDS_PROVIDERNAME,
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g_pwszProviderInfo,
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sizeof(g_pwszProviderInfo)/sizeof(WCHAR)
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);
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if( dwNumChars == 0 )
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return FALSE;
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// success
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return TRUE;
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}
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//
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// Public Procedures
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//
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/*++
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Routine Description:
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Dll entry point.
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Arguments:
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Same as DllMain.
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Return Values:
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Returns true if successful.
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--*/
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BOOL
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WINAPI
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DllMain(
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PVOID DllHandle,
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ULONG Reason,
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LPVOID lpReserved
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)
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{
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BOOL fOk = TRUE;
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// check if new process attaching
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if (Reason == DLL_PROCESS_ATTACH)
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{
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g_RegistrySettings.dwLogLevel = DEBUG_LEVEL_FORCE;
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H323DBG ((DEBUG_LEVEL_FORCE, "DLL_PROCESS_ATTACH"));
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// store the handle into a global variable so that
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// the UI code can use it.
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g_hInstance = (HINSTANCE)DllHandle;
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// turn off thread attach messages
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DisableThreadLibraryCalls( g_hInstance );
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// start h323 tsp
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fOk = H323LoadStrings();
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// check if new process detaching
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}
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else if (Reason == DLL_PROCESS_DETACH)
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{
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H323DBG ((DEBUG_LEVEL_FORCE, "DLL_PROCESS_DETACH"));
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#if DBG
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TRACELogDeRegister();
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|
#else
|
||
|
|
CloseLogFile();
|
||
|
|
#endif
|
||
|
|
fOk = TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
return fOk;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|