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WindowsXP-SP1/com/ole32/dcomss/wrapper/epts.c
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/*++
Copyright (c) 1995 Microsoft Corporation
Module Name:
Epts.c
Abstract:
Common code to listen to endpoints in the DCOM service.
Author:
Mario Goertzel [MarioGo]
Revision History:
MarioGo 6/16/1995 Bits 'n pieces
Edwardr 7/17/1996 Added ncadg_mq
Edwardr 5/01/1997 Added ncacn_http
MazharM 10-12.98 Add pnp stuff
KamenM Oct 2000 Removed ncadg_mq
--*/
//#define NCADG_MQ_ON
//#define NETBIOS_ON
#if !defined(_M_IA64)
#define SPX_ON
#endif
//#define IPX_ON
#if !defined(SPX_ON) && !defined(IPX_ON)
#define SPX_IPX_OFF
#endif
#include <dcomss.h>
#include <winsvc.h>
#include <winsock2.h>
#if !defined(SPX_IPX_OFF)
#include <wsipx.h>
#include <svcguid.h>
#include "sap.h"
#endif
// Globals
#if !defined(SPX_IPX_OFF)
const IPX_BOGUS_NETWORK_NUMBER = 0xefcd3412;
BOOL gfDelayedAdvertiseSaps = FALSE;
typedef enum
{
SapStateUnknown,
SapStateNoServices,
SapStateEnabled,
SapStateDisabled
} SAP_STATE;
SAP_STATE SapState = SapStateUnknown;
#endif
enum RegistryState
{
RegStateUnknown,
RegStateMissing,
RegStateYes,
RegStateNo
} RegistryState = RegStateUnknown;
// Prototypes
#if !defined(SPX_IPX_OFF)
void AdvertiseNameWithSap(void);
void CallSetService( SOCKADDR_IPX * pipxaddr, BOOL fRegister );
#endif
//
// The index is the protseq tower id.
//
PROTSEQ_INFO
gaProtseqInfo[] =
{
/* 0x00 */ { STOPPED, 0, 0 },
/* 0x01 */ { STOPPED, 0, 0 },
/* 0x02 */ { STOPPED, 0, 0 },
/* 0x03 */ { STOPPED, 0, 0 },
/* 0x04 */ { STOPPED, L"ncacn_dnet_nsp", L"#69" },
/* 0x05 */ { STOPPED, 0, 0 },
/* 0x06 */ { STOPPED, 0, 0 },
/* 0x07 */ { STOPPED, L"ncacn_ip_tcp", L"135" },
/* 0x08 */ { STOPPED, L"ncadg_ip_udp", L"135" },
#ifdef NETBIOS_ON
/* 0x09 */ { STOPPED, L"ncacn_nb_tcp", L"135" },
#else
/* 0x09 */ { STOPPED, 0, 0 },
#endif
/* 0x0a */ { STOPPED, 0, 0 },
/* 0x0b */ { STOPPED, 0, 0 },
#if defined(SPX_ON)
/* 0x0c */ { STOPPED, L"ncacn_spx", L"34280" },
#else
/* 0x0c */ { STOPPED, 0, 0 },
#endif
#ifdef NETBIOS_ON
/* 0x0d */ { STOPPED, L"ncacn_nb_ipx", L"135" },
#else
/* 0x0d */ { STOPPED, 0, 0 },
#endif
/* 0x0e */ { STOPPED, L"ncadg_ipx", L"34280" },
/* 0x0f */ { STOPPED, L"ncacn_np", L"\\pipe\\epmapper" },
/* 0x10 */ { STOPPED, L"ncalrpc", L"epmapper" },
/* 0x11 */ { STOPPED, 0, 0 },
/* 0x12 */ { STOPPED, 0, 0 },
#ifdef NETBIOS_ON
/* 0x13 */ { STOPPED, L"ncacn_nb_nb", L"135" },
#else
/* 0x13 */ { STOPPED, 0, 0 },
#endif
/* 0x14 */ { STOPPED, 0, 0 },
/* 0x15 */ { STOPPED, 0, 0 }, // was ncacn_nb_xns - unsupported.
/* 0x16 */ { STOPPED, L"ncacn_at_dsp", L"Endpoint Mapper" },
/* 0x17 */ { STOPPED, L"ncadg_at_ddp", L"Endpoint Mapper" },
/* 0x18 */ { STOPPED, 0, 0 },
/* 0x19 */ { STOPPED, 0, 0 },
/* 0x1A */ { STOPPED, 0, 0 },
/* 0x1B */ { STOPPED, 0, 0 },
/* 0x1C */ { STOPPED, 0, 0 },
#ifdef NCADG_MQ_ON
/* 0x1D */ { STOPPED, L"ncadg_mq", L"EpMapper"},
#else
/* 0x1D */ { STOPPED, 0, 0 },
#endif
/* 0x1E */ { STOPPED, 0, 0 },
/* 0x1F */ { STOPPED, L"ncacn_http", L"593" }, // dcomhttp port assigned by IANA
/* 0x20 */ { STOPPED, 0, 0 },
};
#define PROTSEQ_IDS (sizeof(gaProtseqInfo)/sizeof(PROTSEQ_INFO))
#define ID_LPC (0x10)
#define ID_IPX (0x0E)
#if defined(SPX_ON)
#define ID_SPX (0x0C)
#endif
#define ID_HTTP (0x1F)
BOOL fListenOnInternet = TRUE; // see bug 69332 (in old nt raid db)
BOOL
CreateSids(
PSID* ppsidBuiltInAdministrators,
PSID* ppsidSystem,
PSID* ppsidWorld
)
/*++
Routine Description:
Creates and return pointers to three SIDs one for each of World,
Local Administrators, and System.
Arguments:
ppsidBuiltInAdministrators - Receives pointer to SID representing local
administrators;
ppsidSystem - Receives pointer to SID representing System;
ppsidWorld - Receives pointer to SID representing World.
Return Value:
BOOL indicating success (TRUE) or failure (FALSE).
Caller must free returned SIDs by calling FreeSid() for each returned
SID when this function return TRUE; pointers should be assumed garbage
when the function returns FALSE.
--*/
{
//
// An SID is built from an Identifier Authority and a set of Relative IDs
// (RIDs). The Authority of interest to us SECURITY_NT_AUTHORITY.
//
SID_IDENTIFIER_AUTHORITY NtAuthority = SECURITY_NT_AUTHORITY;
SID_IDENTIFIER_AUTHORITY WorldAuthority = SECURITY_WORLD_SID_AUTHORITY;
//
// Each RID represents a sub-unit of the authority. Local
// Administrators is in the "built in" domain. The other SIDs, for
// Authenticated users and system, is based directly off of the
// authority.
//
// For examples of other useful SIDs consult the list in
// \nt\public\sdk\inc\ntseapi.h.
//
if (!AllocateAndInitializeSid(&NtAuthority,
2, // 2 sub-authorities
SECURITY_BUILTIN_DOMAIN_RID,
DOMAIN_ALIAS_RID_ADMINS,
0,0,0,0,0,0,
ppsidBuiltInAdministrators)) {
// error
} else if (!AllocateAndInitializeSid(&NtAuthority,
1, // 1 sub-authorities
SECURITY_LOCAL_SYSTEM_RID,
0,0,0,0,0,0,0,
ppsidSystem)) {
// error
FreeSid(*ppsidBuiltInAdministrators);
*ppsidBuiltInAdministrators = NULL;
} else if (!AllocateAndInitializeSid(&WorldAuthority,
1, // 1 sub-authority
SECURITY_WORLD_RID,
0,0,0,0,0,0,0,
ppsidWorld)) {
// error
FreeSid(*ppsidBuiltInAdministrators);
*ppsidBuiltInAdministrators = NULL;
FreeSid(*ppsidSystem);
*ppsidSystem = NULL;
} else {
return TRUE;
}
return FALSE;
}
PSECURITY_DESCRIPTOR
CreateSd(
VOID
)
/*++
Routine Description:
Creates and return a SECURITY_DESCRIPTOR with a DACL granting
(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | SYNCHRONIZE) to World,
and GENERIC_ALL to Local Administrators and System.
Arguments:
None
Return Value:
Pointer to the created SECURITY_DESCRIPTOR, or NULL if an error occurred.
Caller must free returned SECURITY_DESCRIPTOR back to process heap by
a call to HeapFree.
--*/
{
PSID psidWorld;
PSID psidBuiltInAdministrators;
PSID psidSystem;
if (!CreateSids(&psidBuiltInAdministrators,
&psidSystem,
&psidWorld)) {
// error
} else {
//
// Calculate the size of and allocate a buffer for the DACL, we need
// this value independently of the total alloc size for ACL init.
//
PSECURITY_DESCRIPTOR Sd = NULL;
ULONG AclSize;
//
// "- sizeof (ULONG)" represents the SidStart field of the
// ACCESS_ALLOWED_ACE. Since we're adding the entire length of the
// SID, this field is counted twice.
//
AclSize = sizeof (ACL) +
(3 * (sizeof (ACCESS_ALLOWED_ACE) - sizeof (ULONG))) +
GetLengthSid(psidWorld) +
GetLengthSid(psidBuiltInAdministrators) +
GetLengthSid(psidSystem);
Sd = HeapAlloc(GetProcessHeap(),
0,
SECURITY_DESCRIPTOR_MIN_LENGTH + AclSize);
if (!Sd) {
// error
} else {
ACL *Acl;
Acl = (ACL *)((BYTE *)Sd + SECURITY_DESCRIPTOR_MIN_LENGTH);
if (!InitializeAcl(Acl,
AclSize,
ACL_REVISION)) {
// error
} else if (!AddAccessAllowedAce(Acl,
ACL_REVISION,
SYNCHRONIZE | GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE,
psidWorld)) {
// Failed to build the ACE granting "WORLD"
// (SYNCHRONIZE | GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE) access.
} else if (!AddAccessAllowedAce(Acl,
ACL_REVISION,
GENERIC_ALL,
psidBuiltInAdministrators)) {
// Failed to build the ACE granting "Built-in Administrators"
// (GENERIC_ALL) access.
} else if (!AddAccessAllowedAce(Acl,
ACL_REVISION,
GENERIC_ALL,
psidSystem)) {
// Failed to build the ACE granting "System"
// GENERIC_ALL access.
} else if (!InitializeSecurityDescriptor(Sd,
SECURITY_DESCRIPTOR_REVISION)) {
// error
} else if (!SetSecurityDescriptorDacl(Sd,
TRUE,
Acl,
FALSE)) {
// error
} else {
FreeSid(psidWorld);
FreeSid(psidBuiltInAdministrators);
FreeSid(psidSystem);
return Sd;
}
HeapFree(GetProcessHeap(),
0,
Sd);
}
FreeSid(psidWorld);
FreeSid(psidBuiltInAdministrators);
FreeSid(psidSystem);
}
return NULL;
}
RPC_STATUS
UseProtseqIfNecessary(
IN USHORT id
)
/*++
Routine Description:
Listens to the well known RPC endpoint mapper endpoint
for the protseq. Returns very quickly if the process
is already listening to the protseq.
Arguments:
id - the tower id of protseq. See GetProtseqId() if you don't
already have this value.
Return Value:
RPC_S_OK - no errors occured.
RPC_S_OUT_OF_RESOURCES - when we're unable to setup security for the endpoint.
RPC_S_INVALID_RPC_PROTSEQ - if id is unknown/invalid.
Any error from RpcServerUseProtseqEp.
--*/
{
RPC_STATUS status = RPC_S_OK;
SECURITY_DESCRIPTOR *psd = NULL;
RPC_POLICY Policy;
Policy.Length = sizeof(RPC_POLICY);
Policy.EndpointFlags = 0;
if (fListenOnInternet)
{
Policy.NICFlags = RPC_C_BIND_TO_ALL_NICS;
}
else
{
Policy.NICFlags = 0;
}
ASSERT(id);
if (id == 0 || id >= PROTSEQ_IDS)
{
ASSERT(0);
return(RPC_S_INVALID_RPC_PROTSEQ);
}
if (gaProtseqInfo[id].state == STARTED)
{
return(RPC_S_OK);
}
if (id == ID_LPC)
{
// ncalrpc needs a security descriptor.
psd = CreateSd();
if ( NULL == psd )
{
status = RPC_S_OUT_OF_RESOURCES;
}
}
else
{
psd = NULL;
}
if (status == RPC_S_OK )
{
status = RpcServerUseProtseqEpEx(gaProtseqInfo[id].pwstrProtseq,
RPC_C_PROTSEQ_MAX_REQS_DEFAULT + 40,
gaProtseqInfo[id].pwstrEndpoint,
psd,
&Policy);
if ( NULL != psd )
{
HeapFree(GetProcessHeap(),
0,
psd);
psd = NULL;
}
// No locking is done here, the RPC runtime may return duplicate
// endpoint if two threads call this at the same time.
if (status == RPC_S_DUPLICATE_ENDPOINT)
{
status = RPC_S_OK;
}
#ifdef DEBUGRPC
if (status != RPC_S_OK)
{
KdPrintEx((DPFLTR_DCOMSS_ID,
DPFLTR_WARNING_LEVEL,
"DCOMSS: Unable to listen to %S (0x%x)\n",
gaProtseqInfo[id].pwstrProtseq,
status));
}
#endif
if (status == RPC_S_OK)
{
gaProtseqInfo[id].state = STARTED;
#if !defined(SPX_IPX_OFF)
if (
#if defined(IPX_ON)
(id == ID_IPX)
||
#endif
#if defined(SPX_ON)
(id == ID_SPX)
#endif
)
{
UpdateSap(SAP_CTRL_MAYBE_REGISTER);
}
#endif
}
}
return(status);
}
PWSTR
GetProtseq(
IN USHORT ProtseqId
)
/*++
Routine Description:
Returns the unicode protseq give the protseqs tower id.
Arguments:
ProtseqId - Tower id of the protseq in question.
Return Value:
NULL if the id is invalid.
non-NULL if the id is valid - note the pointer doesn't need to be freed.
--*/
{
ASSERT(ProtseqId);
if (ProtseqId < PROTSEQ_IDS)
{
return(gaProtseqInfo[ProtseqId].pwstrProtseq);
}
return(0);
}
PWSTR
GetEndpoint(
IN USHORT ProtseqId
)
/*++
Routine Description:
Returns the well known endpoint associated with the protseq.
Arguments:
ProtseqId - the id (See GetProtseqId()) of the protseq in question.
Return Value:
0 - Unknown/invalid id.
!0 - The endpoint associated with the protseq.
note: should not be freed.
--*/
{
ASSERT(ProtseqId);
if (ProtseqId < PROTSEQ_IDS)
{
return(gaProtseqInfo[ProtseqId].pwstrEndpoint);
}
return(0);
}
USHORT
GetProtseqId(
IN PWSTR Protseq
)
/*++
Routine Description:
Returns the tower id for a protseq.
This could be changed to a faster search, but remember that
eventually the table will NOT be static. (ie. we can't just
create a perfect hash based on the static table).
Arguments:
Protseq - a unicode protseq to lookup. It is assumed
to be non-null.
Return Value:
0 - unknown/invalid protseq
non-zero - the id.
--*/
{
int i;
ASSERT(Protseq);
for(i = 1; i < PROTSEQ_IDS; i++)
{
if ( 0 != gaProtseqInfo[i].pwstrProtseq
&& 0 == lstrcmpW(gaProtseqInfo[i].pwstrProtseq, Protseq))
{
return((USHORT)i);
}
}
return(0);
}
USHORT
GetProtseqIdAnsi(
IN PSTR pstrProtseq
)
/*++
Routine Description:
Returns the tower id for a protseq.
This could be changed to a faster search, but remember that
eventually the table will NOT be static. (ie. we can't just
create a perfect hash based on the static table).
Arguments:
Protseq - an ansi (8 bit char) protseq to lookup. It is assumed
to be non-null.
Return Value:
0 - unknown/invalid protseq
non-zero - the id.
--*/
{
int i;
ASSERT(pstrProtseq);
for(i = 1; i < PROTSEQ_IDS; i++)
{
if (0 != gaProtseqInfo[i].pwstrProtseq)
{
PWSTR pwstrProtseq = gaProtseqInfo[i].pwstrProtseq;
PSTR pstrT = pstrProtseq;
while(*pstrT && *pwstrProtseq && *pstrT == *pwstrProtseq)
{
pstrT++;
pwstrProtseq++;
}
if (*pstrT == *pwstrProtseq)
{
return((USHORT)i);
}
}
}
return(0);
}
const PWSTR NICConfigKey = L"System\\CurrentControlSet\\Services\\RpcSs";
const PWSTR ListenOnInternet = L"ListenOnInternet";
RPC_STATUS
InitializeEndpointManager(
VOID
)
/*++
Routine Description:
Called when the dcom service starts.
Arguments:
None
Return Value:
RPC_S_OUT_OF_MEMORY - if needed
RPC_S_OUT_OF_RESOURCES - usually on registry failures.
--*/
{
HKEY hkey;
DWORD size, type, value;
RPC_STATUS status;
status = RegOpenKeyExW(HKEY_LOCAL_MACHINE,
(PWSTR)NICConfigKey,
0,
KEY_READ,
&hkey);
if (status != RPC_S_OK)
{
ASSERT(status == ERROR_FILE_NOT_FOUND);
return(RPC_S_OK);
}
size = sizeof(value);
status = RegQueryValueExW(hkey,
(PWSTR)ListenOnInternet,
0,
&type,
(PBYTE)&value,
&size);
if ( status == RPC_S_OK )
{
if ((type != REG_SZ)
|| (*(PWSTR)&value != 'Y'
&& *(PWSTR)&value != 'y'
&& *(PWSTR)&value != 'N'
&& *(PWSTR)&value != 'n'))
{
goto Cleanup;
}
if (*(PWSTR)&value == 'Y'
|| *(PWSTR)&value == 'y')
{
fListenOnInternet = TRUE;
}
else
{
fListenOnInternet = FALSE;
}
}
Cleanup:
RegCloseKey(hkey);
return(RPC_S_OK);
}
BOOL
IsLocal(
IN USHORT ProtseqId
)
/*++
Routine Description:
Determines if the protseq id is local-only. (ncalrpc)
Arguments:
ProtseqId - The id of the protseq in question.
Return Value:
TRUE - if the protseq id is local-only
FALSE - if the protseq id invalid or available remotely.
--*/
{
return(ProtseqId == ID_LPC);
}
RPC_STATUS
DelayedUseProtseq(
IN USHORT id
)
/*++
Routine Description:
If the protseq is not being used its state is changed
so that a callto CompleteDelayedUseProtseqs() will actually
cause the server to listen to the protseq.
This is called when an RPC server registers an dynamic
endpoint on this protocol.
Arguments:
id - the id of the protseq you wish to listen to.
Return Value:
0 - normally
RPC_S_INVALID_RPC_PROTSEQ - if id is invalid.
--*/
{
#if !defined(SPX_IPX_OFF)
// For IPX and SPX
if (
#if defined(IPX_ON)
(id == ID_IPX)
||
#endif
#if defined(SPX_ON)
(id == ID_SPX)
#endif
)
{
gfDelayedAdvertiseSaps = TRUE;
}
#endif
if (id < PROTSEQ_IDS)
{
if (gaProtseqInfo[id].pwstrProtseq != 0)
{
if (gaProtseqInfo[id].state == STOPPED)
gaProtseqInfo[id].state = START;
return(RPC_S_OK);
}
}
return(RPC_S_INVALID_RPC_PROTSEQ);
}
VOID
CompleteDelayedUseProtseqs(
VOID
)
/*++
Routine Description:
Start listening to any protseqs previously passed
to DelayedUseProtseq(). No errors are returned,
but informationals are printed on debug builds.
Arguments:
None
Return Value:
None
--*/
{
USHORT i;
for(i = 1; i < PROTSEQ_IDS; i++)
{
if (START == gaProtseqInfo[i].state)
{
RPC_STATUS status = UseProtseqIfNecessary(i);
#ifdef DEBUGRPC
if (RPC_S_OK == status)
ASSERT(gaProtseqInfo[i].state == STARTED);
#endif
}
}
#if !defined(SPX_IPX_OFF)
if (gfDelayedAdvertiseSaps)
{
gfDelayedAdvertiseSaps = FALSE;
UpdateSap(SAP_CTRL_MAYBE_REGISTER);
}
#endif
}
#if !defined(SPX_IPX_OFF)
RPC_STATUS
ServiceInstalled(
PWSTR ServiceName
)
/*++
Routine Description:
Tests if a service is installed.
Arguments:
ServiceName - The unicode name (short or long) of the service
to check.
Return Value:
0 - service installed
ERROR_SERVICE_DOES_NOT_EXIST - service not installed
other - parameter or resource problem
--*/
{
SC_HANDLE ScHandle;
SC_HANDLE ServiceHandle;
ScHandle = OpenSCManagerW(0, 0, GENERIC_READ);
if (ScHandle == 0)
{
return(ERROR_SERVICE_DOES_NOT_EXIST);
}
ServiceHandle = OpenService(ScHandle, ServiceName, GENERIC_READ);
if (ServiceHandle == 0)
{
#if DBG
if (GetLastError() != ERROR_SERVICE_DOES_NOT_EXIST)
{
KdPrintEx((DPFLTR_DCOMSS_ID,
DPFLTR_WARNING_LEVEL,
"OR: Failed %d opening the %S service\n",
GetLastError(),
ServiceName));
}
#endif
CloseServiceHandle(ScHandle);
return(ERROR_SERVICE_DOES_NOT_EXIST);
}
// Service installed
CloseServiceHandle(ScHandle);
CloseServiceHandle(ServiceHandle);
return(RPC_S_OK);
}
const GUID RPC_SAP_SERVICE_TYPE = SVCID_NETWARE(0x640);
void
UpdateSap(
enum SAP_CONTROL_TYPE action
)
/*++
Routine Description:
Starts, stops, or updates the periodic SPX SAP broadcasts that allow an RPC
client to map the server name to an IPX address. To understand IPX and SAP,
read "IPX Router Specification", Novell part # 107-000029-001.
A SAP broadcast will be processed by several categories of machines
- all machines in the local subnet(s) will have to read and discard the packet
- routers connected to the local subnet(s) will add the data to the info they
periodically exchange with other routers
- Netware-compatible servers will add the info to their Bindery tables.
That is why not all NT machines should SAP.
Arguments:
action:
SAP_CTRL_FORCE_REGISTER: begin sapping
SAP_CTRL_MAYBE_REGISTER: begin sapping only if the Netware-compatible
workstation and/or the SAP Agent service is
installed. File/Print Svcs for Netware forces the
SAP Agent, so it too will enable sapping.
SAP_CTRL_UPDATE_ADDRESS: a net card was added or subtracted, or the network
address changed. Re-register if sapping is already
active.
SAP_CTRL_UNREGISTER: stop sapping
--*/
{
DWORD status;
HKEY hKey;
// Service paramaters
NT_PRODUCT_TYPE type;
if (RegistryState == RegStateUnknown)
{
// The registry key has absolute control of SAPing
status = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
TEXT("Software\\Microsoft\\Rpc"),
0,
KEY_READ,
&hKey);
if (status == ERROR_SUCCESS)
{
WCHAR pwstrValue[8];
DWORD dwType, dwLenBuffer;
dwLenBuffer = sizeof(pwstrValue);
status = RegQueryValueEx(hKey,
TEXT("AdvertiseRpcService"),
0,
&dwType,
(PBYTE)pwstrValue,
&dwLenBuffer
);
if ( status == ERROR_SUCCESS
&& dwType == REG_SZ)
{
if ( pwstrValue[0] == 'y'
|| pwstrValue[0] == 'Y' )
{
RegistryState = RegStateYes;
}
else if ( pwstrValue[0] == 'n'
|| pwstrValue[0] == 'N' )
{
RegistryState = RegStateNo;
}
else
{
// Value in the registry is wrong, pretend it doesn't exist.
RegistryState = RegStateMissing;
}
}
else
{
// Bad or missing value in the registry, pretend is doesn't exist.
RegistryState = RegStateMissing;
}
RegCloseKey(hKey);
}
}
switch (action)
{
case SAP_CTRL_FORCE_REGISTER:
if (RegistryState == RegStateNo)
{
// "no" in registry trumps any registration
return;
}
if (SapState == SapStateEnabled)
{
// already active
return;
}
break;
case SAP_CTRL_MAYBE_REGISTER:
if (RegistryState == RegStateNo)
{
// "no" in registry trumps any registration
return;
}
if (SapState == SapStateEnabled)
{
// already registered
return;
}
if (RegistryState == RegStateYes)
{
// don't check services, just register.
break;
}
if (SapState == SapStateNoServices)
{
ASSERT( RegistryState != RegStateYes ); // in case checks are rearranged
// the appropriate services are not installed
return;
}
//
// Getting here means we don't know yet whether the proper services are installed.
//
// Depending on configuration, this controls if automatic
// listens (due to DCOM configuration) enable SAPing or not.
type = NtProductWinNt;
RtlGetNtProductType(&type);
status = ERROR_SERVICE_DOES_NOT_EXIST;
if (type != NtProductWinNt)
{
// Server platform, try NWCWorkstation
status = ServiceInstalled(L"NWCWorkstation");
}
if (status == ERROR_SERVICE_DOES_NOT_EXIST)
{
status = ServiceInstalled(L"NwSapAgent");
}
if (status == ERROR_SERVICE_DOES_NOT_EXIST)
{
SapState = SapStateNoServices;
return;
}
//
// Proper services are installed.
//
break;
case SAP_CTRL_UPDATE_ADDRESS:
if (SapState != SapStateEnabled)
{
return;
}
break;
case SAP_CTRL_UNREGISTER:
if (SapState == SapStateDisabled ||
SapState == SapStateNoServices)
{
// already not registered
}
break;
default:
ASSERT( 0 );
}
AdvertiseNameWithSap();
}
void
AdvertiseNameWithSap()
/*++
Parameters:
Description:
Returns:
--*/
{
// winsock (socket, bind, getsockname) parameters
SOCKADDR_IPX new_ipxaddr;
static SOCKADDR_IPX old_ipxaddr = { AF_IPX, { 0 }, { 0 }, 0 } ;
static CRITICAL_SECTION * pCritsec;
SOCKET s;
int err;
int size;
//
// A critical section protects old_ipxaddr since several different events lead to
// calling this function. The following code makes sure that the critical
// section is created, and that all threads are using the same one.
//
if (!pCritsec)
{
CRITICAL_SECTION * myCritsec = HeapAlloc( GetProcessHeap(), 0, sizeof(CRITICAL_SECTION));
if (!myCritsec)
{
return;
}
err = RtlInitializeCriticalSection( myCritsec );
if (!NT_SUCCESS(err))
{
HeapFree(GetProcessHeap(), 0, myCritsec);
return;
}
myCritsec = (CRITICAL_SECTION *) InterlockedExchangePointer( (PVOID *) &pCritsec, myCritsec );
if (myCritsec)
{
HeapFree(GetProcessHeap(), 0, myCritsec);
}
}
//
// Get this server's IPX address.
//
s = socket( AF_IPX, SOCK_DGRAM, NSPROTO_IPX );
if (s != -1)
{
size = sizeof(new_ipxaddr);
memset(&new_ipxaddr, 0, sizeof(new_ipxaddr));
new_ipxaddr.sa_family = AF_IPX;
err = bind(s, (struct sockaddr *)&new_ipxaddr, sizeof(new_ipxaddr));
if (err == 0)
{
err = getsockname(s, (struct sockaddr *)&new_ipxaddr, &size);
}
}
else
{
err = -1;
}
if (err != 0)
{
KdPrintEx((DPFLTR_DCOMSS_ID,
DPFLTR_WARNING_LEVEL,
"OR: socket() or getsockname() failed %d, aborting SAP setup\n",
GetLastError()));
return;
}
if (s != -1)
{
closesocket(s);
}
EnterCriticalSection( pCritsec );
if (0 != memcmp( old_ipxaddr.sa_netnum, new_ipxaddr.sa_netnum, sizeof(old_ipxaddr.sa_netnum)) ||
0 != memcmp( old_ipxaddr.sa_nodenum, new_ipxaddr.sa_nodenum, sizeof(old_ipxaddr.sa_nodenum)))
{
memcpy( &old_ipxaddr, &new_ipxaddr, sizeof(old_ipxaddr) );
LeaveCriticalSection( pCritsec );
if (*((long *) &new_ipxaddr.sa_netnum) != IPX_BOGUS_NETWORK_NUMBER)
{
CallSetService( &new_ipxaddr, TRUE);
}
else
{
KdPrintEx((DPFLTR_DCOMSS_ID,
DPFLTR_WARNING_LEVEL,
"OR: SPX net number is bogus. Not registering until a real address arrives. \n"));
CallSetService( &new_ipxaddr, FALSE);
}
}
else
{
LeaveCriticalSection( pCritsec );
}
}
void
CallSetService(
SOCKADDR_IPX * pipxaddr,
BOOL fRegister
)
/*++
Function Name:CallSetService
Parameters:
Description:
Returns:
--*/
{
DWORD ignore;
DWORD status;
// SetService params
WSAQUERYSETW info;
CSADDR_INFO addresses;
// GetComputerName parameters
static WCHAR buffer[MAX_COMPUTERNAME_LENGTH + 1];
static BOOL bufferValid = FALSE;
if (!bufferValid)
{
// Get this server's name
ignore = MAX_COMPUTERNAME_LENGTH + 1;
if (!GetComputerNameW(buffer, &ignore))
{
return;
}
bufferValid = TRUE;
}
// We'll register only for the endpoint mapper port. The port
// value is not required but should be the same to avoid
// confusing routers keeping track of SAPs...
pipxaddr->sa_socket = htons(34280);
// Fill in the service info structure.
memset(&info, 0, sizeof(info));
info.dwSize = sizeof(info);
info.lpszServiceInstanceName = buffer;
info.lpServiceClassId = (GUID *)&RPC_SAP_SERVICE_TYPE;
info.lpszComment = L"RPC Services";
info.dwNameSpace = NS_SAP;
info.dwNumberOfCsAddrs = 1;
info.lpcsaBuffer = &addresses;
addresses.LocalAddr.iSockaddrLength = sizeof(SOCKADDR_IPX);
addresses.LocalAddr.lpSockaddr = (LPSOCKADDR) pipxaddr;
addresses.RemoteAddr.iSockaddrLength = sizeof(SOCKADDR_IPX);
addresses.RemoteAddr.lpSockaddr = (LPSOCKADDR) pipxaddr;
addresses.iSocketType = AF_IPX;
addresses.iProtocol = NSPROTO_IPX;
status = WSASetService(&info,
fRegister ? RNRSERVICE_REGISTER : RNRSERVICE_DEREGISTER,
0);
ASSERT(status == SOCKET_ERROR || status == 0);
if (status == SOCKET_ERROR)
{
status = GetLastError();
}
if (status == 0)
{
if (fRegister)
{
SapState = SapStateEnabled;
}
else
{
SapState = SapStateDisabled;
}
}
else
{
KdPrintEx((DPFLTR_DCOMSS_ID,
DPFLTR_WARNING_LEVEL,
"OR: WSASetService(%s) failed %d\n",
fRegister ? "ENABLE" : "DISABLE",
status));
}
return;
}
#endif
extern void
DealWithDeviceEvent();
void RPC_ENTRY
UpdateAddresses( PVOID arg )
{
// Calls to this function are serialized
DealWithDeviceEvent();
}
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