You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1126 lines
39 KiB
1126 lines
39 KiB
/*************************************************************************
|
|
* Microsoft Windows NT *
|
|
* *
|
|
* Copyright(c) Microsoft Corp., 1994 *
|
|
* *
|
|
* Revision History: *
|
|
* *
|
|
* Jan. 23,94 Koti Created *
|
|
* *
|
|
* Description: *
|
|
* *
|
|
* This file contains the functions that actually get the LPD service *
|
|
* running, and also all the functions that deal with socket interface *
|
|
* *
|
|
*************************************************************************/
|
|
|
|
|
|
|
|
#include "lpd.h"
|
|
|
|
typedef struct _FAMILY {
|
|
int family;
|
|
int socklen;
|
|
HANDLE hAcceptThread;
|
|
SOCKET sListener; // the socket that listens for ever
|
|
int iErrcode;
|
|
} FAMILY;
|
|
|
|
FAMILY family[] = {
|
|
{ AF_INET, sizeof(SOCKADDR_IN), NULL },
|
|
{ AF_INET6, sizeof(SOCKADDR_IN6), NULL },
|
|
};
|
|
|
|
#define NUM_FAMILIES (sizeof(family) / sizeof(FAMILY))
|
|
|
|
DWORD
|
|
StartLPDFamily(int famidx)
|
|
{
|
|
SOCKADDR_STORAGE saiSs;
|
|
INT iErrcode;
|
|
BOOL fExclsv;
|
|
SERVENT *pserv;
|
|
DWORD dwNewThreadId;
|
|
DWORD dwErrcode;
|
|
|
|
// Create the socket (which will be the listening socket)
|
|
|
|
family[famidx].sListener = socket( family[famidx].family, SOCK_STREAM, 0 );
|
|
|
|
if ( family[famidx].sListener == INVALID_SOCKET )
|
|
{
|
|
iErrcode = WSAGetLastError();
|
|
|
|
LPD_DEBUG( "socket() failed\n" );
|
|
|
|
return( (DWORD)iErrcode );
|
|
}
|
|
|
|
|
|
//
|
|
// set this port to be "Exclusive" so that no other app can grab it
|
|
//
|
|
|
|
fExclsv = TRUE;
|
|
|
|
if (setsockopt( family[famidx].sListener,
|
|
SOL_SOCKET,
|
|
SO_EXCLUSIVEADDRUSE,
|
|
(CHAR *)&fExclsv,
|
|
sizeof(fExclsv) ) != 0)
|
|
{
|
|
LPD_DEBUG( "setsockopt SO_EXCLUSIVEADDRUSE failed\n");
|
|
}
|
|
|
|
|
|
// bind the socket to the LPD port
|
|
memset(&saiSs, 0, sizeof(saiSs));
|
|
|
|
pserv = getservbyname( "printer", "tcp" );
|
|
|
|
if ( pserv == NULL )
|
|
{
|
|
SS_PORT(&saiSs) = htons( LPD_PORT );
|
|
}
|
|
else
|
|
{
|
|
SS_PORT(&saiSs) = pserv->s_port;
|
|
}
|
|
|
|
saiSs.ss_family = (short)family[famidx].family;
|
|
|
|
iErrcode = bind( family[famidx].sListener, (LPSOCKADDR)&saiSs, sizeof(saiSs) );
|
|
|
|
if ( iErrcode == SOCKET_ERROR )
|
|
{
|
|
|
|
iErrcode = WSAGetLastError();
|
|
|
|
LPD_DEBUG( "bind() failed\n" );
|
|
|
|
closesocket(family[famidx].sListener);
|
|
|
|
family[famidx].sListener = INVALID_SOCKET;
|
|
|
|
return( (DWORD)iErrcode );
|
|
}
|
|
|
|
|
|
// put the socket to listen,
|
|
// backlog should be 50 not 5, MohsinA, 07-May-97.
|
|
|
|
iErrcode = listen( family[famidx].sListener, 50 );
|
|
|
|
if ( iErrcode == SOCKET_ERROR )
|
|
{
|
|
iErrcode = WSAGetLastError();
|
|
|
|
LPD_DEBUG( "listen() failed\n" );
|
|
|
|
closesocket(family[famidx].sListener);
|
|
|
|
family[famidx].sListener = INVALID_SOCKET;
|
|
|
|
return( (DWORD)iErrcode );
|
|
}
|
|
|
|
// Create the thread that keeps looping on accept
|
|
|
|
family[famidx].hAcceptThread = CreateThread( NULL, 0, LoopOnAccept,
|
|
IntToPtr(famidx), 0, &dwNewThreadId );
|
|
|
|
if ( family[famidx].hAcceptThread == (HANDLE)NULL )
|
|
{
|
|
dwErrcode = GetLastError();
|
|
|
|
LPD_DEBUG( "StartLPD:CreateThread() failed\n" );
|
|
|
|
closesocket(family[famidx].sListener);
|
|
|
|
family[famidx].sListener = INVALID_SOCKET;
|
|
|
|
return( dwErrcode );
|
|
}
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* *
|
|
* StartLPD(): *
|
|
* This function does everything that's needed to accept an incoming call *
|
|
* (create a socket, listen, create a thread that loops on accept) *
|
|
* *
|
|
* Returns: *
|
|
* NO_ERROR if everything went ok *
|
|
* Error code (returned by the operation that failed) otherwise *
|
|
* *
|
|
* Parameters: *
|
|
* dwArgc (IN): number of arguments passed in *
|
|
* lpszArgv (IN): arguments to this function (array of null-terminated *
|
|
* strings). First arg is the name of the service and the *
|
|
* remaining are the ones passed by the calling process. *
|
|
* (e.g. net start lpd /p:xyz) *
|
|
* *
|
|
* History: *
|
|
* Jan.23, 94 Koti Created *
|
|
* *
|
|
*****************************************************************************/
|
|
|
|
DWORD StartLPD( DWORD dwArgc, LPTSTR *lpszArgv )
|
|
{
|
|
|
|
INT iErrcode, i;
|
|
HANDLE hNewThread;
|
|
WSADATA wsaData;
|
|
|
|
|
|
// for now, we ignore dwArgc and lpszArgv. Plan is to support
|
|
// command line (and/or registry configurable) parameters to the
|
|
// "net start lpd" command. At that time, we need to use them.
|
|
|
|
|
|
// initialize winsock dll
|
|
|
|
iErrcode = WSAStartup( MAKEWORD(WINSOCK_VER_MAJOR, WINSOCK_VER_MINOR),
|
|
&wsaData );
|
|
if (iErrcode != 0)
|
|
{
|
|
LPD_DEBUG( "WSAStarup() failed\n" );
|
|
|
|
return( (DWORD)iErrcode );
|
|
}
|
|
|
|
// initialize families and only fail if ALL of them fail.
|
|
|
|
for (i=0; i<NUM_FAMILIES; i++) {
|
|
family[i].iErrcode = StartLPDFamily(i);
|
|
}
|
|
if ((family[0].iErrcode != 0) && (family[1].iErrcode != 0)) {
|
|
return( family[0].iErrcode );
|
|
}
|
|
|
|
// everything went fine: the LPD service is now running!
|
|
|
|
return( NO_ERROR );
|
|
|
|
|
|
} // end StartLPD()
|
|
|
|
|
|
void
|
|
StopLPDFamily(INT iFamIdx)
|
|
{
|
|
DWORD dwResult;
|
|
|
|
if (family[iFamIdx].sListener == INVALID_SOCKET) {
|
|
// Not started
|
|
return;
|
|
}
|
|
|
|
SureCloseSocket( family[iFamIdx].sListener );
|
|
|
|
//
|
|
// accept() can take some time to return after the accept socket has
|
|
// been closed. wait for the accept thread to exit before continuing.
|
|
// This will prevent an access violation in the case where WSACleanup
|
|
// is called before accept() returns.
|
|
//
|
|
|
|
LPD_DEBUG( "Waiting for the accept thread to exit\n" );
|
|
dwResult = WaitForSingleObject( family[iFamIdx].hAcceptThread, INFINITE );
|
|
LPD_ASSERT( WAIT_OBJECT_0 == dwResult );
|
|
CloseHandle( family[iFamIdx].hAcceptThread );
|
|
}
|
|
|
|
|
|
/*****************************************************************************
|
|
* *
|
|
* StopLPD(): *
|
|
* This function stops the LPD service by closing the listener socket *
|
|
* (so that new connections are not accepted), and by allowing all the *
|
|
* active threads to finish their job and terminate on their own. *
|
|
* *
|
|
* Returns: *
|
|
* None *
|
|
* *
|
|
* Parameters: *
|
|
* None *
|
|
* *
|
|
* History: *
|
|
* Jan.23, 94 Koti Created *
|
|
* *
|
|
*****************************************************************************/
|
|
|
|
VOID StopLPD( VOID )
|
|
{
|
|
|
|
BOOL fClientsConnected=FALSE;
|
|
INT i;
|
|
|
|
DBG_TRACEIN( "StopLPD" );
|
|
|
|
//
|
|
// first of all, set the flag! This is the *only* place where we
|
|
// change the value, so need not worry about guarding it.
|
|
// This flag will cause all worker threads to exit.
|
|
//
|
|
|
|
fShuttingDownGLB = TRUE;
|
|
|
|
//
|
|
// stop accepting new connections,
|
|
// This will wake the accept(), and LoopOnAccept will exit.
|
|
//
|
|
|
|
for (i=0; i<NUM_FAMILIES; i++) {
|
|
StopLPDFamily(i);
|
|
}
|
|
|
|
EnterCriticalSection( &csConnSemGLB );
|
|
{
|
|
if( Common.AliveThreads > 0 ){
|
|
fClientsConnected = TRUE;
|
|
}
|
|
}
|
|
LeaveCriticalSection( &csConnSemGLB );
|
|
|
|
|
|
// wait here until the last thread to leave sets the event
|
|
|
|
if ( fClientsConnected )
|
|
{
|
|
LPD_DEBUG( "Waiting for last worker thread to exit\n" );
|
|
WaitForSingleObject( hEventLastThreadGLB, INFINITE );
|
|
LPD_DEBUG( "Waiting for last worker thread done.\n" );
|
|
}
|
|
|
|
WSACleanup();
|
|
|
|
DBG_TRACEOUT( "StopLPD" );;
|
|
return;
|
|
|
|
} // end StopLPD()
|
|
|
|
|
|
/*****************************************************************************
|
|
* *
|
|
* LoopOnAccept(): *
|
|
* This function is executed by the new thread that's created in StartLPD *
|
|
* When a new connection request arrives, this function accepts it and *
|
|
* creates a new thread which goes off and processes that connection. *
|
|
* *
|
|
* Returns: *
|
|
* NO_ERROR (always) *
|
|
* *
|
|
* Parameters: *
|
|
* lpArgv (IN): address family index *
|
|
* *
|
|
* History: *
|
|
* Jan.23, 94 Koti Created *
|
|
* *
|
|
*****************************************************************************/
|
|
|
|
DWORD LoopOnAccept( LPVOID lpArgv )
|
|
{
|
|
INT iFamIdx = (INT)(INT_PTR)lpArgv;
|
|
SOCKET sNewConn;
|
|
SOCKADDR_STORAGE saAddr;
|
|
INT cbAddr;
|
|
INT iErrcode;
|
|
PSOCKCONN pscConn = NULL;
|
|
PSOCKCONN pConnToFree = NULL;
|
|
PSOCKCONN pPrevConn = NULL;
|
|
BOOLEAN fLinkedIn=FALSE;
|
|
HANDLE hNewThread;
|
|
DWORD dwNewThreadId;
|
|
DWORD dwErrcode;
|
|
int MoreThread;
|
|
COMMON_LPD local_common;
|
|
int QueueTooLong;
|
|
|
|
DBG_TRACEIN( "LoopOnAccept " );
|
|
cbAddr = sizeof( saAddr );
|
|
|
|
// loop forever, trying to accept new calls
|
|
|
|
while( TRUE )
|
|
{
|
|
LPD_DEBUG( "Calling accept.\n");
|
|
|
|
MoreThread = 0;
|
|
hNewThread = NULL;
|
|
|
|
sNewConn = accept( family[iFamIdx].sListener, (LPSOCKADDR)&saAddr, &cbAddr );
|
|
|
|
if ( sNewConn == INVALID_SOCKET )
|
|
{
|
|
iErrcode = WSAGetLastError();
|
|
|
|
LOGIT(("LoopOnAccept(): accept failed err=%d\n", iErrcode ));
|
|
|
|
if ( iErrcode == WSAEINTR )
|
|
{
|
|
//
|
|
// sListener closed, it's shutdown time:
|
|
// exit loop (& thread!)
|
|
//
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
// some error: ignore; go back & wait! (didn't connect anyway)
|
|
|
|
LOGIT(("LoopOnAccept(): bad accept err=%d\n", iErrcode ));
|
|
|
|
continue;
|
|
}
|
|
}else{ // it's a good connection
|
|
|
|
// Allocate a PSOCKCONN structure for this connection
|
|
|
|
pscConn = (PSOCKCONN)LocalAlloc( LMEM_FIXED, sizeof(SOCKCONN) );
|
|
|
|
// Create a new thread to deal with this connection
|
|
|
|
if ( pscConn != NULL )
|
|
{
|
|
memset( (PCHAR)pscConn, 0, sizeof( SOCKCONN ) );
|
|
|
|
InitializeListHead( &pscConn->CFile_List );
|
|
InitializeListHead( &pscConn->DFile_List );
|
|
|
|
pscConn->sSock = sNewConn;
|
|
|
|
pscConn->fLogGenericEvent = TRUE;
|
|
pscConn->dwThread = 0; // GetCurrentThreadId();
|
|
pscConn->hPrinter = (HANDLE)INVALID_HANDLE_VALUE;
|
|
#ifdef PROFILING
|
|
pscConn->time_queued = time(NULL);
|
|
#endif
|
|
|
|
EnterCriticalSection( &csConnSemGLB );
|
|
{
|
|
Common.TotalAccepts++;
|
|
|
|
//
|
|
// scConnHeadGLB is the head and not used for jobs.
|
|
// Insertheadlist pscConn, WorkerThread will pull
|
|
// it out and process it.
|
|
//
|
|
|
|
if ((Common.QueueLength >= Common.AliveThreads) &&
|
|
(Common.AliveThreads < (int) dwMaxUsersGLB ))
|
|
{
|
|
MoreThread = (int)TRUE;
|
|
}
|
|
|
|
if( Common.QueueLength < (int) MaxQueueLength ){
|
|
QueueTooLong = 0;
|
|
|
|
pscConn->pNext = scConnHeadGLB.pNext;
|
|
scConnHeadGLB.pNext = pscConn;
|
|
fLinkedIn = TRUE;
|
|
|
|
// = Doubly linked now, MohsinA, 28-May-97.
|
|
// pscConn->pPrev = &scConnHeadGLB;
|
|
// pscConn->pNext->pPrev = pscConn;
|
|
|
|
Common.QueueLength++;
|
|
}else{
|
|
QueueTooLong = 1;
|
|
MoreThread = 0;
|
|
fLinkedIn = FALSE;
|
|
}
|
|
|
|
assert( Common.QueueLength > 0 );
|
|
assert( Common.AliveThreads >= 0 );
|
|
assert( Common.TotalAccepts > 0 );
|
|
}
|
|
LeaveCriticalSection( &csConnSemGLB );
|
|
|
|
if( MoreThread ){
|
|
hNewThread = CreateThread( NULL,
|
|
0,
|
|
WorkerThread,
|
|
NULL, // was pscConn
|
|
0,
|
|
&dwNewThreadId );
|
|
|
|
|
|
if( hNewThread == NULL ){
|
|
LPD_DEBUG( "LoopOnAccept: CreateThread failed\n" );
|
|
}
|
|
}else{
|
|
hNewThread = NULL;
|
|
LOGIT(("LoopOnAccept: no new thread, dwMaxUsersGLB=%d.\n",
|
|
dwMaxUsersGLB ));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
LPD_DEBUG( "LoopOnAccept: LocalAlloc(pscConn) failed\n" );
|
|
}
|
|
|
|
|
|
// Update the global information.
|
|
|
|
EnterCriticalSection( &csConnSemGLB );
|
|
{
|
|
if( MoreThread && hNewThread )
|
|
Common.AliveThreads++;
|
|
if( Common.MaxThreads < Common.AliveThreads )
|
|
Common.MaxThreads = Common.AliveThreads;
|
|
if( (pscConn == NULL)
|
|
|| (MoreThread && ! hNewThread)
|
|
|| QueueTooLong
|
|
){
|
|
Common.TotalErrors++;
|
|
}
|
|
local_common = Common; // struct copy, for readonly.
|
|
}
|
|
LeaveCriticalSection( &csConnSemGLB );
|
|
|
|
//
|
|
// Something went wrong? close the new connection, do cleanup.
|
|
// Q. What if CreateThread fails? does another thread
|
|
// picks up this job automatically?
|
|
// A. Yes, another thread will process it.
|
|
// We shouldn't even expect it to be at the head
|
|
// of the queue since we left the CS above.
|
|
//
|
|
|
|
if( (pscConn == NULL)
|
|
|| (MoreThread && !hNewThread )
|
|
|| QueueTooLong
|
|
){
|
|
dwErrcode = GetLastError();
|
|
|
|
pConnToFree = NULL;
|
|
|
|
if (!fLinkedIn)
|
|
{
|
|
pConnToFree = pscConn;
|
|
}
|
|
|
|
//
|
|
// we had already linked it in: try to find it first
|
|
//
|
|
else
|
|
{
|
|
EnterCriticalSection( &csConnSemGLB );
|
|
|
|
// if there is no other thread alive and if we hit an error
|
|
|
|
if( pscConn && ( Common.AliveThreads == 0 ) )
|
|
{
|
|
pPrevConn = &scConnHeadGLB;
|
|
pConnToFree = scConnHeadGLB.pNext;
|
|
|
|
while (pConnToFree)
|
|
{
|
|
if (pConnToFree == pscConn)
|
|
{
|
|
pPrevConn->pNext = pConnToFree->pNext;
|
|
break;
|
|
}
|
|
|
|
pPrevConn = pConnToFree;
|
|
pConnToFree = pConnToFree->pNext;
|
|
}
|
|
}
|
|
LeaveCriticalSection( &csConnSemGLB );
|
|
}
|
|
|
|
if (pConnToFree)
|
|
{
|
|
LocalFree( pConnToFree );
|
|
pscConn = NULL;
|
|
SureCloseSocket( sNewConn );
|
|
}
|
|
|
|
LpdReportEvent( LPDLOG_OUT_OF_RESOURCES, 0, NULL, 0 );
|
|
|
|
}else{
|
|
#ifdef PROFILING
|
|
LOGIT(("PROFILING: LoopOnAccept:\n"
|
|
" QueueLength=%d, MaxQueueLength=%d,\n"
|
|
" AliveThreads=%d, TotalAccepts=%d, TotalErrors=%d\n"
|
|
,
|
|
local_common.QueueLength, MaxQueueLength,
|
|
local_common.AliveThreads,
|
|
local_common.TotalAccepts,
|
|
local_common.TotalErrors ));
|
|
#endif
|
|
}
|
|
|
|
if( hNewThread ){
|
|
CloseHandle( hNewThread );
|
|
}
|
|
}
|
|
|
|
} // while( TRUE )
|
|
|
|
// ====================================================================
|
|
// we reach here only when shutdown is happening. The thread exits here.
|
|
|
|
DBG_TRACEOUT( "LoopOnAccept exit." );
|
|
return NO_ERROR;
|
|
|
|
|
|
} // end LoopOnAccept()
|
|
|
|
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
* *
|
|
* SureCloseSocket(): *
|
|
* This function closes a given socket. It first attempts a graceful *
|
|
* close. If that fails for some reason, then it does a "hard" close *
|
|
* *
|
|
* Returns: *
|
|
* Nothing *
|
|
* *
|
|
* Parameters: *
|
|
* sSockToClose (IN): socket descriptor of the socket to close *
|
|
* *
|
|
* History: *
|
|
* Jan.23, 94 Koti Created *
|
|
* *
|
|
*****************************************************************************/
|
|
|
|
VOID SureCloseSocket( SOCKET sSockToClose )
|
|
{
|
|
|
|
LINGER lLinger;
|
|
|
|
|
|
if (sSockToClose == INVALID_SOCKET)
|
|
{
|
|
LPD_DEBUG( "SureCloseSocket: bad socket\n" );
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
// try to do a graceful close
|
|
|
|
if ( closesocket(sSockToClose) == 0 )
|
|
{
|
|
return;
|
|
}
|
|
|
|
|
|
//for some reason, we couldn't close the socket: do a "hard" close now
|
|
|
|
LPD_DEBUG( "SureCloseSocket: graceful close did not work; doing hard close\n" );
|
|
|
|
lLinger.l_onoff = 1; // non-zero integer to say SO_LINGER
|
|
lLinger.l_linger = 0; // timeout=0 seconds to say "hard" close
|
|
|
|
|
|
// don't bother to check return code: can't do much anyway!
|
|
|
|
setsockopt( sSockToClose, SOL_SOCKET, SO_LINGER,
|
|
(CHAR *)&lLinger, sizeof(lLinger) );
|
|
|
|
closesocket( sSockToClose );
|
|
|
|
|
|
} // end SureCloseSocket()
|
|
|
|
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
* *
|
|
* ReplyToClient(): *
|
|
* This function sends an ACK or a NAK to the LPR client *
|
|
* *
|
|
* Returns: *
|
|
* NO_ERROR if reply sent *
|
|
* Errorcode if something didn't go well *
|
|
* *
|
|
* Parameters: *
|
|
* pscConn (IN): PSOCKCONN structure for this connection *
|
|
* wResponse (IN): what needs to be sent - ACK or NAK *
|
|
* *
|
|
* History: *
|
|
* Jan.24, 94 Koti Created *
|
|
* *
|
|
*****************************************************************************/
|
|
|
|
DWORD ReplyToClient( PSOCKCONN pscConn, WORD wResponse )
|
|
{
|
|
|
|
// we will always send only one byte in this function!
|
|
|
|
CHAR szSndBuf[2];
|
|
INT iErrcode;
|
|
|
|
|
|
szSndBuf[0] = (CHAR)wResponse; // ACK or NAK
|
|
|
|
iErrcode = send( pscConn->sSock, szSndBuf, 1, 0 );
|
|
|
|
if ( iErrcode == 1 )
|
|
{
|
|
return( NO_ERROR );
|
|
}
|
|
|
|
if ( iErrcode == SOCKET_ERROR )
|
|
{
|
|
LPD_DEBUG( "send() failed in ReplyToClient()\n" );
|
|
}
|
|
|
|
return( iErrcode );
|
|
|
|
|
|
} // end ReplyToClient()
|
|
|
|
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
* *
|
|
* GetCmdFromClient(): *
|
|
* This function reads a command sent by the LPR client (keeps reading *
|
|
* until it finds '\n' (LF) in the stream, since every command ends with *
|
|
* a LF). It allocates memory for the command. *
|
|
* *
|
|
* Returns: *
|
|
* NO_ERROR if everything went ok *
|
|
* Errorcode if something goes wrong (e.g. connection goes away etc.) *
|
|
* *
|
|
* Parameters: *
|
|
* pscConn (IN-OUT): PSOCKCONN structure for this connection *
|
|
* *
|
|
* History: *
|
|
* Jan.24, 94 Koti Created *
|
|
* *
|
|
*****************************************************************************/
|
|
|
|
DWORD GetCmdFromClient( PSOCKCONN pscConn )
|
|
{
|
|
|
|
INT cbBytesRead;
|
|
INT cbBytesReadSoFar;
|
|
INT cbBytesToRead;
|
|
INT cbCmdLen;
|
|
INT i;
|
|
BOOL fCompleteCmd=FALSE;
|
|
CHAR szCmdBuf[500];
|
|
PCHAR pchAllocedBuf=NULL;
|
|
PCHAR pchNewAllocedBuf=NULL;
|
|
SOCKET sDestSock;
|
|
DWORD dwErrcode = SOCKET_ERROR;
|
|
|
|
int rdready;
|
|
struct fd_set rdsocks;
|
|
struct timeval timeo = { dwRecvTimeout, 0 };
|
|
|
|
cbCmdLen = 0;
|
|
|
|
cbBytesReadSoFar = 0;
|
|
|
|
sDestSock = pscConn->sSock;
|
|
|
|
|
|
// allocate a 1 byte buffer, so that we can use reallocate in a loop
|
|
|
|
pchAllocedBuf = (PCHAR)LocalAlloc( LMEM_FIXED, 1 );
|
|
|
|
if ( pchAllocedBuf == NULL )
|
|
{
|
|
LPD_DEBUG( "First LocalAlloc failed in GetCmdFromClient()\n" );
|
|
|
|
goto GetCmdFromClient_BAIL;
|
|
}
|
|
|
|
// Keep reading in a loop until we receive one complete command
|
|
// (with rfc1179, we shouldn't get more bytes than one command,
|
|
// though less than one command is possible)
|
|
|
|
//
|
|
// What if the client never sends nor closes? we never Timeout?
|
|
// We loose a worker thread - MohsinA, 01-May-97.
|
|
//
|
|
|
|
do {
|
|
|
|
|
|
FD_ZERO(&rdsocks);
|
|
FD_SET(sDestSock, &rdsocks);
|
|
rdready = select( 1, &rdsocks, 0, 0, &timeo);
|
|
|
|
if( rdready == 0 )
|
|
{
|
|
LOGIT(("GetCmdFromClient: select timeout.\n"));
|
|
goto GetCmdFromClient_BAIL;
|
|
}else if( rdready == SOCKET_ERROR ){
|
|
LOGIT(("GetCmdFromClient: select error %d.\n", GetLastError()));
|
|
goto GetCmdFromClient_BAIL;
|
|
}
|
|
|
|
cbBytesRead = recv( sDestSock, szCmdBuf, sizeof(szCmdBuf), 0 );
|
|
|
|
if ( cbBytesRead <= 0 )
|
|
{
|
|
if ( pchAllocedBuf != NULL )
|
|
{
|
|
LocalFree( pchAllocedBuf );
|
|
}
|
|
return CONNECTION_CLOSED;
|
|
}
|
|
|
|
cbBytesToRead = cbBytesRead;
|
|
|
|
// see if we have received one complete command
|
|
|
|
for( i=0; i<cbBytesRead; i++)
|
|
{
|
|
if ( szCmdBuf[i] == LF )
|
|
{
|
|
fCompleteCmd = TRUE;
|
|
|
|
cbCmdLen = (i+1) + (cbBytesReadSoFar);
|
|
|
|
cbBytesToRead = (i+1);
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
// our needs are now bigger: reallocate memory
|
|
// alloc 1 more for NULL byte
|
|
pchNewAllocedBuf = (PCHAR)LocalReAlloc (pchAllocedBuf,
|
|
cbBytesToRead+cbBytesReadSoFar + 1,
|
|
LMEM_MOVEABLE);
|
|
if (pchNewAllocedBuf == NULL)
|
|
{
|
|
LPD_DEBUG( "Second LocalAlloc failed in GetCmdFromClient()\n" );
|
|
goto GetCmdFromClient_BAIL;
|
|
}
|
|
pchAllocedBuf = pchNewAllocedBuf;
|
|
pchNewAllocedBuf = NULL;
|
|
|
|
|
|
// now copy those bytes into our buffer
|
|
|
|
strncpy( (pchAllocedBuf+cbBytesReadSoFar), szCmdBuf, cbBytesToRead );
|
|
|
|
cbBytesReadSoFar += cbBytesRead;
|
|
|
|
// if some bad implementation of LPR fails to follow spec and
|
|
// never puts LF, then we don't want to be stuck here forever!
|
|
|
|
if ( cbBytesReadSoFar > LPD_MAX_COMMAND_LEN )
|
|
{
|
|
LPD_DEBUG( "GetCmdFromClient(): command len exceeds our max\n" );
|
|
|
|
goto GetCmdFromClient_BAIL;
|
|
}
|
|
|
|
|
|
} while( (!fCompleteCmd) || (cbBytesReadSoFar < cbCmdLen) );
|
|
|
|
pchAllocedBuf[cbCmdLen] = '\0';
|
|
|
|
pscConn->pchCommand = pchAllocedBuf;
|
|
|
|
pscConn->cbCommandLen = cbCmdLen;
|
|
|
|
return( NO_ERROR );
|
|
|
|
//
|
|
// if we reach here, something went wrong: return NULL and
|
|
// the caller will understand!
|
|
//
|
|
|
|
GetCmdFromClient_BAIL:
|
|
|
|
LOGIT(("GetCmdFromClient: failed, err=%d\n", GetLastError() ));
|
|
|
|
if ( pchAllocedBuf != NULL )
|
|
{
|
|
LocalFree( pchAllocedBuf );
|
|
}
|
|
|
|
return dwErrcode;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
* *
|
|
* ReadData(): *
|
|
* This function reads the specified number of bytes into the given *
|
|
* buffer from the given socket. This function blocks until all the *
|
|
* required data is available (or error occurs). *
|
|
* *
|
|
* Returns: *
|
|
* NO_ERROR if everything went ok *
|
|
* Errorcode if something goes wrong (e.g. connection goes away etc.) *
|
|
* *
|
|
* Parameters: *
|
|
* sDestSock (IN): socket from which to read or receive data *
|
|
* pchBuf (OUT): buffer into which to store the data *
|
|
* cbBytesToRead (IN): how many bytes to read *
|
|
* *
|
|
* History: *
|
|
* Jan.24, 94 Koti Created *
|
|
* *
|
|
*****************************************************************************/
|
|
|
|
DWORD ReadData( SOCKET sDestSock, PCHAR pchBuf, DWORD cbBytesToRead )
|
|
{
|
|
|
|
|
|
DWORD cbBytesExpctd;
|
|
DWORD cbBytesRead;
|
|
|
|
int rdready;
|
|
struct fd_set rdsocks;
|
|
struct timeval timeo = { dwRecvTimeout, 0 };
|
|
|
|
|
|
cbBytesExpctd = cbBytesToRead;
|
|
|
|
do{
|
|
|
|
FD_ZERO(&rdsocks);
|
|
FD_SET(sDestSock, &rdsocks);
|
|
rdready = select( 1, &rdsocks, 0, 0, &timeo);
|
|
|
|
if( rdready == 0 ){
|
|
LOGIT(("ReadData: select timeout.\n"));
|
|
goto ReadData_Bail;
|
|
}else if( rdready == SOCKET_ERROR ){
|
|
LOGIT(("ReadData: select error %d.\n", GetLastError()));
|
|
goto ReadData_Bail;
|
|
}
|
|
|
|
cbBytesRead = recv( sDestSock, pchBuf, cbBytesExpctd, 0 );
|
|
|
|
if ( (cbBytesRead == SOCKET_ERROR) || (cbBytesRead == 0) )
|
|
{
|
|
goto ReadData_Bail;
|
|
}
|
|
|
|
cbBytesExpctd -= cbBytesRead;
|
|
pchBuf += cbBytesRead;
|
|
|
|
} while( cbBytesExpctd != 0 );
|
|
|
|
|
|
return( NO_ERROR );
|
|
|
|
ReadData_Bail:
|
|
|
|
LOGIT(("ReadData: failed %d\n", GetLastError() ));
|
|
return LPDERR_NORESPONSE;
|
|
|
|
} // end ReadData()
|
|
|
|
|
|
// ========================================================================
|
|
// We sleep while file is downloaded from the socket.
|
|
// Performance fix, MohsinA, 23-Apr-97.
|
|
//
|
|
|
|
DWORD ReadDataEx( SOCKET sDestSock, PCHAR pchBuf, DWORD cbBytesToRead )
|
|
{
|
|
BOOL ok;
|
|
DWORD err;
|
|
DWORD BytesRead = 0;
|
|
OVERLAPPED ol = { 0,0,0,0,0 };
|
|
|
|
while( cbBytesToRead ){
|
|
|
|
ok = ReadFile( (HANDLE) sDestSock,
|
|
pchBuf,
|
|
cbBytesToRead,
|
|
&BytesRead,
|
|
&ol );
|
|
|
|
if( ok ){
|
|
cbBytesToRead -= BytesRead;
|
|
pchBuf += BytesRead;
|
|
continue;
|
|
}
|
|
|
|
// Else ReadFile is pending?
|
|
|
|
err = GetLastError();
|
|
switch( err ){
|
|
case ERROR_IO_PENDING :
|
|
ok = GetOverlappedResult( (HANDLE) sDestSock,
|
|
&ol,
|
|
&BytesRead,
|
|
TRUE );
|
|
if( ! ok ){
|
|
err = GetLastError();
|
|
LOGIT(("lpd:ReadDataEx:GetOverlappedResult failed %d.\n",
|
|
err ));
|
|
return LPDERR_NORESPONSE;
|
|
}
|
|
break;
|
|
case ERROR_HANDLE_EOF :
|
|
return NO_ERROR;
|
|
default:
|
|
LOGIT(("lpd:ReadDataEx:ReadFileEx failed %d.\n", err ));
|
|
return LPDERR_NORESPONSE;
|
|
}
|
|
|
|
} // while.
|
|
|
|
return( NO_ERROR );
|
|
}
|
|
|
|
|
|
/*****************************************************************************
|
|
* *
|
|
* SendData(): *
|
|
* This function attempts to send the specified number of bytes over the *
|
|
* given socket. The function blocks until send() returns. *
|
|
* *
|
|
* Returns: *
|
|
* NO_ERROR if everything went ok *
|
|
* Errorcode if data couldn't be sent (e.g. connection goes away etc.) *
|
|
* *
|
|
* Parameters: *
|
|
* sDestSock (IN): socket over which to send data *
|
|
* pchBuf (IN): buffer containing data *
|
|
* cbBytesToSend (IN): how many bytes to send *
|
|
* *
|
|
* History: *
|
|
* Jan.24, 94 Koti Created *
|
|
* *
|
|
*****************************************************************************/
|
|
|
|
DWORD SendData( SOCKET sDestSock, PCHAR pchBuf, DWORD cbBytesToSend )
|
|
{
|
|
|
|
INT iErrcode;
|
|
|
|
|
|
iErrcode = send( sDestSock, pchBuf, cbBytesToSend, 0 );
|
|
|
|
if ( iErrcode == SOCKET_ERROR )
|
|
{
|
|
LPD_DEBUG( "send() failed in SendData()\n" );
|
|
}
|
|
|
|
return( (DWORD)iErrcode );
|
|
|
|
|
|
|
|
} // end SendData()
|
|
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
* *
|
|
* GetClientInfo(); *
|
|
* This function retrieves info about the client (for now, only the IP *
|
|
* address). This info is used during logging. *
|
|
* *
|
|
* Returns: *
|
|
* Nothing *
|
|
* Parameters: *
|
|
* pscConn (IN-OUT): PSOCKCONN structure for this connection *
|
|
* *
|
|
* History: *
|
|
* Jan.24, 94 Koti Created *
|
|
* *
|
|
*****************************************************************************/
|
|
|
|
VOID GetClientInfo( PSOCKCONN pscConn )
|
|
{
|
|
|
|
INT iErrcode;
|
|
INT iLen, iLen2;
|
|
SOCKADDR_STORAGE saName;
|
|
|
|
|
|
iLen = sizeof(saName);
|
|
|
|
iErrcode = getpeername( pscConn->sSock, (SOCKADDR *)&saName, &iLen );
|
|
|
|
if ( iErrcode == 0 )
|
|
{
|
|
iLen2 = sizeof(pscConn->szIPAddr);
|
|
SS_PORT(&saName) = 0;
|
|
iErrcode = WSAAddressToString((SOCKADDR*)&saName, iLen, NULL,
|
|
pscConn->szIPAddr, &iLen2);
|
|
}
|
|
|
|
|
|
if (iErrcode == SOCKET_ERROR)
|
|
{
|
|
LPD_DEBUG( "GetClientInfo(): couldn't retrieve ip address!\n" );
|
|
|
|
strcpy( pscConn->szIPAddr, GETSTRING( LPD_ERMSG_NO_IPADDR) );
|
|
|
|
return;
|
|
}
|
|
|
|
LOGTIME;
|
|
LOGIT(("GetClientInfo: %s:%d\n",
|
|
pscConn->szIPAddr,
|
|
htons(SS_PORT(&saName)) ));
|
|
|
|
|
|
} // end GetClientInfo()
|
|
|
|
|
|
/*****************************************************************************
|
|
* *
|
|
* GetServerInfo(); *
|
|
* This function retrieves info about the Server (for now, only the IP *
|
|
* address). This info is used during logging. *
|
|
* *
|
|
* Returns: *
|
|
* Nothing *
|
|
* Parameters: *
|
|
* pscConn (IN-OUT): PSOCKCONN structure for this connection *
|
|
* *
|
|
* History: From Albert Ting, Printer Group, 4-Mar-97. *
|
|
* MohsinA. *
|
|
*****************************************************************************/
|
|
|
|
VOID GetServerInfo( PSOCKCONN pscConn )
|
|
{
|
|
|
|
INT iErrcode;
|
|
INT iLen, iLen2;
|
|
SOCKADDR_STORAGE saName;
|
|
|
|
|
|
iLen = sizeof(saName);
|
|
|
|
iErrcode = getsockname( pscConn->sSock, (SOCKADDR *)&saName, &iLen );
|
|
|
|
if ( iErrcode == 0 ){
|
|
iLen2 = sizeof(pscConn->szServerIPAddr);
|
|
SS_PORT(&saName) = 0;
|
|
iErrcode = WSAAddressToString((SOCKADDR*)&saName, iLen, NULL,
|
|
pscConn->szServerIPAddr, &iLen2);
|
|
}
|
|
|
|
if (iErrcode == SOCKET_ERROR){
|
|
LPD_DEBUG( "GetServerInfo(): couldn't retrieve ip address!\n" );
|
|
strcpy( pscConn->szServerIPAddr, GETSTRING( LPD_ERMSG_NO_IPADDR) );
|
|
return;
|
|
}
|
|
|
|
} // end GetServerInfo()
|
|
|