1322 lines
40 KiB
C++
1322 lines
40 KiB
C++
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/* * $Id$
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*
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* L O S A L A M O S
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* Los Alamos National Laboratory
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* Los Alamos, New Mexico 87545
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*
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* Copyright, 1986, The Regents of the University of California.
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*
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* Author: Jeff Hill
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*/
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#define epicsAssertAuthor "Jeff Hill johill@lanl.gov"
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#include "localHostName.h"
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#include "iocinf.h"
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#include "virtualCircuit.h"
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#include "inetAddrID.h"
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#include "cac.h"
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#include "netiiu.h"
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#include "netIO.h"
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#include "msgForMultiplyDefinedPV.h"
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#define epicsExportSharedSymbols
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#include "net_convert.h"
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#include "bhe.h"
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#undef epicsExportSharedSymbols
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// nill message alignment pad bytes
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static const char nillBytes [] =
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{
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0, 0, 0, 0,
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0, 0, 0, 0
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};
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//
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// cacSendThreadTCP ()
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//
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// care is taken to not hold the lock while sending a message
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//
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extern "C" void cacSendThreadTCP ( void *pParam )
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{
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tcpiiu *piiu = ( tcpiiu * ) pParam;
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try {
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while ( true ) {
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bool flowControlLaborNeeded;
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bool echoLaborNeeded;
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piiu->sendThreadFlushEvent.wait ();
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if ( piiu->state != iiu_connected ) {
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break;
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}
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{
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epicsAutoMutex autoMutex ( piiu->pCAC()->mutexRef() );
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flowControlLaborNeeded =
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piiu->busyStateDetected != piiu->flowControlActive;
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echoLaborNeeded = piiu->echoRequestPending;
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piiu->echoRequestPending = false;
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}
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if ( flowControlLaborNeeded ) {
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if ( piiu->flowControlActive ) {
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piiu->disableFlowControlRequest ();
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piiu->flowControlActive = false;
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debugPrintf ( ( "fc off\n" ) );
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}
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else {
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piiu->enableFlowControlRequest ();
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piiu->flowControlActive = true;
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debugPrintf ( ( "fc on\n" ) );
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}
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}
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if ( echoLaborNeeded ) {
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if ( CA_V43 ( piiu->minorProtocolVersion ) ) {
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piiu->echoRequest ();
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}
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else {
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piiu->noopRequest ();
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}
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}
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if ( ! piiu->flush () ) {
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break;
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}
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}
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}
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catch ( ... ) {
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piiu->printf ("cac: tcp send thread received an exception - diconnecting\n");
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piiu->forcedShutdown ();
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}
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piiu->sendThreadExitEvent.signal ();
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}
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unsigned tcpiiu::sendBytes ( const void *pBuf,
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unsigned nBytesInBuf )
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{
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int status;
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unsigned nBytes;
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if ( this->state != iiu_connected ) {
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return 0u;
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}
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assert ( nBytesInBuf <= INT_MAX );
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this->sendDog.start ();
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while ( true ) {
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status = ::send ( this->sock,
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static_cast < const char * > (pBuf), (int) nBytesInBuf, 0 );
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if ( status > 0 ) {
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nBytes = static_cast <unsigned> ( status );
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break;
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}
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else {
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int localError = SOCKERRNO;
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if ( status == 0 ) {
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this->cleanShutdown ();
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nBytes = 0u;
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break;
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}
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if ( localError == SOCK_SHUTDOWN ) {
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nBytes = 0u;
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break;
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}
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if ( localError == SOCK_EINTR ) {
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continue;
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}
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if ( localError != SOCK_EPIPE && localError != SOCK_ECONNRESET &&
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localError != SOCK_ETIMEDOUT && localError != SOCK_ECONNABORTED ) {
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this->printf ( "CAC: unexpected TCP send error: %s\n", SOCKERRSTR (localError) );
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}
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this->cleanShutdown ();
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nBytes = 0u;
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break;
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}
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}
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this->sendDog.cancel ();
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return nBytes;
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}
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unsigned tcpiiu::recvBytes ( void *pBuf, unsigned nBytesInBuf )
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{
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if ( this->state != iiu_connected ) {
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return 0u;
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}
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assert ( nBytesInBuf <= INT_MAX );
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int status = ::recv ( this->sock, static_cast <char *> ( pBuf ),
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static_cast <int> ( nBytesInBuf ), 0);
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if ( status <= 0 ) {
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int localErrno = SOCKERRNO;
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if ( status == 0 ) {
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this->cleanShutdown ();
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return 0u;
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}
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if ( localErrno == SOCK_SHUTDOWN ) {
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return 0u;
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}
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if ( localErrno == SOCK_EINTR ) {
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return 0u;
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}
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if ( localErrno == SOCK_ECONNABORTED ) {
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return 0u;
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}
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if ( localErrno == SOCK_ECONNRESET ) {
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return 0u;
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}
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{
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char name[64];
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this->hostName ( name, sizeof ( name ) );
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this->printf ( "Disconnecting from CA server %s because: %s\n",
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name, SOCKERRSTR ( localErrno ) );
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}
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this->cleanShutdown ();
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return 0u;
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}
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assert ( static_cast <unsigned> ( status ) <= nBytesInBuf );
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return static_cast <unsigned> ( status );
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}
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/*
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* cacRecvThreadTCP ()
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*/
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extern "C" void cacRecvThreadTCP ( void *pParam )
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{
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tcpiiu *piiu = ( tcpiiu * ) pParam;
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piiu->connect ();
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{
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epicsAutoMutex autoMutex ( piiu->pCAC()->mutexRef() );
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if ( piiu->state == iiu_connected ) {
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unsigned priorityOfSend;
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epicsThreadBooleanStatus tbs;
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epicsThreadId tid;
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tbs = epicsThreadLowestPriorityLevelAbove ( piiu->pCAC ()->getInitializingThreadsPriority (), &priorityOfSend );
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if ( tbs != epicsThreadBooleanStatusSuccess ) {
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priorityOfSend = piiu->pCAC ()->getInitializingThreadsPriority ();
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}
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tid = epicsThreadCreate ( "CAC-TCP-send", priorityOfSend,
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epicsThreadGetStackSize ( epicsThreadStackMedium ), cacSendThreadTCP, piiu );
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if ( ! tid ) {
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piiu->recvThreadExitEvent.signal ();
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piiu->sendThreadExitEvent.signal ();
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piiu->cleanShutdown ();
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return;
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}
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}
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else {
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piiu->recvThreadExitEvent.signal ();
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piiu->sendThreadExitEvent.signal ();
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piiu->cleanShutdown ();
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return;
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}
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}
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unsigned nBytes = 0u;
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while ( piiu->state == iiu_connected ) {
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if ( nBytes >= maxBytesPendingTCP ) {
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piiu->recvThreadRingBufferSpaceAvailableEvent.wait ();
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epicsAutoMutex autoMutex ( piiu->pCAC()->mutexRef() );
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nBytes = piiu->recvQue.occupiedBytes ();
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}
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else {
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comBuf * pComBuf = new ( std::nothrow ) comBuf;
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if ( pComBuf ) {
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unsigned nBytesIn = pComBuf->fillFromWire ( *piiu );
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if ( nBytesIn ) {
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bool msgHeaderButNoBody;
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{
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epicsAutoMutex autoMutex ( piiu->pCAC()->mutexRef() );
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nBytes = piiu->recvQue.occupiedBytes ();
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msgHeaderButNoBody = piiu->oldMsgHeaderAvailable;
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piiu->recvQue.pushLastComBufReceived ( *pComBuf );
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if ( nBytesIn == pComBuf->capacityBytes () ) {
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if ( piiu->contigRecvMsgCount >= contiguousMsgCountWhichTriggersFlowControl ) {
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piiu->busyStateDetected = true;
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}
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else {
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piiu->contigRecvMsgCount++;
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}
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}
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else {
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piiu->contigRecvMsgCount = 0u;
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piiu->busyStateDetected = false;
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}
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piiu->unacknowledgedSendBytes = 0u;
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// reschedule connection activity watchdog
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piiu->recvDog.messageArrivalNotify ();
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}
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// wake up recv thread only if
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// 1) there are currently no bytes in the queue
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// 2) if the recv thread is currently blocking for an incomplete msg
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if ( nBytes < sizeof ( caHdr ) || msgHeaderButNoBody ) {
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piiu->pCAC()->signalRecvActivity ();
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}
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if ( nBytes <= UINT_MAX - nBytesIn ) {
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nBytes += nBytesIn;
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}
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else {
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nBytes = UINT_MAX;
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}
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}
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else {
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pComBuf->destroy ();
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epicsAutoMutex autoMutex ( piiu->pCAC()->mutexRef() );
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nBytes = piiu->recvQue.occupiedBytes ();
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}
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}
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else {
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// no way to be informed when memory is available
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epicsThreadSleep ( 0.5 );
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epicsAutoMutex autoMutex ( piiu->pCAC()->mutexRef() );
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nBytes = piiu->recvQue.occupiedBytes ();
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}
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}
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}
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piiu->recvThreadExitEvent.signal ();
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}
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//
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// tcpiiu::tcpiiu ()
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//
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tcpiiu::tcpiiu ( cac &cac, double connectionTimeout,
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epicsTimerQueue &timerQueue, const osiSockAddr &addrIn,
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unsigned minorVersion, class bhe &bheIn,
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ipAddrToAsciiEngine &engineIn ) :
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netiiu ( &cac ),
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recvDog ( *this, connectionTimeout, timerQueue ),
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sendDog ( *this, connectionTimeout, timerQueue ),
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sendQue ( *this ),
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addr ( addrIn ),
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curDataMax ( MAX_TCP ),
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curDataBytes ( 0ul ),
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pHostNameCache ( new hostNameCache ( addrIn, engineIn ) ),
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BHE ( bheIn ),
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pCurData ( cac.allocateSmallBufferTCP () ),
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minorProtocolVersion ( minorVersion ),
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state ( iiu_connecting ),
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sock ( INVALID_SOCKET ),
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contigRecvMsgCount ( 0u ),
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blockingForFlush ( 0u ),
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socketLibrarySendBufferSize ( 0u ),
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unacknowledgedSendBytes ( 0u ),
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busyStateDetected ( false ),
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flowControlActive ( false ),
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echoRequestPending ( false ),
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oldMsgHeaderAvailable ( false ),
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msgHeaderAvailable ( false ),
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sockCloseCompleted ( false ),
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f_trueOnceOnly ( true ),
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earlyFlush ( false )
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{
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if ( ! this->pCurData ) {
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throw std::bad_alloc ();
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}
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if ( ! this->pHostNameCache.get () ) {
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throw std::bad_alloc ();
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}
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this->BHE.bindToIIU ( *this );
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this->sock = socket ( AF_INET, SOCK_STREAM, IPPROTO_TCP );
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if ( this->sock == INVALID_SOCKET ) {
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this->printf ( "CAC: unable to create virtual circuit because \"%s\"\n",
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SOCKERRSTR ( SOCKERRNO ) );
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cac.releaseSmallBufferTCP ( this->pCurData );
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throw std::bad_alloc ();
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}
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int flag = true;
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int status = setsockopt ( this->sock, IPPROTO_TCP, TCP_NODELAY,
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(char *) &flag, sizeof ( flag ) );
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if ( status < 0 ) {
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this->printf ("CAC: problems setting socket option TCP_NODELAY = \"%s\"\n",
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SOCKERRSTR (SOCKERRNO));
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}
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flag = true;
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status = setsockopt ( this->sock , SOL_SOCKET, SO_KEEPALIVE,
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( char * ) &flag, sizeof ( flag ) );
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if ( status < 0 ) {
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this->printf ( "CAC: problems setting socket option SO_KEEPALIVE = \"%s\"\n",
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SOCKERRSTR ( SOCKERRNO ) );
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}
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// load message queue with messages informing server
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// of user and host name of client
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this->userNameSetRequest ();
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this->hostNameSetRequest ();
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# if 0
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{
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int i;
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/*
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* some concern that vxWorks will run out of mBuf's
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* if this change is made joh 11-10-98
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*/
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i = MAX_MSG_SIZE;
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status = setsockopt ( this->sock, SOL_SOCKET, SO_SNDBUF,
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( char * ) &i, sizeof ( i ) );
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if (status < 0) {
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this->printf ("CAC: problems setting socket option SO_SNDBUF = \"%s\"\n",
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SOCKERRSTR ( SOCKERRNO ) );
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}
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i = MAX_MSG_SIZE;
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status = setsockopt ( this->sock, SOL_SOCKET, SO_RCVBUF,
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( char * ) &i, sizeof ( i ) );
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if ( status < 0 ) {
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this->printf ("CAC: problems setting socket option SO_RCVBUF = \"%s\"\n",
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SOCKERRSTR (SOCKERRNO));
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}
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}
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# endif
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{
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int nBytes;
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osiSocklen_t sizeOfParameter = static_cast < int > ( sizeof ( nBytes ) );
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status = getsockopt ( this->sock, SOL_SOCKET, SO_SNDBUF,
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( char * ) &nBytes, &sizeOfParameter );
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if ( status < 0 || nBytes < 0 ||
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sizeOfParameter != static_cast < int > ( sizeof ( nBytes ) ) ) {
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this->printf ("CAC: problems getting socket option SO_SNDBUF = \"%s\"\n",
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SOCKERRSTR ( SOCKERRNO ) );
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this->socketLibrarySendBufferSize = 0u;
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}
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else {
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this->socketLibrarySendBufferSize = static_cast < unsigned > ( nBytes );
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}
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}
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memset ( (void *) &this->curMsg, '\0', sizeof ( this->curMsg ) );
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unsigned priorityOfRecv;
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epicsThreadBooleanStatus tbs = epicsThreadHighestPriorityLevelBelow (
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this->pCAC ()->getInitializingThreadsPriority (), &priorityOfRecv );
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if ( tbs != epicsThreadBooleanStatusSuccess ) {
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priorityOfRecv = this->pCAC ()->getInitializingThreadsPriority ();
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}
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epicsThreadId tid = epicsThreadCreate ( "CAC-TCP-recv", priorityOfRecv,
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epicsThreadGetStackSize ( epicsThreadStackMedium ),
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cacRecvThreadTCP, this);
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if ( tid == 0 ) {
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this->printf ("CA: unable to create CA client receive thread\n");
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cac.releaseSmallBufferTCP ( this->pCurData );
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socket_close ( this->sock );
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throw std::bad_alloc ();
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}
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}
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/*
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* tcpiiu::connect ()
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*/
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void tcpiiu::connect ()
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{
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/*
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* attempt to connect to a CA server
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*/
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this->sendDog.start ();
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while ( ! this->sockCloseCompleted ) {
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int status = ::connect ( this->sock, &this->addr.sa, sizeof ( addr.sa ) );
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if ( status == 0 ) {
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this->sendDog.cancel ();
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epicsAutoMutex autoMutex ( this->pCAC()->mutexRef() );
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if ( this->state == iiu_connecting ) {
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// put the iiu into the connected state
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this->state = iiu_connected;
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// start connection activity watchdog
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this->recvDog.connectNotify ();
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}
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return;
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}
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int errnoCpy = SOCKERRNO;
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if ( errnoCpy == SOCK_EINTR ) {
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if ( this->state != iiu_connecting ) {
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this->sendDog.cancel ();
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return;
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}
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else {
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continue;
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}
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}
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else if ( errnoCpy == SOCK_SHUTDOWN ) {
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this->sendDog.cancel ();
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return;
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}
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else {
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this->sendDog.cancel ();
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this->printf ( "Unable to connect because %d=\"%s\"\n",
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errnoCpy, SOCKERRSTR ( errnoCpy ) );
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this->cleanShutdown ();
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return;
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}
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}
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}
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/*
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* tcpiiu::cleanShutdown ()
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*/
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void tcpiiu::cleanShutdown ()
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{
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epicsAutoMutex autoMutex ( this->pCAC()->mutexRef() );
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if ( this->state == iiu_connected ) {
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int status = ::shutdown ( this->sock, SD_BOTH );
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if ( status ) {
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errlogPrintf ("CAC TCP socket shutdown error was %s\n",
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SOCKERRSTR (SOCKERRNO) );
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status = socket_close ( this->sock );
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if ( status ) {
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errlogPrintf ("CAC TCP socket close error was %s\n",
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SOCKERRSTR (SOCKERRNO) );
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}
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else {
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this->sockCloseCompleted = true;
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this->state = iiu_disconnected;
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}
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}
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else {
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this->state = iiu_disconnected;
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}
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}
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else if ( this->state == iiu_connecting ) {
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int status = socket_close ( this->sock );
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if ( status ) {
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errlogPrintf ("CAC TCP socket close error was %s\n",
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SOCKERRSTR (SOCKERRNO) );
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}
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else {
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this->sockCloseCompleted = true;
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this->state = iiu_disconnected;
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}
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}
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this->sendThreadFlushEvent.signal ();
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this->recvThreadRingBufferSpaceAvailableEvent.signal ();
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this->pCAC ()->signalRecvActivity ();
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}
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|
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/*
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* tcpiiu::forcedShutdown ()
|
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*/
|
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void tcpiiu::forcedShutdown ()
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{
|
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epicsAutoMutex autoMutex ( this->pCAC()->mutexRef() );
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|
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if ( this->state != iiu_disconnected ) {
|
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// force abortive shutdown sequence (discard outstanding sends
|
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// and receives
|
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struct linger tmpLinger;
|
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tmpLinger.l_onoff = true;
|
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tmpLinger.l_linger = 0u;
|
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int status = setsockopt ( this->sock, SOL_SOCKET, SO_LINGER,
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reinterpret_cast <char *> ( &tmpLinger ), sizeof (tmpLinger) );
|
|
if ( status != 0 ) {
|
|
errlogPrintf ( "CAC TCP socket linger set error was %s\n",
|
|
SOCKERRSTR (SOCKERRNO) );
|
|
}
|
|
|
|
status = socket_close ( this->sock );
|
|
if ( status ) {
|
|
errlogPrintf ("CAC TCP socket close error was %s\n",
|
|
SOCKERRSTR (SOCKERRNO) );
|
|
}
|
|
else {
|
|
this->state = iiu_disconnected;
|
|
this->sockCloseCompleted = true;
|
|
}
|
|
}
|
|
|
|
this->sendThreadFlushEvent.signal ();
|
|
this->recvThreadRingBufferSpaceAvailableEvent.signal ();
|
|
this->pCAC()->signalRecvActivity ();
|
|
}
|
|
|
|
//
|
|
// tcpiiu::~tcpiiu ()
|
|
//
|
|
tcpiiu::~tcpiiu ()
|
|
{
|
|
this->sendDog.cancel ();
|
|
this->recvDog.cancel ();
|
|
|
|
this->cleanShutdown ();
|
|
|
|
// wait for send thread to exit
|
|
static const double shutdownDelay = 15.0;
|
|
while ( true ) {
|
|
bool signaled = this->sendThreadExitEvent.wait ( shutdownDelay );
|
|
if ( signaled ) {
|
|
break;
|
|
}
|
|
if ( ! this->sockCloseCompleted ) {
|
|
printf ( "Gave up waiting for \"shutdown()\" to force send thread to exit after %f sec\n",
|
|
shutdownDelay);
|
|
printf ( "Closing socket\n" );
|
|
int status = socket_close ( this->sock );
|
|
if ( status ) {
|
|
errlogPrintf ("CAC TCP socket close error was %s\n",
|
|
SOCKERRSTR ( SOCKERRNO ) );
|
|
}
|
|
else {
|
|
this->sockCloseCompleted = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
// wait for recv thread to exit
|
|
while ( true ) {
|
|
bool signaled = this->recvThreadExitEvent.wait ( shutdownDelay );
|
|
if ( signaled ) {
|
|
break;
|
|
}
|
|
if ( ! this->sockCloseCompleted ) {
|
|
printf ( "Gave up waiting for \"shutdown()\" to force receive thread to exit after %f sec\n",
|
|
shutdownDelay);
|
|
printf ( "Closing socket\n" );
|
|
int status = socket_close ( this->sock );
|
|
if ( status ) {
|
|
errlogPrintf ("CAC TCP socket close error was %s\n",
|
|
SOCKERRSTR ( SOCKERRNO ) );
|
|
}
|
|
else {
|
|
this->sockCloseCompleted = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ( ! this->sockCloseCompleted ) {
|
|
int status = socket_close ( this->sock );
|
|
if ( status ) {
|
|
errlogPrintf ("CAC TCP socket close error was %s\n",
|
|
SOCKERRSTR ( SOCKERRNO ) );
|
|
}
|
|
else {
|
|
this->sockCloseCompleted = true;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* free message body cache
|
|
*/
|
|
{
|
|
epicsAutoMutex autoMutex ( this->pCAC()->mutexRef() );
|
|
|
|
if ( this->pCurData ) {
|
|
if ( this->curDataMax == MAX_TCP ) {
|
|
this->pCAC()->releaseSmallBufferTCP ( this->pCurData );
|
|
}
|
|
else {
|
|
this->pCAC()->releaseLargeBufferTCP ( this->pCurData );
|
|
}
|
|
}
|
|
|
|
this->sendQue.clear ();
|
|
this->recvQue.clear ();
|
|
}
|
|
|
|
// wakeup user threads blocking for send backlog to be reduced
|
|
// and wait for them to stop using this IIU
|
|
this->flushBlockEvent.signal ();
|
|
while ( this->blockingForFlush ) {
|
|
epicsThreadSleep ( 0.1 );
|
|
}
|
|
}
|
|
|
|
void tcpiiu::destroy ()
|
|
{
|
|
delete this;
|
|
}
|
|
|
|
bool tcpiiu::isVirtaulCircuit ( const char *pChannelName, const osiSockAddr &addrIn ) const
|
|
{
|
|
osiSockAddr addrTmp = this->addr;
|
|
|
|
if ( addrTmp.sa.sa_family == AF_UNSPEC ) {
|
|
return false;
|
|
}
|
|
|
|
bool match;
|
|
|
|
if ( addrTmp.sa.sa_family != addrIn.sa.sa_family ) {
|
|
match = false;
|
|
}
|
|
else if ( addrTmp.sa.sa_family != AF_INET ) {
|
|
match = false;
|
|
}
|
|
else if ( addrTmp.ia.sin_addr.s_addr != addrIn.ia.sin_addr.s_addr ) {
|
|
match = false;
|
|
}
|
|
else if ( addrTmp.ia.sin_port != addrIn.ia.sin_port ) {
|
|
match = false;
|
|
}
|
|
else {
|
|
match = true;
|
|
}
|
|
|
|
if ( ! match ) {
|
|
epicsAutoMutex locker ( this->pCAC()->mutexRef() );
|
|
char acc[64];
|
|
this->pHostNameCache->hostName ( acc, sizeof ( acc ) );
|
|
assert ( this->pCAC () );
|
|
msgForMultiplyDefinedPV *pMsg = new msgForMultiplyDefinedPV (
|
|
*this->pCAC (), pChannelName, acc, addrIn );
|
|
if ( pMsg ) {
|
|
this->pCAC ()->ipAddrToAsciiAsynchronousRequestInstall ( *pMsg );
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void tcpiiu::show ( unsigned level ) const
|
|
{
|
|
epicsAutoMutex locker ( this->pCAC()->mutexRef() );
|
|
char buf[256];
|
|
this->pHostNameCache->hostName ( buf, sizeof ( buf ) );
|
|
::printf ( "Virtual circuit to \"%s\" at version V%u.%u state %u\n",
|
|
buf, CA_MAJOR_PROTOCOL_REVISION,
|
|
this->minorProtocolVersion, this->state );
|
|
if ( level > 1u ) {
|
|
this->netiiu::show ( level - 1u );
|
|
}
|
|
if ( level > 2u ) {
|
|
::printf ( "\tcurrent data cache pointer = %p current data cache size = %lu\n",
|
|
static_cast < void * > ( this->pCurData ), this->curDataMax );
|
|
::printf ( "\tcontiguous receive message count=%u, busy detect bool=%u, flow control bool=%u\n",
|
|
this->contigRecvMsgCount, this->busyStateDetected, this->flowControlActive );
|
|
}
|
|
if ( level > 3u ) {
|
|
::printf ( "\tvirtual circuit socket identifier %d\n", this->sock );
|
|
::printf ( "\tsend thread flush signal:\n" );
|
|
this->sendThreadFlushEvent.show ( level-3u );
|
|
::printf ( "\trecv thread buffer space available signal:\n" );
|
|
this->recvThreadRingBufferSpaceAvailableEvent.show ( level-3u );
|
|
::printf ( "\tsend thread exit signal:\n" );
|
|
this->sendThreadExitEvent.show ( level-3u );
|
|
::printf ( "\trecv thread exit signal:\n" );
|
|
this->recvThreadExitEvent.show ( level-3u );
|
|
::printf ("\techo pending bool = %u\n", this->echoRequestPending );
|
|
::printf ( "IO identifier hash table:\n" );
|
|
this->BHE.show ( level - 3u );
|
|
}
|
|
}
|
|
|
|
bool tcpiiu::setEchoRequestPending ()
|
|
{
|
|
{
|
|
epicsAutoMutex locker ( this->pCAC()->mutexRef() );
|
|
this->echoRequestPending = true;
|
|
}
|
|
this->flushRequest ();
|
|
if ( CA_V43 ( this->minorProtocolVersion ) ) {
|
|
// we send an echo
|
|
return true;
|
|
}
|
|
else {
|
|
// we send a NOOP
|
|
return false;
|
|
}
|
|
}
|
|
|
|
//
|
|
// tcpiiu::processIncoming()
|
|
//
|
|
void tcpiiu::processIncoming ()
|
|
{
|
|
while ( 1 ) {
|
|
|
|
//
|
|
// fetch a complete message header
|
|
//
|
|
unsigned nBytes = this->recvQue.occupiedBytes ();
|
|
|
|
if ( ! this->msgHeaderAvailable ) {
|
|
if ( ! this->oldMsgHeaderAvailable ) {
|
|
if ( nBytes < sizeof ( caHdr ) ) {
|
|
return;
|
|
}
|
|
this->curMsg.m_cmmd = this->recvQue.popUInt16 ();
|
|
this->curMsg.m_postsize = this->recvQue.popUInt16 ();
|
|
this->curMsg.m_dataType = this->recvQue.popUInt16 ();
|
|
this->curMsg.m_count = this->recvQue.popUInt16 ();
|
|
this->curMsg.m_cid = this->recvQue.popUInt32 ();
|
|
this->curMsg.m_available = this->recvQue.popUInt32 ();
|
|
this->oldMsgHeaderAvailable = true;
|
|
}
|
|
if ( this->curMsg.m_postsize == 0xffff ) {
|
|
static const unsigned annexSize =
|
|
sizeof ( this->curMsg.m_postsize ) + sizeof ( this->curMsg.m_count );
|
|
if ( this->recvQue.occupiedBytes () < annexSize ) {
|
|
return;
|
|
}
|
|
this->curMsg.m_postsize = this->recvQue.popUInt32 ();
|
|
this->curMsg.m_count = this->recvQue.popUInt32 ();
|
|
}
|
|
this->msgHeaderAvailable = true;
|
|
debugPrintf (
|
|
( "%s Cmd=%3u Type=%3u Count=%8u Size=%8u",
|
|
this->pHostName (),
|
|
this->curMsg.m_cmmd,
|
|
this->curMsg.m_dataType,
|
|
this->curMsg.m_count,
|
|
this->curMsg.m_postsize) );
|
|
debugPrintf (
|
|
( " Avail=%8u Cid=%8u\n",
|
|
this->curMsg.m_available,
|
|
this->curMsg.m_cid) );
|
|
}
|
|
|
|
//
|
|
// make sure we have a large enough message body cache
|
|
//
|
|
if ( this->curMsg.m_postsize > this->curDataMax ) {
|
|
if ( this->curDataMax == MAX_TCP &&
|
|
this->pCAC()->largeBufferSizeTCP() >= this->curMsg.m_postsize ) {
|
|
char * pBuf = this->pCAC()->allocateLargeBufferTCP ();
|
|
if ( pBuf ) {
|
|
this->pCAC()->releaseSmallBufferTCP ( this->pCurData );
|
|
this->pCurData = pBuf;
|
|
this->curDataMax = this->pCAC()->largeBufferSizeTCP ();
|
|
}
|
|
else {
|
|
this->printf ("CAC: not enough memory for message body cache (ignoring response message)\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
if ( this->curMsg.m_postsize <= this->curDataMax ) {
|
|
if ( this->curMsg.m_postsize > 0u ) {
|
|
this->curDataBytes += this->recvQue.copyOutBytes (
|
|
&this->pCurData[this->curDataBytes],
|
|
this->curMsg.m_postsize - this->curDataBytes );
|
|
if ( this->curDataBytes < this->curMsg.m_postsize ) {
|
|
this->recvThreadRingBufferSpaceAvailableEvent.signal ();
|
|
return;
|
|
}
|
|
}
|
|
bool msgOK = this->pCAC()->executeResponse ( *this,
|
|
this->curMsg, this->pCurData );
|
|
if ( ! msgOK ) {
|
|
this->cleanShutdown ();
|
|
return;
|
|
}
|
|
}
|
|
else {
|
|
static bool once = false;
|
|
if ( ! once ) {
|
|
this->printf (
|
|
"CAC: response with payload size=%u > EPICS_CA_MAX_ARRAY_BYTES ignored\n",
|
|
this->curMsg.m_postsize );
|
|
}
|
|
this->curDataBytes += this->recvQue.removeBytes (
|
|
this->curMsg.m_postsize - this->curDataBytes );
|
|
if ( this->curDataBytes < this->curMsg.m_postsize ) {
|
|
this->recvThreadRingBufferSpaceAvailableEvent.signal ();
|
|
return;
|
|
}
|
|
}
|
|
|
|
if ( nBytes >= maxBytesPendingTCP &&
|
|
this->recvQue.occupiedBytes () < maxBytesPendingTCP ) {
|
|
this->recvThreadRingBufferSpaceAvailableEvent.signal ();
|
|
}
|
|
|
|
this->oldMsgHeaderAvailable = false;
|
|
this->msgHeaderAvailable = false;
|
|
this->curDataBytes = 0u;
|
|
}
|
|
}
|
|
|
|
inline void insertRequestHeader (
|
|
comQueSend &sendQue, ca_uint16_t request, ca_uint32_t payloadSize,
|
|
ca_uint16_t dataType, ca_uint32_t nElem, ca_uint32_t cid,
|
|
ca_uint32_t requestDependent, bool v49Ok )
|
|
{
|
|
if ( payloadSize < 0xffff && nElem < 0xffff ) {
|
|
sendQue.pushUInt16 ( request );
|
|
sendQue.pushUInt16 ( static_cast < ca_uint16_t > ( payloadSize ) );
|
|
sendQue.pushUInt16 ( dataType );
|
|
sendQue.pushUInt16 ( static_cast < ca_uint16_t > ( nElem ) );
|
|
sendQue.pushUInt32 ( cid );
|
|
sendQue.pushUInt32 ( requestDependent );
|
|
}
|
|
else if ( v49Ok ) {
|
|
sendQue.pushUInt16 ( request );
|
|
sendQue.pushUInt16 ( 0xffff );
|
|
sendQue.pushUInt16 ( dataType );
|
|
sendQue.pushUInt16 ( 0u );
|
|
sendQue.pushUInt32 ( cid );
|
|
sendQue.pushUInt32 ( requestDependent );
|
|
sendQue.pushUInt32 ( payloadSize );
|
|
sendQue.pushUInt32 ( nElem );
|
|
}
|
|
else {
|
|
throw cacChannel::outOfBounds ();
|
|
}
|
|
}
|
|
|
|
/*
|
|
* tcpiiu::hostNameSetRequest ()
|
|
*/
|
|
void tcpiiu::hostNameSetRequest ()
|
|
{
|
|
if ( ! CA_V41 ( this->minorProtocolVersion ) ) {
|
|
return;
|
|
}
|
|
|
|
const char *pName = localHostNameAtLoadTime.pointer ();
|
|
unsigned size = strlen ( pName ) + 1u;
|
|
unsigned postSize = CA_MESSAGE_ALIGN ( size );
|
|
assert ( postSize < 0xffff );
|
|
|
|
if ( this->sendQue.flushEarlyThreshold ( postSize + 16u ) ) {
|
|
this->flushRequest ();
|
|
}
|
|
|
|
epicsAutoMutex locker ( this->pCAC()->mutexRef() );
|
|
|
|
this->sendQue.pushUInt16 ( CA_PROTO_HOST_NAME ); // cmd
|
|
this->sendQue.pushUInt16 ( static_cast < ca_uint16_t > ( postSize ) ); // postsize
|
|
this->sendQue.pushUInt16 ( 0u ); // dataType
|
|
this->sendQue.pushUInt16 ( 0u ); // count
|
|
this->sendQue.pushUInt32 ( 0u ); // cid
|
|
this->sendQue.pushUInt32 ( 0u ); // available
|
|
this->sendQue.pushString ( pName, size );
|
|
this->sendQue.pushString ( nillBytes, postSize - size );
|
|
}
|
|
|
|
/*
|
|
* tcpiiu::userNameSetRequest ()
|
|
*/
|
|
void tcpiiu::userNameSetRequest ()
|
|
{
|
|
if ( ! CA_V41 ( this->minorProtocolVersion ) ) {
|
|
return;
|
|
}
|
|
|
|
const char *pName = this->pCAC ()->userNamePointer ();
|
|
unsigned size = strlen ( pName ) + 1u;
|
|
unsigned postSize = CA_MESSAGE_ALIGN ( size );
|
|
assert ( postSize < 0xffff );
|
|
|
|
if ( this->sendQue.flushEarlyThreshold ( postSize + 16u ) ) {
|
|
this->flushRequest ();
|
|
}
|
|
|
|
epicsAutoMutex locker ( this->pCAC()->mutexRef() );
|
|
this->sendQue.pushUInt16 ( CA_PROTO_CLIENT_NAME ); // cmd
|
|
this->sendQue.pushUInt16 ( postSize ); // postsize
|
|
this->sendQue.pushUInt16 ( 0u ); // dataType
|
|
this->sendQue.pushUInt16 ( 0u ); // count
|
|
this->sendQue.pushUInt32 ( 0u ); // cid
|
|
this->sendQue.pushUInt32 ( 0u ); // available
|
|
this->sendQue.pushString ( pName, size );
|
|
this->sendQue.pushString ( nillBytes, postSize - size );
|
|
}
|
|
|
|
void tcpiiu::disableFlowControlRequest ()
|
|
{
|
|
if ( this->sendQue.flushEarlyThreshold ( 16u ) ) {
|
|
this->flushRequest ();
|
|
}
|
|
|
|
epicsAutoMutex locker ( this->pCAC()->mutexRef() );
|
|
|
|
this->sendQue.pushUInt16 ( CA_PROTO_EVENTS_ON ); // cmd
|
|
this->sendQue.pushUInt16 ( 0u ); // postsize
|
|
this->sendQue.pushUInt16 ( 0u ); // dataType
|
|
this->sendQue.pushUInt16 ( 0u ); // count
|
|
this->sendQue.pushUInt32 ( 0u ); // cid
|
|
this->sendQue.pushUInt32 ( 0u ); // available
|
|
}
|
|
|
|
void tcpiiu::enableFlowControlRequest ()
|
|
{
|
|
if ( this->sendQue.flushEarlyThreshold ( 16u ) ) {
|
|
this->flushRequest ();
|
|
}
|
|
|
|
epicsAutoMutex locker ( this->pCAC()->mutexRef() );
|
|
|
|
this->sendQue.pushUInt16 ( CA_PROTO_EVENTS_OFF ); // cmd
|
|
this->sendQue.pushUInt16 ( 0u ); // postsize
|
|
this->sendQue.pushUInt16 ( 0u ); // dataType
|
|
this->sendQue.pushUInt16 ( 0u ); // count
|
|
this->sendQue.pushUInt32 ( 0u ); // cid
|
|
this->sendQue.pushUInt32 ( 0u ); // available
|
|
}
|
|
|
|
void tcpiiu::noopRequest ()
|
|
{
|
|
if ( this->sendQue.flushEarlyThreshold ( 16u ) ) {
|
|
this->flushRequest ();
|
|
}
|
|
|
|
epicsAutoMutex locker ( this->pCAC()->mutexRef() );
|
|
|
|
this->sendQue.pushUInt16 ( CA_PROTO_NOOP ); // cmd
|
|
this->sendQue.pushUInt16 ( 0u ); // postsize
|
|
this->sendQue.pushUInt16 ( 0u ); // dataType
|
|
this->sendQue.pushUInt16 ( 0u ); // count
|
|
this->sendQue.pushUInt32 ( 0u ); // cid
|
|
this->sendQue.pushUInt32 ( 0u ); // available
|
|
}
|
|
|
|
void tcpiiu::echoRequest ()
|
|
{
|
|
if ( this->sendQue.flushEarlyThreshold ( 16u ) ) {
|
|
this->flushRequest ();
|
|
}
|
|
|
|
epicsAutoMutex locker ( this->pCAC()->mutexRef() );
|
|
|
|
this->sendQue.pushUInt16 ( CA_PROTO_ECHO ); // cmd
|
|
this->sendQue.pushUInt16 ( 0u ); // postsize
|
|
this->sendQue.pushUInt16 ( 0u ); // dataType
|
|
this->sendQue.pushUInt16 ( 0u ); // count
|
|
this->sendQue.pushUInt32 ( 0u ); // cid
|
|
this->sendQue.pushUInt32 ( 0u ); // available
|
|
}
|
|
|
|
inline void insertRequestWithPayLoad (
|
|
comQueSend &sendQue, ca_uint16_t request,
|
|
unsigned dataType, ca_uint32_t nElem, ca_uint32_t cid,
|
|
ca_uint32_t requestDependent, const void *pPayload,
|
|
bool v49Ok )
|
|
{
|
|
if ( ! sendQue.dbr_type_ok ( dataType ) ) {
|
|
throw cacChannel::badType();
|
|
}
|
|
ca_uint32_t size;
|
|
bool stringOptim;
|
|
if ( dataType == DBR_STRING && nElem == 1 ) {
|
|
const char *pStr = static_cast < const char * > ( pPayload );
|
|
size = strlen ( pStr ) + 1u;
|
|
if ( size > MAX_STRING_SIZE ) {
|
|
throw cacChannel::outOfBounds();
|
|
}
|
|
stringOptim = true;
|
|
}
|
|
else {
|
|
unsigned maxBytes;
|
|
if ( v49Ok ) {
|
|
maxBytes = 0xffffffff;
|
|
}
|
|
else {
|
|
maxBytes = MAX_TCP;
|
|
}
|
|
unsigned maxElem = ( maxBytes - dbr_size[dataType] ) / dbr_value_size[dataType];
|
|
if ( nElem >= maxElem ) {
|
|
throw cacChannel::outOfBounds();
|
|
}
|
|
size = dbr_size_n ( dataType, nElem );
|
|
stringOptim = false;
|
|
}
|
|
ca_uint32_t payloadSize = CA_MESSAGE_ALIGN ( size );
|
|
insertRequestHeader ( sendQue, request, payloadSize,
|
|
static_cast <ca_uint16_t> ( dataType ),
|
|
nElem, cid, requestDependent, v49Ok );
|
|
if ( stringOptim ) {
|
|
sendQue.pushString ( static_cast < const char * > ( pPayload ), size );
|
|
}
|
|
else {
|
|
sendQue.push_dbr_type ( dataType, pPayload, nElem );
|
|
}
|
|
sendQue.pushString ( nillBytes, payloadSize - size );
|
|
}
|
|
|
|
void tcpiiu::writeRequest ( nciu &chan, unsigned type, unsigned nElem, const void *pValue )
|
|
{
|
|
if ( ! chan.connected () ) {
|
|
throw cacChannel::notConnected();
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|
}
|
|
insertRequestWithPayLoad ( this->sendQue, CA_PROTO_WRITE,
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|
type, nElem, chan.getSID(), chan.getCID(), pValue,
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|
CA_V49 ( this->minorProtocolVersion ) );
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|
}
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|
|
|
|
|
void tcpiiu::writeNotifyRequest ( nciu &chan, netWriteNotifyIO &io, unsigned type,
|
|
unsigned nElem, const void *pValue )
|
|
{
|
|
if ( ! chan.connected () ) {
|
|
throw cacChannel::notConnected();
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|
}
|
|
if ( ! this->ca_v41_ok () ) {
|
|
throw cacChannel::unsupportedByService();
|
|
}
|
|
insertRequestWithPayLoad ( this->sendQue, CA_PROTO_WRITE_NOTIFY,
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|
type, nElem, chan.getSID(), io.getID(), pValue,
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|
CA_V49 ( this->minorProtocolVersion ) );
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|
}
|
|
|
|
void tcpiiu::readNotifyRequest ( nciu &chan, netReadNotifyIO &io,
|
|
unsigned dataType, unsigned nElem )
|
|
{
|
|
if ( ! chan.connected () ) {
|
|
throw cacChannel::notConnected ();
|
|
}
|
|
if ( ! dbr_type_is_valid ( dataType ) ) {
|
|
throw cacChannel::badType();
|
|
}
|
|
if ( nElem > chan.nativeElementCount() ) {
|
|
throw cacChannel::outOfBounds ();
|
|
}
|
|
unsigned maxBytes;
|
|
if ( CA_V49 ( this->minorProtocolVersion ) ) {
|
|
maxBytes = this->pCAC()->largeBufferSizeTCP ();
|
|
}
|
|
else {
|
|
maxBytes = MAX_TCP;
|
|
}
|
|
unsigned maxElem = ( maxBytes - dbr_size[dataType] ) / dbr_value_size[dataType];
|
|
if ( nElem > maxElem ) {
|
|
throw cacChannel::msgBodyCacheTooSmall ();
|
|
}
|
|
insertRequestHeader ( this->sendQue,
|
|
CA_PROTO_READ_NOTIFY, 0u,
|
|
static_cast < ca_uint16_t > ( dataType ),
|
|
nElem, chan.getSID(), io.getID(),
|
|
CA_V49 ( this->minorProtocolVersion ) );
|
|
}
|
|
|
|
void tcpiiu::createChannelRequest ( nciu &chan )
|
|
{
|
|
const char *pName;
|
|
unsigned nameLength;
|
|
ca_uint32_t identity;
|
|
if ( this->ca_v44_ok () ) {
|
|
identity = chan.getCID ();
|
|
pName = chan.pName ();
|
|
nameLength = chan.nameLen ();
|
|
}
|
|
else {
|
|
identity = chan.getSID ();
|
|
pName = 0;
|
|
nameLength = 0u;
|
|
}
|
|
|
|
unsigned postCnt = CA_MESSAGE_ALIGN ( nameLength );
|
|
|
|
if ( postCnt >= 0xffff ) {
|
|
throw cacChannel::unsupportedByService();
|
|
}
|
|
|
|
this->sendQue.pushUInt16 ( CA_PROTO_CLAIM_CIU ); // cmd
|
|
this->sendQue.pushUInt16 ( postCnt ); // postsize
|
|
this->sendQue.pushUInt16 ( 0u ); // dataType
|
|
this->sendQue.pushUInt16 ( 0u ); // count
|
|
this->sendQue.pushUInt32 ( identity ); // cid
|
|
//
|
|
// The available field is used (abused)
|
|
// here to communicate the minor version number
|
|
// starting with CA 4.1.
|
|
//
|
|
this->sendQue.pushUInt32 ( CA_MINOR_PROTOCOL_REVISION ); // available
|
|
if ( nameLength ) {
|
|
this->sendQue.pushString ( pName, nameLength );
|
|
}
|
|
if ( postCnt > nameLength ) {
|
|
this->sendQue.pushString ( nillBytes, postCnt - nameLength );
|
|
}
|
|
}
|
|
|
|
void tcpiiu::clearChannelRequest ( nciu &chan )
|
|
{
|
|
if ( chan.connected () ) {
|
|
this->sendQue.pushUInt16 ( CA_PROTO_CLEAR_CHANNEL ); // cmd
|
|
this->sendQue.pushUInt16 ( 0u ); // postsize
|
|
this->sendQue.pushUInt16 ( 0u ); // dataType
|
|
this->sendQue.pushUInt16 ( 0u ); // count
|
|
this->sendQue.pushUInt32 ( chan.getSID () ); // cid
|
|
this->sendQue.pushUInt32 ( chan.getCID () ); // available
|
|
}
|
|
}
|
|
|
|
//
|
|
// this routine return void because if this internally fails the best response
|
|
// is to try again the next time that we reconnect
|
|
//
|
|
void tcpiiu::subscriptionRequest ( nciu &chan, netSubscription & subscr )
|
|
{
|
|
if ( ! chan.connected() ) {
|
|
return;
|
|
}
|
|
unsigned mask = subscr.getMask();
|
|
if ( mask > 0xffff ) {
|
|
mask &= 0xffff;
|
|
this->pCAC()->printf ( "CAC: subscriptionRequest() truncated unusual event select mask\n" );
|
|
}
|
|
arrayElementCount nElem = subscr.getCount ();
|
|
unsigned maxBytes;
|
|
if ( CA_V49 ( this->minorProtocolVersion ) ) {
|
|
maxBytes = this->pCAC()->largeBufferSizeTCP ();
|
|
}
|
|
else {
|
|
maxBytes = MAX_TCP;
|
|
}
|
|
unsigned dataType = subscr.getType ();
|
|
unsigned maxElem = ( maxBytes - dbr_size[dataType] ) / dbr_value_size[dataType];
|
|
if ( nElem > maxElem ) {
|
|
throw cacChannel::msgBodyCacheTooSmall ();
|
|
}
|
|
insertRequestHeader ( this->sendQue,
|
|
CA_PROTO_EVENT_ADD, 16u,
|
|
static_cast < ca_uint16_t > ( dataType ),
|
|
nElem, chan.getSID(), subscr.getID(),
|
|
CA_V49 ( this->minorProtocolVersion ) );
|
|
|
|
// extension
|
|
this->sendQue.pushFloat32 ( 0.0 ); // m_lval
|
|
this->sendQue.pushFloat32 ( 0.0 ); // m_hval
|
|
this->sendQue.pushFloat32 ( 0.0 ); // m_toval
|
|
this->sendQue.pushUInt16 ( static_cast < ca_uint16_t > ( mask ) ); // m_mask
|
|
this->sendQue.pushUInt16 ( 0u ); // m_pad
|
|
}
|
|
|
|
void tcpiiu::subscriptionCancelRequest ( nciu &chan, netSubscription &subscr )
|
|
{
|
|
insertRequestHeader ( this->sendQue,
|
|
CA_PROTO_EVENT_CANCEL, 0u,
|
|
static_cast < ca_uint16_t > ( subscr.getType () ),
|
|
static_cast < ca_uint16_t > ( subscr.getCount () ),
|
|
chan.getSID(), subscr.getID(),
|
|
CA_V49 ( this->minorProtocolVersion ) );
|
|
}
|
|
|
|
void tcpiiu::lastChannelDetachNotify ()
|
|
{
|
|
this->cleanShutdown ();
|
|
}
|
|
|
|
bool tcpiiu::flush ()
|
|
{
|
|
while ( true ) {
|
|
comBuf * pBuf;
|
|
|
|
{
|
|
epicsAutoMutex autoMutex ( this->pCAC()->mutexRef() );
|
|
pBuf = this->sendQue.popNextComBufToSend ();
|
|
if ( pBuf ) {
|
|
this->unacknowledgedSendBytes += pBuf->occupiedBytes ();
|
|
if ( this->unacknowledgedSendBytes >
|
|
this->socketLibrarySendBufferSize ) {
|
|
this->recvDog.sendBacklogProgressNotify ();
|
|
}
|
|
}
|
|
else {
|
|
if ( this->blockingForFlush ) {
|
|
this->flushBlockEvent.signal ();
|
|
}
|
|
this->earlyFlush = false;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
bool success = pBuf->flushToWire ( *this );
|
|
|
|
pBuf->destroy ();
|
|
|
|
if ( ! success ) {
|
|
epicsAutoMutex autoMutex ( this->pCAC()->mutexRef() );
|
|
while ( ( pBuf = this->sendQue.popNextComBufToSend () ) ) {
|
|
pBuf->destroy ();
|
|
}
|
|
if ( this->blockingForFlush ) {
|
|
this->flushBlockEvent.signal ();
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
void tcpiiu::blockUntilSendBacklogIsReasonable ( epicsMutex &mutex )
|
|
{
|
|
this->pCAC()->enableCallbackPreemption ();
|
|
assert ( this->blockingForFlush < UINT_MAX );
|
|
this->blockingForFlush++;
|
|
while ( this->sendQue.flushBlockThreshold(0u) && this->state == iiu_connected ) {
|
|
epicsAutoMutexRelease autoRelease ( mutex );
|
|
this->flushBlockEvent.wait ( 5.0 );
|
|
}
|
|
assert ( this->blockingForFlush > 0u );
|
|
this->blockingForFlush--;
|
|
if ( this->blockingForFlush ) {
|
|
this->flushBlockEvent.signal ();
|
|
}
|
|
{
|
|
epicsAutoMutexRelease autoRelease ( mutex );
|
|
this->pCAC()->disableCallbackPreemption ();
|
|
}
|
|
}
|
|
|
|
void tcpiiu::flushRequestIfAboveEarlyThreshold ()
|
|
{
|
|
if ( ! this->earlyFlush && this->sendQue.flushEarlyThreshold(0u) ) {
|
|
this->earlyFlush = true;
|
|
this->sendThreadFlushEvent.signal ();
|
|
}
|
|
}
|
|
|
|
bool tcpiiu::flushBlockThreshold () const
|
|
{
|
|
return this->sendQue.flushBlockThreshold ( 0u );
|
|
}
|
|
|
|
double tcpiiu::beaconPeriod () const
|
|
{
|
|
return this->BHE.period ();
|
|
}
|
|
|
|
// not inline because its virtual
|
|
bool tcpiiu::ca_v42_ok () const
|
|
{
|
|
return CA_V42 ( this->minorProtocolVersion );
|
|
}
|
|
|
|
|
|
|
|
|