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XrdClXRootDTransport.cc
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XrdClXRootDTransport.cc
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//------------------------------------------------------------------------------
// Copyright (c) 2011-2014 by European Organization for Nuclear Research (CERN)
// Author: Lukasz Janyst <ljanyst@cern.ch>
//------------------------------------------------------------------------------
// This file is part of the XRootD software suite.
//
// XRootD is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// XRootD is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with XRootD. If not, see <http://www.gnu.org/licenses/>.
//
// In applying this licence, CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
//------------------------------------------------------------------------------
#include "XrdCl/XrdClXRootDTransport.hh"
#include "XrdCl/XrdClConstants.hh"
#include "XrdCl/XrdClLog.hh"
#include "XrdCl/XrdClSocket.hh"
#include "XrdCl/XrdClMessage.hh"
#include "XrdCl/XrdClDefaultEnv.hh"
#include "XrdCl/XrdClSIDManager.hh"
#include "XrdCl/XrdClUtils.hh"
#include "XrdCl/XrdClTransportManager.hh"
#include "XrdNet/XrdNetAddr.hh"
#include "XrdNet/XrdNetUtils.hh"
#include "XrdSys/XrdSysPlatform.hh"
#include "XrdOuc/XrdOucErrInfo.hh"
#include "XrdOuc/XrdOucUtils.hh"
#include "XrdSys/XrdSysTimer.hh"
#include "XrdSys/XrdSysPlugin.hh"
#include "XrdSec/XrdSecLoadSecurity.hh"
#include "XrdSec/XrdSecProtect.hh"
#include "XrdVersion.hh"
#include <arpa/inet.h>
#include <sys/types.h>
#include <unistd.h>
#include <dlfcn.h>
#include <sstream>
#include <iomanip>
#include <set>
XrdVERSIONINFOREF( XrdCl );
namespace XrdCl
{
struct PluginUnloadHandler
{
PluginUnloadHandler() : unloaded( false ) { }
static void UnloadHandler()
{
UnloadHandler( "root" );
UnloadHandler( "xroot" );
}
static void UnloadHandler( const std::string &trProt )
{
TransportManager *trManager = DefaultEnv::GetTransportManager();
TransportHandler *trHandler = trManager->GetHandler( trProt );
XRootDTransport *xrdTransport = dynamic_cast<XRootDTransport*>( trHandler );
if( !xrdTransport ) return;
PluginUnloadHandler *me = xrdTransport->pSecUnloadHandler;
XrdSysRWLockHelper scope( me->lock, false ); // obtain write lock
me->unloaded = true;
}
void Register( const std::string &protocol )
{
XrdSysRWLockHelper scope( lock, false ); // obtain write lock
std::pair< std::set<std::string>::iterator, bool > ret = protocols.insert( protocol );
// if that's the first time we are using the protocol, the sec lib
// was just loaded so now's the time to register the atexit handler
if( ret.second )
{
atexit( UnloadHandler );
}
}
XrdSysRWLock lock;
bool unloaded;
std::set<std::string> protocols;
};
//----------------------------------------------------------------------------
//! Information holder for XRootDStreams
//----------------------------------------------------------------------------
struct XRootDStreamInfo
{
//--------------------------------------------------------------------------
// Define the stream status for the link negotiation purposes
//--------------------------------------------------------------------------
enum StreamStatus
{
Disconnected,
Broken,
HandShakeSent,
HandShakeReceived,
LoginSent,
AuthSent,
BindSent,
EndSessionSent,
Connected
};
//--------------------------------------------------------------------------
// Constructor
//--------------------------------------------------------------------------
XRootDStreamInfo(): status( Disconnected ), pathId( 0 )
{
}
StreamStatus status;
uint8_t pathId;
};
//----------------------------------------------------------------------------
//! Information holder for xrootd channels
//----------------------------------------------------------------------------
struct XRootDChannelInfo
{
//--------------------------------------------------------------------------
// Constructor
//--------------------------------------------------------------------------
XRootDChannelInfo():
serverFlags(0),
protocolVersion(0),
firstLogIn(true),
sidManager(0),
authBuffer(0),
authProtocol(0),
authParams(0),
authEnv(0),
openFiles(0),
waitBarrier(0),
protection(0),
protRespBody(0),
protRespSize(0)
{
sidManager = new SIDManager();
memset( sessionId, 0, 16 );
memset( oldSessionId, 0, 16 );
}
//--------------------------------------------------------------------------
// Destructor
//--------------------------------------------------------------------------
~XRootDChannelInfo()
{
delete sidManager;
delete [] authBuffer;
}
typedef std::vector<XRootDStreamInfo> StreamInfoVector;
//--------------------------------------------------------------------------
// Data
//--------------------------------------------------------------------------
uint32_t serverFlags;
uint32_t protocolVersion;
uint8_t sessionId[16];
uint8_t oldSessionId[16];
bool firstLogIn;
SIDManager *sidManager;
char *authBuffer;
XrdSecProtocol *authProtocol;
XrdSecParameters *authParams;
XrdOucEnv *authEnv;
StreamInfoVector stream;
std::string streamName;
std::string authProtocolName;
std::set<uint16_t> sentOpens;
std::set<uint16_t> sentCloses;
uint32_t openFiles;
time_t waitBarrier;
XrdSecProtect *protection;
ServerResponseBody_Protocol *protRespBody;
unsigned int protRespSize;
XrdSysMutex mutex;
};
//----------------------------------------------------------------------------
// Constructor
//----------------------------------------------------------------------------
XRootDTransport::XRootDTransport():
pAuthHandler(0),
pSecUnloadHandler( new PluginUnloadHandler() )
{
}
//----------------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------------
XRootDTransport::~XRootDTransport()
{
delete pSecUnloadHandler; pSecUnloadHandler = 0;
}
//----------------------------------------------------------------------------
// Read message header
//----------------------------------------------------------------------------
Status XRootDTransport::GetHeader( Message *message, int socket )
{
//--------------------------------------------------------------------------
// A new message - allocate the space needed for the header
//--------------------------------------------------------------------------
if( message->GetCursor() == 0 && message->GetSize() < 8 )
message->Allocate( 8 );
//--------------------------------------------------------------------------
// Read the message header
//--------------------------------------------------------------------------
if( message->GetCursor() < 8 )
{
uint32_t leftToBeRead = 8-message->GetCursor();
while( leftToBeRead )
{
int status = ::read( socket, message->GetBufferAtCursor(), leftToBeRead );
if( status < 0 && (errno == EAGAIN || errno == EWOULDBLOCK) )
return Status( stOK, suRetry );
if( status <= 0 )
return Status( stError, errSocketError, errno );
leftToBeRead -= status;
message->AdvanceCursor( status );
}
UnMarshallHeader( message );
uint32_t bodySize = *(uint32_t*)(message->GetBuffer(4));
Log *log = DefaultEnv::GetLog();
log->Dump( XRootDTransportMsg, "[msg: 0x%x] Expecting %d bytes of message "
"body", message, bodySize );
return Status( stOK, suDone );
}
return Status( stError, errInternal );
}
//----------------------------------------------------------------------------
// Read message body
//----------------------------------------------------------------------------
Status XRootDTransport::GetBody( Message *message, int socket )
{
//--------------------------------------------------------------------------
// Retrieve the body
//--------------------------------------------------------------------------
uint32_t leftToBeRead = 0;
uint32_t bodySize = *(uint32_t*)(message->GetBuffer(4));
if( message->GetCursor() == 8 )
message->ReAllocate( bodySize + 8 );
leftToBeRead = bodySize-(message->GetCursor()-8);
while( leftToBeRead )
{
int status = ::read( socket, message->GetBufferAtCursor(), leftToBeRead );
if( status < 0 && (errno == EAGAIN || errno == EWOULDBLOCK) )
return Status( stOK, suRetry );
if( status <= 0 )
return Status( stError, errSocketError, errno );
leftToBeRead -= status;
message->AdvanceCursor( status );
}
return Status( stOK, suDone );
}
//----------------------------------------------------------------------------
// Initialize channel
//----------------------------------------------------------------------------
void XRootDTransport::InitializeChannel( AnyObject &channelData )
{
XRootDChannelInfo *info = new XRootDChannelInfo();
XrdSysMutexHelper scopedLock( info->mutex );
channelData.Set( info );
Env *env = DefaultEnv::GetEnv();
int streams = DefaultSubStreamsPerChannel;
env->GetInt( "SubStreamsPerChannel", streams );
if( streams < 1 ) streams = 1;
info->stream.resize( streams );
}
//----------------------------------------------------------------------------
// Finalize channel
//----------------------------------------------------------------------------
void XRootDTransport::FinalizeChannel( AnyObject & )
{
}
//----------------------------------------------------------------------------
// HandShake
//----------------------------------------------------------------------------
Status XRootDTransport::HandShake( HandShakeData *handShakeData,
AnyObject &channelData )
{
XRootDChannelInfo *info = 0;
channelData.Get( info );
XrdSysMutexHelper scopedLock( info->mutex );
if( info->stream.size() <= handShakeData->subStreamId )
{
Log *log = DefaultEnv::GetLog();
log->Error( XRootDTransportMsg,
"[%s] Internal error: not enough substreams",
handShakeData->streamName.c_str() );
return Status( stFatal, errInternal );
}
if( handShakeData->subStreamId == 0 )
{
info->streamName = handShakeData->streamName;
return HandShakeMain( handShakeData, channelData );
}
return HandShakeParallel( handShakeData, channelData );
}
//----------------------------------------------------------------------------
// Hand shake the main stream
//----------------------------------------------------------------------------
Status XRootDTransport::HandShakeMain( HandShakeData *handShakeData,
AnyObject &channelData )
{
XRootDChannelInfo *info = 0;
channelData.Get( info );
XRootDStreamInfo &sInfo = info->stream[handShakeData->subStreamId];
//--------------------------------------------------------------------------
// First step - we need to create and initial handshake and send it out
//--------------------------------------------------------------------------
if( sInfo.status == XRootDStreamInfo::Disconnected ||
sInfo.status == XRootDStreamInfo::Broken )
{
handShakeData->out = GenerateInitialHSProtocol( handShakeData, info );
sInfo.status = XRootDStreamInfo::HandShakeSent;
return Status( stOK, suContinue );
}
//--------------------------------------------------------------------------
// Second step - we got the reply message to the initial handshake
//--------------------------------------------------------------------------
if( sInfo.status == XRootDStreamInfo::HandShakeSent )
{
Status st = ProcessServerHS( handShakeData, info );
if( st.IsOK() )
sInfo.status = XRootDStreamInfo::HandShakeReceived;
else
sInfo.status = XRootDStreamInfo::Broken;
return st;
}
//--------------------------------------------------------------------------
// Third step - we got the response to the protocol request, we need
// to process it and send out a login request
//--------------------------------------------------------------------------
if( sInfo.status == XRootDStreamInfo::HandShakeReceived )
{
Status st = ProcessProtocolResp( handShakeData, info );
if( !st.IsOK() )
{
sInfo.status = XRootDStreamInfo::Broken;
return st;
}
handShakeData->out = GenerateLogIn( handShakeData, info );
sInfo.status = XRootDStreamInfo::LoginSent;
return Status( stOK, suContinue );
}
//--------------------------------------------------------------------------
// Fourth step - handle the log in response and proceed with the
// authentication if required by the server
//--------------------------------------------------------------------------
if( sInfo.status == XRootDStreamInfo::LoginSent )
{
Status st = ProcessLogInResp( handShakeData, info );
if( !st.IsOK() )
{
sInfo.status = XRootDStreamInfo::Broken;
return st;
}
if( st.IsOK() && st.code == suDone )
{
//----------------------------------------------------------------------
// If it's not our first log in we need to end the previous session
// to make sure that the server noticed our disconnection and closed
// all the writable handles that we owned
//----------------------------------------------------------------------
if( !info->firstLogIn )
{
handShakeData->out = GenerateEndSession( handShakeData, info );
sInfo.status = XRootDStreamInfo::EndSessionSent;
return Status( stOK, suContinue );
}
sInfo.status = XRootDStreamInfo::Connected;
info->firstLogIn = false;
return st;
}
st = DoAuthentication( handShakeData, info );
if( !st.IsOK() )
sInfo.status = XRootDStreamInfo::Broken;
else
sInfo.status = XRootDStreamInfo::AuthSent;
return st;
}
//--------------------------------------------------------------------------
// Fifth step and later - proceed with the authentication
//--------------------------------------------------------------------------
if( sInfo.status == XRootDStreamInfo::AuthSent )
{
Status st = DoAuthentication( handShakeData, info );
if( !st.IsOK() )
{
sInfo.status = XRootDStreamInfo::Broken;
return st;
}
if( st.IsOK() && st.code == suDone )
{
//----------------------------------------------------------------------
// If it's not our first log in we need to end the previous session
//----------------------------------------------------------------------
if( !info->firstLogIn )
{
handShakeData->out = GenerateEndSession( handShakeData, info );
sInfo.status = XRootDStreamInfo::EndSessionSent;
return Status( stOK, suContinue );
}
sInfo.status = XRootDStreamInfo::Connected;
info->firstLogIn = false;
return st;
}
return st;
}
//--------------------------------------------------------------------------
// The last step - kXR_endsess returned
//--------------------------------------------------------------------------
if( sInfo.status == XRootDStreamInfo::EndSessionSent )
{
Status st = ProcessEndSessionResp( handShakeData, info );
if( st.IsOK() && st.code == suDone )
{
sInfo.status = XRootDStreamInfo::Connected;
}
else if( !st.IsOK() )
{
sInfo.status = XRootDStreamInfo::Broken;
}
return st;
}
return Status( stOK, suDone );
}
//----------------------------------------------------------------------------
// Hand shake parallel stream
//----------------------------------------------------------------------------
Status XRootDTransport::HandShakeParallel( HandShakeData *handShakeData,
AnyObject &channelData )
{
XRootDChannelInfo *info = 0;
channelData.Get( info );
XRootDStreamInfo &sInfo = info->stream[handShakeData->subStreamId];
//--------------------------------------------------------------------------
// First step - we need to create and initial handshake and send it out
//--------------------------------------------------------------------------
if( sInfo.status == XRootDStreamInfo::Disconnected ||
sInfo.status == XRootDStreamInfo::Broken )
{
handShakeData->out = GenerateInitialHS( handShakeData, info );
sInfo.status = XRootDStreamInfo::HandShakeSent;
return Status( stOK, suContinue );
}
//--------------------------------------------------------------------------
// Second step - we got the reply message to the initial handshake,
// if successful we need to send bind
//--------------------------------------------------------------------------
if( sInfo.status == XRootDStreamInfo::HandShakeSent )
{
Status st = ProcessServerHS( handShakeData, info );
if( st.IsOK() )
{
sInfo.status = XRootDStreamInfo::BindSent;
handShakeData->out = GenerateBind( handShakeData, info );
return Status( stOK, suContinue );
}
sInfo.status = XRootDStreamInfo::Broken;
return st;
}
//--------------------------------------------------------------------------
// Third step - we got the response to the kXR_bind
//--------------------------------------------------------------------------
if( sInfo.status == XRootDStreamInfo::BindSent )
{
Status st = ProcessBindResp( handShakeData, info );
if( !st.IsOK() )
{
sInfo.status = XRootDStreamInfo::Broken;
return st;
}
sInfo.status = XRootDStreamInfo::Connected;
return Status();
}
return Status();
}
//----------------------------------------------------------------------------
// Check if the stream should be disconnected
//----------------------------------------------------------------------------
bool XRootDTransport::IsStreamTTLElapsed( time_t inactiveTime,
uint16_t streamId,
AnyObject &channelData )
{
XRootDChannelInfo *info = 0;
channelData.Get( info );
Env *env = DefaultEnv::GetEnv();
Log *log = DefaultEnv::GetLog();
//--------------------------------------------------------------------------
// Check the TTL settings for the current server
//--------------------------------------------------------------------------
int ttl;
if( info->serverFlags & kXR_isServer )
{
ttl = DefaultDataServerTTL;
env->GetInt( "DataServerTTL", ttl );
}
else
{
ttl = DefaultLoadBalancerTTL;
env->GetInt( "LoadBalancerTTL", ttl );
}
//--------------------------------------------------------------------------
// See whether we can give a go-ahead for the disconnection
//--------------------------------------------------------------------------
XrdSysMutexHelper scopedLock( info->mutex );
uint16_t allocatedSIDs = info->sidManager->GetNumberOfAllocatedSIDs();
log->Dump( XRootDTransportMsg, "[%s] Stream inactive since %d seconds, "
"TTL: %d, allocated SIDs: %d, open files: %d",
info->streamName.c_str(), inactiveTime, ttl, allocatedSIDs,
info->openFiles );
if( info->openFiles )
return false;
if( !allocatedSIDs && inactiveTime > ttl )
return true;
return false;
}
//----------------------------------------------------------------------------
// Check the stream is broken - ie. TCP connection got broken and
// went undetected by the TCP stack
//----------------------------------------------------------------------------
Status XRootDTransport::IsStreamBroken( time_t inactiveTime,
uint16_t streamId,
AnyObject &channelData )
{
XRootDChannelInfo *info = 0;
channelData.Get( info );
Env *env = DefaultEnv::GetEnv();
Log *log = DefaultEnv::GetLog();
int streamTimeout = DefaultStreamTimeout;
env->GetInt( "StreamTimeout", streamTimeout );
XrdSysMutexHelper scopedLock( info->mutex );
uint16_t allocatedSIDs = info->sidManager->GetNumberOfAllocatedSIDs();
log->Dump( XRootDTransportMsg, "[%s] Stream inactive since %d seconds, "
"stream timeout: %d, allocated SIDs: %d, wait barrier: %s",
info->streamName.c_str(), inactiveTime, streamTimeout,
allocatedSIDs, Utils::TimeToString(info->waitBarrier).c_str() );
if( inactiveTime < streamTimeout )
return Status();
if( time(0) < info->waitBarrier )
return Status();
if( !allocatedSIDs )
return Status();
return Status( stError, errSocketError );
}
//----------------------------------------------------------------------------
// Multiplex
//----------------------------------------------------------------------------
PathID XRootDTransport::Multiplex( Message *, AnyObject &, PathID * )
{
return PathID( 0, 0 );
}
//----------------------------------------------------------------------------
// Multiplex
//----------------------------------------------------------------------------
PathID XRootDTransport::MultiplexSubStream( Message *msg,
uint16_t streamId,
AnyObject &channelData,
PathID *hint )
{
XRootDChannelInfo *info = 0;
channelData.Get( info );
XrdSysMutexHelper scopedLock( info->mutex );
//--------------------------------------------------------------------------
// If we're not connected to a data server or we don't know that yet
// we stream through 0
//--------------------------------------------------------------------------
if( !(info->serverFlags & kXR_isServer) || info->stream.size() == 0 )
return PathID( 0, 0 );
//--------------------------------------------------------------------------
// Select the streams
//--------------------------------------------------------------------------
Log *log = DefaultEnv::GetLog();
uint16_t upStream = 0;
uint16_t downStream = 0;
if( hint )
{
upStream = hint->up;
downStream = hint->down;
}
else
{
upStream = 0;
std::vector<uint16_t> connected;
for( size_t i = 1; i < info->stream.size(); ++i )
if( info->stream[i].status == XRootDStreamInfo::Connected )
connected.push_back( i );
if( connected.empty() )
downStream = 0;
else
downStream = connected[random()%connected.size()];
}
if( upStream >= info->stream.size() )
{
log->Debug( XRootDTransportMsg,
"[%s] Up link stream %d does not exist, using 0",
info->streamName.c_str(), upStream );
upStream = 0;
}
if( downStream >= info->stream.size() )
{
log->Debug( XRootDTransportMsg,
"[%s] Down link stream %d does not exist, using 0",
info->streamName.c_str(), downStream );
downStream = 0;
}
//--------------------------------------------------------------------------
// Modify the message
//--------------------------------------------------------------------------
UnMarshallRequest( msg );
ClientRequestHdr *hdr = (ClientRequestHdr*)msg->GetBuffer();
switch( hdr->requestid )
{
//------------------------------------------------------------------------
// Read - we update the path id to tell the server where we want to
// get the response, but we still send the request through stream 0
// We need to allocate space for read_args if we don't have it
// included yet
//------------------------------------------------------------------------
case kXR_read:
{
if( msg->GetSize() < sizeof(ClientReadRequest) + 8 )
{
msg->ReAllocate( sizeof(ClientReadRequest) + 8 );
void *newBuf = msg->GetBuffer(sizeof(ClientReadRequest));
memset( newBuf, 0, 8 );
ClientReadRequest *req = (ClientReadRequest*)msg->GetBuffer();
req->dlen += 8;
}
read_args *args = (read_args*)msg->GetBuffer(sizeof(ClientReadRequest));
args->pathid = info->stream[downStream].pathId;
break;
}
//------------------------------------------------------------------------
// ReadV - the situation is identical to read but we don't need any
// additional structures to specify the return path
//------------------------------------------------------------------------
case kXR_readv:
{
ClientReadVRequest *req = (ClientReadVRequest*)msg->GetBuffer();
req->pathid = info->stream[downStream].pathId;
break;
}
//------------------------------------------------------------------------
// Write - multiplexing writes doesn't work properly in the server
//------------------------------------------------------------------------
case kXR_write:
{
// ClientWriteRequest *req = (ClientWriteRequest*)msg->GetBuffer();
// req->pathid = info->stream[downStream].pathId;
break;
}
};
MarshallRequest( msg );
return PathID( upStream, downStream );
}
//----------------------------------------------------------------------------
// Return a number of streams that should be created - we always have
// one primary stream
//----------------------------------------------------------------------------
uint16_t XRootDTransport::StreamNumber( AnyObject &/*channelData*/ )
{
return 1;
}
//----------------------------------------------------------------------------
// Return a number of substreams per stream that should be created
// This depends on the environment and whether we are connected to
// a data server or not
//----------------------------------------------------------------------------
uint16_t XRootDTransport::SubStreamNumber( AnyObject &channelData )
{
XRootDChannelInfo *info = 0;
channelData.Get( info );
XrdSysMutexHelper scopedLock( info->mutex );
if( info->serverFlags & kXR_isServer )
return info->stream.size();
return 1;
}
//----------------------------------------------------------------------------
// Marshall
//----------------------------------------------------------------------------
Status XRootDTransport::MarshallRequest( Message *msg )
{
ClientRequest *req = (ClientRequest*)msg->GetBuffer();
switch( req->header.requestid )
{
//------------------------------------------------------------------------
// kXR_protocol
//------------------------------------------------------------------------
case kXR_protocol:
req->protocol.clientpv = htonl( req->protocol.clientpv );
break;
//------------------------------------------------------------------------
// kXR_login
//------------------------------------------------------------------------
case kXR_login:
req->login.pid = htonl( req->login.pid );
break;
//------------------------------------------------------------------------
// kXR_locate
//------------------------------------------------------------------------
case kXR_locate:
req->locate.options = htons( req->locate.options );
break;
//------------------------------------------------------------------------
// kXR_query
//------------------------------------------------------------------------
case kXR_query:
req->query.infotype = htons( req->query.infotype );
break;
//------------------------------------------------------------------------
// kXR_truncate
//------------------------------------------------------------------------
case kXR_truncate:
req->truncate.offset = htonll( req->truncate.offset );
break;
//------------------------------------------------------------------------
// kXR_mkdir
//------------------------------------------------------------------------
case kXR_mkdir:
req->mkdir.mode = htons( req->mkdir.mode );
break;
//------------------------------------------------------------------------
// kXR_chmod
//------------------------------------------------------------------------
case kXR_chmod:
req->chmod.mode = htons( req->chmod.mode );
break;
//------------------------------------------------------------------------
// kXR_open
//------------------------------------------------------------------------
case kXR_open:
req->open.mode = htons( req->open.mode );
req->open.options = htons( req->open.options );
break;
//------------------------------------------------------------------------
// kXR_read
//------------------------------------------------------------------------
case kXR_read:
req->read.offset = htonll( req->read.offset );
req->read.rlen = htonl( req->read.rlen );
break;
//------------------------------------------------------------------------
// kXR_write
//------------------------------------------------------------------------
case kXR_write:
req->write.offset = htonll( req->write.offset );
break;
//------------------------------------------------------------------------
// kXR_mv
//------------------------------------------------------------------------
case kXR_mv:
req->mv.arg1len = htons( req->mv.arg1len );
break;
//------------------------------------------------------------------------
// kXR_readv
//------------------------------------------------------------------------
case kXR_readv:
{
uint16_t numChunks = (req->readv.dlen)/16;
readahead_list *dataChunk = (readahead_list*)msg->GetBuffer( 24 );
for( size_t i = 0; i < numChunks; ++i )
{
dataChunk[i].rlen = htonl( dataChunk[i].rlen );
dataChunk[i].offset = htonll( dataChunk[i].offset );
}
}
};
req->header.requestid = htons( req->header.requestid );
req->header.dlen = htonl( req->header.dlen );
msg->SetIsMarshalled( true );
return Status();
}
//----------------------------------------------------------------------------
// Unmarshall the request - sometimes the requests need to be rewritten,
// so we need to unmarshall them
//----------------------------------------------------------------------------
Status XRootDTransport::UnMarshallRequest( Message *msg )
{
// We rely on the marshaling process to be symmetric!
// First we unmarshall the request ID and the length because
// MarshallRequest() relies on these, and then we need to unmarshall these
// two again, because they get marshalled in MarshallRequest().
// All this is pretty damn ugly and should be rewritten.
ClientRequest *req = (ClientRequest*)msg->GetBuffer();
req->header.requestid = htons( req->header.requestid );
req->header.dlen = htonl( req->header.dlen );
Status st = MarshallRequest( msg );
req->header.requestid = htons( req->header.requestid );
req->header.dlen = htonl( req->header.dlen );
msg->SetIsMarshalled( false );
return st;
}
//----------------------------------------------------------------------------
// Unmarshall the body of the incoming message
//----------------------------------------------------------------------------
Status XRootDTransport::UnMarshallBody( Message *msg, uint16_t reqType )
{
ServerResponse *m = (ServerResponse *)msg->GetBuffer();
//--------------------------------------------------------------------------
// kXR_ok
//--------------------------------------------------------------------------
if( m->hdr.status == kXR_ok )
{
switch( reqType )
{
//----------------------------------------------------------------------
// kXR_protocol
//----------------------------------------------------------------------
case kXR_protocol:
if( m->hdr.dlen < 8 )
return Status( stError, errInvalidMessage );
m->body.protocol.pval = ntohl( m->body.protocol.pval );
m->body.protocol.flags = ntohl( m->body.protocol.flags );
break;
}
}
//--------------------------------------------------------------------------
// kXR_error
//--------------------------------------------------------------------------
else if( m->hdr.status == kXR_error )
{
if( m->hdr.dlen < 4 )
return Status( stError, errInvalidMessage );
m->body.error.errnum = ntohl( m->body.error.errnum );
}
//--------------------------------------------------------------------------
// kXR_wait
//--------------------------------------------------------------------------
else if( m->hdr.status == kXR_wait )
{
if( m->hdr.dlen < 4 )
return Status( stError, errInvalidMessage );
m->body.wait.seconds = htonl( m->body.wait.seconds );
}
//--------------------------------------------------------------------------
// kXR_redirect
//--------------------------------------------------------------------------
else if( m->hdr.status == kXR_redirect )
{
if( m->hdr.dlen < 4 )
return Status( stError, errInvalidMessage );
m->body.redirect.port = htonl( m->body.redirect.port );
}
//--------------------------------------------------------------------------
// kXR_waitresp
//--------------------------------------------------------------------------
else if( m->hdr.status == kXR_waitresp )
{
if( m->hdr.dlen < 4 )
return Status( stError, errInvalidMessage );
m->body.waitresp.seconds = htonl( m->body.waitresp.seconds );
}
//--------------------------------------------------------------------------
// kXR_attn
//--------------------------------------------------------------------------
else if( m->hdr.status == kXR_attn )
{
if( m->hdr.dlen < 4 )
return Status( stError, errInvalidMessage );
m->body.attn.actnum = htonl( m->body.attn.actnum );
}
return Status();
}
//------------------------------------------------------------------------
// Unmarshall the header of the incoming message
//------------------------------------------------------------------------
void XRootDTransport::UnMarshallHeader( Message *msg )
{
ServerResponseHeader *header = (ServerResponseHeader *)msg->GetBuffer();
header->status = ntohs( header->status );
header->dlen = ntohl( header->dlen );
}
//----------------------------------------------------------------------------
// Log server error response
//----------------------------------------------------------------------------
void XRootDTransport::LogErrorResponse( const Message &msg )
{
Log *log = DefaultEnv::GetLog();
ServerResponse *rsp = (ServerResponse *)msg.GetBuffer();
char *errmsg = new char[rsp->hdr.dlen-3]; errmsg[rsp->hdr.dlen-4] = 0;
memcpy( errmsg, rsp->body.error.errmsg, rsp->hdr.dlen-4 );
log->Error( XRootDTransportMsg, "Server responded with an error [%d]: %s",
rsp->body.error.errnum, errmsg );
delete [] errmsg;
}
//----------------------------------------------------------------------------