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XrdXrootdXeq.cc
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XrdXrootdXeq.cc
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/******************************************************************************/
/* */
/* X r d X r o o t d X e q . c c */
/* */
/* (c) 2004 by the Board of Trustees of the Leland Stanford, Jr., University */
/* Produced by Andrew Hanushevsky for Stanford University under contract */
/* DE-AC02-76-SFO0515 with the Department of Energy */
/* */
/* 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 Lesser General Public */
/* License for more details. */
/* */
/* You should have received a copy of the GNU Lesser General Public License */
/* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */
/* COPYING (GPL license). If not, see <http://www.gnu.org/licenses/>. */
/* */
/* The copyright holder's institutional names and contributor's names may not */
/* be used to endorse or promote products derived from this software without */
/* specific prior written permission of the institution or contributor. */
/******************************************************************************/
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <sys/time.h>
#include "XrdSfs/XrdSfsInterface.hh"
#include "XrdSys/XrdSysError.hh"
#include "XrdSys/XrdSysPlatform.hh"
#include "XrdSys/XrdSysTimer.hh"
#include "XrdOuc/XrdOucEnv.hh"
#include "XrdOuc/XrdOucReqID.hh"
#include "XrdOuc/XrdOucTList.hh"
#include "XrdOuc/XrdOucStream.hh"
#include "XrdOuc/XrdOucTokenizer.hh"
#include "XrdOuc/XrdOucUtils.hh"
#include "XrdSec/XrdSecInterface.hh"
#include "XrdSec/XrdSecProtector.hh"
#include "Xrd/XrdBuffer.hh"
#include "Xrd/XrdInet.hh"
#include "Xrd/XrdLink.hh"
#include "XrdXrootd/XrdXrootdAio.hh"
#include "XrdXrootd/XrdXrootdCallBack.hh"
#include "XrdXrootd/XrdXrootdFile.hh"
#include "XrdXrootd/XrdXrootdFileLock.hh"
#include "XrdXrootd/XrdXrootdJob.hh"
#include "XrdXrootd/XrdXrootdMonFile.hh"
#include "XrdXrootd/XrdXrootdMonitor.hh"
#include "XrdXrootd/XrdXrootdPio.hh"
#include "XrdXrootd/XrdXrootdPrepare.hh"
#include "XrdXrootd/XrdXrootdProtocol.hh"
#include "XrdXrootd/XrdXrootdStats.hh"
#include "XrdXrootd/XrdXrootdTrace.hh"
#include "XrdXrootd/XrdXrootdXeq.hh"
#include "XrdXrootd/XrdXrootdXPath.hh"
#include "XrdVersion.hh"
/******************************************************************************/
/* G l o b a l s */
/******************************************************************************/
extern XrdOucTrace *XrdXrootdTrace;
/******************************************************************************/
/* L o c a l S t r u c t u r e s */
/******************************************************************************/
struct XrdXrootdSessID
{unsigned int Sid;
int Pid;
int FD;
unsigned int Inst;
XrdXrootdSessID() {}
~XrdXrootdSessID() {}
};
struct XrdXrootdWVInfo
{XrdOucIOVec *wrVec; // Prevents compiler array bounds complaint
int curFH;
short vBeg;
short vPos;
short vEnd;
short vMon;
bool doSync;
char wvMon;
bool ioMon;
char vType;
XrdOucIOVec ioVec[1]; // Dynamically sized
};
/******************************************************************************/
/* L o c a l D e f i n e s */
/******************************************************************************/
namespace
{
static const int op_isOpen = 0x00010000;
static const int op_isRead = 0x00020000;
const char *getTime()
{
static char buff[16];
char tuff[8];
struct timeval tv;
struct tm *tmp;
if (gettimeofday(&tv, 0))
{perror("gettimeofday");
exit(255);
}
tmp = localtime(&tv.tv_sec);
if (!tmp)
{perror("localtime");
exit(255);
}
//012345678901234
if (strftime(buff, sizeof(buff), "%y%m%d:%H%M%S. ", tmp) <= 0)
{errno = EINVAL;
perror("strftime");
exit(255);
}
snprintf(tuff, sizeof(tuff), "%d", static_cast<int>(tv.tv_usec/100000));
buff[14] = tuff[0];
return buff;
}
// Startup time
// 012345670123456
// yymmdd:hhmmss.t
static const char *startUP = getTime();
}
/******************************************************************************/
/* d o _ A d m i n */
/******************************************************************************/
int XrdXrootdProtocol::do_Admin()
{
return Response.Send(kXR_Unsupported, "admin request is not supported");
}
/******************************************************************************/
/* d o _ A u t h */
/******************************************************************************/
int XrdXrootdProtocol::do_Auth()
{
XrdSecCredentials cred;
XrdSecParameters *parm = 0;
XrdOucErrInfo eMsg;
const char *eText;
int rc, n;
// Ignore authenticate requests if security turned off
//
if (!CIA) return Response.Send();
cred.size = Request.header.dlen;
cred.buffer = argp->buff;
// If we have no auth protocol or the current protocol is being changed by the
// client (the client can do so at any time), try to get it. Track number of
// times we got a protocol object as the read count (we will zero it out later).
// The credtype change check is always done. While the credtype is consistent,
// not all protocols provided this information in the past. So, old clients will
// not necessarily be able to switch protocols mid-stream.
//
if (!AuthProt
|| strncmp(Entity.prot, (const char *)Request.auth.credtype,
sizeof(Request.auth.credtype)))
{if (AuthProt) AuthProt->Delete();
size_t size = sizeof(Request.auth.credtype);
strncpy(Entity.prot, (const char *)Request.auth.credtype, size);
if (!(AuthProt = CIA->getProtocol(Link->Host(), *(Link->AddrInfo()),
&cred, &eMsg)))
{eText = eMsg.getErrText(rc);
eDest.Emsg("Xeq", "User authentication failed;", eText);
return Response.Send(kXR_NotAuthorized, eText);
}
AuthProt->Entity.tident = Link->ID;
numReads++;
}
// Now try to authenticate the client using the current protocol
//
if (!(rc = AuthProt->Authenticate(&cred, &parm, &eMsg)))
{rc = Response.Send(); Status &= ~XRD_NEED_AUTH; SI->Bump(SI->LoginAU);
Client = &AuthProt->Entity; numReads = 0; strcpy(Entity.prot, "host");
if (DHS) Protect = DHS->New4Server(*AuthProt,clientPV&XrdOucEI::uVMask);
if (Monitor.Logins() && Monitor.Auths()) MonAuth();
if (!logLogin(true)) return -1;
return rc;
}
// If we need to continue authentication, tell the client as much
//
if (rc > 0)
{TRACEP(LOGIN, "more auth requested; sz=" <<(parm ? parm->size : 0));
if (parm) {rc = Response.Send(kXR_authmore, parm->buffer, parm->size);
delete parm;
return rc;
}
eDest.Emsg("Xeq", "Security requested additional auth w/o parms!");
return Response.Send(kXR_ServerError,"invalid authentication exchange");
}
// Authentication failed. We will delete the authentication object and zero
// out the pointer. We can do this without any locks because this section is
// single threaded relative to a connection. To prevent guessing attacks, we
// wait a variable amount of time if there have been 3 or more tries.
//
if (AuthProt) {AuthProt->Delete(); AuthProt = 0;}
if ((n = numReads - 2) > 0) XrdSysTimer::Snooze(n > 5 ? 5 : n);
// We got an error, bail out.
//
SI->Bump(SI->AuthBad);
eText = eMsg.getErrText(rc);
eDest.Emsg("Xeq", "User authentication failed;", eText);
return Response.Send(kXR_NotAuthorized, eText);
}
/******************************************************************************/
/* d o _ B i n d */
/******************************************************************************/
int XrdXrootdProtocol::do_Bind()
{
XrdXrootdSessID *sp = (XrdXrootdSessID *)Request.bind.sessid;
XrdXrootdProtocol *pp;
XrdLink *lp;
int i, pPid, rc;
char buff[64], *cp, *dp;
// Update misc stats count
//
SI->Bump(SI->miscCnt);
// Check if binds need to occur on a TLS connection.
//
if ((doTLS & Req_TLSData) && !Link->hasTLS() && !Link->hasBridge())
return Response.Send(kXR_TLSRequired, "bind requires TLS");
// Find the link we are to bind to
//
if (sp->FD <= 0 || !(lp = XrdLink::fd2link(sp->FD, sp->Inst)))
return Response.Send(kXR_NotFound, "session not found");
// The link may have escaped so we need to hold this link and try again
//
lp->Hold(1);
if (lp != XrdLink::fd2link(sp->FD, sp->Inst))
{lp->Hold(0);
return Response.Send(kXR_NotFound, "session just closed");
}
// Get the protocol associated with the link
//
if (!(pp=dynamic_cast<XrdXrootdProtocol *>(lp->getProtocol()))||lp != pp->Link)
{lp->Hold(0);
return Response.Send(kXR_ArgInvalid, "session protocol not xroot");
}
// Verify that the parent protocol is fully logged in
//
if (!(pp->Status & XRD_LOGGEDIN) || (pp->Status & XRD_NEED_AUTH))
{lp->Hold(0);
return Response.Send(kXR_ArgInvalid, "session not logged in");
}
// Verify that the bind is valid for the requestor
//
if (sp->Pid != myPID || sp->Sid != pp->mySID)
{lp->Hold(0);
return Response.Send(kXR_ArgInvalid, "invalid session ID");
}
// For now, verify that the request is comming from the same host
//
if (strcmp(Link->Host(), lp->Host()))
{lp->Hold(0);
return Response.Send(kXR_NotAuthorized, "cross-host bind not allowed");
}
// Find a slot for this path in parent protocol
//
for (i = 1; i < maxStreams && pp->Stream[i]; i++) {}
if (i >= maxStreams)
{lp->Hold(0);
return Response.Send(kXR_NoMemory, "bind limit exceeded");
}
// Link this protocol to the parent
//
pp->Stream[i] = this;
Stream[0] = pp;
pp->isBound = 1;
PathID = i;
sprintf(buff, "FD %d#%d bound", Link->FDnum(), i);
eDest.Log(SYS_LOG_01, "Xeq", buff, lp->ID);
// Construct a login name for this bind session
//
cp = strdup(lp->ID);
if ( (dp = rindex(cp, '@'))) *dp = '\0';
if (!(dp = rindex(cp, '.'))) pPid = 0;
else {*dp++ = '\0'; pPid = strtol(dp, (char **)NULL, 10);}
Link->setID(cp, pPid);
free(cp);
CapVer = pp->CapVer;
Status = XRD_BOUNDPATH;
clientPV = pp->clientPV;
// Get the required number of parallel I/O objects
//
pioFree = XrdXrootdPio::Alloc(maxPio);
// There are no errors possible at this point unless the response fails
//
buff[0] = static_cast<char>(i);
if (!(rc = Response.Send(kXR_ok, buff, 1))) rc = -EINPROGRESS;
// Return but keep the link disabled
//
lp->Hold(0);
return rc;
}
/******************************************************************************/
/* d o _ c h m o d */
/******************************************************************************/
int XrdXrootdProtocol::do_Chmod()
{
int mode, rc;
char *opaque;
XrdOucErrInfo myError(Link->ID, Monitor.Did, clientPV);
// Check for static routing
//
STATIC_REDIRECT(RD_chmod);
// Unmarshall the data
//
mode = mapMode((int)ntohs(Request.chmod.mode));
if (rpCheck(argp->buff, &opaque)) return rpEmsg("Modifying", argp->buff);
if (!Squash(argp->buff)) return vpEmsg("Modifying", argp->buff);
// Preform the actual function
//
rc = osFS->chmod(argp->buff, (XrdSfsMode)mode, myError, CRED, opaque);
TRACEP(FS, "chmod rc=" <<rc <<" mode=" <<std::oct <<mode <<std::dec <<' ' <<argp->buff);
if (SFS_OK == rc) return Response.Send();
// An error occured
//
return fsError(rc, XROOTD_MON_CHMOD, myError, argp->buff, opaque);
}
/******************************************************************************/
/* d o _ C K s u m */
/******************************************************************************/
int XrdXrootdProtocol::do_CKsum(int canit)
{
char *opaque;
char *algT = JobCKT, *args[5];
int rc;
// Check for static routing
//
STATIC_REDIRECT(RD_chksum);
// Check if we support this operation
//
if (!JobCKT || (!JobLCL && !JobCKS))
return Response.Send(kXR_Unsupported, "query chksum is not supported");
// Prescreen the path
//
if (rpCheck(argp->buff, &opaque)) return rpEmsg("Check summing", argp->buff);
if (!Squash(argp->buff)) return vpEmsg("Check summing", argp->buff);
// If this is a cancel request, do it now
//
if (canit)
{if (JobCKS) JobCKS->Cancel(argp->buff, &Response);
return Response.Send();
}
// Check if multiple checksums are supported and if so, pre-process
//
if (JobCKCGI && opaque && *opaque)
{XrdOucEnv jobEnv(opaque);
char *cksT;
if ((cksT = jobEnv.Get("cks.type")))
{XrdOucTList *tP = JobCKTLST;
while(tP && strcasecmp(tP->text, cksT)) tP = tP->next;
if (!tP)
{char ebuf[1024];
snprintf(ebuf, sizeof(ebuf), "%s checksum not supported.", cksT);
return Response.Send(kXR_ServerError, ebuf);
}
algT = tP->text;
}
}
// If we are allowed to locally query the checksum to avoid computation, do it
//
if (JobLCL && (rc = do_CKsum(algT, argp->buff, opaque)) <= 0) return rc;
// Just make absolutely sure we can continue with a calculation
//
if (!JobCKS)
return Response.Send(kXR_ServerError, "Logic error computing checksum.");
// Check if multiple checksums are supported and construct right argument list
//
if (JobCKCGI > 1 || JobLCL)
{args[0] = algT;
args[1] = algT;
args[2] = argp->buff;
args[3] = const_cast<char *>(Client->tident);
args[4] = 0;
} else {
args[0] = algT;
args[1] = argp->buff;
args[2] = 0;
}
// Preform the actual function
//
return JobCKS->Schedule(argp->buff, (const char **)args, &Response,
((CapVer & kXR_vermask) >= kXR_ver002 ? 0 : JOB_Sync));
}
/******************************************************************************/
int XrdXrootdProtocol::do_CKsum(char *algT, const char *Path, char *Opaque)
{
static char Space = ' ';
XrdOucErrInfo myError(Link->ID, Monitor.Did, clientPV);
int CKTLen = strlen(algT);
int ec, rc = osFS->chksum(XrdSfsFileSystem::csGet, algT, Path,
myError, CRED, Opaque);
const char *csData = myError.getErrText(ec);
// Diagnose any hard errors
//
if (rc) return fsError(rc, 0, myError, Path, Opaque);
// Return result if it is actually available
//
if (*csData)
{if (*csData == '!') return Response.Send(csData+1);
struct iovec iov[4] = {{0,0}, {algT, (size_t)CKTLen}, {&Space, 1},
{(char *)csData, strlen(csData)+1}};
return Response.Send(iov, 4);
}
// Diagnose soft errors
//
if (!JobCKS)
{const char *eTxt[2] = {JobCKT, " checksum not available."};
myError.setErrInfo(0, eTxt, 2);
return Response.Send(kXR_ChkSumErr, myError.getErrText());
}
// Return indicating that we should try calculating the checksum
//
return 1;
}
/******************************************************************************/
/* d o _ C l o s e */
/******************************************************************************/
int XrdXrootdProtocol::do_Close()
{
static XrdXrootdCallBack closeCB("close", XROOTD_MON_CLOSE);
XrdXrootdFile *fp;
XrdXrootdFHandle fh(Request.close.fhandle);
int rc;
bool doDel = true;
// Keep statistics
//
SI->Bump(SI->miscCnt);
// Find the file object
//
if (!FTab || !(fp = FTab->Get(fh.handle)))
return Response.Send(kXR_FileNotOpen,
"close does not refer to an open file");
// Serialize the link to make sure that any in-flight operations on this handle
// have completed (async mode or parallel streams)
//
Link->Serialize();
// Setup the callback to allow close() to return SFS_STARTED so we can defer
// the response to the close request as it may be a lengthy operation. In
// this case the argument is the actual file pointer and the link reference
// is recorded in the file object.
//
fp->cbArg = ReqID.getID();
fp->XrdSfsp->error.setErrCB(&closeCB, (unsigned long long)fp);
// Do an explicit close of the file here; check for exceptions. Stall requests
// leave the file open as there will be a retry. Otherwise, we remove the
// file from our open table but a "started" return defers the the delete.
//
rc = fp->XrdSfsp->close();
TRACEP(FS, "close rc=" <<rc <<" fh=" <<fh.handle);
if (rc >= SFS_STALL) return fsError(rc, 0, fp->XrdSfsp->error, 0, 0);
if (rc == SFS_STARTED) doDel = false;
// Before we potentially delete the file handle in FTab->Del, generate the
// appropriate error code (if necessary). Note that we delay the call
// to Response.Send() in the successful case to avoid holding on to the lock
// while the response is sent.
int retval = 0;
if (SFS_OK != rc) retval = fsError(rc, 0, fp->XrdSfsp->error, 0, 0);
// Delete the file from the file table. If the file object is deleted then it
// will unlock the file In all cases, final monitoring records will be produced.
//
FTab->Del((Monitor.Files() ? Monitor.Agent : 0), fh.handle, doDel);
numFiles--;
// Send back the right response
//
if (SFS_OK == rc) return Response.Send();
return retval;
}
/******************************************************************************/
/* d o _ D i r l i s t */
/******************************************************************************/
int XrdXrootdProtocol::do_Dirlist()
{
int bleft, rc = 0, dlen, cnt = 0;
char *opaque, *buff, ebuff[4096];
const char *dname;
XrdSfsDirectory *dp;
bool doDig;
// Check if we are digging for data
//
doDig = (digFS && SFS_LCLROOT(argp->buff));
// Check for static routing
//
if (!doDig) {STATIC_REDIRECT(RD_dirlist);}
// Prescreen the path
//
if (rpCheck(argp->buff, &opaque)) return rpEmsg("Listing", argp->buff);
if (!doDig && !Squash(argp->buff))return vpEmsg("Listing", argp->buff);
// Get a directory object
//
if (doDig) dp = digFS->newDir(Link->ID, Monitor.Did);
else dp = osFS->newDir(Link->ID, Monitor.Did);
// Make sure we have the object
//
if (!dp)
{snprintf(ebuff,sizeof(ebuff)-1,"Insufficient memory to open %s",argp->buff);
eDest.Emsg("Xeq", ebuff);
return Response.Send(kXR_NoMemory, ebuff);
}
// First open the directory
//
dp->error.setUCap(clientPV);
if ((rc = dp->open(argp->buff, CRED, opaque)))
{rc = fsError(rc, XROOTD_MON_OPENDIR, dp->error, argp->buff, opaque);
delete dp;
return rc;
}
// Check if the caller wants stat information as well
//
if (Request.dirlist.options[0] & kXR_dstat)
return do_DirStat(dp, ebuff, opaque);
// Start retreiving each entry and place in a local buffer with a trailing new
// line character (the last entry will have a null byte). If we cannot fit a
// full entry in the buffer, send what we have with an OKSOFAR and continue.
// This code depends on the fact that a directory entry will never be longer
// than sizeof( ebuff)-1; otherwise, an infinite loop will result. No errors
// are allowed to be reflected at this point.
//
dname = 0;
do {buff = ebuff; bleft = sizeof(ebuff);
while(dname || (dname = dp->nextEntry()))
{dlen = strlen(dname);
if (dlen > 2 || dname[0] != '.' || (dlen == 2 && dname[1] != '.'))
{if ((bleft -= (dlen+1)) < 0) break;
strcpy(buff, dname); buff += dlen; *buff = '\n'; buff++; cnt++;
}
dname = 0;
}
if (dname) rc = Response.Send(kXR_oksofar, ebuff, buff-ebuff);
} while(!rc && dname);
// Send the ending packet if we actually have one to send
//
if (!rc)
{if (ebuff == buff) rc = Response.Send();
else {*(buff-1) = '\0';
rc = Response.Send((void *)ebuff, buff-ebuff);
}
}
// Close the directory
//
dp->close();
delete dp;
if (!rc) {TRACEP(FS, "dirlist entries=" <<cnt <<" path=" <<argp->buff);}
return rc;
}
/******************************************************************************/
/* d o _ D i r S t a t */
/******************************************************************************/
int XrdXrootdProtocol::do_DirStat(XrdSfsDirectory *dp, char *pbuff,
char *opaque)
{
XrdOucErrInfo myError(Link->ID, Monitor.Did, clientPV);
struct stat Stat;
static const int statSz = 80;
int bleft, rc = 0, dlen, cnt = 0;
char *buff, *dLoc;
const char *dname;
struct {char ebuff[8192]; char epad[512];} XB;
// Construct the path to the directory as we will be asking for stat calls
// if the interface does not support autostat.
//
if (dp->autoStat(&Stat) == SFS_OK) dLoc = 0;
else {strcpy(pbuff, argp->buff);
dlen = strlen(pbuff);
if (pbuff[dlen-1] != '/') {pbuff[dlen] = '/'; dlen++;}
dLoc = pbuff+dlen;
}
// The initial leadin is a "dot" entry to indicate to the client that we
// support the dstat option (older servers will not do that). It's up to the
// client to issue individual stat requests in that case.
//
memset(&Stat, 0, sizeof(Stat));
strcpy(XB.ebuff, ".\n0 0 0 0\n");
buff = XB.ebuff+10; bleft = sizeof(XB.ebuff)-10;
// Start retreiving each entry and place in a local buffer with a trailing new
// line character (the last entry will have a null byte). If we cannot fit a
// full entry in the buffer, send what we have with an OKSOFAR and continue.
// This code depends on the fact that a directory entry will never be longer
// than sizeof( ebuff)-1; otherwise, an infinite loop will result. No errors
// are allowed to be reflected at this point.
//
dname = 0;
do {while(dname || (dname = dp->nextEntry()))
{dlen = strlen(dname);
if (dlen > 2 || dname[0] != '.' || (dlen == 2 && dname[1] != '.'))
{if ((bleft -= (dlen+1)) < 0 || bleft < statSz) break;
strcpy(buff, dname); buff += dlen; *buff = '\n'; buff++; cnt++;
if (dLoc)
{strcpy(dLoc, dname);
rc = osFS->stat(pbuff, &Stat, myError, CRED, opaque);
if (rc != SFS_OK)
return fsError(rc, XROOTD_MON_STAT, myError,
argp->buff, opaque);
}
dlen = StatGen(Stat, buff, sizeof(XB.epad));
bleft -= dlen; buff += (dlen-1); *buff = '\n'; buff++;
}
dname = 0;
}
if (dname)
{rc = Response.Send(kXR_oksofar, XB.ebuff, buff-XB.ebuff);
buff = XB.ebuff; bleft = sizeof(XB.ebuff);
}
} while(!rc && dname);
// Send the ending packet if we actually have one to send
//
if (!rc)
{if (XB.ebuff == buff) rc = Response.Send();
else {*(buff-1) = '\0';
rc = Response.Send((void *)XB.ebuff, buff-XB.ebuff);
}
}
// Close the directory
//
dp->close();
delete dp;
if (!rc) {TRACEP(FS, "dirstat entries=" <<cnt <<" path=" <<argp->buff);}
return rc;
}
/******************************************************************************/
/* d o _ E n d s e s s */
/******************************************************************************/
int XrdXrootdProtocol::do_Endsess()
{
XrdXrootdSessID *sp, sessID;
int rc;
// Update misc stats count
//
SI->Bump(SI->miscCnt);
// Extract out the FD and Instance from the session ID
//
sp = (XrdXrootdSessID *)Request.endsess.sessid;
memcpy((void *)&sessID.Pid, &sp->Pid, sizeof(sessID.Pid));
memcpy((void *)&sessID.FD, &sp->FD, sizeof(sessID.FD));
memcpy((void *)&sessID.Inst, &sp->Inst, sizeof(sessID.Inst));
// Trace this request
//
TRACEP(LOGIN, "endsess " <<sessID.Pid <<':' <<sessID.FD <<'.' <<sessID.Inst);
// If this session id does not refer to us, ignore the request
//
if (sessID.Pid != myPID) return Response.Send();
// Terminate the indicated session, if possible. This could also be a self-termination.
//
if ((sessID.FD == 0 && sessID.Inst == 0)
|| !(rc = Link->Terminate(0, sessID.FD, sessID.Inst))) return -1;
// Trace this request
//
TRACEP(LOGIN, "endsess " <<sessID.Pid <<':' <<sessID.FD <<'.' <<sessID.Inst
<<" rc=" <<rc <<" (" <<strerror(rc < 0 ? -rc : EAGAIN) <<")");
// Return result. We only return obvious problems (exclude ESRCH and EPIPE).
//
if (rc > 0)
return (rc = Response.Send(kXR_wait, rc, "session still active")) ? rc:1;
if (rc == -EACCES)return Response.Send(kXR_NotAuthorized, "not session owner");
if (rc == -ETIME) return Response.Send(kXR_Cancelled,"session not ended");
return Response.Send();
}
/******************************************************************************/
/* d o _ F A t t r */
/* */
/* Resides in XrdXrootdXeqFAttr.cc */
/******************************************************************************/
/******************************************************************************/
/* d o G e t f i l e */
/******************************************************************************/
int XrdXrootdProtocol::do_Getfile()
{
// int gopts, buffsz;
// Keep Statistics
//
SI->Bump(SI->getfCnt);
// Check if getfiles need to occur on a TLS connection
//
if ((doTLS & Req_TLSTPC) && !Link->hasTLS() && !Link->hasBridge())
return Response.Send(kXR_TLSRequired, "getfile requires TLS");
return Response.Send(kXR_Unsupported, "getfile request is not supported");
}
/******************************************************************************/
/* d o _ L o c a t e */
/******************************************************************************/
int XrdXrootdProtocol::do_Locate()
{
static XrdXrootdCallBack locCB("locate", XROOTD_MON_LOCATE);
int rc, opts, fsctl_cmd = SFS_FSCTL_LOCATE;
char *opaque = 0, *Path, *fn = argp->buff, opt[8], *op=opt;
XrdOucErrInfo myError(Link->ID,&locCB,ReqID.getID(),Monitor.Did,clientPV);
bool doDig = false;
// Unmarshall the data
//
opts = (int)ntohs(Request.locate.options);
// Map the options
//
if (opts & kXR_nowait) {fsctl_cmd |= SFS_O_NOWAIT; *op++ = 'i';}
if (opts & kXR_refresh) {fsctl_cmd |= SFS_O_RESET; *op++ = 's';}
if (opts & kXR_force ) {fsctl_cmd |= SFS_O_FORCE; *op++ = 'f';}
if (opts & kXR_prefname){fsctl_cmd |= SFS_O_HNAME; *op++ = 'n';}
if (opts & kXR_compress){fsctl_cmd |= SFS_O_RAWIO; *op++ = 'u';}
*op = '\0';
TRACEP(FS, "locate " <<opt <<' ' <<fn);
// Check if this is a non-specific locate
//
if (*fn != '*'){Path = fn;
doDig = (digFS && SFS_LCLROOT(Path));
}
else if (*(fn+1)) {Path = fn+1;
doDig = (digFS && SFS_LCLROOT(Path));
}
else {Path = 0;
fn = XPList.Next()->Path();
fsctl_cmd |= SFS_O_TRUNC;
}
// Check for static routing
//
if (!doDig) {STATIC_REDIRECT(RD_locate);}
// Prescreen the path
//
if (Path)
{if (rpCheck(Path, &opaque)) return rpEmsg("Locating", Path);
if (!doDig && !Squash(Path))return vpEmsg("Locating", Path);
}
// Preform the actual function
//
if (doDig) rc = digFS->fsctl(fsctl_cmd, fn, myError, CRED);
else rc = osFS->fsctl(fsctl_cmd, fn, myError, CRED);
TRACEP(FS, "rc=" <<rc <<" locate " <<fn);
return fsError(rc, (doDig ? 0 : XROOTD_MON_LOCATE), myError, Path, opaque);
}
/******************************************************************************/
/* d o _ L o g i n */
/*.x***************************************************************************/
int XrdXrootdProtocol::do_Login()
{
static XrdSysMutex sessMutex;
static unsigned int Sid = 0;
XrdXrootdSessID sessID;
XrdNetAddrInfo *addrP;
int i, pid, rc, sendSID = 0;
char uname[sizeof(Request.login.username)+1];
// Keep Statistics
//
SI->Bump(SI->LoginAT);
// Check if login need to occur on a TLS connection
//
if ((doTLS & Req_TLSLogin) && !Link->hasTLS() && !Link->hasBridge())
return Response.Send(kXR_TLSRequired, "login requires TLS");
// Unmarshall the data
//
pid = (int)ntohl(Request.login.pid);
for (i = 0; i < (int)sizeof(Request.login.username); i++)
{if (Request.login.username[i] == '\0' ||
Request.login.username[i] == ' ') break;
uname[i] = Request.login.username[i];
if (!isprint(uname[i])) uname[i] = '_';
}
uname[i] = '\0';
// Make sure the user is not already logged in
//
if (Status) return Response.Send(kXR_InvalidRequest,
"duplicate login; already logged in");
// Establish the ID for this link
//
Link->setID(uname, pid);
CapVer = Request.login.capver[0];
// Establish the session ID if the client can handle it (protocol version > 0)
//
if ((i = (CapVer & kXR_vermask)))
{sessID.FD = Link->FDnum();
sessID.Inst = Link->Inst();
sessID.Pid = myPID;
sessMutex.Lock(); mySID = ++Sid; sessMutex.UnLock();
sessID.Sid = mySID;
sendSID = 1;
if (!clientPV)
{ if (i >= kXR_ver004) clientPV = (int)0x0310;
else if (i == kXR_ver003) clientPV = (int)0x0300;
else if (i == kXR_ver002) clientPV = (int)0x0290;
else if (i == kXR_ver001) clientPV = (int)0x0200;
else clientPV = (int)0x0100;
}
if (CapVer & kXR_asyncap) clientPV |= XrdOucEI::uAsync;
if (Request.login.ability & kXR_fullurl)
clientPV |= XrdOucEI::uUrlOK;
if (Request.login.ability & kXR_multipr)
clientPV |= (XrdOucEI::uMProt | XrdOucEI::uUrlOK);
if (Request.login.ability & kXR_readrdok)
clientPV |= XrdOucEI::uReadR;
if (Request.login.ability & kXR_hasipv64)
clientPV |= XrdOucEI::uIPv64;
}
// Mark the client as IPv4 if they came in as IPv4 or mapped IPv4 we can only
// return IPv4 addresses. Of course, if the client is dual-stacked then we
// simply indicate the client can accept either (the client better be honest).
//
addrP = Link->AddrInfo();
if (addrP->isIPType(XrdNetAddrInfo::IPv4) || addrP->isMapped())
clientPV |= XrdOucEI::uIPv4;
// WORKAROUND: XrdCl 4.0.x often identifies worker nodes as being IPv6-only.
// Rather than breaking a significant number of our dual-stack workers, we
// automatically denote IPv6 connections as also supporting IPv4 - regardless
// of what the remote client claims. This was fixed in 4.3.x but we can't
// tell release differences until 4.5 when we can safely ignore this as we
// also don't want to misidentify IPv6-only clients either.
else if (i < kXR_ver004 && XrdInet::GetAssumeV4())
clientPV |= XrdOucEI::uIPv64;
// Mark the client as being on a private net if the address is private
//
if (addrP->isPrivate()) {clientPV |= XrdOucEI::uPrip; rdType = 1;}
else rdType = 0;
// Check if this is an admin login
//
if (*(Request.login.role) & (kXR_char)kXR_useradmin)
Status = XRD_ADMINUSER;
// Get the security token for this link. We will either get a token, a null
// string indicating host-only authentication, or a null indicating no
// authentication. We can then optimize of each case.
//
if (CIA)
{const char *pp=CIA->getParms(i, Link->AddrInfo());
if (pp && i ) {if (!sendSID) rc = Response.Send((void *)pp, i);
else {struct iovec iov[3];
iov[1].iov_base = (char *)&sessID;
iov[1].iov_len = sizeof(sessID);
iov[2].iov_base = (char *)pp;
iov[2].iov_len = i;
rc = Response.Send(iov,3,int(i+sizeof(sessID)));
}
Status = (XRD_LOGGEDIN | XRD_NEED_AUTH);
}
else {rc = (sendSID ? Response.Send((void *)&sessID, sizeof(sessID))
: Response.Send());
Status = XRD_LOGGEDIN; SI->Bump(SI->LoginUA);
}
}
else {rc = (sendSID ? Response.Send((void *)&sessID, sizeof(sessID))
: Response.Send());
Status = XRD_LOGGEDIN; SI->Bump(SI->LoginUA);
}
// We always allow at least host-based authentication. This may be over-ridden
// should strong authentication be enabled. Allocation of the protocol object
// already supplied the protocol name and the host name. We supply the tident
// and the connection details in addrInfo.
//
Entity.tident = Link->ID;
Entity.addrInfo = Link->AddrInfo();
Client = &Entity;
// Check if we need to process a login environment
//
if (Request.login.dlen > 8)
{XrdOucEnv loginEnv(argp->buff+1, Request.login.dlen-1);
char *cCode = loginEnv.Get("xrd.cc");
char *tzVal = loginEnv.Get("xrd.tz");
char *appXQ = loginEnv.Get("xrd.appname");
char *aInfo = loginEnv.Get("xrd.info");
int tzNum = (tzVal ? atoi(tzVal) : 0);
if (cCode && *cCode && tzNum >= -12 && tzNum <= 14)
{XrdNetAddrInfo::LocInfo locInfo;
locInfo.Country[0] = cCode[0]; locInfo.Country[1] = cCode[1];
locInfo.TimeZone = tzNum & 0xff;
Link->setLocation(locInfo);
}
if (Monitor.Ready() && (appXQ || aInfo))
{char apBuff[1024];
snprintf(apBuff, sizeof(apBuff), "&x=%s&y=%s&I=%c",
(appXQ ? appXQ : ""), (aInfo ? aInfo : ""),
(clientPV & XrdOucEI::uIPv4 ? '4' : '6'));