XrdOucReqID Class Reference

#include <XrdOucReqID.hh>

Collaboration diagram for XrdOucReqID:

Public Member Functions
	XrdOucReqID ()
	XrdOucReqID (const XrdNetSockAddr *myAddr, int myPort=-1)
	~XrdOucReqID ()
char *	ID (char *buff, int blen)
char *	isMine (char *reqid, int &hport, char *hname, int hlen)
char *	PFX ()

Static Public Member Functions
static int	Index (int KeyMax, const char *KeyVal, int KeyLen=0)

Detailed Description

Definition at line 41 of file XrdOucReqID.hh.

Constructor & Destructor Documentation

XrdOucReqID() [1/2]

XrdOucReqID::XrdOucReqID

(

)

Definition at line 53 of file XrdOucReqID.cc.

{
   char xbuff[256];
   int eNow = static_cast<int>(time(0)), myPid = static_cast<int>(getpid());
 
// Now format the formatting template
//
   snprintf(xbuff, sizeof(xbuff)-1, "%08X:%08x.%%d", myPid, eNow);
   reqFMT    = strdup(xbuff);
   xbuff[8]  = 0;
   reqPFX    = strdup(xbuff);
   reqPFXlen = 8;
   reqIntern = 0;
   reqNum    = 0;
}

XrdOucReqID() [2/2]

XrdOucReqID::XrdOucReqID	(	const XrdNetSockAddr *	myAddr,
		int	myPort = -1
	)

Definition at line 71 of file XrdOucReqID.cc.

{
   char ybuff[256], xbuff[512];
   unsigned int pHash;
   int n, eNow = static_cast<unsigned int>(time(0));
 
// Encode our address as the prefix
//
   if ( (n = XrdNetUtils::Encode(myAddr, ybuff, sizeof(ybuff), myPort)) <= 0)
      n = sprintf(ybuff, "%04X%08X", myPort, eNow);
   reqPFX    = strdup(ybuff);
   reqPFXlen = n;
   reqIntern = n+1;
 
// Generate out hash
//
   pHash = XrdOucCRC::CRC32((const unsigned char *)ybuff, n);
 
// Now format the formatting template
//
   snprintf(xbuff, sizeof(xbuff)-1, "%s:%08x.%08x:%%d", ybuff, pHash, eNow);
   reqFMT = strdup(xbuff);
   reqNum = 0;
}

References XrdOucCRC::CRC32(), and XrdNetUtils::Encode().

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~XrdOucReqID()

XrdOucReqID::~XrdOucReqID ( )

inline

Definition at line 56 of file XrdOucReqID.hh.

{} // Statics go away at exit

Member Function Documentation

ID()

char * XrdOucReqID::ID	(	char *	buff,
		int	blen
	)

Definition at line 139 of file XrdOucReqID.cc.

{
   int myNum;
 
// Get a new sequence number
//
   myMutex.Lock();
   myNum = (reqNum += 1);
   myMutex.UnLock();
 
// Generate the request id and return it
//
   snprintf(buff, blen-1, reqFMT, myNum);
   return buff+reqIntern;
}

References XrdSysMutex::Lock(), and XrdSysMutex::UnLock().

Referenced by XrdOssSys::Stage_QT().

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Index()

int XrdOucReqID::Index ( int  KeyMax, const char *  KeyVal, int  KeyLen = 0  )

static

Definition at line 159 of file XrdOucReqID.cc.

{
   unsigned int pHash;
 
// Get hash value for the key and return modulo of the KeyMax value
//
   pHash = XrdOucCRC::CRC32((const unsigned char *)KeyVal,
                            (KeyLen ? KeyLen : strlen(KeyVal)));
   return (int)(pHash % KeyMax);
}

References XrdOucCRC::CRC32().

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isMine()

char * XrdOucReqID::isMine	(	char *	reqid,
		int &	hport,
		char *	hname,
		int	hlen
	)

Definition at line 100 of file XrdOucReqID.cc.

{
   XrdNetAddr theAddr;
   XrdNetSockAddr IP;
   const char *theHost;
   int thePort;
   char *cp;
 
// Determine whether this is our host
//
   if (!strncmp(reqPFX,reqid,reqPFXlen) && (cp = index(reqid,':'))) return cp+1;
 
// Not ours, try to tell the caller who it is
//
   hport = 0;
   if (!hlen) return 0;
 
// Get the IP address of his id
//
   thePort = XrdNetUtils::Decode(&IP, reqid, reqPFXlen);
   if (thePort <= 0) return 0;
 
// Convert this in the appropriate way
//
   if (theAddr.Set(&IP.Addr)
   ||  !(theHost = theAddr.Name())
   ||  strlen(theHost) >= (unsigned int)hlen) return 0;
 
// Return the alternate host
//
   strcpy(hname, theHost);
   hport = thePort;
   return 0;
}

References XrdNetSockAddr::Addr, XrdNetUtils::Decode(), XrdNetAddrInfo::Name(), and XrdNetAddr::Set().

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PFX()

char* XrdOucReqID::PFX ( )

inline

Definition at line 49 of file XrdOucReqID.hh.

{return reqPFX;}

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The documentation for this class was generated from the following files:

• XrdOucReqID.hh
• XrdOucReqID.cc