transporterdefinitions.hpp

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/* Copyright (C) 2003 MySQL AB

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program 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 General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

#ifndef TransporterDefinitions_H
#define TransporterDefinitions_H

#include <ndb_global.h> 
#include <kernel_types.h> 
#include <NdbOut.hpp>

/**
 * The maximum number of transporters allowed
 * A maximum is needed to be able to allocate the array of transporters
 */
const int MAX_NTRANSPORTERS = 128;

/**
 * The sendbuffer limit after which the contents of the buffer is sent
 */
const int TCP_SEND_LIMIT = 64000;

enum SendStatus { 
  SEND_OK = 0, 
  SEND_BLOCKED = 1, 
  SEND_DISCONNECTED = 2, 
  SEND_BUFFER_FULL = 3,
  SEND_MESSAGE_TOO_BIG = 4,
  SEND_UNKNOWN_NODE = 5
};

/**
 * Protocol6 Header + 
 *  (optional signal id) + (optional checksum) + (signal data)
 */
//const Uint32 MAX_MESSAGE_SIZE = (12+4+4+(4*25));
const Uint32 MAX_MESSAGE_SIZE = (12+4+4+(4*25)+(3*4)+4*4096);

/**
 * TransporterConfiguration
 *
 * used for setting up a transporter. the union member specific is for
 * information specific to a transporter type.
 */
struct TransporterConfiguration {
  Int32 s_port; // negative port number implies dynamic port
  const char *remoteHostName;
  const char *localHostName;
  NodeId remoteNodeId;
  NodeId localNodeId;
  NodeId serverNodeId;
  bool checksum;
  bool signalId;
  bool isMgmConnection; // is a mgm connection, requires transforming

  union { // Transporter specific configuration information

    struct {
      Uint32 sendBufferSize;     // Size of SendBuffer of priority B 
      Uint32 maxReceiveSize;     // Maximum no of bytes to receive
    } tcp;
    
    struct {
      Uint32 shmKey;
      Uint32 shmSize;
      int    signum;
    } shm;
    
    struct {
      Uint32 prioASignalSize;
      Uint32 prioBSignalSize;
    } ose;

    struct {
      Uint32 sendLimit;        // Packet size
      Uint32 bufferSize;       // Buffer size
      
      Uint32 nLocalAdapters;   // 1 or 2, the number of adapters on local host
      
      Uint32 remoteSciNodeId0; // SCInodeId for adapter 1
      Uint32 remoteSciNodeId1; // SCInodeId for adapter 2
    } sci;
  };
};

struct SignalHeader {	
  Uint32 theVerId_signalNumber;    // 4 bit ver id - 16 bit gsn
  Uint32 theReceiversBlockNumber;  // Only 16 bit blocknum  
  Uint32 theSendersBlockRef;
  Uint32 theLength;
  Uint32 theSendersSignalId;
  Uint32 theSignalId;
  Uint16 theTrace;
  Uint8  m_noOfSections;
  Uint8  m_fragmentInfo;
}; /** 7x4 = 28 Bytes */

struct LinearSectionPtr {
  Uint32 sz;
  Uint32 * p;
};

struct SegmentedSectionPtr {
  Uint32 sz;
  Uint32 i;
  struct SectionSegment * p;

  void setNull() { p = 0;}
  bool isNull() const { return p == 0;}
};

class NdbOut & operator <<(class NdbOut & out, SignalHeader & sh);

#endif // Define of TransporterDefinitions_H