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// -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*-
/*
* ldp.h
* Copyright (C) 2000 by the University of Southern California
* $Id: ldp.h,v 1.4 2005/08/25 18:58:09 johnh Exp $
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* 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.
*
*
* The copyright of this module includes the following
* linking-with-specific-other-licenses addition:
*
* In addition, as a special exception, the copyright holders of
* this module give you permission to combine (via static or
* dynamic linking) this module with free software programs or
* libraries that are released under the GNU LGPL and with code
* included in the standard release of ns-2 under the Apache 2.0
* license or under otherwise-compatible licenses with advertising
* requirements (or modified versions of such code, with unchanged
* license). You may copy and distribute such a system following the
* terms of the GNU GPL for this module and the licenses of the
* other code concerned, provided that you include the source code of
* that other code when and as the GNU GPL requires distribution of
* source code.
*
* Note that people who make modified versions of this module
* are not obligated to grant this special exception for their
* modified versions; it is their choice whether to do so. The GNU
* General Public License gives permission to release a modified
* version without this exception; this exception also makes it
* possible to release a modified version which carries forward this
* exception.
*
*/
// Other copyrights might apply to parts of this software and are so
// noted when applicable.
//
// Original source contributed by Gaeil Ahn. See below.
//
// $Header: /cvsroot/nsnam/ns-2/mpls/ldp.h,v 1.4 2005/08/25 18:58:09 johnh Exp $
/**************************************************************************
* Copyright (c) 2000 by Gaeil Ahn *
* Everyone is permitted to copy and distribute this software. *
* Please send mail to fog1@ce.cnu.ac.kr when you modify or distribute *
* this sources. *
**************************************************************************/
/***********************************************************
* *
* File: Header File for LDP & CR-LDP protocol *
* Author: Gaeil Ahn (fog1@ce.cnu.ac.kr), Jan. 2000 *
* *
***********************************************************/
#ifndef ns_ldp_h
#define ns_ldp_h
#include "agent.h"
#include "tclcl.h"
#include "packet.h"
#include "address.h"
#include "ip.h"
const int LDP_MaxMSGTEntryNB = 100;
/* LDP msg types */
const int LDP_NotificationMSG = 0x0001;
const int LDP_MappingMSG = 0x0400;
const int LDP_RequestMSG = 0x0401;
const int LDP_WithdrawMSG = 0x0402;
const int LDP_ReleaseMSG = 0x0403;
const int LDP_LoopDetected = 0x000B;
const int LDP_NoRoute = 0x000D;
const int LDP_LabelALLOC = 0;
const int LDP_LabelPASS = 1;
const int LDP_LabelSTACK = 2;
struct hdr_ldp {
int msgtype;
int msgid; // request msg id (mapping msg triggered by request
// msg). if (msgid > -1): by request, else: no
int fec;
int label;
int reqmsgid;
int status; // for Notification
// XXX This is VERY BAD behavior! Should NEVER put a pointer
// in a packet header!!
char *pathvec;
// The following is for CR-LSP
char *er;
int lspid;
int rc;
// Header access methods
static int offset_; // required by PacketHeaderManager
inline static int& offset() { return offset_; }
inline static hdr_ldp* access(const Packet* p) {
return (hdr_ldp*)p->access(offset_);
}
};
// Used for supporting ordered distribuiton mode (Explicit LSP)
struct MsgTable {
int MsgID;
int FEC;
int LspID;
int Src;
int PMsgID; // previsou msg-id
int LabelOp; // LabelALLOC, LabelPASS, or LabelSTACK
int ERLspID;
};
struct MsgT {
MsgTable Entry[LDP_MaxMSGTEntryNB];
int NB;
};
class LDPAgent : public Agent {
public:
LDPAgent();
virtual int command(int argc, const char*const* argv);
virtual void recv(Packet*, Handler*);
virtual void delay_bind_init_all();
virtual int delay_bind_dispatch(const char *, const char *,
TclObject *);
inline int peer() const { return peer_; }
inline void turn_on_trace() { trace_ldp_ = 1; }
void PKTinit(hdr_ldp *hdrldp, int msgtype, const char *pathvec,
const char *er);
int PKTsize(const char *pathvec, const char *er);
int MSGTinsert(int MsgID, int FEC, int LspID, int Src, int PMsgID);
void MSGTdelete(int entrynb);
int MSGTlocate(int MsgID);
int MSGTlocate(int FEC,int LspID,int Src);
void MSGTlookup(int entrynb, int &MsgID, int &FEC, int &LspID,
int &src, int &PMsgID, int &LabelOp);
void MSGTdump();
protected:
int new_msgid_;
int trace_ldp_;
int peer_;
void trace(ns_addr_t src, hdr_ldp *hdrldp);
char* parse_msgtype(int msgtype, int lspid);
char* parse_status(int status);
MsgT MSGT_;
};
#endif
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