mpls-module.cc

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/* -*-  Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- 
 *
 * Copyright (C) 2000 by USC/ISI
 * All rights reserved.                                            
 *                                                                
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation, advertising
 * materials, and other materials related to such distribution and use
 * acknowledge that the software was developed by the University of
 * Southern California, Information Sciences Institute.  The name of the
 * University may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * $Header: /nfs/jade/vint/CVSROOT/ns-2/mpls/mpls-module.cc,v 1.3 2001/02/22 19:45:40 haldar Exp $
 *
 * MPLS node plugin module
 */

#include <tclcl.h>

#include "node.h"
#include "mpls/ldp.h"
#include "mpls/mpls-module.h"
#include "mpls/classifier-addr-mpls.h"

static class MPLSModuleClass : public TclClass {
public:
        MPLSModuleClass() : TclClass("RtModule/MPLS") {}
        TclObject* create(int, const char*const*) {
                return (new MPLSModule);
        }
} class_mpls_module;

MPLSModule::~MPLSModule() 
{
        // Delete LDP agent list
        LDPListElem *e;
        for (LDPListElem *p = ldplist_.lh_first; p != NULL; ) {
                e = p;
                p = p->link.le_next;
                delete e;
        }
}

void MPLSModule::detach_ldp(LDPAgent *a)
{
        for (LDPListElem *p = ldplist_.lh_first; p != NULL; 
             p = p->link.le_next)
                if (p->agt_ == a) {
                        LIST_REMOVE(p, link);
                        delete p;
                        break;
                }
}

LDPAgent* MPLSModule::exist_ldp(int nbr)
{
        for (LDPListElem *p = ldplist_.lh_first; p != NULL; 
             p = p->link.le_next)
                if (p->agt_->peer() == nbr)
                        return p->agt_;
        return NULL;
}

int MPLSModule::command(int argc, const char*const* argv)
{
        Tcl& tcl = Tcl::instance();
        if (argc == 2) {
                if (strcmp(argv[1], "new-incoming-label") == 0) {
                        tcl.resultf("%d", ++last_inlabel_);
                        return (TCL_OK);
                } else if (strcmp(argv[1], "new-outgoing-label") == 0) {
                        tcl.resultf("%d", --last_outlabel_);
                        return (TCL_OK);
                } else if (strcmp(argv[1], "get-ldp-agents") == 0) {
                        for (LDPListElem *e = ldplist_.lh_first; e != NULL;
                             e = e->link.le_next)
                                tcl.resultf("%s %s", tcl.result(), 
                                            e->agt_->name());
                        return (TCL_OK);
                } else if (strcmp(argv[1], "trace-ldp") == 0) {
                        for (LDPListElem *e = ldplist_.lh_first; e != NULL;
                             e = e->link.le_next)
                                e->agt_->turn_on_trace();
                        return (TCL_OK);
                } else if (strcmp(argv[1], "trace-msgtbl") == 0) {
                        printf("%d : message-table\n", node()->nodeid());
                        for (LDPListElem *e = ldplist_.lh_first; e != NULL;
                             e = e->link.le_next)
                                e->agt_->MSGTdump();
                        return (TCL_OK);
                }
        } else if (argc == 3) {
                if (strcmp(argv[1], "attach-ldp") == 0) {
                        LDPAgent *a = (LDPAgent*)TclObject::lookup(argv[2]);
                        if (a == NULL) {
                                fprintf(stderr,"Wrong object name %s",argv[2]);
                                return (TCL_ERROR);
                        }
                        attach_ldp(a);
                        return (TCL_OK);
                } else if (strcmp(argv[1], "detach-ldp") == 0) {
                        LDPAgent *a = (LDPAgent*)TclObject::lookup(argv[2]);
                        if (a == NULL) {
                                fprintf(stderr,"Wrong object name %s",argv[2]);
                                return (TCL_ERROR);
                        }
                        detach_ldp(a);
                        return (TCL_OK);
                } else if (strcmp(argv[1], "exist-ldp-agent") == 0) {
                        tcl.resultf("%d", 
                                    exist_ldp(atoi(argv[2])) == NULL ? 0 : 1 );
                        return (TCL_OK);
                } else if (strcmp(argv[1], "get-ldp-agent") == 0) {
                        LDPAgent *a = exist_ldp(atoi(argv[2]));
                        if (a == NULL)
                                tcl.result("");
                        else 
                                tcl.resultf("%s", a->name());
                        return (TCL_OK);
                }
                else if (strcmp(argv[1] , "route-notify") == 0) {
                        Node *node = (Node *)(TclObject::lookup(argv[2]));
                        if (node == NULL) {
                                tcl.add_errorf("Invalid node object %s", argv[2]);
                                return TCL_ERROR;
                        }
                        if (node != n_) {
                                tcl.add_errorf("Node object %s different from n_", argv[2]);
                                return TCL_ERROR;
                        }
                        n_->route_notify(this);
                        return TCL_OK;
                }
                if (strcmp(argv[1] , "unreg-route-notify") == 0) {
                        Node *node = (Node *)(TclObject::lookup(argv[2]));
                        if (node == NULL) {
                                tcl.add_errorf("Invalid node object %s", argv[2]);
                                return TCL_ERROR;
                        }
                        if (node != n_) {
                                tcl.add_errorf("Node object %s different from n_", argv[2]);
                                return TCL_ERROR;
                        }
                        n_->unreg_route_notify(this);
                        return TCL_OK;
                }
                else if (strcmp(argv[1], "attach-classifier") == 0) {
                        classifier_ = (MPLSAddressClassifier*)(TclObject::lookup(argv[2]));
                        if (classifier_ == NULL) {
                                tcl.add_errorf("Wrong object name %s",argv[2]);
                                return TCL_ERROR;
                        }
                        return TCL_OK;
                }
        }
        return RoutingModule::command(argc, argv);
}

void MPLSModule::add_route(char *dst, NsObject *target) {
        if (classifier_) 
                ((MPLSAddressClassifier *)classifier_)->do_install(dst, target);
        if (next_rtm_ != NULL)
                next_rtm_->add_route(dst, target); 
}

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