connector.cc

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/* -*-  Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
 * Copyright (c) 1997 Regents of the University of California.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the MASH Research
 *      Group at the University of California Berkeley.
 * 4. Neither the name of the University nor of the Research Group may be
 *    used to endorse or promote products derived from this software without
 *    specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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#ifndef lint
static const char rcsid[] =
    "@(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/common/connector.cc,v 1.14 1998/12/08 23:43:05 haldar Exp $ ";
#endif

#include "packet.h"
#include "connector.h"

static class ConnectorClass : public TclClass {
public:
        ConnectorClass() : TclClass("Connector") {}
        TclObject* create(int, const char*const*) {
                return (new Connector);
        }
} class_connector;

Connector::Connector() : target_(0), drop_(0)
{
}


int Connector::command(int argc, const char*const* argv)
{
        Tcl& tcl = Tcl::instance();
        /*XXX*/
        if (argc == 2) {
                if (strcmp(argv[1], "target") == 0) {
                        if (target_ != 0)
                                tcl.result(target_->name());
                        return (TCL_OK);
                }
                if (strcmp(argv[1], "drop-target") == 0) {
                        if (drop_ != 0)
                                tcl.resultf("%s", drop_->name());
                        return (TCL_OK);
                }
                if (strcmp(argv[1], "isDynamic") == 0) {
                        return TCL_OK;
                }
        }

        else if (argc == 3) {
                if (strcmp(argv[1], "target") == 0) {
                        if (*argv[2] == '0') {
                                target_ = 0;
                                return (TCL_OK);
                        }
                        target_ = (NsObject*)TclObject::lookup(argv[2]);
                        if (target_ == 0) {
                                tcl.resultf("no such object %s", argv[2]);
                                return (TCL_ERROR);
                        }
                        return (TCL_OK);
                }
                if (strcmp(argv[1], "drop-target") == 0) {
                        drop_ = (NsObject*)TclObject::lookup(argv[2]);
                        if (drop_ == 0) {
                                tcl.resultf("no object %s", argv[2]);
                                return (TCL_ERROR);
                        }
                        return (TCL_OK);
                }
        }
        return (NsObject::command(argc, argv));
}

void Connector::recv(Packet* p, Handler* h)
{
        send(p, h);
}

void Connector::drop(Packet* p)
{
        if (drop_ != 0)
                drop_->recv(p);
        else
                Packet::free(p);
}

void Connector::drop(Packet* p, const char *s)
{
        if (drop_ != 0)
                drop_->recv(p, s);
        else
                Packet::free(p);
}

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