classifier-addr.cc
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- /* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
- /*
- * Copyright (c) 1996-1997 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
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #ifndef lint
- static const char rcsid[] =
- "@(#) $Header: /cvsroot/nsnam/ns-2/classifier/classifier-addr.cc,v 1.28 2006/02/21 15:20:17 mahrenho Exp $";
- #endif
- #include "classifier-addr.h"
- int AddressClassifier::classify(Packet *p) {
- hdr_ip* iph = hdr_ip::access(p);
- return mshift(iph->daddr());
- }
- static class AddressClassifierClass : public TclClass {
- public:
- AddressClassifierClass() : TclClass("Classifier/Addr") {}
- TclObject* create(int, const char*const*) {
- return (new AddressClassifier());
- }
- } class_address_classifier;
- /* added for mobileip code Ya, 2/99*/
-
- static class ReserveAddressClassifierClass : public TclClass {
- public:
- ReserveAddressClassifierClass() : TclClass("Classifier/Addr/Reserve") {}
- TclObject* create(int, const char*const*) {
- return (new ReserveAddressClassifier());
- }
- } class_reserve_address_classifier;
-
- int ReserveAddressClassifier::command(int argc, const char*const* argv)
- {
- // Tcl& tcl = Tcl::instance();
- if (argc == 3 && strcmp(argv[1],"reserve-port") == 0) {
- reserved_ = atoi(argv[2]);
- alloc((maxslot_ = reserved_ - 1));
- return(TCL_OK);
- }
- return (AddressClassifier::command(argc, argv));
- }
-
- void ReserveAddressClassifier::clear(int slot)
- {
- slot_[slot] = 0;
- if (slot == maxslot_) {
- while (--maxslot_ >= reserved_ && slot_[maxslot_] == 0)
- ;
- }
- }
-
- int ReserveAddressClassifier::classify(Packet *p) {
- hdr_ip* iph = hdr_ip::access(p);
- return iph->dport();
- }
- int ReserveAddressClassifier::getnxt(NsObject *nullagent)
- {
- int i;
- for (i=reserved_; i < nslot_; i++)
- if (slot_[i]==0 || slot_[i]==nullagent)
- return i;
- i=nslot_;
- alloc(nslot_);
- return i;
- }
- static class BcastAddressClassifierClass : public TclClass {
- public:
- BcastAddressClassifierClass() : TclClass("Classifier/Hash/Dest/Bcast") {}
- TclObject* create(int, const char*const*) {
- return (new BcastAddressClassifier());
- }
- } class_bcast_address_classifier;
-
- NsObject* BcastAddressClassifier::find(Packet* p)
- {
- NsObject* node = NULL;
- int cl = classify(p);
- if (cl < 0 || cl >= nslot_ || (node = slot_[cl]) == 0) {
- if (cl == BCAST_ADDR_MASK) {
- // limited broadcast; assuming no such packet
- // would be delivered back to sender
- return bcast_recver_;
- }
- if (default_target_)
- return default_target_;
-
- /*
- * Sigh. Can't pass the pkt out to tcl because it's
- * not an object.
- */
- Tcl::instance().evalf("%s no-slot %d", name(), cl);
- /*
- * Try again. Maybe callback patched up the table.
- */
- cl = classify(p);
- if (cl < 0 || cl >= nslot_ || (node = slot_[cl]) == 0)
- return (NULL);
- }
-
- return (node);
- }
-
- int BcastAddressClassifier::command(int argc, const char*const* argv)
- {
- // Tcl& tcl = Tcl::instance();
- if (argc == 3 && strcmp(argv[1],"bcast-receiver") == 0) {
- bcast_recver_ = (NsObject*)TclObject::lookup(argv[2]);
- return(TCL_OK);
- }
- return (AddressClassifier::command(argc, argv));
- }