varp.cc
上传用户:rrhhcc
上传日期:2015-12-11
资源大小:54129k
文件大小:3k
- /* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
- /*
- * Copyright (c) 1996 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 Computer Systems
- * Engineering Group at Lawrence Berkeley Laboratory and the Daedalus
- * research group at UC Berkeley.
- * 4. Neither the name of the University nor of the Laboratory 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.
- */
- #include "varp.h"
- #include "mac.h"
- #include "packet.h"
- static class VARPTableClass : public TclClass {
- public:
- VARPTableClass() : TclClass("VARPTable") {}
- TclObject* create(int, const char*const*) {
- return (new VARPTable);
- }
- } class_VARPTable;
- VARPTable::VARPTable(void) : TclObject(), maddr_(0), size_(0)
- {}
- VARPTable::~VARPTable(void)
- {
- delete [] maddr_;
- }
- void VARPTable::sizeinit(int n)
- {
- int *temp = maddr_;
- int osize = size_;
- int i;
-
- if (size_ == 0)
- size_ = 10;
- while(!(n < size_))
- size_ = 2*size_;
- maddr_ = new int[size_];
- for (i=0;i<osize;i++)
- maddr_[i] = temp[i];
- for (i=osize;i<size_;i++)
- maddr_[i] = -1;
- delete [] temp;
- }
- int VARPTable::command(int argc, const char*const* argv) {
- if (argc == 4) {
- if (strcmp(argv[1], "mac-addr") == 0) {
- int n = atoi(argv[2]);
- if(!(n < size_))
- sizeinit(n);
-
- maddr_[n] = atoi(argv[3]);
- return (TCL_OK);
- }
- }
- return TclObject::command(argc, argv);
- }
- int VARPTable::arpresolve(int IPaddr, Packet* p) {
- if (IPaddr > size_)
- return 1;
- int ma = maddr_[IPaddr];
- if (ma >= 0) {
- HDR_MAC(p)->macDA_ = ma;
- return 0;
- }
- return 1;
- }