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/* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
* Copyright (c) 1994-1997 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 Computer Systems
* Engineering Group at Lawrence Berkeley Laboratory.
* 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.
*/
#ifndef lint
static const char rcsid[] =
"@(#) $Header: /cvsroot/nsnam/ns-2/common/packet.cc,v 1.19 2008/02/18 03:39:02 tom_henderson Exp $ (LBL)";
#endif
#include "packet.h"
#include "flags.h"
p_info packet_info;
char** p_info::name_;
unsigned int p_info::nPkt_ = 0;
PacketClassifier *p_info::pc_ = 0;
int p_info::addPacket(char *name)
{
if(!nPkt_)
initName();
int newID = nPkt_-1;
PT_NTYPE = nPkt_;
initName();
name_[newID] = name;
return newID;
}
int Packet::hdrlen_ = 0; // size of a packet's header
Packet* Packet::free_; // free list
int hdr_cmn::offset_; // static offset of common header
int hdr_flags::offset_; // static offset of flags header
PacketHeaderClass::PacketHeaderClass(const char* classname, int hdrlen) :
TclClass(classname), hdrlen_(hdrlen), offset_(0)
{
}
TclObject* PacketHeaderClass::create(int, const char*const*)
{
return (0);
}
void PacketHeaderClass::bind()
{
TclClass::bind();
Tcl& tcl = Tcl::instance();
tcl.evalf("%s set hdrlen_ %d", classname_, hdrlen_);
export_offsets();
add_method("offset");
}
void PacketHeaderClass::export_offsets()
{
}
void PacketHeaderClass::field_offset(const char* fieldname, int offset)
{
Tcl& tcl = Tcl::instance();
tcl.evalf("%s set offset_(%s) %d", classname_, fieldname, offset);
}
int PacketHeaderClass::method(int ac, const char*const* av)
{
Tcl& tcl = Tcl::instance();
int argc = ac - 2;
const char*const* argv = av + 2;
if (argc == 3) {
if (strcmp(argv[1], "offset") == 0) {
if (offset_) {
*offset_ = atoi(argv[2]);
return TCL_OK;
}
tcl.resultf("Warning: cannot set offset_ for %s",
classname_);
return TCL_OK;
}
}
else if (argc == 2) {
if (strcmp(argv[1], "offset") == 0) {
if (offset_) {
tcl.resultf("%d", *offset_);
return TCL_OK;
}
}
}
return TclClass::method(ac, av);
}
class CommonHeaderClass : public PacketHeaderClass {
public:
CommonHeaderClass() : PacketHeaderClass("PacketHeader/Common",
sizeof(hdr_cmn)) {
bind_offset(&hdr_cmn::offset_);
}
void export_offsets() {
field_offset("ptype_", OFFSET(hdr_cmn, ptype_));
field_offset("size_", OFFSET(hdr_cmn, size_));
field_offset("uid_", OFFSET(hdr_cmn, uid_));
field_offset("error_", OFFSET(hdr_cmn, error_));
};
} class_cmnhdr;
class FlagsHeaderClass : public PacketHeaderClass {
public:
FlagsHeaderClass() : PacketHeaderClass("PacketHeader/Flags",
sizeof(hdr_flags)) {
bind_offset(&hdr_flags::offset_);
}
} class_flagshdr;
/* manages active packet header types */
class PacketHeaderManager : public TclObject {
public:
PacketHeaderManager() {
bind("hdrlen_", &Packet::hdrlen_);
}
};
static class PacketHeaderManagerClass : public TclClass {
public:
PacketHeaderManagerClass() : TclClass("PacketHeaderManager") {}
TclObject* create(int, const char*const*) {
return (new PacketHeaderManager);
}
} class_packethdr_mgr;
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