ns-packet.tcl
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- # -*- Mode:tcl; tcl-indent-level:8; tab-width:8; indent-tabs-mode:t -*-
- #
- # Time-stamp: <2000-08-31 19:01:26 haoboy>
- #
- # 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
- # 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.
- #
- # @(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/tcl/lib/ns-packet.tcl,v 1.55 2005/06/17 17:41:16 sfloyd Exp $
- #
- # set up the packet format for the simulation
- # (initial version)
- #
- #
- # XXX Packet Header Usage Guide
- #
- # By default, ns includes ALL packet headers of ALL protocols in ns in
- # EVERY packet in your simulation. This is a LOT, and will increase as more
- # protocols are added into ns. For "packet-intensive" simulations, this could
- # be a huge overhead.
- #
- # To include only the packet headers that are of interest to you in your
- # specific simulation, follow this pattern (e.g., you want to remove AODV,
- # and ARP headers from your simulation):
- #
- # remove-packet-header AODV ARP
- # ...
- # set ns [new Simulator]
- #
- # NOTICE THAT ADD-PACKET-HEADER{} MUST GO BEFORE THE SIMULATOR IS CREATED.
- #
- # To include only a specific set of headers in your simulation, e.g., AODV
- # and ARP, follow this pattern:
- #
- # remove-all-packet-headers
- # add-packet-header AODV ARP
- # ...
- # set ns [new Simulator]
- #
- # IMPORTANT: You MUST never remove common header from your simulation.
- # As you can see, this is also enforced by these header manipulation procs.
- #
- PacketHeaderManager set hdrlen_ 0
- # XXX Common header should ALWAYS be present
- PacketHeaderManager set tab_(Common) 1
- proc add-packet-header args {
- foreach cl $args {
- PacketHeaderManager set tab_(PacketHeader/$cl) 1
- }
- }
- proc add-all-packet-headers {} {
- PacketHeaderManager instvar tab_
- foreach cl [PacketHeader info subclass] {
- if [info exists tab_($cl)] {
- PacketHeaderManager set tab_($cl) 1
- }
- }
- }
- proc remove-packet-header args {
- foreach cl $args {
- if { $cl == "Common" } {
- warn "Cannot exclude common packet header."
- continue
- }
- PacketHeaderManager unset tab_(PacketHeader/$cl)
- }
- }
- proc remove-all-packet-headers {} {
- PacketHeaderManager instvar tab_
- foreach cl [PacketHeader info subclass] {
- if { $cl != "PacketHeader/Common" } {
- if [info exists tab_($cl)] {
- PacketHeaderManager unset tab_($cl)
- }
- }
- }
- }
- foreach prot {
- # Common:
- Common
- Flags
- IP # IP
- # Routing Protocols:
- NV # NixVector classifier for stateless routing
- rtProtoDV # distance vector routing protocol
- rtProtoLS # link state routing protocol
- SR # source routing, dsr/hdr_sr.cc
- Src_rt # source routing, src_rtg/hdr_src.cc
- # Routers:
- LDP # mpls/ldp.cc
- MPLS # MPLS, MultiProtocol Label Switching
- Resv # Token buckets, for reservations.
- UMP # Admission control, adc/ump.cc
- Pushback # Pushback, router-to-router
- # Multicast:
- aSRM # mcast/srm.cc
- CtrMcast # Centralized Multicast routing
- mcastCtrl # mcast/mcast_ctrl.cc
- MFTP # Multicast File Transfer Protocol
- PGM # PGM multicast
- PGM_SPM # PGM multicast
- PGM_NAK # PGM multicast
- SRM # SRM, multicast
- SRMEXT # SRM, multicast
- # Transport Protocols and related protocols:
- HttpInval # HTTP
- IVS # Inria video conferencing system
- QS # Quick-Start
- RAP # Rate Adaption Protocol, transport protocol.
- RTP # RTP. Also used for UPD traffic.
- SCTP # SCTP, transport protocol
- Snoop # tcp/snoop.cc
- TCP # TCP, transport protocol
- TCPA # Asymmetric TCP, transport protocol
- TFRC # TFRC, transport protocol
- TFRC_ACK # TFRC, transport protocol
- XCP # XCP, transport protocol
- # Application-Layer Protocols:
- Message # a protocol to carry text messages
- Ping # Ping
- # Wireless:
- ARP # Address Resolution Protocol, network wireless stack
- GAF # Geographic Adaptive Delity, for ad-hoc networks
- LL # network wireless stack
- LRWPAN # zheng, wpan/p802_15_4mac.cc
- Mac # network wireless stack
- # Mobility, Ad-Hoc Networks, Sensor Nets:
- AODV # routing protocol for ad-hoc networks
- Diffusion # diffusion/diffusion.cc
- IMEP # Internet MANET Encapsulation Protocol, for ad-hoc networks
- MIP # Mobile IP, mobile/mip-reg.cc
- Smac # Sensor-MAC
- TORA # routing protocol for ad-hoc networks
- # Other:
- Encap # common/encap.cc
- IPinIP # IP encapsulation
- HDLC # High Level Data Link Control
- # WIMAX:
- 802_16 # Mac IEEE 802.16
- } {
- add-packet-header $prot
- }
- proc PktHdr_offset { hdrName {field ""} } {
- set offset [$hdrName offset]
- if { $field != "" } {
- # This requires that fields inside the packet header must
- # be exported via PacketHeaderClass::export_offsets(), which
- # should use PacketHeaderClass::field_offset() to export
- # field offsets into otcl space.
- incr offset [$hdrName set offset_($field)]
- }
- return $offset
- }
- Simulator instproc create_packetformat { } {
- PacketHeaderManager instvar tab_
- set pm [new PacketHeaderManager]
- foreach cl [PacketHeader info subclass] {
- if [info exists tab_($cl)] {
- set off [$pm allochdr $cl]
- $cl offset $off
- }
- }
- $self set packetManager_ $pm
- }
- PacketHeaderManager instproc allochdr cl {
- set size [$cl set hdrlen_]
- $self instvar hdrlen_
- set NS_ALIGN 8
- # round up to nearest NS_ALIGN bytes
- # (needed on sparc/solaris)
- set incr [expr ($size + ($NS_ALIGN-1)) & ~($NS_ALIGN-1)]
- set base $hdrlen_
- incr hdrlen_ $incr
- return $base
- }
- # XXX Old code. Do NOT delete for now. - Aug 30, 2000
- # Initialization
- # foreach cl [PacketHeader info subclass] {
- # PacketHeaderManager set vartab_($cl) ""
- # }
- # So that not all packet headers should be initialized here.
- # E.g., the link state routing header is initialized using this proc in
- # ns-rtProtoLS.tcl; because link state may be turned off when STL is not
- # available, this saves us a ns-packet.tcl.in
- # proc create-packet-header { cl var } {
- # PacketHeaderManager set vartab_(PacketHeader/$cl) $var
- # }
- # If you need to save some memory, you can disable unneeded packet headers
- # by commenting them out from the list below
- # foreach pair {
- # { Common off_cmn_ }
- # { Mac off_mac_ }
- # { LL off_ll_ }
- # { ARP off_arp_ }
- # { Snoop off_snoop_ }
- # { SR off_SR_ }
- # { IP off_ip_ }
- # { TCP off_tcp_ }
- # { TCPA off_tcpasym_ }
- # { Flags off_flags_ }
- # { TORA off_TORA_ }
- # { AODV off_AODV_ }
- # { IMEP off_IMEP_ }
- # { RTP off_rtp_ }
- # { Message off_msg_ }
- # { IVS off_ivs_ }
- # { rtProtoDV off_DV_ }
- # { CtrMcast off_CtrMcast_ }
- # { mcastCtrl off_mcast_ctrl_ }
- # { aSRM off_asrm_ }
- # { SRM off_srm_ }
- # { SRMEXT off_srm_ext_}
- # { Resv off_resv_}
- # { HttpInval off_inv_}
- # { IPinIP off_ipinip_}
- # { MIP off_mip_}
- # { MFTP off_mftp_ }
- # { Encap off_encap_ }
- # { RAP off_rap_ }
- # { UMP off_ump_ }
- # { TFRC off_tfrm_ }
- # { Ping off_ping_ }
- # { rtProtoLS off_LS_ }
- # { MPLS off_mpls_ }
- # { GAF off_gaf_ }
- # { LDP off_ldp_ }
- # } {
- # create-packet-header [lindex $pair 0] [lindex $pair 1]
- # }
- # proc PktHdr_offset {hdrName {field ""}} {
- # set var [PacketHeaderManager set vartab_($hdrName)]
- # set offset [TclObject set $var]
- # if {$field != ""} {
- # incr offset [$hdrName set offset_($field)]
- # }
- # return $offset
- # }
- # Simulator instproc create_packetformat { } {
- # PacketHeaderManager instvar vartab_
- # set pm [new PacketHeaderManager]
- # foreach cl [PacketHeader info subclass] {
- # if {[info exists vartab_($cl)] && $vartab_($cl) != ""} {
- # set off [$pm allochdr [lindex [split $cl /] 1]]
- # set var [PacketHeaderManager set vartab_($cl)]
- # TclObject set $var $off
- # $cl offset $off
- # }
- # }
- # $self set packetManager_ $pm
- # }