#!/usr/bin/tclsh
+# core packet generator for vinegar-ip
+#
+# This file is part of vinegar-ip, tools for IP transparency testing.
+# vinegar-ip is Copyright (C) 2002 Ian Jackson
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# $Id$
proc debug {level str} {
global debug_level
set cs [expr "\$cs + 0x$this"]
debug 7 [format "0x%s 0x%08x" $this $cs]
}
- return [expr {(($cs & 0xffff) + (($cs >> 16) & 0xffff)) ^ 0xffff}]
+ while {$cs > 0xffff} {
+ set cs [expr {($cs & 0xffff) + (($cs >> 16) & 0xffff)}]
+ }
+ return [expr {$cs ^ 0xffff}]
}
proc packet-fromstring {s} {
}
return [format 0x%02x%02x%02x%02x $a $b $c $d]
}
+proc get-config/linkaddr {val} {
+ return $val
+}
proc get-config {variable def kind args} {
# args currently ignored
get next number 0 255
get reserved hex 0 0xffff
get spi hex32
- get auth_data rand 0 [expr {$mtu-8}] 4
+ get auth_data rand 0 [expr {$mtu-8 > 50 ? 50 : $mtu-8}] 4
set length [packet-len $auth_data]
assemble ah {
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
return $ah
}
+proc udp-rport {} {
+ get-for udp
+ get port enum-rand 0 0xffff
+ return $port
+}
define ip-proto 17 udp {mtu} {
# RFC768
} else {
set def_port x
}
- if {"$style" != "servers"} {
- get port enum-rand 0 0xffff
- set rand_port $port
- }
switch -exact $style {
- random { set source_port $rand_port; set dest_port $rand_port }
- request { set source_port $rand_port; set dest_port $def_port }
- reply { set source_port $def_port; set dest_port $rand_port }
- servers { set source_port $def_port; set dest_port $def_port }
+ random { set source_port [udp-rport]; set dest_port [udp-rport] }
+ request { set source_port [udp-rport]; set dest_port $def_port }
+ reply { set source_port $def_port; set dest_port [udp-rport] }
+ servers { set source_port $def_port; set dest_port $def_port }
}
if {"$style" != "random"} {
get urg hex 0 0xffff
set options {}
- get optmode choice-mult badopt 0.3 opt 0.6 noopt
+ get optmode choice-mult badopt 0.3 opt 0.3 noopt
switch -exact $optmode {
noopt { }
badopt {
get options rand 1 60 1
}
opt {
- while {[choice-prob tcp-opts-more 0.4]} {
+ set nooi 1
+ while {$nooi || [choice-prob tcp-opts-more 0.4]} {
+ set nooi 0
get opt enum 1 255 0.5
if {$opt == 1} {
assemble option {
proc emit {seed} {
global getlog_log errorInfo mtu fake_time_t
- global minframelen
+ global minframelen linktypename
get-for ip
get-config source 127.0.0.1 v4addr
append packet [string repeat 00 [expr {$minframelen - $l}]]
}
- # RFC894
- set llpkt [random-bytes 12]
- append llpkt 0800
- append llpkt $packet
+ set llpkt [link/$linktypename/linkencap $packet]
set len [packet-len "$llpkt"]
pcap_write {
}
+# link/ether - RFC894
+proc link/ether/linkparams {} { return {1 46} }
+proc link/ether/defaddr {} { return 00:00:00:00:00:00 }
+proc link/ether/procaddr {input sd} {
+ set v [string tolower $input]
+ if {[regexp {^([0-9a-f]{1,2}\:){6}$} $v:]} {
+ set o {}
+ foreach b [split $v :] { append o [format %02x 0x$b] }
+ set v $o
+ }
+ if {![regexp -nocase {^[0-9a-f]{12}$} $v]} {
+ error "invalid $sd ethernet addr $input ($v)"
+ }
+ return $v
+}
+proc link/ether/linkencap {packet} {
+ global link_source link_dest
+ set llpkt {}
+ append llpkt $link_dest $link_source 0800
+ append llpkt $packet
+ return $llpkt
+}
+
+
proc nextarg {} {
global argv
if {![llength $argv]} { error "need another arg" }
}
proc nextarg_num {} { return [expr {[nextarg] + 0}] }
+proc nextarg_il {} {
+ set a [nextarg]
+ if {![regexp -nocase {^([0-9.]+)/(.+)$} $a dummy i l]} {
+ error "--source/--dest needs <ip-addr>/<link-addr>"
+ }
+ return [list $i $l]
+}
set debug_level 0
-set mtu 576
+set mtu 100
set upto {}
set xseed {}
+set linktypename ether
while {[regexp {^\-\-} [lindex $argv 0]]} {
set o [nextarg]
switch -exact -- $o {
--write { pcap_open [nextarg] }
--mtu { set mtu [nextarg_num] }
--xseed { set xseed [nextarg] }
- --source { set config/ip-source [nextarg] }
- --dest { set config/ip-dest [nextarg] }
+ --linktype { set linktypename [nextarg] }
+ --source { manyset [nextarg_il] config/ip-source config/link-source }
+ --dest { manyset [nextarg_il] config/ip-dest config/link-dest }
default { error "bad option $o" }
}
}
+proc process_linkaddr {sd} {
+ global linktypename
+ upvar #0 link_$sd l
+ get-for link
+ get-config $sd [link/$linktypename/defaddr] linkaddr
+ set l [link/$linktypename/procaddr [set $sd] $sd]
+}
+
+manyset [link/$linktypename/linkparams] linktype minframelen
+process_linkaddr source
+process_linkaddr dest
+
set magic d4c3b2a1
set version_major 2
set version_minor 4
set sigfigs 0
set snaplen 131073
-# RFC894
-set linktype 1
-set minframelen 46
-
pcap_write {
x32 magic
u16 version_major
~ianmdlvl / vinegar-ip.git / blobdiff