-#!/usr/bin/tclsh8.2
-
+#!/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
}
-proc start_gen {use_gen_counter} {
- global gen_counter rand_counter getlog_log rand_buf
- random-bytes-init $use_gen_counter
+proc start_gen {seed} {
+ global getlog_log
+ random-bytes-init $seed
set getlog_log {}
}
set cs [expr "\$cs + 0x$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} {
namespace export random-bytes random-bytes-init
proc random-bytes-init {seed} {
- variable counter
variable fh
catch { set h $fh; unset fh; close $h }
- set counter 0
set fh [open |[list openssl bf-ofb < /dev/zero -e -k " $seed"] r]
fconfigure $fh -translation binary
}
proc choice-prob {cv def} {
set prob [config $cv $def]
set rv 0x[random-bytes 3]
- return [expr {$rv < double($prob)*0x1000000}]
+ set rv [expr {$rv < double($prob)*0x1000000}]
+ debug 2 "choice-prob $rv <- $prob ($cv)"
+ return $rv
}
proc choice-mult {args} {
if {!([llength $args] % 2)} { error "choice-mult must have default" }
- set x 0x[random-bytes 3]
- set x [expr { double($x) / double(0x1000000) }]
+ set h 0x[random-bytes 3]
+ set x [expr { double($h) / double(0x1000000) }]
set cump 0.0
set def [lindex $args end]
set args [lreplace $args end end]
foreach {val p} $args {
set cump [expr {$cump + double($p)}]
- if {$x < $cump} { return $val }
+ if {$x < $cump} {
+ debug 2 "choice-mult $val <= [concat $args [list $def]]"
+ return $val
+ }
}
+ debug 2 "choice-mult $def <- [concat $args [list $def]]"
return $def
}
}
-proc define {enum val name argnames body} {
+proc define {enum val mult name argnames body} {
+ # mult may be:
+ # * full share of `known' enum values
+ # ? only as often as `random' enum values
+ # Or *<pct> or ?<pct> meaning <pct>/100 times as often as * or ?.
+
upvar #0 enum/val2name/$enum v2n
+ upvar #0 enum/val2mult/$enum v2m
upvar #0 enum/name2val/$enum n2v
+ foreach kind {? *} {
+ upvar #0 enum/total$kind/$enum total$kind
+ if {![info exists total$kind]} { set total$kind 0 }
+ }
+
+ regsub {^[?*]$} $mult {&100} mult
+ if {![regexp {^([?*])([0-9]+)$} $mult dummy kind times]} {
+ error "invalid mult $mult"
+ }
+
set v2n($val) $name
+ set v2m($val) [list $kind $times]
set n2v($name) $val
+ incr total$kind $times
+
proc enum/val/$enum/$val $argnames $body
}
[catch { info body $procname }]} {
getlog (junk)
get-for $scope-fill
- get data rand 0 $mtu
+ get data rand 0 $mtu 1
return $data
} else {
uplevel 1 [list $procname] $mtu $args
}
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
return [get-enum-got $s $v $rv]
}
-proc get/enum-def {s v} {
- upvar #0 enum/val2name/$s-$v v2n
- set rv [choice-int 1 [array size v2n]]
- set rv [lindex [array names v2n] [expr {$rv-1}]]
+proc enum-prepare-choice-list {s v nvalues prand} {
+ upvar #0 "enum/choice-list/$s-${v}($nvalues $prand)" cl
+ upvar #0 enum/val2mult/$s-$v v2m
+ upvar #0 enum/total*/$s-$v total*org
+ upvar #0 enum/total?/$s-$v total?
+
+ set total* ${total*org}
+ if {!${total*}} { set total* [expr {double(${total*org}) + 0.001}] }
+
+ set pr $prand
+ if {!${total?}} { set pr 0.0 }
+ set pm? [expr {$pr / (100.0*double($nvalues))}]
+ set pm* [expr {(1.0 - $pr) / double(${total*})}]
+ debug 1 "epcl $s-$v $nvalues $prand: pr $pr ? pm ${pm?} total ${total?} * pm ${pm*} total ${total*}"
+
+ set cl {}
+ foreach rv [lsort [array names v2m]] {
+ manyset $v2m($rv) kind times
+ set p [expr { double($times) * [set pm$kind] }]
+ debug 1 "epcl $s-$v $nvalues $prand: $rv $kind$times := $p"
+ lappend cl $rv $p
+ }
+ if {${total*org}} {
+ set cl [lreplace $cl end end]
+ } else {
+ lappend cl *
+ }
+}
+
+proc get/enum-def {s v min max prand} {
+ set nvalues [expr {$max-$min+1}]
+ upvar #0 "enum/choice-list/$s-${v}($nvalues $prand)" cl
+ if {![info exists cl]} { enum-prepare-choice-list $s $v $nvalues $prand }
+ set rv [eval choice-mult $cl]
+ if {"$rv" == "*"} { set rv [choice-int $min $max] }
return [get-enum-got $s $v $rv]
}
proc get/enum {s v min max prand} {
- get-for $s-$v
- get any choice $prand
+ set any [choice-prob $s-$v-any $prand]
if {$any} {
return [get/enum-rand $s $v $min $max]
} else {
- return [get/enum-def $s $v]
+ return [get/enum-def $s $v $min $max $prand]
}
}
return $rv
}
-proc get/rand {s v minlen maxlen} {
+proc get/rand {s v minlen maxlen blockbytes} {
get-for $s-$v
if {$maxlen<0} { getlog (full!); return {} }
- get l number $minlen $maxlen
- return [random-bytes $l]
+ get l number [expr {$minlen/$blockbytes}] [expr {$maxlen/$blockbytes}]
+ return [random-bytes [expr {$l*$blockbytes}]]
}
proc get/ip-timestamp {s v} {
- set rv [expr {[clock seconds] | 0x80000000}]
+ set rv 0xbc000000
+ incr rv [choice-int 100 10000]
getlog "$v=[format %x $rv]"
return $rv
}
return [packet-fromstring $o]
}
+proc get/ntstring {s v minlen maxlen first rest} {
+ set s [get/string $s $v $minlen $maxlen $first $rest]
+ append s 00
+ append s [random-bytes $maxlen]
+ return [string range $s 0 [expr {$maxlen*2-1}]]
+}
namespace eval Assembler {
namespace export assemble assembly-overwrite
}
namespace import Assembler::*
-proc gen_1_ip {mtu} {
+proc gen_1_ip {mtu source_spec dest_spec} {
# RFC791
upvar #0 ip_proto proto
upvar #0 ip_source source
upvar #0 ip_dest dest
+
+ set source $source_spec
+ set dest $dest_spec
+
get-for ip
set version 4
get tos hex 0x00 0xff
get frag number 0 0x1fff
}
get-config ttl 255 number 0 255
- get proto enum 1 255 0.05
- get-config source 127.0.0.1 v4addr
- get-config dest 127.0.0.1 v4addr
+ get proto enum 0 255 0.2
set flags [expr {$df*2 + $mf}]
set header_checksum 0
return $ip
}
-define ip-proto 1 icmp {mtu} {
+define ip-proto 1 *50 icmp {mtu} {
# RFC792
get-for icmp
get type enum 0 255 0.2
}
proc define-icmp-type-vanilla {num name} {
- define icmp-type $num $name {mbl} "icmp-vanilla \$mbl [list $name]"
+ define icmp-type $num * $name {mbl} "icmp-vanilla \$mbl [list $name]"
}
proc icmp-vanilla {mbl typename} {
get-for icmp-$typename
get code enum 0 255 0.4
- get body rand 0 $mbl
+ get body rand 0 $mbl 1
return [list $body $code]
}
define-icmp-type-vanilla 3 unreach
-define icmp-unreach-code 0 net {} {}
-define icmp-unreach-code 1 host {} {}
-define icmp-unreach-code 2 proto {} {}
-define icmp-unreach-code 3 port {} {}
-define icmp-unreach-code 4 fragneeded {} {}
-define icmp-unreach-code 5 sourceroutefail {} {}
+define icmp-unreach-code 0 * net {} {}
+define icmp-unreach-code 1 * host {} {}
+define icmp-unreach-code 2 * proto {} {}
+define icmp-unreach-code 3 * port {} {}
+define icmp-unreach-code 4 * fragneeded {} {}
+define icmp-unreach-code 5 * sourceroutefail {} {}
define-icmp-type-vanilla 11 timeout
-define icmp-timeout-code 0 intransit {} {}
-define icmp-timeout-code 1 fragment {} {}
+define icmp-timeout-code 0 * intransit {} {}
+define icmp-timeout-code 1 * fragment {} {}
define-icmp-type-vanilla 12 parameters
-define icmp-parameters-code 0 seepointer {} {}
+define icmp-parameters-code 0 * seepointer {} {}
define-icmp-type-vanilla 4 sourcequench
-define icmp-sourcequench-code 0 quench {} {}
+define icmp-sourcequench-code 0 * quench {} {}
-define icmp-type 5 redirect {mbl} {
+define icmp-type 5 * redirect {mbl} {
get-for icmp-redirect
get code enum 0 255 0.4
get gateway v4addr
- get data rand 0 [expr {$mbl-4}]
+ get data rand 0 [expr {$mbl-4}] 1
assemble body {
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Gateway |
return [list $body $code]
}
-define icmp-redirect-code 0 net {} {}
-define icmp-redirect-code 1 host {} {}
-define icmp-redirect-code 2 net+tos {} {}
-define icmp-redirect-code 3 host+tos {} {}
+define icmp-redirect-code 0 * net {} {}
+define icmp-redirect-code 1 * host {} {}
+define icmp-redirect-code 2 * net+tos {} {}
+define icmp-redirect-code 3 * host+tos {} {}
-define icmp-type 8 ping {mbl} { icmp-echo $mbl }
-define icmp-type 0 pong {mbl} { icmp-echo $mbl }
+define icmp-type 8 * ping {mbl} { icmp-echo $mbl }
+define icmp-type 0 * pong {mbl} { icmp-echo $mbl }
proc icmp-echo {mbl} {
get-for icmp-echo
get code enum 0 255 0.4
get id hex 0 0xffff
get seq hex 0 0xffff
- get data rand 0 [expr {$mbl-8}]
+ get data rand 0 [expr {$mbl-8}] 1
assemble body {
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Id | Seq |
}
return [list $body $code]
}
-define icmp-echo-code 0 echo {} {}
+define icmp-echo-code 0 * echo {} {}
-define icmp-type 13 timestamp {mbl} { icmp-timestamp }
-define icmp-type 14 timestampreply {mbl} { icmp-timestamp }
+define icmp-type 13 * timestamp {mbl} { icmp-timestamp }
+define icmp-type 14 * timestampreply {mbl} { icmp-timestamp }
proc icmp-timestamp {} {
get-for icmp-timestamp
get code enum 0 255 0.4
}
return [list $body $code]
}
-define icmp-timestamp-code 0 timestamp {} {}
+define icmp-timestamp-code 0 * timestamp {} {}
-define icmp-type 15 inforequest {mbl} { icmp-inforeq }
-define icmp-type 16 inforeply {mbl} { icmp-inforeq }
+define icmp-type 15 * inforequest {mbl} { icmp-inforeq }
+define icmp-type 16 * inforeply {mbl} { icmp-inforeq }
proc icmp-inforeq {} {
get-for icmp-inforeq
get code enum 0 255 0.4
}
return [list $body $code]
}
-define icmp-inforeq-code 0 timestamp {} {}
+define icmp-inforeq-code 0 * timestamp {} {}
# MAYADD ICMP traceroute RFC1393
# MAYADD ICMP router discovery RFC1256
-proc port-pair {scope} {
- get-for $scope
- get style choice-mult \
- request 0.24 \
- reply 0.24 \
- random 0.16 \
- servers
+define ip-proto 4 * ip {mtu} {
+ # RFC2003
+ get-for ip-ip
+ get source v4addr
+ get dest v4addr
+ gen_1_ip $mtu $source $dest
+}
- if {"$style" != "random"} {
- get port enum-def
- set def_port $port
- } else {
- set def_port x
+
+define ip-proto 2 ? igmp {mtu} {
+ get-for igmp
+ get type enum 0 255 0.5
+ get timeout number 0 255
+ get group v4addr
+ set checksum 0
+ set extra {}
+ assemble igmp {
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Type | Timeout | ? Checksum |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Group |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | ? Extra ... |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
}
- if {"$style" != "servers"} {
- get port enum-rand 0 0xffff
- set rand_port $port
+
+ if {[choice-prob igmp-extra 0.3]} {
+ get extra rand 1 [expr {$mtu - [packet-len $igmp]}] 1
+ assembly-overwrite igmp extra $extra
}
- 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 }
+
+ assembly-overwrite igmp checksum [packet-csum-ip $igmp]
+ return $igmp
+}
+
+define igmp-type 17 * membquery {} {}
+define igmp-type 16 * membreport {} {}
+define igmp-type 23 * leavegroup {} {}
+define igmp-type 18 * membreport {} {}
+
+
+define ip-proto 51 ? ah {mtu} {
+ # RFC1826
+ get-for ah
+ get next number 0 255
+ get reserved hex 0 0xffff
+ get spi hex32
+ get auth_data rand 0 [expr {$mtu-8 > 50 ? 50 : $mtu-8}] 4
+ set length [packet-len $auth_data]
+ assemble ah {
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Next | Length | RESERVED |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | SPI |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Auth Data ... |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
}
- return [list $source_port $dest_port $def_port $style]
+ get payload rand 0 [expr {$mtu - [packet-len $ah]}] 1
+ append ah $payload
+ return $ah
}
-define ip-proto 17 udp {mtu} {
+proc udp-rport {} {
get-for udp
+ get port enum-rand 0 0xffff
+ return $port
+}
- get checksum choice-mult \
+define ip-proto 17 * udp {mtu} {
+ # RFC768
+ get-for udp
+
+ set csum_mode [choice-mult \
checksum_bad 0.10 \
checksum_none 0.20 \
- checksum_good
- manyset [port-pair udp] source_port dest_port def_port style
+ checksum_good]
+
+ set prand 0.50
+ get style choice-mult \
+ random $prand \
+ request 0.15 \
+ reply 0.15 \
+ servers
+
+ if {"$style" != "random"} {
+ get port enum-def 0 255 $prand
+ set def_port $port
+ } else {
+ set def_port x
+ }
+ switch -exact $style {
+ 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"} {
set port $def_port
set data [depending-on udp port $mtu -8 $style]
} else {
- get data rand 0 [expr {$mtu-8}]
+ get data rand 0 [expr {$mtu-8}] 1
}
set length 0
set udp_length [packet-len $udp]
assembly-overwrite udp length $udp_length
- if {"$checksum" != "none"} {
+ if {"$csum_mode" == "checksum_none"} {
+ set checksum 0
+ getlog (nocsum)
+ } else {
global ip_source ip_dest ip_proto
assemble pseudo {
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| 0 | IP Proto | UDP length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
}
- set csum [packet-csum-ip "$pseudo$udp"]
- if {!$csum} { set csum 0xffff }
- if {"$checksum" == "bad"} {
+ set checksum [packet-csum-ip "$pseudo$udp"]
+ if {!$checksum} { set checksum 0xffff }
+ if {"$csum_mode" == "checksum_bad"} {
get csumerror hex 1 0xffff
- set csum [expr {$csum ^ $csumerror}]
+ set checksum [expr {$checksum ^ $csumerror}]
}
- } else {
- set csum 0
}
- assembly-overwrite udp checksum $csum
+ assembly-overwrite udp checksum $checksum
return $udp
}
-define udp-port 50 remailck {mtu style} {
+define udp-port 50 ?200 remailck {mtu style} {
+ # RFC1339
get-for remailck
if {"$style" == "request"} {
get what choice-mult \
}
req-baduser {
set auth 0
- get user rand 0 [expr {$mtu - 4}]
+ get user rand 0 [expr {$mtu - 4}] 1
}
req-auth {
get auth enum 0 31 0.5
return $payload
}
-define remailck-auth 31 passwd {mtu} {
+define remailck-auth 31 * passwd {mtu} {
get-for remailck-passwd
get passwd string 6 8 \
0123456789abcdefghijklmnopqrstuvxwyz \
return $passwd
}
-define ip-proto 6 tcp {mtu} {
+define udp-port 67 ? dhcpserv {mtu style} { return [dhcp $mtu] }
+define udp-port 68 ? dhcpclient {mtu style} { return [dhcp $mtu] }
+proc dhcp {mtu} {
+ get-for dhcp
+ get op enum 0 255 0.2
+ get htype enum 0 255 0.2
+ set hlen 6
+ get hops number 0 255
+ get xid hex32
+ get secs number 0 300
+ get flags hex 0 255
+ get ciaddr v4addr
+ get yiaddr v4addr
+ get siaddr v4addr
+ get giaddr v4addr
+ set chaddr [random-bytes 16]
+ get sname ntstring 0 64 \
+ 0123456789abcdefghijklmnopqrstuvwxyz \
+ 0123456789abcdefghijklmnopqrstuvwxyz.-+
+ get file ntstring 0 128 / \
+ 0123456789abcdefghijklmnopqrstuvwxyz.-+/_
+
+ assemble dhcp {
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | op | htype | hlen | hops |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | xid |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | secs | flags |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | ciaddr |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | yiaddr |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | siaddr |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | giaddr |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ }
+ append dhcp $chaddr $sname $file
+
+ return $dhcp
+}
+define dhcp-op 1 * request {} {}
+define dhcp-op 2 * reply {} {}
+define dhcp-htype 1 * ethernet {} {}
+
+
+define ip-proto 6 * tcp {mtu} {
+ # RFC793
get-for tcp
get source_port number 0 65535
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 $optmode {
noopt { }
badopt {
- get options rand 1 60
+ get options rand 1 60 1
}
opt {
- while {[choice-prob tcp-opts-more 0.4]} {
+ set nooi 1
+ while {$nooi || [choice-prob tcp-opts-more 0.4]} {
+ set nooi 0
get opt enum 1 255 0.5
if {$opt == 1} {
assemble option {
assembly-overwrite packet d_off $d_off
if {!($s || $r) || [get unexpdata flag 0.2]} {
- get data rand 0 [expr {$mtu - [packet-len $packet]}]
+ get data rand 0 [expr {$mtu - [packet-len $packet]}] 1
append packet $data
}
set tcp_length [packet-len $packet]
return $packet
}
-define tcp-opt 2 mss {mdl} {
+define tcp-opt 2 * mss {mdl} {
get-for tcp-opt
get mss hex 0 0xffff
assemble od {
}
namespace import PCap::*
-proc emit {count} {
- global getlog_log errorInfo mtu
+proc emit {seed} {
+ global getlog_log errorInfo mtu fake_time_t
+ global minframelen linktypename errors_continue
+
+ get-for ip
+ get-config source 127.0.0.1 v4addr
+ get-config dest 127.0.0.1 v4addr
+
if {[catch {
- start_gen $count
- set packet [gen_1_ip $mtu]
- puts stdout "[format %6d $count] $getlog_log\n $packet"
+ start_gen $seed
+ set packet [gen_1_ip $mtu $source $dest]
+ puts stdout "[format %6s $seed] $getlog_log\n $packet"
} emsg]} {
- puts stderr "\nERROR\n$count\n\n$emsg\n\n$errorInfo\n\n"
- puts stdout "[format %06d $count] error"
+ puts stderr "\nERROR\n$seed\n\n$emsg\n\n$errorInfo\n\n"
+ puts stdout "[format %6s $seed] error"
+ if {!$errors_continue} {
+ error "internal error generating packet - consult author"
+ }
} else {
- set ts_sec [clock seconds]
+ set ts_sec [incr fake_time_t]
set ts_usec 0
- set llpkt [random-bytes 12] ;# ether addrs
- append llpkt 0800 ;# eth ip type
- append llpkt $packet
+ set l [packet-len $packet]
+ if {$l < $minframelen} {
+ append packet [string repeat 00 [expr {$minframelen - $l}]]
+ }
+
+ set llpkt [link/$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 errors_continue 0
+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] }
+ --errors-continue { set errors_continue 1 }
+ --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 thiszone 0
set sigfigs 0
set snaplen 131073
-set linktype 1
pcap_write {
x32 magic
s32 linktype
}
-if {[llength $argv] && ![string length $upto]} {
+set fake_time_t 1000000000
+
+start_gen TEST
+random-bytes 100
+
+if {[llength $argv]} {
foreach count $argv { emit "$xseed$count" }
-} elseif {![llength $argv]} {
+} else {
if {![string length $upto]} { set upto 100 }
for {set count 1} {$upto<0 || $count<=$upto} {incr count} {
emit "$xseed$count"
}
-} else {
- error "bad mode"
}
pcap_close
~ianmdlvl / vinegar-ip.git / blobdiff