81 lines
2.4 KiB
Plaintext
81 lines
2.4 KiB
Plaintext
|
#!/usr/bin/perl
|
||
|
|
# (C)2002 by IBM Corporation, published under terms of the GPL V2
|
||
|
|
# Author: Holger Smolinski <smolinsk@de.ibm.com>
|
||
|
|
# this file is a wrapper around tcpdump, which provides the capability
|
||
|
|
# for debugging qeth and/or HiperSocket(TM) network interfaces under
|
||
|
|
# Linux for S/390 and zSeries. tcpdump Syntax is preserved.
|
||
|
|
# Bugs: When the input pipe ends the process is not stopped.
|
||
|
|
|
||
|
|
use Getopt::Std;
|
||
|
|
|
||
|
|
my $incmd,$outcmd;
|
||
|
|
|
||
|
|
getopts ("adeflnNOpqRStuvxXc:C:F:i:m:r:s:T:w:E:",\%options);
|
||
|
|
|
||
|
|
# Check which options to replace for the reader process
|
||
|
|
if ( defined($options{'r'}) ) {
|
||
|
|
$incmd = "cat $options{'r'}";
|
||
|
|
$filter_out = 1;
|
||
|
|
} else {
|
||
|
|
$incmd = "tcpdump -l -w -";
|
||
|
|
$filter_out = 0;
|
||
|
|
if ( defined($options{'i'}) ) {
|
||
|
|
$incmd .= " -i ".$options{'i'};
|
||
|
|
delete $options{'i'}; # remove -i option from option list
|
||
|
|
}
|
||
|
|
foreach $key (@ARGV) {
|
||
|
|
$incmd .= " $key";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$outcmd = "tcpdump -r -";
|
||
|
|
# Rebuild arglist for the writer process
|
||
|
|
delete $options{'r'}; # remove -r option from option list
|
||
|
|
foreach $key (keys %options) {
|
||
|
|
if ((index "adeflnNOpqRStuvxX",$key) >= 0 ) {
|
||
|
|
$outcmd .= " -$key";
|
||
|
|
} else {
|
||
|
|
$outcmd .= " -$key $options{$key}";
|
||
|
|
}
|
||
|
|
if ( $filter_out == 1 ) {
|
||
|
|
foreach $key (@ARGV) {
|
||
|
|
$outcmd .= " $key";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
open READER,"$incmd|" or die "Cannot spawn reader command $incmd";
|
||
|
|
open WRITER,"|$outcmd" or die "Cannot spawn writer command $outcmd";
|
||
|
|
|
||
|
|
sysread READER,$filehdr,24 or die "Cannot read file header";
|
||
|
|
($magic,$version_major,$version_minor,$thiszone,$sigfigs,$snaplen,$linktype) =
|
||
|
|
unpack("ISSIIII",$filehdr);
|
||
|
|
$snaplen += 14;
|
||
|
|
$filehdr = pack ("ISSIIII",($magic,$version_major,$version_minor,$thiszone,$sigfigs,$snaplen,$linktype));
|
||
|
|
syswrite WRITER,$filehdr,24;
|
||
|
|
|
||
|
|
$etherheaderip6 = pack ("IIIS",(0,0,0,0x8dd));
|
||
|
|
$etherheaderip4 = pack ("IIIS",(0,0,0,0x800));
|
||
|
|
|
||
|
|
while ( 1 ) {
|
||
|
|
$hdrd = 0;
|
||
|
|
do {$hdrd += sysread READER, $pkthdr, 16-$hdrd, $hdrd; } while ($hdrd < 16);
|
||
|
|
($seconds,$usecs,$caplen,$len) = unpack ("IIII",$pkthdr);
|
||
|
|
$hdrd = 0;
|
||
|
|
do {$hdrd += sysread READER, $packet,$caplen-$hdrd, $hdrd; } while ($hdrd < $caplen);
|
||
|
|
$paktype = unpack("C",$packet);
|
||
|
|
if ( $paktype & 0xf0 == 0x60 ) {
|
||
|
|
$caplen += 14;
|
||
|
|
$len += 14;
|
||
|
|
$header = $etehrheaderip6;
|
||
|
|
} elsif ($paktype >= 0x45 && $paktype <= 0x4f ) {
|
||
|
|
$caplen += 14;
|
||
|
|
$len += 14;
|
||
|
|
$header = $etherheaderip4;
|
||
|
|
} else {
|
||
|
|
$header = "";
|
||
|
|
}
|
||
|
|
$pkthdr = pack ("IIII",($seconds,$usecs,$caplen,$len));
|
||
|
|
syswrite WRITER,"$pkthdr$header$packet",16+$caplen;
|
||
|
|
}
|