12-25-2011
Hello again and merry Xmass to all, thankx again Franklin52 for your fix
After experimenting with tcp test tool and tcpflow i discovered that tcpflow -C ( print to console ) implies -s witch convert unprintable characters to "." witch i don't want, i patched tcpflow to have -B (send output to stdout) hxxps://launchpadlibrarian.net/11992351/20_stdout-dump.diff now tcpflow -B send the data as it is. (tested with tcp test tool)
I have another problem with pipes after i convert to HEX using xxd -p it seems i cannot pipes the output to anything awk, sed ,netcat nothing works
Quote:
patx@Patx:~$ sudo tcpflow -i eth1 -B dst port 20033 | xxd -p | sed 's/../&\\\\x/g'
tcpflow[4726]: listening on eth1
^Ctcpflow[4726]: terminating
Quote:
patx@Patx:~$ sudo tcpflow -i eth1 -B dst port 20033 | xxd -p
tcpflow[4730]: listening on eth1
00a900000056008f80008f078d40f82d00d8d35a0dc994b47b80e41f785f
aeaf3644b47f273580651896ceaba8e0866eda6f15483d72867026e39be8
f4b9cee540de4e525bae440230068d4d1c1e93a7fb808ac315f36b465375
05e862efd1d71281057e7e746716451ea4bdd66499298442d5555bb39726
757ac56f9b19aca3740e88334f9ca96ebb1852b376c862b344ff949e0cc1
^Ctcpflow[4730]: terminating
Quote:
patx@Patx:~$ sudo tcpflow -i eth1 -B dst port 20033 | xxd -p | awk '{printf "\\\\x" $1}END{print ""}'
tcpflow[4733]: listening on eth1
^Ctcpflow[4733]: terminating
Is there a way to fix this or is there better way to convert tcpflow stdout binary code and send as hex on a tcp port... C code, perl, python... anything that works on ubuntu 10.04
Thank you
Last edited by patx; 12-25-2011 at 05:25 PM..
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LEARN ABOUT REDHAT
tc-matchall
Match-all classifier in tc(8) Linux Match-all classifier in tc(8)
NAME
matchall - traffic control filter that matches every packet
SYNOPSIS
tc filter ... matchall [ skip_sw | skip_hw ] [ action ACTION_SPEC ] [ classid CLASSID ]
DESCRIPTION
The matchall filter allows to classify every packet that flows on the port and run a action on it.
OPTIONS
action ACTION_SPEC
Apply an action from the generic actions framework on matching packets.
classid CLASSID
Push matching packets into the class identified by CLASSID.
skip_sw
Do not process filter by software. If hardware has no offload support for this filter, or TC offload is not enabled for the inter-
face, operation will fail.
skip_hw
Do not process filter by hardware.
EXAMPLES
To create ingress mirroring from port eth1 to port eth2:
tc qdisc add dev eth1 handle ffff: ingress
tc filter add dev eth1 parent ffff:
matchall skip_sw
action mirred egress mirror
dev eth2
The first command creats an ingress qdisc with handle ffff: on device eth1 where the second command attaches a matchall filters on it that
mirrors the packets to device eth2.
To create egress mirroring from port eth1 to port eth2:
tc qdisc add dev eth1 handle 1: root prio
tc filter add dev eth1 parent 1:
matchall skip_sw
action mirred egress mirror
dev eth2
The first command creats an egress qdisc with handle 1: that replaces the root qdisc on device eth1 where the second command attaches a
matchall filters on it that mirrors the packets to device eth2.
To sample one of every 100 packets flowing into interface eth0 to psample group 12:
tc qdisc add dev eth0 handle ffff: ingress
tc filter add dev eth0 parent ffff: matchall
action sample rate 100 group 12
SEE ALSO
tc(8),
iproute2 21 Oct 2015 Match-all classifier in tc(8)