Re: Netgraph - ng_bpf help (first experience)
On Wed, Oct 11, 2006 at 12:12:06PM -0300, Eduardo Meyer wrote:
ngctl: send msg: No such file or directory
Exit 71
Same problem. With ngctl list the only node I see is:
There are 1 total nodes:
Name: ngctl19792 Type: socket ID: 003f Num hooks: 0
You do not have ng_bpf node created and try to assing a program
to nonexisting node. That's what ngctl tries to say to you.
Eugene
Thank you for pointing a way Eugene. But isn't this command supposed
to be the one creating the node?
No.
ngctl msg my_node: setprogram { thisHook=hook1 ifMatch=hook2
ifNotMatch=hook3 bpf_prog_len=16 bpf_prog=[ { code=40 jt=0 jf=0 k=12
} { code=21 jt=0 jf=4 k=34525 } { code=48 jt=0 jf=0 k=20 } { code=21
jt=0 jf=11 k=6 } { code=40 jt=0 jf=0 k=56 } { code=21 jt=8 jf=9 k=80 }
{ code=21 jt=0 jf=8 k=2048 } { code=48 jt=0 jf=0 k=23 } { code=21 jt=0
jf=6 k=6 } { code=40 jt=0 jf=0 k=20 } { code=69 jt=4 jf=0 k=8191 } {
code=177 jt=0 jf=0 k=14 } { code=72 jt=0 jf=0 k=16 } { code=21 jt=0
jf=1 k=80 } { code=6 jt=0 jf=0 k=8192 } { code=6 jt=0 jf=0 k=0 } ] } }
How should I create my_node before?
Absolutely.
Eugene Grosbein
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Re: Netgraph - ng_bpf help (first experience)
ngctl msg my_node: setprogram { thisHook=hook1 ifMatch=hook2
ifNotMatch=hook3 bpf_prog_len=16 bpf_prog=[ { code=40 jt=0 jf=0 k=12
} { code=21 jt=0 jf=4 k=34525 } { code=48 jt=0 jf=0 k=20 } { code=21
jt=0 jf=11 k=6 } { code=40 jt=0 jf=0 k=56 } { code=21 jt=8 jf=9 k=80 }
{ code=21 jt=0 jf=8 k=2048 } { code=48 jt=0 jf=0 k=23 } { code=21 jt=0
jf=6 k=6 } { code=40 jt=0 jf=0 k=20 } { code=69 jt=4 jf=0 k=8191 } {
code=177 jt=0 jf=0 k=14 } { code=72 jt=0 jf=0 k=16 } { code=21 jt=0
jf=1 k=80 } { code=6 jt=0 jf=0 k=8192 } { code=6 jt=0 jf=0 k=0 } ] } }
How should I create my_node before?
Absolutely.
Absolutely what? I meant how should I create, say how to create my
node. The man page does not mentions anything about it.
Thanks again for the help.
--
===
Eduardo Meyer
pessoal: [EMAIL PROTECTED]
profissional: [EMAIL PROTECTED]
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Re: Netgraph - ng_bpf help (first experience)
is there a need in ng_ether module?
On 10/11/06, Eduardo Meyer [EMAIL PROTECTED] wrote:
ngctl msg my_node: setprogram { thisHook=hook1 ifMatch=hook2
ifNotMatch=hook3 bpf_prog_len=16 bpf_prog=[ { code=40 jt=0 jf=0 k=12
} { code=21 jt=0 jf=4 k=34525 } { code=48 jt=0 jf=0 k=20 } { code=21
jt=0 jf=11 k=6 } { code=40 jt=0 jf=0 k=56 } { code=21 jt=8 jf=9 k=80 }
{ code=21 jt=0 jf=8 k=2048 } { code=48 jt=0 jf=0 k=23 } { code=21 jt=0
jf=6 k=6 } { code=40 jt=0 jf=0 k=20 } { code=69 jt=4 jf=0 k=8191 } {
code=177 jt=0 jf=0 k=14 } { code=72 jt=0 jf=0 k=16 } { code=21 jt=0
jf=1 k=80 } { code=6 jt=0 jf=0 k=8192 } { code=6 jt=0 jf=0 k=0 } ] } }
How should I create my_node before?
Absolutely.
Absolutely what? I meant how should I create, say how to create my
node. The man page does not mentions anything about it.
Thanks again for the help.
--
===
Eduardo Meyer
pessoal: [EMAIL PROTECTED]
profissional: [EMAIL PROTECTED]
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Re: Netgraph - ng_bpf help (first experience)
On Wed, Oct 11, 2006 at 01:02:50PM -0300, Eduardo Meyer wrote:
ngctl msg my_node: setprogram { thisHook=hook1 ifMatch=hook2
ifNotMatch=hook3 bpf_prog_len=16 bpf_prog=[ { code=40 jt=0 jf=0 k=12
} { code=21 jt=0 jf=4 k=34525 } { code=48 jt=0 jf=0 k=20 } { code=21
jt=0 jf=11 k=6 } { code=40 jt=0 jf=0 k=56 } { code=21 jt=8 jf=9 k=80 }
{ code=21 jt=0 jf=8 k=2048 } { code=48 jt=0 jf=0 k=23 } { code=21 jt=0
jf=6 k=6 } { code=40 jt=0 jf=0 k=20 } { code=69 jt=4 jf=0 k=8191 } {
code=177 jt=0 jf=0 k=14 } { code=72 jt=0 jf=0 k=16 } { code=21 jt=0
jf=1 k=80 } { code=6 jt=0 jf=0 k=8192 } { code=6 jt=0 jf=0 k=0 } ] } }
How should I create my_node before?
Absolutely.
Absolutely what? I meant how should I create, say how to create my
node. The man page does not mentions anything about it.
Sorry, I've misread your question.
Take a look at /usr/ports/net-mgmt/ng_ipacct/files/ng_ipacct.conf.
There is a working example of NETGRAPH web using ng_bpf and a set of commands
that builds it. Search for 'EXAMPLE 4' there and 'ng_ipacct_bpf_ether_start'
above the example.
You may read some generic documentation about netgraph also,
it does not hurt :-)
Eugene Grosbein
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Netgraph - ng_bpf help (first experience)
Hello,
I tried asking it on freebsd-ipfw@ but I got no luck. Maybe because
this is related to Netgraph and not ipfw essentially.
I want to use ng_bpf to use ng_tag to use ipfw-tag. Looks like lego,
where I have to assemble my toy, but I liked Lego when I was a child.
Following ng_bpf(4) man page I ran this script:
PATTERN=(ether[40:4]=0x134e5844
ether[44:4]=0x6f6d6169
ether[48:4]=0x6e0a)
NODEPATH=my_node:
INHOOK=hook1
MATCHHOOK=hook2
NOTMATCHHOOK=hook3
cat /tmp/bpf.awk xxENDxx
{
if (!init) {
printf bpf_prog_len=%d bpf_prog=[, \$1;
init=1;
} else {
printf { code=%d jt=%d jf=%d k=%d }, \$1, \$2, \$3, \$4;
}
}
END {
print ]
}
xxENDxx
BPFPROG=`tcpdump -s 8192 -ddd ${PATTERN} | awk -f /tmp/bpf.awk`
ngctl msg ${NODEPATH} setprogram { thisHook=\${INHOOK}\ \
ifMatch=\${MATCHHOOK}\ \
ifNotMatch=\${NOTMATCHHOOK}\ \
${BPFPROG} } }
But I got this message:
ngctl: send msg: No such file or directory
I printed the full commands that returns the error, it is:
ngctl msg setprogram { thisHook= ifMatch= ifNotMatch=
bpf_prog_len=8 bpf_prog=[ { code=32 jt=0 jf=0 k=40 } { code=21 jt=0
jf=5 k=323901508 } { code=32 jt=0 jf=0 k=44 } { code=21 jt=0 jf=3
k=1869439337 } { code=32 jt=0 jf=0 k=48 } { code=21 jt=0 jf=1 k=28170
} { code=6 jt=0 jf=0 k=8192 } { code=6 jt=0 jf=0 k=0 } ] } }
Running tcpdump -s 8192 -ddd $PATTERN manually I get:
8
32 0 0 40
21 0 5 323901508
32 0 0 44
21 0 3 1869439337
32 0 0 48
21 0 1 28170
6 0 0 8192
6 0 0 0
Which looks that the ngctl data (code, kt, jf and k) are correct. But
the command returns that error for some reason. The script was taken
from ng_blf(4) man page.
I am all new to this netgraph thing.
Can anyone help me to find out what is rong? Thank you.
--
===
Eduardo Meyer
pessoal: [EMAIL PROTECTED]
profissional: [EMAIL PROTECTED]
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Re: Netgraph - ng_bpf help (first experience)
On 10/10/06, Eduardo Meyer [EMAIL PROTECTED] wrote:
Hello,
I tried asking it on freebsd-ipfw@ but I got no luck. Maybe because
this is related to Netgraph and not ipfw essentially.
I want to use ng_bpf to use ng_tag to use ipfw-tag. Looks like lego,
where I have to assemble my toy, but I liked Lego when I was a child.
Following ng_bpf(4) man page I ran this script:
PATTERN=(ether[40:4]=0x134e5844
ether[44:4]=0x6f6d6169
ether[48:4]=0x6e0a)
NODEPATH=my_node:
INHOOK=hook1
MATCHHOOK=hook2
NOTMATCHHOOK=hook3
cat /tmp/bpf.awk xxENDxx
{
if (!init) {
printf bpf_prog_len=%d bpf_prog=[, \$1;
init=1;
} else {
printf { code=%d jt=%d jf=%d k=%d }, \$1, \$2, \$3, \$4;
}
}
END {
print ]
}
xxENDxx
BPFPROG=`tcpdump -s 8192 -ddd ${PATTERN} | awk -f /tmp/bpf.awk`
ngctl msg ${NODEPATH} setprogram { thisHook=\${INHOOK}\ \
ifMatch=\${MATCHHOOK}\ \
ifNotMatch=\${NOTMATCHHOOK}\ \
${BPFPROG} } }
But I got this message:
ngctl: send msg: No such file or directory
are you sure you are able to write to /tmp, this error looks like it
is not able to read /tmp/bpf.awk.
I printed the full commands that returns the error, it is:
ngctl msg setprogram { thisHook= ifMatch= ifNotMatch=
bpf_prog_len=8 bpf_prog=[ { code=32 jt=0 jf=0 k=40 } { code=21 jt=0
jf=5 k=323901508 } { code=32 jt=0 jf=0 k=44 } { code=21 jt=0 jf=3
k=1869439337 } { code=32 jt=0 jf=0 k=48 } { code=21 jt=0 jf=1 k=28170
} { code=6 jt=0 jf=0 k=8192 } { code=6 jt=0 jf=0 k=0 } ] } }
i suspect this is what the contents of /tmp/bpf.awk are. if not maybe
post that to the thread
-pete
--
~~o0OO0o~~
Pete Wright
www.nycbug.org
NYC's *BSD User Group
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Re: Netgraph - ng_bpf help (first experience)
New try, now by hand:
# ngctl msg dcbpf: setprogram { thisHook=ipfw ifMatch=matched
ifNotMatch=ipfw bpf_prog_len=8 bpf_prog=[ { code=32 jt=0 jf=0 k=40 }
{ code=21 jt=0 jf=5 k=323901508 } { code=32 jt=0 jf=0 k=44 } { code=21
jt=0 jf=3 k=1869439337 } { code=32 jt=0 jf=0 k=48 } { code=21 jt=0
jf=1 k=28170 } { code=6 jt=0 jf=0 k=8192 } { code=6 jt=0 jf=0 k=0 } ]
} }
ngctl: send msg: No such file or directory
I cant figure out which file or directory was not found :(
Now exactly with the command originated from the man page - ng_bpf(4):
ngctl msg my_node: setprogram { thisHook=hook1 ifMatch=hook2
ifNotMatch=hook3 bpf_prog_len=16 bpf_prog=[ { code=40 jt=0 jf=0 k=12
} { code=21 jt=0 jf=4 k=34525 } { code=48 jt=0 jf=0 k=20 } { code=21
jt=0 jf=11 k=6 } { code=40 jt=0 jf=0 k=56 } { code=21 jt=8 jf=9 k=80 }
{ code=21 jt=0 jf=8 k=2048 } { code=48 jt=0 jf=0 k=23 } { code=21 jt=0
jf=6 k=6 } { code=40 jt=0 jf=0 k=20 } { code=69 jt=4 jf=0 k=8191 } {
code=177 jt=0 jf=0 k=14 } { code=72 jt=0 jf=0 k=16 } { code=21 jt=0
jf=1 k=80 } { code=6 jt=0 jf=0 k=8192 } { code=6 jt=0 jf=0 k=0 } ] } }
ngctl: send msg: No such file or directory
Exit 71
Same problem. With ngctl list the only node I see is:
There are 1 total nodes:
Name: ngctl19792 Type: socket ID: 003f Num hooks: 0
My kldstat:
Id Refs AddressSize Name
1 10 0xc040 40e440 kernel
22 0xc080f000 22ae8sound.ko
31 0xc0832000 51f8 snd_t4dwave.ko
41 0xc0838000 59e60acpi.ko
51 0xc24e6000 1a000usb.ko
61 0xc3754000 4000 ng_bpf.ko
73 0xc3758000 a000 netgraph.ko
81 0xc3766000 3000 ng_tag.ko
91 0xc3769000 4000 ng_socket.ko
What am I missing here, and why the example from the man page wont work?
On 10/10/06, Eduardo Meyer [EMAIL PROTECTED] wrote:
Pete, thank you for asking.
are you sure you are able to write to /tmp, this error looks like it
is not able to read /tmp/bpf.awk.
Yes, I can write. It is not the problem, since the generated code from
the awk file is OK.
I printed the full commands that returns the error, it is:
ngctl msg setprogram { thisHook= ifMatch= ifNotMatch=
bpf_prog_len=8 bpf_prog=[ { code=32 jt=0 jf=0 k=40 } { code=21 jt=0
jf=5 k=323901508 } { code=32 jt=0 jf=0 k=44 } { code=21 jt=0 jf=3
k=1869439337 } { code=32 jt=0 jf=0 k=48 } { code=21 jt=0 jf=1 k=28170
} { code=6 jt=0 jf=0 k=8192 } { code=6 jt=0 jf=0 k=0 } ] } }
i suspect this is what the contents of /tmp/bpf.awk are. if not maybe
post that to the thread
No, this is the out from
echo ngctl msg ${NODEPATH} setprogram { thisHook=\${INHOOK}\
ifMatch=\${MATCHHOOK}\ ifNotMatch=\${NOTMATCHHOOK}\ ${BPFPROG} } }
I added the echo command to see how it is getting executed. So I have
the echo and on the next line the command itself. Note that this was
just copied/pasted from the man page, with the exception of the
PATTERN.
--
===
Eduardo Meyer
pessoal: [EMAIL PROTECTED]
profissional: [EMAIL PROTECTED]
--
===
Eduardo Meyer
pessoal: [EMAIL PROTECTED]
profissional: [EMAIL PROTECTED]
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Re: Netgraph - ng_bpf help (first experience)
Pete, thank you for asking.
are you sure you are able to write to /tmp, this error looks like it
is not able to read /tmp/bpf.awk.
Yes, I can write. It is not the problem, since the generated code from
the awk file is OK.
I printed the full commands that returns the error, it is:
ngctl msg setprogram { thisHook= ifMatch= ifNotMatch=
bpf_prog_len=8 bpf_prog=[ { code=32 jt=0 jf=0 k=40 } { code=21 jt=0
jf=5 k=323901508 } { code=32 jt=0 jf=0 k=44 } { code=21 jt=0 jf=3
k=1869439337 } { code=32 jt=0 jf=0 k=48 } { code=21 jt=0 jf=1 k=28170
} { code=6 jt=0 jf=0 k=8192 } { code=6 jt=0 jf=0 k=0 } ] } }
i suspect this is what the contents of /tmp/bpf.awk are. if not maybe
post that to the thread
No, this is the out from
echo ngctl msg ${NODEPATH} setprogram { thisHook=\${INHOOK}\
ifMatch=\${MATCHHOOK}\ ifNotMatch=\${NOTMATCHHOOK}\ ${BPFPROG} } }
I added the echo command to see how it is getting executed. So I have
the echo and on the next line the command itself. Note that this was
just copied/pasted from the man page, with the exception of the
PATTERN.
--
===
Eduardo Meyer
pessoal: [EMAIL PROTECTED]
profissional: [EMAIL PROTECTED]
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