sniffing on a packet radio device

sniffing on a packet radio device

[Folkert van Heusden]

Hi,

I have a BayCom modem connected to com1. I've also loaded the module.
As a test I assigned an ip-address to it and pinged some random ip-
address. The transceiver (is that the word?) seems to transmit what
I'm sending. Also, sometimes I see the RX light of the modem blinking
so someone must be transmitting something. So I tried tcpdump on the
device (bcsh0) but that failed with a "unknown data link type 3".
So I was wondering: is there anything out there with which I can
sniff *everything* that is coming through?


Thank you.

Folkert van Heusden
www.vanheusden.com

Re: sniffing on a packet radio device

[Richard Adams]

On Tue, 2003-02-11 at 22:22, Folkert van Heusden wrote:
> Hi,
> 
> I have a BayCom modem connected to com1. I've also loaded the module.
> As a test I assigned an ip-address to it and pinged some random ip-
> address. The transceiver (is that the word?) seems to transmit what
> I'm sending. Also, sometimes I see the RX light of the modem blinking
> so someone must be transmitting something. So I tried tcpdump on the
> device (bcsh0) but that failed with a "unknown data link type 3".
> So I was wondering: is there anything out there with which I can
> sniff *everything* that is coming through?
> 
> 
> Thank you.

listen -p bcsh0 -a

--
Regards Richard
pa3gcu@zeelandnet.nl
http://people.zeelandnet.nl/pa3gcu

Re: sniffing on a packet radio device

[Ben Stienstra]

try /usr/bin/listen -r

regards,
PD2BS, Ben 

On Tue, 2003-02-11 at 22:22, Folkert van Heusden wrote:
> Hi,
> 
> I have a BayCom modem connected to com1. I've also loaded the module.
> As a test I assigned an ip-address to it and pinged some random ip-
> address. The transceiver (is that the word?) seems to transmit what
> I'm sending. Also, sometimes I see the RX light of the modem blinking
> so someone must be transmitting something. So I tried tcpdump on the
> device (bcsh0) but that failed with a "unknown data link type 3".
> So I was wondering: is there anything out there with which I can
> sniff *everything* that is coming through?
> 
> 
> Thank you.
> 
> Folkert van Heusden
> www.vanheusden.com
> -
> To unsubscribe from this list: send the line "unsubscribe linux-hams" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: sniffing on a packet radio device

[Luc Langehegermann]

On Tuesday 11 February 2003 22:22, Folkert van Heusden wrote:
> Hi,
>
> I have a BayCom modem connected to com1. I've also loaded the module.
> As a test I assigned an ip-address to it and pinged some random ip-
> address. The transceiver (is that the word?) seems to transmit what
> I'm sending. Also, sometimes I see the RX light of the modem blinking
> so someone must be transmitting something. So I tried tcpdump on the
> device (bcsh0) but that failed with a "unknown data link type 3".
> So I was wondering: is there anything out there with which I can
> sniff *everything* that is coming through?
>

Try 'listen -ac -p <port>'

Luc


>
> Thank you.
>
> Folkert van Heusden
> www.vanheusden.com
> -
> To unsubscribe from this list: send the line "unsubscribe linux-hams" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: sniffing on a packet radio device

[Shane Deering]

On Wed, 12 Feb 2003 08:22, Folkert van Heusden wrote:
> Hi,
>
> I have a BayCom modem connected to com1. I've also loaded the module.
> As a test I assigned an ip-address to it and pinged some random ip-
> address. The transceiver (is that the word?) seems to transmit what
> I'm sending. Also, sometimes I see the RX light of the modem blinking
> so someone must be transmitting something. So I tried tcpdump on the
> device (bcsh0) but that failed with a "unknown data link type 3".
> So I was wondering: is there anything out there with which I can
> sniff *everything* that is coming through?

Try /usr/bin/listen.
I like to use "listen -car".
And get a license.

-- 
Shane Deering                   Sent using Kmail v1.4.3
vk3bvp@qsl.net                  on Mandrake Linux, the Desktop OS
vk3bvp@vk3bvp.#sev.vic.aus.oc   MDK9.0 Up 1 hour and 5 minutes 
http://www.qsl.net/vk3bvp/      RH7.2 Up 18 hours and 8 minutes 

soundmodem, serial port, parallel port?

[Vivi Kusumo]

Hi all,

I am trying now to communicate 2 machines using ax25
protocoll in a room.
The machines are using RH 7.1 kernel upgraded 2.4.19. 
The sound cards are PCI type and use the
soundmodem-0.7.

Firstly, I have tried using stereo cable as follow:
|pc1|-|sc1|------(cross connection)-----|sc2|-|pc2|
ping, ftp and telnet are worked enough.

Secondly, I am trying wireless using HT (Kenwood
TH-25G) <www.baycom.org/bayweb/tech/handy.htm> and PTT
circuit from
<http://campus.murraystate.edu/staff/scott.thile/k4set/packet/ptt.htm>.

|pc1|-|sc1|-|ht1|<~~~~~~>|ht2|-|sc2|-|pc2|
44.128.1.5                     44.128.1.8

[my1com]# route add 44.128.1.8 sm0
[my2com]# route add 44.128.1.5 sm0
[my1com]# arp -n 44.128.1.8 -H ax25 -s MY2COM -i sm0
[my2com]# arp -n 44.128.1.5 -H ax25 -s MY1COM -i sm0

[my2com]$ ping my1com
PING my1com.ampr.org (44.128.1.5) from 44.128.1.8:
56(84) bytes of data
From my2com.ampr.org (44.128.1.8): Destination Host
unreachable
..
..
From my2com.ampr.org (44.128.1.8): Destination Host
unreachable
--- my1com.ampr.org ping statistics ---
18 packets transmitted, 0 packet received, +17 errors,
100% packets loss

During ping 
[my2com]# listen -a
axconfig: port 1 not active
axconfig: port 2 not active
sc: fm my2com to my1com ctl UI pid=CC(IP) len 84
IP: len 84  44.128.1.8->44.128.1.5 ihl 20 ttl 64 DF
prot ICMP
ICMP: type Echo Request id 42758 seq 0
0000  ..J>I>..................! "#$%&'()*+,-./01234567
sc: fm my2com to my1com ctl UI pid=CC(IP) len 84
IP: len 84  44.128.1.8->44.128.1.5 ihl 20 ttl 64 DF
prot ICMP
ICMP: type Echo Request id 42758 seq 256
0000  ..J>a1..................! "#$%&'()*+,-./01234567
sc: fm my2com to my1com ctl UI pid=CC(IP) len 84
IP: len 84  44.128.1.8->44.128.1.5 ihl 20 ttl 64 DF
prot ICMP
ICMP: type Echo Request id 42758 seq 512
0000  ..J>B1..................! "#$%&'()*+,-./01234567
..
..
[my1com]# listen -a
axconfig: port 1 not active
axconfig: port 2 not active
[my1com]#
 
How can I ping correctly pc1<-->pc2?
Should I activate the serial port 1?
Can I activate the parallel port if I use
soundmodem-0.7 or it is only for serial port? As we
might know for soundblaster (ISA) we can do
# sethdlc -p -i sm0 mode sbc:afsk1200 io 0x388 irq 10
dma 1 pario 0x378

Many thanks for any help!
Vivi


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Re: sniffing on a packet radio device

[Folkert van Heusden]

Thank you all!