sound card modem on a laptop?

sound card modem on a laptop?

[James Washer]

Hello,

I'm just about to begin playing with AX.25/Linux.. I'd like to get a soundcard modem running on a laptop (IBM Thinkpad), for packet and APRS use. 

I'm fairly knowledgable with linux, but not with soundcards and AX.25..

Is anyone else doing this successfully?

Should I start with a 2.6 kernel, or is that too bleeding edge for now?

Thanks for any and all help.

 - jim

p.s. Any good URLs I should visit to get my feet?

Re: sound card modem on a laptop?

[Tomi Manninen]

On Sat, 2004-01-17 at 22:42, James Washer wrote:

> I'm just about to begin playing with AX.25/Linux.. I'd like to get a 
> soundcard modem running on a laptop (IBM Thinkpad), for packet and APRS use. 
> 
> I'm fairly knowledgable with linux, but not with soundcards and AX.25..
> 
> Is anyone else doing this successfully?
> 
> Should I start with a 2.6 kernel, or is that too bleeding edge for now?

A comment about 2.6 kernels. Even though I haven't had a chance to try
it myself yet (lazy me), I have been told that the MKISS driver in the
2.6 kernel doesn't compile.

The kernel mode soundmodem has been removed in 2.6 so you have
to use the user mode soundmodem [1], and it's better anyway. However, 
the user mode soundmodem needs the MKISS driver to talk to the kernel.
So if the driver really does not compile, you can't use 2.6...

/Tomi

[1] http://www.baycom.org/~tom/ham/soundmodem/ 

-- 
Tomi Manninen / OH2BNS / KP20ME04

Re: sound card modem on a laptop?

[Jeroen Vreeken]

On 2004.01.18 17:01:15 +0100 Tomi Manninen wrote:
> On Sat, 2004-01-17 at 22:42, James Washer wrote:
> 
> > I'm just about to begin playing with AX.25/Linux.. I'd like to get a 
> > soundcard modem running on a laptop (IBM Thinkpad), for packet and APRS
> use. 
> > 
> > I'm fairly knowledgable with linux, but not with soundcards and AX.25..
> > 
> > Is anyone else doing this successfully?
> > 
> > Should I start with a 2.6 kernel, or is that too bleeding edge for now?
> 
> A comment about 2.6 kernels. Even though I haven't had a chance to try
> it myself yet (lazy me), I have been told that the MKISS driver in the
> 2.6 kernel doesn't compile.
> 
> The kernel mode soundmodem has been removed in 2.6 so you have
> to use the user mode soundmodem [1], and it's better anyway. However, 
> the user mode soundmodem needs the MKISS driver to talk to the kernel.
> So if the driver really does not compile, you can't use 2.6...

I have made some patches a while ago to fix the scc and mkiss driver in
2.6.0 and 2.6.1. They haven't made it in mainline though.
In 2.6.1 you get another warning about mkiss using cli() I have made a
patch to remove it but have yet to test it.

Jeroen

Re: sound card modem on a laptop?

[Bernard Pidoux]

[-- Attachment #1: Type: text/plain, Size: 1441 bytes --]

Tomi Manninen wrote:
> 
> A comment about 2.6 kernels. Even though I haven't had a chance to try
> it myself yet (lazy me), I have been told that the MKISS driver in the
> 2.6 kernel doesn't compile.
> 
> The kernel mode soundmodem has been removed in 2.6 so you have
> to use the user mode soundmodem [1], and it's better anyway. However, 
> the user mode soundmodem needs the MKISS driver to talk to the kernel.
> So if the driver really does not compile, you can't use 2.6...
> 
> /Tomi

I have been experimenting Mandrake Linux 10.0 rc with kernel 2.6.0 and 
the last AX25 patches
included into 2.6.1 kernel.

Mkiss driver is running well and there was no compilation problem here.

BTW compiling ax25-tools 0.0.8 gave me some warnings I was able to turn 
arround :
In ax25/axspawm.c
#include <sys/time.h> should be changed to
#include <time.h>

In netrom/net2kiss.c
#include <netinet/in.h> was missing
like in hdlcutil/hdrvcomm.c
#include <netinet/in.h> is needed for htons declaration
and looking at other sources I think that
also in hdrvcomm.c
#include <net/ethernet.h> should be modified like this

#ifdef __GLIBC__
#include <net/ethernet.h>
#else
#include <linux/if_ether.h>
#endif

There is another warning about /netrom/kissnetd.c : 106 with
sys_errlist is deprecated ; use strerror or sterror_r instead.

Although I am not familiar with diff I obtained a
diff of the ax25-tools.0.0.8 after I modified it.

73 de bernard, F6BVP


[-- Attachment #2: ax25-tools-0.0.8.diff --]
[-- Type: text/plain, Size: 1306 bytes --]

diff -ru ax25-tools-0.0.8/ax25/axspawn.c ax25-tools-0.0.8b/ax25/axspawn.c
--- ax25-tools-0.0.8/ax25/axspawn.c	2001-04-10 04:09:28.000000000 +0200
+++ ax25-tools-0.0.8b/ax25/axspawn.c	2004-01-18 21:24:04.000000000 +0100
@@ -124,7 +124,7 @@
 #include <paths.h>
 #include <errno.h>
 #include <syslog.h>
-#include <sys/time.h>
+#include <time.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/ioctl.h>
diff -ru ax25-tools-0.0.8/hdlcutil/hdrvcomm.c ax25-tools-0.0.8b/hdlcutil/hdrvcomm.c
--- ax25-tools-0.0.8/hdlcutil/hdrvcomm.c	2001-04-10 04:10:48.000000000 +0200
+++ ax25-tools-0.0.8b/hdlcutil/hdrvcomm.c	2004-01-18 22:52:46.000000000 +0100
@@ -48,7 +50,14 @@
 #include "hdrvcomm.h"
 #include "usersmdiag.h"
 #include <net/if_arp.h>
+
+#ifdef __GLIBC__
+#include <net/ethernet.h>
+#else
 #include <linux/if_ether.h>
+#endif
+#include <netinet/in.h>
+
 #include <linux/if_packet.h>
 #ifndef SOL_PACKET
 #define SOL_PACKET  263
diff -ru ax25-tools-0.0.8/kiss/net2kiss.c ax25-tools-0.0.8b/kiss/net2kiss.c
--- ax25-tools-0.0.8/kiss/net2kiss.c	2001-04-10 04:10:36.000000000 +0200
+++ ax25-tools-0.0.8b/kiss/net2kiss.c	2004-01-18 22:47:39.000000000 +0100
@@ -49,6 +49,8 @@
 #include <sys/socket.h>
 #include <net/if.h>
 
+#include <netinet/in.h>
+
 #ifdef __GLIBC__
 #include <net/ethernet.h>
 #else

Re: sound card modem on a laptop?

[Jeroen Vreeken]

On 2004.01.19 01:51:26 +0100 Bernard Pidoux wrote:
> Tomi Manninen wrote:
> > 
> > A comment about 2.6 kernels. Even though I haven't had a chance to try
> > it myself yet (lazy me), I have been told that the MKISS driver in the
> > 2.6 kernel doesn't compile.
> > 
> > The kernel mode soundmodem has been removed in 2.6 so you have
> > to use the user mode soundmodem [1], and it's better anyway. However, 
> > the user mode soundmodem needs the MKISS driver to talk to the kernel.
> > So if the driver really does not compile, you can't use 2.6...
> > 
> > /Tomi
> 
> I have been experimenting Mandrake Linux 10.0 rc with kernel 2.6.0 and 
> the last AX25 patches
> included into 2.6.1 kernel.
> 
> Mkiss driver is running well and there was no compilation problem here.

It depends on how many warnings and debugging you have turned on, although
it compiles fine there is a warning about cli() being used. It is buggy
with that respect although very hard to trigger in normal use.
What can be triggered easily is another bug in the reuse of the netdevice
structure that happens when kissattach is killed and a new kissattach
process is started...
I have fixes for both that are now being tested and it looks good sofar.

Jeroen