Re: OSI TP4 stack on netbsd

[christos%astron.com@localhost (Christos Zoulas)]

In article 
<E3D01EB81486E44780F8D15B89A53C98186D8630%HERMES.aubay-es.es@localhost>,
Marcos Pindado Sebastian  <mapindado%aubay.es@localhost> wrote:
>Hello, I would like to know if osi stack is still supported on NetBSD,
>particularly TP4 transport services.
>In the archive list along the years it seems several people tried to
>make this work but don't seem to get it.
>
>This is what we are doing:
>
>- Compile kernel with OSI stacks
>- Configure osi protocol for the interface:
>
>      XXXX# ifconfig tlp0 iso 2222
>
>      XXXX$ ifconfig -a
>      tlp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>      address: 00:30:05:56:34:d2
>      media: Ethernet autoselect (10baseT)
>      status: active
>      inet 192.168.17.55 netmask 0xffffff00 broadcast 192.168.17.255
>      inet6 fe80::230:5ff:fe56:34d2%tlp0 prefixlen 64 scopeid 0x1
>      iso 22.22 netmask
>
>- Write a simple client and server socket example. Server justs binds to
>any address and listens for connections. Client just tries to connect.
>It will happen in the same machine.
>server:
>      tp4sock = socket(AF_ISO, SOCK_SEQPACKET, 0)
>               memset(&isoaddr, 0, sizeof(isoaddr)); => Empty addr,
>listen on any nsap
>               isoaddr.siso_family = AF_ISO;
>               isoaddr.siso_tlen = 2;
>               cp = (char*)TSEL(&isoaddr); => 2 bytes for selector.
>               *cp++ = (PORT >> 8); => The same on client. Find this
>code on bsd nfs server.
>               *cp = (PORT & 0xff);
>               Bind => ok, listen => ok
>               accept => Blocks (ok)
>Client: 
>               siso.siso_addr = *iso_addr("2222"); => NSAP addr
>               int res = connect (sock,(const struct
>sockaddr*)&siso,sizeof(siso)); => Blocks forever.
>
>This is what we get:
>
>- Server seems to listen. If we specify a wrong nsap or a nsap other
>than 1111 bind doesn't work. It blocks on accept as it should.
>- netstat does not show any information about osi protocol (no listen)
>- client blocks forever on connect and does nothing. Symptoms are the
>same as (http://mail-index.netbsd.org/tech-net/1996/08/01/0001.html)
>- client blocks always. Even if no server is listening, if a wrong or
>inexistent nsap is specified etc
>- "route show" cmd shows routes for osi:
>
>ISO:
>Destination        Gateway            Flags
>(7) 0000 0000 0000 link#1             U
>(7) 0000 0002 2222 link#1             UHL
>
>
>Any help would be much appreciated. We already know it is rare to find
>people with OSI issues, but maybe someone has a simple test program or
>configuration to make this work.
>The fact is that we need TP4 and netbsd would be our best solution.

This has not been tested for many years so it is likely to be broken.
I you can test/fix it yourself, please do so and submit patches. If
you cannot, please open a PR, and submit test programs that demonstrate
the broken behavior. I can't promise that someone will look at it because
the interest is limited, but at least the behavior is going to become
reproducible and documented.

Thanks,

christos