iso stack setup and programming problems under netbsd

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Date: 7 Jul 2005 03:22:57 -0700

While trying to ISO/OSI-communicate with an own application I
experienced some naming/routing problems an would highly appreciate if
someone could provide a working example or give a clue.

Situation: 3 Computers, directly connected over LAN
     OS MAC/SNPA NSAP
(1) NetBSD 2.0.2 00:01:02:0b:2a:e0
(2) NetBSD 2.0.2 00:04:2b:00:04:a5
(3) WinNT4.0 00:80:2b:00:80:6f 49.0.89.5a.cd.1

With command
ifconfig ex0 iso 49..89.5a.cd.02 netmask 0.0.0.0.0.0
iso networking for computer (1) was set up. Similar for (2). ESIS
packets are exchanged, in iso network monitor on (3) all 3 computers
are displayed:
     NSAP SNPA
(1) 49.0.89.5a.cd.2 00:01:02:0b:2a:e0
(2) 49.0.89.5a.cd.3 00:04:2b:00:04:a5
(3) 49.0.89.5a.cd.1 00:80:2b:00:80:6f

Under NetBSD the iso routing table (route show) looks like:
ISO:
Destination Gateway Flags
(7) 0000 0000 000 link#0 U
(7) 0000 0006 490 00:80:2b:00:80:6f UH
(7) 0000 0006 490 00:01:02:0b:2a:e0 UH
(7) 0000 000c 490 link#0 UH
(7) 0000 000e 490 link#0 UH
(7) 0000 0006 490 00:04:2b:00:04:a5 UH

Now I tried to establish a raw clnp data connection with an own
C-program (both source and sink on the same computer). I chose 8001
(siso_tlen=2) to be the TSEL for this transmission. Because of a lack
of information I assumed to concatenate NSAP and TSEL to an ISO
address. I gave the server (sink) the address "49.0.89.5a.cd.2.8001"
and tried to connect with the client (source) to the same address. With
netstat -a this looks like:
Active ISO net connections (including servers)
Proto Recv-Q Send-Q Local Address Foreign Address
(state)
tp 0 0 (4.2) (0.0) TP_CRSENT(0x
tp 0 0 (0.0) *.* TP_LISTENING

After connection timeout netstat -a says:
Active ISO net connections (including servers)
Proto Recv-Q Send-Q Local Address Foreign Address
(state)
tp 0 0 {49.0.89.5a.cd.2}
{49.0.89.5a.cd.2.80.1}[0.0.0.0.0.0.0.0.0.0.0.0.4.8.4c.9e.4.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0]<0.0.0.0.0>
 TP_REFWAIT(0
tp 0 0 (0.0) *.* TP_LISTENING

While trying to establish a connection a CLNP packet is sent over the
ethernet to the destination 09:00:2b:00:00:04 that does match neither
any of the known network hosts nor the given target address. What
mechanism of routing happens here?

Can anyone give an example of how to correct setup interfaces and
routing for iso-networking under netbsd? Has anyone a hint for
adressing in the sockaddr_iso structure. Thanks in advance.

Arndt

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