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Hi Jeff,

see my comments in-line.

Best regards
Michael

On Feb 24, 2006, at 23:26 Uhr, Jeff McDonald wrote:

Hello Michael,

I found out my problem. Once of my machines was connected as NAT not bridged. I changed the connection type and it works! I'm so delighted :)

Thanks for your help! I don't know what I would have done without your help.

- Now the next step for me is to implement multihoming. I'm sure this question has been asked a zillion times so could you just refer me to a thread that explains how I can start implementing mutlihoming?

The good news is that support of multihoming is already built-in... since the first version
going back to 1999.

- Do I need sctp api? I don't understand what it is used for.

I assume that you mean the socketapi? The sctplib provides a proprietary callback API.
The socketapilib implements on top of this the standard socket API for SCTP as described
in
http://www.ietf.org/internet-drafts/draft-ietf-tsvwg-sctpsocket-12.txt
This is used by the kernel implementations from Sun, BSD and Linux.

(If you type
modprobe sctp
on your FC4 machine, you can use the SCTP kernel implementation from Linux. Then
you can not use the sctplib...)

From: Michael Tuexen
<Michael.Tuexen AT micmac.franken.de>
To: "Jeff McDonald"
<kinggori AT msn.com>
CC:
discussion AT sctp.de
Subject: [SCTP-Discussion] Re: StreamEngine Instance doesn't exist
Date: Fri, 24 Feb 2006 22:40:48 +0100

Hi Jeff,

see my comments in-line.

Best regards
Michael

On Feb 24, 2006, at 22:34 Uhr, Jeff McDonald wrote:

Thanks for your reply Michael,

I tried ping by typing
ping <IP address of other machine>
while other machine had server_tool running and I got no reply.

This means that both machines can not talk to each other...

I'm using 2 seperate machines (My desktop and laptop) which are connected to a router. I'm running Linux Fedora Core 3 on one machine and Linux Fedora Core 4 on the other. I'm running them as a virtual machine (using VMWare). I'm using bridged networking so that the linux OS has its own IP address.

I can connect to the internet normally and I'm not behind a firewall.

Here is my ip addr output:

-------------------
1st Machine
-------------------

[root@localhost programs]# ip addr
1: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:0c:29:40:e4:a9 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.102/24 brd 192.168.0.255 scope global eth0
inet6 fe80::20c:29ff:fe40:e4a9/64 scope link
valid_lft forever preferred_lft forever
3: sit0: <NOARP> mtu 1480 qdisc noop
link/sit 0.0.0.0 brd 0.0.0.0



-------------------
2nd Machine
-------------------


1: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:0c:29:73:7e:49 brd ff:ff:ff:ff:ff:ff
inet 192.168.40.128/24 brd 192.168.40.255 scope global eth0
inet6 fe80::20c:29ff:fe73:7e49/64 scope link
valid_lft forever preferred_lft forever
3: sit0: <NOARP> mtu 1480 qdisc noop
link/sit 0.0.0.0 brd 0.0.0.0


Note that I use 192.168.0.102 (machine 1) and 192.168.40.128 (machine 2) as my IP address

So both are in separate networks. You need a router which connects both machines
and configure routes at each machine. So what is the output of

netstat -nr

Best regards
Michael

Hope you can help out
Thanks :)

From: Michael Tuexen
<Michael.Tuexen AT micmac.franken.de>
To: "Jeff McDonald"
<kinggori AT msn.com>
CC:
discussion AT sctp.de
Subject: Re: StreamEngine Instance doesn't exist
Date: Fri, 24 Feb 2006 21:44:39 +0100

Hi Jeff,

see my comments in-line.

Best regards
Michael

On Feb 24, 2006, at 20:30 Uhr, Jeff McDonald wrote:

Hello Michael and all,

Thanks for your advice regarding using Linux. I managed to install and compile sctplib according to your instructions without trouble. But when I try running programs I always get errors. Can you please have a look at the errors and give me an idea as to what might be wrong?

I’m using Fedora Core 3 on one machine and 4 on the other.

Here are 3 scenarios
---------------------------------------
Scenario 1
---------------
[root@localhost programs]# ./echo_server -i & ./terminal -d 127.0.0.1 -i
[6] 10138
Error Info: 01:41:13.881 - mdi_readSCTP_control: association not set
Error Info: 01:41:13.882 - mdi_readSCTP_control: association not set
Error Info: Error Info: 01:41:13.883 - mdi_readSCTP_control:
association not setError Info: 01:41:13.885 - mdi_readSCTP_control:
association not set
Error Info: 01:41:13.882 - sci_getCookieLifeTime(): read SCTP-control failed
Error Info: 01:41:13.888 - mdi_readRX_control: association not set
Error Info: 01:41:13.890 - rxc_buffer instance not set !
01:41:13.891 - sci_getCookieLifeTime(): read SCTP-control failed
Error Info: 01:41:13.894 - mdi_readRX_control: association not set
Error Info: 01:41:13.894 - rxc_buffer instance not set !
Error Info: 01:41:13.977 - mdi_readLocalTag: association not set
Error Info: 01:41:13.979 - mdi_readAssociationID: association not set
Error Info: 01:41:13.980 - mdi_readSCTP_control: association not set
Error Info: 01:41:13.982 - mdi_readRX_control: association not set
Error Info: 01:41:13.983 - rxc_buffer instance not set !
hi
hi
hello
hello

Nothing is wrong. These Errors are false. Just set Current_error_log_ to 0 in
globals.h and recompile.

---------------------------------------
Scenario 2
---------------
At the server:
[root@localhost programs]# ./echo_tool -V

At the client:
[root@localhost programs]# ./echo_tool -V -n 1 -d 192.168.40.128

nothing happens at both sides

Are the server and client running on the same machine? It seems that
the client can not reach the server. Is it possible via ping?

---------------------------------------
Scenario 3
---------------
At the server:
[root@localhost programs]# ./echo_server

At the client:
[root@localhost programs]# ./terminal -V -d 192.168.40.128
hello
Error Info: 22:07:27.706 - se_ulpsend: StreamEngine Instance doesn't
exist....Returning !
sctp_send: internal error !

The association has not been established. It is the same problem as
above. Is there a firewall running at the client and/or server?

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• [SCTP-Discussion] StreamEngine Instance doesn't exist, Jeff McDonald, 02/24/2006
  • [SCTP-Discussion] Re: StreamEngine Instance doesn't exist, Michael Tuexen, 02/24/2006
    • [SCTP-Discussion] Re: StreamEngine Instance doesn't exist, Jeff McDonald, 02/24/2006
      • [SCTP-Discussion] Re: StreamEngine Instance doesn't exist, Michael Tuexen, 02/24/2006
        • RE: [SCTP-Discussion] Re: StreamEngine Instance doesn't exist, Jeff McDonald, 02/24/2006
          • Re: [SCTP-Discussion] Re: StreamEngine Instance doesn't exist, Michael Tuexen, 02/25/2006

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