Hi,

Here is an excerpt from a document I prepared on SCTP implementations.

Perhaps this will help you setup a successful IPv6 test.

***

chat: a simple talk program, several of these can connect to an

echo_tool-server started with the -b flag.

combined_server: one server program, that acts as echo_server,

discard_serevr and daytime_server

daytime_server: a server that tells you the time, if you connect to

it via the terminal-program.

daytime_simple: idem, but uses sctpd

discard_server: discard everything that is sent to it

echo_monitor: gives stats about an echo server

echo_server: echoes all back, that a client sends to it

echo_tool: a more complex and sophisticated echo_server, prints stats

monitor: monitors stats of an association, and prints them nicely

formatted in a terminal window (uses ncurses).

mulp: an obsolete, old, very confusing, hacky program, this was the first

one we used at all.

test_tool: this should help you test and understand the protocol. It reads

script files and performs respective actions. Very nice.

The utilities found in ./sctpd_programs are similar except that SCTP daemon

in ./sctpd must be started so daemon utilities can use SCTP implementation

from daemon. Knowing what each utility does is only the first step, making

them work together is difficult enough as well. Here is another excerpt from

the mailing list explaining some successful usage settings:

If you are compiling on one machine and moving programs to other

nodes, you might consider using the -static option when you compile

to keep from managing libsctp.x versions every time there is a new

release.

Node 1 and 2: become superuser to allow raw socket opens

Discard Server

Node 1: run "discard_server -V -s 192.168.1.4" (be sure to use your IP

address of node 1)

Node 2: run "terminal -V -r 9 -s 192.168.1.3 -d 192.168.1.4

Echo Server

Node 1: run "echo_server -V -s 192.168.1.4" (be sure to use your IP address

of node 1)

Node 2: run "terminal -V -r 7 -s 192.168.1.3 -d 192.168.1.4

Daytime Server

Node 1: run "daytime_server -V -s 192.168.1.4" (be sure to use your IP

address of node 1)

Node 2: run "terminal -V -r 13 -s 192.168.1.3 -d 192.168.1.4

Combined Server

Node 1: run "combined_server -V -s 192.168.1.4" (be sure to use your IP

address of node 1)

Node 2: for echo run "terminal -V -r 7 -s 192.168.1.3 -d 192.168.1.4

for discard run "terminal -V -r 9 -s 192.168.1.3 -d

192.168.1.4

for daytime run "terminal -V -r 13 -s 192.168.1.3 -d

192.168.1.4

Let's go through one scenario with two nodes having IPv6 addresses. The

server will be node1 with IPv6 address fec0::1:250:b7ff:fe14:35be and the

client will be node2 with IPv6 address fec0::1:250:b7ff:fe14:35c4.

Initially, we start an echo server on node1:

node1% cd ./programs

node1% ./echo_server -V -s fec0::1:250:b7ff:fe14:35be

We are ready to connect to node1 from client node2 and we will use

'terminal' program. The 'r' option is to specify which port to use. For some

reason, this has a direct effect on whether the connection will work or not

and this has not been officially documented anywhere. Once connected to

node1, anything you type will be echoed back to you and you only.

node2% ./terminal -V -r 7 -d fec0::1:250:b7ff:fe14:35be -s

fec0::1:250:b7ff:fe14:35c4

Try typing a few things, run a sniffer to convince yourself that traffic is

truly IPv6 SCTP. Remember that SCTP protocol number is 132 in case your

sniffer doesn't explicitly support SCTP protocol.

***

If you have any questions, let me know,

David