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Re: [SCTP-Discussion] sctp ip addresses aren't sent?


Chronological Thread 
  • From: Michael Tüxen <Michael.Tuexen AT micmac.franken.de>
  • To: Razvan Marcus <razvan_marcus AT yahoo.com>
  • Cc: discussion AT sctp.de
  • Subject: Re: [SCTP-Discussion] sctp ip addresses aren't sent?
  • Date: Tue Jun 10 18:52:04 2003
  • List-id: SCTP Discussions <discussion.sctp.de>

Hi,

the sctplib puts in the INIT/INIT-ACK chunks the addresses only, if more than
one is used. This is intentionally to let SCTP work with NATs.

If this does not explain the behaviour, please send the
- command lines you entered,
- a libpcap file (use for example ethereal or tcpdum (-s 0) showing
the commnication
- and the output of ifconfig -a on both machines.

I'm not sure that there is anything wrong, can the client and the
server to to each other?

Best regards
Michael

On Tuesday, Jun 10, 2003, at 16:07 Europe/Berlin, Razvan Marcus wrote:

   Hello,
 
     I'm using the example programs: sctpterminal et TCP_combined_server for some tests.
For both, I'm using the port 7 (echo) and ethereal to capture sctp packets.
    When I'm using sctpterminal & TCP_combined_server on the same machine all works well. The INIT sctp is well composed. When I'm using 2 machines, on the same private network the IP addresses aren't visible in the INIT packet.
  Here are some traces:
 
- same machine:
 
cd 57 00 07 00 00  00 00 6d 4b 3d 5c 01 00
00 30 29 3f b1 9b 00 00  7f ff 00 01 00 01 31 1e
09 38 c0 00 00 04 00 0c  00 06 00 05 00 00 00 05
00 08 7f 00 00 01 00 05  00 08 c0 a8 01 0f
 
 
00 05 00 08 7f 00 00 01 - corresponds to 127.0.0.1
00 05 00 08 c0 a8 01 0f - corresponds to 192.168.1.15
 
- when I put the TCP_combined_server on the 192.168.1.159
 
d8 44 00 07 00 00  00 00 36 d2 d1 3e 01 00
00 20 10 74 30 9a 00 00  7f ff 00 01 00 01 19 63
cd cb c0 00 00 04 00 0c  00 06 00 05 00 00 
 
The addresses are missing.
 
My network is 192.168.1.0/255.255.255.0. I'm using socketapi-1.2.0 with sctplib-1.0.0-pre19.
Can you tell me where is the problem?
 
 Regards,
Razvan Marcus
 



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