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Hi folks,

I've been testing echo_server & echo tool and came
across following problem:

I've made just one modification to echo_server - my
echo_server doesn't send
back data it receives.

I started echo server on "A" and then echo_tool on "Z"
with the -d param
supplying an ip address of "A" endpoint. echo_server
reported 'Communication
up' and reception of data sent by echo_tool. Then I
killed echo_tool
and restarted it. echo_server reported 'Restart'. Then
I killed echo_tool
again and waited till echo_server reported
'Communication lost'.

Now becomes the crucial moment - when I start
echo_tool again, echo_server
crashes (core dump). Sometimes it happens as soon as
the second association
is about to be established, sometimes it happens later
but allways when either
new association is about to be established or existing
association is being
closed.

It happens only if association restarts occur. When I
start heartbeats
in the echo_server it seems to crash even more
frequently. When I'm testing
original echo_server that sends back received data
crashes never occur.

here is what I see:

[root@pc122 programs]# ./echo_server -s 1.1.1.122 -V
1 : Communication up (1 paths)
1 : Communication up (1 In-Streams, 17
Out-Streams)
1 : Data arrived (512 bytes on stream 0,
ordered)
1 : Restart
1 : Data arrived (512 bytes on stream 0,
ordered)
1 : Restart
1 : Data arrived (512 bytes on stream 0,
ordered)
1 : Communication lost (status 2)
sctp_receiveUnsent: not yet implemented.
sctp_receiveUnacked: not yet implemented.
2 : Communication up (1 paths)
2 : Communication up (1 In-Streams, 17
Out-Streams)
2 : Data arrived (512 bytes on stream 0,
ordered)
2 : Restart
2 : Data arrived (512 bytes on stream 0,
ordered)
2 : Communication lost (status 2)
sctp_receiveUnsent: not yet implemented.
sctp_receiveUnacked: not yet implemented.
Segmentation fault (core dumped)

anyone has any idea what may be wrong?

cheers,
Pavel

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• [SCTP-Discussion] echo_server crashes after association restart, Pavel Richtr, 09/10/2001
  • Re: [SCTP-Discussion] echo_server crashes after association restart, Michael Tuexen, 09/11/2001

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